DNA binding of sunitinib: Spectroscopic evidence via circular dichroism and nuclear magnetic resonance

Eszter Kiss, Arash Mirzahosseini, Ágnes Hubert, A. Ambrus, L. Őrfi, P. Horváth

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Sunitinib is a non-selective tyrosine kinase inhibitor, but in its chemical structure there can be discovered certain features, which suggest the ability to bind to DNA. These elements are the planar aromatic system and the tertiary amine function, which is protonated at the pH of the organism. In this study, the binding of the drug sunitinib to DNA was investigated using circular dichroism (CD), 1H NMR and UV spectroscopies, along with CD melting. For these studies DNA was isolated from calf thymus (CT), salmon fish sperm (SS), and chicken erythrocyte (CE), however for our purposes an artificially constructed and highly purified plasmid DNA (pUC18) preparation proved to be the most suitable. DNA binding of the drug was confirmed by shifts in the characteristic CD bands of the DNA, the appearance of an induced CD (ICD) signal in the upper absorption region of sunitinib (300 nm–500 nm), and the evidence from CD melting studies and the NMR. Based on the CD and NMR measurements, it can be assumed that sunitinib has a multiple-step binding mechanism.

Original languageEnglish
Pages (from-to)355-361
Number of pages7
JournalJournal of Pharmaceutical and Biomedical Analysis
Volume150
DOIs
Publication statusPublished - Feb 20 2018

Keywords

  • 1H NMR
  • Circular dichroism
  • DNA
  • Induced circular dichroism
  • Stauration transfer
  • Sunitinib

ASJC Scopus subject areas

  • Analytical Chemistry
  • Pharmaceutical Science
  • Drug Discovery
  • Spectroscopy
  • Clinical Biochemistry

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