目的研究微小RNA(miR)-483-3p减轻大鼠心肌纤维化的作用,探讨其机制与细胞自噬的关系。方法选取24只雄性SD大鼠,随机分为假手术组、模型组、空白转染组和高表达组,每组6只,通过尾静脉注射异丙肾上腺素建立心肌纤维化模型。空白转染组及...目的研究微小RNA(miR)-483-3p减轻大鼠心肌纤维化的作用,探讨其机制与细胞自噬的关系。方法选取24只雄性SD大鼠,随机分为假手术组、模型组、空白转染组和高表达组,每组6只,通过尾静脉注射异丙肾上腺素建立心肌纤维化模型。空白转染组及高表达组通过尾静脉分别单次注射腺相关病毒(AAV)-空白转染、AAV-miR-483-3p(5×10^(11)vg)进行预处理。14 d后,假手术组经尾静脉注射0.9%的氯化钠溶液[2.5 ml/(kg·d)],持续14 d;模型组、空白转染组和高表达组通过尾静脉注射异丙肾上腺素[2.5 ml/(kg·d),2 mg/ml],持续14 d。检测大鼠心肌病理损伤程度、心肌纤维化程度、胶原蛋白Ⅰ(Collagen-Ⅰ)表达量以及心肌细胞中微管相关蛋白轻链3(LC3)、细胞自噬相关蛋白5(Atg5)和自噬降解底物(P62)的表达。结果与假手术组比较,模型组心肌纤维化面积、Collagen-Ⅰ阳性表达量、Atg5及LC3-Ⅱ/LC3-Ⅰ比值显著增加,P62蛋白表达水平显著降低(P<0.05)。与模型组比较,高表达组心肌纤维化面积、Collagen-Ⅰ阳性表达量、Atg5及LC3-Ⅱ/LC3-Ⅰ比值显著降低[(13.64±1.51)%vs(27.47±1.55)%,(13.48±3.07)%vs(30.91±2.45)%,0.98±0.17 vs 1.24±0.28,0.66±0.05 vs 1.26±0.09,P<0.05],P62蛋白表达水平显著增高(0.91±0.11 vs 0.74±0.06,P<0.05)。结论miR-483-3p可减轻大鼠心肌纤维化,其机制可能与抑制心肌细胞自噬有关。展开更多
目的探讨微小RNA(miR)-483-3p在原发性高血压患者血清中的水平及诊断价值。方法选取2021年1月至2023年3月于三亚中心医院心内科就诊并确诊为原发性高血压的患者180例作为研究组,选取同期来我院体检且与研究组一般资料匹配的健康志愿者16...目的探讨微小RNA(miR)-483-3p在原发性高血压患者血清中的水平及诊断价值。方法选取2021年1月至2023年3月于三亚中心医院心内科就诊并确诊为原发性高血压的患者180例作为研究组,选取同期来我院体检且与研究组一般资料匹配的健康志愿者160例作为对照组。实时荧光定量聚合酶链反应检测2组血清miR-483-3p水平。结果与对照组比较,研究组总胆固醇(TC)、三酰甘油(TG)、低密度脂蛋白胆固醇(LDL-C)、收缩压、舒张压水平升高(P<0.01)。研究组血清miR-483-3p水平高于对照组(2.15±0.57 vs 1.00±0.05,P<0.01)。研究组中高血压1级、2级、3级患者血清miR-483-3p水平呈明显升高趋势(1.44±0.45 vs 1.79±0.58 vs 3.35±0.64,P<0.05)。相关性分析显示,研究组血清miR-483-3p水平与高血压分级呈正相关(r=0.745,P=0.000);研究组血清miR-483-3p水平与TC、TG、LDL-C、收缩压、舒张压水平均呈正相关(P<0.01)。miR-483-3p、TC、LDL-C、收缩压、舒张压是原发性高血压的独立影响因素(P<0.05,P<0.01)。血清miR-483-3p水平预测原发性高血压的曲线下面积为0.923(95%CI:0.890~0.949)。结论miR-483-3p在原发性高血压患者血清中的水平随病情严重程度的加重呈上升趋势,对原发性高血压有较高的诊断价值。展开更多
An important factor in the emergence and progre sion of osteosarcoma(OS)is the dysregulated expression of microRNAs(miRNAs).Transcription factor 7-like 1(TCF7LI),a member of the T cell factor/lymphoid enhancer factor(...An important factor in the emergence and progre sion of osteosarcoma(OS)is the dysregulated expression of microRNAs(miRNAs).Transcription factor 7-like 1(TCF7LI),a member of the T cell factor/lymphoid enhancer factor(TCF/LEF)transcription factor family,interacts with the Wnt signaling pathway regulator β-catenin and acts as a DNA-specific binding protein.This study sought to elucidate the impact of the interaction between miR 3293p and TCF7L1 on.the growth and apoptosis of OS and analyze the regulatory expression relationship between miRNA and mRNA in osteosarcoma cells using a variety of approaches.MiR329-3p was significantly downregulated,while TCF7L1 was considerably up-regulated in all examined OS cell lines.Additionally,a clinical comparison study was performed using the TCGA database.Subsequently,the regulatory relationship between miR-329-3p and TCF7L1 on the proliferation and apoptosis of OS cells was verified through in vitro and in vivo experiments.When miR 329-3p was transfected into the OS cell line,the expression of TCF7L1 decreased,the proliferation of OS cells was inhibited,the cytoskeleton disintegrated,and the nucleus condensed to fom apoptotic bodies.The expression of proteins that indicate apoptosis increased simultaneously.The cell cycle was arrested in the G0/G1 phase,and the G1/S transition was blocked.The introduction of miR 3293p also inhibited downstream Cyclin D1 of the Wnt pathway.Xenograf experiments indicated that the overexpression of miR-329-3p signi ficanly inhibited the growth of OS xenografts in nude mice,and the expression of TCF7L1 and C-Myc in tumor tssues decreased.MiR 329-3p was significantly reduced in OS cells and played a suppressive role in tumorigenesis and proliferation by targeting TCF7L1 both in vitro and in vivo.Osteosarcoma cell cycle arrest and pathway inhibition were observed upon the regulation of TCF7LI by miR 3293p.Summarizing these results,it can be inferred that miR.3293p exerts anticancer efects in osteosarcoma by inhibiting TCF7L1.展开更多
文摘目的研究微小RNA(miR)-483-3p减轻大鼠心肌纤维化的作用,探讨其机制与细胞自噬的关系。方法选取24只雄性SD大鼠,随机分为假手术组、模型组、空白转染组和高表达组,每组6只,通过尾静脉注射异丙肾上腺素建立心肌纤维化模型。空白转染组及高表达组通过尾静脉分别单次注射腺相关病毒(AAV)-空白转染、AAV-miR-483-3p(5×10^(11)vg)进行预处理。14 d后,假手术组经尾静脉注射0.9%的氯化钠溶液[2.5 ml/(kg·d)],持续14 d;模型组、空白转染组和高表达组通过尾静脉注射异丙肾上腺素[2.5 ml/(kg·d),2 mg/ml],持续14 d。检测大鼠心肌病理损伤程度、心肌纤维化程度、胶原蛋白Ⅰ(Collagen-Ⅰ)表达量以及心肌细胞中微管相关蛋白轻链3(LC3)、细胞自噬相关蛋白5(Atg5)和自噬降解底物(P62)的表达。结果与假手术组比较,模型组心肌纤维化面积、Collagen-Ⅰ阳性表达量、Atg5及LC3-Ⅱ/LC3-Ⅰ比值显著增加,P62蛋白表达水平显著降低(P<0.05)。与模型组比较,高表达组心肌纤维化面积、Collagen-Ⅰ阳性表达量、Atg5及LC3-Ⅱ/LC3-Ⅰ比值显著降低[(13.64±1.51)%vs(27.47±1.55)%,(13.48±3.07)%vs(30.91±2.45)%,0.98±0.17 vs 1.24±0.28,0.66±0.05 vs 1.26±0.09,P<0.05],P62蛋白表达水平显著增高(0.91±0.11 vs 0.74±0.06,P<0.05)。结论miR-483-3p可减轻大鼠心肌纤维化,其机制可能与抑制心肌细胞自噬有关。
文摘目的探讨微小RNA(miR)-483-3p在原发性高血压患者血清中的水平及诊断价值。方法选取2021年1月至2023年3月于三亚中心医院心内科就诊并确诊为原发性高血压的患者180例作为研究组,选取同期来我院体检且与研究组一般资料匹配的健康志愿者160例作为对照组。实时荧光定量聚合酶链反应检测2组血清miR-483-3p水平。结果与对照组比较,研究组总胆固醇(TC)、三酰甘油(TG)、低密度脂蛋白胆固醇(LDL-C)、收缩压、舒张压水平升高(P<0.01)。研究组血清miR-483-3p水平高于对照组(2.15±0.57 vs 1.00±0.05,P<0.01)。研究组中高血压1级、2级、3级患者血清miR-483-3p水平呈明显升高趋势(1.44±0.45 vs 1.79±0.58 vs 3.35±0.64,P<0.05)。相关性分析显示,研究组血清miR-483-3p水平与高血压分级呈正相关(r=0.745,P=0.000);研究组血清miR-483-3p水平与TC、TG、LDL-C、收缩压、舒张压水平均呈正相关(P<0.01)。miR-483-3p、TC、LDL-C、收缩压、舒张压是原发性高血压的独立影响因素(P<0.05,P<0.01)。血清miR-483-3p水平预测原发性高血压的曲线下面积为0.923(95%CI:0.890~0.949)。结论miR-483-3p在原发性高血压患者血清中的水平随病情严重程度的加重呈上升趋势,对原发性高血压有较高的诊断价值。
基金The Fund of National Cancer Center Research and Development(26-A-4),The Grants-in-Aid for Scientific Research(Grant Nos.15K10451,16K10866 and 16K20063)from Japan Society for the Promotion of Science.
文摘An important factor in the emergence and progre sion of osteosarcoma(OS)is the dysregulated expression of microRNAs(miRNAs).Transcription factor 7-like 1(TCF7LI),a member of the T cell factor/lymphoid enhancer factor(TCF/LEF)transcription factor family,interacts with the Wnt signaling pathway regulator β-catenin and acts as a DNA-specific binding protein.This study sought to elucidate the impact of the interaction between miR 3293p and TCF7L1 on.the growth and apoptosis of OS and analyze the regulatory expression relationship between miRNA and mRNA in osteosarcoma cells using a variety of approaches.MiR329-3p was significantly downregulated,while TCF7L1 was considerably up-regulated in all examined OS cell lines.Additionally,a clinical comparison study was performed using the TCGA database.Subsequently,the regulatory relationship between miR-329-3p and TCF7L1 on the proliferation and apoptosis of OS cells was verified through in vitro and in vivo experiments.When miR 329-3p was transfected into the OS cell line,the expression of TCF7L1 decreased,the proliferation of OS cells was inhibited,the cytoskeleton disintegrated,and the nucleus condensed to fom apoptotic bodies.The expression of proteins that indicate apoptosis increased simultaneously.The cell cycle was arrested in the G0/G1 phase,and the G1/S transition was blocked.The introduction of miR 3293p also inhibited downstream Cyclin D1 of the Wnt pathway.Xenograf experiments indicated that the overexpression of miR-329-3p signi ficanly inhibited the growth of OS xenografts in nude mice,and the expression of TCF7L1 and C-Myc in tumor tssues decreased.MiR 329-3p was significantly reduced in OS cells and played a suppressive role in tumorigenesis and proliferation by targeting TCF7L1 both in vitro and in vivo.Osteosarcoma cell cycle arrest and pathway inhibition were observed upon the regulation of TCF7LI by miR 3293p.Summarizing these results,it can be inferred that miR.3293p exerts anticancer efects in osteosarcoma by inhibiting TCF7L1.
