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Flavonoid-DNA binding studies and thermodynamic parameters.

Naveed Kausar Janjua1, Amber Shaheen, Azra Yaqub

  • 1Department of Chemistry, Quaid-i-Azam University, Islamabad 45230, Pakistan. nkausarjanjua@yahoo.com

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
|July 1, 2011
PubMed
Summary

New flavonoid derivatives show strong binding with DNA, suggesting potential as drug candidates. These compounds interact with DNA through intercalation and groove binding, indicating promising therapeutic applications.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Pharmacology

Background:

  • Flavonoids are natural compounds with diverse biological activities.
  • Understanding their interaction with DNA is crucial for drug development.
  • Novel synthetic flavonoid derivatives offer opportunities for enhanced therapeutic properties.

Purpose of the Study:

  • To investigate the interaction between novel flavonoid derivatives (Fl) and chicken blood double-stranded DNA (ds.DNA).
  • To characterize the binding mode and affinity of these flavonoids to ds.DNA.
  • To evaluate the potential of these flavonoid derivatives as drug candidates.

Main Methods:

  • Spectrophotometric analysis (UV-Vis) in DMSO-H2O at varying temperatures.
  • Determination of binding constants and thermodynamic parameters.
  • Viscometric studies to assess changes in DNA structure upon flavonoid addition.

Main Results:

  • Spectral data indicated considerable binding between flavonoid derivatives and ds.DNA.
  • High binding constant values confirmed strong, spontaneous interaction.
  • Viscometry showed a linear increase in DNA viscosity with optimal flavonoid concentrations.
  • A mixed binding mode involving intercalation and groove binding was proposed.

Conclusions:

  • The investigated flavonoid derivatives are potent DNA binders.
  • Their interaction with ds.DNA is strong and spontaneous.
  • These compounds show promise as drug candidates, similar to natural flavonoids.