目的探讨长链非编码RNA EPB41L4A-AS1通过AKT调控子宫颈癌细胞自噬的作用和机制。方法运用小干扰RNA(siRNA)敲低子宫颈癌细胞HeLa中的EPB41L4A-AS1后,应用Western blot技术检测p62、LC3和AKT的蛋白表达水平,qRT-PCR检测AKT1和AKT2的mRN...目的探讨长链非编码RNA EPB41L4A-AS1通过AKT调控子宫颈癌细胞自噬的作用和机制。方法运用小干扰RNA(siRNA)敲低子宫颈癌细胞HeLa中的EPB41L4A-AS1后,应用Western blot技术检测p62、LC3和AKT的蛋白表达水平,qRT-PCR检测AKT1和AKT2的mRNA表达水平。在GFP-LC3稳定过表达的HeLa细胞中转染siEPB41L4A-AS1,利用共聚焦扫描显微镜检测外源性LC3形成的自噬小体的变化。在HeLa细胞中转染siEPB41L4A-AS1,利用免疫荧光技术和荧光显微镜检测内源性LC3形成的自噬小体的变化。基因集富集(gene set enrichment analysis,GSEA)分析AKT和自噬通路在EPB41L4A-AS1高表达组和低表达组子宫颈癌患者中的富集情况。结果与对照组相比,敲低EPB41L4A-AS148 h后HeLa细胞中p62表达水平显著下降(10%血清组:1.00±0 vs 0.39±0.17,无血清组:1.00±0 vs 0.55±0.14,P<0.05);LC3-Ⅱ与LC3-Ⅰ比值显著上升(10%血清组:1.00±0 vs 1.92±0.19,无血清组:1.00±0 vs 14.35±3.89,P<0.05);AKT1的mRNA(P<0.01)和蛋白(1.00±0 vs 1.82±0.14,P<0.01)水平均显著上调。GFP-LC3稳定过表达的HeLa细胞和未经处理的HeLa细胞在敲低EPB41L4A-AS1后,细胞内自噬小体的数量显著增多(P<0.05),且体积增大(P<0.05)。GSEA分析发现AKT和自噬通路在EPB41L4A-AS1低表达组子宫颈癌患者中显著富集。结论EPB41L4A-AS1可能通过AKT抑制子宫颈癌细胞的自噬水平。展开更多
通过稀有鮈鲫(Gobiocypris rarus)卵膜蛋白质组测序鉴定黏性卵膜中富集的透明带蛋白(Zona pellucida glycoproteins,Zps),建立可用于卵型研究的稀有鮈鲫zp基因突变体和转基因斑马鱼(Danio rerio)。实验收集稀有鮈鲫胚胎(1hour post fert...通过稀有鮈鲫(Gobiocypris rarus)卵膜蛋白质组测序鉴定黏性卵膜中富集的透明带蛋白(Zona pellucida glycoproteins,Zps),建立可用于卵型研究的稀有鮈鲫zp基因突变体和转基因斑马鱼(Danio rerio)。实验收集稀有鮈鲫胚胎(1hour post fertilization,hpf),分离收集足量卵膜,提取卵膜中的蛋白质进行测序分析。将测序数据进行拼接并与鲤科鱼类蛋白质进行比对,选取匹配度和丰度最高的基因zp2l2和zp4l进行实验。分别在zp2l2和zp4l的第一个外显子、第六个外显子设计CRISPR/Cas9敲除靶点,构建zp基因突变体。扩增斑马鱼zp3.2基因上游启动子序列(2874 base pairs,bps)和zp2l2、zp4l编码序列(1137、3009 bp),通过无缝克隆(Infusion cloning)将zp3.2启动子连接进入具有Tol2转座元件的质粒中,构得质粒pT2AL-zp3.2-eGPF;再将zp2l2、zp4l编码序列克隆到pT2AL-zp3.2-eGPF质粒中,得到可用于胚胎注射的转基因质粒pT2AL-zp3.2-zp2l2-eGPF和pT2AL-zp3.2-zp4l-eGPF。体外转录合成转座酶mRNA与构建的转基因质粒混合进行斑马鱼胚胎显微注射。通过稀有鮈鲫胚胎显微注射及三代鉴定,成功在稀有鮈鲫中敲除zp2l2和zp4l获得稳定遗传的纯合突变体;稀有鮈鲫zp转基因斑马鱼经传代鉴定,筛选得到了可稳定遗传的转基因品系Tg(zp3.2:zp2l2-eGPF)和Tg(zp3.2:zp4l-eGPF),这2个转基因品系的绿色荧光蛋白在斑马鱼胚胎发育的15d(days post fertilization,dpf)开始在卵巢和肝脏中表达。实验构建zp2l2和zp4l稀有鮈鲫突变体和转基因斑马鱼的方法,为鲤科鱼类卵型形成机制的研究提供了可行的实验思路和技术路线。展开更多
Objective:Lung cancer is the most common cause of cancer-related deaths worldwide.Platinum-based chemotherapy is one of the main treatment options for patients with non-small cell lung cancer(NSCLC)but the effectivene...Objective:Lung cancer is the most common cause of cancer-related deaths worldwide.Platinum-based chemotherapy is one of the main treatment options for patients with non-small cell lung cancer(NSCLC)but the effectiveness of chemotherapy is encumbered by drug resistance.Therefore,understanding the molecular mechanisms underlying chemotherapy resistance is crucial in improving treatment outcomes and prognosis.Methods:The cell viability assay and apoptosis were used to analyze chemoresistance.Western blot analysis and wound healing testing were used to evaluate the epithelial-to-mesenchymal transition(EMT).Immunoprecipitation was used for analysis of protein modification.Promoter activity was determined using the luciferase reporter assay.Immunofluorescence staining was used to determine reactive oxygen species levels.The expression patterns of EMT markers and carnitine palmitoyltransferase 1C(CPT1C)were determined by Western blot analysis.Results:CPT1C,which was shown to be highly expressed in lung cancer,is associated with cisplatin resistance in NSCLC cells.CPT1C depletion increased NSCLC cell sensitivity to cisplatin,while overexpression of CPT1C increased NSCLC cell resistance to cisplatin.Induction of EMT mediated CPT1C-induced cisplatin resistance.Ectopic expression of Snail reversed the increase in cisplatin sensitivity triggered by CPT1C knockdown.Moreover,CPT1C was shown to be regulated at the post-translational level and an E3-ubiquitin ligase,NEDD4L,was shown to be a major regulator of CPT1C stability and activity.Conclusions:These data provide evidence for the first time that the lipid metabolism enzyme,CPT1C,mediates resistance to chemotherapy.Therefore,the use of combination therapy with a CPT1C inhibitor may be a promising new avenue in lung cancer treatment.展开更多
目的:探究L3-L4椎间隙穿刺硬膜外镇痛对大龄初产妇顺产结局的影响。方法:选取2022年6月至2024年4月郑州大学第三附属医院收治的64例大龄初产妇作为研究对象,按随机数字表法分为对照组和试验组,各32例。为对照组产妇实施L2-L3椎间隙穿刺...目的:探究L3-L4椎间隙穿刺硬膜外镇痛对大龄初产妇顺产结局的影响。方法:选取2022年6月至2024年4月郑州大学第三附属医院收治的64例大龄初产妇作为研究对象,按随机数字表法分为对照组和试验组,各32例。为对照组产妇实施L2-L3椎间隙穿刺硬膜外镇痛,为试验组产妇实施L3-L4椎间隙穿刺硬膜外镇痛。比较两组产妇分娩镇痛情况、妊娠结局、新生儿情况及不良反应发生情况。结果:试验组产妇镇痛起效时间短于对照组,差异具有统计学意义(P<0.05),但两组产妇爆发痛次数、镇痛药物使用剂量、硬膜外自控镇痛次数比较,差异均无统计学意义(P>0.05);试验组产妇顺产率高于对照组,阴道助产率低于对照组,差异均具有统计学意义(P<0.05);试验组新生儿1 min Apgar评分(9.81±0.12)高于对照组(9.09±0.31),差异具有统计学意义(P<0.05),而两组新生儿胎心变异率、胎儿窘迫发生率比较,差异无统计学意义(P>0.05);试验组产妇不良反应总发生率低于对照组,差异具有统计学意义(P<0.05)。结论:L3-L4椎间隙穿刺硬膜外镇痛在大龄初产妇中的应用有利于缩短镇痛起效时间,提高产妇顺产率及新生儿1 min Apgar评分,并有利于减少不良反应。展开更多
文摘目的探讨长链非编码RNA EPB41L4A-AS1通过AKT调控子宫颈癌细胞自噬的作用和机制。方法运用小干扰RNA(siRNA)敲低子宫颈癌细胞HeLa中的EPB41L4A-AS1后,应用Western blot技术检测p62、LC3和AKT的蛋白表达水平,qRT-PCR检测AKT1和AKT2的mRNA表达水平。在GFP-LC3稳定过表达的HeLa细胞中转染siEPB41L4A-AS1,利用共聚焦扫描显微镜检测外源性LC3形成的自噬小体的变化。在HeLa细胞中转染siEPB41L4A-AS1,利用免疫荧光技术和荧光显微镜检测内源性LC3形成的自噬小体的变化。基因集富集(gene set enrichment analysis,GSEA)分析AKT和自噬通路在EPB41L4A-AS1高表达组和低表达组子宫颈癌患者中的富集情况。结果与对照组相比,敲低EPB41L4A-AS148 h后HeLa细胞中p62表达水平显著下降(10%血清组:1.00±0 vs 0.39±0.17,无血清组:1.00±0 vs 0.55±0.14,P<0.05);LC3-Ⅱ与LC3-Ⅰ比值显著上升(10%血清组:1.00±0 vs 1.92±0.19,无血清组:1.00±0 vs 14.35±3.89,P<0.05);AKT1的mRNA(P<0.01)和蛋白(1.00±0 vs 1.82±0.14,P<0.01)水平均显著上调。GFP-LC3稳定过表达的HeLa细胞和未经处理的HeLa细胞在敲低EPB41L4A-AS1后,细胞内自噬小体的数量显著增多(P<0.05),且体积增大(P<0.05)。GSEA分析发现AKT和自噬通路在EPB41L4A-AS1低表达组子宫颈癌患者中显著富集。结论EPB41L4A-AS1可能通过AKT抑制子宫颈癌细胞的自噬水平。
文摘通过稀有鮈鲫(Gobiocypris rarus)卵膜蛋白质组测序鉴定黏性卵膜中富集的透明带蛋白(Zona pellucida glycoproteins,Zps),建立可用于卵型研究的稀有鮈鲫zp基因突变体和转基因斑马鱼(Danio rerio)。实验收集稀有鮈鲫胚胎(1hour post fertilization,hpf),分离收集足量卵膜,提取卵膜中的蛋白质进行测序分析。将测序数据进行拼接并与鲤科鱼类蛋白质进行比对,选取匹配度和丰度最高的基因zp2l2和zp4l进行实验。分别在zp2l2和zp4l的第一个外显子、第六个外显子设计CRISPR/Cas9敲除靶点,构建zp基因突变体。扩增斑马鱼zp3.2基因上游启动子序列(2874 base pairs,bps)和zp2l2、zp4l编码序列(1137、3009 bp),通过无缝克隆(Infusion cloning)将zp3.2启动子连接进入具有Tol2转座元件的质粒中,构得质粒pT2AL-zp3.2-eGPF;再将zp2l2、zp4l编码序列克隆到pT2AL-zp3.2-eGPF质粒中,得到可用于胚胎注射的转基因质粒pT2AL-zp3.2-zp2l2-eGPF和pT2AL-zp3.2-zp4l-eGPF。体外转录合成转座酶mRNA与构建的转基因质粒混合进行斑马鱼胚胎显微注射。通过稀有鮈鲫胚胎显微注射及三代鉴定,成功在稀有鮈鲫中敲除zp2l2和zp4l获得稳定遗传的纯合突变体;稀有鮈鲫zp转基因斑马鱼经传代鉴定,筛选得到了可稳定遗传的转基因品系Tg(zp3.2:zp2l2-eGPF)和Tg(zp3.2:zp4l-eGPF),这2个转基因品系的绿色荧光蛋白在斑马鱼胚胎发育的15d(days post fertilization,dpf)开始在卵巢和肝脏中表达。实验构建zp2l2和zp4l稀有鮈鲫突变体和转基因斑马鱼的方法,为鲤科鱼类卵型形成机制的研究提供了可行的实验思路和技术路线。
基金supported by the National Natural Science Foundation of China(Grant No.81872371)the Open Project Program of State Key Laboratory of Molecular Oncology(Grant No.SKL-KF-2019-11)+3 种基金the Program for Excellent Sci-tech Innovation Teams of Universities in Anhui Province(Grant No.2023AH010073)the Provincial-level Quality Project in Higher Education Institutions of Anhui Province(Grant No.2022jyxm1710)the College Students Innovation and Entrepreneurship Training Program(Grant No.S202310368028 and S202410368035)the Health Science Research Project of Anhui Province(Grant No.AHWJ2022a028)。
文摘Objective:Lung cancer is the most common cause of cancer-related deaths worldwide.Platinum-based chemotherapy is one of the main treatment options for patients with non-small cell lung cancer(NSCLC)but the effectiveness of chemotherapy is encumbered by drug resistance.Therefore,understanding the molecular mechanisms underlying chemotherapy resistance is crucial in improving treatment outcomes and prognosis.Methods:The cell viability assay and apoptosis were used to analyze chemoresistance.Western blot analysis and wound healing testing were used to evaluate the epithelial-to-mesenchymal transition(EMT).Immunoprecipitation was used for analysis of protein modification.Promoter activity was determined using the luciferase reporter assay.Immunofluorescence staining was used to determine reactive oxygen species levels.The expression patterns of EMT markers and carnitine palmitoyltransferase 1C(CPT1C)were determined by Western blot analysis.Results:CPT1C,which was shown to be highly expressed in lung cancer,is associated with cisplatin resistance in NSCLC cells.CPT1C depletion increased NSCLC cell sensitivity to cisplatin,while overexpression of CPT1C increased NSCLC cell resistance to cisplatin.Induction of EMT mediated CPT1C-induced cisplatin resistance.Ectopic expression of Snail reversed the increase in cisplatin sensitivity triggered by CPT1C knockdown.Moreover,CPT1C was shown to be regulated at the post-translational level and an E3-ubiquitin ligase,NEDD4L,was shown to be a major regulator of CPT1C stability and activity.Conclusions:These data provide evidence for the first time that the lipid metabolism enzyme,CPT1C,mediates resistance to chemotherapy.Therefore,the use of combination therapy with a CPT1C inhibitor may be a promising new avenue in lung cancer treatment.
文摘目的:探究L3-L4椎间隙穿刺硬膜外镇痛对大龄初产妇顺产结局的影响。方法:选取2022年6月至2024年4月郑州大学第三附属医院收治的64例大龄初产妇作为研究对象,按随机数字表法分为对照组和试验组,各32例。为对照组产妇实施L2-L3椎间隙穿刺硬膜外镇痛,为试验组产妇实施L3-L4椎间隙穿刺硬膜外镇痛。比较两组产妇分娩镇痛情况、妊娠结局、新生儿情况及不良反应发生情况。结果:试验组产妇镇痛起效时间短于对照组,差异具有统计学意义(P<0.05),但两组产妇爆发痛次数、镇痛药物使用剂量、硬膜外自控镇痛次数比较,差异均无统计学意义(P>0.05);试验组产妇顺产率高于对照组,阴道助产率低于对照组,差异均具有统计学意义(P<0.05);试验组新生儿1 min Apgar评分(9.81±0.12)高于对照组(9.09±0.31),差异具有统计学意义(P<0.05),而两组新生儿胎心变异率、胎儿窘迫发生率比较,差异无统计学意义(P>0.05);试验组产妇不良反应总发生率低于对照组,差异具有统计学意义(P<0.05)。结论:L3-L4椎间隙穿刺硬膜外镇痛在大龄初产妇中的应用有利于缩短镇痛起效时间,提高产妇顺产率及新生儿1 min Apgar评分,并有利于减少不良反应。
