Inhibitory effects of short-term administration of DL-alpha-lipoic acid on oxidative vulnerability induced by Abeta amyloid fibrils (25-35) in mice

• Published in: Molecular and cellular biochemistry Vol. 311; no. 1-2; pp. 145 - 156
• Main Authors: Jesudason, E Philip, Masilamoni, J Gunasingh, Ashok, Ben S, Baben, B'joe, Arul, V, Jesudoss, K Samuel, Jebaraj, W Charles E, Dhandayuthapani, S, Vignesh, S, Jayakumar, R
• Format: Journal Article
• Language: English
• Published: Netherlands 01.04.2008
• Subjects: Adenosine Triphosphatases - metabolism; Amyloid beta-Peptides - chemistry; Amyloid beta-Peptides - metabolism; Animals; Antioxidants - metabolism; Astrocytes - cytology; Astrocytes - metabolism; Glial Fibrillary Acidic Protein - metabolism; Hepatocytes - cytology; Hepatocytes - metabolism; Humans; Male; Mice; Oxidative Stress; Peptide Fragments - chemistry; Peptide Fragments - metabolism; Reactive Oxygen Species - metabolism; Spleen - cytology; Thiobarbituric Acid Reactive Substances - metabolism; Thioctic Acid - chemistry; Thioctic Acid - pharmacology
• ISSN: 0300-8177
• DOI: 10.1007/s11010-008-9705-9

Abeta amyloid peptide is believed to induce oxidative stress leading to inflammation, which is postulated to play a significant role in the toxicity of Alzheimer's disease (AD). This study was designed to investigate the inhibitory effects of DL-alpha lipoic acid (LA), a potential free radical scavenger, on oxidative vulnerability induced by intraperitoneal injection of Abeta25-35 amyloid fibrils in mice. Mice were divided into three groups: control, Abeta amyloid toxicity induced (AT), and LA treated (ATL). Blood Plasma was separated, liver, spleen and brain were dissected and analysis of oxidants, antioxidants, ATPases, glial fibrillary acidic protein (GFAP) and nuclear factor kappa-B (NFkappaB) were carried out. Results show biochemical parameters such as reactive oxygen species (ROS) and lipid peroxidation (LPO) were significantly lowered (P < 0.05) and levels of antioxidants and ATPase (P < 0.05) were significantly increased (P < 0.05) in hepatocytes, splenocytes and astrocytes of the ATL group. Moreover, our histological results revealed a decreased GFAP immunoreactivity in the neocortical region and NFkappaB immunoreactivity in neocortex, liver and spleen. This study reiterates LA as a potent free radical scavenger to combat oxidative vulnerability in the treatment for Abeta amyloid toxicity.