National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)
R01HL153219
米国
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)
R01NS129804
米国
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)
R01NS111031
米国
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)
R01NS112363
米国
Other private
McKnight Scholar Award
Other private
Klingenstein-Simon Scholar Award
Other private
Sloan Research Fellowship
Other private
Pew Scholar in the Biomedical Sciences
American Heart Association
24POST1196982
米国
引用
ジャーナル: Nat Commun / 年: 2026 タイトル: Noncanonical calcium-independent TRPM4 activation governs intestinal fluid homeostasis. 著者: Yaru Liu / Jinhong Hu / Chu Xue / Wenjie Huang / Sofia Ievleva / Wei Lü / Juan Du / Zhengyu Cao / 要旨: Imbalance in intestinal fluid homeostasis leads to nutrient malabsorption, intestinal tissue destruction, and systemic inflammation. Transient receptor potential melastatin 4 (TRPM4) is a calcium- ...Imbalance in intestinal fluid homeostasis leads to nutrient malabsorption, intestinal tissue destruction, and systemic inflammation. Transient receptor potential melastatin 4 (TRPM4) is a calcium-activated, non-selective monovalent cation channel converting chemical signals (Ca) into electrical signals (membrane depolarization). Here, we show the TRPM4 channel as a direct target of bisacodyl (BIC), a widely used clinical drug for chronic constipation management, and its active metabolite, deacetyl bisacodyl (DAB). DAB-induced laxative effects are abolished in global and intestinal epithelium-specific TRPM4-knockout mice, establishing the essential role of TRPM4 in intestinal fluid regulation. Furthermore, our structural work reveals DAB bound to an uncharacterized pocket, marking it as a non-Ca TRPM4 agonist and unveiling a noncanonical Ca-independent activation mechanism. Additionally, we delineate a signaling axis, TRPM4 → VGCC/NCX → ANO1, that governs ion homeostasis in the epithelium. Together, these findings establish TRPM4 as a key regulator of intestinal fluid balance and reveal its noncanonical calcium-independent activation as a therapeutic strategy for constipation.