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Updated: May 14, 2026
Evaluating the Effectiveness of Cancer Drug Sensitization In Vitro and In Vivo
Published on: February 6, 2015
Elucidation of the molecular interaction between cisplatin and flavonol(s) and their effect on DNA binding
Theodore J Zwang1, Kavisha Singh, Malkiat S Johal
1Department of Chemistry, Pomona College, 645 North College Avenue, Claremont, California 91711, United States.
Abstract:
Combination therapy of cisplatin with flavonols is a promising treatment for increasing the efficacy of cisplatin when combating cancer. However, little is known about the molecular interactions between cisplatin and flavonols. The data herein helps to elucidate this interaction. Spectrophotometric data in the UV-visible range indicates that hydroxyl groups on the B-ring of flavonols are essential for reactivity with cisplatin. The use of a quartz crystal microbalance with dissipation monitoring approach clearly supports the critical role played by B-ring hydroxyls in their interactions with a cisplatin-bound double-stranded DNA surface; an increase in the number of hydroxyl groups on the B-ring of flavonols parallels the increase in their reaction rates with cisplatin and correlates well with their reported effects on leukemia cell apoptosis efficacy. This study underscores the importance of B-ring hydroxyls in cisplatin's toxicity and may be used to better understand and improve combination therapies of flavonols with cisplatin.
Insights
The B-ring hydroxyls of flavonols are crucial for their reactivity with cisplatin, enhancing cancer treatment efficacy. This finding aids in developing improved combination therapies for leukemia.
Area of Science:
- Biochemistry
- Molecular Biology
- Pharmacology
Background:
- Combination therapy with cisplatin and flavonols shows promise for enhancing cancer treatment.
- The precise molecular interactions between cisplatin and flavonols remain largely uncharacterized.
Purpose of the Study:
- To elucidate the molecular interactions between cisplatin and flavonols.
- To identify key structural features of flavonols responsible for their interaction with cisplatin.
Main Methods:
- UV-visible spectrophotometry to analyze molecular interactions.
- Quartz crystal microbalance with dissipation monitoring (QCM-D) to study interactions on a DNA surface.
Main Results:
- Spectrophotometry revealed that hydroxyl groups on the B-ring of flavonols are essential for cisplatin reactivity.
- QCM-D data confirmed the critical role of B-ring hydroxyls in flavonol interaction with cisplatin-bound DNA.
- Increased B-ring hydroxyls on flavonols correlated with higher reaction rates and enhanced leukemia cell apoptosis.
Conclusions:
- B-ring hydroxyl groups are vital for the interaction between flavonols and cisplatin.
- Understanding these interactions can optimize combination therapies involving cisplatin and flavonols for cancer treatment.
