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Hegazy A, Soltane R, Alasiri A, Mostafa I, Metwaly AM, Eissa IH, Mahmoud SH, Allayeh AK, Shama NMA, Khalil AA, Barre RS, El-Shazly AM, Ali MA, Martinez-Sobrido L, Mostafa A. Anti-rheumatic colchicine phytochemical exhibits potent antiviral activities against avian and seasonal Influenza A viruses (IAVs) via targeting different stages of IAV replication cycle. BMC Complement Med Ther 2024; 24:49. [PMID: 38254071 PMCID: PMC10804494 DOI: 10.1186/s12906-023-04303-2] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 12/10/2023] [Indexed: 01/24/2024] Open
Abstract
BACKGROUND The continuous evolution of drug-resistant influenza viruses highlights the necessity for repurposing naturally-derived and safe phytochemicals with anti-influenza activity as novel broad-spectrum anti-influenza medications. METHODS In this study, nitrogenous alkaloids were tested for their viral inhibitory activity against influenza A/H1N1 and A/H5N1 viruses. The cytotoxicity of tested alkaloids on MDCK showed a high safety range (CC50 > 200 µg/ml), permitting the screening for their anti-influenza potential. RESULTS Herein, atropine sulphate, pilocarpine hydrochloride and colchicine displayed anti-H5N1 activities with IC50 values of 2.300, 0.210 and 0.111 µg/ml, respectively. Validation of the IC50 values was further depicted by testing the three highly effective alkaloids, based on their potent IC50 values against seasonal influenza A/H1N1 virus, showing comparable IC50 values of 0.204, 0.637 and 0.326 µg/ml, respectively. Further investigation suggests that colchicine could suppress viral infection by primarily interfering with IAV replication and inhibiting viral adsorption, while atropine sulphate and pilocarpine hydrochloride could directly affect the virus in a cell-free virucidal effect. Interestingly, the in silico molecular docking studies suggest the abilities of atropine, pilocarpine, and colchicine to bind correctly inside the active sites of the neuraminidases of both influenza A/H1N1 and A/H5N1 viruses. The three alkaloids exhibited good binding energies as well as excellent binding modes that were similar to the co-crystallized ligands. On the other hand, consistent with in vitro results, only colchicine could bind correctly against the M2-proton channel of influenza A viruses (IAVs). This might explicate the in vitro antiviral activity of colchicine at the replication stage of the virus replication cycle. CONCLUSION This study highlighted the anti-influenza efficacy of biologically active alkaloids including colchicine. Therefore, these alkaloids should be further characterized in vivo (preclinical and clinical studies) to be developed as anti-IAV agents.
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Affiliation(s)
- Akram Hegazy
- Department of Agricultural Microbiology, Faculty of Agriculture, Cairo University, Giza, 12613, Giza District, Egypt
| | - Raya Soltane
- Department of Biology, Adham University College, Umm Al-Qura University, 21955, Makkah, Saudi Arabia
| | - Ahlam Alasiri
- Department of Biology, Adham University College, Umm Al-Qura University, 21955, Makkah, Saudi Arabia
| | - Islam Mostafa
- Department of Pharmacognosy, Faculty of Pharmacy, Zagazig University, Zagazig, 44519, Egypt
| | - Ahmed M Metwaly
- Pharmacognosy and Medicinal Plants Department, Faculty of Pharmacy (Boys), Al-Azhar University, Cairo, Egypt
- Biopharmaceutical Products Research Department, Genetic Engineering and Biotechnology Research Institute, City of Scientific Research and Technological Applications (SRTA-City), Alexandria, 21934, Egypt
| | - Ibrahim H Eissa
- Pharmaceutical Medicinal Chemistry & Drug Design Department, Faculty of Pharmacy (Boys), Al-Azhar University, Cairo, 11884, Egypt
| | - Sara H Mahmoud
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza, 12622, Egypt
| | - Abdou Kamal Allayeh
- Virology Lab 176, Water Pollution Research Department, Environment and Climate Change Institute, National Research Centre, Dokki, 12622, Giza, Egypt
| | - Noura M Abo Shama
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza, 12622, Egypt
| | - Ahmed A Khalil
- Agriculture Research Center (ARC), Veterinary Sera and Vaccines Research Institute (VSVRI), Cairo, 11435, Egypt
| | - Ramya S Barre
- Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Assem Mohamed El-Shazly
- Department of Pharmacognosy, Faculty of Pharmacy, Zagazig University, Zagazig, 44519, Egypt
- Faculty of Pharmacy, El Saleheya El Gadida University, El Saleheya El Gadida , Sharkia, 44813, Egypt
| | - Mohamed A Ali
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza, 12622, Egypt
| | | | - Ahmed Mostafa
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza, 12622, Egypt.
- Texas Biomedical Research Institute, San Antonio, TX, USA.
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Alasiri A, Soltane R, Hegazy A, Khalil AM, Mahmoud SH, Khalil AA, Martinez-Sobrido L, Mostafa A. Vaccination and Antiviral Treatment against Avian Influenza H5Nx Viruses: A Harbinger of Virus Control or Evolution. Vaccines (Basel) 2023; 11:1628. [PMID: 38005960 PMCID: PMC10675773 DOI: 10.3390/vaccines11111628] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 10/11/2023] [Accepted: 10/20/2023] [Indexed: 11/26/2023] Open
Abstract
Despite the panzootic nature of emergent highly pathogenic avian influenza H5Nx viruses in wild migratory birds and domestic poultry, only a limited number of human infections with H5Nx viruses have been identified since its emergence in 1996. Few countries with endemic avian influenza viruses (AIVs) have implemented vaccination as a control strategy, while most of the countries have adopted a culling strategy for the infected flocks. To date, China and Egypt are the two major sites where vaccination has been adopted to control avian influenza H5Nx infections, especially with the widespread circulation of clade 2.3.4.4b H5N1 viruses. This virus is currently circulating among birds and poultry, with occasional spillovers to mammals, including humans. Herein, we will discuss the history of AIVs in Egypt as one of the hotspots for infections and the improper implementation of prophylactic and therapeutic control strategies, leading to continuous flock outbreaks with remarkable virus evolution scenarios. Along with current pre-pandemic preparedness efforts, comprehensive surveillance of H5Nx viruses in wild birds, domestic poultry, and mammals, including humans, in endemic areas is critical to explore the public health risk of the newly emerging immune-evasive or drug-resistant H5Nx variants.
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Affiliation(s)
- Ahlam Alasiri
- Department of Basic Sciences, Adham University College, Umm Al-Qura University, Makkah 21955, Saudi Arabia; (A.A.); (R.S.)
| | - Raya Soltane
- Department of Basic Sciences, Adham University College, Umm Al-Qura University, Makkah 21955, Saudi Arabia; (A.A.); (R.S.)
| | - Akram Hegazy
- Department of Agricultural Microbiology, Faculty of Agriculture, Cairo University, Giza District, Giza 12613, Egypt;
| | - Ahmed Magdy Khalil
- Texas Biomedical Research Institute, San Antonio, TX 78227, USA;
- Department of Zoonotic Diseases, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44519, Egypt
| | - Sara H. Mahmoud
- Center of Scientific Excellence for Influenza Viruses, National Research Center, Giza 12622, Egypt;
| | - Ahmed A. Khalil
- Veterinary Sera and Vaccines Research Institute (VSVRI), Agriculture Research Center (ARC), Cairo 11435, Egypt;
| | | | - Ahmed Mostafa
- Texas Biomedical Research Institute, San Antonio, TX 78227, USA;
- Center of Scientific Excellence for Influenza Viruses, National Research Center, Giza 12622, Egypt;
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Hegazy A, Mahmoud SH, Elshaier YAMM, Shama NMA, Nasr NF, Ali MA, El-Shazly AM, Mostafa I, Mostafa A. Antiviral activities of plant-derived indole and β-carboline alkaloids against human and avian influenza viruses. Sci Rep 2023; 13:1612. [PMID: 36709362 PMCID: PMC9883826 DOI: 10.1038/s41598-023-27954-0] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 01/10/2023] [Indexed: 01/29/2023] Open
Abstract
The persistent evolution of drug-resistant influenza strains represents a global concern. The innovation of new treatment approaches through drug screening strategies and investigating the antiviral potential of bioactive natural-based chemicals may address the issue. Herein, we screened the anti-influenza efficacy of some biologically active indole and β-carboline (βC) indole alkaloids against two different influenza A viruses (IAV) with varied host range ranges; seasonal influenza A/Egypt/NRC098/2019(H1N1) and avian influenza A/chicken/Egypt/N12640A/2016(H5N1). All compounds were first assessed for their half-maximal cytotoxic concentration (CC50) in MDCK cells and half-maximal inhibitory concentrations (IC50) against influenza A/H5N1. Intriguingly, Strychnine sulfate, Harmalol, Harmane, and Harmaline showed robust anti-H5N1 activities with IC50 values of 11.85, 0.02, 0.023, and 3.42 µg/ml, respectively, as compared to zanamivir and amantadine as control drugs (IC50 = 0.079 µg/ml and 17.59 µg/ml, respectively). The efficacy of the predefined phytochemicals was further confirmed against influenza A/H1N1 and they displayed potent anti-H1N1 activities compared to reference drugs. Based on SI values, the highly promising compounds were then evaluated for antiviral efficacy through plaque reduction assay and consistently they revealed high viral inhibition percentages at non-toxic concentrations. By studying the modes of antiviral action, Harmane and Harmalol could suppress viral infection via interfering mainly with the viral replication of the influenza A/H5N1 virus, whilst Harmaline exhibited a viricidal effect against the influenza A/H5N1 virus. Whereas, Strychnine sulfate elucidated its anti-influenza potency by interfering with viral adsorption into MDCK cells. Consistently, chemoinformatic studies showed that all studied phytochemicals illustrated HB formations with essential peptide cleft through the NH of indole moiety. Among active alkaloids, harmalol displayed the best lipophilicity metrics including ligand efficiency (LE) and ligand lipophilic efficiency (LLE) for both viruses. Compounds geometry and their ability to participate in HB formation are very crucial.
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Affiliation(s)
- Akram Hegazy
- Department of Agricultural Microbiology, Faculty of Agriculture, Cairo University, Giza District, 12613, Giza, Egypt
| | - Sara H Mahmoud
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza, 12622, Egypt
| | - Yaseen A M M Elshaier
- Department of Organic and Medicinal Chemistry, Faculty of Pharmacy, University of Sadat City, Sadat City, 32897, Menoufia, Egypt
| | - Noura M Abo Shama
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza, 12622, Egypt
| | - Nasr Fawzy Nasr
- Department of Agricultural Microbiology, Faculty of Agriculture, Cairo University, Giza District, 12613, Giza, Egypt
| | - M A Ali
- Department of Agricultural Microbiology, Faculty of Agriculture, Cairo University, Giza District, 12613, Giza, Egypt
| | - Assem Mohamed El-Shazly
- Department of Pharmacognosy, Faculty of Pharmacy, Zagazig University, Zagazig, 44519, Sharkia, Egypt.,Faculty of Pharmacy, El Saleheya El Gadida University, El Saleheya El Gadida, 44813, Sharkia, Egypt
| | - Islam Mostafa
- Department of Pharmacognosy, Faculty of Pharmacy, Zagazig University, Zagazig, 44519, Sharkia, Egypt.
| | - Ahmed Mostafa
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza, 12622, Egypt.
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Shokry S, Hegazy A, Abbas AM, Mostafa I, Eissa IH, Metwaly AM, Yahya G, El-Shazly AM, Aboshanab KM, Mostafa A. Phytoestrogen β-Sitosterol Exhibits Potent In Vitro Antiviral Activity against Influenza A Viruses. Vaccines (Basel) 2023; 11:228. [PMID: 36851106 PMCID: PMC9964242 DOI: 10.3390/vaccines11020228] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/14/2023] [Accepted: 01/17/2023] [Indexed: 01/22/2023] Open
Abstract
Influenza is a contagious infection in humans that is caused frequently by low pathogenic seasonal influenza viruses and occasionally by pathogenic avian influenza viruses (AIV) of H5, H7, and H9 subtypes. Recently, the clinical sector in poultry and humans has been confronted with many challenges, including the limited number of antiviral drugs and the rapid evolution of drug-resistant variants. Herein, the anti-influenza activities of various plant-derived phytochemicals were investigated against highly pathogenic avian influenza A/H5N1 virus (HPAIV H5N1) and seasonal low pathogenic human influenza A/H1N1 virus (LPHIV H1N1). Out of the 22 tested phytochemicals, the steroid compounds β-sitosterol and β-sitosterol-O-glucoside have very potent activity against the predefined influenza A viruses (IAV). Both steroids could induce such activity by affecting multiple stages during IAV replication cycles, including viral adsorption and replication with a major and significant impact on the virus directly in a cell-free status "viricidal effect". On a molecular level, several molecular docking studies suggested that β-sitosterol and β-sitosterol-O-glucoside exhibited viricidal effects through blocking active binding sites of the hemagglutinin surface protein, as well as showing inhibitory effects against replication through the binding with influenza neuraminidase activity and blocking the active sites of the M2 proton channel activity. The phytoestrogen β-sitosterol has structural similarity with the active form of the female sex hormone estradiol, and this similarity is likely one of the molecular determinants that enables the phytoestrogen β-sitosterol and its derivative to control IAV infection in vitro. This promising anti-influenza activity of β-sitosterol and its O-glycoside derivative, according to both in vitro and cheminformatics studies, recommend both phytochemicals for further studies going through preclinical and clinical phases as efficient anti-influenza drug candidates.
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Affiliation(s)
- Sara Shokry
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza 12622, Egypt
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Abbassia, Cairo 11566, Egypt
| | - Akram Hegazy
- Department of Agricultural Microbiology, Faculty of Agriculture, Cairo University, Giza District, Giza 12613, Egypt
| | - Ahmad M. Abbas
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Abbassia, Cairo 11566, Egypt
- Department of Microbiology and Immunology, Faculty of Pharmacy, King Salman International University (KSIU), Sinai 46612, Egypt
| | - Islam Mostafa
- Department of Pharmacognosy, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | - Ibrahim H. Eissa
- Pharmaceutical Medicinal Chemistry & Drug Design Department, Faculty of Pharmacy (Boys), Al-Azhar University, Cairo 11884, Egypt
| | - Ahmed M. Metwaly
- Pharmacognosy and Medicinal Plants Department, Faculty of Pharmacy (Boys), Al-Azhar University, Cairo 11884, Egypt
- Biopharmaceutical Products Research Department, Genetic Engineering and Biotechnology Research Institute, City of Scientific Research and Technological Applications (SRTA-City), Alexandria 21934, Egypt
| | - Galal Yahya
- Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | - Assem M. El-Shazly
- Department of Pharmacognosy, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
- Faculty of Pharmacy, El Saleheya El Gadida University, El Saleheya El Gadida 44813, Sharkia, Egypt
| | - Khaled M. Aboshanab
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Abbassia, Cairo 11566, Egypt
| | - Ahmed Mostafa
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza 12622, Egypt
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Hegazy A, Mostafa I, Elshaier YAMM, Mahmoud SH, Abo Shama NM, Shehata M, Yahya G, Nasr NF, El-Halawany AM, Ali MA, Ali MA, Mraheil MA, El-Shazly AM, Mostafa A. Robust Antiviral Activity of Santonica Flower Extract ( Artemisia cina) against Avian and Human Influenza A Viruses: In Vitro and Chemoinformatic Studies. ACS Omega 2022; 7:41212-41223. [PMID: 36406485 PMCID: PMC9670689 DOI: 10.1021/acsomega.2c04867] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 10/20/2022] [Indexed: 05/25/2023]
Abstract
The evolution of drug-resistant viral strains following natural acquisition of resistance mutations is a major obstacle to antiviral therapy. Besides the improper prescription of the currently licensed anti-influenza medications, M2-blockers and neuraminidase inhibitors, to control poultry outbreaks/infections potentiates the emergence of drug-resistant influenza variants. Therefore, there is always a necessity to find out new alternatives with potent activity and high safety. Plant extracts and plant-based chemicals represent a historical antiviral resource with remarkable safety in vitro and in vivo to control the emerging and remerging health threats caused by viral infections. Herein, a panel of purified plant extracts and subsequent plant-derived chemicals were evaluated for their anti-avian influenza activity against zoonotic highly pathogenic influenza A/H5N1 virus. Interestingly, santonica flower extract (Artemisia cina) showed the most promising anti-H5N1 activity with a highly safe half-maximal cytotoxic concentration 50 (CC50 > 10 mg/mL) and inhibitory concentration 50 (IC50 of 3.42 μg/mL). To confirm the anti-influenza activity, we assessed the anti-influenza activity of the selected plant extracts against seasonal human influenza A/H1N1 virus and we found that santonica flower extract showed a robust anti-influenza activity that was comparable to the activity against influenza A/H5N1. Furthermore, the mode of action for santonica flower extract with strong inhibitory activity on the abovementioned influenza strains was elucidated, showing a virucidal effect. To go deeper about the activity of the chemometric component of the extract, the major constituent, santonin, was further selected for in vitro screening against influenza A/H5N1 (IC50 = 1.701 μg/mL) and influenza A/H1N1 (IC50 = 2.91 μg/mL). The oxygen of carbonyl functionality in the cyclohexene ring succeeded to form a hydrogen bond with the neuraminidase active site. Despite the fact that santonin revealed similarity to both reference neuraminidase inhibitors in forming hydrogen bonds with essential amino acids, it illustrated shape alignment to oseltamivir more than zanamivir according to Tanimoto algorithms. This study highlights the applicability of santonica flower extract as a promising natural antiviral against low and highly pathogenic influenza A viruses.
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Affiliation(s)
- Akram Hegazy
- Department of Agricultural Microbiology, Faculty of Agriculture, Cairo University, Giza District, 12613Giza, Egypt
| | - Islam Mostafa
- Department of Pharmacognosy, Faculty of Pharmacy, Zagazig University, Zagazig44519, Egypt
| | - Yaseen A M M Elshaier
- Department of Organic and Medicinal Chemistry, Faculty of Pharmacy, University of Sadat City, Menoufia32897, Egypt
| | - Sara H Mahmoud
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza12622, Egypt
| | - Noura M Abo Shama
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza12622, Egypt
| | - Mahmoud Shehata
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza12622, Egypt
| | - Galal Yahya
- Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Zagazig44519, Egypt
| | - Nasr Fawzy Nasr
- Department of Agricultural Microbiology, Faculty of Agriculture, Cairo University, Giza District, 12613Giza, Egypt
| | - Ali M El-Halawany
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Giza11562, Egypt
| | - Mohamed Abdelalim Ali
- Department of Agricultural Microbiology, Faculty of Agriculture, Cairo University, Giza District, 12613Giza, Egypt
| | - Mohamed A Ali
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza12622, Egypt
| | - Mobarak Abu Mraheil
- German Center for Infection Research (DZIF), Institute of Medical Microbiology, Justus-Liebig University, 35392Giessen, Germany
| | - Assem M El-Shazly
- Department of Pharmacognosy, Faculty of Pharmacy, Zagazig University, Zagazig44519, Egypt
- Faculty of Pharmacy, El Saleheya El Gadida University, El Saleheya El Gadida44813, Egypt
| | - Ahmed Mostafa
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza12622, Egypt
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Caddell A, Nagpal D, Hegazy A. A POST-ARREST CARE BUNDLE IMPROVES QUALITY OF CARE AND CLINICAL OUTCOMES DURING THE NORMOTHERMIA ERA. Can J Cardiol 2022. [DOI: 10.1016/j.cjca.2022.08.145] [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: 12/01/2022] Open
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Rathinam C, Sauer M, Ghosh A, Rudolph C, Hegazy A, Schlegelberger B, Welte K, Klein C. Correction: Generation and characterization of a novel hematopoietic progenitor cell line with DC differentiation potential. Leukemia 2021; 35:2139. [PMID: 33875794 DOI: 10.1038/s41375-021-01223-3] [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: 11/09/2022]
Affiliation(s)
- C Rathinam
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany
| | - M Sauer
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany
| | - A Ghosh
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany
| | - C Rudolph
- Institute for Cell and Molecular Pathology, Hannover Medical School, Hannover, Germany
| | - A Hegazy
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany
| | - B Schlegelberger
- Institute for Cell and Molecular Pathology, Hannover Medical School, Hannover, Germany
| | - K Welte
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany
| | - C Klein
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany.
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Abd El-Hady W, Hegazy A. Effect of Potassium and Salicylic Acid Foliar Application on Dieffenbachia picta Plants with Different Irrigation Water Rates. Journal of Plant Production 2021; 12:97-103. [DOI: 10.21608/jpp.2021.152024] [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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Alrefaie Z, Al-Hayani A, Hassanien M, Hegazy A. Implementing group research assignment in undergraduate medical curriculum; impact on students' performance and satisfaction. BMC Med Educ 2020; 20:229. [PMID: 32690095 PMCID: PMC7370433 DOI: 10.1186/s12909-020-02137-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 07/02/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Medical educators need to integrate research skills within undergraduate medical curriculum to help students perceive their relevance to routine doctor's practice. The current work aimed to assess the impact of including group research assignment in the endocrine module to third year medical students on attaining some research, communication and E learning skills and on their performance in the module. METHODS Students carried out a group research activity (N = 10), wrote a report and presented their work as a poster, booklet or video clip. Multiple evaluation methods were used; a questionnaire to assess students' satisfaction and perception towards the skills acquired and a rubric to grade the research report and presentation. Also, students' final grades in the module were compared with that of the previous cohort who didn't conduct the research assignment. RESULTS Students' response rate to the questionnaire was 50%. 73.6% of students agreed that research enhanced critical evaluation of literature while 65.5% felt confident to further participate in research and 66.7% were satisfied about the whole research experience. Mean score of assignment was 84% for female students and 78% for male students. Grades of the current cohort in the endocrine module were significantly higher than that of the preceding cohort (78.7 ± 11 and 70.2 ± 13 respectively P< 0.001). CONCLUSION The current study pointed to the positive impact of implementing group research assignment within the undergraduate medical curriculum. Students were satisfied about the research exposure, agreed attaining some skills and got higher grades than preceding peers.
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Affiliation(s)
- Z Alrefaie
- Physiology Department, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia.
- Physiology Department, Faculty of Medicine, Cairo University, Cairo, Egypt.
| | - A Al-Hayani
- Vice President, Educational affairs & Anatomy Department, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - M Hassanien
- Educational affairs and College of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
- Medical Biochemistry department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - A Hegazy
- Community Medicine, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
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Abd- ElGhany M, Hegazy A, Basuny A, Zaghlool A. Using of red palm oil as milk fat healthy replacer in ice milk. Al-Azhar Journal of Agricultural Research 2020; 45:8-22. [DOI: 10.21608/ajar.2020.126614] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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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Alnajjar A, Hegazy A, Al Ghanim N. THU0588 TAKAYASU’S ARTERITIS PRESENTING WITH UNILATERAL DIGITAL CLUBBING IN A 23 YEAR-OLD MALE. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.3859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Takayasu Arteritis is a chronic, large vessel arteritis that commonly involves the aorta and its major branches, mostly the ascending/descending aorta, subclavian arteries, and carotids [1].Herein, we report a case of a 23 year-old medically free Indian male who presented to our hospital in acute distress complaining of cough, hemoptysis and shortness of breath for one week as well as intermittent fever and fatigue for five months. He presented with a BP of 140/100 mmHg as well was both systolic and early diastolic murmurs in the mitral and aortic areas, respectively. He also had a paraumbilical bruit and unilateral clubbing in the left hand with digital ischemia of the left index finger. Doppler ultrasound of the left arm showed monophasic flow pattern with low velocity in left distal radial, distal ulnar, and all digital arteries, except the second digital arteries; low velocity in the median artery; and no flow in the lateral artery of second digit (Figure 1). Computed tomography angiogram (CT Angio) (Figure 2) of the chest, abdomen, and pelvis showed fusiform aneurysm dilatation of the thoracic aorta extending into the right braciocephalic and subclavian arteries as well as the right common carotid artery.Figure 1.Figure 2.Unilateral clubbing in patients with TA occurs as a result of subclavian artery stenosis that leads to tissue ischemia and hypoxia [2-4]. In turn, the bone marrow release megakaryocytes, which enter the systemic circulation when an A-V shunt exists [5]. Platelet-derived growth factor (PDGF) (release from megakaryocytes) and vascular endothelial growth factor (VEGF) levels are highly expressed in the connective tissues of nail beds, leading to its proliferation and platelets clumps‘ accumulation [6, 7].Objectives:To report the fourth case worldwide and third case of an adult, respectively, with Takayasu’s arteritis who presents with unilateral clubbing.Methods:Our patient was started on pulse steroid therapy of methylprednisolone 1 gram IV od for 5 days and later switched to prednisolone 20 mg po BID. He also received methotrexate 10 mg PO once weekly and rituximab 750 mg IV stat; another dose of rituximab was given two weeks later.Results:His clubbing has significantly improved within 2 weeks of starting immunosuppressive therapy. He was discharged with follow up on methotrexate 12.5 mg PO once weekly and prednisilone 20 mg PO OD (to be tapered). Clubbing improved by a rate of 60% two weeks following discharge in two weeks.Conclusion:In all four cases of Takayasu arteries presenting with unilateral clubbing, patients’ clinical condition including presence of clubbing improved after initiation of immunosuppressive therapy.References:[1]Alibaz-Öner, F., Aydin, S. Z., & Direskeneli, H. (2015). Recent advances in Takayasu’s arteritis.European Journal of Rheumatology,2(1), 24–30.[2]Kaditis AG, Nelson AM, Driscoll DJ. Takayasu\’s arteritis presenting with unilateral digital clubbing. J Rheumatol 1995;22:2346-8.[3]Ishikawa M, Okada J, Kondo H. Takayasu’s arteritis with transient clubbed finger. Clin Exp Rheumatol 1999;17:629-30.[4]Bivilibal M, Duru N, Dogdu G, Elevli M, Ayta S. A Takayasu’s Arteritis Case with Unilateral Digital Clubbing. Turk J Rheumatol. 2011;26(2):163–166.[5]Martínez-Lavín M. Hypertrophic osteoarthropathy. Curr Opin Rheumatol. 1997 Jan;9(1):83-6. Review. PubMed PMID: 9110140.[6]Dickinson CJ, Martin JF. Megakaryocytes and platelet clumps as the cause of finger clubbing. Lancet 1987;2:1434-5.[7]Atkinson S, Fox SB. Vascular endothelial growth factor (VEGF)-A and platelet-derived growth factor (PDGF) play a central role in the pathogenesis of digital clubbing. J Pathol 2004;203:721-8.Disclosure of Interests:None declared
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Gohar S, Abd El Aziz K, Abd El Bary N, Shehata M, Alhassanin S, Hegazy A. Paclitaxel as continuation maintenance therapy in patients with advanced non-small cell lung cancer. Ann Oncol 2019; 30:ix172. [DOI: 10.1093/annonc/mdz437.036] [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: 09/01/2023] Open
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Hegazy A, Khalil A, El-Alfi E, El-Shahat M. Durability of supersulphated cement pastes activated with Portland cement in magnesium chloride solution. Egypt J Chem 2019. [DOI: 10.21608/ejchem.2019.6563.1579] [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: 10/27/2022]
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El-Bendary M, Neamatallah M, Elalfy H, Besheer T, El-Setouhy M, Youssef MM, Zein M, Elhammady D, Hegazy A, Esmat G. Association of genetic polymorphisms of chemokines and their receptors with clearance or persistence of hepatitis C virus infection. Br J Biomed Sci 2018; 76:11-16. [PMID: 30175654 DOI: 10.1080/09674845.2018.1518299] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Polymorphisms of certain genes may have an effect on either persistence of infection or spontaneous clearance of hepatitis C virus (HCV). We hypothesized that one or more variants of chemokines (CCL2 and CCL5) and chemokine receptors (CC chemokine receptor type 2 [CCR2]) genes are associated with the susceptibility to HCV infection. METHODS We recruited 1460 patients with chronic HCV (CHC), 108 subjects with spontaneous virus clearance (SVC) and 1446 individuals as a healthy control group. All were genotyped for single nucleotide polymorphisms: rs13900 C/T of CCL2, rs3817655 T/A of CCL5 and rs743660 G/A and rs1799864 G/A of CCR2 using allelic discrimination real-time PCR technique. RESULTS The carriage of the A allele of CCR2 rs743660 was significantly higher in CHC compared to SVC (odds ratio [OR] 4.03) and to controls (1.42) and in controls compared to SVC (2.85) (all P < 0.01). Similarly, the A allele of CCR2 rs1799864 was significantly higher in the CHC group when compared with both SVC (1.97) and controls (2.13) (both P < 0.01), but the OR between controls and SVC was not significant (1.08, P = 0.723). Carriage of C allele of CCL2 rs13900 and the T allele of CCL5 rs3817655 were significantly higher in SVC group when compared with both CHC (OR = 0.19 and OR = 0.24, respectively) and control groups (OR = 0.65 and OR = 0.45, respectively [all P < 0.01]). CONCLUSIONS Susceptibility to HCV infection is associated with A alleles of both (rs743660 and rs1799864 G/A) of CCR2 while spontaneous clearance of HCV is associated with the C allele of rs13900 of CCL2 and T allele of rs3817655 of CCL5.
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Affiliation(s)
- M El-Bendary
- a Tropical Medicine and Hepatology Department , Mansoura University , Mansoura , Egypt
| | - M Neamatallah
- b Medical Biochemistry Department, Faculty of Medicine , Mansoura University , Mansoura , Egypt
| | - H Elalfy
- a Tropical Medicine and Hepatology Department , Mansoura University , Mansoura , Egypt
| | - T Besheer
- a Tropical Medicine and Hepatology Department , Mansoura University , Mansoura , Egypt
| | - M El-Setouhy
- c Department of Community, Environmental and Occupational Medicine, Faculty of Medicine , Ain-Shams University , Cairo , Egypt.,d Department of Family and Community Medicine, Faculty of Medicine , Jazan University , Jazan , Saudi Arabia
| | - M M Youssef
- e Chemistry Department, Faculty of Science , Mansoura University , Mansoura , Egypt
| | - M Zein
- e Chemistry Department, Faculty of Science , Mansoura University , Mansoura , Egypt
| | - D Elhammady
- a Tropical Medicine and Hepatology Department , Mansoura University , Mansoura , Egypt
| | - A Hegazy
- f Internal Medicine Department, Faculty of Medicine , Al-Azhar University , Cairo , Egypt
| | - G Esmat
- g Endemic Medicine and Endemic Hepatogastroenterology Department, Faculty of Medicine , Cairo University , Cairo , Egypt
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El-Bendary M, Neamatallah M, Elalfy H, Besheer T, Elkholi A, El-Diasty M, Elsareef M, Zahran M, El-Aarag B, Gomaa A, Elhammady D, El-Setouhy M, Hegazy A, Esmat G. The association of single nucleotide polymorphisms of Toll-like receptor 3, Toll-like receptor 7 and Toll-like receptor 8 genes with the susceptibility to HCV infection. Br J Biomed Sci 2018; 75:175-181. [DOI: 10.1080/09674845.2018.1492186] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- M El-Bendary
- Tropical Medicine and Hepatology Department, Faculty Of Medicine, Mansoura University, Mansoura, Egypt
| | - M Neamatallah
- Medical Biochemistry Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - H Elalfy
- Tropical Medicine and Hepatology Department, Faculty Of Medicine, Mansoura University, Mansoura, Egypt
| | - T Besheer
- Tropical Medicine and Hepatology Department, Faculty Of Medicine, Mansoura University, Mansoura, Egypt
| | - A Elkholi
- Gastroenterology Department, Health Insurance Hospital, Mansoura, Egypt
| | - M El-Diasty
- Tropical Medicine and Hepatology Department, Faculty Of Medicine, Mansoura University, Mansoura, Egypt
| | - M Elsareef
- Biochemistry Division, Chemistry Department, Faculty of Science, Menoufia University, Shebin El-Koom, Egypt
| | - M Zahran
- Chemistry Department, Faculty of Science, Menoufia University, Shebin El-Koom, Egypt
| | - B El-Aarag
- Biochemistry Division, Chemistry Department, Faculty of Science, Menoufia University, Shebin El-Koom, Egypt
| | - A Gomaa
- Zoology Department, Faculty of Science, Alazhar University, Cairo, Egypt
| | - D Elhammady
- Tropical Medicine and Hepatology Department, Faculty Of Medicine, Mansoura University, Mansoura, Egypt
| | - M El-Setouhy
- Department of Community, Environmental, and Occupational Medicine, Faculty of Medicine, Ain-Shams University, Cairo, Egypt; Substance Abuse Research Center (SARC), Jazan University, Jazan, Kingdom of Saudi Arabia
| | - A Hegazy
- Internal Medicine Department, Faculty of Medicine, Alazhar University, Cairo, Egypt
| | - G Esmat
- Endemic Medicine and Endemic Hepatogastroenterology Department, Faculty of Medicine, Cairo University, Cairo, Egypt
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Abd El-Rhaman Z, Hegazy A, Mostafa M, El-Sedfy O. EVALUATION OF STABILITY AND MATURITY OF COMPOSTED RICE STRAW, OLIVE POMACE AND SOME AGRICULTURAL WASTES. Arab Universities Journal of Agricultural Sciences 2018; 26:267-279. [DOI: 10.21608/ajs.2018.13993] [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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Hegazy A, Ghallab AO, Ashour FH. Integrated gasification combined cycle using Egyptian Maghara coal-rice straw feedstock. Waste Manag Res 2017; 35:656-668. [PMID: 28462684 DOI: 10.1177/0734242x17702728] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Rice straw is an agricultural waste that causes an annoying problem in Egypt if it is not well exploited. This study focuses on using this waste in power generation by co-gasification of Egyptian Maghara coal and rice straw blends using entrained flow gasifier technology. Aspen Plus was used to conduct a parametric study for investigation of the effect of changing the inputs to the gasifier on the produced gas composition. Three different input parameters, influencing the performance of the gasifier, including the percentage of coal to rice straw in the blend, the fraction of added water to the blend, and the mass percentage of oxygen with respect to the mass of the blend fed to the gasifier were analysed. Two alternative power production schemes (with and without carbon capturing) have been investigated. The obtained optimum feed conditions are: 40% coal in the feed blend, 20% water concentration in the feed slurry, and 80% oxygen with respect to the dry feed blend to the gasifier. For (10 0000 kg per hour) of the feed blend, the power generated was 270.1 MW in the case of non-carbon capturing, while in the case of carbon capturing, 263.52 MW was generated. Although it produces less power, applying carbon capturing techniques means handling less flue gas and thus using smaller gas turbines and results in more environmentally friendly emissions.
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Affiliation(s)
- A Hegazy
- Chemical Engineering Department, Cairo University, Giza, Egypt
| | - A O Ghallab
- Chemical Engineering Department, Cairo University, Giza, Egypt
| | - F H Ashour
- Chemical Engineering Department, Cairo University, Giza, Egypt
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Hegazy A, Lebdah M, Abd-El Samie L, Abd-Allah H, Abd-Allah E. COMPARATIVE STUDY ON SONICATED AND FORMALIN INACTIVATED E.COLI VACCINES IN CHICKENS. Mansoura Veterinary Medical Journal 2016; 17:1-10. [DOI: 10.21608/mvmj.2016.129780] [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: 09/01/2023]
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Hegazy A, Lapierre D, Althenayan E. Targeted temperature management after cardiac arrest and fever control with an esophageal cooling device. Crit Care 2015. [PMCID: PMC4471495 DOI: 10.1186/cc14504] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
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Khalifa H, Hegazy A, Eldeen AZ, Hussein I, Saad I, Maamoun S. 172. Evaluating assessment tools to predict axillary status postneoadjuvant chemotherapy in locally advanced breast carcinoma. Eur J Surg Oncol 2014. [DOI: 10.1016/j.ejso.2014.08.167] [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: 11/30/2022] Open
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Sobh K, Hegazy A. Feasibility and outcomes of endovascular embolization of cerebral arteriovenous malformations at a low-volume centre. J Vasc Interv Neurol 2013; 5:4-8. [PMID: 23459250 PMCID: PMC3584819] [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] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND AND PURPOSE Herein, we report our initial experience with the endovascular management of cerebral arteriovenous malformations (AVMs) using the liquid embolic agent Onyx and n-butyl cyanoacrylate for AVM embolization. METHODS We reviewed data from 15 patients with brain AVMs, who were observed at our endovascular facility from January 2008 to July 2011. All cases were embolized with Onyx and/or n-butyl cyanoacrylate. There were 8 women and 7 men with a mean age of 27.2 years (range 17-43 years). The clinical presentations included intracerebral haemorrhage (n = 7), seizures (n = 4), headache (n = 2), and focal neurological deficits (n = 2); according to the Spetzler-Martin classification (Spetzler R and Martin N (1986) J NeurosurgV65 446-83), 8 AVMs were grades I-II, 5 were grade III, and 2 were grades IV-V. RESULTS A total of 31 embolization procedures were performed in 15 patients, and 44 feeding pedicles were embolized, ranging from 1 to 5 per patient, with an average size reduction of 70% (median 75%, range 40-100%). Total obliteration was achieved for 3 AVMs (20%) (2 patients had single feeders and 1 patient had double feeders), and a partial embolization was achieved in 12 patients (80%). The procedure was related to a permanent disabling morbidity in one patient (6.6%), and no mortalities occurred. CONCLUSIONS The outcome of (AVM) embolization in our centre is comparable to the reported outcome in other larger-volume centres. The feasibility and safety of AVM embolization in our low-volume centre are similar to the outcomes reported at high-volume centre.
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Affiliation(s)
- K Sobh
- Department of Neurology, Al-Azhar University, Cairo, Egypt
| | - A Hegazy
- Department of Neurosurgery, Cairo University, Cairo, Egypt
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Awadalla NJ, Hegazy A, Elmetwally RA, Wahby I. Occupational and environmental risk factors for idiopathic pulmonary fibrosis in Egypt: a multicenter case-control study. Int J Occup Environ Med 2012; 3:107-116. [PMID: 23022860] [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] [Received: 01/30/2012] [Accepted: 02/02/2012] [Indexed: 06/01/2023]
Abstract
BACKGROUND Despite the advances in medical therapy and technology, the prognosis of idiopathic pulmonary fibrosis (IPF) remains poor and the need for disease prevention based on identifying the risk factors becomes mandatory. Occupational and environmental exposures were studied in several countries and found to play important role in the disease development. However, in Egypt, a little attention has been paid to study the effect of these factors in the disease development. OBJECTIVE To identify the occupational and environmental risk factors associated with the development of IPF in Egypt. METHODS A multicenter hospital-based case-control study was carried out in chest hospitals affiliated to three Egyptian cities-Cairo, Tanta and Mansoura. Subjects were 201 patients with confirmed IPF (cases) and 205 age-, sex- and residence-matched controls. Data on occupational and environmental factors were obtained from a questionnaire. Multiple logistic regression analysis was used to determine the independent risk factors of IPF in both sexes for single factors with adjustment for age, residence and smoking status. RESULTS Compared with the controls, the risk of IPF in male workers was observed to increase significantly in chemical and petrochemical industries and carpentry and wood working (OR = 2.56, 95% CI: 1.02-7.01), and with occupational exposures to wood dust and wood preservatives. Among female workers, a significant increase was observed in farming (OR = 3.34, 95% CI: 1.17-10.12), raising birds and occupational exposures to animal feeds, products and dusts and pesticides. Risk of IPF decreased significantly in male workers and insignificantly among female workers in sales and clerical related activities. The environmental exposures to birds and cats were significantly associated with elevated risk of IPF development in both sexes. CONCLUSION In Egypt, farming, raising birds and wood working are important risk factors for the development of IPF.
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Affiliation(s)
- N J Awadalla
- Department of Public Health and Preventive Medicine, Mansoura University, Egypt.
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Eldine NN, Eldine AM, Sanaad A, Hegazy A. O686 The use of colposcopy versus colposcopy and optical detection system in diagnosis of squamous intraepithelial lesions of the cervix: A clinical comparative study. Int J Gynaecol Obstet 2011. [DOI: 10.1016/s0020-7292(09)61059-6] [Citation(s) in RCA: 1] [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: 11/30/2022]
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Stittrich AB, Haftmann C, Hegazy A, Floessdorf M, Dong J, Fuhrmann F, Heinz G, Li N, Fang Z, Jahn A, Baumgrass R, Grun J, Chen W, Hofer T, Lohning M, Chang HD, Rajewsky N, Radbruch A, Mashreghi MF. MicroRNA-182 promotes clonal expansion of activated T helper cells. Ann Rheum Dis 2010. [DOI: 10.1136/ard.2010.129668a] [Citation(s) in RCA: 1] [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: 11/03/2022]
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Lovett-Doust J, Hegazy A, Hammouda O, Gomaa N. Abundance-occupancy relationships and implications for conservation of desert plants in the northwestern Red Sea region. COMMUNITY ECOL 2009. [DOI: 10.1556/comec.10.2009.1.11] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Shaban A, Kodera A, Elghoneimy MN, Orban T, Mursi K, Hegazy A. Safety and Efficacy of Supracostal Access in Percutaneous Renal Surgery. J Endourol 2008; 22:29-34. [DOI: 10.1089/end.2007.0054] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- A. Shaban
- Department of Urology, Cairo University, Cairo, Egypt
| | - A. Kodera
- Department of Urology, Cairo University, Cairo, Egypt
| | | | - T.Z. Orban
- Department of Urology, Cairo University, Cairo, Egypt
| | - K. Mursi
- Department of Urology, Cairo University, Cairo, Egypt
| | - A. Hegazy
- Department of Urology, Cairo University, Cairo, Egypt
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Hegazy A, Lovett-Doust J, Hammouda O, Gomaa N. Vegetation distribution along the altitudinal gradient in the northwestern Red Sea region. COMMUNITY ECOL 2007. [DOI: 10.1556/comec.8.2007.2.2] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Sayed-Ahmed N, Hegazy A, Abou-Samra N, Selim T, Azzam H, Elshaarawy S. PO-89 Evaluation of some hemostatic parameters in patients with end-stage renal disease: relation to dyslipidemia and hemodialysis therapy. Thromb Res 2007. [DOI: 10.1016/s0049-3848(07)70242-6] [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: 10/22/2022]
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Rathinam C, Sauer M, Ghosh A, Rudolph C, Hegazy A, Schlegelberger B, Welte K, Klein C. Generation and characterization of a novel hematopoietic progenitor cell line with DC differentiation potential. Leukemia 2006; 20:870-6. [PMID: 16511513 DOI: 10.1038/sj.leu.2404157] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [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: 01/16/2023]
Abstract
Studies of hematopoietic stem cell (HSC)-derived dendritic cells (DCs) are often limited by the rarity of HSC. To facilitate the study of DCs, we have generated a novel cell line (CR1) by retroviral Notch(IC) gene transfer into Sca1(+)ckit(+)lin- HSC. CR1 cells proliferated in vitro in the presence of recombinant interleukin-3. They maintained an immature progenitor cell phenotype and an intact karyotype. In the presence of granulocyte-macrophage colony-stimulating factor or Flt3L, CR1 cells differentiated into myeloid and plasmacytoid DCs, respectively. Functionally, CR1 cells were comparable to primary bone-marrow-derived DCs with respect to Toll-like-receptor-mediated maturation, cytokine release and capacity to induce effective antitumor immunity. CR1 cells thus provide an elegant new cellular tool to study DC development, function and preclinical DC-based immunotherapies.
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Affiliation(s)
- C Rathinam
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany
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Elhanbly S, Schoor R, Niederberger C, Elmogy M, Hegazy A, Ross L. Cigarette smoking: penile hemodynamic changes resulting in erectile dysfunction. Fertil Steril 2001. [DOI: 10.1016/s0015-0282(01)02772-8] [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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Bammert K, Hegazy A, Lange H. Die solare Einstrahlungsverteilung in Hohlraumreceivern bei Ungenauigkeit von Spiegelkontur und Sonnennachführung / Determination of the radiation distribution in solar heated receivers with real parabolic dish collectors. KERNTECHNIK 1987. [DOI: 10.1515/kern-1987-500311] [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: 11/15/2022]
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Abstract
Clinical and pathological changes following neurectomy were studied experimentally in 46 male and female equids. Sixty-three operations were performed using either the traditional or the Fackelman and Clodius methods of neurectomy. The effect of arteriovenous ligation was studied in 12 animals and 20 angiograms were performed post mortem to study the arterial pattern of the extremities of the operated limb. Neuroma formation (31 cases) and sloughing of the hoof (five cases) were the two main untoward sequelae. Neurectomy by the technique of Fackelman and Clodius proved superior to the traditional method. No essential changes were observed after ligation of the blood vessels, except in one case where collateral circulation was established.
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