1. Artery Tertiary Lymphoid Organs Control Aorta Immunity and Protect against Atherosclerosis via Vascular Smooth Muscle Cell Lymphotoxin β Receptors.
- Author
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Hu, Desheng, Mohanta, Sarajo K., Yin, Changjun, Peng, Li, Ma, Zhe, Srikakulapu, Prasad, Grassia, Gianluca, MacRitchie, Neil, Dever, Gary, Gordon, Peter, Burton, Francis L., Ialenti, Armando, Sabir, Suleman R., McInnes, Iain B., Brewer, James M., Garside, Paul, Weber, Christian, Lehmann, Thomas, Teupser, Daniel, and Habenicht, Livia
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LYMPHOID tissue , *IMMUNITY , *ATHEROSCLEROSIS prevention , *VASCULAR smooth muscle physiology , *MUSCLE cells , *TUMOR necrosis factor receptors , *PHYSIOLOGY - Abstract
Summary Tertiary lymphoid organs (TLOs) emerge during nonresolving peripheral inflammation, but their impact on disease progression remains unknown. We have found in aged Apoe −/− mice that artery TLOs (ATLOs) controlled highly territorialized aorta T cell responses. ATLOs promoted T cell recruitment, primed CD4 + T cells, generated CD4 + , CD8 + , T regulatory (Treg) effector and central memory cells, converted naive CD4 + T cells into induced Treg cells, and presented antigen by an unusual set of dendritic cells and B cells. Meanwhile, vascular smooth muscle cell lymphotoxin β receptors (VSMC-LTβRs) protected against atherosclerosis by maintaining structure, cellularity, and size of ATLOs though VSMC-LTβRs did not affect secondary lymphoid organs: Atherosclerosis was markedly exacerbated in Apoe −/− Ltbr −/− and to a similar extent in aged Apoe −/− Ltbr fl/fl Tagln-cre mice. These data support the conclusion that the immune system employs ATLOs to organize aorta T cell homeostasis during aging and that VSMC-LTβRs participate in atherosclerosis protection via ATLOs. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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