TY - JOUR TI - MAP3K2-regulated intestinal stromal cells define a distinct stem cell niche AU - Wu, Ningbo AU - Sun, Hongxiang AU - Zhao, Xiaoyun AU - Zhang, Yao AU - Tan, Jianmei AU - Qi, Yuanyuan AU - Wang, Qun AU - Ng, Melissa AU - Liu, Zhaoyuan AU - He, Lingjuan AU - Niu, Xiaoyin AU - Chen, Lei AU - Liu, Zhiduo AU - Li, Hua-Bing AU - Zeng, Yi Arial AU - Roulis, Manolis AU - Liu, Dou AU - Cheng, Jinke AU - Zhou, Bin AU - Ng, Lai Guan AU - Zou, Duowu AU - Ye, Youqiong AU - Flavell, Richard A. AU - Ginhoux, Florent AU - Su, Bing T2 - Nature AB - Intestinal stromal cells are known to modulate the propagation and differentiation of intestinal stem cells1,2. However, the precise cellular and molecular mechanisms by which this diverse stromal cell population maintains tissue homeostasis and repair are poorly understood. Here we describe a subset of intestinal stromal cells, named MAP3K2-regulated intestinal stromal cells (MRISCs), and show that they are the primary cellular source of the WNT agonist R-spondin 1 following intestinal injury in mice. MRISCs, which are epigenetically and transcriptomically distinct from subsets of intestinal stromal cells that have previously been reported3–6, are strategically localized at the bases of colon crypts, and function to maintain LGR5+ intestinal stem cells and protect against acute intestinal damage through enhanced R-spondin 1 production. Mechanistically, this MAP3K2 specific function is mediated by a previously unknown reactive oxygen species (ROS)–MAP3K2–ERK5–KLF2 axis to enhance production of R-spondin 1. Our results identify MRISCs as a key component of an intestinal stem cell niche that specifically depends on MAP3K2 to augment WNT signalling for the regeneration of damaged intestine. DA - 2021/03/03/ PY - 2021 DO - 10.1038/s41586-021-03283-y DP - www.nature.com SP - 1 EP - 5 LA - en SN - 1476-4687 UR - https://www.nature.com/articles/s41586-021-03283-y Y2 - 2021/03/03/20:21:41 ER -