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INDUSTRIAL HEALTH 1991,29,1-9
Cadmium-mediated Induction of Cellular Defence Mechanism:
a Novel Example for the Development of Adaptive
Response against a Toxicant
Sanjay GUPTA, Mohammad ATHAR, Jai R. BEHARI and
Ramesh C. SRIVASTAVA*
Industrial Toxicology Research Centre,
P.O. Box 80, Mahatma Gandhi Marg, Lucknow 226001, India
(Received August 27, 1990 and in revised form November 28, 1990)
Abstract: Early response to the exposure of cadmium includes the enhancement in lipid peroxidation with the concomitant impairment in antioxidative defence mechanism. This investigation deals with the delayed responce of cadmium induced stimulation of endogenous defence response against its oxidative damage. The administration of cadmium led to an increase in the hepatic enzymatic and nonenzymatic defence armory in a dose dependent manner 72 hrs post its administration. This includes respectively an increase in the activities of superoxide dismutase, glutathione peroxidase, glucose-6-phosphate dehydrogenase and in the levels of glutathione, metallothionein and zine. Cadmium administration also stimulated serum ceruloplasmin activity in a dose dependent manner. These changes are accompained by the concomitant decrease in the peroxidative damage to lipids. Our results suggest the development of a delayed adaptive/defence response as a result of exposure to cadmium.
Key words: Antioxidative defence-Oxidative damage-Superoxide dismutase-Glutathione peroxidase-Glutathione-Glucose-6-phosphate dehydrogenase-Metallothionein-Ceruloplasmin-Zine
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