article · Toxicology and Industrial Health
Concurrent exposure to environmental toxins such as pesticides and heavy metals can intensify damage across multiple organ systems. An investigation in mice evaluated the combined effects of the pyrethroid insecticide deltamethrin and cadmium chloride over a two-week period. Mice receiving both substances showed significant elevations in the liver enzymes aspartate aminotransferase and alanine aminotransferase, with tissue examinations confirming physical liver injury. The combined exposure also prompted notable reductions in red blood cell counts, haemoglobin concentrations, haematocrit levels, and total leukocyte numbers. Furthermore, humoral-mediated immune responses were suppressed in the co-exposed animals. Deltamethrin and cadmium demonstrated an additive toxic profile, suggesting that these contaminants either act through separate cellular pathways or were present in quantities that did not saturate biological targets during simultaneous exposure.
People and wildlife are frequently exposed to mixtures of industrial and agricultural pollutants rather than single isolated chemicals. Demonstrating that an insecticide and a heavy metal act additively to damage liver tissue, reduce blood counts, and impair immune function highlights the compound risks of real-world chemical mixtures, underscoring the necessity of evaluating combined environmental hazards.
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Exposure to natural and man-made environmental toxins concurrently can pose a greater threat to multiple organs. In the present work, we investigated interactions between deltamethrin (DM) and cadmium (Cd), whose mechanisms of action in humans are poorly understood. Albino mice were randomly divided into four groups, each containing six mice: saline as control, DM-treated, cadmium chloride (CdCl<sub>2</sub>)-treated, and CdCl<sub>2</sub> plus DM treated. After 2 weeks of treatment biochemical and hematological effects, total leukocyte count (TLC), differential leukocyte count, humoral-mediated immune responses, and histopathological studies were conducted. Mice exposed to DM and Cd showed a significant increase in aspartate aminotransferase (AST) and alanine aminotransferase (ALT). Also, DM and Cd administration resulted in suppression of humoral immunity, erythrocyte count, hemoglobin, hematocrit, and TLC. Histopathological evidence revealed hepatic damage, supporting the AST and ALT findings. Cd and DM exhibited an additive type of toxicity. It could be concluded that these toxins either target different cellular pathways, or the individual amounts used in this study were not enough to saturate the toxicological target, thus producing additive effects.
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DOI: 10.1177/0748233716684710
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