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Gouda MM, Abbas MI, Eid MH, Ziedan MS, Ibrahim MA, Tawfik MM, El-Khatib AM. Impact of micro/nano cadmium oxide on shielding properties of cement-ball clay matrix. Sci Rep 2023; 13:18224. [PMID: 37880284 PMCID: PMC10600101 DOI: 10.1038/s41598-023-45516-2] [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: 08/19/2023] [Accepted: 10/20/2023] [Indexed: 10/27/2023] Open
Abstract
This study investigates the gamma radiation shielding properties of cement-ball clay matrix composites doped with micro- and nano-sized cadmium oxide (CdO) particles. The linear attenuation coefficient (LAC) was determined using a sodium iodide (NaI) detector and five radioactive point sources with energies ranging from 59.5 to 1408 keV. The LAC values obtained were compared to the XCOM database and found to be in good agreement. The composites' half-value layer (HVL), tenth value layer (TVL), mean free path (MFP), effective atomic number (Zeff), equivalent atomic number (Zeq), and absorption buildup factor (EABF) were determined. The results showed that the addition of CdO particles improved the radiation-shielding behavior of the composites and increasing the weight fraction of CdO particles increased the shielding effectiveness. The results also illustrated that when nano-sized CdO particles were compared to their micro-sized counterparts, there was a significant enhancement in radiation shielding effectiveness. For instance, a composite material composed of 50% cement, 41.7% ball clay, and 3.8% nano CdO at an energy level of 0.0595 MeV exhibited a remarkable 12.2% increase in attenuation, surpassing the performance of the micro-sized sample with an equivalent concentration. Similarly, another composite consisting of 50% cement, 33.3% ball clay, and 16.7% nano CdO demonstrated a significant 15.4% increase in attenuation at the same energy level, when compared to the micro-sized sample. The study demonstrates the potential of CdO-doped cement-ball clay matrix composites for gamma radiation shielding applications.
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Affiliation(s)
- Mona M Gouda
- Physics Department, Faculty of Science, Alexandria University, Alexandria, 21511, Egypt.
| | - Mahmoud I Abbas
- Physics Department, Faculty of Science, Alexandria University, Alexandria, 21511, Egypt
| | - Malak H Eid
- Physics Department, Faculty of Science, Alexandria University, Alexandria, 21511, Egypt
| | - Mohamed S Ziedan
- Physics Department, Faculty of Science, Alexandria University, Alexandria, 21511, Egypt
| | - Moaaz A Ibrahim
- Physics Department, Faculty of Science, Alexandria University, Alexandria, 21511, Egypt
| | - Mohamed M Tawfik
- Physics Department, Faculty of Science, Alexandria University, Alexandria, 21511, Egypt
| | - Ahmed M El-Khatib
- Physics Department, Faculty of Science, Alexandria University, Alexandria, 21511, Egypt
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2
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Elfar SA, Bahgat IM, Shebl MA, Lihoreau M, Tawfik MM. Intraspecific Variability in Proteomic Profiles and Biological Activities of the Honey Bee Hemolymph. Insects 2023; 14:365. [PMID: 37103179 PMCID: PMC10142140 DOI: 10.3390/insects14040365] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/29/2023] [Accepted: 04/03/2023] [Indexed: 06/19/2023]
Abstract
Pollinator declines have raised major concerns for the maintenance of biodiversity and food security, calling for a better understanding of environmental factors that affect their health. Here we used hemolymph analysis to monitor the health status of Western honey bees Apis mellifera. We evaluated the intraspecific proteomic variations and key biological activities of the hemolymph of bees collected from four Egyptian localities characterized by different food diversities and abundances. Overall, the lowest protein concentrations and the weakest biological activities (cytotoxicity, antimicrobial and antioxidant properties) were recorded in the hemolymph of bees artificially fed sucrose solution and no pollen. By contrast, the highest protein concentrations and biological activities were recorded in bees that had the opportunity to feed on various natural resources. While future studies should expand comparisons to honey bee populations exposed to more different diets and localities, our results suggest hemolymph samples can be used as reliable indicators of bee nutrition.
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Affiliation(s)
- Salma A. Elfar
- Zoology Department, Faculty of Science, Port Said University, Port Said 42526, Egypt
| | - Iman M. Bahgat
- Zoology Department, Faculty of Science, Port Said University, Port Said 42526, Egypt
| | - Mohamed A. Shebl
- Department of Plant Protection, Faculty of Agriculture, Suez Canal University, Ismailia 41522, Egypt
| | - Mathieu Lihoreau
- Research Center on Animal Cognition, Center for Integrative Biology, Centre National de la Recherche Scientifique, University Paul Sabatier, 31062 Toulouse, France
| | - Mohamed M. Tawfik
- Zoology Department, Faculty of Science, Port Said University, Port Said 42526, Egypt
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3
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Tawfik MM, Galal B, Nafie MS, El Bous MM, El-Bana MI. Cytotoxic, apoptotic activities and chemical profiling of dimorphic forms of Egyptian halophyte Cakile maritima scop. J Biomol Struct Dyn 2023; 41:147-160. [PMID: 34854366 DOI: 10.1080/07391102.2021.2004231] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Cakile maritima ssp. aegyptiaca (Wild.) Nyman is growing with dimorphic leaf forms (entire or pinnatifid lamina) along the Mediterranean coast of Egypt. The cytotoxic activities of dried shoot systems of the two morphological forms were evaluated by testing and comparing the effects of ethanolic and aqueous extracts on the viability of five human cell lines. GC-MS analysis was performed to identify the bioactive and anticancer compounds present in the most active extracts. MTT assay indicated that both aqueous and ethanolic extracts have selective cytotoxic activities against cancer cell lines with no inhibitory activities against normal Wi38 or Vero cell lines. The underlying mechanism of cytotoxicity involved the induction of G2/M phase arrest in targeted cells MCF-7 and HCT-116 associated with inducing apoptosis in both cell lines, as indicated by Annexin-V assay. Apoptosis investigation in MCF-7 and HCT-116 cells treated with ethanolic extracts, was further investigated through RT-PCR, which exhibited elevation of proapoptotic genes of P53, BAX, Capase-3,6,7,8,9, and downregulation of antiapoptotic gene (BCL-2) upon treatment. The GC-MS analysis of ethanolic extracts of pinnatifid and entire forms revealed the existence of 18 and 13 compounds, respectively, with eleven compounds that were detected in pinnatifid form only and seven compounds were identified exclusively in the entire form. Molecular Docking study revealed that the identified compounds exhibited good binding affinity towards BCL-2 inhibition, and this agreed with the suggested apoptotic mechanism. To the best of authors' knowledge, this is the first scientific evidence underline the variability in the chemical composition associated with variable anticancer activities of dimorphic forms of C. maritima.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Mohamed M Tawfik
- Zoology Department, Faculty of Science, Port Said University, Port Said, Egypt
| | - Bassant Galal
- Botany Department, Faculty of Science, Port Said University, Port Said, Egypt
| | - Mohamed S Nafie
- Chemistry Department, Faculty of Science, Suez Canal University, Ismailia, Egypt
| | - Mona M El Bous
- Botany Department, Faculty of Science, Port Said University, Port Said, Egypt
| | - Magdy I El-Bana
- Botany Department, Faculty of Science, Port Said University, Port Said, Egypt
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4
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Tawfik MM, Ebrahim A, Hamed S, Haroun M. Transcranial Doppler assessment of patients with cerebral small vessel disease. Egypt J Neurol Psychiatry Neurosurg 2022. [DOI: 10.1186/s41983-022-00591-6] [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: 12/14/2022] Open
Abstract
Abstract
Background
Cerebral small vessel disease (SVD) is associated with acute events such as lacunar and hemorrhagic strokes, or chronic events such as cognitive deficit in the form of subcortical dementia, mood deficit in the form of late onset depression, sphincteric affection, and gait apraxia. Under conditions of moderate blood flow deficit, the inability of sclerotic vessels to dilate due to impairment of the cerebral autoregulation, renders the periventricular white matter seriously ischemic. Therefore, it is important to detect the implications of cerebral large artery disease on the severity of SVD, and the ability of transcranial duplex (TCD) to evaluate it in people at risk.
Methods
Fifty lacunar stroke patients were recruited, and evaluated using MRI brain to assess SVD score, carotid duplex and TCD to assess extracranial and intracranial stenoses, respectively.
Results
Both intracranial and extracranial stenoses showed significant relation to the severity of cerebral SVD. Moreover, there were significant relation between intracranial stenosis and presence of lacuna and EPVS.
Conclusion
Cerebral large artery disease contributes to the pathogenesis and severity of cerebral SVD. Therefore, TCD may be a useful tool for the prediction of occurrence of cerebral SVD in high-risk individuals, especially hypertensives.
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Salam HS, Tawfik MM, Elnagar MR, Mohammed HA, Zarka MA, Awad NS. Potential Apoptotic Activities of Hylocereus undatus Peel and Pulp Extracts in MCF-7 and Caco-2 Cancer Cell Lines. Plants 2022; 11:plants11172192. [PMID: 36079573 PMCID: PMC9459728 DOI: 10.3390/plants11172192] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/13/2022] [Accepted: 08/19/2022] [Indexed: 11/29/2022]
Abstract
There is a huge demand for novel anticancer agents with fewer side effects compared to current therapies. Pitaya, or dragon fruit, is a reservoir of potent anticancer compounds. This research aimed to analyze the phytochemical components of Hylocereus undatus pulp and peel extracts using LC-MS and GC-MS, and to investigate the in vitro effects of both extracts against cancer (breast, MCF-7, and colon, Caco-2) and normal (lung; WI-38 and breast; MCF-10A) cell proliferation using the MTT assay. The apoptosis potential of the anticancer effects was also evaluated using flow cytometry, RT-PCR, and Western blot. The total phenolic and flavonoid contents in the peel extract were significantly higher than those in the pulp extract. Compared to the flavonoid and phenolic acid standards, the LC-MS analysis revealed the presence of nine compounds, which were represented as 84.32 and 5.29 µg/g of the flavonoids and 686.11 and 148.72 µg/g of the phenolic acids in the peel and pulp extracts, respectively. Among the identified compounds, chlorogenic acid, caffeic acid, ferulic acid, and rutin were found at the highest concentration in both plant extracts. Both extracts displayed cytotoxic activity against MCF-7 and Caco-2 cancer cells after 48 h of treatment at IC50 values ranging from 14 to 53 μg/mL with high selective indices against normal WI-38 and MCF-10A cell lines. The increase in apoptosis was revealed by the overexpression of p53, BAX, and caspase-9 and the downregulation of antiapoptotic Bcl-2 mRNA and protein expressions. The results indicate that H. undatus extracts can be a plant source for cancer therapy.
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Affiliation(s)
- Hanin S. Salam
- College of Biotechnology, Misr University for Science and Technology, Giza 12563, Egypt
| | - Mohamed M. Tawfik
- Zoology Department, Faculty of Science, Port Said University, Port Said 42526, Egypt
| | - Mohamed R. Elnagar
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Al-Azhar University, Cairo 11823, Egypt
- Department of Pharmacology, College of Pharmacy, The Islamic University, Najaf 54001, Iraq
- Correspondence: (M.R.E.); (H.A.M.)
| | - Hamdoon A. Mohammed
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Qassim University, Buraydah 51452, Saudi Arabia
- Department of Pharmacognosy and Medicinal Plants, Faculty of Pharmacy, Al-Azhar University, Cairo 11823, Egypt
- Correspondence: (M.R.E.); (H.A.M.)
| | - Mohamed A. Zarka
- Department of Pharmacognosy, Faculty of Pharmacy, October University for Modern Sciences and Arts (MSA), 6th October City, Giza 12563, Egypt
- Department of Pharmacognosy, College of Pharmacy, The Islamic University, Najaf 54001, Iraq
| | - Nabil S. Awad
- College of Biotechnology, Misr University for Science and Technology, Giza 12563, Egypt
- Department of Genetics, Faculty of Agriculture and Natural Resources, Aswan University, Aswan 81528, Egypt
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6
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Elaidy SM, Tawfik MM, Ameen AM, Hassan WA, El Sherif I, Amin MK, Elkholy SE. Metformin alleviates the dysregulated testicular steroidogenesis and spermatogenesis induced by carbimazole in levothyroxine-primed rats. Life Sci 2022; 307:120904. [PMID: 36029850 DOI: 10.1016/j.lfs.2022.120904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/15/2022] [Accepted: 08/18/2022] [Indexed: 10/15/2022]
Abstract
Most of the published experiments about carbimazole (CMZ)-induced testicular injury are constructed in normal healthy animals, which lakes the translational identification. Despite metformin (MET) having advantageous effects on injured testicles, its impact on thyroid function is arguable. In the current levothyroxine (LT4)/CMZ model, Wistar rats were primed by LT4 for sixty days. CMZ was then given individually or simultaneously with different doses of MET, 100, 200, and 400 mg, daily for thirty days. Serum was assessed for thyroid profile panel, sex hormones, and gonadotropin levels. Testicular tissues were examined for steroidogenesis, spermatogenesis, inflammation, and apoptosis. Histopathology of thyroid and testes were examined, besides thyroidal nuclear factor (NF)-kB expression. MET in a dose-response manner improved the LT4/CMZ-induced testicular toxicity by increasing the steroidogenic acute regulatory protein (StAR), and 17-β-hydroxysteroid dehydrogenase (17βHSD) activities, the proliferating cell nuclear antigen (PCNA), sperm count and motility, sex hormones, and gonadotropin levels. MET-400 mg markedly decreased the elevated NF-kB expressions, tumour necrosis factor (TNF)-α, caspase-3, and BAX, and increased BCL-2. LT4/CMZ could be used as translational animal modelling. MET displayed a dose-dependent ameliorative effect on the LT4/CMZ model without significant harmful effects on thyroid functions. MET-testicular protective roles in diabetics with thyroidal diseases should be explored.
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Affiliation(s)
- Samah M Elaidy
- Department of Clinical Pharmacology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt.
| | - Mohamed M Tawfik
- Zoology Department, Faculty of Science, Port Said University, Port Said, Egypt
| | - Angie M Ameen
- Department of Physiology, Faculty of Medicine, Suez Canal University, 41522 Ismailia, Egypt
| | - Wael Abdou Hassan
- Department of Pathology, Faculty of Medicine, Suez Canal University, 41522 Ismailia, Egypt; Department of Basic Sciences, College of Medicine, Suliman Al Rajhi University, the Kingdom of Saudi Arabia
| | - Iman El Sherif
- Department of Internal Medicine, Faculty of Medicine, Suez Canal University, 41522 Ismailia, Egypt
| | - Mona Karem Amin
- Department of Pediatrics, Faculty of Medicine, Suez Canal University, 41522 Ismailia, Egypt
| | - Shereen E Elkholy
- Department of Clinical Pharmacology, Faculty of Medicine, Portsaid University, Portsaid, Egypt
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7
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Tawfik MM, Eissa N, Althobaiti F, Fayad E, Abu Almaaty AH. Nomad Jellyfish Rhopilema nomadica Venom Induces Apoptotic Cell Death and Cell Cycle Arrest in Human Hepatocellular Carcinoma HepG2 Cells. Molecules 2021; 26:molecules26175185. [PMID: 34500621 PMCID: PMC8434601 DOI: 10.3390/molecules26175185] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/16/2021] [Accepted: 08/17/2021] [Indexed: 12/18/2022] Open
Abstract
Jellyfish venom is a rich source of bioactive proteins and peptides with various biological activities including antioxidant, antimicrobial and antitumor effects. However, the anti-proliferative activity of the crude extract of Rhopilema nomadica jellyfish venom has not been examined yet. The present study aimed at the investigation of the in vitro effect of R. nomadica venom on liver cancer cells (HepG2), breast cancer cells (MDA-MB231), human normal fibroblast (HFB4), and human normal lung cells (WI-38) proliferation by using MTT assay. The apoptotic cell death in HepG2 cells was investigated using Annexin V-FITC/PI double staining-based flow cytometry analysis, western blot analysis, and DNA fragmentation assays. R. nomadica venom displayed significant dose-dependent cytotoxicity on HepG2 cells after 48 h of treatment with IC50 value of 50 μg/mL and higher toxicity (3:5-fold change) against MDA-MB231, HFB4, and WI-38 cells. R. nomadica venom showed a prominent increase of apoptosis as revealed by cell cycle arrest at G2/M phase, upregulation of p53, BAX, and caspase-3 proteins, and the down-regulation of anti-apoptotic Bcl-2 protein and DNA fragmentation. These findings suggest that R. nomadica venom induces apoptosis in hepatocellular carcinoma cells. To the best of the authors' knowledge, this is the first scientific evidence demonstrating the induction of apoptosis and cell cycle arrest of R. nomadica jellyfish venom.
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Affiliation(s)
- Mohamed M. Tawfik
- Department of Zoology, Faculty of Science, Port Said University, Port Said 42526, Egypt; (N.E.); (A.H.A.A.)
- Correspondence: (M.M.T.); (E.F.)
| | - Nourhan Eissa
- Department of Zoology, Faculty of Science, Port Said University, Port Said 42526, Egypt; (N.E.); (A.H.A.A.)
| | - Fayez Althobaiti
- Department of Biotechnology, Faculty of Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Eman Fayad
- Department of Biotechnology, Faculty of Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
- Correspondence: (M.M.T.); (E.F.)
| | - Ali H. Abu Almaaty
- Department of Zoology, Faculty of Science, Port Said University, Port Said 42526, Egypt; (N.E.); (A.H.A.A.)
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Sieda B, Tawfik MM, Khatur H. Is routine dissection of central lymph node and radio-active iodine therapy, necessary for papillary thyroid carcinoma, T1-2 N0? A randomized controlled trial. International Journal of Surgery Open 2020. [DOI: 10.1016/j.ijso.2020.05.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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9
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Abdel-Ghani LM, Rahmy TR, Tawfik MM, Kaziri I, Al-Obaidi A, Rowan EG, Plevin R, Abdel-Rahman MA. Cytotoxicity of Nubein6.8 peptide isolated from the snake venom of Naja nubiae on melanoma and ovarian carcinoma cell lines. Toxicon 2019; 168:22-31. [PMID: 31233771 DOI: 10.1016/j.toxicon.2019.06.220] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 02/05/2019] [Revised: 05/15/2019] [Accepted: 06/20/2019] [Indexed: 12/24/2022]
Abstract
This study was conducted to examine the cytotoxic effects of Nubein6.8 isolated from the venom of the Egyptian Spitting Cobra Naja nubiae on melanoma (A375) and ovarian carcinoma cell lines and to reveal its mode of action. The size of Nubein6.8 (6801.8 Da) and its N-terminal sequence are similar to cytotoxins purified from the venom of other spitting cobras. Nubein6.8 showed a high significant cytotoxic effect on A375 cell line and moderate effect on A2780. A clonogenic assay showed that Nubein6.8 has a significant long-term potency on A375 cell survival when compared to A2780. The molecular intracellular signaling pathways of Nubein6.8 have been investigated using Western blotting analysis, flow cytometry, and microscale protein labeling. This data revealed that Nubein6.8 has DNA damaging effects and the ability to activate apoptosis in both tumor cell lines. Cellular uptake recordings revealed that the labeled-Nubein6.8 was intracellularly present in A375 cells while A2780 displayed resistance against it. SEM examination showed that Nubein6.8 was found to have high accessibility to malignant melanoma cells. The apoptotic effect of Nubein6.8 was confirmed by TEM examination that revealed many evident characteristics for Nubein6.8 apoptotic efficacy on A375 cell sections. Also, TEM reflected many resistant characteristics that faced Nubein6.8 acquisition through ovarian carcinoma cell sections. Accordingly, the snake venom peptide of Nubein6.8 is a promising template for developing potential cytotoxic agents targeting human melanoma and ovarian carcinoma.
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Affiliation(s)
- Lougin M Abdel-Ghani
- Zoology Department, Faculty of Science, Suez Canal University, Ismailia, 41522, Egypt
| | - Tarek R Rahmy
- Zoology Department, Faculty of Science, Suez Canal University, Ismailia, 41522, Egypt
| | - Mohamed M Tawfik
- Zoology Department, Faculty of Science, Port Said University, Port Said, Egypt
| | - Ibtisam Kaziri
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK
| | - Ahlam Al-Obaidi
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK
| | - Edward G Rowan
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK
| | - Robin Plevin
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK
| | - Mohamed A Abdel-Rahman
- Zoology Department, Faculty of Science, Suez Canal University, Ismailia, 41522, Egypt; Institute of Biotechnology for Graduate Studies and Research, Suez Canal University, Ismailia, 41522, Egypt.
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10
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Tawfik MM, Elrefaey AA, Abdelkhalek M, Makroum AA. Ultrasound-guided spinal anesthesia for cesarean section in a parturient with spinal metastases. J Clin Monit Comput 2016; 30:857-858. [PMID: 26410409 DOI: 10.1007/s10877-015-9785-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 06/11/2015] [Accepted: 09/24/2015] [Indexed: 10/23/2022]
Abstract
Preprocedural spinal ultrasound appears to decrease the failure rate and complications of neuraxial anesthesia compared to the conventional landmark technique. It is especially beneficial in difficult cases where conventional palpation technique may fail. We recently encountered a parturient with multiple lumbar and cervical spinal metastatic lesions presenting for cesarean section in the third trimester. We used spinal ultrasound to define the appropriate intervertebral space and measure the distance to the ligamentum flavum-dura mater complex. This greatly helped in administering a safe spinal anesthetic and avoiding general anesthesia which might have been hazardous in this patient.
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Affiliation(s)
- Mohamed M Tawfik
- Department of Anesthesia and Surgical Intensive Care, Mansoura University Hospitals, Mansoura, Egypt.
| | - Ahmed A Elrefaey
- Department of Anesthesia and Surgical Intensive Care, Mansoura University Hospitals, Mansoura, Egypt
| | - Mostafa Abdelkhalek
- Department of Anesthesia and Surgical Intensive Care, Mansoura University Hospitals, Mansoura, Egypt
| | - Amany A Makroum
- Department of Obstetrics and Gynecology, Mansoura University Hospitals, Mansoura, Egypt
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11
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Harrison PL, Abdel-Rahman MA, Strong PN, Tawfik MM, Miller K. Characterisation of three alpha-helical antimicrobial peptides from the venom of Scorpio maurus palmatus. Toxicon 2016; 117:30-6. [PMID: 27019370 DOI: 10.1016/j.toxicon.2016.03.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [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: 12/18/2015] [Revised: 03/04/2016] [Accepted: 03/23/2016] [Indexed: 11/19/2022]
Abstract
Scorpion venoms provide a rich source of anti-microbial peptides. Here we characterise three from the venom of Scorpion maurus palmatus. Smp13 is biologically inactive, despite sharing homology with other antimicrobial peptides, probably because it lacks a typically charged structure. Both Smp-24 and Smp-43 have broad spectrum antimicrobial activity, disrupting bacterial membranes. In addition, there is evidence that Smp24 may inhibit DNA synthesis in Bacillus subtilis. Smp24 haemolysed red blood cells but in contrast, Smp43 was non-haemolytic. The introduction of a flexible Gly-Val-Gly hinge into the middle of Smp24 did not alter the haemolytic activity of Smp24 (as might have been predicted from earlier studies with Pandinin2 (Pin2), although C-terminal truncation of Smp-24 reduced its haemolytic activity, in agreement with earlier Pin 2 studies. Smp24 and its derivatives, as well as Smp-43, were all cytotoxic (ATP release assay) toward mammalian HepG2 liver cells. Our results highlight the beneficial effect of helical-hinge-helical conformation on promoting prokaryotic selectivity of long chain scorpion AMPs, as well as the importance of examining a wide range of mammalian cell types in cytotoxicity testing.
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Affiliation(s)
- Patrick L Harrison
- Biomedical Research Centre, Biosciences Division, Sheffield Hallam University, Sheffield, UK
| | | | - Peter N Strong
- Biomedical Research Centre, Biosciences Division, Sheffield Hallam University, Sheffield, UK
| | - Mohamed M Tawfik
- Biomedical Research Centre, Biosciences Division, Sheffield Hallam University, Sheffield, UK
| | - Keith Miller
- Biomedical Research Centre, Biosciences Division, Sheffield Hallam University, Sheffield, UK.
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Tawfik MM, Tarbay AI, Abdelkhalek M. Cesarean section in parturients with uncorrected tetralogy of Fallot. Int J Obstet Anesth 2015; 24:191-2. [PMID: 25680700 DOI: 10.1016/j.ijoa.2014.12.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Revised: 12/24/2014] [Accepted: 12/29/2014] [Indexed: 11/18/2022]
Affiliation(s)
- M M Tawfik
- Department of Anesthesia and Surgical Intensive Care, Mansoura University Hospitals, Mansoura, Egypt.
| | - A I Tarbay
- Department of Anesthesia and Surgical Intensive Care, Mansoura University Hospitals, Mansoura, Egypt
| | - M Abdelkhalek
- Department of Anesthesia and Surgical Intensive Care, Mansoura University Hospitals, Mansoura, Egypt
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13
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Saleh HM, Gabr AK, Tawfik MM, Abouellail H. Prospective, randomized study of cutting balloon angioplasty versus conventional balloon angioplasty for the treatment of hemodialysis access stenoses. J Vasc Surg 2014; 60:735-40. [DOI: 10.1016/j.jvs.2014.04.002] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Accepted: 04/02/2014] [Indexed: 11/16/2022]
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14
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Tawfik MM, Taman ME, Motawea AA, Abdel-Hady E. Thrombolysis for the management of massive pulmonary embolism in pregnancy. Int J Obstet Anesth 2013; 22:149-52. [PMID: 23481414 DOI: 10.1016/j.ijoa.2012.12.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Revised: 11/30/2012] [Accepted: 12/30/2012] [Indexed: 10/27/2022]
Abstract
Massive pulmonary embolism in pregnancy is a major cause of maternal mortality; the management is challenging, and often requires aggressive therapy. Thrombolysis has been used, often with favorable outcome, but has not been previously reported in a patient presenting with an intrauterine death. We present a 29-year-old nulliparous patient who had a massive pulmonary embolus associated with fetal death in the third trimester of pregnancy. Diagnosis of pulmonary embolus was aided by transthoracic echocardiography and the patient was successfully treated with streptokinase.
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Affiliation(s)
- M M Tawfik
- Department of Anesthesia and Surgical Intensive Care, Mansoura University Hospitals, Mansoura, Egypt.
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Mamdouh HM, Ismail HM, Kharboush IF, Tawfik MM, El Sharkawy OG, Abdel-Baky M, Sallam HN. Prevalence and risk factors for spousal violence among women attending health care centres in Alexandria, Egypt. East Mediterr Health J 2013; 18:1118-26. [PMID: 23301374 DOI: 10.26719/2012.18.11.1118] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We conducted a cross-sectional survey to determine the prevalence of, and factors affecting, spousal violence among 3271 ever-married women attending 12 randomly selected family health centres in Alexandria Governorate. More than three-quarters of the participants (77%) reported experiencing spousal violence during their marital life. Emotional violence was the most common type reported (71.0%), followed by physical (50.3%), economic (40.8%) and sexual (37.1%) violence. The study confirms the high prevalence of spousal violence across all socioeconomic strata. Logistic regression analysis indicated large family size, divorce or separation, low educational attainment of husband, smoking habit and drug use in husband, husband's psychological status and history of exposure to physical violence during adolescence were associated with spousal violence. This high rate of spousal violence highlights the urgent need for government and civil society to address the issue, which hinders progress toward Egypt's development goals.
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Affiliation(s)
- H M Mamdouh
- Alexandria Regional Centre for Women's Health and Development, University of Alexandria, Alexandria, Egypt.
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