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Preadipocyte function and aging: links between age-related changes in cell dynamics and altered fat tissue function

J L Kirkland¹, D E Dobson

¹Department of Medicine, Boston University School of Medicine, Massachusetts, USA.

Journal of the American Geriatrics Society

|August 1, 1997

Summary

Aging impairs fat tissue function by altering progenitor cells. Declines in preadipocyte differentiation and fat cell lipogenesis contribute to reduced fat mass and function in older adults.

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Area of Science:

Gerontology
Cell Biology
Metabolism

Background:

Fat tissue undergoes significant changes with aging, affecting its cellularity and function.
Preadipocytes, the stem cells of adipose tissue, play a crucial role in maintaining fat tissue homeostasis.

Purpose of the Study:

To review recent findings on age-related changes in preadipocyte replication and differentiation.
To examine the links between these cellular alterations and age-related changes in fat tissue function.

Main Methods:

Literature review and analysis of recent studies on aging, preadipocytes, and adipose tissue.
Focus on changes in preadipocyte number, replicative potential, and differentiation capacity.

Main Results:

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Aging is associated with intrinsic changes in fat cells and preadipocytes.

Preadipocyte number, replication, and differentiation capacity decline with age.

These changes correlate with altered fat cell size, number, and function.

Conclusions:

Intrinsic and extrinsic factors contribute to age-related adipose tissue dysfunction.
Reduced preadipocyte differentiation and fat cell lipogenic capacity are key factors in age-related fat mass loss.
Altered gene expression and transcription factor regulation likely underlie these declines.