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  • Title: IL-7 receptor is present on human microvascular endothelial cells.
    Author: Duś D, Krawczenko A, Załecki P, Paprocka M, Wiedłocha A, Goupille C, Kieda C.
    Journal: Immunol Lett; 2003 Apr 03; 86(2):163-8. PubMed ID: 12644318.
    Abstract:
    Interleukin-7 (IL-7) is a pleiotropic, non-redundant cytokine crucial for development of B and T lymphocytes. The cellular response to IL-7 is triggered by binding of the cytokine to its receptor, IL-7R. Until now the expression of the receptor was evidenced only in lymphoid and myeloid cell lineages. The receptor consists of two chains: IL-7 specific alpha chain (CD127) and the common gamma(c) chain (CD132) which is a component of several other cytokine receptors: IL-2, IL-4, IL-9 and IL-15. The former observation that exogenous IL-7 is biologically active towards murine endothelial cell lines from secondary lymphoid organs was the starting point of our studies. This observation has prompted us to search for the presence of IL-7 receptor in human microvascular endothelial cells. We used in our studies a set of human endothelial cell lines established from various organs. Our results demonstrate the presence of IL-7R in human microvascular endothelial cells, mainly in the mesenteric but also in the peripheral and to a lesser extent, in the mucosa-associated lymph node endothelial cells. On the basis of the RT-PCR reaction, molecular weight estimated in Western blot and IL-7 binding activity the identified endothelial IL-7 receptor was identical to the lymphocyte-type IL7-R.
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