alexa Circulating vaspin is unrelated to insulin sensitivity in a cohort of nondiabetic humans.
Microbiology

Microbiology

Journal of Microbial & Biochemical Technology

Author(s): von Loeffelholz C, Mhlig M, Arafat AM, Isken F, Spranger J,

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Abstract OBJECTIVE: To study the association of vaspin with glucose metabolism. DESIGN: Cross-sectional and intervention study. SUBJECTS AND METHODS: The association of serum vaspin with metabolic and anthropometric characteristics was investigated in 108 volunteers. Euglycemic-hyperinsulinemic clamps (EHC) were performed in 83 of the participants. Changes of circulating vaspin levels were additionally studied in a crossover study using 300 min EHC with lipid versus saline infusion (n=10). RESULTS: Neither glucose tolerance status nor insulin sensitivity, both as measured using EHCs and using homeostasis model assessment for insulin resistance (HOMA-IR), was significantly associated with serum vaspin in the cross-sectional study. Furthermore, there was no effect of short-term lipid-induced insulin resistance due to a 300 min intravenous lipid challenge on circulating vaspin. However, circulating vaspin levels were significantly elevated in women using oral contraceptives (OC), both compared to women without OC intake (1.17+/-0.26 vs 0.52+/-0.09 ng/ml, P=0.02) and males (1.17+/-0.26 vs 0.29+/-0.04 ng/ml, P=0.01). After exclusion of OC using females and stratification according to body mass index (BMI), a significant sexual dimorphism in subjects with a BMI <25 kg/m(2) was observed (males 0.21+/-0.04 ng/ml versus females 0.70+/-0.16 ng/ml, P=0.009). CONCLUSION: Our results support the existence of a sexual dimorphism regarding circulating vaspin. The lack of an association of serum vaspin with HOMA-IR and M value indicates, however, no major role for vaspin concerning insulin sensitivity in nondiabetic humans. This article was published in Eur J Endocrinol and referenced in Journal of Microbial & Biochemical Technology

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