TITLE:
Low Dose Irbesartan Has a Renoprotective Effect as High Dose Ramipril in Diabetic Rats Treated with Insulin
AUTHORS:
Abdulmonim A. Alqasim, Sami H. Hammadi, Ghazi A. Bamagous, Essam Eldin M. Noureldin, Hussam H. Madi
KEYWORDS:
Diabetic Nephropathy, Albuminurea, Ramipril, Irbesartan
JOURNAL NAME:
Open Journal of Endocrine and Metabolic Diseases,
Vol.5 No.11,
November
13,
2015
ABSTRACT: Objectives: The aim of
this study is to compare the efficacy of the anti-angiotensinic drug, ramipril
and irbesartan on the vascular protection of kidneys of streptozotocin
(STZ)-induced diabetic rats (DR). Methods: 110 male albino rats were divided
into 7 main groups. Group-1 (10 normal control rats; NC). Group-2 (10 rats) was
injected intra-peritoneally with STZ (Diabetic Rats; DR). Group-3 (10 DR) is
controlled by insulin. Groups 4 to 7 (20 DR), each is subdivided into two
subgroups that received either low or high dose of ramipril or irbesartan with
or without insulin. Two months post treatment, rat-tail blood was collected to
measure: Fasting blood sugar, HbA1c, total serum proteins, albumin and lipid
profiles. Urine was collected to measure albuminuria. Kidneys were isolated for
histopathological study. Results: Biochemically, both ramipril and irbesartan
(without insulin) lowered albumin concentration in urine samples especially at high
doses. Histopathologically, there is no beneficial response of both drugs
without insulin. Combination of insulin together with either drug has
beneficial effects biochemically and histopathologically at high doses. Low
dose irbesartan only has renoprotective effect in DR treated with insulin. The
other biochemical parameters showed negligible response to both drugs.
Conclusion: Low dose irbesartan and high doses of both drugs have
renoprotective effect in DR treated with insulin.