1 Arquivos Brasileiros de Endocrinologia & Metabologia 2002 Vol: 46(3):. DOI: 10.1590/S0004-27302002000300008

Relação da homocisteinemia com a sensibilidade à insulina e com fatores de risco cardiovascular em um grupo indígena brasileiro

Relationship of Homocysteine, Insulin Sensitivity and Cardiovascular Risk Factors among the Brazilian Parkatêjê Indians. Hyperhomocysteinemia is an independent cardiovascular risk factor. There are controversies about a possible relation between homocysteine and insulin resistance/sensitivity. To test the relation between homocysteinemia and insulin sensitivity, serum total homocysteine concentrations (HPLC) were measured in samples from ninety Parkatêjê Indians (90% of the adult population, without admixture). Insulin sensitivity (%S) was estimated by HOMA. A diabetic woman was excluded from the analysis involving glycaemia, insulin, proinsulin, HbA1c and %S. Hyperhomocysteinemia and fasting hyperinsulinemia were found in 26.7% and 25.8% of Indians, respectively. Log-transformed (ln) homocysteine was positively correlated with systolic (r= 0.22) and diastolic (r= 0.21) blood pressure, triglycerides (r= 0.39) and uric acid (r= 0.40), after adjustment for age and sex, but not with insulin, proinsulin and ln %S. Ln homocysteine was similar among the quartiles of %S and between the subjects with and without fasting hyperinsulinemia. Insulin, proinsulin and ln %S were similar between the subjects with and without hyperhomocisteinemia. Correlations between variables related to cardiovascular risk were observed, but not between these variables and insulin or ln %S. Perhaps this finding could be a peculiar characteristic of this group. In conclusion, the variations in serum homocysteine levels were not related to insulin, proinsulin and %S among the Parkatêjê. (Arq Bras Endocrinol Metab 2002;46/3:260-268)

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