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Structure and function of the thymic microenvironment.

TitleStructure and function of the thymic microenvironment.
Publication TypeJournal Article
Year of Publication2011
AuthorsManley NR, Richie E, C Blackburn C, Condie BGene, Sage J
JournalFront Biosci (Landmark Ed)
Volume16
Pagination2461-77
Date Published2011
ISSN1093-4715
KeywordsAnimals, Cell Communication, Cell Cycle, Cell Differentiation, Cell Proliferation, Epithelial Cells, Epithelial-Mesenchymal Transition, Humans, Neural Crest, Stem Cells, T-Lymphocytes, Thymus Gland, Translational Medical Research
Abstract

Organs are more than the sum of their component parts--functional competence requires that these parts not only be present in the appropriate proportions, but also be arranged and function together in specific ways. The thymus is an excellent example of the connection between cellular organization and organ function. Unlike more familiar organs, such as lung or kidney, the thymus is not organized into easily identifiable structures such as tubes and ordered cell layers, but instead is a complex meshwork of microenvironments through which T cell progenitors migrate, receiving signals that instruct them to differentiate, proliferate, or die. Proper thymic organization is essential to the optimal production of a functional T cell repertoire. During aging, the thymus undergoes involution, largely due to degradation of the TEC microenvironmental compartment, which then fails to support optimal thymocyte development resulting in reduced output of naive T cells. This review will summarize the current state of understanding of the composition and organization of thymic microenvironments and the mechanisms that promote their proper development and function.

Alternate JournalFront Biosci (Landmark Ed)
PubMed ID21622189
Grant ListP01 AI076514 / AI / NIAID NIH HHS / United States
R01 AI082127 / AI / NIAID NIH HHS / United States
R01 HD35920 / HD / NICHD NIH HHS / United States