病毒递送 GDNF 促进帕金森病中人干细胞移植物的功能整合
Viral Delivery of GDNF Promotes Functional Integration of Human Stem Cell Grafts in Parkinson's Disease
人多能干细胞（hPSC）来源的多巴胺能神经元移植已进入帕金森病临床试验，但移植物中多巴胺能神经元比例低、可塑性差。本研究在大鼠帕金森病模型中，将 GDNF 基因递送至移植部位，发现早期 GDNF 暴露促进非多巴胺能神经元的存活和可塑性，改善运动恢复；延迟暴露则通过增加多巴胺能神经元特化、可塑性和多巴胺代谢促进功能恢复。转录组分析提示 MAPK 信号通路参与其中。该研究提示神经营养基因治疗可改善干细胞移植效果。
为什么推荐给您：在动物模型中验证 GDNF 联合干细胞移植的新策略，为移植优化提供思路，但尚属临床前概念验证。
不需要生物学背景，多打比方
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摘要Abstract
Dopaminergic neurons (DAns), generated from human pluripotent stem cells (hPSCs), are capable of functionally integrating following transplantation and have recently advanced to clinical trials for Parkinson's disease (PD). However, pre-clinical studies have highlighted the low proportion of DAns within hPSC-derived grafts and their inferior plasticity compared to fetal tissue. Here, we examined whether delivery of a developmentally critical protein, glial cell line-derived neurotrophic factor (GDNF), could improve graft outcomes. We tracked the response of DAns implanted into either a GDNF-rich environment or after a delay in exposure. Early GDNF promoted survival and plasticity of non-DAns, leading to enhanced motor recovery in PD rats. Delayed exposure to GDNF promoted functional recovery through increases in DAn specification, DAn plasticity, and DA metabolism. Transcriptional profiling revealed a role for mitogen-activated protein kinase (MAPK)-signaling downstream of GDNF. Collectively, these results demonstrate the potential of neurotrophic gene therapy strategies to improve hPSC graft outcomes.