Queiroz 2024 Ecotoxicol Environ Saf
| [[Has title::Queiroz MIC, Lazaro CM, Dos Santos LMB, Rentz T, Virgilio-da-Silva JV, Moraes-Vieira PMM, Cunha FAS, Santos JCC, Vercesi AE, Leite ACR, Oliveira HCF (2024) In vivo chronic exposure to inorganic mercury worsens hypercholesterolemia, oxidative stress and atherosclerosis in the LDL receptor knockout mice. Ecotoxicol Environ Saf 275:116254. https://doi.org/10.1016/j.ecoenv.2024.116254]] |
» [[Has info::PMID: 38547729 Open Access]]
Was written by::Queiroz MIC, Was written by::Lazaro CM, Was written by::Dos Santos LMB, Was written by::Rentz T, Was written by::Virgilio-da-Silva JV, Was written by::Moraes-Vieira PMM, Was written by::Cunha FAS, Was written by::Santos JCC, Was written by::Vercesi AE, Was written by::Leite ACR, Was written by::Oliveira HCF (Was published in year::2024) Was published in journal::Ecotoxicol Environ Saf
Abstract: [[has abstract::Heavy metal exposure leads to multiple system dysfunctions. The mechanisms are likely multifactorial and involve inflammation and oxidative stress. The aim of this study was to evaluate markers and risk factors for atherosclerosis in the LDL receptor knockout mouse model chronically exposed to inorganic mercury (Hg) in the drinking water. Results revealed that Hg exposed mice present increased plasma levels of cholesterol, without alterations in glucose. As a major source and target of oxidants, we evaluated mitochondrial function. We found that liver mitochondria from Hg treated mice show worse respiratory control, lower oxidative phosphorylation efficiency and increased H2O2 release. In addition, Hg induced mitochondrial membrane permeability transition. Erythrocytes from Hg treated mice showed a 50% reduction in their ability to take up oxygen, lower levels of reduced glutathione (GSH) and of antioxidant enzymes (SOD, catalase and GPx). The Hg treatment disturbed immune system cells counting and function. While lymphocytes were reduced, monocytes, eosinophils and neutrophils were increased. Peritoneal macrophages from Hg treated mice showed increased phagocytic activity. Hg exposed mice tissues present metal impregnation and parenchymal architecture alterations. In agreement, increased systemic markers of liver and kidney dysfunction were observed. Plasma, liver and kidney oxidative damage indicators (MDA and carbonyl) were increased while GSH and thiol groups were diminished by Hg exposure. Importantly, atherosclerotic lesion size in the aorta root of Hg exposed mice were larger than in controls. In conclusion, in vivo chronic exposure to Hg worsens the hypercholesterolemia, impairs mitochondrial bioenergetics and redox function, alters immune cells profile and function, causes several tissues oxidative damage and accelerates atherosclerosis development.]]
• Bioblast editor: [[has editor::Plangger M]]
Labels: MiParea: MiP area::Respiration
