Masouad Pezeshkian
1, Akbar Darbin
2, Mohammad Reza Rashidi
3, Amir Mansor Vatankhah
3, Zahra Golmohammadi
4, Abbas Afrasiabi
1, Mohammad Nouri
5*1 Department of Cardiac Surgery, Cardiovascular Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
2 Department of Biochemistry, Tabriz University of Medical Sciences, Tabriz, Iran.
3 Department of Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
4 Cardiovascular Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
5 Department of Clinical Biochemistry, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.
Abstract
PON1 (Paraoxonase – 1) is an esterase enzyme which is associated with high density
lipoprotein (HDL). The enzyme prevents the peroxidation of low density lipoprotein
(LDL). The susceptibility of LDL for oxidation is the proven risk factor for coronary
artery diseases. The aim of this study is to survey the effect of atherogenic diet with or
without enzyme inhibitors on the incidence and progression of atherosclerosis in rabbits.
Twenty four New Zealand white rabbits divided into three groups (control, under the
atherogenic diet, atherogenic diet and nandrolone decanoate - paraoxonase inhibitor
therapy) and were treated for two months. At the beginning and end of the treatment, 5
mL of blood was obtained to determine the levels of total antioxidant capacity (TAC),
HDL, mallon dialdehide (MDA) and PON1. After sixty days rabbits anesthetized under
standard conditions, and sampling carried out from heart arteries for pathological
examinations. Data were analyzed using statistical software SPSS/15 and one way
ANOVA and paired t-test statistical tests. The results showed that the plasma levels of
TAC, HDL, MDA and PON1 had significant changes in this study (P<0.05). The
pathological study showed that in the presence of PON1, the formation and progression of
atheroma is diminished. The results of this study showed that cholesterol-rich diet
decreased serum level of PON1 which in turn led to a reduction in formation and
progression of atheroma. It was shown that the enzyme inhibitor helps accelerating the
development of atheroma.