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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Importance of FSH-releasing protein and inhibin in erythrodifferentiation.

Inhibin is a hypophysiotropic hormone which selectively suppresses the secretion of pituitary follicle-stimulating hormone. It has been isolated from gonadal fluids and characterized as a protein heterodimer consisting of an alpha subunit and one of two beta subunits (beta A or beta B). FSH-releasing protein ( FRP), also named activin, is a dimer consisting of two inhibin beta-chains. A factor from conditioned medium of a leukaemia cell line has been isolated which can induce mouse Friend cells to become benzidine-positive, and which shares a similar N-terminal sequence with porcine FRP. In this report, we find that FRP and inhibin modulate both the induction of haemoglobin accumulation in a human erythroleukaemic cell line, K562, and the proliferation of erythroid progenitor cells in human bone marrow culture. These two proteins could constitute a novel humoral regulatory control of erythropoiesis which would involve two types of related protein dimers with functionally opposite effects.[1]


  1. Importance of FSH-releasing protein and inhibin in erythrodifferentiation. Yu, J., Shao, L.E., Lemas, V., Yu, A.L., Vaughan, J., Rivier, J., Vale, W. Nature (1987) [Pubmed]
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