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Ahmed NM, Mohamed MS, Awad SM, Abd El-Hameed RH, El-tawab NAA, Gaballah MS, Said AM. Design, synthesis, molecular modelling and biological evaluation of novel 6-amino-5-cyano-2-thiopyrimidine derivatives as potent anticancer agents against leukemia and apoptotic inducers. J Enzyme Inhib Med Chem 2024; 39:2304625. [PMID: 38348824 PMCID: PMC10866072 DOI: 10.1080/14756366.2024.2304625] [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: 06/26/2023] [Accepted: 01/08/2024] [Indexed: 02/15/2024] Open
Abstract
Herein, a novel series of 6-amino-5-cyano-2-thiopyrimidines and condensed pyrimidines analogues were prepared. All the synthesized compounds (1a-c, 2a-c, 3a-c, 4a-r and 5a-c) were evaluated for in vitro anticancer activity by the National Cancer Institute (NCI; MD, USA) against 60 cell lines. Compound 1c showed promising anticancer activity and was selected for the five-dose testing. Results demonstrated that compound 1c possessed broad spectrum anti-cancer activity against the nine cancerous subpanels tested with selectivity ratio ranging from 0.7 to 39 at the GI50 level with high selectivity towards leukaemia. Mechanistic studies showed that Compound 1c showed comparable activity to Duvelisib against PI3Kδ (IC50 = 0.0034 and 0.0025 μM, respectively) and arrested cell cycle at the S phase and displayed significant increase in the early and late apoptosis in HL60 and leukaemia SR cells. The necrosis percentage showed a significant increase from 1.13% to 3.41% in compound 1c treated HL60 cells as well as from 1.51% to 4.72% in compound 1c treated leukaemia SR cells. Also, compound 1c triggered apoptosis by activating caspase 3, Bax, P53 and suppressing Bcl2. Moreover, 1c revealed a good safety profile against human normal lung fibroblast cell line (WI-38 cells). Molecular analysis of Duvelisib and compound 1c in PI3K was performed. Finally, these results suggest that 2-thiopyrimidine derivative 1c might serve as a model for designing novel anticancer drugs in the future.
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Affiliation(s)
- Naglaa M. Ahmed
- Pharmaceutical Organic Chemistry Department, Helwan University, Ein-Helwan, Egypt
| | - Mosaad S. Mohamed
- Pharmaceutical Organic Chemistry Department, Helwan University, Ein-Helwan, Egypt
| | - Samir M. Awad
- Pharmaceutical Organic Chemistry Department, Helwan University, Ein-Helwan, Egypt
| | | | | | - Mohamed S. Gaballah
- Biochemistry and Molecular Biology Department, Helwan University, Ein-Helwan, Egypt
| | - Ahmed M. Said
- Pharmaceutical Organic Chemistry Department, Helwan University, Ein-Helwan, Egypt
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, USA
- Athenex Inc, Buffalo, NY, USA
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2
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Abd El-Hameed RH, Mohamed MS, Awad SM, Hassan BB, Khodair MAEF, Mansour YE. Novel benzo chromene derivatives: design, synthesis, molecular docking, cell cycle arrest, and apoptosis induction in human acute myeloid leukemia HL-60 cells. J Enzyme Inhib Med Chem 2023; 38:405-422. [DOI: 10.1080/14756366.2022.2151592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Affiliation(s)
- Rania H. Abd El-Hameed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Mosaad S. Mohamed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Samir M. Awad
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Bardes B. Hassan
- Department of Pathology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | | | - Yara E. Mansour
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
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Bedewy WA, Mohamed MS, Abdelhameed AM, Elsawy MA, Al-Muhur M, Ashida N, Abdalla AN, Elwaie TA, Nagamatsu T, Ali HI. Design, synthesis, and antitumor efficacy of novel 5-deazaflavin derivatives backed by kinase screening, docking, and ADME studies. J Enzyme Inhib Med Chem 2023; 38:2220570. [PMID: 37341389 DOI: 10.1080/14756366.2023.2220570] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2023] Open
Abstract
Novel 5-deazaflavins were designed as potential anticancer candidates. Compounds 4j, 4k, 5b, 5i, and 9f demonstrated high cytotoxicity against MCF-7 cell line with IC50 of 0.5-190nM. Compounds 8c and 9g showed preferential activity against Hela cells (IC50: 1.69 and 1.52 μM respectively). However, compound 5d showed notable potency against MCF-7 and Hela cell lines of 0.1 nM and 1.26 μM respectively. Kinase profiling for 4e showed the highest inhibition against a 20 kinase panel. Additionally, ADME prediction studies exhibited that compounds 4j, 5d, 5f, and 9f have drug-likeness criteria to be considered promising antitumor agents deserving of further investigation. SAR study showed that substitutions with 2-benzylidene hydra zino have a better fitting into PTK with enhanced antiproliferative potency. Noteworthy, the incorporation of hydrazino or ethanolamine moieties at position 2 along with small alkyl or phenyl at N-10, respectively revealed an extraordinary potency against MCF-7 cells with IC50 values in the nanomolar range.
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Affiliation(s)
- Walaa A Bedewy
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Helwan University, Helwan, Egypt
| | - Mosaad S Mohamed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Helwan, Egypt
| | - Ahmed M Abdelhameed
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Helwan University, Helwan, Egypt
| | - Mohamed A Elsawy
- Leicester Institute of Pharmaceutical Innovation, Leicester School of Pharmacy, De Monfort University, Leicester, UK
- School of Pharmacy, Queen's University of Belfast, Belfast, UK
| | | | - Noriyuki Ashida
- Biology Laboratory, Research and Development Division, Yamasa Co., Chiba, Japan
| | - Ashraf N Abdalla
- Department of Pharmacology and Toxicology, Pharmacy College, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Tamer A Elwaie
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Cairo University, Cairo, Egypt
- Department of Pharmaceutical Sciences, Irma Lerma Rangel School of Pharmacy, Texas A&M University, College Station, TX, USA
| | - Tomohisa Nagamatsu
- Faculty of Pharmacological Sciences, Laboratory of Curative Creation Study for Geriatric-diseases Prevention, Sojo University, Kumamoto, Japan
| | - Hamed I Ali
- Department of Pharmaceutical Sciences, Irma Lerma Rangel School of Pharmacy, Texas A&M University, College Station, TX, USA
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Abbas SY, Abd El-Aziz MM, Awad SM, Mohamed MS. Synthesis and evaluation of antipyrine derivatives bearing a thiazole moiety as antibacterial and antifungal agents. SYNTHETIC COMMUN 2023:1-11. [DOI: 10.1080/00397911.2023.2248306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Indexed: 09/02/2023]
Affiliation(s)
- Samir Y. Abbas
- Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo, Egypt
| | - Maha M. Abd El-Aziz
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Samir M. Awad
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Mosaad S. Mohamed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
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Mohd Ghazi A, Abdul Ghapar AK, Abdul Malek AM, Ross NT, Zainal Abidin I, Mat Lawi F, Foo YW, Mahadevan G, Muthusamy TS, Queck GT, Cham YL, Abdul Wahab MJ, Mohamed MS, Zainal Abidin SK, Wan Ahmad WA. Key comorbidities and laboratory findings: insights from first prospective, observational and Multi-Center Malaysia Heart Failure (MYHF) registry. Eur Heart J 2023. [DOI: 10.1093/eurheartj/ehac779.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Private company. Main funding source(s): Novartis Corporation Sdn Bhd
Background
In real world settings, factors that may affect prognosis of HF patients include comorbidities, lack of guideline-directed medical therapies (GDMT) and laboratory findings in particular elevated cardiac biomarkers.
Purpose
This report aimed to provide insights into these important clinical characteristics in hospitalized HF patients.
Methods
MYHF registry is a prospective, observational study of symptomatic HF patients (NYHA II-IV) hospitalized in 18 tertiary care centers in Malaysia over a period of 3 years starting in 2019. The key comorbidities, GDMT and natriuretic peptides (NP) utilization in hospitalized HF patients enrolled in MYHF Registry will be analyzed.
Results
A total of 2,717 patients, mean age 60.17 years (SD 13.62) and predominantly males (66.8%) were recruited. Mean left ventricular ejection fraction (LVEF) was 36.5% (SD 15.3); with 64.6% HFrEF (LVEF ≤40%), 21.6% HFpEF (LVEF ≥50%) and 11.3% HFmrEF (LVEF 41-49%). Hypertension was the most common comorbidity (71.5%), followed by diabetes (59.8%), ischemic heart disease (55.9%), dyslipidemia (46.6%) and chronic kidney disease (30.9%). At admission, mean SBP was 137.6 mmHg (SD 29), with 5.9% and 42.6% of patients with SBP < 100 mmHg and ≥ 140 mmHg, respectively. Mean HbA1c value was 7.56% (SD 2.0). Mean total cholesterol and LDL-C were 4.30 mmol/L (SD 1.66) and 2.62 mmol/L (SD 1.34), respectively. At admission, mean serum creatinine was 145.76 umol/L (SD 119.64) and 1 out of 2 patients (55.1%) had eGFR <60 mL/min/1.73 m2. Utilization of natriuretic peptide as biomarker was low (16.5%), with NTproBNP being more commonly used (81.5%). Half (49.2%) of patients with NT-proBNP measured had values >=5000 pg/ml. Hospitalization has been known to provide good opportunity for GDMT optimization. Although about two third (59.2%) of patients in this registry had previous history of heart failure hospitalization, only 33.7% of patients were on dual GDMT (ACEi/ARB/ARNI +BB) and 1 out of 10 (13.5%) were on triple GDMT (ACEi/ARB/ARNI+BB+MRA) during admission.
Conclusions
Hospitalized HF patients in MYHF registry are generally young, with high prevalence of co-morbidities, worse laboratory findings and had under-utilization of GDMT. The knowledge gained will be crucial for guiding management of HF patients to improve the prognosis.
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Affiliation(s)
- A Mohd Ghazi
- Institut Jantung Negara , Kuala Lumpur , Malaysia
| | | | - A M Abdul Malek
- Hospital Serdang, Department of Cardiology , Serdang , Malaysia
| | - N T Ross
- Hospital Kuala Lumpur, Medical Department , Kuala Lumpur , Malaysia
| | - I Zainal Abidin
- University Malaya Medical Centre (UMMC), Department of Cardiology , Kuala Lumpur , Malaysia
| | - F Mat Lawi
- Hospital Serdang, Department of Cardiology , Serdang , Malaysia
| | - Y W Foo
- Novartis Corporation (Sdn Bhd) , Kuala Lumpur , Malaysia
| | - G Mahadevan
- Hospital Sultanah Aminah, Department of Cardiology , Johor Bahru , Malaysia
| | - T S Muthusamy
- Cardiac Vascular Sentral Kuala Lumpur (CVSKL) , Kuala Lumpur , Malaysia
| | - G T Queck
- Hospital Melaka, Department of Medicine , Melaka , Malaysia
| | - Y L Cham
- Sarawak Heart Center, Department of Cardiology , Sarawak , Malaysia
| | - M J Abdul Wahab
- Penang Hospital, Department of Cardiology , Penang , Malaysia
| | - M S Mohamed
- Hospital Raja Perempuan Zainab II, Cardiology Unit , Kelantan , Malaysia
| | - S K Zainal Abidin
- Hospital Tengku Ampuan Afzan, Department of Cardiology , Kuantan , Malaysia
| | - W A Wan Ahmad
- University Malaya Medical Centre (UMMC), Department of Cardiology , Kuala Lumpur , Malaysia
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Abbas SY, Abd El-Aziz MM, Awad SM, Mohamed MS. Structural hybrids of sulfonamide and thiazole moieties: Synthesis and evaluation of antimicrobial activity. SYNTHETIC COMMUN 2022. [DOI: 10.1080/00397911.2022.2150086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Samir Y. Abbas
- Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo, Egypt
| | - Maha M. Abd El-Aziz
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Samir M. Awad
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Mosaad S. Mohamed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
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Abd El-Hameed RH, Mahgoub S, El-Shanbaky HM, Mohamed MS, Ali SA. Utility of novel 2-furanones in synthesis of other heterocyclic compounds having anti-inflammatory activity with dual COX2/LOX inhibition. J Enzyme Inhib Med Chem 2021; 36:977-986. [PMID: 33957835 PMCID: PMC8118430 DOI: 10.1080/14756366.2021.1908277] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Inflammation is associated with the development of several diseases comprising cancer and cardiovascular disease. Agents that suppress cyclooxygenase (COX) and lipoxygenase (LOX) enzymes, besides chemokines have been suggested to minimise inflammation. Here, a variety of novel heterocyclic and non-heterocyclic compounds were prepared from novel three furanone derivatives. The structures of all synthesised compounds were confirmed by elemental and spectral analysis including mass, IR, and 1H-NMR spectroscopy. Anti-inflammatory activities of these synthesised compounds were examined in vitro against COX enzymes, 15-LOX, and tumour necrosis factor-α (TNF-α), using inhibition screening assays. The majority of these derivatives showed significant to high activities, with three pyridazinone derivatives (5b, 8b, and 8c) being the most promising anti-inflammatory agents with dual COX-2/15-LOX inhibition activities along with high TNF-α inhibition activity.
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Affiliation(s)
- Rania H Abd El-Hameed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Shahenda Mahgoub
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Hend M El-Shanbaky
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Mosaad S Mohamed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Sahar A Ali
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Helwan University, Cairo, Egypt
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8
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Awad SM, Mohamed MS, Khodair MAEF, El-Hameed RHA. Synthesis and Evaluation of Cytotoxic Activity of Certain Benzo[h]chromene Derivatives. Anticancer Agents Med Chem 2021; 21:963-986. [PMID: 32981512 DOI: 10.2174/1871520620666200925103742] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 03/22/2020] [Revised: 07/21/2020] [Accepted: 08/08/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Benzo[h]chromenes attracted great attention because of their widespread biological activities, including anti-proliferate activity, and the discovery of novel effective anti-cancer agents is imperative. OBJECTIVE The main objective was to synthesize new benzo[h]chromene derivatives and some reported derivatives, and then test all of them for their anti-cancer activities. METHODS The structures of the newly synthesized derivatives were confirmed by elemental and spectral analysis (IR, Mass, 1H-NMR and 13C-NMR). 35 compounds were selected by the National Cancer Institute (NCI) for single-dose testing against 60 cell lines and 3 active compounds were selected for 5-doses testing. Also, these 3 compounds were tested as EGFR-inhibitors; using sorafenib as standard, and as Tubulin polymerization inhibitors using colchicines as a standard drug. Moreover, molecular docking study for the most active derivative on these 2 enzymes was also carried out. RESULTS Compounds 1a, 1c and 2b have the highest activities among all 35 tested compounds especially compound 1c. CONCLUSION compound 1c has promising anti-cancer activities compared to the used standards and may need further modification and investigations.
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Affiliation(s)
- Samir M Awad
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Helwan, Cairo, Egypt
| | - Mosaad S Mohamed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Helwan, Cairo, Egypt
| | | | - Rania H Abd El-Hameed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Helwan, Cairo, Egypt
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9
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El-Hawary SS, Tadros SH, AbdelMohsen MM, Mohamed MS, El Sheikh E, Nazif NM, ElNasr MS. Phyto- and Bio-Chemical evaluation of Diospyros kaki L. cultivated in Egypt and its biological activities. BRAZ J BIOL 2019; 80:295-304. [PMID: 31389482 DOI: 10.1590/1519-6984.200460] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 02/18/2019] [Indexed: 11/21/2022] Open
Abstract
Diospyros kaki L. or Costata cultivar is the main persimmon variety progressively consumed in the Egyptian market and exportation. The objective of this study was to investigate the bioprotective effects of the alcoholic extract of fruits as well as leaves of D. kaki using in-vivo rat models. Petroleum ether extracts of fruits and leaves were analytically characterized for saponifiable and unsaponifiable compounds by GC/MS. Main flavonoids were chromatographically isolated from 80% aqueous methanol extract of leaves. Chemical evaluation for fruits and leaves namely, content of moisture, ash, proteins, fatty acids, amino acids, fat and water soluble vitamins, minerals, carotenoids was carried out. Total antioxidant activity was determined by radical scavenging effects using DPPH assay. The effect on biochemical parameters and its biological activity were also performed. Results revealed the identification of the major compounds of saponifiable and unsaponifiable matters of fruits and leaves. Scopoletin, as well as, kaempferol, luteolin, rutin and apigenin 7-O-glucoside were isolated and identified. It showed that this plant can provide a good nutritional value and it is safe regarding the kidney and liver functions, good source that help in enhancing the antioxidant defense against free radicals. No abnormal effects were found in lipids profile on experimental animals and there were good results in the ratio of HDL and LDL cholesterol. Also, this plant can help in optimizing blood sugar, enhancing the level of blood haemoglobin. It is concluded that D. kaki displays a good source of nutrients and bioactive compounds that may contribute to its therapeutic benefits against the risk of disease complications.
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Affiliation(s)
- S S El-Hawary
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr-EL-Ainy St., Cairo 11562, Egypt
| | - S H Tadros
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr-EL-Ainy St., Cairo 11562, Egypt
| | - M M AbdelMohsen
- Phytochemistry Department, National Research Centre, 33 El-Bohouth St., Former El Tahrir St., P.O.12622, Dokki, Giza, Egypt
| | - M S Mohamed
- Nutrition and Food Sciences Department, National Research Centre, 33 El-Bohouth St., Former El Tahrir St., P.O.12622, Dokki, Giza, Egypt
| | - E El Sheikh
- Phytochemistry Department, National Research Centre, 33 El-Bohouth St., Former El Tahrir St., P.O.12622, Dokki, Giza, Egypt
| | - N M Nazif
- Phytochemistry Department, National Research Centre, 33 El-Bohouth St., Former El Tahrir St., P.O.12622, Dokki, Giza, Egypt
| | - M S ElNasr
- Phytochemistry Department, National Research Centre, 33 El-Bohouth St., Former El Tahrir St., P.O.12622, Dokki, Giza, Egypt
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Mohamed MS, Sayed AI, Khedr MA, Nofal S, Soror SH. Evaluation of novel pyrrolopyrimidine derivatives as antiviral against gastroenteric viral infections. Eur J Pharm Sci 2018; 127:102-114. [PMID: 30366078 DOI: 10.1016/j.ejps.2018.10.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 05/01/2018] [Revised: 10/20/2018] [Accepted: 10/22/2018] [Indexed: 11/19/2022]
Abstract
Viral gastroenteritis is a major global public-health threat. All age groups are susceptible for this infection, but its most serious consequences affect children. Rotavirus, Coxsackievirus and Adenovirus are the most common viruses that cause gastroenteritis. Herein, we synthesized novel pyrrole, pyrrolo[2,3‑d]pyrimidine and pyrrolo[3,2‑e][1,2,4]triazolo[4,3‑c]pyrimidine derivatives. The non-toxic doses of these compounds were determined using BGM cell lines. We examined all the new compounds for their anti-viral activities against Rotavirus Wa strain and Coxsackievirus B4. Compounds 2a, 2d, 5a, 5c, 5d, 7b, 7j, 7n, 14b, 14c, 14e and 14f exhibited significant antiviral activity. We interpreted the action of these compounds using molecular docking against the homology models of viral polymerase enzymes of these viruses. RMSD value of 5d/Coxsackievirus was higher than the RMSD value for 5d/rotavirus and hence better as a stability parameter, which can be correlated to the biological activity.
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Affiliation(s)
- Mosaad S Mohamed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Ain Helwan, Cairo, Egypt
| | - Amira I Sayed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Ain Helwan, Cairo, Egypt
| | - Mohammed A Khedr
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Helwan University, Ain Helwan, Cairo, Egypt
| | - Shahira Nofal
- Department of Pharmacology and Toxicology, faculty of Pharmacy, Helwan University, Ain Helwan, Cairo, Egypt
| | - Sameh H Soror
- Biochemistry and Molecular Biology Department, Faculty of Pharmacy, Helwan University, Ain Helwan, Cairo, Egypt; Center for scientific excellence "Helwan Structural Biology Research (HSBR)", Cairo, Egypt..
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Mohamed MS, Mansour YE, Amin HK, El-Araby ME. Molecular modelling insights into a physiologically favourable approach to eicosanoid biosynthesis inhibition through novel thieno[2,3-b]pyridine derivatives. J Enzyme Inhib Med Chem 2018; 33:755-767. [PMID: 29651867 PMCID: PMC6009894 DOI: 10.1080/14756366.2018.1457657] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
In this research, we exploited derivatives of thieno[2,3-b]pyridine as dual inhibitors of the key enzymes in eicosanoid biosynthesis, cyclooxygenase (COX, subtypes 1 and 2) and 5-lipoxygensase (5-LOX). Testing these compounds in a rat paw oedema model revealed potency higher than ibuprofen. The most active compounds 7a, 7b, 8b, and 8c were screened against COX-1/2 and 5-LOX enzymes. Compound 7a was the most powerful inhibitor of 5-LOX with IC50 = 0.15 µM, while its p-chloro analogue 7b was more active against COX-2 (IC50 = 7.5 µM). The less desirable target COX-1 was inhibited more potently by 8c with IC50 = 7.7 µM. Surflex docking programme predicted that the more stable anti- conformer of compound (7a) formed a favourable complex with the active site of 5-LOX but not COX-1. This is in contrast to the binding mode of 8c, which resembles the syn-conformer of series 7 and binds favourably to COX-1.
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Affiliation(s)
- Mosaad S Mohamed
- a Department of Pharmaceutical Organic Chemistry , Faculty of Pharmacy, Helwan University , Cairo , Egypt
| | - Yara E Mansour
- a Department of Pharmaceutical Organic Chemistry , Faculty of Pharmacy, Helwan University , Cairo , Egypt
| | - Hatem K Amin
- b Department of Biochemistry and Molecular Biology , Faculty of Pharmacy, Helwan University , Cairo , Egypt
| | - Moustafa E El-Araby
- a Department of Pharmaceutical Organic Chemistry , Faculty of Pharmacy, Helwan University , Cairo , Egypt
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12
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Mohamed MS, Sadowski D, Johnson D, Wong C. A207 POST-COLONOSCOPY COLORECTAL CANCERS IN ALBERTA: ROOM FOR QUALITY IMPROVEMENT. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy009.207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - D Sadowski
- University of Alberta, Edmonton, AB, Canada
| | - D Johnson
- University of Alberta, Edmonton, AB, Canada
| | - C Wong
- University of Alberta, Edmonton, AB, Canada
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Mohamed MS, Johnson D, Sadowski D, Wong C. A62 POST COLONOSCOPY COLORECTAL CANCERS IN ALBERTA. A PROCESS FOR IDENTIFYING TRUE CASES. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy008.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- M S Mohamed
- Division of Gastroenterology, University of Alberta, Edmonton, AB, Canada
| | - D Johnson
- Physician Learning Program, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB, Canada
| | - D Sadowski
- Division of Gastroenterology, University of Alberta, Edmonton, AB, Canada
| | - C Wong
- Division of Gastroenterology, University of Alberta, Edmonton, AB, Canada
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Fatahala SS, Mohamed MS, Youns M, Abd-El Hameed RH. Synthesis and Evaluation of Cytotoxic Activity of Some Pyrroles and Fused Pyrroles. Anticancer Agents Med Chem 2017; 17:1014-1025. [PMID: 28042776 DOI: 10.2174/1871520617666170102152928] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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: 04/23/2016] [Revised: 10/31/2016] [Accepted: 12/24/2016] [Indexed: 11/22/2022]
Abstract
AIMS Pyrrole derivatives represent a very interesting class as biologically active compounds. The objective of our study was to investigate the cytotoxic and apoptotic effects and antioxidant activity of the newly synthesized pyrrole derivatives. METHOD A series of novel pyrroles and fused pyrroles (tetrahydroindoles, pyrrolopyrimidines, pyrrolopyridines and pyrrolotriazines) were synthesized and characterized using IR, 1H NMR, 13C NMR, MS and elemental analysis techniques. The antiproliferative activity of our synthesized compounds and their modulatory effect apoptotic pathway were investigated. The effect on cellular proliferation and viability was monitored by resazurin assay. Apoptotic effect was evaluated by caspase glo 3/7 assay. Synthesized compounds are then tested for their anticancer activities against three different cell lines representing three different tumor types, namely; the HepG-2 (Human hepatocellular liver carcinoma cell line), the human MCF-7 cell line (breast cancer) and the pancreatic resistant Panc-1 cells. RESULT Compounds Ia-e, IIe, and IXc, d showed a promising anti-cancer activity on all tested cell lines. Antioxidant and wound healing invasion assays were examined for promising anticancer candidate compounds.
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Affiliation(s)
- Samar S Fatahala
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Ain-Helwan, Helwan, Cairo. Egypt
| | - Mosaad S Mohamed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Ain-Helwan, Helwan, Cairo. Egypt
| | - Mahmoud Youns
- Biochemistry and Molecular Biology Department, Faculty of Pharmacy, Helwan University, Ain-Helwan, Helwan,Cairo. Egypt
| | - Rania H Abd-El Hameed
- Pharmaceutical organic chemistry department, Faculty of Pharmacy, Helwan University, Ain- Helwan, Helwan, Cairo. Egypt
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15
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Deng N, Hoyte A, Mansour YE, Mohamed MS, Fuchs JR, Engelman AN, Kvaratskhelia M, Levy R. Allosteric HIV-1 integrase inhibitors promote aberrant protein multimerization by directly mediating inter-subunit interactions: Structural and thermodynamic modeling studies. Protein Sci 2016; 25:1911-1917. [PMID: 27503276 PMCID: PMC5079246 DOI: 10.1002/pro.2997] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Accepted: 08/04/2016] [Indexed: 12/19/2022]
Abstract
Allosteric HIV-1 integrase (IN) inhibitors (ALLINIs) bind at the dimer interface of the IN catalytic core domain (CCD), and potently inhibit HIV-1 by promoting aberrant, higher-order IN multimerization. Little is known about the structural organization of the inhibitor-induced IN multimers and important questions regarding how ALLINIs promote aberrant IN multimerization remain to be answered. On the basis of physical chemistry principles and from our analysis of experimental information, we propose that inhibitor-induced multimerization is mediated by ALLINIs directly promoting inter-subunit interactions between the CCD dimer and a C-terminal domain (CTD) of another IN dimer. Guided by this hypothesis, we have built atomic models of inter-subunit interfaces in IN multimers by incorporating information from hydrogen-deuterium exchange (HDX) measurements to drive protein-protein docking. We have also developed a novel free energy simulation method to estimate the effects of ALLINI binding on the association of the CCD and CTD. Using this structural and thermodynamic modeling approach, we show that multimer inter-subunit interface models can account for several experimental observations about ALLINI-induced multimerization, including large differences in the potencies of various ALLINIs, the mechanisms of resistance mutations, and the crucial role of solvent exposed R-groups in the high potency of certain ALLINIs. Our study predicts that CTD residues Tyr226, Trp235 and Lys266 are involved in the aberrant multimer interfaces. The key finding of the study is that it suggests the possibility of ALLINIs facilitating inter-subunit interactions between an external CTD and the CCD-CCD dimer interface.
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Affiliation(s)
- Nanjie Deng
- Center for Biophysics & Computational Biology/ICMS, Department of Chemistry, Temple University, Philadelphia, Pennsylvania, 19122.
| | - Ashley Hoyte
- Center for Retrovirus Research and College of Pharmacy, The Ohio State University, Columbus, Ohio, 43210
| | - Yara E Mansour
- Division of Medicinal Chemistry & Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, Ohio, 43210
- Faculty of Pharmacy, Pharmaceutical Organic Chemistry Department, Helwan University, Cairo, Egypt
| | - Mosaad S Mohamed
- Faculty of Pharmacy, Pharmaceutical Organic Chemistry Department, Helwan University, Cairo, Egypt
| | - James R Fuchs
- Division of Medicinal Chemistry & Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, Ohio, 43210
| | - Alan N Engelman
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute and Department of Medicine, Harvard Medical School, Boston, Massachusetts, 02215
| | - Mamuka Kvaratskhelia
- Center for Retrovirus Research and College of Pharmacy, The Ohio State University, Columbus, Ohio, 43210
| | - Ronald Levy
- Center for Biophysics & Computational Biology/ICMS, Department of Chemistry, Temple University, Philadelphia, Pennsylvania, 19122
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16
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Patel PA, Kvaratskhelia N, Mansour Y, Antwi J, Feng L, Koneru P, Kobe MJ, Jena N, Shi G, Mohamed MS, Li C, Kessl JJ, Fuchs JR. Indole-based allosteric inhibitors of HIV-1 integrase. Bioorg Med Chem Lett 2016; 26:4748-4752. [PMID: 27568085 DOI: 10.1016/j.bmcl.2016.08.037] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 08/11/2016] [Accepted: 08/12/2016] [Indexed: 11/15/2022]
Abstract
Employing a scaffold hopping approach, a series of allosteric HIV-1 integrase (IN) inhibitors (ALLINIs) have been synthesized based on an indole scaffold. These compounds incorporate the key elements utilized in quinoline-based ALLINIs for binding to the IN dimer interface at the principal LEDGF/p75 binding pocket. The most potent of these compounds displayed good activity in the LEDGF/p75 dependent integration assay (IC50=4.5μM) and, as predicted based on the geometry of the five- versus six-membered ring, retained activity against the A128T IN mutant that confers resistance to many quinoline-based ALLINIs.
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Affiliation(s)
- Pratiq A Patel
- Division of Medicinal Chemistry & Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States; Department of Chemistry, The Ohio State University, Columbus, OH 43210, United States
| | - Nina Kvaratskhelia
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States
| | - Yara Mansour
- Division of Medicinal Chemistry & Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States; Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Janet Antwi
- Division of Medicinal Chemistry & Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States
| | - Lei Feng
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States
| | - Pratibha Koneru
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States
| | - Mathew J Kobe
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States
| | - Nivedita Jena
- Division of Medicinal Chemistry & Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States
| | - Guqin Shi
- Division of Medicinal Chemistry & Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States
| | - Mosaad S Mohamed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Chenglong Li
- Division of Medicinal Chemistry & Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States
| | - Jacques J Kessl
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States.
| | - James R Fuchs
- Division of Medicinal Chemistry & Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States.
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Mohamed MS, Sayed AI, Khedr MA, Soror SH. Design, synthesis, assessment, and molecular docking of novel pyrrolopyrimidine (7-deazapurine) derivatives as non-nucleoside hepatitis C virus NS5B polymerase inhibitors. Bioorg Med Chem 2016; 24:2146-57. [PMID: 27052365 DOI: 10.1016/j.bmc.2016.03.046] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [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: 01/12/2016] [Revised: 03/16/2016] [Accepted: 03/27/2016] [Indexed: 12/16/2022]
Abstract
Hepatitis C virus (HCV) infection is highly persistent and presents an unmet medical need requiring more effective treatment options. This has spurred intensive efforts to discover novel anti-HCV agents. The RNA-dependent RNA polymerase (RdRp), NS5B of HCV, constitutes a selective target for drug discovery due to its absence in human cells; also, it is the centerpiece for viral replication. Here, we synthesized novel pyrrole, pyrrolo[2,3-d]pyrimidine and pyrrolo[3,2-e][1,2,4]triazolo[4,3-c]pyrimidine derivatives. The non-toxic doses of these compounds on Huh 7.5 cell line were determined and their antiviral activity against HCVcc genotype 4a was examined. Compounds 7j, 7f, 5c, 12i and 12f showed significant anti HCV activity. The percent of reduction for the non-toxic doses of 7j, 7f, 5c, 12i and 12f were 90%, 76.7±5.8%, 73.3±5.8%, 70% and 63.3±5.8%, respectively. The activity of these compounds was interpreted by molecular docking against HCV NS5B polymerase enzyme.
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Affiliation(s)
- Mosaad S Mohamed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Ain Helwan, Cairo, Egypt
| | - Amira I Sayed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Ain Helwan, Cairo, Egypt
| | - Mohammed A Khedr
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Helwan University, Ain Helwan, Cairo, Egypt
| | - Sameh H Soror
- Biochemistry and Molecular Biology Department, Faculty of Pharmacy, Helwan University, Ain Helwan, University Campus, 11795 Cairo, Egypt; Center for Scientific Excellence 'Helwan Structural Biology Research (HSBR)', Cairo, Egypt.
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18
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Mahmoud SA, Mohamed MS, Abou Taleb NA, Nagamatsu T, Ali HI. Abstract LB-098: Antitumor studies: Design, synthesis, antitumor activity and molecular docking study of novel 2-deoxo-2-substituted-5-deazaalloxazines. Cancer Res 2015. [DOI: 10.1158/1538-7445.am2015-lb-098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Cancer is the major threat to the public health worldwide, thereby we have a considerable interest to get potential antitumor agents via computational design, synthesis, functional elucidation, and biological evaluation of different deazaalloxazine analogs. Many of these compounds revealed higher selectivities against different tumor cell lines.
In the study the structure activity relationships (SAR) of the proposed derivatives was investigated, by applying structure based drug design (SBDD) using most advanced molecular modeling tool programs, namely: AutoDock 4.2 and Accelrys Discovery studio 2.0. These computational approaches aim to increase the speed and efficiency in the drug discovery process. The reasonable drug candidates were subjected to the chemical synthesis and biological in vitro test against different tumor cell lines. The docking study of the synthesized and the rationally designed derivatives was carried out using PTKs as target enzymes which was early reported as a proposed pathway for inhibition of cancer. The main outcome of this study is the synthesis of novel 2-methylthio, 2-(substituted alkyl amino), 2-(heterocyclic substituted), 2-amino, 2,4-dioxo and 2-deoxo-5-deazaalloxazine derivatives. Their antitumor activities against human T-cell acute lymphoblastoid leukemia cell line (CCRF-HSB-2), human oral epidermoid carcinoma cell line (KB), human breast cancer cell line (MCF-7) and human cervical cancer cell line (Hela) have been investigated in vitro. Many compounds showed promising antitumor activities. Furthermore, AutoDock study has been done by binding of the 5-deazaalloxazine analogs into c-kit PTK (PDB code: 1t46), where a good correlation between their IC50 and AutoDock binding free energy was exhibited.
Citation Format: Sawsan A. Mahmoud, Mosaad S. Mohamed, Nageh A. Abou Taleb, Tomohisa Nagamatsu, Hamed I. Ali. Antitumor studies: Design, synthesis, antitumor activity and molecular docking study of novel 2-deoxo-2-substituted-5-deazaalloxazines. [abstract]. In: Proceedings of the 106th Annual Meeting of the American Association for Cancer Research; 2015 Apr 18-22; Philadelphia, PA. Philadelphia (PA): AACR; Cancer Res 2015;75(15 Suppl):Abstract nr LB-098. doi:10.1158/1538-7445.AM2015-LB-098
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Affiliation(s)
- Sawsan A. Mahmoud
- 1Department of Pediatrics, School of Medicine, Emory University, Atlanta, GA
| | - Mosaad S. Mohamed
- 2Department of Pharmaceutical Organic Chemistry, College of Pharmacy, Helwan University, Cairo, Egypt
| | - Nageh A. Abou Taleb
- 3Department of Pharmaceutical Chemistry, College of Pharmacy, Helwan University, Cairo, Egypt
| | - Tomohisa Nagamatsu
- 4Department of Medical Technology, Faculty of Health Science, Kumamoto Health Science University, Kumamoto, Japan
| | - Hamed I. Ali
- 5Irma Lerma Rangel College of Pharmacy, Texas A&M University-Health Science Center, Kingsville, TX
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El Khatib MM, Sakuma T, Tonne JM, Mohamed MS, Holditch SJ, Lu B, Kudva YC, Ikeda Y. β-Cell-targeted blockage of PD1 and CTLA4 pathways prevents development of autoimmune diabetes and acute allogeneic islets rejection. Gene Ther 2015; 22:430-8. [PMID: 25786871 DOI: 10.1038/gt.2015.18] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 01/07/2015] [Accepted: 02/12/2015] [Indexed: 12/21/2022]
Abstract
Protection of β cells from autoimmune destruction potentially cures type 1 diabetes mellitus (T1D). During antigen presentation, interactions between cytotoxic T-lymphocyte antigen-4 (CTLA4) and B7 molecules, or programmed death 1 (PD1) and its ligand PDL1, negatively regulate immune responses in a non-redundant manner. Here we employed β-cell-targeted adeno-associated virus serotype 8 (AAV8)-based vectors to overexpress an artificial PDL1-CTLA4Ig polyprotein or interleukin 10 (IL10). β-Cell-targeted expression of PDL1-CTLA4Ig or IL10 preserved β-cell mass and protected NOD mice from T1D development. When NOD mice were treated with vectors at early onset of hyperglycemia, PDL1-CTLA4Ig or IL10 alone failed to normalize the early onset of hyperglycemia. When drug-induced diabetic mice received major histocompatibility complex (MHC)-matched allo-islets, with or without pretreatment of the PDL1-CTLA4Ig-expressing vector, PDL1-CTLA4Ig-expressing islets were protected from rejection for at least 120 days. Similarly, transplantation of PDL1-CTLA4Ig-expressing MHC-matched islets into mice with established T1D resulted in protection of allo-islets from acute rejection, although islet grafts were eventually rejected. Thus the present study demonstrates the potent immuno-suppressive effects of β-cell-targeted PDL1-CTLA4Ig overexpression against T1D development and allo-islet rejection. The gene-based simultaneous inhibition of PD1 and CTLA4 pathways provides a unique strategy for immunosuppression-free tissue/organ transplantation, especially in the setting of no established autoimmunity.
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Affiliation(s)
- M M El Khatib
- Department of Molecular Medicine, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - T Sakuma
- Department of Molecular Medicine, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - J M Tonne
- Department of Molecular Medicine, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - M S Mohamed
- Department of Molecular Medicine, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - S J Holditch
- Department of Molecular Medicine, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - B Lu
- Department of Molecular Medicine, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Y C Kudva
- Division of Endocrinology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Y Ikeda
- Department of Molecular Medicine, Mayo Clinic College of Medicine, Rochester, MN, USA
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20
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Mohamed MS, Abd El-Hameed RH, Sayed AI, Soror SH. Novel antiviral compounds against gastroenteric viral infections. Arch Pharm (Weinheim) 2015; 348:194-205. [PMID: 25704120 DOI: 10.1002/ardp.201400387] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [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: 10/18/2014] [Revised: 12/24/2014] [Accepted: 01/09/2015] [Indexed: 11/07/2022]
Abstract
Viral gastroenteritis is a serious viral infection which affects a large number of individuals around the world, most of them being children. The infection may occur due to different viruses, for example, coxsackievirus, adenovirus, and rotavirus. There is no available cure for such infections, and the treatment mainly depends on hospitalization and administration of nutritional supports. A new antiviral agent against gastroenteritis viral infection will be a breakthrough in healthcare. Pyrrole and pyrrolopyrimidine derivatives are well known for their biological activity as antibacterial, antifungal, and anticancer agents. These compounds also proved to possess antiviral activity. Here, we synthesized novel pyrrole and pyrrolopyrimidine compounds and examined their antiviral activity. We synthesized several new pyrrole, pyrrolo[2,3-d]pyrimidine, and pyrrolo[3,2-e][1,2,4]triazolo[1,5-c]pyrimidine derivatives. The characterization of all synthesized compounds was based on microanalysis and spectral data. Moreover, we determined the non-toxic doses of these compounds on BGM, Hep-2, and MA-104 cells. We tested all the synthesized compounds for their antiviral activities against coxsackievirus B4, adenovirus type 7, and rotavirus Wa strain. Several compounds exhibited significant activities as antiviral agents.
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Affiliation(s)
- Mosaad S Mohamed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Ain Helwan, Helwan, Egypt
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Mohamed MS, Abu-Steit MH, Shalaby AM, Sherif AM. Evaluation of dry eye syndrome after LASIK and surface ablation: a comparative study. J Egypt Ophthalmol Soc 2015. [DOI: 10.4103/2090-0686.174681] [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: 11/04/2022] Open
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Abstract
The pyrrole derivatives 1a, b and 2a, b were used as precursors for the preparation of N-substituted pyrrole derivatives 3a, b-9a, b and pyrrolo[2,3-d]pyrimidines 13-16. Also, all the newly prepared products were tested for anti-inflammatory activity as analogues to fenamates, and some of them revealed moderate anti-inflammatory activity compared to the standard drug indomethacin.
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Affiliation(s)
- Mosaad S Mohamed
- Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
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Mohamed MS, Youns MM, Ahmed NM. Synthesis, antimicrobial, antioxidant activities of novel 6-aryl-5-cyano thiouracil derivatives. Eur J Med Chem 2013; 69:591-600. [PMID: 24095752 DOI: 10.1016/j.ejmech.2013.08.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [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: 03/06/2013] [Revised: 08/17/2013] [Accepted: 08/21/2013] [Indexed: 11/29/2022]
Abstract
A series of 6-aryl-5-cyano thiouracil derivatives (2a-c to 11a-c) was synthesized from 6-aryl-4-hydrazino-2-thioxo-1,2-dihydropyrimidine-5-carbonitriles (1a-c). The products were characterized by analytical and spectral data (IR, (1)H NMR, (13)C NMR and mass spectra). All compounds were screened for their in-vitro antibacterial and antifungal activities. Compounds 7a, 7g and 9a-c showed pronounced antimicrobial activity than standards. Some of the newly synthesized compounds were evaluated for antioxidant activity. Compounds 1c, 5c and 8c displayed promising free radical scavenging activity and found to be more potent than standard, ascorbic acid (vitamin C).
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Affiliation(s)
- M S Mohamed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Ein Helwan, Cairo 11795, Egypt.
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Radwan MA, Mohamed MS. Imidacloprid induced alterations in enzyme activities and energy reserves of the land snail, Helix aspersa. Ecotoxicol Environ Saf 2013; 95:91-97. [PMID: 23756058 DOI: 10.1016/j.ecoenv.2013.05.019] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 05/14/2013] [Accepted: 05/16/2013] [Indexed: 05/27/2023]
Abstract
The in vivo sublethal toxic effects (0.2 and 0.6 LD50) of topically applied imidacloprid on biochemical biomarkers in the land snail, Helix aspersa was examined. Biochemical perturbations were assessed by measuring the three enzymatic (Acetylcholinesterase, AChE; catalase, CAT and glutathione-S-transferase, GST) activities and three energy reserves (protein, glycogen and lipids) in the snails. Snail samples were taken from each sublethal dose and control groups at 1, 3 and 7 days after treatment. The results revealed that there were overall decrease in AChE activity as well as depletion of lipids and glycogen contents in the imidacloprid-treated snails compared to control groups. The CAT and GST activities of treated snails with the sublethal doses of imidacloprid were significantly higher than those of untreated controls along the three times of exposure. Moreover, an increase in the level of total proteins was observed in animals treated with 0.6 LD50 imidacloprid compared to control groups. The alterations in all tested biochemical perturbations were most pronounced with the 0.6 LD50 than 0.2 LD50. This study suggests that alterations of the enzyme activities and energy reserves in this species that could be useful as biomarkers of imidacloprid exposure in the evaluation of terrestrial impacts of this insecticide.
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Affiliation(s)
- M A Radwan
- Department of Pesticide Chemistry and Technology, Faculty of Agriculture (El-Shatby), Alexandria University, Alexandria 21545, Egypt.
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Fong SW, Suhairi I, Mohamed MS, Few LL, Too WCS, Khoo BY, Yussof Z, Rahman ARA, Yvonne-Tee GB. [Identification of endogenous control genes for gene expression studies in peripheral blood of patients with coronary artery disease]. Mol Biol (Mosk) 2013; 47:218-23. [PMID: 23808154 DOI: 10.7868/s0026898413020067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The selection of stable endogenous control genes is critical for normalization of quantitative real-time PCR (qPCR) data. In this study, we aimed to identify a suitable set of control genes to be used as endogenous references for gene expression evaluation in human peripheral blood samples among coronary artery disease patients. The expression levels of 12 endogenous control genes procured from TATAA Biocenter (Goteborg, Sweden) were measured in five acute coronary syndrome patients and five chronic stable angina patients. Gene expression stability was analyzed using two different software applications i.e geNorm and NormFinder. Results suggested that beta-glucuronidase is the most stable endogenous control, followed by hypoxanthine-guanine phosphoribosyltransferase. The NormFinder analysis further confirmed that beta-glucuronidase and hypoxanthine-guanine phosphoribosyltransferase were on the first rank order with the most stable expression among endogenous control genes analyzed and 60S acidic ribosomal protein P0. Besides this, the expression levels of 18S rRNA were revealed to be highly variable between coronary heart disease patients. We thus recommend the use of beta-glucuronidase and hypoxanthine-guanine phosphoribosyltransferase as reference genes for accurate normalization of relative quantities of gene expression levels in coronary artery disease patients using qPCR. Also the use of 18S rRNA as a control gene should be avoided.
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Awad SM, Fathalla OA, Wietrzyk J, Milczarek M, Soliman AM, Mohamed MS. Synthesis of new pyrimidine derivatives and their antiproliferative activity against selected human cancer cell lines. Res Chem Intermed 2013. [DOI: 10.1007/s11164-013-1312-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Hussein WM, Fatahala SS, Mohamed ZM, McGeary RP, Schenk G, Ollis DL, Mohamed MS. Synthesis and Kinetic Testing of Tetrahydropyrimidine-2-thione and Pyrrole Derivatives as Inhibitors of the Metallo-β-lactamase fromKlebsiella pneumoniaandPseudomonas aeruginosa. Chem Biol Drug Des 2012; 80:500-15. [DOI: 10.1111/j.1747-0285.2012.01440.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Mohamed MS, Hussein WM, McGeary RP, Vella P, Schenk G, Abd El-hameed RH. ChemInform Abstract: Synthesis and Kinetic Testing of New Inhibitors for a Metallo-β-lactamase from Klebsiella pneumonia and Pseudomonas aeruginosa. ChemInform 2012; 43:no-no. [DOI: 10.1002/chin.201215167] [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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Mohamed MS, Kamel R, Fathallah SS. Synthesis of New Pyrroles of Potential Anti-Inflammatory Activity. Arch Pharm (Weinheim) 2011; 344:830-9. [DOI: 10.1002/ardp.201100056] [Citation(s) in RCA: 22] [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] [Received: 02/14/2011] [Revised: 06/08/2011] [Accepted: 06/20/2011] [Indexed: 11/12/2022]
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Mohamed MS, Kamel MM, Kassem EMM, Abotaleb N, Khedr M, Ahmed MF. Synthesis, biological evaluation and molecular docking of quinazoline-4(1H)-one derivatives as anti-inflammatory and analgesic agents. Acta Pol Pharm 2011; 68:665-675. [PMID: 21928711] [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
Two series of 2-phenyl-4(3H) quinazolinone derivatives have been synthesized. Most of the tested quinazolinone derivatives showed considerable potent anti-inflammatory and analgesic activity of superior GIT safety profile in experimental rats in comparing to indomethacin as reference drug. Compounds VIa, VIb were the most potent anti-inflammatory in experimental rats in comparing to indomethacin as reference drug. Docking study into COX-2 has been made for derivatives of anti-inflammatory activity.
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Mohamed MS, Kamel R, Fatahala SS. New condensed pyrroles of potential biological interest. Eur J Med Chem 2011; 46:3022-9. [DOI: 10.1016/j.ejmech.2011.04.034] [Citation(s) in RCA: 22] [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] [Received: 11/20/2010] [Revised: 04/05/2011] [Accepted: 04/12/2011] [Indexed: 10/18/2022]
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Mohamed MS, Kamel MM, Kassem EMM, Abotaleb N, El-moez SIA, Ahmed MF. ChemInform Abstract: Novel 6,8-Dibromo-4(3H)quinazolinone Derivatives of Antibacterial and Antifungal Activities. ChemInform 2010; 41:no-no. [DOI: 10.1002/chin.201047155] [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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Mohamed MS, Kamel R, Fatahala SS. WITHDRAWN: Synthesis and biological evaluation of some novel Pyrrolo[2, 3-d]pyrimidine derivatives. Bioorg Med Chem Lett 2010:S0960-894X(10)00940-6. [PMID: 20696577 DOI: 10.1016/j.bmcl.2010.06.153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2010] [Accepted: 06/24/2010] [Indexed: 11/22/2022]
Abstract
This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at http://www.elsevier.com/locate/withdrawalpolicy.
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Mohamed MS, Kamel MM, Kassem EMM, Abotaleb N, Abd El-Moez SI, Ahmed MF. Novel 6,8-dibromo-4(3H)quinazolinone derivatives of anti-bacterial and anti-fungal activities. Eur J Med Chem 2010; 45:3311-9. [PMID: 20452707 DOI: 10.1016/j.ejmech.2010.04.014] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2010] [Revised: 04/11/2010] [Accepted: 04/13/2010] [Indexed: 11/19/2022]
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El-Mahdy TS, Abdalla S, El-Domany R, Mohamed MS, Ross JI, Snelling AM. Detection of a new erm(X)-mediated antibiotic resistance in Egyptian cutaneous propionibacteria. Anaerobe 2010; 16:376-9. [PMID: 20541615 DOI: 10.1016/j.anaerobe.2010.06.003] [Citation(s) in RCA: 18] [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] [Received: 04/09/2010] [Revised: 05/30/2010] [Accepted: 06/03/2010] [Indexed: 11/28/2022]
Abstract
A total of 107 antibiotic-resistant propionibacteria were isolated from the face of 102 Egyptian acne patients, dermatology staff and controls. Erythromycin-clindamycin-resistant propionibacteria were chosen to detect erm(X) gene and it was detected in 29 of 107 (27%) strains. However, just 7 strains had IS1249I, 3 of them had also Tn5432. The erm(X) gene which is not carried on Tn5432 confers inducible resistance to telithromycin by erythromycin or clindamycin. The DNA sequences of the PCR amplification products of this new erm(X)-mediated antibiotic resistance showed >99% identity to the erm(X) gene isolated from a Corynebacterium jeikeium. Southern blotting analysis of the erm(X)-specific probe shows that there were two copies of this resistance gene integrated within the chromosomal DNA. This is the first report of erm(X) being carried by Propionibacterium acnes outside Europe. Whilst the gene is associated with Tn5432 in some strains, the data suggests other genetic element carrying erm(X). The high carriage of erm(X) may affect the efficacy of clindamycin and macrolides for acne treatment in Egypt.
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Affiliation(s)
- T S El-Mahdy
- Department of Biomedical Sciences, University of Bradford, UK.
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Mohamed MS, Awad SM, Sayed AI. Synthesis of certain pyrimidine derivatives as antimicrobial agents and anti-inflammatory agents. Molecules 2010; 15:1882-90. [PMID: 20336018 PMCID: PMC6257238 DOI: 10.3390/molecules15031882] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2010] [Revised: 03/11/2010] [Accepted: 03/12/2010] [Indexed: 11/16/2022] Open
Abstract
A variety of novel bicyclic and tricyclic pyrimidine derivatives was obtained via reaction of 6-amino-2-thioxo-1H-pyrimidine-4-one (1) with a different reagents. The antimicrobial and anti-inflammatory activities of some of the synthesized compounds were tested.
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Affiliation(s)
| | | | - Amira Ibrahim Sayed
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Helwan University, Helwan, Egypt
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Mohamed MS, Kamel MM, Kassem EMM, Abotaleb N, Nofal SM, Ahmed MF. Novel 3-(p-substituted phenyl)-6-bromo-4(3H)-quinazolinone derivatives of promising antiinflammatory and analgesic properties. Acta Pol Pharm 2009; 66:487-500. [PMID: 19894645] [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: 05/28/2023]
Abstract
A new series of the title compounds incorporated into diverse N and O heterocyclic moieties of pharmacoavailability as anti-inflammatory or analgesic agents, were synthesized starting with 6-bromo-2-phenyl-4H-3,1-benzoxazin-4-one (I) by its fusion with p-aminoacetophenone to give the intermediate compound, 6-bromo-2-phenyl-3-(4-acetylphenyl)-4(3H)quinazolinone (II). The one pot reaction of II with the appropriate aromatic aldehydes and anhyd. ammonium acetate in the presence of either ethyl cyanoacetate or malononitrile afforded the corresponding 2(1H)-pyridone derivatives III or 2(1H)- iminopyridine derivatives IV, respectively, while its reaction with malononitrile and aromatic aldehydes in piperdine gave the 2-aminopyrans V. Also reaction of the acetyl derivative II with different aromatic aldehydes afforded the corresponding 1,3-propen-1-one derivatives VI which underwent cyclization with hydrazines to give the corresponding pyrazoline derivatives VII and with urea or thiourea to give the pyrimidones or pyrimidinethiones VIII. Some representative examples of the new compounds showed promising anti-inflammatory and analgesic activities in experimental animals.
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Affiliation(s)
- Mosaad S Mohamed
- Faculty of Pharmacy, Helwan University and National Research Centre, Dokki Cairo, Egypt.
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Abstract
OBJECTIVES To identify any seasonal variation in the pattern of referrals to the Surgical Assessment Unit (SAU). METHODS Admission data to the SAU were collected prospectively during two audit periods of 13 weeks each (winter 2004/2005 and summer 2005). The data were analysed comparing numbers of admissions over the two audit periods and variations in the presenting complaint. RESULTS There were a significantly greater number of referrals to the SAU in the summer compared with winter (999 vs. 849, p = 0.026). Whilst there were no significant differences in the sex distribution of patients presenting with general surgical symptoms, a significantly greater proportion of male patients presented with urological symptoms. Additionally, a significantly greater proportion of patients presented in the summer with scrotal/testicular symptoms compared with the winter (13.9% vs. 8.5%, p = 0.02). There was no significant difference between the two periods in terms of other diagnoses. In both study periods, the SAU was busy during weekdays compared with weekends. Whilst most patients arrived in the SAU between 9 am and midnight a smaller but not insignificant number arrived outside of these hours. CONCLUSIONS Summer compared with winter was a busy period for the SAU. This may be important in managing emergency surgical admissions. A significantly greater proportion of patients presented with scrotal/testicular symptoms during the summer, the reasons for which are unclear. The SAU diverts workload away from busy Accident & Emergency departments.
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Affiliation(s)
- S T Ward
- Medway Maritime Hospital, Gillingham, Kent, UK
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El Galy MM, El Mezayn AM, Said AF, El Mowafy AA, Mohamed MS. Distribution and environmental impacts of some radionuclides in sedimentary rocks at Wadi Naseib area, southwest Sinai, Egypt. J Environ Radioact 2008; 99:1075-82. [PMID: 18243438 DOI: 10.1016/j.jenvrad.2007.12.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2007] [Revised: 12/06/2007] [Accepted: 12/07/2007] [Indexed: 05/14/2023]
Abstract
The present study examines the natural radioactivity in some sedimentary rocks and their associated environmental impacts at Wadi Naseib area. Exposure rate (ER), dose rate (DR), radium equivalent activity (Ra(eq)), external hazard index (H(ex)), internal hazard index (H(in)) and radioactivity level index (I(gamma)) were calculated. Wadi Naseib area is covered with sedimentary rocks of early to late Paleozoic age. These rocks are classified into two types: mineralized and non-mineralized sediments. The radiometric investigations revealed that uranium and thorium contents reached up to 710 and 520 ppm, respectively, in the mineralized rocks. This was attributed to the presence of some secondary uranium minerals. All sediments had low values of eTh and K content. The exposure and dose rates exceeded public permissible values in the mineralized sediments. Exposure and dose rates were within the safety range for workers and the public in the non-mineralized sediments. The expected environmental impacts may be low due to the limited occurrence of U-mineralization and corresponding areas for radiation exposure. Some precautions and recommendations were suggested to avoid any possible environmental impacts from areas and/or raw materials of high intensity of natural radiation sources.
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Affiliation(s)
- M M El Galy
- Nuclear Materials Authority, Research Division, PO Box 530 Maadi, Cairo, Egypt
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Abstract
Pyrrolo[2,3-d]pyrimidine and tetrazolopyrimidine derivatives 2a, b-5a, b were prepared. Also, acyclic and cyclic C-nucleosides 7a, b-12a, b were prepared by treating compound 6 with some aldoses. All prepared products were tested for antiviral activity against hepatitis-A virus (HAV, MBB-cell culture adapted strain) and herpes simplex virus type-1 (HSV-1). Plaque reduction infectivity assay was used to determine virus count reduction as a result of treatment with tested compounds. Compound 2a showed the highest effect on HAV, while compound 11b showed the highest effect on the HSV-1 virus.
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Affiliation(s)
- Aymn E Rashad
- Photochemistry Department, National Research Centre, Dokki, Ciro 1258943, Cairo, Egypt.
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Abstract
2-Thiouracil-5-sulphonic acid N-(4-acetylphenyl) Amide (1) was reacted with a series of aromatic aldehydes giving chalcones 2 (Claisen-Schemidt reaction), some of these chalcones were reacted with urea and thiourea giving pyrimidine-2-one and pyrimidine-2 thione derivatives respectively of the type 3a,b and 4a,b. In addition many chalcones were reacted with hydroxylamine hydrochloride giving isoxazoline derivatives 5a,b. They could also reacted with phenylhydrazine to give pyrazoline derivatives 6a,b, chalcones also were reacted withethylcyano acetate and/or malononitryl in pyridine giving pyran derivatives 7a,c and 8a,c. In another pathway chalcones were epoxidised by H2O2 giving epoxides 9a,c which in turn were reacted with phenylhydrazine giving 4-hydroxypyrazoline derivatives 10a,c. In another reaction chalcones were reacted with ethylcyanoacetate in presence of amm.acetate giving pyridone derivatives 11a,d which could be prepared also in exellent yield from compound 1 by its reaction with certain aromatic aldehydes and ethylcyanoacetate in presence of ammonium acetate. Finally, compound 1 was reacted with semicarbazide giving semicarbazone intermediate 12 which in turn was reacted with thionyl chloride giving thiadiazole derivative 13. The biological effects of some of the new synthesized compounds were also investigated.
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Affiliation(s)
- O A Fathalla
- Department of Medicinal Chemistry, National Research Centre, Dokki, Cairo, Egypt.
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Abstract
A special unit was set up in an associate teaching hospital to provide a fast-track route for the assessment of acute adult surgical and urological referrals. During an audit period of eight weeks, this surgical assessment unit had 550 referrals, of which 196 (36%) came via the accident and emergency (A&E) department; the other 354 came directly from general practitioners or other hospital departments. Mondays, Tuesdays and Fridays were the busiest days of the week; 57% of all patients arrived between 8 am and 5 pm. 68% were seen by a doctor within 1 hour of their arrival. 68% were either discharged or admitted to the main surgical wards within 4 hours. The study showed that, over the course of a year, the surgical assessment unit might divert some 2301 patients away from the A&E department. To achieve this total it would need to be open and appropriately staffed 24 hours a day. Such a unit offers a strategy for limiting the A&E workload and streamlining the assessment of patients with surgical and urological emergencies.
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Affiliation(s)
- M S Mohamed
- Directorate of Surgery & Anaesthetics, Medway Maritime Hospital, Windmill Road, Gillingham ME7 5NY, UK
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Mohamed MS, Mufti GR. The Surgical Assessment Unit—Effective Strategy for Improvement of the Emergency Surgical Pathway? Med Chir Trans 2005; 98:14-7. [PMID: 15632229 PMCID: PMC1079231 DOI: 10.1177/014107680509800105] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A special unit was set up in an associate teaching hospital to provide a fast-track route for the assessment of acute adult surgical and urological referrals. During an audit period of eight weeks, this surgical assessment unit had 550 referrals, of which 196 (36%) came via the accident and emergency (A&E) department; the other 354 came directly from general practitioners or other hospital departments. Mondays, Tuesdays and Fridays were the busiest days of the week; 57% of all patients arrived between 8 am and 5 pm. 68% were seen by a doctor within 1 hour of their arrival. 68% were either discharged or admitted to the main surgical wards within 4 hours. The study showed that, over the course of a year, the surgical assessment unit might divert some 2301 patients away from the A&E department. To achieve this total it would need to be open and appropriately staffed 24 hours a day. Such a unit offers a strategy for limiting the A&E workload and streamlining the assessment of patients with surgical and urological emergencies.
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Affiliation(s)
- M S Mohamed
- Directorate of Surgery & Anaesthetics, Medway Maritime Hospital, Windmill Road, Gillingham ME7 5NY, UK
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Abstract
2-Thiouracil-5-sulfonylchloride 1 reacted with a series of aromatic and heterocyclic amines to give 2a-j. The same compound 1 was reacted with a series of sulphonamides giving different sulphonamides of type 3a-e. On the other hand compound 1 was allowed to react with p-aminoacetophenone givining compound 4 which in turn was allowed to react with derivatives of alkyl thiosemicarbazides to give thiosemicarbazones of type 5a-e, also compound 4 was monobrominated to give compound 6 which in turn was reacted thiosemicarbazones of some aldehydes to give the corresponding thiazole derivatives 7a-f. In the same time compound 4 was reacted with a series of aromatic and heterocyclic aldehydes givining chalcones 8a-g (Claisen-Schemidt reaction). Also compound 4 was allowed to react with a series of aromatic and heterocyclic aldehydes, ethyl cyano acetate and/or malononitrile, and ammonium acetate giving pyridine derivatives 9a-d and 10a-e respectively. The biological effects of some of the new synthesized compounds was also investigated.
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Affiliation(s)
- A Fathalla
- Department of Medicinal Chemistry, National Research Centre, Dokki, Cairo, Egypt.
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Mohamed MS, Bates T. Predictive clinical and laboratory factors in the diagnosis of temporal arteritis. Ann R Coll Surg Engl 2002; 84:7-9. [PMID: 11890631 PMCID: PMC2503756] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Abstract
Surgeons are frequently called upon to perform temporal artery biopsy in patients suspected of having temporal arteritis. In this study, we have attempted to identify clinical and laboratory features that may predict the results of temporal artery biopsy for the diagnosis of temporal arteritis. The medical records of patients undergoing temporal artery biopsy over a 10-year period in one hospital were reviewed. Details of presenting features were recorded and comparisons made between biopsy-positive and biopsy-negative patients. Of 59 patients who underwent temporal artery biopsy, the records of 51 patients were located. Of these, 17 patients had positive biopsy specimens and 33 had negative biopsies. In one patient, no temporal artery was found in the biopsy specimen. In the biopsy-positive patients, 69% had an erythrocyte sedimentation rate of greater than 50 mm/h compared to 31% of biopsy negative patients (P = 0.03). With regard to the other clinical and laboratory parameters that were evaluated, no statistically significant differences were found between biopsy-positive and biopsy-negative patients.
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Affiliation(s)
- M S Mohamed
- Department of Surgery, William Harvey Hospital, Ashford, Kent, UK
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Mohamed MS, Mukherjee M, Kakkar VV. Thrombogenicity of heparin and non-heparin bound arterial prostheses: an in vitro evaluation. J R Coll Surg Edinb 1998; 43:155-7. [PMID: 9654873] [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: 02/08/2023]
Abstract
The effect on graft thrombogenicity of binding heparin to the luminal surface of prosthetic arterial grafts was investigated. Venous blood was obtained from healthy volunteers and exposed for 30 minutes to tubular segments of standard knitted dacron, polytetrafluoroethylene (PTFE) and a recently introduced heparin-bound knitted dacron graft. After this exposure the fibrinogen level of each sample was measured. The median (range) fibrinogen levels (expressed as a percentage of that in unexposed blood samples) were: standard dacron 3.5% (0-5.4%); PTFE 95.5% (0-121.1%); and heparin-bound dacron 79.8% (3.8-109.6%). Fibrinogen levels in the standard dacron group were significantly less than that of the PTFE and heparin-bound dacron groups (P < 0.05). No significant difference was found between the fibrinogen levels of the PTFE and heparin-bound dacron groups (P = 0.35). These findings suggest that heparin binding significantly reduces fibrinogen consumption and hence may reduce graft thrombogenicity.
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Abstract
BACKGROUND Patients undergoing major abdominal surgery are at risk of both bleeding and thrombotic complications and usually receive heparin thromboprophylaxis. PATIENTS AND METHODS Risk factors for perioperative bleeding were examined in 3,809 patients in a double-blind, randomized trial investigating heparin thromboprophylaxis. The risk factors were modeled by logistic regression, and a risk score was calculated using the significant factors in the model. RESULTS Bleeding was associated with the following factors in the model, given as adjusted odds ratios (ORa [95% confidence interval]): male sex (ORa 1.68 [1.21 to 2.34] P = 0.003), malignancy (ORa 1.69 [1.21 to 2.34] P = 0.008), gynecological surgery (ORa 1.62 [1.12 to 2.35] P = 0.011), and complex surgery (ORa 2.7 [2.02 to 3.62] P < 0.001). The risk of excessive bleeding for 0, 1, 2, and 3 risk factors was 2%, 6%, 11%, and 21%, respectively. CONCLUSIONS The recognition of patients with these risk factors associated with perioperative bleeding should result in increased vigilance and may lead to modification of surgical and medical therapy.
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Affiliation(s)
- A T Cohen
- Department of Medicine, King's College School of Medicine and Dentistry, London, United Kingdom
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Abstract
Perioperative thromboembolism can be effectively prevented by low-dose heparin. However, its clinical benefit is limited, due to the risk of bleeding, the need for multiple daily doses, infrequent disorders of platelet function and other potential side effects. Low molecular weight heparin (LMWH) was developed with the aim that the antithrombotic efficacy of heparin could be maintained, while the risk of bleeding and other side effects would be reduced. Prior to recent studies, the anticipated clinical benefit of LMWH remained a controversial issue. We have reviewed the clinical pharmacology and the results of several prospective trials using reviparin a LMWH which has been compared with unfractionated heparin (UFH) and another LMWH. The efficacy and safety of reviparin was examined in the prevention of venous thromboembolism in high risk patients undergoing elective major abdominal and hip surgery. The results of these clinical trials show that reviparin is as effective as UFH in preventing venous thromboembolism whilst having a lower incidence of bleeding complications. Of major significance was the finding that a very low dose of reviparin, namely 1750 anti-Xa IU once daily, was found to be as effective as UFH in preventing deep vein thrombosis whilst having a significantly lower incidence of bleeding complications in patients undergoing major abdominal surgery. Reviparin has also been shown to be effective and safe as enoxaprin in patients undergoing elective hip surgery. Further clinical trials are required to test different dosage regimens as a thromboprophylactic agent in high risk patients. It is possible that reviparin and other LMWHs with similar pharmacological properties may have an important clinical benefit over earlier compounds. However, this needs to be assessed in large scale, double-blind, randomised clinical trials.
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Affiliation(s)
- V V Kakkar
- Thrombosis Research Institute, London, UK
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Mohamed MS. An epidemiological study on consanguineous marriage among urban population in Alexandria. J Egypt Public Health Assoc 1995; 70:293-305. [PMID: 17214159] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The study was carried out using a cross-sectional approach, involving interviews with 500 households randomly selected from three urban areas in Alexandria (Bab Sharki, El Gomrok and Karmouz). A questionnaire interview was conducted with married females in these households to determine prevalence of consanguineous marriages and to study knowledge of married females about causes and effects of consanguineous marriages. Prevalence of consanguineous marriages among 500 married females was 22.8% with the highest frequency among marriage between first cousins (15.8%). Average inbreeding coefficient up to the marriage between second cousins equals to 0.01172. The linear trend of consanguineous marriages throughout the last 50 years was statistically significant. Age at marriage was younger in consanguineous marriages than non consanguineous marriages. Longstanding familiarity and sharing same traditions and customs with male relatives were the main causes of consanguineous marriages. The majority of the studied females (42.2%) reported that consanguineous marriage is harmful while 29.6% reported that it has no effect on offsprings.
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Affiliation(s)
- M S Mohamed
- Epidemiology Department, High Institute of Public Health, Alexandria
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Azab ME, Mohamed NH, Salem SA, Safar EH, Bebars MA, Sabry NM, Mohamed MS. Parasitic infections associated with malignancy and leprosy. J Egypt Soc Parasitol 1992; 22:59-70. [PMID: 1578180] [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: 12/27/2022]
Abstract
Results of parasitic infections, as revealed by urine and stool examination was significant (P less than 0.05) in 43.3% of patients suffering from different malignant diseases and non significant (P greater than 0.05) in 29.3% of leprosy patients compared to 22% in control subjects. The most prevalent parasites were E. histolytica and G. lamblia. Cryptosporidium occysts were not detected. By stool examination and culture, S. stercoralis larvae were detected only in the malignancy group. The most common parasites occurring concomitantly were A. duodenale and S. stercoralis. By the IFAT, strongyloidiasis gave significantly higher positive results in the malignancy group than in the leprosy and control groups. IFAT for toxocariasis, showed highly significant positivity in the leprosy group and significantly positivity in the malignancy group. For toxoplasmosis, it showed highly significant positive results in both leprosy and malignancy groups. Eosinophilia was significantly more prominent among malignancy patients and insignificant among those with leprosy. Parasitic infection detected by urine and stool examination among patients with eosinophilia was found in 76% of the malignancy patients and in 66.7% of the leprosy patients.
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Affiliation(s)
- M E Azab
- Departments of Parasitology, Faculty of Medicine, Ain Shams University, Cairo
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