Format

Send to

Choose Destination
Biol Trace Elem Res. 2018 Aug;184(2):422-435. doi: 10.1007/s12011-017-1210-0. Epub 2017 Nov 30.

Acetyl-L-Carnitine Attenuates Arsenic-Induced Oxidative Stress and Hippocampal Mitochondrial Dysfunction.

Author information

1
Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, 1417614411, Tehran, Iran.
2
Toxicology and Poisoning Research Centre, Tehran University of Medical Sciences, Tehran, Iran.
3
Department of Biology, Faculty of Sciences, University of Zabol, Zabol, Iran.
4
Young Researchers and Elite Club, Zahedan Branch, Islamic Azad University, Zahedan, Iran.
5
Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
6
Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, 1417614411, Tehran, Iran. omid@tums.ac.ir.
7
Toxicology and Poisoning Research Centre, Tehran University of Medical Sciences, Tehran, Iran. omid@tums.ac.ir.

Abstract

Augmentation of mitochondrial oxidative stress through activating a series of deadly events has implicated as the main culprit of arsenic toxicity and therapeutic approaches based on improving mitochondrial function hold a great promise for attenuating the arsenic-induced toxicity. Acetyl-L-carnitine (ALC) through balancing the coenzyme A (CoA)/acyl-CoA ratio plays an important role in mitochondrial metabolism and thereby can help protect hippocampal neurons from oxidative damage. In the present study, we aimed to explore the effect of arsenic interactions on the mitochondrial function in the hippocampus of rats. Rats were randomly divided into five groups of control (distilled water), sodium arsenite (NaAsO2, 20 mg/kg), and co-treatment of NaAsO2 with various doses of ALC in three groups (100, 200, 300 mg/kg) and were treated orally for 21 consecutive days. Our results point out that arsenic exposure caused oxidative stress in rats' hippocampus, which led to the reactive oxygen species (ROS) generation, mitochondrial swelling, the collapse of the mitochondrial membrane potential, and release of cytochrome c. It also altered Bcl-2/Bax expression ratio and increased caspase-3 and caspase-9 activities. Furthermore, arsenic exposure via activation of NF-κB and microglia increased inflammation. ALC could concentration-dependently counteract the arsenic-induced oxidative stress, modulate the antioxidant defense capacity, and improve mitochondrial functions. In addition, ALC decreased the expression of both death-associated proteins and of inflammatory markers. These findings indicate that ALC improved the arsenic-induced hippocampal mitochondrial dysfunction which underlines the importance of ALC in providing a possible therapeutic strategy for the prevention of arsenic-induced neurodegeneration.

KEYWORDS:

Acetyl-L-carnitine; Arsenic; Hippocampus; Inflammation; Oxidative stress

PMID:
29189995
DOI:
10.1007/s12011-017-1210-0
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Springer
Loading ...
Support Center