【目的】观察电针百会、风府、双侧肾俞穴联合人脐带间充质干细胞(hUC-MSCs)移植对缺血性脑损伤大鼠的脑保护作用及机制。【方法】将40只SD大鼠随机分为正常组、模型组、移植组、联合组,每组10只。除正常组,其他各组大鼠建立脑缺血再灌...【目的】观察电针百会、风府、双侧肾俞穴联合人脐带间充质干细胞(hUC-MSCs)移植对缺血性脑损伤大鼠的脑保护作用及机制。【方法】将40只SD大鼠随机分为正常组、模型组、移植组、联合组,每组10只。除正常组,其他各组大鼠建立脑缺血再灌注损伤模型。在造模结束24 h后,移植组大鼠给予0.5 m L 2×10^(6)个hUC-MSCs细胞悬液一次性尾静脉植入,联合组在移植组治疗基础上,给予电针百会穴、风府穴、双侧肾俞穴,每次30 min,每日1次,连续针刺3周。治疗结束后,苏木素-伊红(HE)染色法观察海马组织病理形态,脱氧核糖核苷酸末端转移酶介导的缺口末端标记(TUNEL)法观察脑组织细胞凋亡情况,免疫荧光法检测脑组织腺苷A2A受体(ADORA2A)表达,免疫组织化学法检测脑组织糖原合酶激酶3β(GSK-3β)、β-连环蛋白(β-catenin)表达,Western Blot法检测脑组织跨膜蛋白闭锁蛋白(Occludin)、胞质附着蛋白(ZO-1)表达。【结果】与正常组比较,模型组脑组织细胞凋亡率升高,脑组织ADORA2A阳性表达率及GSK-3β蛋白表达水平升高,Occludin、ZO-1、β-catenin蛋白表达水平降低(P<0.05),HE染色结果显示,模型组海马组织结构明显异常;与模型组比较,移植组和联合组大鼠脑组织细胞凋亡率降低,脑组织ADORA2A阳性表达率及GSK-3β蛋白表达水平降低,Occludin、ZO-1、β-catenin蛋白表达水平升高(P<0.05),海马组织病理程度明显减轻;与移植组比较,联合组脑组织细胞凋亡率降低,脑组织ADORA2A阳性表达率及GSK-3β蛋白表达水平降低,Occludin、ZO-1、β-catenin蛋白表达水平升高(P<0.05)。【结论】电针百会、风府、双侧肾俞穴联合hUC-MSCs可改善缺血性脑损伤大鼠血脑屏障,抑制脑组织ADORA2A、GSK-3β表达,提高β-catenin表达,抑制脑组织细胞凋亡,起到脑保护作用,且作用效果优于单纯hUC-MSCs移植。展开更多
Alzheimer’s disease is a prevalent and debilitating neurodegenerative condition that profoundly affects a patient’s daily functioning with progressive cognitive decline,which can be partly attributed to impaired hip...Alzheimer’s disease is a prevalent and debilitating neurodegenerative condition that profoundly affects a patient’s daily functioning with progressive cognitive decline,which can be partly attributed to impaired hippocampal neurogenesis.Neurogenesis in the hippocampal dentate gyrus is likely to persist throughout life but declines with aging,especially in Alzheimer’s disease.Recent evidence indicated that RNA-binding protein 8A(Rbm8a)promotes the proliferation of neural progenitor cells,with lower expression levels observed in Alzheimer’s disease patients compared with healthy people.This study investigated the hypothesis that Rbm8a overexpression may enhance neurogenesis by promoting the proliferation of neural progenitor cells to improve memory impairment in Alzheimer’s disease.Therefore,Rbm8a overexpression was induced in the dentate gyrus of 5×FAD mice to validate this hypothesis.Elevated Rbm8a levels in the dentate gyrus triggered neurogenesis and abated pathological phenotypes(such as plaque formation,gliosis reaction,and dystrophic neurites),leading to ameliorated memory performance in 5×FAD mice.RNA sequencing data further substantiated these findings,showing the enrichment of differentially expressed genes involved in biological processes including neurogenesis,cell proliferation,and amyloid protein formation.In conclusion,overexpressing Rbm8a in the dentate gyrus of 5×FAD mouse brains improved cognitive function by ameliorating amyloid-beta-associated pathological phenotypes and enhancing neurogenesis.展开更多
Abnormal placental angiogenesis is associated with the occurrence of intrauterine growth restriction(IUGR)in piglets,and effective treatment strategies against this occurrence remain to be explored.Adenosine has been ...Abnormal placental angiogenesis is associated with the occurrence of intrauterine growth restriction(IUGR)in piglets,and effective treatment strategies against this occurrence remain to be explored.Adenosine has been reported to play an important role in angiogenesis,but its role in placental angio-genesis is still unknown.Here,we investigated the effect of dietary adenosine supplementation on IUGR occurrence in piglets by analyzing the role of adenosine in placental angiogenesis for Normal and IUGR piglets.Specifically,88 sows were allotted to 2 treatments(n=44)and fed a basal diet supplemented with 0%or 0.1%of adenosine from day 65 of gestation until farrowing,followed by collecting the placental samples of Normal and IUGR piglets,and recording their characteristics.The results showed that adenosine supplementation increased the mean birth weight of piglets(P<0.05)and placental efficiency(P<0.05),while decreasing the IUGR piglet rate(P<0.05).Expectedly,the placenta for IUGR neonates showed a down-regulated vascular density(P<0.05)and angiogenesis as evidenced by the expression level of vascular cell adhesion molecule-1(VCAM1)(P<0.05).Notably,dietary adenosine supplementation promoted angiogenesis(P<0.05)both in the Normal and IUGR placenta.More importantly,the expression level of adenosine A2a receptor(ADORA2A)was lower(P<0.05)in the IUGR placenta than in Normal placenta,whereas adenosine treatment could significantly increase ADORA2A expression,and also had an interaction effect between factors IUGR and Ado.Collectively,placentae for IUGR piglets showed impaired angiogenesis and down-regulated expression level of ADORA2A,while dietary adenosine supplementation could activate ADORA2A expression,improve the placental angio-genesis,and ultimately decrease the occurrence of IUGR in piglets.展开更多
文摘【目的】观察电针百会、风府、双侧肾俞穴联合人脐带间充质干细胞(hUC-MSCs)移植对缺血性脑损伤大鼠的脑保护作用及机制。【方法】将40只SD大鼠随机分为正常组、模型组、移植组、联合组,每组10只。除正常组,其他各组大鼠建立脑缺血再灌注损伤模型。在造模结束24 h后,移植组大鼠给予0.5 m L 2×10^(6)个hUC-MSCs细胞悬液一次性尾静脉植入,联合组在移植组治疗基础上,给予电针百会穴、风府穴、双侧肾俞穴,每次30 min,每日1次,连续针刺3周。治疗结束后,苏木素-伊红(HE)染色法观察海马组织病理形态,脱氧核糖核苷酸末端转移酶介导的缺口末端标记(TUNEL)法观察脑组织细胞凋亡情况,免疫荧光法检测脑组织腺苷A2A受体(ADORA2A)表达,免疫组织化学法检测脑组织糖原合酶激酶3β(GSK-3β)、β-连环蛋白(β-catenin)表达,Western Blot法检测脑组织跨膜蛋白闭锁蛋白(Occludin)、胞质附着蛋白(ZO-1)表达。【结果】与正常组比较,模型组脑组织细胞凋亡率升高,脑组织ADORA2A阳性表达率及GSK-3β蛋白表达水平升高,Occludin、ZO-1、β-catenin蛋白表达水平降低(P<0.05),HE染色结果显示,模型组海马组织结构明显异常;与模型组比较,移植组和联合组大鼠脑组织细胞凋亡率降低,脑组织ADORA2A阳性表达率及GSK-3β蛋白表达水平降低,Occludin、ZO-1、β-catenin蛋白表达水平升高(P<0.05),海马组织病理程度明显减轻;与移植组比较,联合组脑组织细胞凋亡率降低,脑组织ADORA2A阳性表达率及GSK-3β蛋白表达水平降低,Occludin、ZO-1、β-catenin蛋白表达水平升高(P<0.05)。【结论】电针百会、风府、双侧肾俞穴联合hUC-MSCs可改善缺血性脑损伤大鼠血脑屏障,抑制脑组织ADORA2A、GSK-3β表达,提高β-catenin表达,抑制脑组织细胞凋亡,起到脑保护作用,且作用效果优于单纯hUC-MSCs移植。
基金supported by the National Natural Science Foundation of China,No.91849104(to YW)。
文摘Alzheimer’s disease is a prevalent and debilitating neurodegenerative condition that profoundly affects a patient’s daily functioning with progressive cognitive decline,which can be partly attributed to impaired hippocampal neurogenesis.Neurogenesis in the hippocampal dentate gyrus is likely to persist throughout life but declines with aging,especially in Alzheimer’s disease.Recent evidence indicated that RNA-binding protein 8A(Rbm8a)promotes the proliferation of neural progenitor cells,with lower expression levels observed in Alzheimer’s disease patients compared with healthy people.This study investigated the hypothesis that Rbm8a overexpression may enhance neurogenesis by promoting the proliferation of neural progenitor cells to improve memory impairment in Alzheimer’s disease.Therefore,Rbm8a overexpression was induced in the dentate gyrus of 5×FAD mice to validate this hypothesis.Elevated Rbm8a levels in the dentate gyrus triggered neurogenesis and abated pathological phenotypes(such as plaque formation,gliosis reaction,and dystrophic neurites),leading to ameliorated memory performance in 5×FAD mice.RNA sequencing data further substantiated these findings,showing the enrichment of differentially expressed genes involved in biological processes including neurogenesis,cell proliferation,and amyloid protein formation.In conclusion,overexpressing Rbm8a in the dentate gyrus of 5×FAD mouse brains improved cognitive function by ameliorating amyloid-beta-associated pathological phenotypes and enhancing neurogenesis.
基金supported by the National Key R&D Program of China(2021YFD1300401)Natural Science Foundation of Guangdong Province(2021A1515012116).
文摘Abnormal placental angiogenesis is associated with the occurrence of intrauterine growth restriction(IUGR)in piglets,and effective treatment strategies against this occurrence remain to be explored.Adenosine has been reported to play an important role in angiogenesis,but its role in placental angio-genesis is still unknown.Here,we investigated the effect of dietary adenosine supplementation on IUGR occurrence in piglets by analyzing the role of adenosine in placental angiogenesis for Normal and IUGR piglets.Specifically,88 sows were allotted to 2 treatments(n=44)and fed a basal diet supplemented with 0%or 0.1%of adenosine from day 65 of gestation until farrowing,followed by collecting the placental samples of Normal and IUGR piglets,and recording their characteristics.The results showed that adenosine supplementation increased the mean birth weight of piglets(P<0.05)and placental efficiency(P<0.05),while decreasing the IUGR piglet rate(P<0.05).Expectedly,the placenta for IUGR neonates showed a down-regulated vascular density(P<0.05)and angiogenesis as evidenced by the expression level of vascular cell adhesion molecule-1(VCAM1)(P<0.05).Notably,dietary adenosine supplementation promoted angiogenesis(P<0.05)both in the Normal and IUGR placenta.More importantly,the expression level of adenosine A2a receptor(ADORA2A)was lower(P<0.05)in the IUGR placenta than in Normal placenta,whereas adenosine treatment could significantly increase ADORA2A expression,and also had an interaction effect between factors IUGR and Ado.Collectively,placentae for IUGR piglets showed impaired angiogenesis and down-regulated expression level of ADORA2A,while dietary adenosine supplementation could activate ADORA2A expression,improve the placental angio-genesis,and ultimately decrease the occurrence of IUGR in piglets.
