Future University In Egypt (FUE)

Staff Research

Paper Title :
Author : Hebatollah Atef Saad
CoAuthors : Abdelfattah A. Abdelkhalek, Shahenda M. El-Messery, Hossam S. A. Mahmoud, Ashraf F. Wasfy, Esraa A. M. Moharram.
Source : American Journal of Physiology, Biochemistry and Pharmacology
Date of Publication : 07/2018
Abstract : Objectives: The dihydrofolate reductase (DHFR) inhibitory activity of 6-bromo- and 6,8-dibromo-quinazolin-4(3H)-ones (7–25) were studied to define the structural features and requirements that enhance selectivity and specificity for the proper binding to the enzyme active site. Methods: Compounds 7–25 were tested for their in vitro DHFR inhibition. As an appli - cation of the use of DHFR inhibitors, in vitro antitumor activity using disease-oriented human cell lines assay was performed. Key findings: Compounds 19, 20, and 22 showed remarkable DHFR inhibitory activity, inhibitory concentration (IC 50 0.6, 0.2, and 0.1 μM, respectively). Compounds 12, 17, 18, 20, and 24 proved to be broad spectrum antitumor with median IC 50 values of 0.6, 0.6, 0.5, 0.6, and 0.7 μM, respectively. Molecular docking study results revealed that the active DHFR inhibitors 22 and 20 bind to DHFR with similar amino acid residues as methotrexate, especially Arg 28. Conclusions: The mono-bromo series proved to be more active than the di-bromo coun - terparts and the 3-(2-hydrazinyl-acetyl)- is more active than its 3-(acetohydrazide) isoster. The investigated compounds could be used as template model for further optimization.
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