Lymphoid tissue inducer cells: bridges between the ancient innate and the modern adaptive immune systems

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Colleges, School and Institutes

Abstract

Phylogeny indicates that adaptive immunity evolved first in diffusely distributed lymphoid tissues found in the lamina propria (LP) of the gut. B follicular structures appeared later, probably initially in isolated lymphoid follicles in the LP and then in organized lymphoid tissues such as lymph nodes and Peyer's patches. The development of these new lymphoid structures was enabled by gene duplication and evolution of new tumor necrosis family members. Here, we argue that lymphoid tissue inducer cells (LTis) had a pivotal role, not only in the development of organized lymphoid structures, but also in the subsequent genesis of the CD4-dependent class-switched memory antibody responses. In this review, we concentrate on the latter function: the sustenance by LTis of CD4 T-cell responses for protective immunity.

Details

Original languageEnglish
Pages (from-to)472-7
Number of pages6
JournalMucosal immunology
Volume2
Issue number6
Publication statusPublished - 1 Nov 2009