Scavenger receptors are present on rabbit aortic endothelial cells in vivo

Alan Daugherty, Joseph A. Cornicelli, Kathiyn Welch, Sandra M. Sendobry, Debra L. Rateri

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Endothelial cells metabolize modified LDL, but attempts to detect scavenger receptors in this cell type in vitro have been unsuccessful. To determine whether scavenger receptors are present on endothelial cells in vivo, species-specific reagents were developed to detect rabbit scavenger receptor protein. Antiserum against the rabbit scavenger receptor was generated with the use of synthetic peptides of two distinct regions: residues 3 to 21 in the cytoplasmic tail and residues 282 to 304 in the collagen-like region. Reactivity of antiserum against the synthetic peptides was confirmed with an enzyme-linked immunosorbent assay. Positive reactivity was also observed against fragments of scavenger receptor protein expressed in bacteria. Antiserum to both regions reacted with liver membrane proteins of sizes consistent with the scavenger receptor, as confirmed by Western blotting under reduced and nonreduced conditions. Immunocytochemical examination of rabbit aortic tissue by use of antiserum to both regions of scavenger receptor protein produced striking and identical patterns of staining of aortic endothelium. Immunostaining was abolished for both antisera by preadsorption with the specific peptide region used as immunogen. In contrast, incubation of scavenger receptor antiserum with a peptide of a region of the rabbit LDL receptor failed to influence immunoreactivity against endothelium. These data demonstrate the presence of scavenger receptors in rabbit endothelium in vivo, which may have fundamental implications for lipoprotein metabolism by the arterial wall.

Original languageEnglish
Pages (from-to)2369-2375
Number of pages7
JournalArteriosclerosis, Thrombosis, and Vascular Biology
Volume17
Issue number11
DOIs
StatePublished - 1997

Keywords

  • Endothelium
  • Immunocytochemistry
  • Rabbits
  • Scavenger receptors

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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