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  • Title: Angiotensin converting enzyme gene polymorphism and renal artery resistance in patients with insulin dependent diabetes mellitus.
    Author: Fukumoto S, Ishimura E, Hosoi M, Kawagishi T, Kawamura T, Isshiki G, Nishizawa Y, Morii H.
    Journal: Life Sci; 1996; 59(8):629-37. PubMed ID: 8761013.
    Abstract:
    The present study was carried out to elucidate whether renal hemodynamic changes are associated with angiotensin converting enzyme (ACE) gene polymorphism in patients with insulin dependent diabetes mellitus (IDDM). We studied 32 Japanese patients with IDDM (aged 15 +/- 3 years in mean +/- SD) without renal failure or retinopathy. Renal hemodynamics were examined by duplex Doppler sonography and arterial resistance index was calculated. ACE genotypes were determined by polymerase chain reaction amplification. Resistance index (RI) of arcuate arteries in IDDM patients with DD genotype was significantly elevated, being 0.64 +/- 0.04, 0.66 +/- 0.05, and 0.71 +/- 0.05 for II, ID and DD genotype groups, respectively (II vs. DD, p < 0.02). In patients with DD genotype with normoalbuminuria (n = 27), it was also significantly elevated in DD genotype patients (II vs. DD, p < 0.02). In addition, multiple regression analysis with a forward elimination procedure showed that only the ACE genotype was associated with RI of arcuate arteries (R2 = 0.24, p < 0.01) among the parameters of sex, age, IDDM duration, body mass index, HbA1c, plasma glucose levels, serum levels of total cholesterol and creatinine, urinary albumin excretion index, mean blood pressure and ACE genotype. The present study demonstrated that renal arterial resistance is elevated in IDDM patients with DD genotype. ACE gene polymorphism which could be linked to intrarenal circulatory disturbance may be associated with the initiation and progression of diabetic nephropathy.
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