Effects of valsartan and amlodipine on oxidative stress in type 2 diabetic patients with hypertension: a randomized, multicenter study.

Abstract

BACKGROUND/AIMS:

Oxidative stress plays an important role in the pathogenesis and progression of diabetic complications and antagonists of renin-angiotensin system and amlodipine have been reported previously to reduce oxidative stress. In this study, we compared the changes in oxidative stress markers after valsartan and amlodipine treatment in type 2 diabetic patients with hypertension and compared the changes in metabolic parameters.

METHODS:

Type 2 diabetic subjects with hypertension 30 to 80 years of age who were not taking antihypertensive drugs were randomized into either valsartan (n = 33) or amlodipine (n = 35) groups and treated for 24 weeks. We measured serum nitrotyrosine levels as an oxidative stress marker. Metabolic parameters including serum glucose, insulin, lipid profile, and urine albumin and creatinine were also measured.

RESULTS:

After 24 weeks of valsartan or amlodipine treatment, systolic and diastolic blood pressure decreased, with no significant difference between the groups. Both groups showed a decrease in serum nitrotyrosine (7.74 ± 7.30 nmol/L vs. 3.95 ± 4.07 nmol/L in the valsartan group and 8.37 ± 8.75 nmol/L vs. 2.68 ± 2.23 nmol/L in the amlodipine group) with no significant difference between the groups. Other parameters including glucose, lipid profile, albumin-to-creatinine ratio, and homeostasis model assessment of insulin resistance showed no significant differences before and after treatment in either group.

CONCLUSIONS:

Valsartan and amlodipine reduced the oxidative stress marker in type 2 diabetic patients with hypertension.

• Authors: Hae Jin Kim, Seung Jin Han, Dae Jung Kim, Hak Chul Jang, Soo Lim, Sung Hee Choi, Yong Hyun Kim, Dong Hyun Shin, Se Hwa Kim, Tae Ho Kim, Yu Bae Ahn, Seung Hyun Ko, Nan Hee Kim, Ji A Seo, Ha Young Kim, Kwan Woo Lee
• Journal: The Korean journal of internal medicine (Korean J Intern Med) Vol. 32 Issue 3 Pg. 497-504 (May 2017) ISSN: 2005-6648 [Electronic] Korea (South)
• PMID: 28490725 (Publication Type: Journal Article, Multicenter Study, Randomized Controlled Trial)

Chemical References

• Antihypertensive Agents
• Amlodipine
• Valsartan

Topics

• Amlodipine (pharmacology, therapeutic use)
• Antihypertensive Agents (pharmacology, therapeutic use)
• Diabetes Mellitus, Type 2 (complications)
• Female
• Humans
• Hypertension (complications, drug therapy)
• Male
• Middle Aged
• Oxidative Stress (drug effects)
• Valsartan (pharmacology, therapeutic use)