alexa Blimp-1 transcription factor is required for the differentiation of effector CD8(+) T cells and memory responses.


Journal of Clinical & Cellular Immunology

Author(s): Kallies A, Xin A, Belz GT, Nutt SL

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Abstract In response to viral infection, naive CD8(+) T cells proliferate and differentiate into cytotoxic and cytokine-producing effector cells. Here we showed that the transcription factor Blimp-1, a crucial regulator of plasma cell differentiation, was required for CD8(+) T cells to differentiate into functional killer T cells in response to influenza virus. Blimp-1 was not essential for the generation of memory T cells but was crucial for their efficient recall response upon reinfection. Antigen-specific Blimp-1-deficient CD8(+) T cells failed to appropriately regulate the transcriptional program essential for killer T cell responses and showed impaired migration to the site of infection. This study identifies Blimp-1 as a master regulator of the terminal differentiation of CD8(+) effector T cells and uncovers a conservation of the pathways that regulate the terminal differentiation of T and B cells. This article was published in Immunity and referenced in Journal of Clinical & Cellular Immunology

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