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Genetic factors that predict response and failure of biologic therapy in inflammatory bowel disease
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作者 Milena Peruhova Daniela Stoyanova +3 位作者 Dimitrina Georgieva Miteva Meglena Kitanova Milko Bozhidarov Mirchev Tsvetelina Velikova 《World Journal of Experimental Medicine》 2025年第1期11-23,共13页
Inflammatory bowel disease(IBD)represents a significant disease burden marked by chronic inflammation and complications that adversely affect patients’quality of life.Effective diagnostic strategies involve clinical ... Inflammatory bowel disease(IBD)represents a significant disease burden marked by chronic inflammation and complications that adversely affect patients’quality of life.Effective diagnostic strategies involve clinical assessments,endoscopic evaluations,imaging studies,and biomarker testing,where early diagnosis is essential for effective management and prevention of long-term complications,highlighting the need for continual advancements in diagnostic methods.The intricate interplay between genetic factors and the outcomes of biological therapy is of critical importance.Unraveling the genetic determinants that influence responses and failures to biological therapy holds significant promise for optimizing treatment strategies for patients with IBD on biologics.Through an indepth examination of current literature,this review article synthesizes critical genetic markers associated with therapeutic efficacy and resistance in IBD.Understanding these genetic actors paves the way for personalized approaches,informing clinicians on predicting,tailoring,and enhancing the effectiveness of biological therapies for improved outcomes in patients with IBD. 展开更多
关键词 Inflammatory bowel disease Genetic predictors Inflammatory bowel disease treatment Biologic therapy Biologic therapy response Genetic markers in inflammatory bowel disease Inflammatory bowel disease treatment failure PHARMACOGENOMICS Biologic therapy efficacy Genetic variability
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Applications of time series analysis in epidemiology: Literature review and our experience during COVID-19 pandemic 被引量:2
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作者 Latchezar Tomov Lyubomir Chervenkov +2 位作者 Dimitrina Georgieva Miteva Hristiana Batselova TsvetelinaVelikova 《World Journal of Clinical Cases》 SCIE 2023年第29期6974-6983,共10页
Time series analysis is a valuable tool in epidemiology that complements the classical epidemiological models in two different ways:Prediction and forecast.Prediction is related to explaining past and current data bas... Time series analysis is a valuable tool in epidemiology that complements the classical epidemiological models in two different ways:Prediction and forecast.Prediction is related to explaining past and current data based on various internal and external influences that may or may not have a causative role.Forecasting is an exploration of the possible future values based on the predictive ability of the model and hypothesized future values of the external and/or internal influences.The time series analysis approach has the advantage of being easier to use(in the cases of more straightforward and linear models such as Auto-Regressive Integrated Moving Average).Still,it is limited in forecasting time,unlike the classical models such as Susceptible-Exposed-Infectious-Removed.Its applicability in forecasting comes from its better accuracy for short-term prediction.In its basic form,it does not assume much theoretical knowledge of the mechanisms of spreading and mutating pathogens or the reaction of people and regulatory structures(governments,companies,etc.).Instead,it estimates from the data directly.Its predictive ability allows testing hypotheses for different factors that positively or negatively contribute to the pandemic spread;be it school closures,emerging variants,etc.It can be used in mortality or hospital risk estimation from new cases,seroprevalence studies,assessing properties of emerging variants,and estimating excess mortality and its relationship with a pandemic. 展开更多
关键词 Time series analysis EPIDEMIOLOGY COVID-19 PANDEMIC Auto-regressive integrated moving average Excess mortality SEROPREVALENCE
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Protective Effect of Ozone against Hemiscorpius lepturus Envenomation in Mice 被引量:1
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作者 Parvaneh Naserzadeh Farshad Shahi +5 位作者 Delavar Shahbazzadeh Mostafa Ghanei Khadijeh Ashtari Yoones Panahi Mir-Jamal Hosseini Morteza Izadi 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2017年第8期581-590,共10页
Objective Scorpion (Hemiscorpius lepturus) stings are a public health concern in Iran, particularly in south and southwestern regions of Iran. The gold standard for the treatment of a scorpion sting is anti-venom th... Objective Scorpion (Hemiscorpius lepturus) stings are a public health concern in Iran, particularly in south and southwestern regions of Iran. The gold standard for the treatment of a scorpion sting is anti-venom therapy. However, immunotherapy can have serious side effects, such as anaphylactic shock (which can sometimes even lead to death). The aim of the current study was to demonstrate the protective effect of ozone against toxicity induced by Hemiscorpius lepturus (H. lepturus) venom in mice. Methods Eight hours after the injection of ozone to the experimental design groups, the male mice were decapitated and mitochondria were isolated from five different tissues (liver, kidney, heart, brain, and spinal cord) using differential ultracentrifugation. Then, assessment of mitochondrial parameters including mitochondrial reactive oxidative species (ROS) production, mitochondrial membrane potential (MMP), ATP level, and the release of cytochrome c from the mitochondria was performed. Results Our results showed that H. lepturus venom-induced oxidative stress is related to ROS production and MMP collapse, which is correlated with cytochrome c release and ATP depletion, indicating the predisposition to the cell death signaling. Conclusion In general, ozone therapy in moderate dose can be considered as clinically effective for the treatment of H. lepturus sting as a protective and antioxidant agent. 展开更多
关键词 Hemiscorpius lepturus VENOM O3/O2 mixture (ozone) Oxidative stress
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Controversies regarding transplantation of mesenchymal stem cells
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作者 Tsvetelina Velikova Tereza Dekova Dimitrina Georgieva Miteva 《World Journal of Transplantation》 2024年第2期48-61,共14页
Mesenchymal stem cells(MSCs)have tantalized regenerative medicine with their therapeutic potential,yet a cloud of controversies looms over their clinical tran-splantation.This comprehensive review navigates the intric... Mesenchymal stem cells(MSCs)have tantalized regenerative medicine with their therapeutic potential,yet a cloud of controversies looms over their clinical tran-splantation.This comprehensive review navigates the intricate landscape of MSC controversies,drawing upon 15 years of clinical experience and research.We delve into the fundamental properties of MSCs,exploring their unique immuno-modulatory capabilities and surface markers.The heart of our inquiry lies in the controversial applications of MSC transplantation,including the perennial debate between autologous and allogeneic sources,concerns about efficacy,and lingering safety apprehensions.Moreover,we unravel the enigmatic mechanisms surro-unding MSC transplantation,such as homing,integration,and the delicate balance between differentiation and paracrine effects.We also assess the current status of clinical trials and the ever-evolving regulatory landscape.As we peer into the future,we examine emerging trends,envisioning personalized medicine and innovative delivery methods.Our review provides a balanced and informed perspective on the controversies,offering readers a clear understanding of the complexities,challenges,and potential solutions in MSC transplantation. 展开更多
关键词 Mesenchymal stem cells Transplantation controversies Regenerative medicine Autoimmune diseases Chronic inflammatory illnesses Tumor growth METASTASIS Therapeutic potential Clinical use of mesenchymal stem cell
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Future of prostate imaging:Artificial intelligence in assessing prostatic magnetic resonance imaging
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作者 Lyubomir Chervenkov Nikolay Sirakov +2 位作者 Gancho Kostov Tsvetelina Velikova George Hadjidekov 《World Journal of Radiology》 2023年第5期136-145,共10页
Prostate cancer(Pca;adenocarcinoma)is one of the most common cancers in adult males and one of the leading causes of death in both men and women.The diagnosis of Pca requires substantial experience,and even then the l... Prostate cancer(Pca;adenocarcinoma)is one of the most common cancers in adult males and one of the leading causes of death in both men and women.The diagnosis of Pca requires substantial experience,and even then the lesions can be difficult to detect.Moreover,although the diagnostic approach for this disease has improved significantly with the advent of multiparametric magnetic resonance,that technology has certain unresolved limitations.In recent years artificial intelligence(AI)has been introduced to the field of radiology,providing new software solutions for prostate diagnostics.Precise mapping of the prostate has become possible through AI and this has greatly improved the accuracy of biopsy.AI has also allowed for certain suspicious lesions to be attributed to a given group according to the Prostate Imaging-Reporting&Data System classification.Finally,AI has facilitated the combination of data obtained from clinical,laboratory(prostate-specific antigen),imaging(magnetic resonance),and biopsy examinations,and in this way new regularities can be found which at the moment remain hidden.Further evolution of AI in this field is inevitable and it is almost certain to significantly expand the efficacy,accuracy and efficiency of diagnosis and treatment of Pca. 展开更多
关键词 Artificial intelligence Deep learning Machine learning Multiparametric magnetic resonance imaging Prostate cancer Quantitative imaging
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Pig meniscus single-cell sequencing reveals highly active red zone chondrocyte populations involved in stemness maintenance and vascularization development
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作者 Monika MANKOWSKA Monika STEFANSKA +6 位作者 Anna Maria MLECZKO Katarzyna SARAD Witold KOT Lukasz KRYCH Julia Anna SEMBA Eric Lars-Helge LINDBERG Jakub Dalibor RYBKA 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 2025年第7期675-693,共19页
Meniscus injuries are widespread and the available treatments do not offer enough healing potential.Here,we provide critical support for using pigs as a biological model for meniscal degeneration and the development o... Meniscus injuries are widespread and the available treatments do not offer enough healing potential.Here,we provide critical support for using pigs as a biological model for meniscal degeneration and the development of cutting-edge therapies in orthopedics.We present a single-cell transcriptome atlas of the meniscus,consisting of cell clusters corresponding to four major cell types:chondrocytes,endothelial cells,smooth muscle cells,and immune cells.Five distinct chondrocyte subclusters(CH0–CH4)were annotated,of which only one was widespread in both the red and white zones,indicating a major difference in the cellular makeup of the zones.Subclusters distinct to the white zone appear responsible for cartilage-specific matrix deposition and protection against adverse microenvironmental factors,while those in the red zone exhibit characteristics of mesenchymal stem cells and are more likely to proliferate and migrate.Additionally,they induce remodeling actions in other chondrocyte subclusters and promote the proliferation and maturation of endothelial cells,inducing healing and vascularization processes.Considering that they have substantial remodeling capabilities,these subclusters should be of great interest for tissue engineering studies.We also show that the cellular makeup of the pig meniscus is comparable to that of humans,which supports the use of pigs as a model in orthopedic therapy development. 展开更多
关键词 Single-cell sequencing Transcriptome atlas MENISCUS CHONDROCYTE Pig model Orthopedic
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Forkhead Box q1 promotes invasion and metastasis in colorectal cancer by activating the epidermal growth factor receptor pathway 被引量:1
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作者 Jin-Jin Zhang Chang-Xiong Cao +5 位作者 Li-Lan Wan Wen Zhang Zhong-Jiang Liu Jin-Li Wang Qiang Guo Hui Tang 《World Journal of Gastroenterology》 SCIE CAS 2022年第17期1781-1797,共17页
BACKGROUND Colorectal cancer(CRC)is an extremely malignant tumor with a high mortality rate.Little is known about the mechanism by which forkhead Box q1(FOXQ1)causes CRC invasion and metastasis through the epidermal g... BACKGROUND Colorectal cancer(CRC)is an extremely malignant tumor with a high mortality rate.Little is known about the mechanism by which forkhead Box q1(FOXQ1)causes CRC invasion and metastasis through the epidermal growth factor receptor(EGFR)pathway.AIM To illuminate the mechanism by which FOXQ1 promotes the invasion and metastasis of CRC by activating the heparin binding epidermal growth factor(HB-EGF)/EGFR pathway.METHODS We investigated the differential expression and prognosis of FOXQ1 and HB-EGF in CRC using the Gene Expression Profiling Interactive Analysis(GEPIA)website(http://gepia.cancer-pku.cn/index.html).Quantitative real-time polymerase chain reaction(qRT-PCR)and Western blotting were used to detect the expression of FOXQ1 and HB-EGF in cell lines and tissues,and we constructed a stable lowexpressing FOXQ1 cell line and verified it with the above method.The expression changes of membrane-bound HB-EGF(proHB-EGF)and soluble HB-EGF(sHB-EGF)in the lowexpressing FOXQ1 cell line were detected by flow cytometry and ELISA.Western blotting was used to detect changes in the expression levels of HB-EGF and EGFR pathway-related downstream genes when exogenous recombinant human HB-EGF was added to FOXQ1 knockdown cells.Proliferation experiments,transwell migration experiments,and scratch experiments were carried out to determine the mechanism by which FOXQ1 activates the EGFR signaling pathway through HB-EGF,and then to evaluate the clinical relevance of FOXQ1 and HB-EGF.RESULTS GEPIA showed that the expression of FOXQ1 in CRC tissues was relatively high and was related to a lower overall survival rate.PCR array results showed that FOXQ1 is related to the HB-EGF and EGFR pathways.Knockdown of FOXQ1 suppressed the expression of HB-EGF,and led to a decrease in EGFR and its downstream genes AKT,RAF,KRAS expression levels.After knockdown of FOXQ1 in CRC cell lines,cell proliferation,migration and invasion were attenuated.Adding HB-EGF restored the migration and invasion ability of CRC,but not the cell proliferation ability.Kaplan–Meier survival analysis results showed that the combination of FOXQ1 and HB-EGF may serve to predict CRC survival.CONCLUSION Based on these collective data,we propose that FOXQ1 promotes the invasion and metastasis of CRC via the HB-EGF/EGFR pathway. 展开更多
关键词 Colorectal cancer Forkhead Box Q1 Heparin binding epidermal growth factor Epidermal growth factor receptor pathway Migration Invasion
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Breast cancer imaging-clinical experience with two-dimensionalshear wave elastography:A retrospective study
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作者 Lyubomir Chervenkov Aleksandar Georgiev +1 位作者 Mladen Doykov Tsvetelina Velikova 《World Journal of Radiology》 2024年第10期528-536,共9页
BACKGROUND Breast cancer morbidity has been increasing worldwide,but treatments are improving.The therapeutic response depends on the stage at which the disease is diagnosed.Therefore,early diagnosis has never been mo... BACKGROUND Breast cancer morbidity has been increasing worldwide,but treatments are improving.The therapeutic response depends on the stage at which the disease is diagnosed.Therefore,early diagnosis has never been more essential for successful treatment and a reduction in mortality rates.Radiology plays a pivotal role in cancer detection,and advances in ultrasound(US)palpation have shown promising results for breast cancer imaging.The addition of two-dimensional-shear wave elastography(2D-SWE)US in the routine breast imaging exam can increase early cancer detection and promote better surveillance.AIM To evaluate the clinical applications of 2D-SWE US in breast cancer detection and its combination with other imaging modalities.METHODS The 200 consecutive female patients aged 50-80 were examined to evaluate palpable breast lesions.All patients underwent mammography,bright mode(B-mode)US,and 2D-SWE followed by US-guided biopsy in two consecutive sessions.RESULTS Combining B-mode and shear wave US imaging with X-ray mammography revealed 100%of the suspicious lesions,resulting in greater sensitivity,specificity,and negative predictive value.The result improves compared to either B-mode or 2D-SWE alone(P=0.02).CONCLUSION Combining 2D-SWE with conventional US and X-ray techniques improves the chance of early cancer detection.Including 2D-SWE in regular breast imaging routines can reduce the need for biopsies and improve the chance of early cancer detection and survivability with the proper line of therapy. 展开更多
关键词 Breast cancer Two-dimensional-shear wave elastography ULTRASOUND MAMMOGRAPHY Bright mode
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Coincidence of three solid tumors in a patient with multiple myeloma
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作者 Muzaffer Keklik Serdar Sivgin +10 位作者 Kemal Deniz Halit Karaca Olgun Kontas Suleyman Balkanli Celalettin Eroglu Ummuhan Abdulrezzak Gulfugan Kuzu Leylagul Kaynar Mustafa Cetin Ali Unal Bulent Eser 《Chinese Medical Journal》 SCIE CAS CSCD 2013年第6期1186-1187,共2页
Multiple primary cancers (MPC) are specific .malignant tumors type, manifesting as more than one primary tumor diagnosed in the same patient, either simultaneously or sequentially. The diagnostic criteria include: ... Multiple primary cancers (MPC) are specific .malignant tumors type, manifesting as more than one primary tumor diagnosed in the same patient, either simultaneously or sequentially. The diagnostic criteria include: the cancer must be clearly malignant as determined by histological evaluation; each cancer must be geographically separate and distinct; 展开更多
关键词 colon cancer lung cancer multiple myeloma multiple primary cancer
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