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Published on: March 17, 2023
Estrogen receptors in human preadipocytes
J M Joyner1, L J Hutley, D P Cameron
1Department of Diabetes and Endocrinology, Princess Alexandra Hospital, Woolloongabba, Queensland, Australia. julie_joyner@health.qld.gov.au
Endocrine
|November 27, 2001
Summary
Human preadipocytes express estrogen receptor alpha (ERa), but not ERbeta. This suggests estrogen directly influences fat distribution and cardiovascular disease risk by acting on these cells via ERa.
Area of Science:
- Endocrinology
- Molecular Biology
- Cardiovascular Science
Background:
- Estrogen plays a role in adipose tissue distribution and cardiovascular disease (CVD) risk.
- Understanding the cellular mechanisms linking estrogen and fat deposition is crucial for CVD prevention.
Purpose of the Study:
- To investigate the presence and characteristics of estrogen receptors (ERs) in human preadipocytes (PAs).
- To determine if there are regional or gender-specific differences in ER expression in human PAs.
Main Methods:
- Reverse transcriptase-polymerase chain reaction (RT-PCR) to detect ERalpha and ERbeta gene expression.
- Western blotting to confirm ERalpha protein presence.
- Whole-cell binding assays using 17beta-estradiol (E2) to quantify ER binding characteristics.
Main Results:
- Human PAs express the ERalpha gene and ERalpha protein, but not ERbeta.
- Specific 17beta-estradiol binding to ERalpha was confirmed, with calculated dissociation constants and maximal binding capacities.
- No significant regional or gender differences in ERalpha complement were observed in subcutaneous or visceral adipose tissue.
Conclusions:
- Estrogen receptor alpha (ERa) is present in human preadipocytes, while ERbeta is not.
- This finding supports a direct mechanism by which estrogen influences adipose tissue deposition and potentially cardiovascular health through ERa in PAs.
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