Open AccessCharacterization of covalent Adriamycin-DNA adducts
Author(s) -
Steven M. Zeman,
Don R. Phillips,
Donald M. Crothers
Publication year - 1998
Publication title -
proceedings of the national academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.95.20.11561
Subject(s) - covalent bond , adduct , heteronuclear molecule , dna , chemistry , nuclear magnetic resonance spectroscopy , deoxyguanosine , dna damage , dna adduct , stereochemistry , context (archaeology) , combinatorial chemistry , biochemistry , biology , organic chemistry , paleontology
Adriamycin is a popular antineoplastic agent whose ability to form covalent adducts with DNA has been correlated to cellular apoptosis (programmed cell death) in tumor models. We have isolated and purified this adduct formed under oxido-reductive (Fenton) conditions in Tris buffer. We show by homo- and heteronuclear NMR spectroscopy that the covalent Adriamycin-DNA adduct is structurally equivalent to that resulting from direct reaction with formaldehyde. Covalent linkage of the drug to one of the DNA strands confers remarkable stability to the duplex, indicated by a 162-fold reduction in the rate of strand displacement compared with the complex with noncovalently bound drug. Glyceraldehyde also engenders covalent Adriamycin-DNA complexes, providing a possible relevant biological context for in vivo adduct formation.
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