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Original Research 


Dihydrofolate reductase (DHFR) inhibition and molecular modeling study of some 6-bromo- or 6,8-dibromo-quinazolin-4(3H)-ones

Abdelfattah A. Abdelkhalek, Heba A. Ewida, Shahenda M. El-Messery, Hossam S. A. Mahmoud, Ashraf F. Wasfy, Esraa A. M. Moharram, Hussein I. El-Subbagh.

Abstract
Objectives: The dihydrofolate reductase (DHFR) inhibitory activity of 6-bromo- and 6,8-dibromo-quinazolin-4(3H)-ones (725) 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 725 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.

Key words: Quinazolines, DHFR inhibition, antitumor screening, molecular modeling study


 
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Pubmed Style

Abdelfattah A. Abdelkhalek, Heba A. Ewida, Shahenda M. El-Messery, Hossam S. A. Mahmoud, Ashraf F. Wasfy, Esraa A. M. Moharram, Hussein I. El-Subbagh. Dihydrofolate reductase (DHFR) inhibition and molecular modeling study of some 6-bromo- or 6,8-dibromo-quinazolin-4(3H)-ones. A J Physiol Biochem Pharmacol. 2018; 7(1): 1-10. doi:10.5455/ajpbp.20180324024555


Web Style

Abdelfattah A. Abdelkhalek, Heba A. Ewida, Shahenda M. El-Messery, Hossam S. A. Mahmoud, Ashraf F. Wasfy, Esraa A. M. Moharram, Hussein I. El-Subbagh. Dihydrofolate reductase (DHFR) inhibition and molecular modeling study of some 6-bromo- or 6,8-dibromo-quinazolin-4(3H)-ones. http://www.ajpbp.com/?mno=294748 [Access: January 16, 2019]. doi:10.5455/ajpbp.20180324024555


AMA (American Medical Association) Style

Abdelfattah A. Abdelkhalek, Heba A. Ewida, Shahenda M. El-Messery, Hossam S. A. Mahmoud, Ashraf F. Wasfy, Esraa A. M. Moharram, Hussein I. El-Subbagh. Dihydrofolate reductase (DHFR) inhibition and molecular modeling study of some 6-bromo- or 6,8-dibromo-quinazolin-4(3H)-ones. A J Physiol Biochem Pharmacol. 2018; 7(1): 1-10. doi:10.5455/ajpbp.20180324024555



Vancouver/ICMJE Style

Abdelfattah A. Abdelkhalek, Heba A. Ewida, Shahenda M. El-Messery, Hossam S. A. Mahmoud, Ashraf F. Wasfy, Esraa A. M. Moharram, Hussein I. El-Subbagh. Dihydrofolate reductase (DHFR) inhibition and molecular modeling study of some 6-bromo- or 6,8-dibromo-quinazolin-4(3H)-ones. A J Physiol Biochem Pharmacol. (2018), [cited January 16, 2019]; 7(1): 1-10. doi:10.5455/ajpbp.20180324024555



Harvard Style

Abdelfattah A. Abdelkhalek, Heba A. Ewida, Shahenda M. El-Messery, Hossam S. A. Mahmoud, Ashraf F. Wasfy, Esraa A. M. Moharram, Hussein I. El-Subbagh (2018) Dihydrofolate reductase (DHFR) inhibition and molecular modeling study of some 6-bromo- or 6,8-dibromo-quinazolin-4(3H)-ones. A J Physiol Biochem Pharmacol, 7 (1), 1-10. doi:10.5455/ajpbp.20180324024555



Turabian Style

Abdelfattah A. Abdelkhalek, Heba A. Ewida, Shahenda M. El-Messery, Hossam S. A. Mahmoud, Ashraf F. Wasfy, Esraa A. M. Moharram, Hussein I. El-Subbagh. 2018. Dihydrofolate reductase (DHFR) inhibition and molecular modeling study of some 6-bromo- or 6,8-dibromo-quinazolin-4(3H)-ones. American Journal of Physiology, Biochemistry and Pharmacology, 7 (1), 1-10. doi:10.5455/ajpbp.20180324024555



Chicago Style

Abdelfattah A. Abdelkhalek, Heba A. Ewida, Shahenda M. El-Messery, Hossam S. A. Mahmoud, Ashraf F. Wasfy, Esraa A. M. Moharram, Hussein I. El-Subbagh. "Dihydrofolate reductase (DHFR) inhibition and molecular modeling study of some 6-bromo- or 6,8-dibromo-quinazolin-4(3H)-ones." American Journal of Physiology, Biochemistry and Pharmacology 7 (2018), 1-10. doi:10.5455/ajpbp.20180324024555



MLA (The Modern Language Association) Style

Abdelfattah A. Abdelkhalek, Heba A. Ewida, Shahenda M. El-Messery, Hossam S. A. Mahmoud, Ashraf F. Wasfy, Esraa A. M. Moharram, Hussein I. El-Subbagh. "Dihydrofolate reductase (DHFR) inhibition and molecular modeling study of some 6-bromo- or 6,8-dibromo-quinazolin-4(3H)-ones." American Journal of Physiology, Biochemistry and Pharmacology 7.1 (2018), 1-10. Print. doi:10.5455/ajpbp.20180324024555



APA (American Psychological Association) Style

Abdelfattah A. Abdelkhalek, Heba A. Ewida, Shahenda M. El-Messery, Hossam S. A. Mahmoud, Ashraf F. Wasfy, Esraa A. M. Moharram, Hussein I. El-Subbagh (2018) Dihydrofolate reductase (DHFR) inhibition and molecular modeling study of some 6-bromo- or 6,8-dibromo-quinazolin-4(3H)-ones. American Journal of Physiology, Biochemistry and Pharmacology, 7 (1), 1-10. doi:10.5455/ajpbp.20180324024555





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