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Human preadipocytes display a depot-specific susceptibility to apoptosis
C U Niesler1, K Siddle, J B Prins
1Department of Clinical Biochemistry, University of Cambridge, Addenbrooke's Hospital, UK.
Diabetes
|August 14, 1998
Summary
Human omental preadipocytes are more susceptible to apoptosis than subcutaneous ones. This depot-specific difference in preadipocyte apoptosis may influence adipose tissue distribution and metabolic health.
Area of Science:
- Adipose tissue biology
- Cellular and molecular biology
- Metabolic research
Background:
- Adipose tissue mass depends on adipocyte number and volume.
- Omental adiposity is linked to metabolic disorders like NIDDM.
- Site-specific differences in adipocyte function are known.
Purpose of the Study:
- To investigate site-specific differences in human preadipocyte apoptosis susceptibility.
- To compare apoptosis rates between omental and subcutaneous preadipocytes.
Main Methods:
- Paired omental and subcutaneous human preadipocytes were cultured.
- Apoptosis was induced via serum deprivation or TNF-alpha treatment.
- Acridine orange staining quantified apoptotic indices.
Main Results:
- Omental preadipocytes showed significantly higher apoptotic indices than subcutaneous ones.
- This increased susceptibility was observed under both apoptotic stimuli.
- Mean apoptotic indices were more than twofold higher in omental cells.
Conclusions:
- Human omental preadipocytes are intrinsically more susceptible to apoptosis than subcutaneous preadipocytes.
- Depot-specific differences in preadipocyte apoptosis may regulate adipose tissue distribution.
- These findings offer insights into the pathophysiology of metabolic disorders.