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Updated: Jun 5, 2026

Mechanism of Regulation of Adipocyte Numbers in Adult Organisms Through Differentiation and Apoptosis Homeostasis

Mechanism of Regulation of Adipocyte Numbers in Adult Organisms Through Differentiation and Apoptosis Homeostasis

Published on: June 3, 2016

Adipocyte hypoxia increases hepatocyte hepcidin expression.

Korry Joseph Hintze¹, Dallin Snow, Darren Nabor

¹Department of Nutrition, Dietetics, & Food Sciences, Utah State University, 8700 Old Main Hill, 750 North 1200 East, Logan, UT 89322-8700, USA. korry.hintze@usu.edu

Biological Trace Element Research

|December 25, 2010

Summary

Adipocyte hypoxia, linked to obesity, may increase hepcidin expression by signaling inflammation. This finding helps explain the connection between obesity and altered iron status.

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Isolation and Differentiation of Adipose-Derived Stem Cells from Porcine Subcutaneous Adipose Tissues

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Published on: March 31, 2016

Area of Science:

Endocrinology
Iron Metabolism
Cell Biology

Background:

Hepcidin regulates iron metabolism, with expression elevated by iron overload and inflammation.
Obesity is linked to chronic inflammation and impaired iron status.
Central obesity can induce adipocyte hypoxia, promoting inflammation.

Purpose of the Study:

To investigate if adipocyte hypoxia and inflammation influence hepcidin expression in hepatocytes.
To model the effect of adipocyte hypoxia on hepcidin expression using a co-culture system.

Main Methods:

A 3T3-L1 adipocyte/Huh7 hepatocyte co-culture model was used.
Adipocytes were exposed to normoxic (19% O2) or hypoxic (1% O2) conditions.
Hepcidin promoter activity and mRNA levels were measured in hepatocytes exposed to conditioned media.

Main Results:

Hypoxic adipocytes showed increased interleukin-6 (IL-6) and leptin expression.
Media from hypoxic or LPS-treated adipocytes significantly elevated hepcidin promoter activity and mRNA in hepatocytes.
Mutation of the hepcidin STAT3 binding site abolished promoter activation by hypoxic media.

Conclusions:

Adipocyte hypoxia, a characteristic of central obesity, may stimulate hepcidin expression.
This mechanism could contribute to the observed association between obesity and poor iron status.