2025/05/18 by Stefan Halvorsen, Molly Thomas, Mari Mino–Kenudson +20 · 1 voice
Medicine · #Genetic factors in colorectal cancer #Microscopic Colitis #Whipple's Disease and Interleukins
paper · pdf · doi:10.1038/s41467-025-59648-8
openalex publication_date 2025/05/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/23
Abstract Microscopic colitis (MC) is a chronic inflammatory disease of the large intestine and a common cause of chronic diarrhea in older adults. Here, we use single-cell RNA sequencing analysis of colonic mucosal tissue to build a cellular and molecular model for MC. Our results show that in MC, there is a substantial expansion of tissue CD8 + T cells, likely arising from local expansion following T cell receptor engagement. Within the T cell compartment, MC is characterized by a shift in CD8 tissue-resident memory T cells towards a highly cytotoxic and inflammatory phenotype and expansion of CD4 + T regulatory cells. These results provide insight into inflammatory cytokines shaping MC pathogenesis and highlight notable similarities and differences with other immune-mediated intestinal diseases, including a common upregulation of IL26 and an MC-specific upregulation of IL10 . These data help identify targets against enteric T cell subsets as an effective strategy for treatment of MC.