Over the past decade,a growing number of studies have reported transcription factor-based in situ reprogramming that can directly conve rt endogenous glial cells into functional neurons as an alternative approach for ...Over the past decade,a growing number of studies have reported transcription factor-based in situ reprogramming that can directly conve rt endogenous glial cells into functional neurons as an alternative approach for n euro regeneration in the adult mammalian central ne rvous system.Howeve r,many questions remain regarding how a terminally differentiated glial cell can transform into a delicate neuron that forms part of the intricate brain circuitry.In addition,concerns have recently been raised around the absence of astrocyte-to-neuron conversion in astrocytic lineage-tra cing mice.In this study,we employed repetitive two-photon imaging to continuously capture the in situ astrocyte-to-neuron conversion process following ecto pic expression of the neural transcription factor NeuroD1 in both prolife rating reactive astrocytes and lineage-tra ced astrocytes in the mouse cortex.Time-lapse imaging over several wee ks revealed the ste p-by-step transition from a typical astrocyte with numero us short,tapered branches to a typical neuro n with a few long neurites and dynamic growth cones that actively explored the local environment.In addition,these lineage-converting cells were able to migrate ra dially or to ngentially to relocate to suitable positions.Furthermore,two-photon Ca2+imaging and patch-clamp recordings confirmed that the newly generated neuro ns exhibited synchronous calcium signals,repetitive action potentials,and spontaneous synaptic responses,suggesting that they had made functional synaptic connections within local neural circuits.In conclusion,we directly visualized the step-by-step lineage conversion process from astrocytes to functional neurons in vivo and unambiguously demonstrated that adult mammalian brains are highly plastic with respect to their potential for neuro regeneration and neural circuit reconstruction.展开更多
In recent years,significant breakthroughs have been made in the field of gene ther-apy.Adeno-associated virus(AAV)is one of the most promising gene therapy vectors and a powerful tool for delivering the gene of intere...In recent years,significant breakthroughs have been made in the field of gene ther-apy.Adeno-associated virus(AAV)is one of the most promising gene therapy vectors and a powerful tool for delivering the gene of interest.Among the AAV vectors,AAV serotype 8(AAv8)has attracted much attention for its efficient and stable gene transfection into specific tissues.Currently,recombinant AAv8 has been widely used in gene therapy research on a va-riety of diseases,including genetic diseases,cancers,autoimmune diseases,and viral diseases.展开更多
目的总结Norrie病家系合并女方为未分化结缔组织病及血栓患者通过胚胎植入前单基因遗传学检测(preimplantation genetic testing for monogenic,PGT-M)助孕临床诊疗经验。方法报道通过生殖遗传、生殖医学、眼科、风湿内科及产科多学科诊...目的总结Norrie病家系合并女方为未分化结缔组织病及血栓患者通过胚胎植入前单基因遗传学检测(preimplantation genetic testing for monogenic,PGT-M)助孕临床诊疗经验。方法报道通过生殖遗传、生殖医学、眼科、风湿内科及产科多学科诊疗,对1例NDP基因第2外显子杂合缺失合并未分化结缔组织病及血栓病的患者进行家系构建、促排取卵、胚胎检测、冻融胚胎移植、羊膜腔穿刺、孕期及围产期监测的临床经过。结果该患者成功妊娠并足月分娩1名健康女婴。结论通过对该夫妇进行多学科诊疗管理,1个周期的PGT-M助孕使患者顺利获得健康的后代,减轻患者的心理和生理负担。展开更多
基金supported by the National Natural Science Foundation of China,No.31970906(to WLei)the Natural Science Foundation of Guangdong Province,No.2020A1515011079(to WLei)+4 种基金Key Technologies R&D Program of Guangdong Province,No.2018B030332001(to GC)Science and Technology Projects of Guangzhou,No.202206060002(to GC)the Youth Science Program of the National Natural Science Foundation of China,No.32100793(to ZX)the Pearl River Innovation and Entrepreneurship Team,No.2021ZT09 Y552Yi-Liang Liu Endowment Fund from Jinan University Education Development Foundation。
文摘Over the past decade,a growing number of studies have reported transcription factor-based in situ reprogramming that can directly conve rt endogenous glial cells into functional neurons as an alternative approach for n euro regeneration in the adult mammalian central ne rvous system.Howeve r,many questions remain regarding how a terminally differentiated glial cell can transform into a delicate neuron that forms part of the intricate brain circuitry.In addition,concerns have recently been raised around the absence of astrocyte-to-neuron conversion in astrocytic lineage-tra cing mice.In this study,we employed repetitive two-photon imaging to continuously capture the in situ astrocyte-to-neuron conversion process following ecto pic expression of the neural transcription factor NeuroD1 in both prolife rating reactive astrocytes and lineage-tra ced astrocytes in the mouse cortex.Time-lapse imaging over several wee ks revealed the ste p-by-step transition from a typical astrocyte with numero us short,tapered branches to a typical neuro n with a few long neurites and dynamic growth cones that actively explored the local environment.In addition,these lineage-converting cells were able to migrate ra dially or to ngentially to relocate to suitable positions.Furthermore,two-photon Ca2+imaging and patch-clamp recordings confirmed that the newly generated neuro ns exhibited synchronous calcium signals,repetitive action potentials,and spontaneous synaptic responses,suggesting that they had made functional synaptic connections within local neural circuits.In conclusion,we directly visualized the step-by-step lineage conversion process from astrocytes to functional neurons in vivo and unambiguously demonstrated that adult mammalian brains are highly plastic with respect to their potential for neuro regeneration and neural circuit reconstruction.
文摘In recent years,significant breakthroughs have been made in the field of gene ther-apy.Adeno-associated virus(AAV)is one of the most promising gene therapy vectors and a powerful tool for delivering the gene of interest.Among the AAV vectors,AAV serotype 8(AAv8)has attracted much attention for its efficient and stable gene transfection into specific tissues.Currently,recombinant AAv8 has been widely used in gene therapy research on a va-riety of diseases,including genetic diseases,cancers,autoimmune diseases,and viral diseases.
文摘目的总结Norrie病家系合并女方为未分化结缔组织病及血栓患者通过胚胎植入前单基因遗传学检测(preimplantation genetic testing for monogenic,PGT-M)助孕临床诊疗经验。方法报道通过生殖遗传、生殖医学、眼科、风湿内科及产科多学科诊疗,对1例NDP基因第2外显子杂合缺失合并未分化结缔组织病及血栓病的患者进行家系构建、促排取卵、胚胎检测、冻融胚胎移植、羊膜腔穿刺、孕期及围产期监测的临床经过。结果该患者成功妊娠并足月分娩1名健康女婴。结论通过对该夫妇进行多学科诊疗管理,1个周期的PGT-M助孕使患者顺利获得健康的后代,减轻患者的心理和生理负担。
