alexa Requirement for RORgamma in thymocyte survival and lymphoid organ development.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): Sun Z, Unutmaz D, Zou YR, Sunshine MJ, Pierani A,

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Abstract Most developing thymocytes undergo apoptosis because they cannot interact productively with molecules encoded by the major histocompatibility complex. Here, we show that mice lacking the orphan nuclear hormone receptor RORgamma lose thymic expression of the anti-apoptotic factor Bcl-xL. RORgamma thus regulates the survival of CD4+8+ thymocytes and may control the temporal window during which thymocytes can undergo positive selection. RORgamma was also required for development of lymph nodes and Peyer's patches, but not splenic follicles. In its absence, there was loss of a population of CD3-CD4+CD45+ cells that normally express RORgamma and that are likely early progenitors of lymphoid organs. Hence, RORgamma has critical functions in T cell repertoire selection and lymphoid organogenesis.
This article was published in Science and referenced in Journal of Clinical & Cellular Immunology

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