Nucleic Acids Research, Vol 26, Issue 6 1473-1480, Copyright © 1998 by Oxford University Press
GB Onoa, G Cervantes, V Moreno and MJ Prieto
Modifications in the structure of a 260 bp DNA (hlyM) fragment from
Escherichia coli caused by interaction with Pd(II) and Pt(II) complexes
were studied. Cisplatin and transplatin [cis- and trans-PtCl2(NH3)2
respectively], Pt2Cl2(Spym)4 (Spym = 2-mercaptopyrimidine anion), Pd-
famotidine and Pt-famotidine were incubated with DNA for 24 h at 37 degrees
C and then observed with an atomic force microscope. Atomic force
microscopy (AFM) provides the opportunity for nanometer resolution in
research on the interaction between nucleic acids and metal complexes. The
complexes induced noticeable changes in DNA topography according to their
different characteristics and structure. In the case of cisplatin a
shortening in DNA strands was observed. Transplatin and Pt2Cl2(Spym)4
caused shortening and compaction, whilst an aggregation of two strands was
observed for the Pt-famotidine compound but not for the Pd-famotidine
compound or the metal-free famotidine.
ARTICLES
Study of the interaction of DNA with cisplatin and other Pd(II) and Pt(II) complexes by atomic force microscopy
Departament de Quimica Inorganica, Universitat de Barcelona, Diagonal 647, 08028-Barcelona, Spain.
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