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Related Concept Videos

Blood Studies for Cardiovascular System III: Serum Lipid Profile01:25

Blood Studies for Cardiovascular System III: Serum Lipid Profile

Understanding serum lipids is crucial for maintaining cardiovascular health and preventing heart disease and stroke.
Serum lipids are fats and fatty substances in the blood and are crucial for various bodily functions, including energy storage, cellular structure, and hormone production. Serum lipids consist of cholesterol, triglycerides, and phospholipids.
Cholesterol is a soft, fat-like substance found in all body cells. It is crucial for producing hormones, vitamin D, and substances that aid...
Lipid-Lowering Drugs: Statins and Miscellaneous Agents01:20

Lipid-Lowering Drugs: Statins and Miscellaneous Agents

Hyperlipidemia, a medical condition often referred to as high cholesterol, is characterized by abnormally elevated levels of lipids in the bloodstream. When present in excess, these lipids, specifically cholesterol and triglycerides, can lead to serious health complications, often involving cardiovascular diseases. Illnesses like atherosclerosis, heart attacks, and pancreatitis have all been linked to untreated hyperlipidemia. This means controlling and regulating cholesterol and triglyceride...
Cholesterol: Significance and Regulation01:29

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...
Lipids: Dietary Sources and Requirements01:18

Lipids: Dietary Sources and Requirements

Lipids are an essential component of a balanced human diet. Triglycerides, which make up the majority of dietary lipids, are found in both saturated fats—commonly present in meat, dairy products, and certain tropical plants like coconut, and hydrogenated oils such as margarine and baking shortenings (trans fats)—and unsaturated fats, which are abundant in seeds, nuts, olive oil, and most vegetable oils. The main sources of cholesterol include egg yolks, various meats and organ meats, shellfish,...
Overview of Fatty Acid Metabolism01:28

Overview of Fatty Acid Metabolism

Lipids also are sources of energy that power cellular processes. Like carbohydrates, lipids are composed of carbon, hydrogen, and oxygen, but these atoms are arranged differently. Most lipids are nonpolar and hydrophobic. Major types include fats and oils, waxes, phospholipids, and steroids.
Fatty acids are catabolized in a process called beta-oxidation, which takes place in the matrix of the mitochondria and converts their fatty acid chains into two-carbon units of acetyl groups. The acetyl...
Lipid-derived Compounds in the Human Body01:31

Lipid-derived Compounds in the Human Body

Fats and lipids are crucial components in the human body. Some lipid-derived compounds, such as fat-soluble vitamins, eicosanoids, lipoproteins, and glycolipids, also play unique roles to support various  biological processes .
Fat-soluble Vitamins
Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin, delayed...

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Related Experiment Video

Updated: Jun 19, 2026

Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy
07:20

Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy

Published on: January 31, 2025

LIPOIDS AS THE GROWTH-INHIBITING FACTOR IN SERUM.

L E Baker1, A Carrel

  • 1Laboratories of The Rockefeller Institute for Medical Research.

The Journal of Experimental Medicine
|October 30, 2009
PubMed
Summary
This summary is machine-generated.

Serum lipoids significantly inhibit fibroblast growth in vitro. Removing these lipids reduces serum

Related Experiment Videos

Last Updated: Jun 19, 2026

Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy
07:20

Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy

Published on: January 31, 2025

Area of Science:

  • Biochemistry
  • Cell Biology
  • Toxicology

Background:

  • Serum's growth-inhibiting properties are a critical factor in biological research and therapeutic applications.
  • Understanding the specific components responsible for serum's inhibitory effects is essential for controlling cell culture conditions.

Purpose of the Study:

  • To investigate the role of lipoids in serum's inhibition of fibroblast growth in vitro.
  • To determine if extracted lipoids possess inherent growth-inhibiting or toxic properties.

Main Methods:

  • Fibroblast cell cultures were treated with original serum, delipidated serum, and Tyrode solution.
  • Lipoids were extracted from serum and various biological tissues (chicken brain, liver, egg, embryonic tissue).
  • The growth-inhibiting effects of these lipoids on fibroblasts in vitro were assessed.

Main Results:

  • Serum depleted of lipoids exhibited significantly reduced fibroblast growth inhibition compared to original serum.
  • Extracted serum lipoids demonstrated potent toxicity and greater inhibition of fibroblast growth than the original serum.
  • Lipoids from diverse sources, including chicken brain, liver, egg, and embryonic tissue, also showed inhibitory effects.

Conclusions:

  • Lipoids are the primary agents responsible for the growth-inhibiting action of serum on fibroblasts in vitro.
  • Extracted lipoids possess inherent toxicity and inhibitory capabilities, independent of other serum components.
  • The inhibitory effect of lipoids extends to various biological sources, suggesting a general biological role.