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open access eISSN 2093-3673

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Original Article

Anat Cell Biol 2019; 52(2): 176-182

Published online June 1, 2019

https://doi.org/10.5115/acb.2019.52.2.176

Copyright © Korean Association of ANATOMISTS.

The effect of alpha-lipoic acid on expression of VCAM-1 in type 2 diabetic rat

Ismawati, 1Mukhyarjon, 2Enikarmila Asni, 1 and Ilhami Romus3

1Department of Biochemistry, Faculty of Medicine, Riau University, Pekanbaru, Indonesia.
2Department of Internal Medicine, Faculty of Medicine, Riau University, Pekanbaru, Indonesia.
3Department of Pathology Anatomy, Faculty of Medicine, Riau University, Pekanbaru, Indonesia.

Correspondence to: Ismawati. Department of Biochemistry, Faculty of Medicine, Riau University, Jl. Diponegoro No. 1, Pekanbaru 28133, Indonesia. Tel: +62-852-17065890, Fax: +62-761-839265, Email: ismawati75@yahoo.com

Received: July 29, 2018; Revised: January 1, 2019; Accepted: February 22, 2019

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Macrovascular diabetes complications are generally caused by a process called atherosclerosis. Evidences suggest that to initiate atherosclerosis, oxidated low-density lipoprotein (oxLDL) has to promote the expression of adhesion molecule. Several studies have evidenced the relevance of oxidative stress and atherosclerosis. However, the protective effect of alpha-lipoic acid (ALA) at atherosclerosis still needs to be explored. This study is aimed at investigating the concentration of plasma oxLDL and the expression of adhesion molecule of type 2 diabetes mellitus (DM) using rat model. Eighteen male rats were segregated into three groups labeled as control group, DM group and DM+ALA group. Type 2 diabetes was induced by intraperitoneal injection of streptozotocin (50 mg/kg) followed by nicotinamide (110 mg/kg). ALA was administered at a dose of 60 mg/kg body weight/day throughout the feeding period of 3 weeks. Plasma oxLDL concentration was measured by enzyme-linked immunosorbent assays and expression of vascular cell adhesion molecule-1 (VCAM-1) was measured by immunohistochemistry. Expression of abdominal aortic adhesion molecule was assessed by calculation with Adobe Photoshop CS3. Analysis of variance test was used to compare the concentration of plasma oxLDL and expression of adhesion molecule. A P-value of 0.05 was considered statistically significant. Plasma oxLDL was lower in diabetic rat+ALA compared with the diabetic rat. Percentage of area VCAM-1 in DM+ALA group was lower than DM group. There were no significant differences between groups in intensity of VCAM-1. In conclusion, ALA showed protective effects against early atherosclerosis in diabetic rats.

Keywords: Atherosclerosis, Vascular cell adhesion molecule-1, Diabetes mellitus

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