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Tobwala, S.* ; Fan, W.* ; Stöger, T. ; Ercal, N.*

N-acetylcysteine amide, a thiol antioxidant, prevents bleomycin-induced toxicity in human alveolar basal epithelial cells (A549).

Free Radic. Res. 47, 740-749 (2013)
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Bleomycin (BLM), a glycopeptide antibiotic from Streptomyces verticillus, is an effective antineoplastic drug. However, its clinical use is restricted due to the wide range of associated toxicities, especially pulmonary toxicity. Oxidative stress has been implicated as an important factor in the development of BLM-induced pulmonary toxicity. Previous studies have indicated disruption of thiol-redox status in lungs (lung epithelial cells) upon BLM treatment. Therefore, this study focused on (1) investigating the oxidative effects of BLM on lung epithelial cells (A549) and (2) elucidating whether a well-known thiol antioxidant, N-acetylcysteine amide (NACA), provides any protection against BLM-induced toxicity. Oxidative stress parameters, such as glutathione (GSH), malondialdehyde (MDA), and antioxidant enzyme activities were altered upon BLM treatment. Loss of mitochondrial membrane potential (Delta Psi m), as assessed by fluorescence microscopy, indicated that cytotoxicity is possibly mediated through mitochondrial dysfunction. Pretreatment with NACA reversed the oxidative effects of BLM. NACA decreased the reactive oxygen species (ROS) and MDA levels and restored the intracellular GSH levels. Our data showed that BLM induced A549 cell death by a mechanism involving oxidative stress and mitochondrial dysfunction. NACA had a protective role against BLM-induced toxicity by inhibiting lipid peroxidation, scavenging ROS, and preserving intracellular GSH and Delta Psi m. NACA can potentially be developed into a promising adjunctive therapeutic option for patients undergoing chemotherapy with BLM.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Bleomycin ; N-acetylcysteine Amide ; Gsh-prodrug ; Oxidative Stress ; Reactive Oxygen Species; Induced Lung Fibrosis ; Idiopathic Pulmonary-fibrosis ; Acetyl-l-cysteine ; Blood-brain-barrier ; Oxidative Stress ; Superoxide-dismutase ; Lipid-peroxidation ; Glutathione Metabolism ; Hyperbaric-oxygen ; Ginkgo-biloba
ISSN (print) / ISBN 1071-5762
e-ISSN 1029-2470
Zeitschrift Free Radical Research
Quellenangaben Band: 47, Heft: 9, Seiten: 740-749 Artikelnummer: , Supplement: ,
Verlag Informa Healthcare
Begutachtungsstatus