Literature DB >> 10607706

A splice variant of human ephrin-A4 encodes a soluble molecule that is secreted by activated human B lymphocytes.

H C Aasheim1, E Munthe, S Funderud, E B Smeland, K Beiske, T Logtenberg.   

Abstract

Ephrin-A4 is a ligand for the erythropoietin-producing hepatocellular (Eph) receptor family of tyrosine kinases. We have identified a secreted form of ephrin-A4, denoted ephrin-A4 (s), which is encoded by an alternatively spliced mRNA and is produced by in vivo activated B cells in tonsils. Blood B cells secrete ephrin-A4 (s) upon stimulation via the B-cell antigen receptor. A subpopulation of tonsil cells in the crypts with a dendritic cell phenotype was shown to express EphA2, an Eph receptor tyrosine kinase that was found to be capable of binding an ephrin-A4 immunoglobulin chimeric protein. We conclude that ephrin-A4 (s) may play a role in the interaction between activated B lymphocytes and dendritic cells in human tonsils. (Blood. 2000;95:221-230)

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Year:  2000        PMID： 10607706

Source DB:  PubMed          Journal:  Blood        ISSN： 0006-4971            Impact factor:   22.113


  19 in total

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