Epigenetic Enhancement of Brain-Derived Neurotrophic Factor Signaling Pathway Improves Cognitive Impairments Induced by Isoflurane Exposure in Aged Rats

被引：86

作者：

Ji, MuHuo ^{[1
]}

Dong, Lin ^{[1
]}

Jia, Min ^{[1
]}

Liu, WenXue ^{[1
]}

Zhang, MingQiang ^{[1
]}

Ju, LinSha ^{[1
]}

Yang, JiaoJiao ^{[1
]}

Xie, Zhongcong ^{[2
,3
]}

Yang, JianJun ^{[1
]}

机构：

[1] Nanjing Univ, Sch Med, Jinling Hosp, Dept Anesthesiol, Nanjing 210008, Jiangsu, Peoples R China

[2] Massachusetts Gen Hosp, Dept Anesthesia Crit Care & Pain Med, Geriatr Anesthesia Res Unit, Charlestown, MA 02129 USA

[3] Harvard Univ, Sch Med, Charlestown, MA 02129 USA

来源：

MOLECULAR NEUROBIOLOGY | 2014年 / 50卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Cognition; Histone acetylation; Brain-derived neurotrophic factor; Inflammation; Apoptosis; MOUSE MODEL; GENERAL-ANESTHESIA; MEMORY IMPAIRMENT; DYSFUNCTION; ADULT; NEUROGENESIS; DESFLURANE; INHIBITORS; DEFICITS;

D O I：

10.1007/s12035-014-8659-z

中图分类号：

Q189 [神经科学];

学科分类号：

071006 [神经生物学];

摘要：

Isoflurane-induced cognitive impairments are well documented in animal models; yet, the molecular mechanisms remain largely to be determined. In the present study, 22-month-old male Sprague-Dawley rats received 2 h of 1.5 % isoflurane or 100 % oxygen daily for 3 consecutive days. For the intervention study, the rats were intraperitoneally injected with 1.2 g/kg sodium butyrate 2 h before isoflurane exposure. Our data showed that repeated isoflurane exposure significantly decreased the freezing time to context and the freezing time to tone in the fear conditioning test, which was associated with upregulated histone deacetylase 2, reduced histone acetylation, and increased inflammation and apoptosis in the hippocampus, and impairments of brain-derived neurotrophic factor (BDNF)-tyrosine kinase receptor B (TrkB) and the downstream signaling pathway phospho-calmodulin-dependent protein kinase and phospho-cAMP response element-binding protein. These results suggest that isoflurane-induced cognitive impairments are associated with the declines in chromatin histone acetylation and the resulting downregulation of BDNF-TrkB signaling pathway. Moreover, the cognitive impairments and the signaling deficits can be rescued by histone deacetylase inhibitor sodium butyrate. Therefore, epigenetic enhancement of BDNF-TrkB signaling may be a promising strategy for reversing isoflurane-induced cognitive impairments.

引用

页码：937 / 944

页数：8

共 33 条

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