Adiponectin complexes composition in Japanese-Brazilians regarding their glucose tolerance status

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Crispim, Felipe [UNIFESP]
Vendramini, Marcio F. [UNIFESP]
Moises, Regina S. [UNIFESP]
Japanese Brazilian Diabetes Study Group
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Background: Adiponectin circulates in different multimer complexes comprised of low molecular weight trimeric form (LMW), hexamer of middle molecular weight (MMW) and high molecular weight multimers (HMW). in Japanese-Brazilians, a population with high prevalence of glucose metabolism disturbances, we examined the associations of total adiponectin and its multimers with diabetes mellitus.Methods: Two study groups were examined: 26 patients with diabetes mellitus (DM, 14 women and 12 men, aged 55.3 +/- 8.6 years) and 27 age-matched control subjects with normal glucose tolerance (NGT, 12 women and 15 men, aged 54.0 +/- 9.2 years).Results: We found no significant differences in total [NGT: 6.90 ug/ml (4.38-13.43); DM: 5.38 ug/ml (3.76-8.56), p = 0.35], MMW [NGT: 2.34 ug/ml (1.38-3.25); DM: 1.80 ug/ml (1.18-2.84), p = 0.48] or LMW adiponectin [NGT: 2.07 ug/ml (1.45-3.48), DM: 2.93 ug/ml (1.78-3.99), p = 0.32] between groups. in contrast, HMW adiponectin levels were significantly lower in patients with DM [TGN: 2.39 ug/ml (1.20-4.75); DM: 1.04 ug/ml (0.42-1.60), p = 0.001]. A logistic regression analysis was done to identify independent associations with diabetes mellitus. the results showed that HOMA-IR and HMW adiponectin in women were independently associated with diabetes mellitus.Conclusion: the current investigation demonstrates that in Japanese-Brazilians HMW adiponectin is selectively reduced in individuals with type 2 diabetes, while no differences were found in MMW and LMW adiponectin isoforms.
Diabetology & Metabolic Syndrome. London: Biomed Central Ltd, v. 5, 6 p., 2013.