alexa Indicators Of Repeated Oral Exposure To Lead Combined With Cadmium In Non-lactating Ewes | 64315
ISSN: 2476-2067

Toxicology: Open Access
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8th World Congress on Toxicology and Pharmacology
April 13-15, 2017 Dubai, UAE

Sassia Sellaoui, Nadia Boufedda, Amine Boudaoud, Brigitte Enriquez and Smail Mehennaoui
University of Batna, Algeria
École nationale vétérinaire d'Alfort, France
Posters & Accepted Abstracts: Toxicol Open Access
DOI: 10.4172/2476-2067.C1.003
Abstract
Lead (Pb) and Cadmium (Cd) pollution co-exists and humans and animals may be co-exposed to both toxics. These heavy metals are known for their cumulative properties in environment. We have designed our experimental conditions in order to simulate a repeated low oral exposure and to highlight the toxic effects after lead and lead-Cadmium repeated oral exposure for nine weeks in ewes. An experiment was conducted using “Ouled Djellal” ewes during two periods: Before exposure, where ewes are considered as controls and during exposure 10 ewes were randomly divided in two groups of five; the lead group received lead nitrate at 2.5 mg Pb/kg/day and the lead-Cadmium group received lead nitrate at 2.5 mg Pb/kg/day + Cadmium chloride at 2 mg Cd/kg/day orally for 63 days. Both groups were tested for their blood lead levels and hematological and biochemical parameters before and after receiving the treatment. Before exposure, blood lead levels were below the detection limit of 4 μg/l. Blood levels of lead during 9 weeks of exposure varied from 135±57 μg/l to 356±147 μg/l for the lead group and from 192±75 μg/l to 445±294 μg/l for the co-exposed group. Mean blood lead levels of lead-Cadmium group were more elevated than the ones of the lead group. The transaminases (ALT, AST) and total proteins are high for the Pb-Cd group during the two last weeks of exposure. The ratio albumin/globulin is low. The rates of hematocrit and hemoglobin decreased for the Pb-Cd group to reach a value of 24% and 7.9±0.6 mg/100ml, respectively. The co-administration of Pb and Cd resulted in a significant reduction in zinc and copper plasma contents and the estimation of toxicokinetic parameters (AUC, Vs, Tmax, Cmax) revealed a greater systemic exposure. Concentrations of lead and Cadmium were determined in organs. Histopathologic lesions occurred in liver and kidney. ANOVA was used for statistical analysis.
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