中山大学附属第五医院精神心理科,广东 珠海 519000
韦淳仁,第一作者,研究方向:强迫症的发病机制,E-mail:weichr@mail2.sysu.edu.cn
收稿:2026-01-14,
修回:2026-04-07,
录用:2026-04-24,
纸质出版:2026-05-20
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韦淳仁,罗宇翀,王炜洁等.RVG修饰的间充质干细胞外泌体通过转变小胶质细胞极性治疗强迫症[J].中山大学学报(医学科学版),2026,47(03):468-481.
WEI Chunren,LUO Yuchong,WANG Weijie,et al.RVG-modified Mesenchymal Stem Cell Exosomes Treat Obsessive-compulsive Disorder by Shifting Microglia Polarity[J].Journal of Sun Yat-sen University(Medical Sciences),2026,47(03):468-481.
韦淳仁,罗宇翀,王炜洁等.RVG修饰的间充质干细胞外泌体通过转变小胶质细胞极性治疗强迫症[J].中山大学学报(医学科学版),2026,47(03):468-481. DOI: 10.11714/jsysu.med.YX20260012.
WEI Chunren,LUO Yuchong,WANG Weijie,et al.RVG-modified Mesenchymal Stem Cell Exosomes Treat Obsessive-compulsive Disorder by Shifting Microglia Polarity[J].Journal of Sun Yat-sen University(Medical Sciences),2026,47(03):468-481. DOI: 10.11714/jsysu.med.YX20260012.
目的
2
为了探究狂犬病毒糖蛋白(RVG)修饰的间充质干细胞外泌体对强迫症小鼠模型的治疗效果,明确外泌体治疗强迫症的疗效以及探究其发挥作用的机制。
方法
2
提取原代小鼠脂肪来源的间充质干细胞,使用病毒感染获得过表达RVG的间充质干细胞外泌体,并通过粒径分析、Western blot、透射电镜表征外泌体。利用喹吡罗构建强迫症小鼠模型,将小鼠分为5组:对照组、模型组、氯米帕明(CMI)组、间充质干细胞外泌体(MSC-EXO)组、RVG修饰的间充质干细胞外泌体(RVG-MSC-EXO)组,并通过行为学实验如强迫检查、旷场、埋珠、水迷宫测试小鼠强迫、认知等行为。通过qPCR、ELISA检测小鼠前额叶皮质炎症因子水平,并通过免疫荧光检测小鼠前额叶皮质小胶质细胞极性。通过小动物活体成像(IVIS)验证RVG-MSC-EXO在小鼠体内靶向性。
结果
2
过表达RVG的间充质干细胞外泌体对小鼠脑部具有靶向性。喹吡罗小鼠模型经过外泌体治疗后,强迫检查和埋珠行为改善,促炎因子减少、抗炎因子增加。外泌体治疗后喹吡罗模型小鼠前额叶皮层小胶质细胞极性由M1型转变为M2型。
结论
2
过表达RVG的间充质干细胞外泌体可靶向小鼠大脑,通过转变小胶质细胞极性以改善强迫症小鼠颅内炎症水平,最终减少强迫症小鼠的强迫样行为。
Objective
2
This study aimed to investigate the therapaeutic effects of rabies virus glycoprotein (RVG)-modified mesenchymal stem cell-derived exosomes (MSC-EXO) in a mouse model of obsessive-compulsive disorder (OCD), and to explore the underlying mechanisms.
Methods
2
Primary mouse adipose-derived MSCs were isolated and characterized by adipogenic and osteogenic differentiation assays and flow cytometry. RVG-overexpressing MSCs were generated, and the derived exosomes were characterized by nanoparticle size analysis, Western blotting, and transmission electron microscopy. An OCD mouse model was established using quinpirole, and the mice were divided into five groups: control, model, clomipramine(CMI), MSC-EXO, and RVG-MSC-EXO. Compulsive-like behaviors and cognitive function were evaluated using the compulsive checking test, open field test, marble-burying tes, and Morris water maze. The levels of inflammatory cytokines in the mouse prefrontal cortex were measured by qPCR and ELISA. Microglial polarization in the prefrontal cortex was assessed by immunofluorescence staining. The brain-targeting ability of RVG-MSC-EXO was verified using an in vivo imaging system (IVIS).
Results
2
RVG-modified MSC-derived exosomes exhibited significant brain-targeting ability in mice. Exosome treatment significantly reduced compulsive checking and marble-burying behaviors in mice. Exosome treatment decreased pro-inflammatory cytokines and increased anti-inflammatory cytokines. Exosome treatment promoted a shift in microglial polarization from the M1 phenotype to M2 phenotype.
Conclusion
2
RVG-modified mesenchymal stem cell-derived exosomes can target the mouse brain, alleviate neuroinflammation by promoting microglial polarization towards the M2 phenotype, and ultimately reduce compulsive-like behaviors in OCD mice.
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