Cited by 109Cholesterol and Lipid MetabolismSteroid Chemistry and BiochemistryLipid Membrane Structure and Behavior

Cholesterol uptake in adrenal and gonadal tissues: the SR-BI and “selective” pathway connection

Azhar, Salman·2003·Frontiers in bioscience

Abstract

A constant supply of cholesterol is needed as a substrate for steroid hormone synthesis in steroidogenic tissues. Although there are three potential sources, which could contribute to the 'cholesterol pool', needed for steroidogenesis (i.e., de novo synthesis, hydrolysis of stored cholesteryl esters and exogenous lipoproteins), current evidence suggests that plasma lipoproteins are the major source of cholesterol for steroid production in adrenal gland, ovary and, under certain conditions, testicular Leydig cells. In many species, steroid producing cells and tissues obtain this lipoprotein-cholesterol by a unique pathway in which circulating lipoproteins bind to the surface of the steroidogenic cells and contribute their cholesteryl esters to the cells by a 'selective' process. This is a process in which cholesterol is selectively absorbed while the lipoprotein remains at the cell surface. The discovery of a specific receptor for this process (scavenger receptor class B, type I, known as SR-BI) has revolutionized our knowledge about the selective uptake pathway. The present review summarizes the functional importance of the selective pathway as a bulk cholesterol delivery system for steroidogenesis, and attempts to detail the expression, regulation and characteristics of SR-BI as it is deployed in steroidogenic systems as a means of achieving cholesterol balance.

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Crossref · 10.2741/1165

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Authors
Azhar, S.
Affiliations
VA Palo Alto Health Care System (US)
Corresponding author
Azhar, Salman
Venue
Frontiers in bioscience
Publisher
IMR Press
Published
2003
Volume
8
Issue
6
Pages
s998-1029
ISSN
  • 1093-4715 (ISSN-L)
  • 1093-9946
OpenAlex
W1974711948
Cited by
109
References
205
Citations by year
2026: 2 · 2025: 6 · 2024: 3 · 2023: 6 · 2022: 4 · 2021: 5 · 2020: 1 · 2019: 8 · 2018: 2 · 2017: 1 · 2016: 2 · 2015: 6 · 2014: 7 · 2013: 7 · 2012: 10
FWCI
4.47
Type
journal article
Language
en
Open access
closed
Locations
  • Frontiers in bioscience (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Heart, Lung, and Blood Institute (HL 33881)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-56339, P30DK056339)
Topics
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Steroid Chemistry and Biochemistry
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Lipid Membrane Structure and Behavior
Keywords
cholesterol absorption, scavenger receptor class B type I, steroidogenesis, adrenal gland, ovary, serum lipoproteins, cholesterol esters, steroidogenic tissues
MeSH terms
Adrenal Glands, Animals, Gonads, Humans, Cholesterol, HDL, Membrane Proteins, Organ Specificity, Receptors, Immunologic, Signal Transduction, Receptors, Lipoprotein, CD36 Antigens, Receptors, Scavenger, Scavenger Receptors, Class B

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