연구성과 홍보

J Clin Invest. 2025 Jul 15;135(18):e183093.

Title : NFAT5 dictates crosstalk between intestinal epithelial regenerative capacity and microbiota in murine colitis models

Authors : Se-Hyeon Park1,2, Dae Hee Cheon3,4, Yu-Mi Kim1,2, Yeji Choi3,4, Yong-Joon Cho5,6, Bong-Ki Hong1,2, Sang-Hyun Cho7, Mi-Na Kweon8, Hyug Moo Kwon9, Eugene B Chang10, Donghyun Kim3,4,11,12*, Wan-Uk Kim1,2,13*

Affiliations :

1Center for Integrative Rheumatoid Transcriptomics and Dynamics.

2Department of Biomedicine and Health Sciences, The Catholic University of Korea, Seoul, South Korea.

3Department of Biomedical Sciences.

4Department of Microbiology and Immunology, Seoul National University (SNU) College of Medicine, Seoul, South Korea.

5Department of Molecular Bioscience.

6Multidimensional Genomics Research Center, Kangwon National University, Chuncheon, South Korea.

7School of Biological Sciences, SNU, Seoul, South Korea.

8Mucosal Immunology Laboratory, Department of Convergence Medicine, University of Ulsan College of Medicine/Asan Medical Center, Seoul, South Korea.

9Department of Biological Sciences, Ulsan National Institute of Science and Technology, Ulsan, South Korea.

10Department of Medicine, University of Chicago IBD Research Center, Chicago, Illinois, USA.

11Institute of Endemic Diseases, SNU Medical Research Center, Seoul, South Korea.

12Institute of Cancer Research, SNU, Seoul, South Korea.

13Division of Rheumatology, Department of Internal Medicine, the Catholic University of Korea, Seoul, South Korea.

DOI: 10.1172/JCI183093.

Abstract :

Hypertonic and hyperosmolar stimuli frequently pose challenges to the intestinal tract. Therefore, a resilient epithelial barrier is essential for maintaining gut homeostasis in the presence of osmotic perturbations. Nuclear factor of activated T cells 5 (NFAT5), an osmosensitive transcription factor, primarily maintains cellular homeostasis under hypertonic conditions. However, the osmoprotective role of NFAT5 in enterocyte homeostasis is poorly understood. Here, we demonstrate that NFAT5 was critical for the survival and proliferation of intestinal epithelial cells (IECs) and that its deficiency accelerated chemically induced or spontaneous colitis in mice. Mechanistically, NFAT5 promoted the survival of IECs and the renewal of intestinal stem cells, thereby regulating the production of mucus and antimicrobial compounds, including RegIII and lysozyme, which consequently shape the gut microbial composition to prevent colitis. Transcriptome analysis identified HSP70 as a key downstream target of NFAT5 in epithelial regeneration. Loss- and gain-of-function experiments involving HSP70 revealed that NFAT5 mitigated experimental colitis through IEC Hsp70, which protected stem cells from inflammation-induced injury and maintained barrier function. In conclusion, our study demonstrates what we believe to be a previously unknown role for NFAT5 in dictating the crosstalk between intestinal stem cells and the microbiota, underscoring the importance of the NFAT5/HSP70 axis in maintaining epithelial regeneration related to gut barrier function, balancing microbial composition, and subsequently preventing colitis progression.