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Cholesterol: Significance and Regulation

Cholesterol: Significance and Regulation

Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
Considering cholesterol and...

Lipid Absorption

Lipid Absorption

Dietary triglycerides from chyme in the duodenum are mixed with bile salts produced by the liver to emulsify fats. As a result, large droplets are broken down into smaller ones, increasing the surface area for enzymatic action. Once emulsified, pancreatic lipases hydrolyze the triglycerides into free fatty acids and monoglycerides.
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Cholecystitis

Cholecystitis

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Lipids as Anchors

Lipids as Anchors

In the plasma membrane, the lipids forming the bilayer can also act as an anchor to tether proteins to the membrane. The three main types of lipid anchors found in eukaryotes are – prenyl groups, fatty acyl groups, and glycosylphosphatidylinositol or GPI groups. Prenyl and fatty acyl groups act as anchors on the cytosolic surface of the membrane, whereas GPI anchors proteins on the extracellular side.
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Lipids: Dietary Sources and Requirements

Lipids: Dietary Sources and Requirements

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Cholera

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Related Experiment Video

Updated: Jun 20, 2026

Cholesterol Efflux Assay

Cholesterol Efflux Assay

Published on: March 6, 2012

Cholesterol worships a new idol.

Ira G Schulman¹

¹Center for Molecular Design and Department of Pharmacology, University of Virginia Health System, Charlottesville, VA 22908, USA. igs4c@virginia.edu

Journal of Molecular Cell Biology

|September 29, 2009

Summary

Researchers identified Idol, a protein regulating low-density lipoprotein receptor stability, as a potential target for lowering cholesterol. Inhibiting Idol offers new therapeutic strategies for cardiovascular disease beyond statins.

Area of Science:

Biochemistry
Molecular Biology
Cardiovascular Research

Background:

Cardiovascular disease is a global health crisis requiring novel cholesterol-lowering therapies.
Statins are primary treatments, but complementary strategies are needed.

Purpose of the Study:

To identify new molecular targets for cholesterol regulation.
To investigate the role of the protein Idol in cholesterol metabolism.

Main Methods:

The study focused on the protein Idol and its role in regulating low-density lipoprotein receptor (LDLR) stability.
Investigated the mechanism by which Idol influences LDLR levels and cholesterol homeostasis.

Main Results:

Idol was identified as a key regulator of LDLR stability.

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Enrichment of Mammalian Tissues and Xenopus Oocytes with Cholesterol

Enrichment of Mammalian Tissues and Xenopus Oocytes with Cholesterol

Published on: March 25, 2020

High-throughput Nitrobenzoxadiazole-labeled Cholesterol Efflux Assay

High-throughput Nitrobenzoxadiazole-labeled Cholesterol Efflux Assay

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Last Updated: Jun 20, 2026

Cholesterol Efflux Assay

Cholesterol Efflux Assay

Published on: March 6, 2012

Enrichment of Mammalian Tissues and Xenopus Oocytes with Cholesterol

Enrichment of Mammalian Tissues and Xenopus Oocytes with Cholesterol

Published on: March 25, 2020

High-throughput Nitrobenzoxadiazole-labeled Cholesterol Efflux Assay

High-throughput Nitrobenzoxadiazole-labeled Cholesterol Efflux Assay

Published on: January 7, 2019

Inhibiting Idol activity was shown to impact cholesterol levels.

Conclusions:

Idol presents a novel therapeutic target for managing cholesterol levels.
Inhibition of Idol offers a potential new strategy for treating cardiovascular disease.