Multi-spectroscopic method study the interaction of anti-inflammatory drug ketoprofen and calf thymus DNA and its analytical application

作者：Guo, Hongqin; Cai, Changqun^*; Gong, Hang; Chen, Xiaoming

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2011, 79(1): 92-96.

DOI：10.1016/j.saa.2011.02.012

• Anti-inflammatory drug
• Ketoprofen
• ctDNA
• Resonance light scattering (RLS)
• Groove binding

Interactions of the anti-inflammatory drug ketoprofen with calf thymus DNA (ctDNA) in aqueous solution have been studied by multi-spectroscopic method including resonance light scattering (RLS) technique, ultraviolet spectra (UV), (1)H NMR, etc. The characteristics of RLS spectra, the effective factors and optimum conditions of the reaction have been unequivocally investigated. Mechanism investigations have shown that ketoprofen can bind to ctDNA by groove binding and form large particles, which resulted in the enhancement of RLS intensity. In Critic acid-Na(2)HPO(4) buffer (pH = 6.5), ketoprofen has a maximum peak 451.5 nm and the RLS intensity is remarkably enhanced by trace amount of ctDNA due to the interaction between ketoprofen and ctDNA. The enhancement of RLS signal is directly proportional to the concentration of ctDNA in the range of 1.20 x 10(-6)-1.0 x 10(-5) mol/L, and its detection limit (3(7) is 1.33 x 10(-9) mol/L. The method is simple, rapid, practical and relatively free from interference generated by coexisting substance, and was applied to the determination of trace amounts of nucleic acid in synthetic samples with satisfactory results.

• 出版日期2011-6
• 单位湘潭大学