作者: Shweta Agarwal , Deepak Kumar Jangir , Parul Singh , Ranjana Mehrotra
DOI: 10.1016/J.JPHOTOBIOL.2013.11.017
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摘要: Abstract Investigation of drug–DNA interaction is important for understanding the drug action at molecular level and designing specific DNA targeted drug. Lomustine (CCNU = 1-[2-chloroethyl]-3-cyclohexyl-1-nitroso-urea) an alkylating antineoplastic nitrosourea derivative, used to treat different types cancer. In present study, conformational structural effects lomustine on are investigated using spectroscopic approaches. Different drug/DNA molar ratios analyzed determine binding sites mode with DNA. Fourier transform infrared (FTIR) results suggest nitrogenous bases guanine cytosine along weak sugar-phosphate backbone Circular dichroism (CD) show perturbation in local conformation upon helix. These changes may act as recognition site enzymes that further causes alkylation Spectroscopic confirm formation intermediate stage occurs during transition B-conformation into A-conformation.