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Fawzy SM, Loksha YM, El-Sadek M, Ibrahim SM, Beshay BY, Shamaa MM, Kothayer H. Synthesis of 1,2,4-triazole and 1,3,4-oxadiazole derivatives as inhibitors for STAT3 enzymes of breast cancer. Arch Pharm (Weinheim) 2023; 356:e2300345. [PMID: 37661355 DOI: 10.1002/ardp.202300345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/14/2023] [Accepted: 08/16/2023] [Indexed: 09/05/2023]
Abstract
Disubstituted five-membered heterocycles (1,2,4-triazole and 1,3,4 oxadiazole) were synthesized and investigated as inhibitors for signal transducer and activator of transcription 3 (STAT3) enzyme of breast cancer. 3-(Benzylthio)-5-(4-chlorobenzyl)-4H-1,2,4-triazol-4-amine (12d) was found to be the most active among the synthesized compounds with a half-maximal inhibitory concentration (IC50 ) value of 1.5 µM on MCF7 cells and was found to show a great inhibitory effect on the STAT3 enzyme. Compounds 9a,b,d,e,f, 11, and 12a,b,f,e show IC50 values in the range of 3-12 µM for the MCF7 cell line. Molecular modeling was used to investigate the biological results of the synthesized compounds.
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Affiliation(s)
- Sherif M Fawzy
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Sinai University, Kantara Branch, Al-Ismailia, Egypt
| | - Yasser M Loksha
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Sinai University, Al-Arish Branch, North Sinai, Egypt
| | - Mohamed El-Sadek
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Samy M Ibrahim
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Botros Y Beshay
- Department of Pharmaceutical Chemistry, College of Pharmacy, Arab Academy for Science, Technology and Maritime Transport, Alexandria, Egypt
| | - Marium M Shamaa
- Department of Biochemistry, Clinical and Biological Sciences Division, College of Pharmacy, Arab Academy for Science, Technology and Maritime Transport, Alexandria, Egypt
| | - Hend Kothayer
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
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2
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Emam A, Kothayer H, Ibrahim S, El-Sadek M. Synthesis and Antibacterial Evaluation of New developed 2,3-Dihydroquinazolin-4(1H)-ones. Egypt J Chem 2022. [DOI: 10.21608/ejchem.2023.14892.1905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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3
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Emam AM, Dahal A, Singh SS, Tosso RD, Ibrahim SM, El-Sadek M, Jois SD, Enriz RD, Kothayer H. Quinazoline-tethered hydrazone: A versatile scaffold toward dual anti-TB and EGFR inhibition activities in NSCLC. Arch Pharm (Weinheim) 2021; 354:e2100281. [PMID: 34585758 DOI: 10.1002/ardp.202100281] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 08/02/2021] [Revised: 09/07/2021] [Accepted: 09/08/2021] [Indexed: 11/07/2022]
Abstract
Globally, lung cancer and tuberculosis are considered to be very serious and complex diseases. Evidence suggests that chronic infection with tuberculosis (TB) can often lead to lung tumors; therefore, developing drugs that target both diseases is of great clinical significance. In our study, we designed and synthesized a suite of 14 new quinazolinones (5a-n) and performed biological investigations of these compounds in Mycobacterium tuberculosis (MTB) and cancer cell lines. In addition, we conducted a molecular modeling study to determine the mechanism of action of these compounds at the molecular level. Compounds that showed anticancer activity in the preliminary screening were further evaluated in three cancer cell lines (A549, Calu-3, and BT-474 cells) and characterized in an epidermal growth factor receptor (EGFR) binding assay. Cytotoxicity in noncancerous lung fibroblast cells was also evaluated to obtain safety data. Our theoretical and experimental studies indicated that our compounds showed a mechanism of action similar to that of erlotinib by inhibiting the EGFR tyrosine kinase. In turn, the antituberculosis activity of these compounds would be produced by the inhibition of enoyl-ACP-reductase. From our findings, we were able to identify two potential lead compounds (5i and 5l) with dual activity and elevated safety toward noncancerous lung fibroblast cells. In addition, our data identified three compounds with excellent anti-TB activities (compounds 5i, 5l, and 5n).
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Affiliation(s)
- Aya M Emam
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Achyut Dahal
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, Louisiana, USA
| | - Sitanshu S Singh
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, Louisiana, USA
| | - Rodrigo D Tosso
- Pharmacy Department, Facultad de Química, Bioquímica y Farmacia, IMIBIO-CONICET, Universidad Nacional de San Luis, San Luis, Argentina
| | - Samy M Ibrahim
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Mohamed El-Sadek
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Seetharama D Jois
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, Louisiana, USA
| | - Ricardo D Enriz
- Pharmacy Department, Facultad de Química, Bioquímica y Farmacia, IMIBIO-CONICET, Universidad Nacional de San Luis, San Luis, Argentina
| | - Hend Kothayer
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
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Elewa M, Maltar-Strmečki N, Said MM, El Shihawy HA, El-Sadek M, Frank J, Drescher S, Drescher M, Mäder K, Hinderberger D, Imming P. Synthesis and EPR-spectroscopic characterization of the perchlorotriarylmethyl tricarboxylic acid radical (PTMTC) and its 13C labelled analogue (13C-PTMTC). Phys Chem Chem Phys 2018; 19:6688-6697. [PMID: 28210718 DOI: 10.1039/c6cp07200c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A hydrophilic tris(tetrachlorotriaryl)methyl (tetrachloro-TAM) radical labelled 50% with 13C at the central carbon atom was prepared. The mixture of isotopologue radicals was characterised by continuous wave and pulsed X-band electron paramagnetic spectroscopy (EPS). For the pharmaceutical and medical applications planned, the quantitative influence of oxygen, viscosity, temperature and pH on EPR line widths was studied in aqueous buffer, DMSO, water-methanol and water-glycerol mixtures. Under in vivo conditions, pH can be disregarded. There is a clear oxygen dependence of the width of the 12C isotopologue single EPR line in aqueous solutions while changes in rotational motion (viscosity) are observable only in the doublet lines of the central carbon of the 13C isotopologue. The tetrachloro-TAM proved to be very stable as a solid. Its thermal decay was determined quantitatively by thermal annealing. Towards ascorbic acid as a reducing agent and towards an oocyte cell extract it had a half-life of approx. 60 and 10 min. Thus for in vivo applications, 50% 13C tetrachloro-TAMs are suitable for selective and simultaneous oxygen and macroviscosity measurements in a formulation, e.g. nanocapsules.
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Affiliation(s)
- Marwa Elewa
- Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle, Germany. and Faculty of Pharmacy, Suez Canal University, P.O. 41522, Ismailia, Egypt
| | - Nadica Maltar-Strmečki
- Institut für Chemie, Physikalische Chemie, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle, Germany.
| | - Mohamed M Said
- Faculty of Pharmacy, Suez Canal University, P.O. 41522, Ismailia, Egypt
| | | | | | - Juliane Frank
- Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle, Germany.
| | - Simon Drescher
- Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle, Germany.
| | - Malte Drescher
- Department of Chemistry and Konstanz Research School Chemical Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Karsten Mäder
- Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle, Germany.
| | - Dariush Hinderberger
- Institut für Chemie, Physikalische Chemie, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle, Germany.
| | - Peter Imming
- Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle, Germany.
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Ali H, El-Sadek M, Morsi M, El-Barawy K, Abou-Shahba R. Up-grading of locally produced metallurgical grade silicon (MG-Si). Egypt J Chem 2017. [DOI: 10.21608/ejchem.2017.2074.1171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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6
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Hamdy R, Ziedan NI, Ali S, Bordoni C, El-Sadek M, Lashin E, Brancale A, Jones AT, Westwell AD. Synthesis and evaluation of 5-(1H-indol-3-yl)-N-aryl-1,3,4-oxadiazol-2-amines as Bcl-2 inhibitory anticancer agents. Bioorg Med Chem Lett 2016; 27:1037-1040. [PMID: 28087272 DOI: 10.1016/j.bmcl.2016.12.061] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 12/22/2016] [Accepted: 12/24/2016] [Indexed: 11/18/2022]
Abstract
A series of 5-(1H-indol-3-yl)-N-aryl-1,3,4-oxadiazol-2-amines 8a-j has been designed, synthesized and tested in vitro as potential pro-apoptotic Bcl-2-inhibitory anticancer agents based on our previous lead compound 8a. Synthesis of the target compounds was readily accomplished through a cyclisation reaction between indole-3-carboxylic acid hydrazide (5) and substituted isothiocyanates 6a-j, followed by oxidative cyclodesulfurization of the corresponding thiosemicarbazide 7a-j using 1,3-dibromo-5,5-dimethylhydantoin. Active compounds of the series 8a-j were found to have sub-micromolar IC50 values selectively in Bcl-2 expressing human cancer cell lines; notably the 2-nitrophenyl analogue 8a was found to exhibit potent activity, and compounds 8a and 8e possessed comparable Bcl-2 binding affinity (ELISA assay) to the established natural product-based Bcl-2 inhibitor, gossypol. Molecular modeling studies helped to further rationalise anti-apoptotic Bcl-2 binding, and identified compounds 8a and 8e as candidates for further development as Bcl-2 inhibitory anticancer agents.
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Affiliation(s)
- Rania Hamdy
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff CF10 3NB, Wales, UK; Faculty of Pharmacy, Zagazig University, Egypt
| | - Noha I Ziedan
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff CF10 3NB, Wales, UK; Faculty of Pharmacy, Zagazig University, Egypt
| | - Samia Ali
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff CF10 3NB, Wales, UK; National Research Centre, Cairo, Egypt
| | - Cinzia Bordoni
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff CF10 3NB, Wales, UK
| | | | | | - Andrea Brancale
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff CF10 3NB, Wales, UK
| | - Arwyn T Jones
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff CF10 3NB, Wales, UK
| | - Andrew D Westwell
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff CF10 3NB, Wales, UK.
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Affiliation(s)
- Mahmoud F. El-Minawi
- Department of Obstetrics and Gynecology; Kasr-Elaini Hospital; Faculty of Medicine; Cairo University; Cairo Egypt
| | - Hussein Shaaban
- Department of Obstetrics and Gynecology; Kasr-Elaini Hospital; Faculty of Medicine; Cairo University; Cairo Egypt
| | - Y. Naguib
- Department of Obstetrics and Gynecology; Kasr-Elaini Hospital; Faculty of Medicine; Cairo University; Cairo Egypt
| | - M. El-Sadek
- Department of Obstetrics and Gynecology; Kasr-Elaini Hospital; Faculty of Medicine; Cairo University; Cairo Egypt
| | - A. Shaaban
- Department of Obstetrics and Gynecology; Kasr-Elaini Hospital; Faculty of Medicine; Cairo University; Cairo Egypt
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8
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Frank J, Elewa M, Said MM, El Shihawy HA, El-Sadek M, Müller D, Meister A, Hause G, Drescher S, Metz H, Imming P, Mäder K. Synthesis, Characterization, and Nanoencapsulation of Tetrathiatriarylmethyl and Tetrachlorotriarylmethyl (Trityl) Radical Derivatives—A Study To Advance Their Applicability as in Vivo EPR Oxygen Sensors. J Org Chem 2015; 80:6754-66. [PMID: 26020133 DOI: 10.1021/acs.joc.5b00918] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Tissue oxygenation plays an important role in the pathophysiology of various diseases and is often a marker of prognosis and therapeutic response. EPR (ESR) is a suitable noninvasive oximetry technique. However, to reliably deploy soluble EPR probes as oxygen sensors in complex biological systems, there is still a need to investigate and improve their specificity, sensitivity, and stability. We reproducibly synthesized various derivatives of tetrathiatriarylmethyl and tetrachlorotriarylmethyl (trityl) radicals. Hydrophilic radicals were investigated in aqueous solution mimicking physiological conditions by, e.g., variation of viscosity and ionic strength. Their specificity was satisfactory, but the oxygen sensitivity was low. To enhance the capability of trityl radicals as oxygen sensors, encapsulation into oily core nanocapsules was performed. Thus, different lipophilic triesters were prepared and characterized in oily solution employing oils typically used in drug formulations, i.e., middle-chain triglycerides and isopropyl myristate. Our screening identified the deuterated ethyl ester of D-TAM (radical 13) to be suitable. It had an extremely narrow single EPR line under anoxic conditions and excellent oxygen sensitivity. After encapsulation, it retained its oxygen responsiveness and was protected against reduction by ascorbic acid. These biocompatible and highly sensitive nanosensors offer great potential for future EPR oximetry applications in preclinical research.
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Affiliation(s)
- Juliane Frank
- †Institut für Pharmazie, Martin-Luther-Universität (MLU) Halle-Wittenberg, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
| | - Marwa Elewa
- †Institut für Pharmazie, Martin-Luther-Universität (MLU) Halle-Wittenberg, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany.,‡Faculty of Pharmacy, Suez Canal University, P.O. 41522, Ismailia, Egypt
| | - Mohamed M Said
- ‡Faculty of Pharmacy, Suez Canal University, P.O. 41522, Ismailia, Egypt
| | - Hosam A El Shihawy
- ‡Faculty of Pharmacy, Suez Canal University, P.O. 41522, Ismailia, Egypt
| | | | - Diana Müller
- †Institut für Pharmazie, Martin-Luther-Universität (MLU) Halle-Wittenberg, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
| | - Annette Meister
- ⊥Center for Structure and Dynamics of Proteins (MZP), Biocenter Martin-Luther-Universität (MLU) Halle-Wittenberg, Weinbergweg 22, 06120 Halle (Saale), Germany
| | - Gerd Hause
- #Biocenter Martin-Luther-Universität (MLU) Halle-Wittenberg, Weinbergweg 22, 06120 Halle (Saale), Germany
| | - Simon Drescher
- †Institut für Pharmazie, Martin-Luther-Universität (MLU) Halle-Wittenberg, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
| | - Hendrik Metz
- †Institut für Pharmazie, Martin-Luther-Universität (MLU) Halle-Wittenberg, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
| | - Peter Imming
- †Institut für Pharmazie, Martin-Luther-Universität (MLU) Halle-Wittenberg, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
| | - Karsten Mäder
- †Institut für Pharmazie, Martin-Luther-Universität (MLU) Halle-Wittenberg, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
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9
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Heneedak HM, Salama I, Mostafa S, El-Kady E, El-Sadek M. Development and validation of a sensitive UHPLC-MS/MS method for the simultaneous analysis of tramadol, dextromethorphan chlorpheniramine and their major metabolites in human plasma in forensic context: application to pharmacokinetics. Biomed Chromatogr 2014; 29:998-1007. [PMID: 25417559 DOI: 10.1002/bmc.3384] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [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: 12/11/2013] [Revised: 08/29/2014] [Accepted: 10/13/2014] [Indexed: 11/07/2022]
Abstract
The prerequisites for forensic confirmatory analysis by LC/MS/MS with respect to European Union guidelines are chromatographic separation, a minimum number of two MS/MS transitions to obtain the required identification points and predefined thresholds for the variability of the relative intensities of the MS/MS transitions (MRM transitions) in samples and reference standards. In the present study, a fast, sensitive and robust method to quantify tramadol, chlorpheniramine, dextromethorphan and their major metabolites, O-desmethyltramadol, dsmethyl-chlorpheniramine and dextrophan, respectively, in human plasma using ibuprofen as internal standard (IS) is described. The analytes and the IS were extracted from plasma by a liquid-liquid extraction method using ethyl acetate-diethyl-ether (1:1). Extracted samples were analyzed by ultra-high-performance liquid chromatography coupled to electrospray ionization tandem mass spectrometry (UHPLC-ESI-MS/MS). Chromatographic separation was performed by pumping the mobile phase containing acetonitrile, water and formic acid (89.2:11.7:0.1) for 2.0 min at a flow rate of 0.25 μL/min into a Hypersil-Gold C18 column, 20 × 2.0 mm (1.9 µm) from Thermoscientific, New York, USA. The calibration curve was linear for the six analytes. The intraday precision (RSD) and accuracy (RE) of the method were 3-9.8 and -1.7-4.5%, respectively. The analytical procedure herein described was used to assess the pharmacokinetics of the analytes in 24 healthy volunteers after a single oral dose containing 50 mg of tramadol hydrochloride, 3 mg chlorpheniramine maleate and 15 mg of dextromethorphan hydrobromide.
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Affiliation(s)
- Hala M Heneedak
- Analytical Toxicology Laboratory, Forensic Medicine Authority, Ismailia, Egypt
| | - Ismail Salama
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Suez Canal University, Ismailia, Egypt
| | - Samia Mostafa
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Suez Canal University, Ismailia, Egypt
| | - Ehab El-Kady
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Mohamed El-Sadek
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
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Kishk SM, Salama I, Mostafa S, El-Sadek M. STABILITY-INDICATING CHROMATOGRAPHIC METHOD FOR THE DETERMINATION OF BENZONATATE, DIPHENHYDRAMINE, GUAIFENESIN, AND PHENYLEPHRINE. J LIQ CHROMATOGR R T 2014. [DOI: 10.1080/10826076.2012.758140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Safaa M. Kishk
- a Department of Pharmaceutical Chemistry, Faculty of Pharmacy , Suez Canal University , Ismailia , Egypt
| | - Ismail Salama
- a Department of Pharmaceutical Chemistry, Faculty of Pharmacy , Suez Canal University , Ismailia , Egypt
| | - Samia Mostafa
- a Department of Pharmaceutical Chemistry, Faculty of Pharmacy , Suez Canal University , Ismailia , Egypt
| | - Mohamed El-Sadek
- b Department of Medicinal Chemistry, Faculty of Pharmacy , Zagazig University , Zagazig , Egypt
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Heneedak H, Salama I, Mostafa S, El-Sadek M. A Stability-indicating HPLC Method for the Simultaneous Determination of Mebeverine Hydrochloride and Chlordiazepoxide in Commercial Tablets. CURR ANAL CHEM 2013. [DOI: 10.2174/15734110113099990040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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Hamdy R, Ziedan N, Ali S, El-Sadek M, Lashin E, Brancale A, Jones AT, Westwell AD. Synthesis and evaluation of 3-(benzylthio)-5-(1H-indol-3-yl)-1,2,4-triazol-4-amines as Bcl-2 inhibitory anticancer agents. Bioorg Med Chem Lett 2013; 23:2391-4. [DOI: 10.1016/j.bmcl.2013.02.029] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Revised: 02/01/2013] [Accepted: 02/07/2013] [Indexed: 10/27/2022]
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Darwish KM, Salama I, Mostafa S, El-Sadek M. RP-HPLC/Pre-Column Derivatization for Analysis of Omeprazole, Tinidazole, Doxycycline and Clarithromycin. J Chromatogr Sci 2012; 51:566-76. [DOI: 10.1093/chromsci/bms167] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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14
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Heneedak HM, Salama I, Mostafa S, El-Sadek M. HPLC and chemometric methods for the simultaneous determination of miconazole nitrate and nystatin. J Chromatogr Sci 2012; 50:855-61. [PMID: 22879356 DOI: 10.1093/chromsci/bms127] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
High-performance liquid chromatography (HPLC) and chemometric methods were applied to the simultaneous determination of the two nonsteroidal antifungal drugs, miconazole (MIC) and nystatin (NYS). The applied chemometric techniques are multivariate methods including classical least squares, principal component regression and partial least squares methods. The ultraviolet (UV) absorption spectra of the standard solutions of the training and validation sets in methanol are recorded in the range of 280-320 nm at 0.2-nm intervals. The HPLC method depends on reversed-phase separation using a C18 column. The mobile phase consists of a mixture of methanol-acetonitrile-ammonium acetate buffer (pH 6; 50 mM) (60:30:10 v/v/v). The UV detector was set at 230 nm. The developed methods were validated and successfully applied to the simultaneous determination of MIC and NYS in their tablets. The assay results obtained using the chemometric methods were statistically compared to those of the HPLC method and good agreement was observed.
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Affiliation(s)
- Hala M Heneedak
- Chemical Laboratory legitimate, Department of Forensic Medicine, Ismailia, Egypt
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Darwish K, Salama I, Mostafa S, El-Sadek M. Validated Stability-Indicating Reversed-Phase-HPLC Method for Simultaneous Determination of Orphenadrine Citrate, Caffeine and Aspirin. Chem Pharm Bull (Tokyo) 2012; 60:1426-36. [DOI: 10.1248/cpb.c12-00596] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Khaled Darwish
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Suez Canal University
| | - Ismail Salama
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Suez Canal University
| | - Samia Mostafa
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Suez Canal University
| | - Mohamed El-Sadek
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University
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Darwish KM, Salama I, Mostafa S, El-Sadek M. Extractional spectrophotometric analysis of metronidazole, tinidazole, ornidazole and secnidazole bases through acid-dye complexation using bromothymol blue dye. Pak J Pharm Sci 2012; 25:207-217. [PMID: 22186332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
An easy, precise and valid extractional-spectrophotometric technique is described for the assessment of metronidazole (MNZ), tinidazole (TNZ), ornidazole (ONZ) and secnidazole (SNZ) in pure state and in their pharmaceutical formulations. The technique includes first the reduction of above cited drugs using HCl and zinc powder, then the formation of intense yellow colored ion-association complex species (1:3 drug/dye) using bromothymol blue (BTB) in a buffered aqueous acidic medium at pH 3-3.50. The colored products are extracted into dichloromethane and quantitatively determined at 416-420 nm. The experimental operating factors influencing the ion-pairs development were studied and optimized to obtain the maximum color intensity. The Beer plots are obeyed in the concentration ranges 2.50-22.50, 2.50-30, 7.50-35 and 5-30 μgml-1 for MNZ, TNZ, ONZ and SNZ, respectively, with correlation coefficients not less than 0.9995. The proposed technique is recommended for the routine quality control analysis of the investigated drugs in commercial tablets with no observed interference from common pharmaceutical adjuvants. Results of such analysis were statistically validated and through recovery studies, showing excellent agreement with those achieved by the reported techniques.
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Affiliation(s)
- Khaled M Darwish
- Department of Pharmaceutical Chemistry, Suez Canal University, Ismailia, Egypt
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Baraka MM, El-Sadek M, Moussa EMM, Abd-Alaty NMA. Spectrophotometric and Atomic Absorption Determination of Ramipril, Enalapril Maleate and Fosinopril through Ternary Complex Formation with Molybdenum (V)-Thiocyanate (Mo(V)-SCN). Chem Pharm Bull (Tokyo) 2008; 56:1521-7. [DOI: 10.1248/cpb.56.1521] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | - Mohamed El-Sadek
- Medicinal Chemistry Department, Faculty of Pharmacy, Zagazig University
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Koriech, E, Moghazy E, Abd-El-Fattah Y, El-Sadek M. STUDIES ON INDUCTION OF POLYPLOIDY AND MOROPHOLOGICAL CHARACTERS OF SNAPDRAGON (Antirrhinum majus) AND LARKSPUR (Delphinum ajacis) PLANTS BY USING COLCHICINE. Journal of Plant Production 2007; 32:8435-8454. [DOI: 10.21608/jpp.2007.220921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Abstract
Two simple, quick and sensitive spectrophotometric methods are described for the determination of enrofloxacin and Pefloxacin. The methods are based on the reaction of these drugs with bromophenol blue (BPB) and methyl orange (MO) in buffered aqueous solution at pH 2.3-2.5 in case of bromophenol blue and at pH 3.6 with MO to give highly coloured complex species, extractable with chloroform. The coloured products are quantitated spectrophotometrically at 420 and 424 nm for BPB and MO, respectively. Optimisation of the different experimental conditions is described. Beer's law is obeyed in the concentration ranges 2-12 and 2-18 microg ml(-1) with BPB and in the ranges 1-12 and 4-40 microg ml(-1)with MO for enrofloxacin and pefloxacin, respectively. The proposed methods are applied for determination of Enroxil oral solution, Peflacine tablets and Peflacine ampoules with mean percentage accuracies 99.5+/-0.99, 99.39+/-1.05 and 100.02+/-0.895, respectively, with BPB and 100.30+/-0.89, 100.25+/-0.98 and 100.20+/-0.72, respectively, with MO.
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Affiliation(s)
- Samia Mostafa
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Suez Canal University, Ismailia, Egypt.
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Mostafa S, El-Sadek M, Alla EA. Spectrophotometric determination of ciprofloxacin, enrofloxacin and pefloxacin through charge transfer complex formation. J Pharm Biomed Anal 2002; 27:133-42. [PMID: 11682219 DOI: 10.1016/s0731-7085(01)00524-6] [Citation(s) in RCA: 113] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A spectrophotometric method was described for the determination of the antibacterial quinolone derivatives, ciprofloxacin, enrofloxacin and pefloxacin through charge transfer complex formation with three different acceptors. Chloranilic acid (CL) was utilized for their determination, forming charge transfer complex with lambdamax 520 nm. The proposed method was applied for determination of Ciprocin tablets, Enroxil oral solution, Peflacin ampoules and Peflacin tablets, with mean percentage accuracies, 99.58+/-1.25,99.94+/-0.96,100.91+/-1.59 and 99.86+/-1.003. Also, tetracyanoethylene (TCNE) was utilized in the determination of the concerned compounds forming charge transfer complexes with maximum absorbances at lambdamax 335 nm for ciprofloxacin and at lambdamax 290 nm for both enrofloxacin and pefloxacin. The procedure was applied for determination of Ciprocin tablets, Enroxil 10% oral solution, Peflacine tablets and Peflacine ampoules with mean percentage accuracies 99.40+/-1.27,99.95+/-0.90,98.98+/-1.565 and 99.88+/-0.998, respectively. Also, 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) was utilized for determination of pefloxacin forming charge transfer complex with maximum absorbance at lambdamax 460 nm. The procedure was applied for determination of peflacine tablets and peflacine ampoules with mean percentage accuracies 100.40+/-0.76 and 99.91+/-0.623, respectively. Statistical analysis of the obtained results showed no significant difference between the proposed method and other official and reported methods as evident from the t-test and variance ratio.
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Affiliation(s)
- Samia Mostafa
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Suez Canal University, Ismailia, Egypt.
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El-Sadek M, Abdel-Aziz L, Abou-Kull M, Metwally K. SYNTHESIS AND BIOLOGICAL EVALUATION OF NOVEL HETEROCYCLIC DERIVATIVES OF FLURBIPROFEN. ACTA ACUST UNITED AC 1998. [DOI: 10.21608/zjps.1998.184818] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Ayad M, El-Sadek M, Mostaffa S. 4-Aminoantipyrine as an Analytical Reagent for the Colorimetric Determination of Tetracycline and Oxytetracycline. ANAL LETT 1986. [DOI: 10.1080/00032718608080875] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Hammad A, El-Sadek M. Application of a Thyristor Controlled Var Compensator for Damping Subsynchronous Oscillations in Power Systems. ACTA ACUST UNITED AC 1984. [DOI: 10.1109/tpas.1984.318608] [Citation(s) in RCA: 87] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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