Studies on the Interaction of Gatifloxacin with Bovine Serum Albumin in the Presence of Carbon Nanotubes by Fluorescence Spectroscopy
ZHA Jun1, HE Hua1, 4*, LIU Tie-bing2, LI Shan-shan1, JIAO Qing-cai3
1. Division of Analytical Chemistry, China Pharmaceutical University, Nanjing 210009, China 2. The Sino-Germany Institute of Agriculture Products Processing Industry, Zhejiang University of Science and Technology, Hangzhou 310023, China 3. State Key Laboratory of Pharmaceutical Biotechnology，Nanjing University，Nanjing 210093，China 4. Key Laboratory of Drug Quality Control and Pharmacovigilance of Ministry of Education(China Pharmaceutical University)，Nanjing 210009，China
Abstract：Fluorescence spectroscopy was used to investigate the influences of carbon nanotubes (CNTs) on the fluorescence of bovine serum albumin (BSA)，the influences of CNTs on that of gatifloxacin (GFLX) , and the influences of GFLX on that of BSA with or without coexisting CNTs under imitated physiological condition. The experimental results demonstrate that both gatifloxacin and carbon nanotubes could quench the intrinsic fluorescence of BSA, and the quenching mechanism is mainly static quenching. The fluorescence quenching action of GFLX on BSA was weakened in the presence of CNTs. The fluorescence quenching data were analyzed according to Stern-Volmer equation and double-reciprocal Lineweaver-Burk equation. It was shown that the quenching constant (KSV) and the binding constant (K) are decreased with the concentration of carbon nanotubes increasing. The effects of coexisting CNTs on GFLX-BSA interactions were discussed to offer a reference for the studies on the action mechanism of CNTs or GFLX with albumins in vivo.
查 隽1, 何 华1, 4*，刘铁兵2，李杉杉1，焦庆才3 . 荧光光谱法研究共存碳纳米管对牛血清白蛋白与加替沙星相互作用的影响[J]. 光谱学与光谱分析, 2011, 31(01): 149-153.
ZHA Jun1, HE Hua1, 4*, LIU Tie-bing2, LI Shan-shan1, JIAO Qing-cai3 . Studies on the Interaction of Gatifloxacin with Bovine Serum Albumin in the Presence of Carbon Nanotubes by Fluorescence Spectroscopy . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(01): 149-153.
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