The article ＂Cationic liposome-mediated transfection of CD40 ligand gene inhibits hepatic tumor growth of hepatocellular carcinoma in mice＂ [doi： 10. 1631/jzus.B0820178] by Jiang et al.（2009） in a recent issue of...The article ＂Cationic liposome-mediated transfection of CD40 ligand gene inhibits hepatic tumor growth of hepatocellular carcinoma in mice＂ [doi： 10. 1631/jzus.B0820178] by Jiang et al.（2009） in a recent issue of the Journal of Zhejiang University SCIENCE B was highly thought provoking. The authors have clearly demonstrated the efficacy of CD40 ligand gene therapy in inhibiting the growth of hepatocellular carcinomas. The findings of Jiang et al.（2009） are highly important as they further support and corroborate the rapidly expanding role of CD40 ligand gene therapy in the management of systemic malignancies besides hepatocellular carcinomas.展开更多
BACKGROUND Mismatch repair deficient/microsatellite instability-high(MMR-D/MSI-H)colorectal cancers(CRCs)possess a distinctive genomic profile that results in a spectrum of phenotypic attributes setting them apart fro...BACKGROUND Mismatch repair deficient/microsatellite instability-high(MMR-D/MSI-H)colorectal cancers(CRCs)possess a distinctive genomic profile that results in a spectrum of phenotypic attributes setting them apart from their mismatch repair proficient(MMR-P)or microsatellite stable(MSS)counterparts.CRCs have several prognostic factors,including stage,tumor differentiation,location,lymphovascular and perineural invasion,tumor budding,tumor infiltrating lymphocytes,lymph node yield(LNY),and lymph node ratio(LNR).AIM To determine the unique phenotypic characteristics of MMR-D/MSI-H CRCs and leverage the conventional wisdom of LNY and LNR with the distinctive characteristics of MMR-D/MSI-H CRCs.METHODS This retrospective analysis involved 223 stage I-III CRC patients who underwent surgical resection without neoadjuvant treatment.Clinical and histological features were obtained from patient records and by re-examining the hematoxylin and eosin-stained slides.MMR/MSI status was evaluated for all patients using either MMR immunohistochemistry or MSI testing.RESULTS Of the 223 patients in our study,87(39.01%)were MMR-D/MSI-H CRCs while 136(60.99%)were MMR-P/MSS CRCs.The MMR-D/MSI-H CRCs exhibited significant statistical differences compared to the MMR-P/MSS CRCs in several factors,including location,stage,tumor budding,lymphovascular and perineural invasion,lymphocytic response,LNY,LNR,and size of uninvolved lymph nodes.LNY and LNR were significantly higher in MMR-D/MSI-H group compared with the MMR-P/MSS group(P=0.003 and P<0.001,respectively).Also,the interquartile range of the largest uninvolved lymph node was 1 cm(0.8 cm-1.2 cm)in MMR-D/MSI-H CRCs compared to 0.7 cm(0.6 cm-0.97 cm)in MMRP/MSS CRCs.The overall survival for the MMR-P/MSS CRC group was 71%at five years,and the MMR-D/MSIH CRC group was 92%at five years(P<0.001).CONCLUSION MMR-D/MSI-H CRCs possess a unique genomic profile that leads to distinct phenotypic characteristics,including an enhanced immune response.This distinctive profile underscores the substantial prognostic and predictive value of MMR-D/MSI-H status in CRC.展开更多
AIM： TO examine the immunoreactivity of E-cadherin and four subtypes of catenin family in human hepatocellular carcinomas （HCCs） and to investigate the correlation between expression of E-cadherin/ catenin complex ...AIM： TO examine the immunoreactivity of E-cadherin and four subtypes of catenin family in human hepatocellular carcinomas （HCCs） and to investigate the correlation between expression of E-cadherin/ catenin complex and clinicopathologic parameters of HCC patients. METHODS： An immunohistochemical study for E-cadherin and catenins was performed on 97 formalin-fixed, paraffin-embedded specimens of HCC. RESULTS： Reduced expression of E-cadherin, ^-, 13-, y-catenin and p120 was observed in 69%, 76%, 63%, 71% and 73%, respectively. Both expressions of E-cadherin and catenin components were significantly correlated with tumor grade （P = 0.000）. It showed significant difference between expression of catenin members and tumor stage （P = 0.003, P = 0.017, P = 0.007 and P = 0.000, respectively）. The reduced expression of E-cadherin in HCCs was significantly correlated with intrahepatic metastasis （IM） and capsular invasion （P = 0.008, P = 0.03, respectively）. A close correlation was also observed between the expression of catenins and the tumor size （P = 0.002, P = 0.034, P = 0.016 and P = 0.000, respectively）. In addition, the expression of each catenin was found correlated with IM （P = 0.012, P = 0.049, P =0.026 and P = 0.014, respectively）. No statistically significant difference was observed between the expression level of E-cadherin/catenin complex and lymph node permission, vascular invasion and satellite nodules. Interestingly, only expression of p120 showed correlation with AFP value （P = 0.035）. The expression of E-cadherin was consistent with α-, β-, γ-catenin and p120 expression （P = 0.000）. Finally, the abnormal expression of E-cadherin/catenin complex was significantly associated with patients＇ survival （P = 0.0253, P = 0.0052, P = 0.003, P = 0.0105 and P = 0.0016, respectively）. Nevertheless, no component of E-cadherin/catenin complex was the independent prognostic factor of HCC patients. CONCLUSION： Down-regulated expressions of E-cadherin, catenins and p120 occur frequently in HCCs and contribute to the progression and development of tumor. It may be more exact and valuable to detect the co-expression of E-cadherin/catenin complex than to explore one of them in predicting tumor invasion, metastasis and patient＇s survival.展开更多
AIM To provide more information and therapeutic methods about gastric neuroendocrine carcinomas(G-NECs) which occur rarely but are highly malignant and clinically challenging.METHODS We retrospectively analyzed the cl...AIM To provide more information and therapeutic methods about gastric neuroendocrine carcinomas(G-NECs) which occur rarely but are highly malignant and clinically challenging.METHODS We retrospectively analyzed the clinicopathological characteristics, treatments, and prognosis of 43 G-NEC patients at our hospital between January 2007 and December 2014. The diagnosis was based on the 2010 World Health Organization criteria.RESULTS Forty-three G-NECs containing 39 small cell carcinomas and 4 large cell NECs with Ki67 > 60% were included in this study, accounting for only 0.95% of all gastric carcinomas. The median patient age was 62 years (range, 33-82) and the male-to-female ratio was 4.4:1. All patients underwent surgery, including 38 curative resections and 5 palliative resections. Among these 43 patients, nearly half(48.84%) of these tumors were located in the cardiac region of the stomach, regional lymph node metastasis was found in 31 cases(72.09%), and liver metastasis was found in 6 cases(13.95%). Follow-up information was got for 40 patients. Twentythree die of this disease with a median survival of 31 mo(range 1-90). The 1-year, 2-year, 3-year, and 5-year survival rate was 77.50%, 57.04%, 44.51%, and 35.05%, respectively. Survival was better in patients with tumor located in the cardiac region of the stomach, less than 7 lymph nodes metastasis and no liver metastasis. Five patients did not undergo postoperative chemotherapy, and the median survival time for these patients was 15 mo. For the remaining 34 patients who received postoperative chemotherapy, the median survival time was 44 mo and those received etoposide, cisplatin, and Paclitaxel survived the best. One patient with resected liver metastasis who received postoperative Capecitabine plus Oxaliplatin and Paclitaxel systemic chemotherapy plus octreotide LAR(30 mg intramuscularly, every 4 wk, for 2 years) has survived for 74 mo with no recurrence.CONCLUSION G-NECs are mostly nonfunctioning, which lead to a delay in detection. Local and/or distant metastases were noticed in most patients when diagnosed, and they required postoperative medical treatment. Adjuvant etoposide, cisplatin plus Paclitaxel systemic chemotherapy is recommended for these patients.展开更多
AIM: To understand the expression of latent and lytic genes of Epstein-Barr virus (EBV) in EBV-associated gastric carcinoma (EBVaGC) and to explore the relationship between EBV-encoded genes and development of EBVaGC ...AIM: To understand the expression of latent and lytic genes of Epstein-Barr virus (EBV) in EBV-associated gastric carcinoma (EBVaGC) and to explore the relationship between EBV-encoded genes and development of EBVaGC at molecular level, METHODS: One hundred and seventy-two gastric carcinoma tissues and 172 corresponding para-carcinoma tissues were tested for EBV genome by polymerase chain reaction (PCR)-Southern blotting. EBV-encoded small RNA (EBER) 1 of the PCR positive specimens was detected by in situ hybridization (ISH). Gastric carcinomas with positive EBER1 signals were classified as EBVaGCs. RT-PCR and Southern hybridization were applied to the detection of expression of nuclear antigen (EBNA) promoters (Qp, Wp and Cp), EBNA 1 and EBNA 2, latent membrane proteins (LMP) 1, 2A and 2B and lytic genes (immediate early genes BZLF1 and BRLF1, early genes BARF1 and BHRF1, late genes BcLF1 and BLLF1) in EBVaGCs. RESULTS: Eleven EBV positive samples existed in gastric carcinoma tissues (6.39%). No EBV positive sample was found in corresponding para-carcinoma tissues. The difference between EBV positivity in carcinoma tissues and corresponding para-carcinoma tissues was significant (x2 = 9.0909, P = 0.0026). Transcripts of Qp and EBNA1 were detected in all the 11 EBVaGCs, while both Wp and Cp were silent. EBNA2, LMP1 and LMP2B mRNA were absent in all the cases, while LMP2A mRNA was detected in 4 of the 11 cases. Of the 11 EBVaGCs, 7 exhibited BcLFl transcripts and 2 exhibited BHRF1 transcripts. The transcripts of BZLF1 and BARF1 were detected in 5 cases, respectively. No BLLF1 and BRLF mRNA were detected. CONCLUSION: The latent pattern of EBV in gastric carcinoma corresponds to the latency I/II. Some lytic infection genes are expressed in EBVaGCs tissues. BARF1 and BHRF1 genes may play an important role in tumorigenesis of gastric carcinoma.展开更多
AIM To determine the prevalence of epstein-barr virus(eb V)-associated gastric carcinomas in the North Region of Portugal and to study its clinicopathological characteristics. METHODS We have performed a retrospective...AIM To determine the prevalence of epstein-barr virus(eb V)-associated gastric carcinomas in the North Region of Portugal and to study its clinicopathological characteristics. METHODS We have performed a retrospective study including a total of 179 consecutive patients with gastric cancer(GC) submitted to gastrectomy during 2011 at the Portuguese Oncology Institute of Porto. Clinical and pathological data was collected from individual clinical records and inserted on a database with unique codification. Tumour tissues were collected from the institutional tumour bank. eb V was detected by in situ hybridization for the detection of eb V-encoded small RNAs(ebe Rs) and eb V latent proteins(LMP1 and LMP2 A) were detected by immunohistochemistry.RESULTS The analysis showed that eb V-associated gastric carcinomas(eb Va GC) represents 8.4%(15/179) of all GC cases, with a significant differential distribution among histological types(P < 0.001): 100%(3/3) of medullary carcinomas, 100%(1/1) of adenosquamous carcinoma, 8.7%(8/92) of tubular adenocarcinomas, 8.0%(2/25) of mixed carcinomas and 2%(1/51) in poorly cohesive carcinomas. The analysis revealed a higher predominance of eb Va GC in the upper third and middle(cardia, fundus and body) of the stomach(P = 0.041), a significant lower number of regional lymph nodes invasion(P = 0.025) and a tendency for better prognosis(P = 0.222). eb V latent protein expression revealed that all eb Va GC cases were LMP1-negative, nevertheless 6 cases(40%) expressed LPM2 A, which reveals that these cases show a distinct eb V-Latency profile(latency II-like).CONCLUSION eb Va GC represents 8.4% of all GC in the North Region of Portugal. The eb V-infected patients have specific clinic-pathological features that should be further explored to develop new strategies of management and treatment.展开更多
AIM To investigate the role of telomeric association in the development of esophageal cancer. METHODS Using chromosome R banding technique, telomeric association of chromosome in peripheral blood lymphocytes from 1...AIM To investigate the role of telomeric association in the development of esophageal cancer. METHODS Using chromosome R banding technique, telomeric association of chromosome in peripheral blood lymphocytes from 16 untreated patients with esophageal squamous cell carcinoma were observed and 16 healthy adults served as controls. RESULTS The telomeric association frequencies of cell and chromosomes were significantly higher than those of controls (x 2=9.56,P<0.01), but its distribution on the chromosome showed no significant difference (x 2=1.01, P>0.05) between the two groups. CONCLUSION Chromosomal instability can be initiated by telomeric associations, and sequential chromosome analysis can aid the understanding of the tumor occurrence and progression.展开更多
Neuroendocrine carcinomas(NEC) of the pancreas are defined by a mitotic count > 20 mitoses/10 high power fields and/or Ki67 index > 20%, and included all the tumors previously classified as poorly differentiated...Neuroendocrine carcinomas(NEC) of the pancreas are defined by a mitotic count > 20 mitoses/10 high power fields and/or Ki67 index > 20%, and included all the tumors previously classified as poorly differentiated endocrine carcinomas. These latter are aggressive malignancies with a high propensity for distant metastases and poor prognosis, and they can be further divided into small- and large-cell subtypes. However in the NEC category are included also neuroendocrine tumors with a well differentiated morphology but ki67 index > 20%. This category is associated with better prognosis and does not significantly respond to cisplatin-based chemotherapy, which represents the gold standard therapeutic approach for poorly differentiated NEC. In this review, the differences between well differentiated and poorly differentiated NEC are discussed considering both pathology, imaging features, treatment and prognostic implications. Diagnostic and therapeutic flowcharts are proposed. The need for a revision of current classification system is stressed being well differentiated NEC a more indolent disease compared to poorly differentiated tumors.展开更多
AIM: Metastases from lung cancer to gastrointestinal tract are not rare at postmortem studies but the development of clinically significant symptoms from the gastrointestinal metastases is very unusual. METHODS: Forma...AIM: Metastases from lung cancer to gastrointestinal tract are not rare at postmortem studies but the development of clinically significant symptoms from the gastrointestinal metastases is very unusual. METHODS: Formalin-fixed, paraffin-embedded tissues were cut into 5 urn thick sections and routinely stained with hematoxylin and eosin. Some slides were also stained with Alcian-PAS. Antibodies used were primary antibodies to pancytokeratin, cytokeratin 7, cytokeratin 20, epithelial membrane antigen, vimentin, smooth muscle actin and CD-117. RESULTS: We observed three patients who presented with multiple metastases from large cell bronchial carcinoma to small intestine. Two of them had abdominal symptoms (sudden onset of abdominal pain, constipation and vomiting) and in one case the tumor was incidentally found during autopsy. Microscopically, all tumors showed a same histological pattern and consisted almost exclusively of strands and sheets of poorly cohesive, polymorphic giant cells with scanty, delicate stromas. Few smaller polygonal anaplastic cells dispersed between polymorphic giant cells, were also observed. Immunohistochemistry showed positive staining of the tumor cells with cytokeratin and vimentin. Microscopically and immunohistochemically all metastases had a similar pattern to primary anaplastic carcinoma of the small intestine. CONCLUSION: In patients with small intestine tumors showing anaplastic features, especially with multiple tumors, metastases from large cell bronchial carcinoma should be first excluded, because it seems that they are more common than expected.展开更多
BACKGROUND Recently, more and more studies have demonstrated the pivotal role of programmed death 1/programmed death ligand 1(PD-1/PD-L1) pathway in the immune evasion of tumors from the host immune system. However, t...BACKGROUND Recently, more and more studies have demonstrated the pivotal role of programmed death 1/programmed death ligand 1(PD-1/PD-L1) pathway in the immune evasion of tumors from the host immune system. However, the role of PD-1/PD-L1 pathway in gastric neuroendocrine carcinomas(G-NECs) remains unknown.AIM To investigate the expression of PD-1/PD-L1 and role of PD-1/PD-L1 pathway in G-NECs, which occur rarely but are highly malignant and clinically defiant.METHODS We investigated the expression of PD-L1 on tumor cells and PD-1^+, CD8^+, and FOXP3^+ T cell infiltration by immunohistochemistry in 43 resected G-NEC tissue specimens. The copy number alterations of PD-L1 were assessed by qRT-PCR.RESULTS Most of the G-NECs tumor cells exhibited a near-uniform expression pattern of PD-L1, while some showed a tumor-stromal interface enhanced pattern. Of the 43G-NECs, 21(48.8%) were classified as a high PD-L1 expression group, and the high expression of PD-L1 was associated with poor overall survival(OS). The high expression of PD-L1 was correlated with abundant PD-1^+ tumor infiltrating lymphocytes(TILs) instead of CD8^+ TILs and FOXP3^+ regulatory T cells(Tregs).Our analysis also suggested that the infiltration of CD8^+ TILs tended to be a favorable factor for OS, although the difference did not reach the statistical significance(P = 0.065). Meanwhile, PD-L1 was significantly overexpressed in cases with copy number gain as compared with those without.CONCLUSION Our data demonstrated for the first time that high expression of PD-L1 in GNECs is associated with a poor prognosis, while the high expression may be due to the copy number variation of PD-L1 gene or stimulation of TILs. These results provide a basis for the immunotherapy targeting PD-1/PD-L1 pathway in GNECs.展开更多
Hepatocellular carcinoma (HCC) is one of the most common cancers in the world. Conventional diagnosis and treatment of this malignancy have been dismal and should be complemented by novel tools. The development and pr...Hepatocellular carcinoma (HCC) is one of the most common cancers in the world. Conventional diagnosis and treatment of this malignancy have been dismal and should be complemented by novel tools. The development and progress of HCC are believed to be caused by the accumulation of genetic changes resulting in altered expression of thousands of cancer-related genes, which can be measured by globe genetic analysis. Gene expression profiling of HCC has been employed to elucidate hepatocarcinogenesis and disclose molecular mechanisms underlying complex clinical features.Identifying phenotype-associated genes/profiles has impacts on current diagnosis and management strategy of HCC. In spite of some pitfalls of this technology and challenges in improving the research process, scrutinous validation of profiling data of HCC combined with other approaches will eventually benefit the patients.展开更多
AIM： Tumor angiogenesis has been shown to be promoted by vascular endothelial growth factor （VEGF） via stimulating endothelial cell proliferation, migration, and survival. Blockade of VEGF signaling by different me...AIM： Tumor angiogenesis has been shown to be promoted by vascular endothelial growth factor （VEGF） via stimulating endothelial cell proliferation, migration, and survival. Blockade of VEGF signaling by different means has been demonstrated to result in reduced tumor growth and suppression of tumor angiogenesis in distinct tumor entities. Here, we tested a recombinant adenovirus, AdsFItl-3, that encodes an antagonistically acting fragment of the VEGF receptor 1 （Fit-l）, for systemic antitumor effects in pre-established subcutaneous CRC tumors in mice.METHODS： Murine colorectal carcinoma cells （CT26） were inoculated subcutaneously into Balb/c mice for in vivo studies. Tumor size and survival were determined. 293 cell line was used for propagation of the adenoviral vectors. Human lung cancer line A549 and human umbilical vein endothelial cells were transfected for in vitro experiments.RESULTS： Infection of tumor cells with AdsFlt1-3 resulted in protein secretion into cell supernatant, demonstrating correct vector function. As expected, the secreted sFlt1-3 protein had no direct effect on CT26 tumor cell proliferation in vitro, but endothelial cell function was inhibited by about 46% as compared to the AdLacZ control in a tube formation assay. When AdsFlt1-3 （5×10^9 PFU/animal） was applied to tumor bearing mice, we found a tumor inhibition by 72% at d 12 after treatment initiation, in spite of these antitumoral effects, the survival time was not improved. According to reduced intratumoral microvessel density in AdsFlt1-3-treated mice, the antitumor mechanism can be attributed to angiostatic vector effects. We did not detect increased systemic VEGF levels after AdsFlt1-3 treatment and liver toxicity was low as judged by serum alanine aminotransferase determination.CONCLUSION： In this study we confirmed the value of a systemic administration of AdsFItl-3 to block VEGF signaling as antitumor therapy in an experimental metastatic colorectal carcinoma model in mice.展开更多
Purpose: To evaluate outcome and toxicity after carbon ion radiotherapy (RT) in skin carcinomas. Patients and Methods: Between November 2006 to September 2008,
Objective： The purpose of this study was to study the clinical and pathological characteristics of breast intraductal proliferative lesions （IDPLs） and associated with invasive breast cancer. Methods： We reviewed ...Objective： The purpose of this study was to study the clinical and pathological characteristics of breast intraductal proliferative lesions （IDPLs） and associated with invasive breast cancer. Methods： We reviewed 327 cases of breast intra- ductal proliferative lesions including 53 cases of usual ductal hyperplasia, 57 cases of atypical ductal hyperplasia, 89 cases of ductal carcinoma in situ, and 128 cases coexist with invasive ductal carcinomas. Cases of pure invasive cancer without intraductal proliferative lesions were excluded. The mult IDPLs biological parameters including the express of ER, PR, HER2, HIF-lo and Ki-67 detected by immunohistochemistry S-P method （n = 327） and the levels of CA153, TSGF, CA125 and CEA both in nipple discharge and serum （n = 179） measured with Electrochemiluminescence method and their relationship were studied, and 30 cases of normal pregnant women were compared with. Results： A single histologic subtype was present in 49.85% （163/327） of the cases, two subtypes in 33.03% （108/327）, and three in 17.13% （56/327）. The most common subtypes present were cribriform （43.12%, 141/327） and solid （38.53%, 126/327）, while the comedo （16.35%, 54/327）, and micropapillary （12.84%, 42/327） subtypes were less common. Comedo and solid were frequently found together for coexpres- sion as were micropapillary and papillary subtypes. However, Comedo subtype was much less likely to be found with papillary, cribriform or micropapillary subtypes. Additionally, comedo subtypes tend to be hormone receptor negative, Her2 positive and high-grade while the cribriform and solid subtype tends to be hormone receptor positive, Her2 negative and low grade. Papil- lary subtype was least likely to be associated with an invasive cancer. Furthermore, the nipple discharge and serum levels of CA153, TSGF, CA125 and CEA in coexist with invasive ductal carcinomas patients were significantly higher than those in the benign breast disease （pure intraductal proliferative lesions） and normal pregnant women （P 〈 0.01）. Additionally, the levels of CA153, TSGF, CA125 and CEA in nipple discharge were significantly higher than in the serum （P 〈 0.01）, and had a positive correlation with the Ki-67, grade, clinical stage, lymph node metastasis and tumor recurrence （P 〈 0.05）, and negative correla- tion with the level of ER and PR （P 〈 0.05）. The sensitivity of the four serum tumor markers in combination was only 69.77%, in contrast, the combined detection both in discharge and serum was 97.67%, and the negative predictive value was 99.03%. The sensitivity of combined detection both in nipple discharge and serum were significantly higher than other detection （P 〈 0.05）. Conclusion： IDPLs often present more than one histologic subtype and the most common subtypes are cribriform and solid, while comedo and micropapillary subtypes are less common. Our results suggest that the levels of CA153, TSGF, CA125 and CEA in nipple discharge were significantly higher than those in the serum, and is associated with HIF-le. The aberration of HIF-la may play a key role during oncogenesis and promote breast cellular transformation into malignancy, a finding useful for further understanding of tumorigenesis. Nipple discharge can be the earliest presenting symptom of breast cancer. The dynamic combined detection of the four tumor markers both in nipple discharge and serum are helpful to the stratification of preoperative patients and benefit to better prewarning markers for monitoring their recurrence and metastasis and clinical staging of tumors in clinic, but cannot increase the sensitivity of judging the patients with early breast cancer.展开更多
Currently,18F-FDG coincidence SPECT(Co-SPECT)/CT scan still serves as an important tool for diagnosis,staging,and evaluation of cancer treatment in developing countries.We implemented full physical corrections(FPC) to...Currently,18F-FDG coincidence SPECT(Co-SPECT)/CT scan still serves as an important tool for diagnosis,staging,and evaluation of cancer treatment in developing countries.We implemented full physical corrections(FPC) to Co-SPECT(quantitative Co-SPECT) to improve the image resolution and contrast along with the capability for image quantitation.FPC included attenuation,scatter,resolution recovery,and noise reduction.A standard NEMA phantom filled with 10:1 F-18 activity concentration ratio in spheres and background was utilized to evaluate image performance.Subsequently,15 patients with histologically confirmed thoracic carcinomas were included to undergo a 18 F-FDG Co-SPECT/CT scan followed by a 18 F-FDG PET/CT scan.Functional parameters as SUVmax,SUVmean,SULpeak,and MTV from both quantitative Co-SPECT and PET were analyzed.Image resolution of Co-SPECT for NEMA phantom was improved to reveal the smallest sphere from a diameter of 28 mm to 22 mm(17 mm for PET).The image contrast was enhanced from 1.7 to 6.32(6.69 for PET) with slightly degraded uniformity in background(3.1% vs.6.7%)(5.6% for PET).Patients’ SUVmax,SUVmean,SULpeak,and MTV measured from quantitative Co-SPECT were overall highly correlated with those from PET(r=0.82-0.88).Adjustment of the threshold of SUVmax and SUV to determine SUVmean and MTV did not further change the correlations with PET(r=0.81-0.88).Adding full physical corrections to Co-SPECT images can significantly improve image resolution and contrast to reveal smaller tumor lesions along with the capability to quantify functional parameters like PET/CT.展开更多
Asip is a mammalian homologue of polarity protein Par-3 of Caenorhabditis elegans and Bazooka of Drosophila melanogaster. Asip/Par-3/Bazooka are PDZ-motif containing proteins that localize asymmetrically to the cell p...Asip is a mammalian homologue of polarity protein Par-3 of Caenorhabditis elegans and Bazooka of Drosophila melanogaster. Asip/Par-3/Bazooka are PDZ-motif containing proteins that localize asymmetrically to the cell periphery and play a pivotal role in cell polarity and asymmetric cell division. In the present study, we have cloned human asip cDNA and its splicing variants by 5’-RACE and RT-PCR using candidate human EST clones which have a high homology to rat asip cDNA. The full-length cDNA of human asip encodes a 1,353 aa protein exhibiting 88% similarity to the rat one. Human asip is a single copy gene consisting of at least 26 exons and localizing in human chromosome 10, band p11.2, with some extraordinarily long introns. All exon/intron boundary nucleotides conform to the "gt-ag" rule. Three main transcripts were detected by Northern blot analysis, and at least five variants, from alternative splicing and polyadenylation, have been identified by RT-PCR and liver cDNA library screening. Exon 17b deleted asip mRNAs expressed ubiquitously in normal human tissues, including liver, on RT-PCR analysis. However, they were absent from most human liver cancer cell lines examined. More interestingly, the expression of exon 1 7b deleted variants was down regulated in 52.6% (10/19) clinic specimens of human hepatocellular carcinomas (HCCs), compared with the surrounding nontumorous liver tissues from the same patients. The presence of various splicing transcripts, the variation of their distribution among different tissues and cells, and their differential expressions in human HCCs suggest that human Asip isoforms may function in different context.展开更多
Objective： We compared positron emission tomography （PET） using 18-fluoro-2-deoxyglucose （FDG）, enhanced computed tomography （CT） and magnetic resonance imaging （MRI） in detecting skull base invasion of nasop...Objective： We compared positron emission tomography （PET） using 18-fluoro-2-deoxyglucose （FDG）, enhanced computed tomography （CT） and magnetic resonance imaging （MRI） in detecting skull base invasion of nasopharyngeal carcinomas （NPC） and to evaluate the value of these three methods in determining the existence of skull base invasion of nasopharyngeal carcinomas. Methods： The images of enhanced CT, MRI and PET-CT scans, performed at intervals -〈 20 days on 57 NPC patients from July 2004 to February 2007, were selected and reviewed. The endpoints of the comparison were sensitivity, specificity, accuracy, positive predictive value （PPV） and negative predictive value （NPV） of Enhanced CT, MRI and PET-CT, based on histopathologic findings or clinical imaging follow-up for at least 6 months. Results： For detecting skull base invasion of NPC, the sensitivity of enhanced CT, MRI and PET-CT were 68.18%, 84.09%, 97.67% respectively; speci- ficity were 76.92%, 69.23%, 57.14% respectively; accuracy were 70.18%, 80.7%, 87.72% respectively; PPV were 90.9%, 90.24%, 87.5% respectively; NPV were 41.67%, 56.25%, 88.89% respectively. Conclusion： PET-CT has obvious advantages in sensitivity over CT （P 〈 0.05） and MRI, better than the two methods in accuracy and NPV and may be more valuable for new patients in detecting skull base invasion of NPC patients.展开更多
OBJECTIVE: To study the sonographic features and patterns of cystic renal carcinomas. METHODS: Thirteen cases of cystic renal carcinoma confirmed by operation and pathology were examined by ultrasonography, and the cy...OBJECTIVE: To study the sonographic features and patterns of cystic renal carcinomas. METHODS: Thirteen cases of cystic renal carcinoma confirmed by operation and pathology were examined by ultrasonography, and the cystic walls, septa and solid mural nodules were studied. RESULTS: Solid mural nodules of some cases and irregular thickening of the cystic walls and septa were characteristic findings for the ultrasonic diagnosis of cystic renal carcinomas. According to their pathologic mechanisms and sonographic features, cystic renal carcinomas were classified into 3 patterns: unilocular cystic mass, multiloculated cystic mass and cystic-solid mass. CONCLUSIONS: Typical cystic renal carcinomas can be well diagnosed, while atypical cases may be misdiagnosed as benign renal cysts by ultrasonography. Color Doppler ultrasonography and needle aspiration guided by ultrasonography are helpful in the diagnosis of these atypical cases.展开更多
Objective： To investigate the correlations among the expressions of hypoxia-inducible factor-1α （HIF-1α）, vascular endothelial cell growth factor （VEGF） and microvessel density （MVD）, and their relationships ...Objective： To investigate the correlations among the expressions of hypoxia-inducible factor-1α （HIF-1α）, vascular endothelial cell growth factor （VEGF） and microvessel density （MVD）, and their relationships to the clinicopathologic characteristics of esophageal squamous cell carcinomas （ESCC）. Methods： The expressions of HIF-1α, VEGF and MVD were detected by immunohistochemical method in 45 cases of ESCC, 30 intraepithelial neoplasia and 35 normal esophageal mucosal epithelia tissues. The correlations among the expressions of HIF-1α, VEGF and MVD, and their relationships to the clinicopathologic features of ESCC were analyzed. Results： The rate of positive expression of HIF-1α and VEGF which were 80% and 84% in ESCC were significantly higher than those in intraepithelial neoplasia and normal esophageal mucosal epithelium tissues （P 〈 0.01） and so did the MVD value which was71.10 ±15.02 in ESCC （P 〈 0.01）. The expression of HIF-1α and VEGF were positively correlated with the depth of tumor invasion, lymph node metastasis and TNM staging of ESCC. The expressions of HIF-1α were positively correlated with the expressions of VEGF and the value of MVD. Conclusion： Overexpression of HIF-1α is found in ESCC. HIF-1α may induce the angiogenesis in ESCC by upregulating the transcription of VEGF gene. It may play an important role in the carcinogenesis and aggression in ESCC, HIF-1α, VEGF and MVD may be a useful marker for evaluating the biological behaviors of ESCC.展开更多
Objective:To assess the nuclear factor-erythroid 2-related factor-2(Nrf2)modulatory effect of caffeic acid and protocatechuic acid and determine the anti-tumor activity of these phenolic compounds against Ehrlich asci...Objective:To assess the nuclear factor-erythroid 2-related factor-2(Nrf2)modulatory effect of caffeic acid and protocatechuic acid and determine the anti-tumor activity of these phenolic compounds against Ehrlich ascites carcinoma growth in mice.Methods:Antioxidant activity of protocatechuic acid and caffeic acid was assessed using ferric reducing antioxidant power(FRAP)and 2,2-diphenyl-1-picrylhydrazyl(DPPH).Nrf2 activation potential of phenolic compounds was tested by quantitative realtime polymerase chain reaction,and luciferase complementation reporter assays.In vivo efficacy was tested using the Ehrlich ascites carcinoma model.Results:FRAP and DPPH radical scavenging assays showed that caffeic acid and protocatechuic acid were more potent compared with cinnamic acid and benzoic acid.Luciferase complementation reporter assays identified caffeic acid and protocatechuic acid as the activators of Nrf2.Both caffeic acid and protocatechuic acid upregulated the expression of Nrf2 target genes heme oxygenase-1(HO-1),glutamate-cysteine ligase catalytic subunit(GCLC),and glutamate-cysteine ligase modifier subunit(GCLM)and the activity of NAD(P)H:quinone oxidoreductase 1(NQO1)when tested on HCT-116 cells using a cell-based assay system at 9 h.In addition,intraperitoneal administration of caffeic acid and protocatechuic acid to Ehrlich ascites carcinoma bearing mice suppressed tumor growth and angiogenesis.Conclusions:Caffeic acid and protocatechuic acid can modulate Nrf2 and inhibit Ehrlich ascites carcinoma cells.展开更多
文摘The article ＂Cationic liposome-mediated transfection of CD40 ligand gene inhibits hepatic tumor growth of hepatocellular carcinoma in mice＂ [doi： 10. 1631/jzus.B0820178] by Jiang et al.（2009） in a recent issue of the Journal of Zhejiang University SCIENCE B was highly thought provoking. The authors have clearly demonstrated the efficacy of CD40 ligand gene therapy in inhibiting the growth of hepatocellular carcinomas. The findings of Jiang et al.（2009） are highly important as they further support and corroborate the rapidly expanding role of CD40 ligand gene therapy in the management of systemic malignancies besides hepatocellular carcinomas.
文摘BACKGROUND Mismatch repair deficient/microsatellite instability-high(MMR-D/MSI-H)colorectal cancers(CRCs)possess a distinctive genomic profile that results in a spectrum of phenotypic attributes setting them apart from their mismatch repair proficient(MMR-P)or microsatellite stable(MSS)counterparts.CRCs have several prognostic factors,including stage,tumor differentiation,location,lymphovascular and perineural invasion,tumor budding,tumor infiltrating lymphocytes,lymph node yield(LNY),and lymph node ratio(LNR).AIM To determine the unique phenotypic characteristics of MMR-D/MSI-H CRCs and leverage the conventional wisdom of LNY and LNR with the distinctive characteristics of MMR-D/MSI-H CRCs.METHODS This retrospective analysis involved 223 stage I-III CRC patients who underwent surgical resection without neoadjuvant treatment.Clinical and histological features were obtained from patient records and by re-examining the hematoxylin and eosin-stained slides.MMR/MSI status was evaluated for all patients using either MMR immunohistochemistry or MSI testing.RESULTS Of the 223 patients in our study,87(39.01%)were MMR-D/MSI-H CRCs while 136(60.99%)were MMR-P/MSS CRCs.The MMR-D/MSI-H CRCs exhibited significant statistical differences compared to the MMR-P/MSS CRCs in several factors,including location,stage,tumor budding,lymphovascular and perineural invasion,lymphocytic response,LNY,LNR,and size of uninvolved lymph nodes.LNY and LNR were significantly higher in MMR-D/MSI-H group compared with the MMR-P/MSS group(P=0.003 and P<0.001,respectively).Also,the interquartile range of the largest uninvolved lymph node was 1 cm(0.8 cm-1.2 cm)in MMR-D/MSI-H CRCs compared to 0.7 cm(0.6 cm-0.97 cm)in MMRP/MSS CRCs.The overall survival for the MMR-P/MSS CRC group was 71%at five years,and the MMR-D/MSIH CRC group was 92%at five years(P<0.001).CONCLUSION MMR-D/MSI-H CRCs possess a unique genomic profile that leads to distinct phenotypic characteristics,including an enhanced immune response.This distinctive profile underscores the substantial prognostic and predictive value of MMR-D/MSI-H status in CRC.
文摘AIM： TO examine the immunoreactivity of E-cadherin and four subtypes of catenin family in human hepatocellular carcinomas （HCCs） and to investigate the correlation between expression of E-cadherin/ catenin complex and clinicopathologic parameters of HCC patients. METHODS： An immunohistochemical study for E-cadherin and catenins was performed on 97 formalin-fixed, paraffin-embedded specimens of HCC. RESULTS： Reduced expression of E-cadherin, ^-, 13-, y-catenin and p120 was observed in 69%, 76%, 63%, 71% and 73%, respectively. Both expressions of E-cadherin and catenin components were significantly correlated with tumor grade （P = 0.000）. It showed significant difference between expression of catenin members and tumor stage （P = 0.003, P = 0.017, P = 0.007 and P = 0.000, respectively）. The reduced expression of E-cadherin in HCCs was significantly correlated with intrahepatic metastasis （IM） and capsular invasion （P = 0.008, P = 0.03, respectively）. A close correlation was also observed between the expression of catenins and the tumor size （P = 0.002, P = 0.034, P = 0.016 and P = 0.000, respectively）. In addition, the expression of each catenin was found correlated with IM （P = 0.012, P = 0.049, P =0.026 and P = 0.014, respectively）. No statistically significant difference was observed between the expression level of E-cadherin/catenin complex and lymph node permission, vascular invasion and satellite nodules. Interestingly, only expression of p120 showed correlation with AFP value （P = 0.035）. The expression of E-cadherin was consistent with α-, β-, γ-catenin and p120 expression （P = 0.000）. Finally, the abnormal expression of E-cadherin/catenin complex was significantly associated with patients＇ survival （P = 0.0253, P = 0.0052, P = 0.003, P = 0.0105 and P = 0.0016, respectively）. Nevertheless, no component of E-cadherin/catenin complex was the independent prognostic factor of HCC patients. CONCLUSION： Down-regulated expressions of E-cadherin, catenins and p120 occur frequently in HCCs and contribute to the progression and development of tumor. It may be more exact and valuable to detect the co-expression of E-cadherin/catenin complex than to explore one of them in predicting tumor invasion, metastasis and patient＇s survival.
基金Supported by Chinese Society of Clinical Oncology,No.Y-N2013-014
文摘AIM To provide more information and therapeutic methods about gastric neuroendocrine carcinomas(G-NECs) which occur rarely but are highly malignant and clinically challenging.METHODS We retrospectively analyzed the clinicopathological characteristics, treatments, and prognosis of 43 G-NEC patients at our hospital between January 2007 and December 2014. The diagnosis was based on the 2010 World Health Organization criteria.RESULTS Forty-three G-NECs containing 39 small cell carcinomas and 4 large cell NECs with Ki67 > 60% were included in this study, accounting for only 0.95% of all gastric carcinomas. The median patient age was 62 years (range, 33-82) and the male-to-female ratio was 4.4:1. All patients underwent surgery, including 38 curative resections and 5 palliative resections. Among these 43 patients, nearly half(48.84%) of these tumors were located in the cardiac region of the stomach, regional lymph node metastasis was found in 31 cases(72.09%), and liver metastasis was found in 6 cases(13.95%). Follow-up information was got for 40 patients. Twentythree die of this disease with a median survival of 31 mo(range 1-90). The 1-year, 2-year, 3-year, and 5-year survival rate was 77.50%, 57.04%, 44.51%, and 35.05%, respectively. Survival was better in patients with tumor located in the cardiac region of the stomach, less than 7 lymph nodes metastasis and no liver metastasis. Five patients did not undergo postoperative chemotherapy, and the median survival time for these patients was 15 mo. For the remaining 34 patients who received postoperative chemotherapy, the median survival time was 44 mo and those received etoposide, cisplatin, and Paclitaxel survived the best. One patient with resected liver metastasis who received postoperative Capecitabine plus Oxaliplatin and Paclitaxel systemic chemotherapy plus octreotide LAR(30 mg intramuscularly, every 4 wk, for 2 years) has survived for 74 mo with no recurrence.CONCLUSION G-NECs are mostly nonfunctioning, which lead to a delay in detection. Local and/or distant metastases were noticed in most patients when diagnosed, and they required postoperative medical treatment. Adjuvant etoposide, cisplatin plus Paclitaxel systemic chemotherapy is recommended for these patients.
基金Supported by National Natural Science Foundation of China, No 30371618
文摘AIM: To understand the expression of latent and lytic genes of Epstein-Barr virus (EBV) in EBV-associated gastric carcinoma (EBVaGC) and to explore the relationship between EBV-encoded genes and development of EBVaGC at molecular level, METHODS: One hundred and seventy-two gastric carcinoma tissues and 172 corresponding para-carcinoma tissues were tested for EBV genome by polymerase chain reaction (PCR)-Southern blotting. EBV-encoded small RNA (EBER) 1 of the PCR positive specimens was detected by in situ hybridization (ISH). Gastric carcinomas with positive EBER1 signals were classified as EBVaGCs. RT-PCR and Southern hybridization were applied to the detection of expression of nuclear antigen (EBNA) promoters (Qp, Wp and Cp), EBNA 1 and EBNA 2, latent membrane proteins (LMP) 1, 2A and 2B and lytic genes (immediate early genes BZLF1 and BRLF1, early genes BARF1 and BHRF1, late genes BcLF1 and BLLF1) in EBVaGCs. RESULTS: Eleven EBV positive samples existed in gastric carcinoma tissues (6.39%). No EBV positive sample was found in corresponding para-carcinoma tissues. The difference between EBV positivity in carcinoma tissues and corresponding para-carcinoma tissues was significant (x2 = 9.0909, P = 0.0026). Transcripts of Qp and EBNA1 were detected in all the 11 EBVaGCs, while both Wp and Cp were silent. EBNA2, LMP1 and LMP2B mRNA were absent in all the cases, while LMP2A mRNA was detected in 4 of the 11 cases. Of the 11 EBVaGCs, 7 exhibited BcLFl transcripts and 2 exhibited BHRF1 transcripts. The transcripts of BZLF1 and BARF1 were detected in 5 cases, respectively. No BLLF1 and BRLF mRNA were detected. CONCLUSION: The latent pattern of EBV in gastric carcinoma corresponds to the latency I/II. Some lytic infection genes are expressed in EBVaGCs tissues. BARF1 and BHRF1 genes may play an important role in tumorigenesis of gastric carcinoma.
基金supported by FEDER through the operation POCI-01-0145-FEDER-007746 funded by the Programa Operacional Competitividade e Internacionalizacao–COMPETE2020by National Funds through FCT-Fundacao para a Ciencia e a Tecnologia within CINTESIS,R&D Unit(reference UID/IC/4255/2013)Joana Ribeiro has been granted with a Ph D Scholarship(SFRH/BD/107740/2015)from FCT-Fundacao para Ciencia e Tecnologia
文摘AIM To determine the prevalence of epstein-barr virus(eb V)-associated gastric carcinomas in the North Region of Portugal and to study its clinicopathological characteristics. METHODS We have performed a retrospective study including a total of 179 consecutive patients with gastric cancer(GC) submitted to gastrectomy during 2011 at the Portuguese Oncology Institute of Porto. Clinical and pathological data was collected from individual clinical records and inserted on a database with unique codification. Tumour tissues were collected from the institutional tumour bank. eb V was detected by in situ hybridization for the detection of eb V-encoded small RNAs(ebe Rs) and eb V latent proteins(LMP1 and LMP2 A) were detected by immunohistochemistry.RESULTS The analysis showed that eb V-associated gastric carcinomas(eb Va GC) represents 8.4%(15/179) of all GC cases, with a significant differential distribution among histological types(P < 0.001): 100%(3/3) of medullary carcinomas, 100%(1/1) of adenosquamous carcinoma, 8.7%(8/92) of tubular adenocarcinomas, 8.0%(2/25) of mixed carcinomas and 2%(1/51) in poorly cohesive carcinomas. The analysis revealed a higher predominance of eb Va GC in the upper third and middle(cardia, fundus and body) of the stomach(P = 0.041), a significant lower number of regional lymph nodes invasion(P = 0.025) and a tendency for better prognosis(P = 0.222). eb V latent protein expression revealed that all eb Va GC cases were LMP1-negative, nevertheless 6 cases(40%) expressed LPM2 A, which reveals that these cases show a distinct eb V-Latency profile(latency II-like).CONCLUSION eb Va GC represents 8.4% of all GC in the North Region of Portugal. The eb V-infected patients have specific clinic-pathological features that should be further explored to develop new strategies of management and treatment.
文摘AIM To investigate the role of telomeric association in the development of esophageal cancer. METHODS Using chromosome R banding technique, telomeric association of chromosome in peripheral blood lymphocytes from 16 untreated patients with esophageal squamous cell carcinoma were observed and 16 healthy adults served as controls. RESULTS The telomeric association frequencies of cell and chromosomes were significantly higher than those of controls (x 2=9.56,P<0.01), but its distribution on the chromosome showed no significant difference (x 2=1.01, P>0.05) between the two groups. CONCLUSION Chromosomal instability can be initiated by telomeric associations, and sequential chromosome analysis can aid the understanding of the tumor occurrence and progression.
文摘Neuroendocrine carcinomas(NEC) of the pancreas are defined by a mitotic count > 20 mitoses/10 high power fields and/or Ki67 index > 20%, and included all the tumors previously classified as poorly differentiated endocrine carcinomas. These latter are aggressive malignancies with a high propensity for distant metastases and poor prognosis, and they can be further divided into small- and large-cell subtypes. However in the NEC category are included also neuroendocrine tumors with a well differentiated morphology but ki67 index > 20%. This category is associated with better prognosis and does not significantly respond to cisplatin-based chemotherapy, which represents the gold standard therapeutic approach for poorly differentiated NEC. In this review, the differences between well differentiated and poorly differentiated NEC are discussed considering both pathology, imaging features, treatment and prognostic implications. Diagnostic and therapeutic flowcharts are proposed. The need for a revision of current classification system is stressed being well differentiated NEC a more indolent disease compared to poorly differentiated tumors.
文摘AIM: Metastases from lung cancer to gastrointestinal tract are not rare at postmortem studies but the development of clinically significant symptoms from the gastrointestinal metastases is very unusual. METHODS: Formalin-fixed, paraffin-embedded tissues were cut into 5 urn thick sections and routinely stained with hematoxylin and eosin. Some slides were also stained with Alcian-PAS. Antibodies used were primary antibodies to pancytokeratin, cytokeratin 7, cytokeratin 20, epithelial membrane antigen, vimentin, smooth muscle actin and CD-117. RESULTS: We observed three patients who presented with multiple metastases from large cell bronchial carcinoma to small intestine. Two of them had abdominal symptoms (sudden onset of abdominal pain, constipation and vomiting) and in one case the tumor was incidentally found during autopsy. Microscopically, all tumors showed a same histological pattern and consisted almost exclusively of strands and sheets of poorly cohesive, polymorphic giant cells with scanty, delicate stromas. Few smaller polygonal anaplastic cells dispersed between polymorphic giant cells, were also observed. Immunohistochemistry showed positive staining of the tumor cells with cytokeratin and vimentin. Microscopically and immunohistochemically all metastases had a similar pattern to primary anaplastic carcinoma of the small intestine. CONCLUSION: In patients with small intestine tumors showing anaplastic features, especially with multiple tumors, metastases from large cell bronchial carcinoma should be first excluded, because it seems that they are more common than expected.
基金Supported by Municipal Commission of Health and Family Planning of Shanghai,China(No.20174Y0243 to Liu DJ,No.20154Y0163 to Chen XJ)Cultivating Funds of Renji Hospital,School of Medicine,Shanghai Jiao Tong University,China(No.PYXJS 16-002 to Liu W)
文摘BACKGROUND Recently, more and more studies have demonstrated the pivotal role of programmed death 1/programmed death ligand 1(PD-1/PD-L1) pathway in the immune evasion of tumors from the host immune system. However, the role of PD-1/PD-L1 pathway in gastric neuroendocrine carcinomas(G-NECs) remains unknown.AIM To investigate the expression of PD-1/PD-L1 and role of PD-1/PD-L1 pathway in G-NECs, which occur rarely but are highly malignant and clinically defiant.METHODS We investigated the expression of PD-L1 on tumor cells and PD-1^+, CD8^+, and FOXP3^+ T cell infiltration by immunohistochemistry in 43 resected G-NEC tissue specimens. The copy number alterations of PD-L1 were assessed by qRT-PCR.RESULTS Most of the G-NECs tumor cells exhibited a near-uniform expression pattern of PD-L1, while some showed a tumor-stromal interface enhanced pattern. Of the 43G-NECs, 21(48.8%) were classified as a high PD-L1 expression group, and the high expression of PD-L1 was associated with poor overall survival(OS). The high expression of PD-L1 was correlated with abundant PD-1^+ tumor infiltrating lymphocytes(TILs) instead of CD8^+ TILs and FOXP3^+ regulatory T cells(Tregs).Our analysis also suggested that the infiltration of CD8^+ TILs tended to be a favorable factor for OS, although the difference did not reach the statistical significance(P = 0.065). Meanwhile, PD-L1 was significantly overexpressed in cases with copy number gain as compared with those without.CONCLUSION Our data demonstrated for the first time that high expression of PD-L1 in GNECs is associated with a poor prognosis, while the high expression may be due to the copy number variation of PD-L1 gene or stimulation of TILs. These results provide a basis for the immunotherapy targeting PD-1/PD-L1 pathway in GNECs.
文摘Hepatocellular carcinoma (HCC) is one of the most common cancers in the world. Conventional diagnosis and treatment of this malignancy have been dismal and should be complemented by novel tools. The development and progress of HCC are believed to be caused by the accumulation of genetic changes resulting in altered expression of thousands of cancer-related genes, which can be measured by globe genetic analysis. Gene expression profiling of HCC has been employed to elucidate hepatocarcinogenesis and disclose molecular mechanisms underlying complex clinical features.Identifying phenotype-associated genes/profiles has impacts on current diagnosis and management strategy of HCC. In spite of some pitfalls of this technology and challenges in improving the research process, scrutinous validation of profiling data of HCC combined with other approaches will eventually benefit the patients.
基金Supported by the Deutsche Krebshilfe, No. 70-3065-SchmI
文摘AIM： Tumor angiogenesis has been shown to be promoted by vascular endothelial growth factor （VEGF） via stimulating endothelial cell proliferation, migration, and survival. Blockade of VEGF signaling by different means has been demonstrated to result in reduced tumor growth and suppression of tumor angiogenesis in distinct tumor entities. Here, we tested a recombinant adenovirus, AdsFItl-3, that encodes an antagonistically acting fragment of the VEGF receptor 1 （Fit-l）, for systemic antitumor effects in pre-established subcutaneous CRC tumors in mice.METHODS： Murine colorectal carcinoma cells （CT26） were inoculated subcutaneously into Balb/c mice for in vivo studies. Tumor size and survival were determined. 293 cell line was used for propagation of the adenoviral vectors. Human lung cancer line A549 and human umbilical vein endothelial cells were transfected for in vitro experiments.RESULTS： Infection of tumor cells with AdsFlt1-3 resulted in protein secretion into cell supernatant, demonstrating correct vector function. As expected, the secreted sFlt1-3 protein had no direct effect on CT26 tumor cell proliferation in vitro, but endothelial cell function was inhibited by about 46% as compared to the AdLacZ control in a tube formation assay. When AdsFlt1-3 （5×10^9 PFU/animal） was applied to tumor bearing mice, we found a tumor inhibition by 72% at d 12 after treatment initiation, in spite of these antitumoral effects, the survival time was not improved. According to reduced intratumoral microvessel density in AdsFlt1-3-treated mice, the antitumor mechanism can be attributed to angiostatic vector effects. We did not detect increased systemic VEGF levels after AdsFlt1-3 treatment and liver toxicity was low as judged by serum alanine aminotransferase determination.CONCLUSION： In this study we confirmed the value of a systemic administration of AdsFItl-3 to block VEGF signaling as antitumor therapy in an experimental metastatic colorectal carcinoma model in mice.
文摘Purpose: To evaluate outcome and toxicity after carbon ion radiotherapy (RT) in skin carcinomas. Patients and Methods: Between November 2006 to September 2008,
基金Supported by a grant from the Application Technology Research and Development Project Foundation in Rizhao City(No.2060402)
文摘Objective： The purpose of this study was to study the clinical and pathological characteristics of breast intraductal proliferative lesions （IDPLs） and associated with invasive breast cancer. Methods： We reviewed 327 cases of breast intra- ductal proliferative lesions including 53 cases of usual ductal hyperplasia, 57 cases of atypical ductal hyperplasia, 89 cases of ductal carcinoma in situ, and 128 cases coexist with invasive ductal carcinomas. Cases of pure invasive cancer without intraductal proliferative lesions were excluded. The mult IDPLs biological parameters including the express of ER, PR, HER2, HIF-lo and Ki-67 detected by immunohistochemistry S-P method （n = 327） and the levels of CA153, TSGF, CA125 and CEA both in nipple discharge and serum （n = 179） measured with Electrochemiluminescence method and their relationship were studied, and 30 cases of normal pregnant women were compared with. Results： A single histologic subtype was present in 49.85% （163/327） of the cases, two subtypes in 33.03% （108/327）, and three in 17.13% （56/327）. The most common subtypes present were cribriform （43.12%, 141/327） and solid （38.53%, 126/327）, while the comedo （16.35%, 54/327）, and micropapillary （12.84%, 42/327） subtypes were less common. Comedo and solid were frequently found together for coexpres- sion as were micropapillary and papillary subtypes. However, Comedo subtype was much less likely to be found with papillary, cribriform or micropapillary subtypes. Additionally, comedo subtypes tend to be hormone receptor negative, Her2 positive and high-grade while the cribriform and solid subtype tends to be hormone receptor positive, Her2 negative and low grade. Papil- lary subtype was least likely to be associated with an invasive cancer. Furthermore, the nipple discharge and serum levels of CA153, TSGF, CA125 and CEA in coexist with invasive ductal carcinomas patients were significantly higher than those in the benign breast disease （pure intraductal proliferative lesions） and normal pregnant women （P 〈 0.01）. Additionally, the levels of CA153, TSGF, CA125 and CEA in nipple discharge were significantly higher than in the serum （P 〈 0.01）, and had a positive correlation with the Ki-67, grade, clinical stage, lymph node metastasis and tumor recurrence （P 〈 0.05）, and negative correla- tion with the level of ER and PR （P 〈 0.05）. The sensitivity of the four serum tumor markers in combination was only 69.77%, in contrast, the combined detection both in discharge and serum was 97.67%, and the negative predictive value was 99.03%. The sensitivity of combined detection both in nipple discharge and serum were significantly higher than other detection （P 〈 0.05）. Conclusion： IDPLs often present more than one histologic subtype and the most common subtypes are cribriform and solid, while comedo and micropapillary subtypes are less common. Our results suggest that the levels of CA153, TSGF, CA125 and CEA in nipple discharge were significantly higher than those in the serum, and is associated with HIF-le. The aberration of HIF-la may play a key role during oncogenesis and promote breast cellular transformation into malignancy, a finding useful for further understanding of tumorigenesis. Nipple discharge can be the earliest presenting symptom of breast cancer. The dynamic combined detection of the four tumor markers both in nipple discharge and serum are helpful to the stratification of preoperative patients and benefit to better prewarning markers for monitoring their recurrence and metastasis and clinical staging of tumors in clinic, but cannot increase the sensitivity of judging the patients with early breast cancer.
基金supported by the internal research grant from China-Japan Friendship Hospital,Beijing,China(Grant No.2016-1QN-9)。
文摘Currently,18F-FDG coincidence SPECT(Co-SPECT)/CT scan still serves as an important tool for diagnosis,staging,and evaluation of cancer treatment in developing countries.We implemented full physical corrections(FPC) to Co-SPECT(quantitative Co-SPECT) to improve the image resolution and contrast along with the capability for image quantitation.FPC included attenuation,scatter,resolution recovery,and noise reduction.A standard NEMA phantom filled with 10:1 F-18 activity concentration ratio in spheres and background was utilized to evaluate image performance.Subsequently,15 patients with histologically confirmed thoracic carcinomas were included to undergo a 18 F-FDG Co-SPECT/CT scan followed by a 18 F-FDG PET/CT scan.Functional parameters as SUVmax,SUVmean,SULpeak,and MTV from both quantitative Co-SPECT and PET were analyzed.Image resolution of Co-SPECT for NEMA phantom was improved to reveal the smallest sphere from a diameter of 28 mm to 22 mm(17 mm for PET).The image contrast was enhanced from 1.7 to 6.32(6.69 for PET) with slightly degraded uniformity in background(3.1% vs.6.7%)(5.6% for PET).Patients’ SUVmax,SUVmean,SULpeak,and MTV measured from quantitative Co-SPECT were overall highly correlated with those from PET(r=0.82-0.88).Adjustment of the threshold of SUVmax and SUV to determine SUVmean and MTV did not further change the correlations with PET(r=0.81-0.88).Adding full physical corrections to Co-SPECT images can significantly improve image resolution and contrast to reveal smaller tumor lesions along with the capability to quantify functional parameters like PET/CT.
基金research grants fromthe Special Grant for Human Genomics Program ofChinese Academy of Sciences and the Special Fundsfor Ma
文摘Asip is a mammalian homologue of polarity protein Par-3 of Caenorhabditis elegans and Bazooka of Drosophila melanogaster. Asip/Par-3/Bazooka are PDZ-motif containing proteins that localize asymmetrically to the cell periphery and play a pivotal role in cell polarity and asymmetric cell division. In the present study, we have cloned human asip cDNA and its splicing variants by 5’-RACE and RT-PCR using candidate human EST clones which have a high homology to rat asip cDNA. The full-length cDNA of human asip encodes a 1,353 aa protein exhibiting 88% similarity to the rat one. Human asip is a single copy gene consisting of at least 26 exons and localizing in human chromosome 10, band p11.2, with some extraordinarily long introns. All exon/intron boundary nucleotides conform to the "gt-ag" rule. Three main transcripts were detected by Northern blot analysis, and at least five variants, from alternative splicing and polyadenylation, have been identified by RT-PCR and liver cDNA library screening. Exon 17b deleted asip mRNAs expressed ubiquitously in normal human tissues, including liver, on RT-PCR analysis. However, they were absent from most human liver cancer cell lines examined. More interestingly, the expression of exon 1 7b deleted variants was down regulated in 52.6% (10/19) clinic specimens of human hepatocellular carcinomas (HCCs), compared with the surrounding nontumorous liver tissues from the same patients. The presence of various splicing transcripts, the variation of their distribution among different tissues and cells, and their differential expressions in human HCCs suggest that human Asip isoforms may function in different context.
文摘Objective： We compared positron emission tomography （PET） using 18-fluoro-2-deoxyglucose （FDG）, enhanced computed tomography （CT） and magnetic resonance imaging （MRI） in detecting skull base invasion of nasopharyngeal carcinomas （NPC） and to evaluate the value of these three methods in determining the existence of skull base invasion of nasopharyngeal carcinomas. Methods： The images of enhanced CT, MRI and PET-CT scans, performed at intervals -〈 20 days on 57 NPC patients from July 2004 to February 2007, were selected and reviewed. The endpoints of the comparison were sensitivity, specificity, accuracy, positive predictive value （PPV） and negative predictive value （NPV） of Enhanced CT, MRI and PET-CT, based on histopathologic findings or clinical imaging follow-up for at least 6 months. Results： For detecting skull base invasion of NPC, the sensitivity of enhanced CT, MRI and PET-CT were 68.18%, 84.09%, 97.67% respectively; speci- ficity were 76.92%, 69.23%, 57.14% respectively; accuracy were 70.18%, 80.7%, 87.72% respectively; PPV were 90.9%, 90.24%, 87.5% respectively; NPV were 41.67%, 56.25%, 88.89% respectively. Conclusion： PET-CT has obvious advantages in sensitivity over CT （P 〈 0.05） and MRI, better than the two methods in accuracy and NPV and may be more valuable for new patients in detecting skull base invasion of NPC patients.
文摘OBJECTIVE: To study the sonographic features and patterns of cystic renal carcinomas. METHODS: Thirteen cases of cystic renal carcinoma confirmed by operation and pathology were examined by ultrasonography, and the cystic walls, septa and solid mural nodules were studied. RESULTS: Solid mural nodules of some cases and irregular thickening of the cystic walls and septa were characteristic findings for the ultrasonic diagnosis of cystic renal carcinomas. According to their pathologic mechanisms and sonographic features, cystic renal carcinomas were classified into 3 patterns: unilocular cystic mass, multiloculated cystic mass and cystic-solid mass. CONCLUSIONS: Typical cystic renal carcinomas can be well diagnosed, while atypical cases may be misdiagnosed as benign renal cysts by ultrasonography. Color Doppler ultrasonography and needle aspiration guided by ultrasonography are helpful in the diagnosis of these atypical cases.
基金Supported by a grant from the Natural Sciences Foundation of Anhui Province (No.2006KJ134C)
文摘Objective： To investigate the correlations among the expressions of hypoxia-inducible factor-1α （HIF-1α）, vascular endothelial cell growth factor （VEGF） and microvessel density （MVD）, and their relationships to the clinicopathologic characteristics of esophageal squamous cell carcinomas （ESCC）. Methods： The expressions of HIF-1α, VEGF and MVD were detected by immunohistochemical method in 45 cases of ESCC, 30 intraepithelial neoplasia and 35 normal esophageal mucosal epithelia tissues. The correlations among the expressions of HIF-1α, VEGF and MVD, and their relationships to the clinicopathologic features of ESCC were analyzed. Results： The rate of positive expression of HIF-1α and VEGF which were 80% and 84% in ESCC were significantly higher than those in intraepithelial neoplasia and normal esophageal mucosal epithelium tissues （P 〈 0.01） and so did the MVD value which was71.10 ±15.02 in ESCC （P 〈 0.01）. The expression of HIF-1α and VEGF were positively correlated with the depth of tumor invasion, lymph node metastasis and TNM staging of ESCC. The expressions of HIF-1α were positively correlated with the expressions of VEGF and the value of MVD. Conclusion： Overexpression of HIF-1α is found in ESCC. HIF-1α may induce the angiogenesis in ESCC by upregulating the transcription of VEGF gene. It may play an important role in the carcinogenesis and aggression in ESCC, HIF-1α, VEGF and MVD may be a useful marker for evaluating the biological behaviors of ESCC.
文摘Objective:To assess the nuclear factor-erythroid 2-related factor-2(Nrf2)modulatory effect of caffeic acid and protocatechuic acid and determine the anti-tumor activity of these phenolic compounds against Ehrlich ascites carcinoma growth in mice.Methods:Antioxidant activity of protocatechuic acid and caffeic acid was assessed using ferric reducing antioxidant power(FRAP)and 2,2-diphenyl-1-picrylhydrazyl(DPPH).Nrf2 activation potential of phenolic compounds was tested by quantitative realtime polymerase chain reaction,and luciferase complementation reporter assays.In vivo efficacy was tested using the Ehrlich ascites carcinoma model.Results:FRAP and DPPH radical scavenging assays showed that caffeic acid and protocatechuic acid were more potent compared with cinnamic acid and benzoic acid.Luciferase complementation reporter assays identified caffeic acid and protocatechuic acid as the activators of Nrf2.Both caffeic acid and protocatechuic acid upregulated the expression of Nrf2 target genes heme oxygenase-1(HO-1),glutamate-cysteine ligase catalytic subunit(GCLC),and glutamate-cysteine ligase modifier subunit(GCLM)and the activity of NAD(P)H:quinone oxidoreductase 1(NQO1)when tested on HCT-116 cells using a cell-based assay system at 9 h.In addition,intraperitoneal administration of caffeic acid and protocatechuic acid to Ehrlich ascites carcinoma bearing mice suppressed tumor growth and angiogenesis.Conclusions:Caffeic acid and protocatechuic acid can modulate Nrf2 and inhibit Ehrlich ascites carcinoma cells.
