目的·探讨磷脂酰乙醇胺(phosphatidylethanolamine,PE)对巨噬细胞衰老及其衰老相关分泌表型的影响和分子机制,以及PE在肝损伤中的病理生理学意义。方法·利用阿霉素建立巨噬细胞衰老模型,并给予PE处理。通过腹腔联合注射PE和...目的·探讨磷脂酰乙醇胺(phosphatidylethanolamine,PE)对巨噬细胞衰老及其衰老相关分泌表型的影响和分子机制,以及PE在肝损伤中的病理生理学意义。方法·利用阿霉素建立巨噬细胞衰老模型,并给予PE处理。通过腹腔联合注射PE和脂多糖构建小鼠肝损伤模型,观察PE对肝损伤的影响。采用衰老相关β-半乳糖苷酶(senescence-associatedβ-galactosidase,SA-β-gal)染色,结合实时荧光定量PCR、Western blotting等检测细胞周期抑制蛋白p21、肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)和白介素-6(interleukin-6,IL-6)等衰老标志物及衰老相关分泌表型生物活性因子的表达水平。通过RNA测序结合基因本体论(Gene Ontology,GO)细胞组分富集分析、京都基因与基因组百科全书(Kyoto Encyclopedia of Genes and Genomes,KEGG)通路富集分析、基因集变异分析(Gene Set Variation Analysis,GSVA)和基因集富集分析(Gene Set Enrichment Analysis,GSEA)筛选PE促进巨噬细胞衰老的信号通路及分子机制。通过体内和体外实验检测内质网应激相关通路中肌醇需求酶1α(inositol requiring enzyme 1α,IRE1α)、剪接型X盒结合蛋白1(spliced X box binding protein 1,XBP1s)、转录激活因子6(activating transcription factor 6,ATF6)、ATF4、C/EBP同源蛋白(C/EBP homologous protein,CHOP)的表达。结果·PE显著促进巨噬细胞衰老标志物SA-β-gal、p21、p16及衰老相关分泌表型生物活性因子的表达。RNA测序分析显示内质网应激参与PE促进衰老相关分泌表型表达的作用。进一步的实验表明,PE通过激活巨噬细胞内质网应激信号通路促进巨噬细胞衰老及衰老相关分泌表型表达。体内实验证实PE通过内质网应激加剧脂多糖诱导的小鼠肝损伤。结论·PE通过激活内质网应激信号通路,促进巨噬细胞衰老及衰老相关分泌表型生物活性因子分泌,进而加重脂多糖诱导的肝损伤。展开更多
OBJECTIVE To observe the anti-aging effects of SOD mimic AEOL^(-1)0150 in antisenescence accelerated mouse resistant 1(SAMR1)strain.METHODS The lifespan of SAMR1 mice were observed by subcutaneous injection AEOL^(-1)0...OBJECTIVE To observe the anti-aging effects of SOD mimic AEOL^(-1)0150 in antisenescence accelerated mouse resistant 1(SAMR1)strain.METHODS The lifespan of SAMR1 mice were observed by subcutaneous injection AEOL^(-1)0150 2 mg·kg-1once a week.Morris water maze,new object recognition,nesting and forced swimming were used to observe the behavioral changes of animals.Lymphocyte subgroups and ROS were measured by Flow cytometry.The cytokines levels were determined by Luminex method.The number of DCX+neurons in brain tissue was observed by immunofluorescence.RESULTS The results showed that AEOL^(-1)0150 could prolong the mean lifespan of SAMR1 mice,but it had no obvious effect on maximal lifespan.What′s more,AEOL^(-1)0150 could significantly improve the spatial learning memory of aged mice,but it could not increase the number of DCX+neurons in the hypothalamic MBH and hippocampal DG regions.Then,we observed the effects of AEOL^(-1)0150 on peripheral blood lymphocyte subgroups and cytokines.We found that AEOL^(-1)0150significantly modulated the lymphocyte subgroups and cytokine release.Especially,AEOL^(-1)0150 can dose-dependently inhibit plasma levels of SASP related inflammatory cytokines TNF-αand IL^(-1)7.CONCLUSION The results indicate that AEOL^(-1)0150 has anti-aging effects,and the effects are closely related to modulating immunity and inhibiting SASP production.展开更多
文摘目的·探讨磷脂酰乙醇胺(phosphatidylethanolamine,PE)对巨噬细胞衰老及其衰老相关分泌表型的影响和分子机制,以及PE在肝损伤中的病理生理学意义。方法·利用阿霉素建立巨噬细胞衰老模型,并给予PE处理。通过腹腔联合注射PE和脂多糖构建小鼠肝损伤模型,观察PE对肝损伤的影响。采用衰老相关β-半乳糖苷酶(senescence-associatedβ-galactosidase,SA-β-gal)染色,结合实时荧光定量PCR、Western blotting等检测细胞周期抑制蛋白p21、肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)和白介素-6(interleukin-6,IL-6)等衰老标志物及衰老相关分泌表型生物活性因子的表达水平。通过RNA测序结合基因本体论(Gene Ontology,GO)细胞组分富集分析、京都基因与基因组百科全书(Kyoto Encyclopedia of Genes and Genomes,KEGG)通路富集分析、基因集变异分析(Gene Set Variation Analysis,GSVA)和基因集富集分析(Gene Set Enrichment Analysis,GSEA)筛选PE促进巨噬细胞衰老的信号通路及分子机制。通过体内和体外实验检测内质网应激相关通路中肌醇需求酶1α(inositol requiring enzyme 1α,IRE1α)、剪接型X盒结合蛋白1(spliced X box binding protein 1,XBP1s)、转录激活因子6(activating transcription factor 6,ATF6)、ATF4、C/EBP同源蛋白(C/EBP homologous protein,CHOP)的表达。结果·PE显著促进巨噬细胞衰老标志物SA-β-gal、p21、p16及衰老相关分泌表型生物活性因子的表达。RNA测序分析显示内质网应激参与PE促进衰老相关分泌表型表达的作用。进一步的实验表明,PE通过激活巨噬细胞内质网应激信号通路促进巨噬细胞衰老及衰老相关分泌表型表达。体内实验证实PE通过内质网应激加剧脂多糖诱导的小鼠肝损伤。结论·PE通过激活内质网应激信号通路,促进巨噬细胞衰老及衰老相关分泌表型生物活性因子分泌,进而加重脂多糖诱导的肝损伤。
基金supported by Chinese Scientific and Technological Major Special Project(2014ZX09J13103-01B-003 and 2014ZX09J15104002)
文摘OBJECTIVE To observe the anti-aging effects of SOD mimic AEOL^(-1)0150 in antisenescence accelerated mouse resistant 1(SAMR1)strain.METHODS The lifespan of SAMR1 mice were observed by subcutaneous injection AEOL^(-1)0150 2 mg·kg-1once a week.Morris water maze,new object recognition,nesting and forced swimming were used to observe the behavioral changes of animals.Lymphocyte subgroups and ROS were measured by Flow cytometry.The cytokines levels were determined by Luminex method.The number of DCX+neurons in brain tissue was observed by immunofluorescence.RESULTS The results showed that AEOL^(-1)0150 could prolong the mean lifespan of SAMR1 mice,but it had no obvious effect on maximal lifespan.What′s more,AEOL^(-1)0150 could significantly improve the spatial learning memory of aged mice,but it could not increase the number of DCX+neurons in the hypothalamic MBH and hippocampal DG regions.Then,we observed the effects of AEOL^(-1)0150 on peripheral blood lymphocyte subgroups and cytokines.We found that AEOL^(-1)0150significantly modulated the lymphocyte subgroups and cytokine release.Especially,AEOL^(-1)0150 can dose-dependently inhibit plasma levels of SASP related inflammatory cytokines TNF-αand IL^(-1)7.CONCLUSION The results indicate that AEOL^(-1)0150 has anti-aging effects,and the effects are closely related to modulating immunity and inhibiting SASP production.
