Journal
JOURNAL OF EXPERIMENTAL MEDICINE
Volume 206, Issue 11, Pages 2351-2364Publisher
ROCKEFELLER UNIV PRESS
DOI: 10.1084/jem.20091436
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Funding
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT)
- Japan Society for the Promotion of Science for Graduate Students
- National Institute of Environmental Health Sciences [Z01-ES-101586]
- Grants-in-Aid for Scientific Research [21390092] Funding Source: KAKEN
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The eye is protected by the ocular immunosurveillance system. We show that tear duct associated lymphoid tissue (TALT) is located in the mouse lacrimal sac and shares immunological characteristics with mucosa-associated lymphoid tissues (MALTs), including the presence of M cells and immunocompetent cells for antigen uptake and subsequent generation of mucosal immune responses against ocularly encountered antigens and bacteria such as Pseudomonas aeruginosa. Initiation of TALT genesis began postnatally; it occurred even in germ-free conditions and was independent of signaling through organogenesis regulators, including inhibitor of DNA binding/ differentiation 2, retinoic acid-related orphan receptor gamma t, lymphotoxin (LT) alpha 1 beta 2-LT beta R, and lymphoid chemokines (CCL19, CCL21, and CXCL13). Thus, TALT shares immunological features with MALT but has a distinct tissue genesis mechanism and plays a key role in ocular immunity.
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