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The IL-33/ST2 Axis Affects Adipogenesis Through Regulating the TRAF6/RelA Pathway

文献类型： 外文期刊

作者： Cao, Shujun 1 ; Qin, Xuyong 1 ; Li, Chengping 1 ; Zhang, Lichun 2 ; Ren, Shizhong 1 ; Zhou, Wenhao 1 ; Zhao, Meiman 1 ; Zhou, Guoli 1 ;

作者机构： 1.Liaocheng Univ, Coll Agr & Biol, Liaocheng 252000, Peoples R China

2.Jilin Acad Agr Sci, Inst Anim Biotechnol, Gongzhuling 136100, Peoples R China

关键词： IL-33/ST2 axis; signaling pathways; adipogenesis; TRAF6; RelA

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：4.9； 五年影响因子：5.7 ）

ISSN： 1661-6596

年卷期： 2024 年 25 卷 22 期

页码：

收录情况： SCI

摘要： Understanding the regulatory mechanisms of adipogenesis is essential for preventing obesity. Interleukin-33 (IL-33) has recently attracted increasing attention for its role in adipogenesis. The purpose of this study was to explore the function and regulatory mechanism of IL-33 and its receptor suppression of tumorigenicity 2 (ST2) on adipogenesis. Here, Oil Red O staining was used to detect the accumulation of intracellular lipid droplets. Molecular techniques such as qRT-PCR and Western blotting were used to detect the expression of pivotal genes and adipogenic marker genes. Gains and losses of function experiments were used to explore the potential regulatory mechanism of the IL-33/ST2 axis in adipogenesis. Functionally, IL-33 is negatively associated with adipogenesis in 3T3-L1 preadipocytes, while ST2 is positively associated with it, encompassing both the trans-membrane receptor ST2 (ST2L) and the soluble ST2 (sST2). Mechanistically, the IL-33/ST2 axis affects adipogenesis by regulating the expression of the TRAF6/RelA pathway in 3T3-L1 preadipocytes. Downregulating the expression of ST2 suppressed the activation of the IL-33/ST2 axis, which subsequently inhibits the expression of TRAF6. This further attenuates the expression of RelA, ultimately resulting in the suppression of adipogenesis in 3T3-L1 preadipocytes. This study reveals a new mechanism by which the IL-33/ST2 axis regulates the differentiation of preadipocytes and provides a new idea for improving obesity prevention.

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