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Eissa IH, Metwaly AM, Belal A, Mehany ABM, Ayyad RR, El-Adl K, Mahdy HA, Taghour MS, El-Gamal KMA, El-Sawah ME, Elmetwally SA, Elhendawy MA, Radwan MM, ElSohly MA. Discovery and antiproliferative evaluation of new quinoxalines as potential DNA intercalators and topoisomerase II inhibitors. Arch Pharm (Weinheim) 2019; 352:e1900123. [PMID: 31463953 DOI: 10.1002/ardp.201900123] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 07/25/2019] [Accepted: 07/26/2019] [Indexed: 12/31/2022]
Abstract
In continuation of our previous work on the design and synthesis of topoisomerase II (Topo II) inhibitors and DNA intercalators, a new series of quinoxaline derivatives were designed and synthesized. The synthesized compounds were evaluated for their cytotoxic activities against a panel of three cancer cell lines (Hep G-2, Hep-2, and Caco-2). Compounds 18b, 19b, 23, 25b, and 26 showed strong potencies against all tested cell lines with IC50 values ranging from 0.26 ± 0.1 to 2.91 ± 0.1 µM, comparable with those of doxorubicin (IC50 values ranging from 0.65 ± 0.1 to 0.81 ± 0.1 µM). The most active compounds were further evaluated for their Topo II inhibitory activities and DNA intercalating affinities. Compounds 19b and 19c exhibited high activities against Topo II (IC50 = 0.97 ± 0.1 and 1.10 ± 0.1 µM, respectively) and bound the DNA at concentrations of 43.51 ± 2.0 and 49.11 ± 1.8 µM, respectively, whereas compound 28b exhibited a significant affinity to bind the DNA with an IC50 value of 37.06 ± 1.8 µM. Moreover, apoptosis and cell-cycle tests of the most promising compound 19b were carried out. It was found that 19b can significantly induce apoptosis in Hep G-2 cells. It has revealed cell-cycle arrest at the G2/M phase. Moreover, compound 19b downregulated the Bcl-2 levels, indicating its potential to enhance apoptosis. Furthermore, molecular docking studies were carried out against the DNA-Topo II complex to examine the binding patterns of the synthesized compounds.
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Affiliation(s)
- Ibrahim H Eissa
- Pharmaceutical Medicinal Chemistry Department, Faculty of Pharmacy (Boys), Al-Azhar University, Cairo, Egypt
| | - Ahmed M Metwaly
- Department of Pharmacognosy, Faculty of Pharmacy (Boys), Al-Azhar University, Cairo, Egypt
| | - Amany Belal
- Department of Medicinal Chemistry, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt.,Department of Pharmaceutical Chemistry, College of Pharmacy, Taif University, Taif, Saudi Arabia
| | - Ahmed B M Mehany
- Department of Zoology, Faculty of Science, Al-Azhar University, Cairo, Egypt
| | - Rezk R Ayyad
- Pharmaceutical Medicinal Chemistry Department, Faculty of Pharmacy (Boys), Al-Azhar University, Cairo, Egypt
| | - Khaled El-Adl
- Pharmaceutical Medicinal Chemistry Department, Faculty of Pharmacy (Boys), Al-Azhar University, Cairo, Egypt.,Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Drug Technology, Heliopolis University for Sustainable Development, Cairo, Egypt
| | - Hazem A Mahdy
- Pharmaceutical Medicinal Chemistry Department, Faculty of Pharmacy (Boys), Al-Azhar University, Cairo, Egypt
| | - Mohammed S Taghour
- Pharmaceutical Medicinal Chemistry Department, Faculty of Pharmacy (Boys), Al-Azhar University, Cairo, Egypt
| | - Kamal M A El-Gamal
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy (Boys), Al-Azhar University, Cairo, Egypt
| | - Mohamad E El-Sawah
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy (Boys), Al-Azhar University, Cairo, Egypt
| | - Souad A Elmetwally
- Department of Basic Science, Higher Technological Institute, 10th of Ramadan City, Egypt
| | - Mostafa A Elhendawy
- National Center for Natural Products Research, University of Mississippi, Mississippi
| | - Mohamed M Radwan
- National Center for Natural Products Research, University of Mississippi, Mississippi.,Department of Pharmacognosy, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
| | - Mahmoud A ElSohly
- National Center for Natural Products Research, University of Mississippi, Mississippi.,Department of Pharmaceutics and Drug Delivery, University of Mississippi, Mississippi, Mississippi
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