IL-7 promotes T cell proliferation through destabilization of p27Kip1

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IL-7 promotes T cell proliferation through destabilization of p27Kip1

Interleukin (IL)-7 is required for survival and homeostatic proliferation of T lymphocytes. The survival effect of IL-7 is primarily through regulation of Bcl-2 family members; however, the proliferative mechanism is unclear. It has not been determined whether the IL-7 receptor actually delivers a proliferative signal or whether, by promoting survival, proliferation results from signals other t...

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IL-27 promotes T cell–dependent colitis through multiple mechanisms

Interleukin-27 (IL-27) is a cytokine known to have both proinflammatory and immunoregulatory functions. The latter appear to dominate in vivo, where IL-27 suppresses TH17 responses and promotes the differentiation of Tr1 cells expressing interferon-γ and IL-10 and lacking forkhead box P3 (Foxp3). Accordingly, IL-27 receptor α (Il27ra)-deficient mice suffer from exacerbated immune pathology when...

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Human T cells constitutively express IL-15 that promotes ex vivo T cell homeostatic proliferation through autocrine/juxtacrine loops.

Homeostatic proliferation of T cells in vivo is responsible for the maintainance of the T cell pool, and IL-15 is a pivotal cytokine implicated in this process. Known cell sources providing physiologically active IL-15 are monocytes/macrophages, dendritic cells, and stromal cells. T lymphocyte expression of functionally active IL-15 and its possible role in T cell biology have not been investig...

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IL-21 restricts T follicular regulatory T cell proliferation through Bcl-6 mediated inhibition of responsiveness to IL-2

T follicular regulatory (Tfr) cells control the magnitude and specificity of the germinal centre reaction, but how regulation is contained to ensure generation of high-affinity antibody is unknown. Here we show that this balance is maintained by the reciprocal influence of interleukin (IL)-2 and IL-21. The number of IL-2-dependent FoxP3+ regulatory T cells is increased in the peripheral blood o...

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c-Met signaling promotes IL-6-induced myeloma cell proliferation

OBJECTIVES Hepatocyte growth factor (HGF) is a constituent of the myeloma microenvironment and is elevated in sera from myeloma patients compared to healthy individuals. Increased levels of serum HGF predict a poor prognosis. It has previously been shown by us and others HGF can act as a growth factor to myeloma cells in vitro although these effects have been moderate. We therefore wanted to in...

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ژورنال

عنوان ژورنال: Journal of Experimental Medicine

سال: 2006

ISSN: 1540-9538,0022-1007

DOI: 10.1084/jem.20051520