Hepatic expression, synthesis and secretion of a novel fibrinogen/angiopoietin-related protein that prevents endothelial-cell apoptosis - PubMed (original) (raw)

. 2000 Mar 15;346 Pt 3(Pt 3):603-10.

Affiliations

I Kim et al. Biochem J. 2000.

Abstract

Using degenerate PCR we isolated a cDNA encoding a novel 406- and 410-amino acid protein from human and mouse embryonic cDNAs and have designated it 'hepatic fibrinogen/angiopoietin-related protein' (HFARP). The N-terminal and C-terminal portions of HFARP contain the characteristic coiled-coil domains and fibrinogen-like domains that are conserved in angiopoietins. In human and mouse tissues, HFARP mRNA is specifically expressed in the liver. HFARP mRNA and protein are mainly present in the hepatocytes. HFARP has a highly hydrophobic region at the N-terminus that is typical of a secretory signal sequence and one consensus glycosylation site. Recombinant HFARP expressed in COS-7 cells is secreted and glycosylated. HFARP protein is present not only in the hepatocytes, but also in the circulating blood. Recombinant HFARP acts as an apoptosis survival factor for vascular endothelial cells, but does not bind to Tie1 or Tie2 (endothelial-cell tyrosine kinase receptors). These results suggest that HFARP may exert a protective function on endothelial cells through an endocrine action.

PubMed Disclaimer

Similar articles

Cited by

References

    1. J Biol Chem. 1999 Sep 10;274(37):26523-8 - PubMed
    1. Science. 1999 Jun 18;284(5422):1994-8 - PubMed
    1. Nucleic Acids Res. 1986 Jun 11;14(11):4683-90 - PubMed
    1. Nucleic Acids Res. 1989 Aug 11;17(15):6397 - PubMed
    1. Physiol Rev. 1990 Apr;70(2):427-51 - PubMed

Publication types

MeSH terms

Substances

LinkOut - more resources