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 pigmentosa.展开更多
Erratum to:J Huazhong Univ Sci Technol[Med Sci]36(4):548–553,2016 https://doi.org/10.1007/s11596-016-1623-6 In the originally published article(https://doi.org/10.1007/s11596-016-1623-6),the immunofluorescence images...Erratum to:J Huazhong Univ Sci Technol[Med Sci]36(4):548–553,2016 https://doi.org/10.1007/s11596-016-1623-6 In the originally published article(https://doi.org/10.1007/s11596-016-1623-6),the immunofluorescence images in shRNA group in Fig.3 were accidentally used rather than the final,formal experiments.To retain consistency,the entire Fig.3 is replaced here with original images of the experiments.The authors declare that this correction will not affect the conclusion of the study.展开更多
Precise targeting of specific regions within the central nervous system(CNS)is crucial for both scientific research and gene therapy in the context of brain diseases.Adeno-associated virus 13(AAV13)is known for its re...Precise targeting of specific regions within the central nervous system(CNS)is crucial for both scientific research and gene therapy in the context of brain diseases.Adeno-associated virus 13(AAV13)is known for its restricted diffusion range within the CNS,making it an ideal choice for precise labeling and administration within small brain regions.However,AAV13 mediates relatively low expression of target genes.Here,we introduced specifically engineered modifications to the AAV13 capsid protein to enhance its transduction efficiency.We first constructed AAV13-YF by mutating tyrosine to phenylalanine on the surface of the AAV13 capsid.We then inserted the 7m8 peptide,known to enhance cell transduction,into positions 587/588 and 585/586 of the AAV13 capsid,resulting in two distinct variants named AAV13-587-7m8 and AAV13-585-7m8,respectively.We found that AAV13-YF exhibited superior in vitro infectivity in HEK293T cells compared to AAV13,while AAV13-587-7m8 and AAV13-585-7m8 showed enhanced CNS infection capabilities in C57BL/6 mice,with AAV13-587-7m8 infection retaining a limited spread range.These modified AAV13 variants hold promising potential for applications in gene therapy and neuroscience research.展开更多
Traumatic brain injury results in neuronal loss and glial scar formation.Replenishing neurons and eliminating the consequences of glial scar formation are essential for treating traumatic brain injury.Neuronal reprogr...Traumatic brain injury results in neuronal loss and glial scar formation.Replenishing neurons and eliminating the consequences of glial scar formation are essential for treating traumatic brain injury.Neuronal reprogramming is a promising strategy to convert glial scars to neural tissue.However,previous studies have reported inconsistent results.In this study,an AAV9P1 vector incorporating an astrocyte-targeting P1 peptide and glial fibrillary acidic protein promoter was used to achieve dual-targeting of astrocytes and the glial scar while minimizing off-target effects.The results demonstrate that AAV9P1 provides high selectivity of astrocytes and reactive astrocytes.Moreover,neuronal reprogramming was induced by downregulating the polypyrimidine tract-binding protein 1 gene via systemic administration of AAV9P1 in a mouse model of traumatic brain injury.In summary,this approach provides an improved gene delivery vehicle to study neuronal programming and evidence of its applications for traumatic brain injury.展开更多
慢性乙型肝炎(chronic hepatitis B,CHB)是肝纤维化、肝硬化及肝细胞癌的主要风险因素。尽管目前干扰素和核苷类似物等广泛应用于临床,但仍难以彻底清除乙型肝炎病毒(hepatitis B virus,HBV),因此探究HBV感染的免疫机制,特别是宿主遗传...慢性乙型肝炎(chronic hepatitis B,CHB)是肝纤维化、肝硬化及肝细胞癌的主要风险因素。尽管目前干扰素和核苷类似物等广泛应用于临床,但仍难以彻底清除乙型肝炎病毒(hepatitis B virus,HBV),因此探究HBV感染的免疫机制,特别是宿主遗传背景的作用,对开发新治疗策略至关重要。本研究使用AAV8-rcccDNA小鼠模型,对比FVB/N×C57BL/6与DBA/2×C57BL/6两种遗传背景小鼠中HBV感染免疫反应的差异,探究了宿主遗传背景在HBV感染中的作用。结果显示,FVB/N×C57BL/6小鼠呈现免疫耐受状态,表现为持续的HBsAg表达和低HBsAb水平,而DBA/2×C57BL/6小鼠模拟了急性感染恢复状态,具体为HBsAg转阴、HBsAb阳性及病毒复制中低水平。本研究证实了在HBV感染治疗与研究中考虑宿主遗传背景差异的必要性,并指出适应性免疫系统调控在HBV治愈中的潜力,AAV8-rcccDNA小鼠模型的改进为模拟人类HBV感染免疫状态提供了有效的工具,有望助力HBV治疗策略的优化及研发。展开更多
Retrograde adeno-associated viruses(AAVs)are capable of infecting the axons of projection neurons and serve as a powerful tool for the anatomical and functional characterization of neural networks.However,few retro-gr...Retrograde adeno-associated viruses(AAVs)are capable of infecting the axons of projection neurons and serve as a powerful tool for the anatomical and functional characterization of neural networks.However,few retro-grade AAV capsids have been shown to offer access to cor-tical projection neurons across different species and enable the manipulation of neural function in non-human primates(NHPs).Here,we report the development of a novel retro-grade AAV capsid,AAV-DJ8R,which efficiently labeled cortical projection neurons after local administration into the striatum of mice and macaques.In addition,intrastriatally injected AAV-DJ8R mediated opsin expression in the mouse motor cortex and induced robust behavioral alterations.Moreover,AAV-DJ8R markedly increased motor cortical neuron firing upon optogenetic light stimulation after viral delivery into the macaque putamen.These data demonstrate the usefulness of AAV-DJ8R as an efficient retrograde tracer for cortical projection neurons in rodents and NHPs and indicate its suitability for use in conducting functional interrogations.展开更多
Objective:Imbalances in liver lipid metabolism and inflammatory reactions driven by oxidized lipid deposition in blood vessels constitute the core of atherosclerosis.Insufficient degradation of cholesterol in the live...Objective:Imbalances in liver lipid metabolism and inflammatory reactions driven by oxidized lipid deposition in blood vessels constitute the core of atherosclerosis.Insufficient degradation of cholesterol in the liver promotes oxidative modification of lipid particles and their deposition on the blood vessel wall in the peripheral circulation.The blood vessel wall engulfs and processes oxidized low-density lipoprotein(Ox-LDL)as foreign matter through pattern recognition receptors,ultimately forming lipid-encapsulated plaques.Among them,endothelial cell oxidized low density lipoprotein receptor 1(LOX1)phagocytosis is an important link in initiating and promoting this mechanism,and hepatocytes,which are the core of lipid metabolism,are unable to process oxidized lipid particles because of the lack of receptors for the uptake of Ox-LDL.The objective of this study was to investigate whether continuous clearance of Ox-LDL through the liver metabolic pathway could provide better protection against statins therapy.Methods:This study used statins combined with an adeno-associated virus(AAV8-TBG-LOX-1)liver-specific transfection system developed by our research group,in which statins reduced the level of LDL and promoted the ectopic expression of LOX-1 in hepatocytes to clear the continuous production of Ox-LDL.An ApoE knockout mouse model was used to study the effects of virus transfection and liver uptake and degradation of Ox-LDL.Laser confocal detection,Oil red staining and immunofluorescence staining were used to observe the effects of combined therapy on anti-atherosclerotic lesions.Results:Laser confocal microscopy revealed that the recombinant viral vector AAV8-TBG-LOX-1 could specifically transfect hepatocytes and express LOX-1,which mediate hepatocyte phagocytosis and clearance of Ox-LDL.Oil red O staining of the aorta and valvular ring suggested that statins combined with AAV8-TBG-LOX-1 significantly inhibited atherosclerotic lesions.Tissue immunofluorescence staining suggested that statins could reduce the aggregation of macrophages in plaques and that combined therapy could further reduce the aggregation of macrophages in plaques.Conclusion:Statins combined with AAV8-TBG-LOX-1 can alleviate the inflammatory response driven by lipids in the vascular wall,reduce the deposition of macrophages in plaques and inhibit atherosclerosis.展开更多
常用的基因治疗表达载体有病毒表达载体和质粒表达载体,这两类传统基因治疗载体含有大量病毒或细菌DNA序列,会引发人体较严重的免疫反应、细胞炎症、细胞毒性副作用、以及基因表达沉默化,是基因治疗应用于人类疾病治疗的一大障碍。项目...常用的基因治疗表达载体有病毒表达载体和质粒表达载体,这两类传统基因治疗载体含有大量病毒或细菌DNA序列,会引发人体较严重的免疫反应、细胞炎症、细胞毒性副作用、以及基因表达沉默化,是基因治疗应用于人类疾病治疗的一大障碍。项目构建了一种新型的、基于腺相关病毒(AAV)倒置末端重复序列(ITR)的基因表达单链微载体(AAV-ITR mini vector),并用GFP基因作为报告基因。通过热变性的方法制备单链DNA,然后将带有GFP的质粒、双链DNA载体、AAV-ITR基因表达微载体转入真核表达细胞,采用荧光显微镜观察和流式细胞仪检测等较为简单的方法来检测其表达效率。实验结果显示,AAV-ITR基因表达微载体在293T细胞中具有较高的转染、表达效率,并且具有类似AAV病毒载体的特性。该研究结果将有助于进一步研发类似于AAV病毒载体的安全、无免疫原性的人造基因治疗载体。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 pigmentosa.
文摘Erratum to:J Huazhong Univ Sci Technol[Med Sci]36(4):548–553,2016 https://doi.org/10.1007/s11596-016-1623-6 In the originally published article(https://doi.org/10.1007/s11596-016-1623-6),the immunofluorescence images in shRNA group in Fig.3 were accidentally used rather than the final,formal experiments.To retain consistency,the entire Fig.3 is replaced here with original images of the experiments.The authors declare that this correction will not affect the conclusion of the study.
基金National Science and Technology Innovation 2030 Grant(2021ZD0201003)National Natural Science Foundation of China(31830035,31771156,21921004)+2 种基金Strategic Priority Research Program of the Chinese Academy of Sciences(XDB32030200)Shenzhen Key Laboratory of Viral Vectors for Biomedicine(ZDSYS20200811142401005)Key Laboratory of Quality Control Technology for Virus-Based Therapeutics,Guangdong Provincial Medical Products Administration(2022ZDZ13)。
文摘Precise targeting of specific regions within the central nervous system(CNS)is crucial for both scientific research and gene therapy in the context of brain diseases.Adeno-associated virus 13(AAV13)is known for its restricted diffusion range within the CNS,making it an ideal choice for precise labeling and administration within small brain regions.However,AAV13 mediates relatively low expression of target genes.Here,we introduced specifically engineered modifications to the AAV13 capsid protein to enhance its transduction efficiency.We first constructed AAV13-YF by mutating tyrosine to phenylalanine on the surface of the AAV13 capsid.We then inserted the 7m8 peptide,known to enhance cell transduction,into positions 587/588 and 585/586 of the AAV13 capsid,resulting in two distinct variants named AAV13-587-7m8 and AAV13-585-7m8,respectively.We found that AAV13-YF exhibited superior in vitro infectivity in HEK293T cells compared to AAV13,while AAV13-587-7m8 and AAV13-585-7m8 showed enhanced CNS infection capabilities in C57BL/6 mice,with AAV13-587-7m8 infection retaining a limited spread range.These modified AAV13 variants hold promising potential for applications in gene therapy and neuroscience research.
基金supported by the National Natural Science Foundation of China,No.82073783(to YY)the Natural Science Foundation of Beijing,No.7212160(to YY).
文摘Traumatic brain injury results in neuronal loss and glial scar formation.Replenishing neurons and eliminating the consequences of glial scar formation are essential for treating traumatic brain injury.Neuronal reprogramming is a promising strategy to convert glial scars to neural tissue.However,previous studies have reported inconsistent results.In this study,an AAV9P1 vector incorporating an astrocyte-targeting P1 peptide and glial fibrillary acidic protein promoter was used to achieve dual-targeting of astrocytes and the glial scar while minimizing off-target effects.The results demonstrate that AAV9P1 provides high selectivity of astrocytes and reactive astrocytes.Moreover,neuronal reprogramming was induced by downregulating the polypyrimidine tract-binding protein 1 gene via systemic administration of AAV9P1 in a mouse model of traumatic brain injury.In summary,this approach provides an improved gene delivery vehicle to study neuronal programming and evidence of its applications for traumatic brain injury.
文摘慢性乙型肝炎(chronic hepatitis B,CHB)是肝纤维化、肝硬化及肝细胞癌的主要风险因素。尽管目前干扰素和核苷类似物等广泛应用于临床,但仍难以彻底清除乙型肝炎病毒(hepatitis B virus,HBV),因此探究HBV感染的免疫机制,特别是宿主遗传背景的作用,对开发新治疗策略至关重要。本研究使用AAV8-rcccDNA小鼠模型,对比FVB/N×C57BL/6与DBA/2×C57BL/6两种遗传背景小鼠中HBV感染免疫反应的差异,探究了宿主遗传背景在HBV感染中的作用。结果显示,FVB/N×C57BL/6小鼠呈现免疫耐受状态,表现为持续的HBsAg表达和低HBsAb水平,而DBA/2×C57BL/6小鼠模拟了急性感染恢复状态,具体为HBsAg转阴、HBsAb阳性及病毒复制中低水平。本研究证实了在HBV感染治疗与研究中考虑宿主遗传背景差异的必要性,并指出适应性免疫系统调控在HBV治愈中的潜力,AAV8-rcccDNA小鼠模型的改进为模拟人类HBV感染免疫状态提供了有效的工具,有望助力HBV治疗策略的优化及研发。
基金supported by Ministry of Science and Technology of China(2019YFA0903803 and 2018YFA0801404)National Natural Science Foundation of China(31871090,32000730,81961128019,and 81901397)+7 种基金Shenzhen Science and Technology Innovation Commission(JCYJ20190809171003698,JCYJ202103243001018,JCYJ20180507182505475,and JCYJ20180504165804015)Shenzhen Technological Research Center for Primate Translational Medicine(F-2021-Z99-504979)Youth Innovation Promotion Association(CAS 2017120)Chinese Academy of Sciences International Partnership Program(172644KYSB20170004)China Postdoctoral Science Foundation(2019M653115.)CAS Key Laboratory of Brain Connectome and Manipulation(2019DP173024)Guangdong Provincial Key Laboratory of Brain Connectome and Behavior(2017B030301017)International Science and Technology Cooperation Base of Guangdong Province(2019A050505008).
文摘Retrograde adeno-associated viruses(AAVs)are capable of infecting the axons of projection neurons and serve as a powerful tool for the anatomical and functional characterization of neural networks.However,few retro-grade AAV capsids have been shown to offer access to cor-tical projection neurons across different species and enable the manipulation of neural function in non-human primates(NHPs).Here,we report the development of a novel retro-grade AAV capsid,AAV-DJ8R,which efficiently labeled cortical projection neurons after local administration into the striatum of mice and macaques.In addition,intrastriatally injected AAV-DJ8R mediated opsin expression in the mouse motor cortex and induced robust behavioral alterations.Moreover,AAV-DJ8R markedly increased motor cortical neuron firing upon optogenetic light stimulation after viral delivery into the macaque putamen.These data demonstrate the usefulness of AAV-DJ8R as an efficient retrograde tracer for cortical projection neurons in rodents and NHPs and indicate its suitability for use in conducting functional interrogations.
基金supported by the National Natural Science Foundation of China(No.81873491)Wuhan Natural Science Foundation(No.WX20C06).
文摘Objective:Imbalances in liver lipid metabolism and inflammatory reactions driven by oxidized lipid deposition in blood vessels constitute the core of atherosclerosis.Insufficient degradation of cholesterol in the liver promotes oxidative modification of lipid particles and their deposition on the blood vessel wall in the peripheral circulation.The blood vessel wall engulfs and processes oxidized low-density lipoprotein(Ox-LDL)as foreign matter through pattern recognition receptors,ultimately forming lipid-encapsulated plaques.Among them,endothelial cell oxidized low density lipoprotein receptor 1(LOX1)phagocytosis is an important link in initiating and promoting this mechanism,and hepatocytes,which are the core of lipid metabolism,are unable to process oxidized lipid particles because of the lack of receptors for the uptake of Ox-LDL.The objective of this study was to investigate whether continuous clearance of Ox-LDL through the liver metabolic pathway could provide better protection against statins therapy.Methods:This study used statins combined with an adeno-associated virus(AAV8-TBG-LOX-1)liver-specific transfection system developed by our research group,in which statins reduced the level of LDL and promoted the ectopic expression of LOX-1 in hepatocytes to clear the continuous production of Ox-LDL.An ApoE knockout mouse model was used to study the effects of virus transfection and liver uptake and degradation of Ox-LDL.Laser confocal detection,Oil red staining and immunofluorescence staining were used to observe the effects of combined therapy on anti-atherosclerotic lesions.Results:Laser confocal microscopy revealed that the recombinant viral vector AAV8-TBG-LOX-1 could specifically transfect hepatocytes and express LOX-1,which mediate hepatocyte phagocytosis and clearance of Ox-LDL.Oil red O staining of the aorta and valvular ring suggested that statins combined with AAV8-TBG-LOX-1 significantly inhibited atherosclerotic lesions.Tissue immunofluorescence staining suggested that statins could reduce the aggregation of macrophages in plaques and that combined therapy could further reduce the aggregation of macrophages in plaques.Conclusion:Statins combined with AAV8-TBG-LOX-1 can alleviate the inflammatory response driven by lipids in the vascular wall,reduce the deposition of macrophages in plaques and inhibit atherosclerosis.
文摘常用的基因治疗表达载体有病毒表达载体和质粒表达载体,这两类传统基因治疗载体含有大量病毒或细菌DNA序列,会引发人体较严重的免疫反应、细胞炎症、细胞毒性副作用、以及基因表达沉默化,是基因治疗应用于人类疾病治疗的一大障碍。项目构建了一种新型的、基于腺相关病毒(AAV)倒置末端重复序列(ITR)的基因表达单链微载体(AAV-ITR mini vector),并用GFP基因作为报告基因。通过热变性的方法制备单链DNA,然后将带有GFP的质粒、双链DNA载体、AAV-ITR基因表达微载体转入真核表达细胞,采用荧光显微镜观察和流式细胞仪检测等较为简单的方法来检测其表达效率。实验结果显示,AAV-ITR基因表达微载体在293T细胞中具有较高的转染、表达效率,并且具有类似AAV病毒载体的特性。该研究结果将有助于进一步研发类似于AAV病毒载体的安全、无免疫原性的人造基因治疗载体。
