Visceral Fat Area and Serum Adiponectin Level Predict the Development of Metabolic Syndrome in a Community-Based Asymptomatic Population

AbstractObjective. Pregnancy can cause diabetic conditions and gestational diabetes is the most common metabolic disorder of the era. Scientific evidence suggests that obesity increases the incidence and severity of gestational diabetes. Adipokines are proteins secreted from adipose tissue in response to extracellular stimuli and altered metabolism. These hormones are involved in regulating the energy balance, lipid metabolism, and insulin sensitivity. One of the types of adipokines is called adiponectin, which has anti-diabetic, anti-inflammatory, and anti-atherogenic effects. Accordingly, this study is aimed to investigate the correlation between the serum adiponectin level with the gestational diabetes and the postpartum metabolic syndrome.Methods. This case-control study was carried out on 37 pregnant women (in Sari, Iran) with gestational diabetes and 37 non-diabetic pregnant women who were matched regarding age and body mass index (BMI). Serum adiponectin and glucose levels were measured. Finally, six weeks after termination of pregnancy, women in both groups were evaluated for metabolic syndrome. All statistical analyses of this study were performed using IBM SPSS software version 21 and, in all cases, the two-way p value less than 0.05 was considered statistically significant.Results. The mean age of pregnant women was 28.46±4.11 years in the non-diabetic group and 30.03±4.71 in the diabetic group. There was no statistically significant difference found between the mean age (p=0.123) and BMI (p=0.727) in two groups. Serum adiponectin levels in the diabetic group (5.51±3.15 µg/ml) were significantly lower than in the non-diabetic group (8.35±4.54 µg/ml) (p=0.003). In the diabetic group, serum adiponectin level did not correlate with the maternal age, maternal BMI, and postpartum metabolic syndrome (p>0.005).Conclusions. The results of the present study indicate a correlation of low adiponectin concentrations with gestational diabetes, but this association with postpartum metabolic syndrome is uncertain. However, to elucidate the mechanism of adiponectin in predicting gestational diabetes and postpartum metabolic syndrome further studies are required.

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Insulin Resistance Associated with Plasma Xanthine Oxidoreductase Activity Independent of Visceral Adiposity and Adiponectin Level: MedCity21 Health Examination Registry

International Journal of Endocrinology ◽

10.1155/2019/1762161 ◽

2019 ◽

Vol 2019 ◽

pp. 1-9

Author(s):

Masafumi Kurajoh ◽

Shinya Fukumoto ◽

Takayo Murase ◽

Takashi Nakamura ◽

Takuma Ishihara ◽

...

Keyword(s):

Insulin Resistance ◽

Uric Acid ◽

Visceral Fat ◽

Acid Production ◽

Adiponectin Level ◽

Visceral Adiposity ◽

Serum Adiponectin ◽

Health Examination ◽

Xanthine Oxidoreductase ◽

Serum Adiponectin Level

Background. Higher levels of uric acid production have been reported in individuals with visceral fat obesity, and obesity is known to enhance xanthine oxidoreductase (XOR) activity, although the precise mechanism remains unclear. We investigated the associations of visceral fat area (VFA), serum adiponectin level, and insulin resistance with plasma XOR activity using our novel highly sensitive assay based on [13C2,15N2] xanthine and liquid chromatography/triple quadrupole mass spectrometry. Methods. This cross-sectional study included 193 subjects (92 males and 101 females) registered in the MedCity21 health examination registry. Plasma XOR activity, serum adiponectin level, and VFA obtained by computed tomography were measured, and insulin resistance was determined based on the homeostasis model assessment (HOMA-IR) index. Results. The mean values for VFA, log HOMA-IR, and log plasma XOR activity were 76.8 ± 45.8 cm2, 0.14 ± 0.30, and 1.50 ± 0.44 pmol/h/mL, respectively. Multiple regression analysis showed that HOMA-IR was significantly (p=0.020) associated with plasma XOR activity independent of other factors, including VFA and adiponectin level, as well as age, sex, alcohol drinking habit, smoking habit, alanine transaminase, HbA1c, and eGFR. The “sex∗HOMA−IR” interaction was not significant (p=0.89), indicating that sex difference does not have an effect on the relationship between HOMA-IR and plasma XOR activity. Conclusions. Our results indicate that insulin resistance is associated with plasma XOR activity and that relationship is independent of visceral adiposity and adiponectin level, suggesting that the development of insulin resistance resulting from increased visceral adiposity and/or reduced serum adiponectin contributes to increased uric acid production by stimulating XOR activity.

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