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. 1992 Sep;141(3):591–599.

Coexpression of type I and type II human macrophage scavenger receptors in macrophages of various organs and foam cells in atherosclerotic lesions.

M Naito 1, H Suzuki 1, T Mori 1, A Matsumoto 1, T Kodama 1, K Takahashi 1
PMCID: PMC1886699  PMID: 1519666

Abstract

Macrophage scavenger receptors are trimeric membrane glycoproteins implicated in the pathologic deposition of cholesterol in arterial walls during atherogenesis. Two types of cDNAs for functional human receptors have been cloned, but their physiologic roles remain obscure. To study the expression of these receptors, the authors generated antibodies against scavenger receptor type-specific synthetic peptide. Immunohistochemical examination using these antibodies and other anti-human receptor antibodies shows that type I and type II receptor proteins can be detected in foam cells in various stages of atherosclerosis, most evidently in fatty streaks. Co-expression of the two types of receptor protein was also detected in macrophages of various organs. Both types of the protein were detected on the surface and the membrane of endosomes in macrophages. These results indicate that both type I and type II scavenger receptors are expressed and functionally active in physiologic and pathologic conditions.

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