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Subchronic Oral Cadmium Exposure Exerts both Stimulatory and Suppressive Effects on Pulmonary Inflammation/Immune Reactivity in Rats.

Overview of attention for article published in Biomedical and environmental sciences : BES, July 2019
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Title
Subchronic Oral Cadmium Exposure Exerts both Stimulatory and Suppressive Effects on Pulmonary Inflammation/Immune Reactivity in Rats.
Published in
Biomedical and environmental sciences : BES, July 2019
DOI 10.3967/bes2019.068
Pubmed ID
Authors

Kulas, Jelena, Ninkov, Marina, Tucovic, Dina, Popov Aleksandrov, Aleksandra, Ukropina, Mirela, Cakic Milosevic, Maja, Mutic, Jelena, Kataranovski, Milena, Mikrov, Ivana

Abstract

The aim of this study is to investigate the effects of oral cadmium (Cd) ingestion on the pulmonary immune response. Determination of Cd content in lungs and histopathological evaluation of the tissue was performed in rats following 30-day oral Cd administration (5 and 50 mg/L). Antioxidant enzyme defense (superoxide dismutase and catalase), cell infiltration, and production of tumor necrosis factor (TNF) and interferon (IFN)-γ, as well as the activity of myeloperoxidase (MPO), nitric oxide (NO), and various cytokines [interleukin (IL)-1β, IL-6, IL-10, and IL-17] were investigated. Cd caused tissue damage and cell infiltration in the lungs, and this damage was more pronounced at higher doses. Cd deposition resulted in lung inflammation characterized by a dose-dependent IL-1β increase in lung homogenates, increased TNF levels at both doses, and IL-6 stimulation at low doses with inhibition observed at higher doses. Cd exerted differential effects on lung leukocytes isolated by enzyme digestion, and these effects were characterized by a lack of change in the production of reactive oxygen and nitrogen species, an inhibition of IL-1β and TNF, and stimulation of MPO and IFN-γ. The higher capacity of Cd-exposed lung cells to respond to the opportunistic pathogen Staphylococcus epidermidis was demonstrated in vitro. The potential of ingested Cd to exert both proinflammatory and immunosuppressive effects on pulmonary tissue inflammation and immune reactivity highlights the complex immunomodulatory actions of this metal.

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Geographical breakdown

Country Count As %
Unknown 15 100%

Demographic breakdown

Readers by professional status Count As %
Librarian 2 13%
Student > Doctoral Student 2 13%
Student > Master 2 13%
Professor 1 7%
Student > Ph. D. Student 1 7%
Other 3 20%
Unknown 4 27%
Readers by discipline Count As %
Agricultural and Biological Sciences 2 13%
Immunology and Microbiology 2 13%
Environmental Science 1 7%
Business, Management and Accounting 1 7%
Pharmacology, Toxicology and Pharmaceutical Science 1 7%
Other 2 13%
Unknown 6 40%