Abstract:
:Interleukin-6 (IL-6), leukemia inhibitory factor, oncostatin M, IL-11, and ciliary neurotrophic factor constitute the IL-6 family of cytokines and play important roles in hematopoiesis, immune response, and nervous system. The receptors for the IL-6 family of cytokines share gp130 through which signals are generated, although the cytoplasmic region of gp130 does not contain any catalytic domain. In this study we show that in addition to Jak family tyrosine kinase, the stimulation of gp130 by IL-6 plus soluble IL-6 receptor alpha induced the activation of Btk and Tec tyrosine kinases, whereas IL-3 and granulocyte colony-stimulating factor activated Tec but not Btk in a pro-B cell line. Furthermore, both Btk and Tec kinases were associated with gp130 without the ligand stimulation. Because Btk is a critical tyrosine kinase for B lymphopoiesis and Tec is considered to be involved in hematopoiesis, the results suggest the involvement of gp130-Btk-Tec signal pathway in early lymphohematopoiesis.
journal_name
Bloodjournal_title
Bloodauthors
Matsuda T,Takahashi-Tezuka M,Fukada T,Okuyama Y,Fujitani Y,Tsukada S,Mano H,Hirai H,Witte ON,Hirano Tsubject
Has Abstractpub_date
1995-02-01 00:00:00pages
627-33issue
3eissn
0006-4971issn
1528-0020journal_volume
85pub_type
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