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Obesity01:24

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The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in...
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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.
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Updated: Jun 18, 2025

Mechanism of Regulation of Adipocyte Numbers in Adult Organisms Through Differentiation and Apoptosis Homeostasis
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How obesity affects adipocyte turnover.

Sang Mun Han1, Hahn Nahmgoong1, Kyung Min Yim1

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|August 2, 2024
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Summary
This summary is machine-generated.

Adipocyte turnover is vital for adipose tissue health, especially during metabolic stress. This review details how dead fat cells are cleared and replaced by new ones, a process crucial for maintaining tissue balance.

Keywords:
adipocyte turnoveradipose tissue plasticityadipose tissue remodelingiNKT cellobesity

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Area of Science:

  • Cellular and Molecular Biology
  • Physiology
  • Metabolic Health

Background:

  • Cellular turnover is essential for tissue homeostasis and integrity.
  • Adipocyte turnover constitutes 4% of human cellular mass turnover and is critical for adipose tissue function during metabolic stress.
  • Obesity disrupts the adipose tissue microenvironment, leading to adipocyte death.

Purpose of the Study:

  • To review the current understanding of adipocyte turnover.
  • To discuss the key players and regulatory mechanisms involved in adipocyte death, clearance, and regeneration.
  • To highlight the orchestrated nature of adipocyte turnover in maintaining adipose tissue homeostasis.

Main Methods:

  • This is a review article, synthesizing existing research.
  • Key players and regulatory mechanisms are identified through literature analysis.
  • The process of adipocyte turnover is examined in distinct stages: death, clearance, and regeneration.

Main Results:

  • Macrophages clear dead adipocytes, forming crown-like structures.
  • Adipose stem and progenitor cells generate new adipocytes within the adipogenic niche.
  • Adipocyte death, clearance, and adipogenesis are intricately coordinated processes.

Conclusions:

  • Adipocyte turnover is a sophisticatedly orchestrated process vital for adipose tissue homeostasis.
  • Understanding the mechanisms of adipocyte turnover is crucial for addressing metabolic dysfunction in obesity.
  • Further research into the key players and regulatory pathways can inform therapeutic strategies.