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-Structure paper
タイトル | A brain-to-gut signal controls intestinal fat absorption. |
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ジャーナル・号・ページ | Nature, Year 2024 |
掲載日 | 2024年9月11日 |
著者 | Qianqian Lyu / Wenzhi Xue / Ruixin Liu / Qinyun Ma / Vikram Babu Kasaragod / Shan Sun / Qian Li / Yanru Chen / Mingyang Yuan / Yuying Yang / Bing Zhang / Aifang Nie / Sheng Jia / Chongrong Shen / Po Gao / Weifang Rong / Chenxi Yu / Yufang Bi / Chunlei Zhang / Fajun Nan / Guang Ning / Zihe Rao / Xiuna Yang / Jiqiu Wang / Weiqing Wang / |
PubMed 要旨 | Although fat is a crucial source of energy in diets, excessive intake leads to obesity. Fat absorption in the gut is prevailingly thought to occur organ-autonomously by diffusion. Whether the ...Although fat is a crucial source of energy in diets, excessive intake leads to obesity. Fat absorption in the gut is prevailingly thought to occur organ-autonomously by diffusion. Whether the process is controlled by the brain-to-gut axis, however, remains largely unknown. Here we demonstrate that the dorsal motor nucleus of vagus (DMV) plays a key part in this process. Inactivation of DMV neurons reduces intestinal fat absorption and consequently causes weight loss, whereas activation of the DMV increases fat absorption and weight gain. Notably, the inactivation of a subpopulation of DMV neurons that project to the jejunum shortens the length of microvilli, thereby reducing fat absorption. Moreover, we identify a natural compound, puerarin, that mimics the suppression of the DMV-vagus pathway, which in turn leads to reduced fat absorption. Photoaffinity chemical methods and cryogenic electron microscopy of the structure of a GABA receptor-puerarin complex reveal that puerarin binds to an allosteric modulatory site. Notably, conditional Gabra1 knockout in the DMV largely abolishes puerarin-induced intestinal fat loss. In summary, we discover that suppression of the DMV-vagus-jejunum axis controls intestinal fat absorption by shortening the length of microvilli and illustrate the therapeutic potential of puerarin binding to GABRA1 in fat loss. |
リンク | Nature / PubMed:39261733 |
手法 | EM (単粒子) |
解像度 | 2.4 Å |
構造データ | EMDB-19907, PDB-9eqg: |
化合物 | ChemComp-PGW: ChemComp-D10: ChemComp-HEX: ChemComp-PT5: ChemComp-R16: ChemComp-PLM: ChemComp-CL: ChemComp-ABU: ChemComp-NAG:
PDB-1h6w: Unknown entry ChemComp-PX2: ChemComp-HOH: |
由来 |
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キーワード | MEMBRANE PROTEIN / GABA(A) receptor / Inhibitory synapse / GABA / Puerarin / Fat regulation |