Transition Metal Chemistry

, Volume 42, Issue 4, pp 311–322

DNA interactions and anticancer screening of copper(II) complexes of N-(methylpyridin-2-yl)-amidino-O-methylurea

  • Romrawee Pratumwieng
  • Atittaya Meenongwa
  • Rosa F. Brissos
  • Patrick Gamez
  • Yanee Trongpanich
  • Unchulee Chaveerach
Article
  • 131 Downloads

Abstract

Cu(II) complexes of the tridentate ligand N-(methylpyridin-2-yl)-amidino-O-methylurea (L), namely [Cu(L)Cl2] and [Cu(L)ClO4]ClO4, have been investigated for interactions with DNA by spectroscopic methods and viscosity measurements. Both complexes bind to DNA through non-intercalative interactions. [Cu(L)Cl2] (Kb = 2.81 × 105 M−1) shows similar DNA-binding potential to [Cu(L)ClO4]ClO4 (Kb = 1.57 × 105 M−1). Investigation of the chemical nuclease properties toward plasmid pBR322 DNA by gel electrophoresis and atomic force microscopy (AFM) suggests that both complexes are able to cleave the supercoiled form (Form I) to the nicked (Form II) and linear forms (Form III) through an oxidative pathway. The possible reactive oxygen species have been investigated by the use of scavengers, indicating that hydroxyl radicals may be involved in the DNA cleavage mechanism. Both of these complexes show similar activities against selected human cancer cell lines.

Supplementary material

11243_2017_134_MOESM1_ESM.docx (363 kb)
Supplementary material 1 (DOCX 362 kb)

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Copyright information

© Springer International Publishing Switzerland 2017

Authors and Affiliations

  • Romrawee Pratumwieng
    • 1
  • Atittaya Meenongwa
    • 2
  • Rosa F. Brissos
    • 3
  • Patrick Gamez
    • 3
    • 4
  • Yanee Trongpanich
    • 5
  • Unchulee Chaveerach
    • 1
  1. 1.Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Materials Chemistry Research CenterKhon Kaen UniversityKhon KaenThailand
  2. 2.Chemistry Division, Department of Science, Faculty of Science and TechnologyRajamangala University of Technology KrungthepBangkokThailand
  3. 3.Departament de Química InorganicaUniversitat de BarcelonaBarcelonaSpain
  4. 4.Institució Catalana de Recerca I Estudis Avanҫats (ICREA)BarcelonaSpain
  5. 5.Department of Biochemistry, Faculty of ScienceKhon Kaen UniversityKhon KaenThailand

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