Abstract
Cadmium is a toxic environmental and industrial pollutant. Cadmium toxicity has been reported to produce biochemical and behavioral dysfunction that may cause adverse effects on several organs including the central nervous system. The present study was designed to investigate the neurotoxic effects of Cadmium Chloride (CdCl2) at three different doses by using different behavioral models. Lipid peroxidation (LPO), superoxide dismutase (SOD) and acetylcholinesterase (AChE) activities were also monitored following acute intraperitoneal injection of cadmium. Twenty four adult locally bred Albino Wistar rats were divided into control and 3 test groups (n = 6). Control rats were injected intraperitoneally with saline (0.9 % NaCl) and test groups were injected with CdCl2 (1 mg/kg, 2 mg/kg and 3 mg/kg) dissolved in physiological solution. Behavioral activities of rats were monitored after 1 h of cadmium injection. Locomotor activity and depression-like symptoms were measured by Open Field Test (OFT) and Forced Swimming Test (FST) respectively. Anxiety like behavior was monitored using Light–dark Transition (LDT) test and memory functions of rats were assessed by Morris Water Maze test (MWM). In the present study acute cadmium administration dose dependently increased anxiety in rats as compared to control rats. A significant increase in depression-like symptoms was also exhibited by cadmium treated rats. These behavioral dysfunctions may be attributed to the decreased superoxide dismutase (SOD) activity and simultaneously increased brain lipid peroxidation (LPO). Moreover learning and memory assessed by MWM showed dose dependent impairment in memory function in cadmium treated rats as compared to control rats. Acetylcholinesterase (AChE) activity was also decreased in brains of cadmium administered rats. It is suggested in this study that behavioral, biochemical and neurochemical dysfunctions caused by acute cadmium administration occur in a dose dependent manner.
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Abbreviations
- 5-HT:
-
5-hydroxytryptamine
- BBB:
-
Blood brain barrier
- CdCl2 :
-
Cadmium Chloride
- FST:
-
Forced swimming test
- LDT:
-
Light–dark transition
- MWM:
-
Morris water maze
- OFT:
-
Open field test
- AChE:
-
Acetylcholinesterase
- LPO:
-
Lipid peroxidation
- SOD:
-
Superoxide dismutase
- ATC:
-
Acetylthiocholine
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The authors are thankful to the University of Karachi, Pakistan for funding this project.
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Haider, S., Anis, L., Batool, Z. et al. Short term cadmium administration dose dependently elicits immediate biochemical, neurochemical and neurobehavioral dysfunction in male rats. Metab Brain Dis 30, 83–92 (2015). https://doi.org/10.1007/s11011-014-9578-4
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DOI: https://doi.org/10.1007/s11011-014-9578-4