Fat mass and obesity-mediated N^(6)-methyladenosine modification modulates neuroinflammatory responses after traumatic brain injury  

作　　者：Xiangrong Chen Jinqing Lai Zhe Wu Jianlong Chen Baoya Yang Chunnuan Chen Chenyu Ding 

机构地区：[1]Department of Neurosurgery,Second Clinical Medical College,Second Affiliated Hospital of Fujian Medical University,Quanzhou,Fujian Province,China [2]Department of Neurology,Second Clinical Medical College,Second Affiliated Hospital of Fujian Medical University,Quanzhou,Fujian Province,China [3]Department of Neurosurgery,Neurosurgery Research Institute,National Regional Medical Center,Binhai Campus,First Affiliated Hospital of Fujian Medical University,Fuzhou,Fujian Province,China

出　　处：《Neural Regeneration Research》2026年第2期730-741,共12页中国神经再生研究(英文版)

基　　金：supported by grants from the Major Projects of Health Science Research Foundation for Middle-Aged and Young Scientist of Fujian Province,China,No.2022ZQNZD01010010;the National Natural Science Foundation of China,No.82371390;Fujian Province Scientific Foundation,No.2023J01725(all to XC).

摘　　要：The neuroinflammatory response mediated by microglial activation plays an important role in the secondary nerve injury of traumatic brain injury.The post-transcriptional modification of N^(6)-methyladenosine is ubiquitous in the immune response of the central nervous system.The fat mass and obesity-related protein catalyzes the demethylation of N^(6)-methyladenosine modifications on mRNA and is widely expressed in various tissues,participating in the regulation of multiple diseases’biological processes.However,the role of fat mass and obesity in microglial activation and the subsequent neuroinflammatory response after traumatic brain injury is unclear.In this study,we found that the expression of fat mass and obesity was significantly down-regulated in both lipopolysaccharide-treated BV2 cells and a traumatic brain injury mouse model.After fat mass and obesity interference,BV2 cells exhibited a pro-inflammatory phenotype as shown by the increased proportion of CD11b^(+)/CD86^(+)cells and the secretion of pro-inflammatory cytokines.Fat mass and obesity-mediated N^(6)-methyladenosine demethylation accelerated the degradation of ADAM17 mRNA,while silencing of fat mass and obesity enhanced the stability of ADAM17 mRNA.Therefore,down-regulation of fat mass and obesity expression leads to the abnormally high expression of ADAM17 in microglia.These results indicate that the activation of microglia and neuroinflammatory response regulated by fat mass and obesity-related N^(6)-methyladenosine modification plays an important role in the pro-inflammatory process of secondary injury following traumatic brain injury.

关 键 词：ADAM17 epigenetic modification fat mass and obesity N6-methyladenosine MICROGLIA mRNA nerve injury NEUROINFLAMMATION traumatic brain injury tumor necrosis factorα 

分 类 号：R651.1[医药卫生—外科学]