m^(6)A demethylase FTO regulate CTNNB1 to promote adipogenesis of chicken preadipocyte  

作　　者：Kan Li Weichen Huang Zhijun Wang Qinghua Nie 

机构地区：[1]Department of Animal Genetics,Breeding and Reproduction,College of Animal Science,South China Agricultural University,Guangzhou 510642,China [2]National‑Local Joint Engineering Research Center for Livestock Breeding,Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding,and Key Laboratory of Chicken Genetics,Breeding and Reproduction,Ministry of Agriculture,Guangzhou 510642,China

出　　处：《Journal of Animal Science and Biotechnology》2023年第2期578-592,共15页畜牧与生物技术杂志（英文版）

基　　金：funded by the Natural Scientific Foundation of China(U1901206);Local Innovative and Research Teams Project of Guangdong Province(2019BT02N630);the Science and Technology Program of Guangdong province,China(2020B1212060060);the Science and Technology Program of Guangzhou,China(202103000084);the Construction Project of Modern Agricultural Science and Technology Innovation Alliance in Guangdong Province(2021KJ128);National Key R&D Program of China(2021YFD1300100);China Agriculture Research System(CARS-41-G03).

摘　　要：Background:N6-methyladenosine(m^(6)A)is an abundant post-transcriptional RNA modification that affects various biological processes.The fat mass and obesity-associated(FTO)protein,a demethylase encoded by the FTO gene,has been found to regulate adipocyte development in an m^(6)A-dependent manner in multiple species.However,the effects of the m^(6)A methylation and FTO demethylation functions on chicken adipogenesis remain unclear.This study aims to explore the association between m^(6)A modification and chicken adipogenesis and the underlying mechanism by which FTO affects chicken preadipocyte development.Results:The association between m^(6)A modification and chicken lipogenesis was assessed by treating chicken pread-ipocytes with different doses of methyl donor betaine and methylation inhibitor cycloleucine.The results showed that betaine significantly increased methylation levels and inhibited lipogenesis,and the inverse effect was found in preadipocytes after cycloleucine treatment.Overexpression of FTO significantly inhibited m^(6)A levels and promoted proliferation and differentiation of chicken preadipocytes.Silencing FTO showed opposite results.Mechanistically,FTO overexpression increased the expression of catenin beta 1(CTNNB1)by improving RNA stability in an m^(6)A-dependent manner,and we proved that FTO could directly target CTNNB1.Furthermore,CTNNB1 may be a positive regulator of adipogenesis in chicken preadipocytes.Conclusions:m^(6)A methylation of RNA was negatively associated with adipogenesis of chicken preadipocytes.FTO could regulate CTNNB1 expression in a demethylation manner to promote lipogenesis.

关 键 词：ADIPOGENESIS CHICKEN CTNNB1 FTO m^(6)A 

分 类 号：S852.2[农业科学—基础兽医学]