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The Lipid Droplet-Associated Hydrolase Is Associated With Obesity and Adipose Tissue Inflammation in Children
Claudia Vales-Villamarín1, Antje Berthold1, Martin Lacher2
1Center for Pediatric Research, University Hospital for Children and Adolescents, Medical Faculty, University of Leipzig, Leipzig, Germany.
Insights
Lipid droplet-associated hydrolase (LDAH) plays a role in childhood obesity and adipose tissue inflammation. Lower LDAH expression correlates with higher BMI SDS and increased macrophage infiltration in children.
Area of Science:
- Adipose tissue biology
- Obesity research
- Human genetics
Background:
- Lipid droplet-associated hydrolase (LDAH) is a protein found in adipose tissue with an unknown function.
- Understanding LDAH's role is crucial for addressing obesity, particularly in children.
Purpose of the Study:
- To investigate the function of LDAH in human adipose tissue.
- To determine the relevance of LDAH in the context of childhood obesity.
Main Methods:
- Analysis of LDAH variant rs13385191 and gene expression in subcutaneous adipose tissue from 296 children.
- Studying the association between LDAH and obesity/adipose tissue biology.
- Investigating LDAH's effect on adipogenesis in SGBS preadipocytes.
Main Results:
- Lower LDAH expression was linked to higher BMI SDS in children.
- Reduced LDAH expression correlated with increased macrophage infiltration in adipose tissue.
- High LDAH expression was associated with lower circulating TNFα levels.
Conclusions:
- LDAH appears to be involved in adipose tissue inflammation.
- LDAH may play a role in the development of obesity in children.
Objective:
The lipid droplet-associated hydrolase (LDAH) is a lipid droplet-associated protein with an uncharacterized role in human adipose tissue (AT) and obesity; we aimed to investigate its role in human AT and its relevance for childhood obesity.
Methods:
LDAH variant rs13385191 and gene expression were analyzed in a cross-sectional study of subcutaneous AT samples from 296 children (120 girls, 176 boys; ages 0-18; BMI SDS -2.7 to 4.3), and an association with obesity and AT biology was studied. An effect of LDAH on adipogenesis was investigated in SGBS preadipocytes.
Results:
Minor allele carriers of rs13385191 showed lower AT LDAH expression compared to non-carriers (p < 0.001) and a trend toward higher BMI SDS, which was, however, not statistically significant (p = 0.062). Consistently, study participants with lower LDAH expression showed higher BMI SDS (p = 0.005). A negative correlation was found between LDAH and macrophage infiltration into AT after controlling for age (R = -0.132; p = 0.039), and high LDAH expression was associated with lower circulating TNFα (p = 0.017). LDAH expression increased during SGBS adipocyte differentiation, while its knockdown did not alter differentiation. In line with results from AT, TNFα significantly reduced LDAH expression in SGBS cells (p = 0.009).
Conclusions:
LDAH seems to have a role in AT inflammation and the development of obesity in children.
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