DNA damage induced by the anthracycline cosmomycin D in DNA repair-deficient cells

Cancer Chemotherapy and Pharmacology
Helotonio CarvalhoCarlos F M Menck

Abstract

Anthracyclines have been widely used as antitumor agents, playing a crucial role in the successful treatment of many types of cancer, despite some side effects related to cardiotoxicity. New anthracyclines have been designed and tested, but the first ones discovered, doxorubicin and daunorubicin, continue to be the drugs of choice. Despite their extensive use in chemotherapy, little is known about the DNA repair mechanisms involved in the removal of lesions caused by anthracyclines. The anthracycline cosmomycin D is the main product isolated from Streptomyces olindensis, characterized by a peculiar pattern of glycosylation with two trisaccharide rings attached to the A ring of the tetrahydrotetracene. We assessed the induction of apoptosis (Sub-G1) by cosmomycin D in nucleotide excision repair-deficient fibroblasts (XP-A and XP-C) as well as the levels of DNA damage (alkaline comet assay). Treatment of XP-A and XP-C cells with cosmomycin D resulted in apoptosis in a time-dependent manner, with highest apoptosis levels observed 96 h after treatment. The effects of cosmomycin D were equivalent to those obtained with doxorubicin. The broad caspase inhibitor Z-VAD-FMK strongly inhibited apoptosis in these cells, and DNA damage indu...Continue Reading

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Citations

Oct 18, 2011·Cancer Letters·Maria Carolina S MoraesCarlos F M Menck
May 29, 2016·Mutation Research. Reviews in Mutation Research·Jaqueline C RochaJenifer Saffi
May 3, 2016·DNA Repair·Jaqueline Cesar RochaJenifer Saffi
Dec 20, 2020·Cancer Genetics·Larissa Costa de AlmeidaLeticia Veras Costa-Lotufo

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