Limitin : An interferon-like cytokine that preferentially influences B-lymphocyte precursors
2000
We have identified an interferon-like cytokine, limitin, on the basis of its ability to arrest the growth of or kill lympho–hematopoietic cells. Limitin strongly inhibited B lymphopoiesis in vitro and in vivo but had little influence on either myelopoiesis or erythropoiesis. Because limitin uses the interferon α/β receptors and induces interferon regulatory factor-1, it may represent a previously unknown type I interferon prototype. However, preferential B-lineage growth inhibition and activation of Janus kinase 2 in a myelomonocytic leukemia line have not been described for previously known interferons.
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