BACKGROUND Increasing data indicated that long noncoding RNAs(lncRNAs)were directly or indirectly involved in the occurrence and development of tumors,including hepatocellular carcinoma(HCC).Recent studies had found t...BACKGROUND Increasing data indicated that long noncoding RNAs(lncRNAs)were directly or indirectly involved in the occurrence and development of tumors,including hepatocellular carcinoma(HCC).Recent studies had found that the expression of lncRNA HAND2-AS1 was downregulated in HCC tissues,but its role in HCC progression is unclear.Ultrasound targeted microbubble destruction mediated gene transfection is a new method to overexpress genes.AIM To study the role of ultrasound microbubbles(UTMBs)mediated HAND2-AS1 in the progression of HCC,in order to provide a new reference for the treatment of HCC.METHODS In vitro,we transfected HAND2-AS1 siRNA into HepG2 cells by UTMBs,and detected cell proliferation,apoptosis,invasion and epithelial-mesenchymal transition(EMT)by cell counting kit-8 assay,flow cytometry,Transwell invasion assay and Western blotting,respectively.In addition,we transfected miR-837-5p mimic into UTMBs treated cells and observed the changes of cell behavior.Next,the UTMBs treated HepG2 cells were transfected together with miR-837-5p mimic and tissue inhibitor of matrix metalloproteinase-2(TIMP2)overexpression vector,and we detected cell proliferation,apoptosis,invasion and EMT.In vivo,we established a mouse model of subcutaneous transplantation of HepG2 cells and observed the effect of HAND2-AS1 silencing on tumor formation ability.RESULTS We found that UTMBs carrying HAND2-AS1 restricted cell proliferation,invasion,and EMT,encouraged apoptosis,and HAND2-AS1 silencing eliminated the effect of UTMBs.Additionally,miR-873-5p targets the gene HAND2-AS1,which also targets the 3’UTR of TIMP2.And miR-873-5p mimic counteracted the impact of HAND2-AS1.Further,miR-873-5p mimic solely or in combination with pcDNA-TIMP2 had been transformed into HepG2 cells exposed to UTMBs.We discovered that TIMP2 reversed the effect of miR-873-5p mimic caused by the blocked signalling cascade for matrix metalloproteinase(MMP)2/MMP9.In vivo results showed that HAND2-AS1 silencing significantly inhibited tumor formation in mice.CONCLUSION LncRNA HAND2-AS1 promotes TIMP2 expression by targeting miR-873-5p to inhibit HepG2 cell growth and delay HCC progression.展开更多
目的系统评价糖尿病患者在接种SARS-CoV-2疫苗后的体液和细胞免疫反应。方法检索Web of Science、PubMed、中国知网、万方数据知识服务平台、维普中文科技期刊全文数据库和中国生物医学文献数据库,获取国内外于2019年12月1日至2022年5...目的系统评价糖尿病患者在接种SARS-CoV-2疫苗后的体液和细胞免疫反应。方法检索Web of Science、PubMed、中国知网、万方数据知识服务平台、维普中文科技期刊全文数据库和中国生物医学文献数据库,获取国内外于2019年12月1日至2022年5月12日公开发表的有关糖尿病患者接种SARS-CoV-2疫苗后的体液和细胞免疫反应的观察性研究,经由2名研究者独立筛选文献和提取资料后,采用美国国立卫生研究质量评价工具对纳入文献进行偏倚风险评价,使用描述性统计方法进行汇总分析。结果13篇文献共纳入66651例研究对象,其中5874例(7.9%)患有糖尿病。7篇文献报道了接种第1剂疫苗后糖尿病患者和对照组的免疫反应,其中3篇文献表明,接种1剂SARS-CoV-2疫苗后,糖尿病患者血清抗体水平和阳性率低于对照组;11篇涉及接种2剂SARS-CoV-2疫苗后的免疫反应的文献中,2篇报道了糖尿病患者可产生与对照组相似的抗体反应,9篇报道了糖尿病患者的血清抗体水平、阳性率或细胞免疫反应低于对照组。结论接种SARS-CoV-2疫苗后糖尿病患者和对照组体液和细胞免疫反应均有所增加,但糖尿病患者增加幅度普遍低于对照组。展开更多
目的探讨环状RNA ACAP2(circACAP2)调节微小RNA(miR)-421/B细胞易位基因2(BTG2)轴对心肌梗死(MI)大鼠心肌损伤的影响。方法构建MI大鼠模型和H9c2细胞模型,将80只大鼠分为假手术组、MI组、小干扰RNA-阴性对照(si-NC)组、si-circACAP2组、...目的探讨环状RNA ACAP2(circACAP2)调节微小RNA(miR)-421/B细胞易位基因2(BTG2)轴对心肌梗死(MI)大鼠心肌损伤的影响。方法构建MI大鼠模型和H9c2细胞模型,将80只大鼠分为假手术组、MI组、小干扰RNA-阴性对照(si-NC)组、si-circACAP2组、pcDNA3.1组、pcDNA3.1-circACAP2组、pcDNA3.1-circACAP2+模拟物(mimic)NC组、pcDNA3.1-circACAP2+miR-421 mimic组,每组各10只。将缺氧H9c2细胞置于24孔板中,瞬时转染细胞,分为缺氧组、缺氧+si-NC组、缺氧+si-circACAP2组、缺氧+pcDNA3.1组、缺氧+pcDNA3.1-circACAP2组、缺氧+pcDNA3.1-circACAP2+mimic NC组、缺氧+pcDNA3.1-circACAP2+miR-421 mimic组,另取正常培养的H9c2细胞作为对照组。检测大鼠左心室射血分数(LVEF)、左心室短轴缩短率(LVFS)、心肌梗死情况、心肌组织病理变化、circACAP2、miR-421、BTG2 mRNA表达情况、乳酸脱氢酶(LDH)、肌酸激酶同工酶(CK-MB)活性、H9c2细胞活力和凋亡、心肌组织BTG2蛋白表达、H9c2细胞BTG2蛋白表达。结果MI组circACAP2、BTG2 mRNA表达高于假手术组(1.84±0.21 vs 1.00±0.10,1.68±0.17 vs 1.00±0.10),miR-421表达低于假手术组(0.49±0.05 vs 1.00±0.11,P<0.05);与假手术组比较,MI组梗死面积、CK-MB、LDH活性升高,LVFS、LVEF降低(P<0.05)。与si-NC组比较,si-circACAP2组心肌损伤减轻,LVFS、LVEF升高,梗死面积、CK-MB、LDH活性降低(P<0.05);与缺氧+si-NC组比较,缺氧+si-circACAP2组细胞活力升高,凋亡率、CK-MB和LDH活性降低(P<0.05)。与pcDNA3.1组比较,pcDNA3.1-circACAP2组心肌损伤加重,LVFS、LVEF降低,梗死面积、CK-MB、LDH活性升高(P<0.05);与缺氧+pcDNA3.1组比较,缺氧+pcDNA3.1-circACAP2组细胞活力降低,凋亡率、CK-MB、LDH活性升高(P<0.05)。结论circACAP2在MI大鼠和H9c2细胞中表达上调,沉默circACAP2可能通过调节miR-421/BTG2轴改善心脏功能,减少心肌损伤,提高心肌细胞活力。展开更多
文摘BACKGROUND Increasing data indicated that long noncoding RNAs(lncRNAs)were directly or indirectly involved in the occurrence and development of tumors,including hepatocellular carcinoma(HCC).Recent studies had found that the expression of lncRNA HAND2-AS1 was downregulated in HCC tissues,but its role in HCC progression is unclear.Ultrasound targeted microbubble destruction mediated gene transfection is a new method to overexpress genes.AIM To study the role of ultrasound microbubbles(UTMBs)mediated HAND2-AS1 in the progression of HCC,in order to provide a new reference for the treatment of HCC.METHODS In vitro,we transfected HAND2-AS1 siRNA into HepG2 cells by UTMBs,and detected cell proliferation,apoptosis,invasion and epithelial-mesenchymal transition(EMT)by cell counting kit-8 assay,flow cytometry,Transwell invasion assay and Western blotting,respectively.In addition,we transfected miR-837-5p mimic into UTMBs treated cells and observed the changes of cell behavior.Next,the UTMBs treated HepG2 cells were transfected together with miR-837-5p mimic and tissue inhibitor of matrix metalloproteinase-2(TIMP2)overexpression vector,and we detected cell proliferation,apoptosis,invasion and EMT.In vivo,we established a mouse model of subcutaneous transplantation of HepG2 cells and observed the effect of HAND2-AS1 silencing on tumor formation ability.RESULTS We found that UTMBs carrying HAND2-AS1 restricted cell proliferation,invasion,and EMT,encouraged apoptosis,and HAND2-AS1 silencing eliminated the effect of UTMBs.Additionally,miR-873-5p targets the gene HAND2-AS1,which also targets the 3’UTR of TIMP2.And miR-873-5p mimic counteracted the impact of HAND2-AS1.Further,miR-873-5p mimic solely or in combination with pcDNA-TIMP2 had been transformed into HepG2 cells exposed to UTMBs.We discovered that TIMP2 reversed the effect of miR-873-5p mimic caused by the blocked signalling cascade for matrix metalloproteinase(MMP)2/MMP9.In vivo results showed that HAND2-AS1 silencing significantly inhibited tumor formation in mice.CONCLUSION LncRNA HAND2-AS1 promotes TIMP2 expression by targeting miR-873-5p to inhibit HepG2 cell growth and delay HCC progression.
文摘目的系统评价糖尿病患者在接种SARS-CoV-2疫苗后的体液和细胞免疫反应。方法检索Web of Science、PubMed、中国知网、万方数据知识服务平台、维普中文科技期刊全文数据库和中国生物医学文献数据库,获取国内外于2019年12月1日至2022年5月12日公开发表的有关糖尿病患者接种SARS-CoV-2疫苗后的体液和细胞免疫反应的观察性研究,经由2名研究者独立筛选文献和提取资料后,采用美国国立卫生研究质量评价工具对纳入文献进行偏倚风险评价,使用描述性统计方法进行汇总分析。结果13篇文献共纳入66651例研究对象,其中5874例(7.9%)患有糖尿病。7篇文献报道了接种第1剂疫苗后糖尿病患者和对照组的免疫反应,其中3篇文献表明,接种1剂SARS-CoV-2疫苗后,糖尿病患者血清抗体水平和阳性率低于对照组;11篇涉及接种2剂SARS-CoV-2疫苗后的免疫反应的文献中,2篇报道了糖尿病患者可产生与对照组相似的抗体反应,9篇报道了糖尿病患者的血清抗体水平、阳性率或细胞免疫反应低于对照组。结论接种SARS-CoV-2疫苗后糖尿病患者和对照组体液和细胞免疫反应均有所增加,但糖尿病患者增加幅度普遍低于对照组。
文摘目的探讨环状RNA ACAP2(circACAP2)调节微小RNA(miR)-421/B细胞易位基因2(BTG2)轴对心肌梗死(MI)大鼠心肌损伤的影响。方法构建MI大鼠模型和H9c2细胞模型,将80只大鼠分为假手术组、MI组、小干扰RNA-阴性对照(si-NC)组、si-circACAP2组、pcDNA3.1组、pcDNA3.1-circACAP2组、pcDNA3.1-circACAP2+模拟物(mimic)NC组、pcDNA3.1-circACAP2+miR-421 mimic组,每组各10只。将缺氧H9c2细胞置于24孔板中,瞬时转染细胞,分为缺氧组、缺氧+si-NC组、缺氧+si-circACAP2组、缺氧+pcDNA3.1组、缺氧+pcDNA3.1-circACAP2组、缺氧+pcDNA3.1-circACAP2+mimic NC组、缺氧+pcDNA3.1-circACAP2+miR-421 mimic组,另取正常培养的H9c2细胞作为对照组。检测大鼠左心室射血分数(LVEF)、左心室短轴缩短率(LVFS)、心肌梗死情况、心肌组织病理变化、circACAP2、miR-421、BTG2 mRNA表达情况、乳酸脱氢酶(LDH)、肌酸激酶同工酶(CK-MB)活性、H9c2细胞活力和凋亡、心肌组织BTG2蛋白表达、H9c2细胞BTG2蛋白表达。结果MI组circACAP2、BTG2 mRNA表达高于假手术组(1.84±0.21 vs 1.00±0.10,1.68±0.17 vs 1.00±0.10),miR-421表达低于假手术组(0.49±0.05 vs 1.00±0.11,P<0.05);与假手术组比较,MI组梗死面积、CK-MB、LDH活性升高,LVFS、LVEF降低(P<0.05)。与si-NC组比较,si-circACAP2组心肌损伤减轻,LVFS、LVEF升高,梗死面积、CK-MB、LDH活性降低(P<0.05);与缺氧+si-NC组比较,缺氧+si-circACAP2组细胞活力升高,凋亡率、CK-MB和LDH活性降低(P<0.05)。与pcDNA3.1组比较,pcDNA3.1-circACAP2组心肌损伤加重,LVFS、LVEF降低,梗死面积、CK-MB、LDH活性升高(P<0.05);与缺氧+pcDNA3.1组比较,缺氧+pcDNA3.1-circACAP2组细胞活力降低,凋亡率、CK-MB、LDH活性升高(P<0.05)。结论circACAP2在MI大鼠和H9c2细胞中表达上调,沉默circACAP2可能通过调节miR-421/BTG2轴改善心脏功能,减少心肌损伤,提高心肌细胞活力。
