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Related Concept Videos

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...
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...
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,...
Cholinesterases: Distribution and Function01:22

Cholinesterases: Distribution and Function

Cholinesterases are a group of serine hydrolase enzymes that play a crucial role in the breakdown of choline esters. The two primary types of cholinesterases are acetylcholinesterases (AChEs) and butyrylcholinesterase (BuChEs), which differ in their distribution, function, and substrate specificity. AChEs, also known as true cholinesterases, specifically hydrolyze acetylcholine, while BuChEs, often referred to as pseudocholinesterases, can hydrolyze various choline esters, including...
Aging01:26

Aging

Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
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Alzheimer Disease ll: Pathophysiology

Alzheimer disease involves structural changes in the brain that begin long before symptoms appear. The most distinctive features are extracellular neuritic plaques and intracellular neurofibrillary tangles.Neuritic plaques form in the cerebral cortex and around blood vessels. These plaques contain a dense core of beta-amyloid (Aβ)—a toxic protein fragment that clumps outside neurons. The core is surrounded by damaged neuronal extensions, as well as reactive astrocytes and microglia. Abnormal...

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Enrichment of Mammalian Tissues and Xenopus Oocytes with Cholesterol
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Published on: March 25, 2020

Brain cholesterol in normal and pathological aging.

Mauricio Martin1, Carlos G Dotti, Maria Dolores Ledesma

  • 1Department of Molecular and Developmental Genetics, VIB, 3000 Leuven, Belgium.

Biochimica Et Biophysica Acta
|April 3, 2010
PubMed
Summary

Maintaining proper lipid balance in brain cells is vital. This review explores how cholesterol changes in the aging brain and neurodegenerative diseases impact cognitive function and offers insights for future therapeutic strategies.

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Biochemistry

Background:

  • Lipid homeostasis at the plasma membrane is crucial for cellular function and survival.
  • The aging brain experiences significant challenges to lipid homeostasis, particularly concerning cholesterol levels.
  • Altered cholesterol levels are observed in both normal brain aging and neurodegenerative diseases like Alzheimer's disease.

Purpose of the Study:

  • To review current research on the causes and consequences of altered lipid and cholesterol levels in the aging brain.
  • To understand the role of these lipid changes in cognitive decline and neurodegeneration.
  • To identify potential therapeutic targets for mitigating age-related cognitive decline and neurodegenerative disorders.

Main Methods:

  • Literature review of existing studies on lipid metabolism, brain aging, and neurodegenerative diseases.
  • Synthesis of findings related to cholesterol's role in neuronal function and membrane integrity.
  • Analysis of research linking lipid dysregulation to cognitive impairment and disease pathogenesis.

Main Results:

  • Cholesterol, a key membrane component enriched in neurons, undergoes significant changes during brain aging.
  • These cholesterol alterations are implicated in the progression of neurodegenerative conditions.
  • Understanding these lipid dynamics is essential for developing effective interventions.

Conclusions:

  • Correcting lipid homeostasis is a critical target for addressing age-related cognitive decline.
  • Further research into cholesterol's role in neurodegeneration may yield novel therapeutic strategies.
  • This review consolidates knowledge to guide future investigations in brain aging and lipid metabolism.