Retinitis pigmentosa is a group of inherited diseases that lead to retinal degeneration and photoreceptor cell death.However,there is no effective treatment for retinitis pigmentosa caused by PDE6B mutation.Adeno-asso...Retinitis pigmentosa is a group of inherited diseases that lead to retinal degeneration and photoreceptor cell death.However,there is no effective treatment for retinitis pigmentosa caused by PDE6B mutation.Adeno-associated virus(AAV)-mediated gene therapy is a promising strategy for treating retinitis pigmentosa.The aim of this study was to explore the molecular mechanisms by which AAV2-PDE6B rescues retinal function.To do this,we injected retinal degeneration 10(rd10)mice subretinally with AAV2-PDE6B and assessed the therapeutic effects on retinal function and structure using dark-and light-adapted electroretinogram,optical coherence tomography,and immunofluorescence.Data-independent acquisition-mass spectrometry-based proteomic analysis was conducted to investigate protein expression levels and pathway enrichment,and the results from this analysis were verified by real-time polymerase chain reaction and western blotting.AAV2-PDE6B injection significantly upregulated PDE6βexpression,preserved electroretinogram responses,and preserved outer nuclear layer thickness in rd10 mice.Differentially expressed proteins between wild-type and rd10 mice were closely related to visual perception,and treating rd10 mice with AAV2-PDE6B restored differentially expressed protein expression to levels similar to those seen in wild-type mice.Kyoto Encyclopedia of Genes and Genome analysis showed that the differentially expressed proteins whose expression was most significantly altered by AAV2-PDE6B injection were enriched in phototransduction pathways.Furthermore,the phototransductionrelated proteins Pde6α,Rom1,Rho,Aldh1a1,and Rbp1 exhibited opposite expression patterns in rd10 mice with or without AAV2-PDE6B treatment.Finally,Bax/Bcl-2,p-ERK/ERK,and p-c-Fos/c-Fos expression levels decreased in rd10 mice following AAV2-PDE6B treatment.Our data suggest that AAV2-PDE6B-mediated gene therapy promotes phototransduction and inhibits apoptosis by inhibiting the ERK signaling pathway and upregulating Bcl-2/Bax expression in retinitis pi展开更多
目的:构建ERK-2基因重组腺病毒载体,检测构建的腺病毒感染原代大鼠生长板软骨细胞的效率以及目的基因的表达。方法:将ERK-2 cDNA亚克隆到腺病毒穿梭载体pAdTrack-CMV中,线性化后与腺病毒骨架质粒pAdEasy-1共同转染E.Col.i B J5183,将筛...目的:构建ERK-2基因重组腺病毒载体,检测构建的腺病毒感染原代大鼠生长板软骨细胞的效率以及目的基因的表达。方法:将ERK-2 cDNA亚克隆到腺病毒穿梭载体pAdTrack-CMV中,线性化后与腺病毒骨架质粒pAdEasy-1共同转染E.Col.i B J5183,将筛选、鉴定的重组腺病毒质粒线性化后转染HEK293细胞进行病毒颗粒的包装;流式细胞术检测不同感染复数(MO I)ERK-2重组腺病毒感染原代培养的大鼠肋生长板软骨细胞的效率,W estern b lot检测腺病毒感染的生长板软骨细胞中ERK-2蛋白的表达。结果:成功构建ERK-2重组腺病毒,MO I 50的腺病毒感染原代生长板软骨细胞的效率大于90%,感染的生长板软骨细胞中ERK-2表达显著增加。结论:构建的重组腺病毒可介导ERK-2基因在原代大鼠生长板软骨细胞中高表达。展开更多
目的 探讨2型糖尿病小鼠发生主动脉血管钙化后,机体内二肽基肽酶-Ⅳ(dipeptidyl peptidase-4,DPP-4)、细胞外调节蛋白激酶(extracellular regulated protein kinases,ERK1/2)与kappa基因相结合的核因子(nuclear factor-kappa gene bindi...目的 探讨2型糖尿病小鼠发生主动脉血管钙化后,机体内二肽基肽酶-Ⅳ(dipeptidyl peptidase-4,DPP-4)、细胞外调节蛋白激酶(extracellular regulated protein kinases,ERK1/2)与kappa基因相结合的核因子(nuclear factor-kappa gene binding,NF-κB)等变化及相关机制的研究。方法 对正常小鼠(对照组)与糖尿病小鼠均进行高糖高脂饲料喂养,按照不同的给药方式进行分组治疗后,通过血液检测各组小鼠血糖及ELISA试剂盒检测各组小鼠DPP-4浓度变化,通过钙离子试剂盒测定主动脉中钙离子含量,通过Von Kossa钙化染色测定各组小鼠腹主动脉钙化情况,通过免疫组化与Western blot实验测定血管组织各蛋白的表达情况。结果 与对照组比较,糖尿病组小鼠血糖含量、主动脉钙离子含量、DPP-4浓度及血管钙化程度均升高( P <0.05);与糖尿病组比较,西格列汀及各抑制剂组小鼠血糖含量、主动脉钙离子含量、DPP-4浓度及血管钙化程度均降低( P <0.05)。与对照组比较,糖尿病组p-ERK与NF-кB蛋白表达量显著增加( P <0.05);与糖尿病组比较,西格列汀及各抑制剂组p-ERK与NF-κB蛋白表达量显著减少( P <0.05)。结论 糖尿病小鼠体内DPP-4含量明显增多,从而激活ERK1/2与NF-κB信号通路,促进其主动脉血管发生钙化。展开更多
基金supported by the National Natural Science Foundation of China,Nos.82071008(to BL)and 82004001(to XJ)Medical Science and Technology Program of Health Commission of Henan Province,No.LHGJ20210072(to RQ)Science and Technology Department of Henan Province,No.212102310307(to XJ)。
文摘Retinitis pigmentosa is a group of inherited diseases that lead to retinal degeneration and photoreceptor cell death.However,there is no effective treatment for retinitis pigmentosa caused by PDE6B mutation.Adeno-associated virus(AAV)-mediated gene therapy is a promising strategy for treating retinitis pigmentosa.The aim of this study was to explore the molecular mechanisms by which AAV2-PDE6B rescues retinal function.To do this,we injected retinal degeneration 10(rd10)mice subretinally with AAV2-PDE6B and assessed the therapeutic effects on retinal function and structure using dark-and light-adapted electroretinogram,optical coherence tomography,and immunofluorescence.Data-independent acquisition-mass spectrometry-based proteomic analysis was conducted to investigate protein expression levels and pathway enrichment,and the results from this analysis were verified by real-time polymerase chain reaction and western blotting.AAV2-PDE6B injection significantly upregulated PDE6βexpression,preserved electroretinogram responses,and preserved outer nuclear layer thickness in rd10 mice.Differentially expressed proteins between wild-type and rd10 mice were closely related to visual perception,and treating rd10 mice with AAV2-PDE6B restored differentially expressed protein expression to levels similar to those seen in wild-type mice.Kyoto Encyclopedia of Genes and Genome analysis showed that the differentially expressed proteins whose expression was most significantly altered by AAV2-PDE6B injection were enriched in phototransduction pathways.Furthermore,the phototransductionrelated proteins Pde6α,Rom1,Rho,Aldh1a1,and Rbp1 exhibited opposite expression patterns in rd10 mice with or without AAV2-PDE6B treatment.Finally,Bax/Bcl-2,p-ERK/ERK,and p-c-Fos/c-Fos expression levels decreased in rd10 mice following AAV2-PDE6B treatment.Our data suggest that AAV2-PDE6B-mediated gene therapy promotes phototransduction and inhibits apoptosis by inhibiting the ERK signaling pathway and upregulating Bcl-2/Bax expression in retinitis pi
文摘目的:构建ERK-2基因重组腺病毒载体,检测构建的腺病毒感染原代大鼠生长板软骨细胞的效率以及目的基因的表达。方法:将ERK-2 cDNA亚克隆到腺病毒穿梭载体pAdTrack-CMV中,线性化后与腺病毒骨架质粒pAdEasy-1共同转染E.Col.i B J5183,将筛选、鉴定的重组腺病毒质粒线性化后转染HEK293细胞进行病毒颗粒的包装;流式细胞术检测不同感染复数(MO I)ERK-2重组腺病毒感染原代培养的大鼠肋生长板软骨细胞的效率,W estern b lot检测腺病毒感染的生长板软骨细胞中ERK-2蛋白的表达。结果:成功构建ERK-2重组腺病毒,MO I 50的腺病毒感染原代生长板软骨细胞的效率大于90%,感染的生长板软骨细胞中ERK-2表达显著增加。结论:构建的重组腺病毒可介导ERK-2基因在原代大鼠生长板软骨细胞中高表达。
文摘目的 探讨2型糖尿病小鼠发生主动脉血管钙化后,机体内二肽基肽酶-Ⅳ(dipeptidyl peptidase-4,DPP-4)、细胞外调节蛋白激酶(extracellular regulated protein kinases,ERK1/2)与kappa基因相结合的核因子(nuclear factor-kappa gene binding,NF-κB)等变化及相关机制的研究。方法 对正常小鼠(对照组)与糖尿病小鼠均进行高糖高脂饲料喂养,按照不同的给药方式进行分组治疗后,通过血液检测各组小鼠血糖及ELISA试剂盒检测各组小鼠DPP-4浓度变化,通过钙离子试剂盒测定主动脉中钙离子含量,通过Von Kossa钙化染色测定各组小鼠腹主动脉钙化情况,通过免疫组化与Western blot实验测定血管组织各蛋白的表达情况。结果 与对照组比较,糖尿病组小鼠血糖含量、主动脉钙离子含量、DPP-4浓度及血管钙化程度均升高( P <0.05);与糖尿病组比较,西格列汀及各抑制剂组小鼠血糖含量、主动脉钙离子含量、DPP-4浓度及血管钙化程度均降低( P <0.05)。与对照组比较,糖尿病组p-ERK与NF-кB蛋白表达量显著增加( P <0.05);与糖尿病组比较,西格列汀及各抑制剂组p-ERK与NF-κB蛋白表达量显著减少( P <0.05)。结论 糖尿病小鼠体内DPP-4含量明显增多,从而激活ERK1/2与NF-κB信号通路,促进其主动脉血管发生钙化。
