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[Significance of triglycerides for other metabolic parameters in the familial metabolic syndrome].

BACKGROUND
The relationship between the various degrees of glucose tolerance and metabolic parameters have already been examined in various studies. Whether and to what extent the triglycerides (TG) affect other metabolic parameters in the different degrees of glucose tolerance is not certain. We therefore studied the importance of the triglycerides within a defined glycemic state in patients with an elevated familial risk for metabolic diseases.


METHODS
We examined 866 patients (380 men, 486 women, mean age 44,4 years) in the "Familial Metabolic Syndrome Study" (FAMES). The patients were assigned to various degrees of glucose tolerance, according to the result of an oral glucose tolerance test. All degrees were divided into subgroups in respect of the triglyceride level (TG < 1,7 or TG >/= 1,7 mmol/l). In these subgroups we measured various metabolic parameters like fasting glucose, insulin resistance, insulin and proinsulin levels, HDL-cholesterol (HDL-C), LDL-cholesterol (LDL-C), uric acid, HbA (1c), and free fatty acids (FFA).


RESULTS
In patients with normal glucose tolerance the hypertriglyceridemia is already associated with other components of the metabolic syndrome like elevated HbA (1c), free fatty acids, proinsulin and insulin levels, worsened insulin sensitivity, elevated uric acid and LDL-C levels as well as a lowered HDL-C level. The patients with diabetes and hypertriglyceridemia also showed higher levels of FFA, proinsulin and insulin, a lower HDL-C level and a more prominent insulin resistance.


CONCLUSION
Hypertriglyceridemia is an indicator for insulin resistance and elevated levels of other components of the metabolic syndrome within the various degrees of glucose tolerance.