Senescence markers in subcutaneous preadipocytes differ in childhood- versus adult-onset obesity before and after weight loss.
Obesity (Silver Spring)
; 31(6): 1610-1619, 2023 06.
Article
in En
| MEDLINE
| ID: mdl-37194560
ABSTRACT
OBJECTIVE:
The aim of this study was to determine the effect of age of obesity onset on senescence-related markers in abdominal (AB) and femoral (FEM) subcutaneous adipose tissue (SAT) before and after moderate (~10%) weight loss.METHODS:
AB and FEM SAT were collected from human females with childhood-onset obesity (CO) or adult-onset obesity (AO) before and after diet- and exercise-induced weight loss. Immunofluorescence analysis of γH2AX/RAD51 (DNA damage/repair markers) and p53/p21 (senescence markers) was conducted in cultured preadipocytes, and senescence-associated ß-galactosidase (SA-ß-gal) activity was measured in SAT.RESULTS:
CO had proportionately more AB and FEM preadipocytes with DNA damage (γH2AX+ ) and senescence markers (p53+ and/or p21+ ) than AO at baseline. The proportion of γH2AX+ FEM preadipocytes declined with weight loss in CO and was similar between groups after weight loss. The number of γH2AX foci in γH2AX+ preadipocytes decreased similarly between groups and regions with weight loss in parallel with an increase in RAD51. The proportion of p53+ and p21+ preadipocytes and SA-ß-gal+ cells in SAT did not change with weight loss, but the total p21 intensity in p53+ /p21+ FEM preadipocytes declined in AO.CONCLUSIONS:
These results provide preliminary evidence that females with CO have an accelerated preadipocyte aging state that improves with weight loss in terms of DNA damage but not senescence.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Tumor Suppressor Protein p53
/
Cellular Senescence
Limits:
Adult
/
Female
/
Humans
Language:
En
Journal:
Obesity (Silver Spring)
Journal subject:
CIENCIAS DA NUTRICAO
/
FISIOLOGIA
/
METABOLISMO
Year:
2023
Document type:
Article
Affiliation country: