Sirtuin 2(SIRT2)inhibition or Sirt2 knocko ut in animal models protects against the development of neurodegenerative diseases and cerebral ischemia.However,the role of SIRT2 in traumatic brain injury(TBI)remains uncle...Sirtuin 2(SIRT2)inhibition or Sirt2 knocko ut in animal models protects against the development of neurodegenerative diseases and cerebral ischemia.However,the role of SIRT2 in traumatic brain injury(TBI)remains unclear.In this study,we found that knockout of Sirt2 in a mouse model of TBI reduced brain edema,attenuated dis ruption of the blood-brain barrie r,decreased expression of the nucleotide-binding oligomerization domain-like receptor protein 3(NLRP3)inflammasome,reduced the activity of the effector caspase-1,reduced neuroinflammation and neuronal pyroptosis,and improved neurological function.Knoc kout of Sirt2 in a mechanical stretch injury cell model in vitro also decreased expression of the NLRP3 inflammasome and pyroptosis.Our findings suggest that knockout of Sirt2 is neuro protective against TBI;therefore.Sirt2 could be a novel to rget for TBI treatment.展开更多
目的探讨慢病毒介导的沉默信息调节因子2(silent information regulator2,SIRT2)基因沉默对肝癌细胞的迁移和侵袭能力的影响。方法 Western blot分析SIRT2在多个肝癌细胞系和永生化肝细胞中的表达,通过慢病毒介导的shRNA干扰技术靶向沉...目的探讨慢病毒介导的沉默信息调节因子2(silent information regulator2,SIRT2)基因沉默对肝癌细胞的迁移和侵袭能力的影响。方法 Western blot分析SIRT2在多个肝癌细胞系和永生化肝细胞中的表达,通过慢病毒介导的shRNA干扰技术靶向沉默SIRT2的表达,并通过Real-time PCR和Western blot验证SIRT2基因的沉默效果。细胞迁移及侵袭实验检测SIRT2基因沉默对肝癌细胞迁移和侵袭能力的影响,Western blot检测上皮细胞间充质转化(epithelialmesenchymal transition,EMT)指标蛋白(E-cadherin、α-catenin、α-SMA、N-cadherin)的表达。结果 SIRT2在多个肝癌细胞系中蛋白表达水平明显上调;慢病毒介导的shRNA能显著抑制细胞SIRT2的表达水平(P<0.05)。SIRT2基因沉默能抑制肝癌细胞的迁移和侵袭能力(P<0.01),并使上皮属性蛋白E-cadherin、α-catenin表达水平升高,使间质属性蛋白α-SMA、N-cadherin表达水平降低。结论 SIRT2基因沉默可以通过抑制肝癌细胞上皮细胞间充质转化从而抑制肝癌细胞的迁移和侵袭能力。展开更多
基金supported by the National Nature Science Foundation of China,Nos.81671207 and 81974189(both to HLT)。
文摘Sirtuin 2(SIRT2)inhibition or Sirt2 knocko ut in animal models protects against the development of neurodegenerative diseases and cerebral ischemia.However,the role of SIRT2 in traumatic brain injury(TBI)remains unclear.In this study,we found that knockout of Sirt2 in a mouse model of TBI reduced brain edema,attenuated dis ruption of the blood-brain barrie r,decreased expression of the nucleotide-binding oligomerization domain-like receptor protein 3(NLRP3)inflammasome,reduced the activity of the effector caspase-1,reduced neuroinflammation and neuronal pyroptosis,and improved neurological function.Knoc kout of Sirt2 in a mechanical stretch injury cell model in vitro also decreased expression of the NLRP3 inflammasome and pyroptosis.Our findings suggest that knockout of Sirt2 is neuro protective against TBI;therefore.Sirt2 could be a novel to rget for TBI treatment.
