Immune Profiling of Human Gut-Associated Lymphoid Tissue Identifies a Role for Isolated Lymphoid Follicles in Priming of Region-Specific Immunity

Research output: Contribution to journalArticle

Abstract

The intestine contains some of the most diverse and complex immune compartments in the body. Here we describe a method for isolating human gut-associated lymphoid tissues (GALTs) that allows unprecedented profiling of the adaptive immune system in submucosal and mucosal isolated lymphoid follicles (SM-ILFs and M-ILFs, respectively) as well as in GALT-free intestinal lamina propria (LP). SM-ILF and M-ILF showed distinct patterns of distribution along the length of the intestine, were linked to the systemic circulation through MAdCAM-1+ high endothelial venules and efferent lymphatics, and had immune profiles consistent with immune-inductive sites. IgA sequencing analysis indicated that human ILFs are sites where intestinal adaptive immune responses are initiated in an anatomically restricted manner. Our findings position ILFs as key inductive hubs for regional immunity in the human intestine, and the methods presented will allow future assessment of these compartments in health and disease.

Details

Authors
Organisations
External organisations
  • Technical University of Denmark
  • University of Copenhagen
  • Stanford University
  • Herlev Hospital
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Genetics
  • Microbiology in the medical area

Keywords

  • colon, human intestinal regional mucosal follicles, IgA, iIeum, ILF, PP
Original languageEnglish
Pages (from-to)557-570
Number of pages21
JournalImmunity
Volume52
Issue number3
Publication statusPublished - 2020 Mar 17
Publication categoryResearch
Peer-reviewedYes