In vitro DNA binding studies of anticancer drug idarubicin using spectroscopic techniques

Ozluer C., Şatana Kara H. E.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY, vol.138, pp.36-42, 2014 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 138
  • Publication Date: 2014
  • Doi Number: 10.1016/j.jphotobiol.2014.05.015
  • Journal Name: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.36-42
  • Keywords: DNA, Idarubicin, Ethidium bromide, DNA binding, Spectrofluorometry, Spectrophotometry, LIQUID-CHROMATOGRAPHY, ETHIDIUM-BROMIDE, METHYLENE-BLUE, FLUORESCENCE, SERUM, ANTHRACYCLINES, EPIRUBICIN, PLASMA
  • Gazi University Affiliated: Yes

Abstract

The interaction between idarubicin and double stranded deoxyribonucleic acid (ds-DNA) was investigated by UV-VIS spectrophotometry, fluorescence and Raman spectroscopy techniques. The absorption spectra of idarubicin with ds-DNA showed a slight red shift and hypochromic effect. In the fluorescence experiments, emission peaks were decreased by adding ds-DNA. Using ethidium bromide (ETB) as a fluorescence probe, fluorescence quenching of the emission peak was observed in the ETB-DNA system when idarubicin was added. Moreover, similar results were obtained in Raman spectroscopy. Binding constants of idarubicin with ds-DNA were determined as 5.14 x 10(5) M-1 and 5.8 x 10(5) M-1 for UV-VIS spectrophotometry and fluorescence spectroscopy, respectively. The large binding constant indicated that idarubicin has a high affinity with ds-DNA. All the evidences indicated that the binding mode of idarubicin with DNA was an intercalative binding. Furthermore, quantitative determination of idarubicin in pharmaceutical formulation was done. (C) 2014 Elsevier B.V. All rights reserved.