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Updated: Feb 11, 2026

Expression and Purification of Nuclease-Free Oxygen Scavenger Protocatechuate 3,4-Dioxygenase
Published on: November 8, 2019
Scavenger receptor B type 1: expression, molecular regulation, and cholesterol transport function
Wen-Jun Shen1, Shailendra Asthana2, Fredric B Kraemer1
1Geriatric Research, Education, and Clinical Research Center (GRECC), Veterans Affairs Palo Alto Health Care System, Palo Alto, CA 94304 and Division of Endocrinology, Gerontology, and Metabolism, Stanford University School of Medicine, Stanford, CA 94305.
Scavenger receptor B type 1 (SR-B1) facilitates selective uptake of high-density lipoprotein cholesterol esters, crucial for cellular functions. Understanding SR-B1 regulation and variants may lead to new therapies for various diseases.
Area of Science:
- Biochemistry
- Cell Biology
- Molecular Medicine
Background:
- Cholesterol is vital for cell membrane integrity and function.
- Cells obtain cholesterol via selective uptake of high-density lipoprotein cholesteryl esters (HDL-CE).
- Scavenger receptor B type 1 (SR-B1) is the primary cell surface receptor mediating HDL-CE uptake.
Purpose of the Study:
- To summarize the characteristics of the selective HDL-CE uptake pathway.
- To explore the mechanisms of SR-B1-mediated cholesterol transport.
- To review the regulation and impact of SR-B1 gene variants.
Main Methods:
- Review of existing literature on SR-B1 function and regulation.
- Analysis of SR-B1's role in cellular cholesterol homeostasis.
- Examination of SR-B1's involvement in various pathological conditions.
Main Results:
- SR-B1 is abundantly expressed in the liver and steroidogenic tissues, playing key roles in cholesterol metabolism.
- SR-B1 transcription is regulated by hormones, with additional posttranscriptional and posttranslational controls.
- Microvillar channels may facilitate selective HDL-CE uptake mediated by SR-B1.
Conclusions:
- SR-B1 mediates a unique selective cholesterol uptake pathway essential for cellular functions.
- Dysregulation or variants of SR-B1 are implicated in atherosclerosis, inflammation, and viral infections.
- Further understanding of SR-B1 may offer therapeutic strategies for diverse medical conditions.
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