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. 1985 Aug;4(8):1957–1961. doi: 10.1002/j.1460-2075.1985.tb03877.x

EBV-inducing factor from platelets exhibits growth-promoting activity for NIH 3T3 cells.

G Bauer, U Birnbaum, P Höfler, C H Heldin
PMCID: PMC554447  PMID: 2998777

Abstract

An Epstein-Barr virus-indicating factor (EIF) has been purified from serum and platelets. We show here that highly purified preparations of platelet EIF exhibit growth-promoting activity for NIH 3T3 cells maintained in platelet-poor plasma. The Epstein-Barr virus (EBV)-inducing activity and growth-promoting activity co-elute upon gel chromatography under non-dissociating as well as dissociating conditions and co-migrate in SDS-gel electrophoresis, supporting the notion that both activities reside on the same molecule. Furthermore, both activities require a pH shock for full activity and act in the same concentration range. The growth-promoting activity of EIF can be differentiated from that of platelet-derived growth factor (PDGF), biologically (on the basis of differential response of cell lines to both factors), biochemically (on the basis of differences in isoelectric points and mol. wts. and the requirement of EIF to become activated by a pH shock) and by the lack of inhibition of EIF by antibody to PDGF.

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Selected References

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