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Genetic dissection of serum vaspin highlights its causal role in lipid metabolism
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- Breitfeld, Jana (författare)
- Leipzig University
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- Horn, Katrin (författare)
- Leipzig University
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- Le Duc, Diana (författare)
- University Hospital Leipzig,Max Planck Institute for Evolutionary Anthropology
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- (creator_code:org_t)
- 2023
- 2023
- Engelska.
- Ingår i: Obesity. - 1930-7381. ; 31:11, s. 2862-2874
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- Objective: Vaspin (visceral adipose tissue derived serine protease inhibitor, SERPINA12) is associated with obesity-related metabolic traits, but its causative role is still elusive. The role of genetics in serum vaspin variability to establish its causal relationship with metabolically relevant traits was investigated. Methods: A meta-analysis of genome-wide association studies for serum vaspin from six independent cohorts (N = 7446) was conducted. Potential functional variants of vaspin were included in Mendelian randomization (MR) analyses to assess possible causal pathways between vaspin and homeostasis model assessment and lipid traits. To further validate the MR analyses, data from Genotype-Tissue Expression (GTEx) were analyzed, db/db mice were treated with vaspin, and serum lipids were measured. Results: A total of 468 genetic variants represented by five independent variants (rs7141073, rs1956709, rs4905216, rs61978267, rs73338689) within the vaspin locus were associated with serum vaspin (all p < 5×10−8, explained variance 16.8%). MR analyses revealed causal relationships between serum vaspin and triglycerides, low-density lipoprotein, and total cholesterol. Gene expression correlation analyses suggested that genes, highly correlated with vaspin expression in adipose tissue, are enriched in lipid metabolic processes. Finally, in vivo vaspin treatment reduced serum triglycerides in obese db/db mice. Conclusions: The data show that serum vaspin is strongly determined by genetic variants within vaspin, which further highlight vaspin's causal role in lipid metabolism.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Endokrinologi och diabetes (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Endocrinology and Diabetes (hsv//eng)
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- Breitfeld, Jana
- Horn, Katrin
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- Velluva, Akhil
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- Pietzner, Maik
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- Klöting, Nora
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- Heiker, John T.
- Tönjes, Anke
- Scholz, Markus
- Kovacs, Peter
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