Parkinson’s disease(PD)is a common neurodegenerative disorder with no cure.Astragalus membranaceus is used in Chinese culture as a food supplement to boost immunity.The present study aimed to explore the neuroprotect...Parkinson’s disease(PD)is a common neurodegenerative disorder with no cure.Astragalus membranaceus is used in Chinese culture as a food supplement to boost immunity.The present study aimed to explore the neuroprotective effects of total flavonoids extracted from A.membranaceus(TFA)and their protective mechanisms.TFA offered neuroprotection against 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine(MPTP)in the mouse model of Parkinsonism,by improving behavior performance in the gait analysis and pole test,and inhibiting the decline of tyrosine hydroxylase(TH)positive neurons and TH protein expression in substantia nigra of mice.TFA also prevented 1-methyl-4-phenylpyridinium(MPP+)induced neurotoxicity in SHSY5Y cells,by increasing GSH and GSH/GSSG ratio,and reducing reactive oxygen species.In addition,the neuroprotective effects of TFA were associated with its ability to restore MPTP/MPP+induced downregulation of SLC7A11 and glutathione peroxidase 4(GPX-4).In conclusion,we demonstrated that TFA exerted significant neuroprotection against MPTP/MPP+induced neurodegeneration by inhibiting ferroptosis through the regulation of SLC7A11/GPX-4 axis,suggesting the use of TFA as a possible food supplement in the prevention of PD.展开更多
缺血性脑卒中是中老年人致残及死亡的主要原因,完善脑卒中的治疗方案并改善患者的生活质量已然成为当今医学研究的热点。铁死亡是最新研究发现的细胞程序性死亡,对脑缺血-再灌注的发病机制有重要的调控作用,肿瘤抑制因子p53(Tumor Suppr...缺血性脑卒中是中老年人致残及死亡的主要原因,完善脑卒中的治疗方案并改善患者的生活质量已然成为当今医学研究的热点。铁死亡是最新研究发现的细胞程序性死亡,对脑缺血-再灌注的发病机制有重要的调控作用,肿瘤抑制因子p53(Tumor Suppressor Protein p53,P53)/溶质载体家族7成员11蛋白(Solute Carrier Family 7 Member 11,SLC7A11)是铁死亡过程中的重要信号传导通路,与缺血性脑卒中的生理病理息息相关,但目前关于此通路作用于缺血性脑卒中的机制仍需更多的循证医学证据。中药作为公认的多靶点治疗手段,是治疗缺血性脑卒中细胞铁死亡的一种手段,也对P53/SLC7A11信号传导通路发挥了关键的调控作用。但目前铁死亡参与缺血性脑卒中的作用机制未完全阐明,中药如何调控铁死亡相关信号通路尚处于探索阶段,随着相关研究的深入,中药作用于铁死亡信号通路的机制会更加清晰,中药复合提取物与中药活性物质可能是缺血性脑卒中铁死亡未来的研究方向和治疗前景。目前P53/SLC7A11信号传导通路研究以基础研究为主,随着研究的进展,应将基础研究与临床研究相结合,以期开展新药研发,为缺血性脑卒中提供新的治疗手段和途径。文章对P53/SLC7A11信号传导通路在缺血性脑卒中疾病中的调控过程以及中药对此信号传导通路所产生的效力进行综合性叙述,以期为缺血性脑卒中的临床治疗及预防提供新的策略。展开更多
文摘Parkinson’s disease(PD)is a common neurodegenerative disorder with no cure.Astragalus membranaceus is used in Chinese culture as a food supplement to boost immunity.The present study aimed to explore the neuroprotective effects of total flavonoids extracted from A.membranaceus(TFA)and their protective mechanisms.TFA offered neuroprotection against 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine(MPTP)in the mouse model of Parkinsonism,by improving behavior performance in the gait analysis and pole test,and inhibiting the decline of tyrosine hydroxylase(TH)positive neurons and TH protein expression in substantia nigra of mice.TFA also prevented 1-methyl-4-phenylpyridinium(MPP+)induced neurotoxicity in SHSY5Y cells,by increasing GSH and GSH/GSSG ratio,and reducing reactive oxygen species.In addition,the neuroprotective effects of TFA were associated with its ability to restore MPTP/MPP+induced downregulation of SLC7A11 and glutathione peroxidase 4(GPX-4).In conclusion,we demonstrated that TFA exerted significant neuroprotection against MPTP/MPP+induced neurodegeneration by inhibiting ferroptosis through the regulation of SLC7A11/GPX-4 axis,suggesting the use of TFA as a possible food supplement in the prevention of PD.
文摘缺血性脑卒中是中老年人致残及死亡的主要原因,完善脑卒中的治疗方案并改善患者的生活质量已然成为当今医学研究的热点。铁死亡是最新研究发现的细胞程序性死亡,对脑缺血-再灌注的发病机制有重要的调控作用,肿瘤抑制因子p53(Tumor Suppressor Protein p53,P53)/溶质载体家族7成员11蛋白(Solute Carrier Family 7 Member 11,SLC7A11)是铁死亡过程中的重要信号传导通路,与缺血性脑卒中的生理病理息息相关,但目前关于此通路作用于缺血性脑卒中的机制仍需更多的循证医学证据。中药作为公认的多靶点治疗手段,是治疗缺血性脑卒中细胞铁死亡的一种手段,也对P53/SLC7A11信号传导通路发挥了关键的调控作用。但目前铁死亡参与缺血性脑卒中的作用机制未完全阐明,中药如何调控铁死亡相关信号通路尚处于探索阶段,随着相关研究的深入,中药作用于铁死亡信号通路的机制会更加清晰,中药复合提取物与中药活性物质可能是缺血性脑卒中铁死亡未来的研究方向和治疗前景。目前P53/SLC7A11信号传导通路研究以基础研究为主,随着研究的进展,应将基础研究与临床研究相结合,以期开展新药研发,为缺血性脑卒中提供新的治疗手段和途径。文章对P53/SLC7A11信号传导通路在缺血性脑卒中疾病中的调控过程以及中药对此信号传导通路所产生的效力进行综合性叙述,以期为缺血性脑卒中的临床治疗及预防提供新的策略。