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Lead-induced cardiac and hematological alterations in aging Wistar male rats: alleviating effects of nutrient metal mixture

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Abstract

Age related mitochondrial impairments are considered to be contributors of cardiovascular disease. This study was designed to examine whether early life exposure to lead (Pb) would lead to the Pb induced age related hematological and cardiac mitochondrial changes in rats, and to further examine the protective effect of nutrient metal mixture containing zinc, iron and calcium. Male albino rats were lactationally exposed to 0.2 % Pb-acetate or 0.2 % Pb-acetate together nutrient metal mixture (0.02 %) in drinking water of the mother from postnatal day 1 (PND1) to PND 21. The hemoglobin level, the activities of serum ceruloplasmin oxidase, cardiac mitochondrial enzymes catalase, manganese superoxide dismutase, copper zinc superoxide dismutase, glutathione peroxidase, succinate dehydrogenase, lipid peroxidation and Pb levels were analyzed at PND 45, 12 and 24 months age. The hematological parameters, and the cardiac TCA cycle and antioxidant enzyme markers and lipid peroxidation levels were significantly altered following Pb exposure in young rats (PND 45). These Pb induced changes persisted, though at much lower level in the aged rats. The Pb levels in blood and heart were also significantly higher in PND 45 and remained at detectable levels in older rats. The nutrient metal mixture containing iron, calcium and zinc significantly reversed these changes in all the chosen markers except lipid peroxidation in which the reversal effect was not significant. These data are supportive of age-related cardiac mitochondrial impairments and further provide evidence for the protective efficacy of nutrient metal mixture against Pb-toxicity.

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Acknowledgments

This study was supported by Council of Scientific and Industrial Research (CSIR), grant No. 37 (1349)/08/EMR-II.

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  1. Department of Zoology, Sri Venkateswara University, Tirupati, Andhra Pradesh, 517 502, India

    D. Chand Basha, S. Sadak Basha & G. Rajarami Reddy

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  1. D. Chand Basha
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  2. S. Sadak Basha
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Correspondence to G. Rajarami Reddy.

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Basha, D.C., Basha, S.S. & Reddy, G.R. Lead-induced cardiac and hematological alterations in aging Wistar male rats: alleviating effects of nutrient metal mixture. Biogerontology 13, 359–368 (2012). https://doi.org/10.1007/s10522-012-9380-9

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