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Related Experiment Videos

[Structure and function of the scavenger receptor]

H Itakura1, A Matsumoto, H Asaoka

  • 1Department the 3rd Internal Medicine, University of Tokyo.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|April 1, 1993
PubMed
Summary

Macrophage scavenger receptors, crucial for immune defense and endotoxin elimination, play a role in atheromatous plaque progression. Their collagen-like domain is key for ligand binding.

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Area of Science:

  • Immunology
  • Molecular Biology
  • Genetics

Context:

  • Macrophage scavenger receptors (MSRs) are integral membrane proteins involved in cellular processes.
  • These receptors possess a multi-domain structure, including a collagen-like domain critical for ligand binding.
  • MSRs are expressed in macrophages across various tissues, including Kupffer cells and brain perivascular macrophages.

Purpose:

  • To elucidate the structural and functional characteristics of macrophage scavenger receptors.
  • To investigate the genetic basis and alternative splicing of scavenger receptor mRNA.
  • To explore the role of scavenger receptors in physiological and pathological conditions.

Summary:

  • Macrophage scavenger receptors feature six domains, with the collagen-like domain essential for ligand binding.

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  • The human scavenger receptor gene is located on chromosome 8, comprising 11 exons with alternative splicing producing two mRNA types.
  • Scavenger receptors are present in macrophages in organs like the liver, lungs, spleen, lymph nodes, and brain, potentially contributing to foam cell formation in atheromatous plaques and endotoxin detoxification.

    • Impact:

    • Understanding MSR structure and function provides insights into immune responses and disease pathogenesis.
    • The role of MSRs in endotoxin elimination highlights their importance in defending against pathogens.
    • Investigating MSRs in atheromatous plaques may reveal therapeutic targets for atherosclerosis.