BACKGROUND Diffusion-weighted magnetic resonance imaging has shown promise in the detection and quantification of hepatic fibrosis. In addition, the liver has numerous endogenous micro-RNAs(miRs) that play important r...BACKGROUND Diffusion-weighted magnetic resonance imaging has shown promise in the detection and quantification of hepatic fibrosis. In addition, the liver has numerous endogenous micro-RNAs(miRs) that play important roles in the regulation of biological processes such as cell proliferation and hepatic fibrosis.AIM To assess diffusion-weighted magnetic resonance imaging and miRs in diagnosing and staging hepatic fibrosis in patients with chronic hepatitis C.METHODS This prospective study included 208 patients and 82 age-and sex-matched controls who underwent diffusion-weighted magnetic resonance imaging of the abdomen, miR profiling, and liver biopsy. Pathological scoring was classified according to the METAVIR scoring system. The apparent diffusion coefficient (ADC) and miR were calculated and correlated with pathological scoring.RESULTS The ADC value decreased significantly with the progression of fibrosis, from controls(F0) to patients with early fibrosis(F1 and F2) to those with late fibrosis(F3 and F4)(median 1.92, 1.53, and 1.25 × 10^(-3) mm^2/s, respectively)(P = 0.001).The cut-off ADC value used to differentiate patients from controls was 1.83 × 10^(-3) mm^2/s with an area under the curve(AUC) of 0.992. Combining ADC and miR-200 b revealed the highest AUC(0.995) for differentiating patients from controls with an accuracy of 96.9%. The cut-off ADC used to differentiate early fibrosis from late fibrosis was 1.54 × 10^(-3) mm^2/s with an AUC of 0.866. The combination of ADC and miR-200 b revealed the best AUC(0.925) for differentiating early fibrosis from late fibrosis with an accuracy of 80.2%. The ADC correlated with miR-200 b(r =-0.61, P = 0.001), miR-21(r =-0.62, P = 0.001), and miR-29(r = 0.52,P = 0.001).CONCLUSION Combining ADC and miRs offers an alternative surrogate non-invasive diagnostic tool for diagnosing and staging hepatic fibrosis in patients with chronic hepatitis C.展开更多
Breast cancer(BC) is the most frequent type of non skin cancer among women and a major leading cause of cancer-related deaths in Western countries. It is substantial to discover novel biomarkers with diagnostic, progn...Breast cancer(BC) is the most frequent type of non skin cancer among women and a major leading cause of cancer-related deaths in Western countries. It is substantial to discover novel biomarkers with diagnostic, prognostic or predictive usefulness as well as therapeutic value for BC. Micro-RNAs(miR NAs) belong to a novel class of endogenous interfering RNAs that play a crucial role in post transcriptional gene silencing through m RNA targeting and, thus, are involved in many biological processes encompassing apoptosis,cell-cycle control, cell proliferation, DNA repair, immunity, metabolism, stress, aging, etc. Mi RNAs exert their action mainly in a tumor suppressive or oncogenic manner. The specific aberrant expression patterns of miR NAs in BC that are detected with the use of highthroughput technologies reflect their key role in cancer initiation, progression, migration, invasion and metastasis. The detection of circulating extracellular miR NAs in plasma of BC patients may provide novel, non-invasive biomarkers in favor of BC diagnosis and prognosis and,at the same time, accumulating evidence has underscored the possible contribution of miR NAs as valuable biomarkers to predict response to chemotherapy or radiotherapy. Data from in vitro and in vivo studies on BC have revealed promising therapeutic approaches via mi RNA delivery and mi RNA inhibition. The purpose of this review is to explore the ontological role of miR NAs in BC etiopathogenesis as well as to highlight their potential, not only as non-invasive circulating biomarkers with diagnostic and prognostic significance, but also as treatment response predictors and therapeutic targets aiding BC management.展开更多
Background Mesenchymal stem cells(MSC)constitute an important repair system,but may be impaired by exposure to cardiovascular risk factors.Consequently,adipose tissue-derived MSCs from pigs with the metabolic syndrome...Background Mesenchymal stem cells(MSC)constitute an important repair system,but may be impaired by exposure to cardiovascular risk factors.Consequently,adipose tissue-derived MSCs from pigs with the metabolic syndrome(Met S)show decreased vitality.A growing number of micro RNAs(mi RNAs)are recognized as key modulators of senescence,but their role in regulating senescence in MSC in Mets is unclear.We tested the hypothesis that Met S upregulates in MSC expression of mi RNAs that can serve as post-transcriptional regulators of senescence-associated(SA)genes.Methods MSCs were collected from swine abdominal adipose tissue after 16 weeks of Lean or Obese diet(n=6 each).Next-generation mi RNA sequencing(mi RNA-seq)was performed to identify mi RNAs up-or down-regulated in Met S-MSC compare to Lean-MSCs.Functional pathway analysis of SA genes targeted by mi RNAs was performed using gene ontology analysis.MSC senescence was evaluated by p16 and p21 immunoreactivity,H2AX protein expression,and SA-beta-Galactosidase activity.In addition,gene expression of p16,p21,MAPK3,and MAPK14 was studied after inhibition of SA-mi R-27b.Results Senescence biomarkers were significantly elevated in Met S MSC.We found the 7 upregulated mi RNAs,including mi R-27b,and 3 downregulated mi RNAs in Met S-MSCs,which regulate 35 SA genes,particularly MAPK signaling.Inhibition of mi R-27b in cultured MSC downregulated p16 and MARP3 genes.Conclusions Met S modulate MSC expression of SA-mi RNAs that may play the role in modulating their senescence,and the p16 pathway in Met S-MSCs senescence is the primary pathway.展开更多
目的探究下肢动脉硬化闭塞症(ASO)患者血清miR-150和miR-155水平表达对支架植入术再狭窄(ISR)的预测价值。方法选取2020年3月~2022年6月期间在德阳市人民医院接受支架植入治疗的108例ASO患者,根据其术后一年是否发生ISR,分为发生ISR组(n...目的探究下肢动脉硬化闭塞症(ASO)患者血清miR-150和miR-155水平表达对支架植入术再狭窄(ISR)的预测价值。方法选取2020年3月~2022年6月期间在德阳市人民医院接受支架植入治疗的108例ASO患者,根据其术后一年是否发生ISR,分为发生ISR组(n=42)和未发生ISR组(n=66)。实时荧光定量聚合酶链式反应(qRT-PCR)检测患者血清中miR-150和miR-155的相对表达水平;采用Pearson相关性分析血清miR-150,miR-155水平与低密度脂蛋白-胆固醇(LDL-C)、超敏C反应蛋白(hs-CRP)的相关性;采用多因素Logistic回归分析影响ASO患者发生ISR的因素;采用受试者工作特征(ROC)曲线分析血清miR-150,miR-155水平对ASO患者发生ISR的预测价值。结果与未发生ISR组相比,发生ISR组血清miR-150(0.65±0.16 vs 1.01±0.09)水平显著降低,miR-155(1.68±0.39 vs 1.02±0.11),LDL-C(2.85±0.76 mmol/L vs 2.21±0.62mmol/L),hs-CRP(2.36±0.47 mg/L vs 1.82±0.36mg/L)水平显著升高,差异具有统计学意义(t=4.785~14.957,均P<0.05)。经Pearson相关性分析显示,血清miR-150与LDL-C,hs-CRP水平呈显著负相关(r=-0.465,-0.532,均P<0.05),血清miR-155与LDL-C,hs-CRP水平呈显著正相关(r=0.453,0.481,均P<0.05)。多因素Logistic回归分析显示,血清miR-150是影响ASO患者发生ISR的保护因素,血清miR-155,LDL-C和hs-CRP为影响ASO患者发生ISR的危险因素(均P<0.05)。ROC曲线分析显示,血清miR-150,miR-155及二者联合预测ASO患者发生ISR的AUC(95%CI)分别为0.869(0.791~0.926),0.874(0.796~0.930)及0.976(0.926~0.996),联合检测显著优于二者单独预测(Z=2.679,2.745,均P<0.05)。结论ASO支架植入术后发生ISR的患者血清miR-150水平降低,miR-155水平升高,均是影响ASO患者发生ISR的因素,且二者联合具有较高的预测价值。展开更多
基金Science and Technology Development Foundation(STDF),Project NO.3457(TC/4/Health/2010/hep-1.6)
文摘BACKGROUND Diffusion-weighted magnetic resonance imaging has shown promise in the detection and quantification of hepatic fibrosis. In addition, the liver has numerous endogenous micro-RNAs(miRs) that play important roles in the regulation of biological processes such as cell proliferation and hepatic fibrosis.AIM To assess diffusion-weighted magnetic resonance imaging and miRs in diagnosing and staging hepatic fibrosis in patients with chronic hepatitis C.METHODS This prospective study included 208 patients and 82 age-and sex-matched controls who underwent diffusion-weighted magnetic resonance imaging of the abdomen, miR profiling, and liver biopsy. Pathological scoring was classified according to the METAVIR scoring system. The apparent diffusion coefficient (ADC) and miR were calculated and correlated with pathological scoring.RESULTS The ADC value decreased significantly with the progression of fibrosis, from controls(F0) to patients with early fibrosis(F1 and F2) to those with late fibrosis(F3 and F4)(median 1.92, 1.53, and 1.25 × 10^(-3) mm^2/s, respectively)(P = 0.001).The cut-off ADC value used to differentiate patients from controls was 1.83 × 10^(-3) mm^2/s with an area under the curve(AUC) of 0.992. Combining ADC and miR-200 b revealed the highest AUC(0.995) for differentiating patients from controls with an accuracy of 96.9%. The cut-off ADC used to differentiate early fibrosis from late fibrosis was 1.54 × 10^(-3) mm^2/s with an AUC of 0.866. The combination of ADC and miR-200 b revealed the best AUC(0.925) for differentiating early fibrosis from late fibrosis with an accuracy of 80.2%. The ADC correlated with miR-200 b(r =-0.61, P = 0.001), miR-21(r =-0.62, P = 0.001), and miR-29(r = 0.52,P = 0.001).CONCLUSION Combining ADC and miRs offers an alternative surrogate non-invasive diagnostic tool for diagnosing and staging hepatic fibrosis in patients with chronic hepatitis C.
文摘Breast cancer(BC) is the most frequent type of non skin cancer among women and a major leading cause of cancer-related deaths in Western countries. It is substantial to discover novel biomarkers with diagnostic, prognostic or predictive usefulness as well as therapeutic value for BC. Micro-RNAs(miR NAs) belong to a novel class of endogenous interfering RNAs that play a crucial role in post transcriptional gene silencing through m RNA targeting and, thus, are involved in many biological processes encompassing apoptosis,cell-cycle control, cell proliferation, DNA repair, immunity, metabolism, stress, aging, etc. Mi RNAs exert their action mainly in a tumor suppressive or oncogenic manner. The specific aberrant expression patterns of miR NAs in BC that are detected with the use of highthroughput technologies reflect their key role in cancer initiation, progression, migration, invasion and metastasis. The detection of circulating extracellular miR NAs in plasma of BC patients may provide novel, non-invasive biomarkers in favor of BC diagnosis and prognosis and,at the same time, accumulating evidence has underscored the possible contribution of miR NAs as valuable biomarkers to predict response to chemotherapy or radiotherapy. Data from in vitro and in vivo studies on BC have revealed promising therapeutic approaches via mi RNA delivery and mi RNA inhibition. The purpose of this review is to explore the ontological role of miR NAs in BC etiopathogenesis as well as to highlight their potential, not only as non-invasive circulating biomarkers with diagnostic and prognostic significance, but also as treatment response predictors and therapeutic targets aiding BC management.
基金Guangdong Provincial Center for clinical engineering of blood purification(507204531040)
文摘Background Mesenchymal stem cells(MSC)constitute an important repair system,but may be impaired by exposure to cardiovascular risk factors.Consequently,adipose tissue-derived MSCs from pigs with the metabolic syndrome(Met S)show decreased vitality.A growing number of micro RNAs(mi RNAs)are recognized as key modulators of senescence,but their role in regulating senescence in MSC in Mets is unclear.We tested the hypothesis that Met S upregulates in MSC expression of mi RNAs that can serve as post-transcriptional regulators of senescence-associated(SA)genes.Methods MSCs were collected from swine abdominal adipose tissue after 16 weeks of Lean or Obese diet(n=6 each).Next-generation mi RNA sequencing(mi RNA-seq)was performed to identify mi RNAs up-or down-regulated in Met S-MSC compare to Lean-MSCs.Functional pathway analysis of SA genes targeted by mi RNAs was performed using gene ontology analysis.MSC senescence was evaluated by p16 and p21 immunoreactivity,H2AX protein expression,and SA-beta-Galactosidase activity.In addition,gene expression of p16,p21,MAPK3,and MAPK14 was studied after inhibition of SA-mi R-27b.Results Senescence biomarkers were significantly elevated in Met S MSC.We found the 7 upregulated mi RNAs,including mi R-27b,and 3 downregulated mi RNAs in Met S-MSCs,which regulate 35 SA genes,particularly MAPK signaling.Inhibition of mi R-27b in cultured MSC downregulated p16 and MARP3 genes.Conclusions Met S modulate MSC expression of SA-mi RNAs that may play the role in modulating their senescence,and the p16 pathway in Met S-MSCs senescence is the primary pathway.
文摘目的探究下肢动脉硬化闭塞症(ASO)患者血清miR-150和miR-155水平表达对支架植入术再狭窄(ISR)的预测价值。方法选取2020年3月~2022年6月期间在德阳市人民医院接受支架植入治疗的108例ASO患者,根据其术后一年是否发生ISR,分为发生ISR组(n=42)和未发生ISR组(n=66)。实时荧光定量聚合酶链式反应(qRT-PCR)检测患者血清中miR-150和miR-155的相对表达水平;采用Pearson相关性分析血清miR-150,miR-155水平与低密度脂蛋白-胆固醇(LDL-C)、超敏C反应蛋白(hs-CRP)的相关性;采用多因素Logistic回归分析影响ASO患者发生ISR的因素;采用受试者工作特征(ROC)曲线分析血清miR-150,miR-155水平对ASO患者发生ISR的预测价值。结果与未发生ISR组相比,发生ISR组血清miR-150(0.65±0.16 vs 1.01±0.09)水平显著降低,miR-155(1.68±0.39 vs 1.02±0.11),LDL-C(2.85±0.76 mmol/L vs 2.21±0.62mmol/L),hs-CRP(2.36±0.47 mg/L vs 1.82±0.36mg/L)水平显著升高,差异具有统计学意义(t=4.785~14.957,均P<0.05)。经Pearson相关性分析显示,血清miR-150与LDL-C,hs-CRP水平呈显著负相关(r=-0.465,-0.532,均P<0.05),血清miR-155与LDL-C,hs-CRP水平呈显著正相关(r=0.453,0.481,均P<0.05)。多因素Logistic回归分析显示,血清miR-150是影响ASO患者发生ISR的保护因素,血清miR-155,LDL-C和hs-CRP为影响ASO患者发生ISR的危险因素(均P<0.05)。ROC曲线分析显示,血清miR-150,miR-155及二者联合预测ASO患者发生ISR的AUC(95%CI)分别为0.869(0.791~0.926),0.874(0.796~0.930)及0.976(0.926~0.996),联合检测显著优于二者单独预测(Z=2.679,2.745,均P<0.05)。结论ASO支架植入术后发生ISR的患者血清miR-150水平降低,miR-155水平升高,均是影响ASO患者发生ISR的因素,且二者联合具有较高的预测价值。
