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  • Title: Serum insulin level versus blood pressure: a cross-sectional, case-controlled study in non-obese, middle-aged Japanese subjects with normal glucose tolerance.
    Author: Baba T, Kodama T, Tomiyama T, Sohn DR, Ishizaki T.
    Journal: Diabet Med; 1994; 11(1):42-9. PubMed ID: 8181251.
    Abstract:
    To assess the relationship between blood pressure (BP) and serum insulin level in non-obese (body mass index (BMI) < or = 27 kg m-2), middle-aged (40-64 years of age) Japanese subjects with normal glucose tolerance, a three-phase study protocol was designed. First, the responses of plasma glucose and serum insulin to an oral glucose load were compared between 40 patients with untreated essential hypertension and 40 age-, sex- and BMI-matched normotensive control subjects. Second, the glucose and insulin responses to an i.v. glucose load were evaluated in 7 non-obese hypertensive, 7 non-obese normotensive and 7 obese hypertensive subjects. Third, BP and serum lipid profile were compared between 21 hyperinsulinaemic (serum insulin level (while fasting, after glucose loading, or both) > 2 SDs higher than the mean) and 21 age-, sex- and BMI-matched normoinsulinaemic subjects (serum insulin level within 1 SD of the mean). The glucose and insulin responses to the oral glucose load were comparable between the hypertensive and normotensive groups. Similarly, the glucose and insulin responses to the i.v. glucose load were comparable between the non-obese hypertensive and normotensive groups, whereas the mean AUCinsulin in the obese hypertensive group was significantly greater (p < 0.01) than that in either of the non-obese groups. The respective mean values for systolic and diastolic BPs did not differ between the hyperinsulinaemic and normoinsulinaemic groups. The mean serum triglyceride and HDL cholesterol concentrations were significantly higher (p < 0.01) and lower (p < 0.05), respectively, in the hyperinsuslinaemic than in the normoinsulinaemic group.(ABSTRACT TRUNCATED AT 250 WORDS)
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