Journal
JOURNAL OF CELLULAR BIOCHEMISTRY
Volume 98, Issue 2, Pages 429-439Publisher
WILEY
DOI: 10.1002/jcb.20803
Keywords
hNUDC; TPO; Mpl; megakaryocyte; platelet
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Human NUDC (hNUDC) has been previously described as a human homolog of a fungal nuclear migration protein. It is a multifunctional interactive protein that forms an association with the microtubule motor complex in a variety of cells. Our recent studies demonstrated that hNUDC could bind specifically to the thrombopoietin receptor (Mpl) and suggest a potential role for hNUDC in megakaryocytopoiesis and thrombopoiesis. The present Study is designed to define its biological activity. We demonstrate that the recombinant hNUDC significantly increases megakaryocyte maturation in serum-free liquid-cultured human CD34(+) cells and stimulates colony formation in serum-free semi-solid cultures. Flow cytometry analyses also confirm the stimulatory effect of hNUDC on megakaryocyte polyploidization and in vitro platelet production. In vivo experiments further demonstrate that the administration of hNUDC substantially enhance the number of circulating platelets in normal mice.
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