Pentathiepins: A Novel Class of Glutathione Peroxidase 1 Inhibitors that Induce Oxidative Stress, Loss of Mitochondrial Membrane Potential and Apoptosis in Human Cancer Cells
| العنوان: | Pentathiepins: A Novel Class of Glutathione Peroxidase 1 Inhibitors that Induce Oxidative Stress, Loss of Mitochondrial Membrane Potential and Apoptosis in Human Cancer Cells |
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| المؤلفون: | Martin Napierkowski, Lisa Wolff, Siva Sankar Murthy Bandaru, Claudia Urbainsky, Steven Behnisch‐Cornwell, Carola Schulzke, Christopher Horst Lillig, Muhammad Zubair, Patrick J. Bednarski |
| المصدر: | Chemmedchem |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | GPX1, Thioredoxin reductase, Glutathione reductase, DNA fragmentation, Apoptosis, medicine.disease_cause, 01 natural sciences, Biochemistry, chemistry.chemical_compound, Glutathione Peroxidase GPX1, Heterocyclic Compounds, Drug Discovery, Tumor Cells, Cultured, General Pharmacology, Toxicology and Pharmaceutics, Enzyme Inhibitors, chemistry.chemical_classification, Membrane Potential, Mitochondrial, biology, Full Paper, Molecular Structure, Chemistry, Glutathione peroxidase, Full Papers, Molecular Medicine, cytotoxicity, Cell Survival, Antineoplastic Agents, Sulfides, Superoxide dismutase, Structure-Activity Relationship, Very Important Paper, medicine, Humans, Cell Proliferation, Pharmacology, Reactive oxygen species, Glutathione Peroxidase, pentathiepin, Dose-Response Relationship, Drug, 010405 organic chemistry, Organic Chemistry, Glutathione, 0104 chemical sciences, 010404 medicinal & biomolecular chemistry, Oxidative Stress, biology.protein, cancer cells, Drug Screening Assays, Antitumor, Oxidative stress |
| الوصف: | A novel class of glutathione peroxidase 1 (GPx1) inhibitors, namely tri‐ and tetracyclic pentathiepins, has been identified that is approximately 15 times more potent than the most active known GPx1 inhibitor, mercaptosuccinic acid. Enzyme kinetic studies with bovine erythrocyte GPx1 indicate that pentathiepins reversibly inhibit oxidation of the substrate glutathione (GSH). Moreover, no inhibition of superoxide dismutase, catalase, thioredoxin reductase or glutathione reductase was observed at concentrations that effectively inhibit GPx1. As well as potent enzyme inhibitory activity, the pentathiepins show strong anticancer activity in various human cancer cell lines, with IC50 values in a low‐micromolar range. A representative tetracyclic pentathiepin causes the formation of reactive oxygen species in these cells, the fragmentation of nuclear DNA and induces apoptosis via the intrinsic pathway. Moreover, this pentathiepin leads to a rapid and strong loss of mitochondrial membrane potential in treated cancer cells. On the other hand, evidence for the induction of ferroptosis as a form of cell death was negative. These new findings show that pentathiepins possess interesting biological activities beyond those originally ascribed to these compounds. Anticancer drug development: Sulfur does it better! Pentathiepins inhibit glutathione peroxidase 1 (GPx1), cause a loss of mitochondrial membrane potential as well as oxidative stress in cancer cells, resulting in DNA strand breaks and inducing apoptosis. The loss of MMP appears to play a key role in their mechanism of action. Their qualities make pentathiepins interesting lead structures for anticancer drug development. |
| تدمد: | 1860-7187 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ccc766db533f3ed3c5850477407fbc9Test https://pubmed.ncbi.nlm.nih.gov/32311219Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....0ccc766db533f3ed3c5850477407fbc9 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 18607187 |
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