中国博后一作，类器官之父最新Nature论文：人类肠道M细胞与树突状细胞类似，发挥抗原呈递作用

Core Viewpoint - The research on human M cells reveals their dual role in antigen transport and active antigen presentation, suggesting they may play a significant role in autoimmune diseases like celiac disease, thus providing new therapeutic targets and insights into intestinal mucosal immunity [2][26]. Group 1: Understanding M Cells - M cells are rare epithelial cells in the Peyer's patches of the intestine, traditionally viewed as specialized antigen transporters that deliver antigens to immune cells [8]. - The study led by Hans Clevers and Wang Daisong utilized human intestinal organoid technology to cultivate and analyze human M cells, uncovering their complex functions [11][13]. - Human M cells exhibit gene expression profiles similar to dendritic cells, indicating they can actively capture, process, and present antigens to T cells, thus acting as immune "activators" [15][16]. Group 2: Role in Celiac Disease - The research identified M cells as key players in celiac disease, where gluten proteins trigger an immune response [17][24]. - M cells were shown to process gluten antigens and present them via HLA-DQ2.5 molecules, leading to T cell activation [19][21]. - M cells also express transglutaminase 2 (TGM2), which modifies gluten proteins, enhancing their pathogenicity and contributing to the inflammatory response in celiac disease [24]. Group 3: Implications for Future Research - This study transforms the understanding of M cells and intestinal mucosal immunity, suggesting they are specialized antigen-presenting cells derived from epithelial sources [26]. - It opens avenues for developing targeted therapies for celiac disease and food allergies by focusing on M cell functions and TGM2 activity, potentially allowing for precise interventions without compromising overall immunity [26]. - The findings emphasize the need for careful consideration of species differences when translating mouse model research to human clinical applications [26].