COMPARATIVE ANALYSIS OF THE EFFECTS OF PLATINUM COMPOUNDS ON THERMOSTABILITY OF DNA

Authors

  • I.E. Grigoryan Chair of Molecular Physics, YSU, Armenia
  • Ye.B. Dalyan Chair of Molecular Physics, YSU, Armenia
  • S.G. Haroutiunian Chair of Molecular Physics, YSU, Armenia

DOI:

https://doi.org/10.46991/PYSU:A/2011.45.3.052

Keywords:

DNA, binuclear compound of bivalent platinum, cis-DDP, renaturation, DNA melting, interstrand cross-link

Abstract

The thermal denaturation profiles of Calf Thymus DNA in the presence of binuclear compounds of bivalent platinum (cis-[{Pt(NH3)2Cl}2Pyr]Cl2) were studied by absorption spectrophotometry and differential adiabatic scanning microcalorimetry. A comparison with an active antitumor drug cis-diamminedichloroplatinum (cis-DDP) was made. Experimental data witness that small concentrations (r<0.3) of binuclear platinum compound stabilized the structure of Calf Thymus DNA stronger than cis-DDP. Both the complexes tend to refold the denaturated DNA. It is rather interesting that in case of 10-6 M concentration of binuclear platinum compound (r=0.03) the denaturated DNA is refolded by 77.62%, whereas under the same condition cis-DDP leads to 49.01% refolding of denaturated DNA. Such a high percent of renaturation was probably the result of interstrand cross-links formation.

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Published

2011-10-17

How to Cite

Grigoryan, I., Dalyan, Y., & Haroutiunian, S. (2011). COMPARATIVE ANALYSIS OF THE EFFECTS OF PLATINUM COMPOUNDS ON THERMOSTABILITY OF DNA. Proceedings of the YSU A: Physical and Mathematical Sciences, 45(3 (226), 52–57. https://doi.org/10.46991/PYSU:A/2011.45.3.052

Issue

Section

Physics