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Alsaadi D, Low D, Osman A, Mcmonagle M. Use of jejunal serosal patch and pyloric exclusion in the management of complex duodenal injury. Ann R Coll Surg Engl 2024; 106:413-417. [PMID: 38445581 PMCID: PMC11060854 DOI: 10.1308/rcsann.2023.0074] [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] [Accepted: 09/18/2023] [Indexed: 03/07/2024] Open
Abstract
BACKGROUND Duodenal injuries are relatively rare but remain a management challenge with a high incidence of postoperative complications. Guidelines from the World Society of Emergency Surgery and American Association for the Surgery of Trauma favour a primary repair for less-complex injuries, but the management of more complex duodenal trauma remains controversial with varying techniques supported, including pyloric exclusion, omental or jejunal patch closure, gastrojejunostomy and pancreatoduodenectomy. We describe the techniques used in one case of complex duodenal trauma. TECHNIQUE The duodenum is approached via a standard laparotomy with Kocherisation. Primary repair of the duodenal perforations is performed using a 3/0 polydioxanone suture (PDS), followed by mobilisation of a loop of mid-jejunum against the area of duodenal trauma over the primary repair as a jejunal serosal patch. The antimesenteric jejunal serosal border is sutured to the serosa of the duodenum (serosa only) using a 3/0 PDS. Pyloric exclusion is then performed through an anterior gastrostomy, to control the volume of gastric juice entering the duodenum. The pylorus is sutured closed using an absorbable suture followed by closure of the anterior gastrostomy using a GIA stapling device.
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Affiliation(s)
- D Alsaadi
- University Hospital Waterford, Ireland
| | - D Low
- University of Pennsylvania, USA
| | - A Osman
- Saint Luke’s General Hospital, Kilkenny, Ireland
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2
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Osman A, Patel S, Gonsalves M, Renani S, Morgan R. Vascular Interventions in Oncology. Clin Oncol (R Coll Radiol) 2023:S0936-6555(23)00311-4. [PMID: 37805354 DOI: 10.1016/j.clon.2023.09.005] [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: 03/06/2023] [Revised: 07/21/2023] [Accepted: 09/13/2023] [Indexed: 10/09/2023]
Abstract
Vascular interventions are an important and established tool in the management of the oncology patient. The goal of these procedures may be curative, palliative or adjunctive in nature. Some of the common vascular interventions used in oncology include transarterial embolisation or chemoembolisation, selective internal radiation therapy, chemosaturation, venous access lines, superior vena cava stenting and portal vein embolisation. We provide an overview of the principles, technology and approach of vascular techniques for tumour therapy in both the arterial and venous systems. Arterial interventions are currently mainly used in the management of hepatocellular carcinoma. Transarterial embolisation, chemoembolisation and selective internal radiation therapy deliver targeted catheter-delivered treatments with the aim of reducing tumour burden, controlling tumour growth or increasing survival in patients not eligible for transplantation. Chemosaturation is a regional chemotherapy technique that delivers high doses of chemotherapy directly to the liver via the hepatic artery, while reducing the risks of systemic effects. Venous interventions are more adjunctive in nature. Venous access lines are used to provide a means of delivering chemotherapy and other medications directly into the bloodstream. Superior vena cava stenting is a palliative procedure that is used to relieve symptoms of superior vena cava obstruction. Portal vein embolisation is a procedure that allows hypertrophy of a healthy portion of the liver in preparation for liver resection. Interventional radiology-led vascular interventions play an essential part of cancer management. These procedures are minimally invasive and provide a safe and effective adjunct to traditional cancer treatment methods. Appropriate work-up and discussion of each patient-specific problem in a multidisciplinary setting with interventional radiology is essential to provide optimum patient-centred care.
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Affiliation(s)
- A Osman
- St George's Hospital University Hospitals NHS Foundation Trust, London, UK.
| | - S Patel
- St George's Hospital University Hospitals NHS Foundation Trust, London, UK
| | - M Gonsalves
- St George's Hospital University Hospitals NHS Foundation Trust, London, UK
| | - S Renani
- St George's Hospital University Hospitals NHS Foundation Trust, London, UK
| | - R Morgan
- St George's Hospital University Hospitals NHS Foundation Trust, London, UK
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Imbabi T, Hassan A, Ahmed-Farid O, El-Garhy O, Sabeq I, Moustafa M, Mohammadein A, Hassan N, Osman A, Sitohy M. Corrigendum to "Supplementing rabbit diets with butylated hydroxyanisole affects oxidative stress, growth performance, and meat quality" [Animal 15(9) (2021) 100339]. Animal 2023; 17:100859. [PMID: 37451744 DOI: 10.1016/j.animal.2023.100859] [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: 07/18/2023] Open
Affiliation(s)
- T Imbabi
- Animal Production Department, Faculty of Agriculture, Benha University, Moshtohor 13736, Egypt
| | - A Hassan
- Department of Biotechnology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - O Ahmed-Farid
- Department of Physiology, National Organization for Drug Control and Research, Giza 12553, Egypt
| | - O El-Garhy
- Animal Production Department, Faculty of Agriculture, Benha University, Moshtohor 13736, Egypt
| | - I Sabeq
- Department of Food Hygiene, Faculty of Veterinary Medicine, Benha University, Moshtohor 13736, Egypt
| | - M Moustafa
- Genetics and Genetic Engineering Department, Faculty of Agriculture, Benha University, Moshtohor 13736, Egypt(1)
| | - A Mohammadein
- Department of Biology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - N Hassan
- Department of Biology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - A Osman
- Biochemistry Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt.
| | - M Sitohy
- Biochemistry Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt.
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Imbabi T, El-Garhy O, Moustafa M, Sabeq I, Osman A, Sitohy M, Refaat M, Samir A, Abdel Moneim U, El-Badawy M, Abbass A. Author reply to the expression of concern on "Supplementing rabbit diets with butylated hydroxyanisole affects oxidative stress, growth performance, and meat quality" [Animal 16(9) (2021) 100339]. Animal 2023:100868. [PMID: 37357091 DOI: 10.1016/j.animal.2023.100868] [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: 06/27/2023] Open
Affiliation(s)
- T Imbabi
- Faculty of Agriculture, Benha University, Moshtohor 13736, Egypt
| | - O El-Garhy
- Faculty of Agriculture, Benha University, Moshtohor 13736, Egypt
| | - M Moustafa
- Faculty of Agriculture, Benha University, Moshtohor 13736, Egypt
| | - I Sabeq
- Faculty of Veterinary Medicine, Benha University, Moshtohor 13736, Egypt
| | - A Osman
- Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
| | - M Sitohy
- Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt.
| | - M Refaat
- Vice-Dean for Postgraduate and Research Affairs & Ethics Committees, Benha University, Moshtohor 13736, Egypt
| | - A Samir
- Vice-Dean for Postgraduate and Research Affairs, Benha University, Moshtohor 13736, Egypt
| | - U Abdel Moneim
- Dean of Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
| | - M El-Badawy
- Dean of Faculty of Agriculture, Benha University, Moshtohor 13736, Egypt
| | - A Abbass
- Dean of Faculty of Veterinary Medicine, Benha University, Moshtohor 13736, Egypt
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Yu W, Chen Y, Putluri N, Osman A, Coarfa C, Putluri V, Kamal AHM, Asmussen JK, Katsonis P, Myers JN, Lai SY, Lu W, Stephan CC, Powell RT, Johnson FM, Skinner HD, Kazi J, Ahmed KM, Hu L, Threet A, Meyer MD, Bankson JA, Wang T, Davis J, Parker KR, Harris MA, Baek ML, Echeverria GV, Qi X, Wang J, Frederick AI, Walsh AJ, Lichtarge O, Frederick MJ, Sandulache VC. Evolution of cisplatin resistance through coordinated metabolic reprogramming of the cellular reductive state. Br J Cancer 2023; 128:2013-2024. [PMID: 37012319 PMCID: PMC10205814 DOI: 10.1038/s41416-023-02253-7] [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: 08/16/2022] [Revised: 03/16/2023] [Accepted: 03/21/2023] [Indexed: 04/05/2023] Open
Abstract
BACKGROUND Cisplatin (CDDP) is a mainstay treatment for advanced head and neck squamous cell carcinomas (HNSCC) despite a high frequency of innate and acquired resistance. We hypothesised that tumours acquire CDDP resistance through an enhanced reductive state dependent on metabolic rewiring. METHODS To validate this model and understand how an adaptive metabolic programme might be imprinted, we performed an integrated analysis of CDDP-resistant HNSCC clones from multiple genomic backgrounds by whole-exome sequencing, RNA-seq, mass spectrometry, steady state and flux metabolomics. RESULTS Inactivating KEAP1 mutations or reductions in KEAP1 RNA correlated with Nrf2 activation in CDDP-resistant cells, which functionally contributed to resistance. Proteomics identified elevation of downstream Nrf2 targets and the enrichment of enzymes involved in generation of biomass and reducing equivalents, metabolism of glucose, glutathione, NAD(P), and oxoacids. This was accompanied by biochemical and metabolic evidence of an enhanced reductive state dependent on coordinated glucose and glutamine catabolism, associated with reduced energy production and proliferation, despite normal mitochondrial structure and function. CONCLUSIONS Our analysis identified coordinated metabolic changes associated with CDDP resistance that may provide new therapeutic avenues through targeting of these convergent pathways.
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Affiliation(s)
- Wangie Yu
- Bobby R. Alford Department of Otolaryngology Head and Neck Surgery, Baylor College of Medicine, Houston, TX, USA
| | - Yunyun Chen
- Department of Head and Neck Surgery, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Nagireddy Putluri
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Abdullah Osman
- Department of Head and Neck Surgery, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Cristian Coarfa
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
- Center for Precision Environmental Health, Baylor College of Medicine, Houston, TX, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA
| | - Vasanta Putluri
- Advanced Technology core, Dan Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA
| | - Abu H M Kamal
- Advanced Technology core, Dan Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA
| | - Jennifer Kay Asmussen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Panagiotis Katsonis
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Jeffrey N Myers
- Department of Head and Neck Surgery, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Stephen Y Lai
- Department of Head and Neck Surgery, University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Department of Molecular and Cellular Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Wuhao Lu
- Bobby R. Alford Department of Otolaryngology Head and Neck Surgery, Baylor College of Medicine, Houston, TX, USA
| | - Clifford C Stephan
- Institute of Biosciences and Technology, Texas A&M Health Science Center, Houston, TX, USA
- Department of Translational Medical Sciences, School of Medicine, Texas A&M University, Houston, TX, USA
| | - Reid T Powell
- Institute of Biosciences and Technology, Texas A&M Health Science Center, Houston, TX, USA
- Department of Translational Medical Sciences, School of Medicine, Texas A&M University, Houston, TX, USA
| | - Faye M Johnson
- Department of Thoracic Head and Neck Medical Oncology, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Heath D Skinner
- Department of Radiation Oncology, UPMC Hillman Cancer Center, Pittsburgh, PA, USA
| | - Jawad Kazi
- Bobby R. Alford Department of Otolaryngology Head and Neck Surgery, Baylor College of Medicine, Houston, TX, USA
| | - Kazi Mokim Ahmed
- Bobby R. Alford Department of Otolaryngology Head and Neck Surgery, Baylor College of Medicine, Houston, TX, USA
| | - Linghao Hu
- Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Addison Threet
- Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Matthew D Meyer
- Shared Equipment Authority, Rice University, Houston, TX, USA
| | - James A Bankson
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Tony Wang
- Bobby R. Alford Department of Otolaryngology Head and Neck Surgery, Baylor College of Medicine, Houston, TX, USA
| | - Jack Davis
- Bobby R. Alford Department of Otolaryngology Head and Neck Surgery, Baylor College of Medicine, Houston, TX, USA
| | - Kirby R Parker
- Bobby R. Alford Department of Otolaryngology Head and Neck Surgery, Baylor College of Medicine, Houston, TX, USA
| | - Madison A Harris
- Bobby R. Alford Department of Otolaryngology Head and Neck Surgery, Baylor College of Medicine, Houston, TX, USA
| | - Mokryun L Baek
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX, USA
- Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Gloria V Echeverria
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX, USA
- Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Xiaoli Qi
- Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX, USA
| | - Jin Wang
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
- Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX, USA
| | - Andy I Frederick
- School of Electrical and Computer Engineering Undergraduate Department, Cornell University, NY, USA
| | - Alex J Walsh
- Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Olivier Lichtarge
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
- Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX, USA
- Department of Biochemistry & Molecular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX, USA
- Program in Quantitative and Computational Biosciences, Baylor College of Medicine, One Baylor Plaza, Houston, TX, USA
- Program in Integrative Molecular and Biomedical Sciences, Baylor College of Medicine, One Baylor Plaza, Houston, TX, USA
- Computational and Integrative Biomedical Research Center, Baylor College of Medicine, One Baylor Plaza, Houston, TX, USA
| | - Mitchell J Frederick
- Bobby R. Alford Department of Otolaryngology Head and Neck Surgery, Baylor College of Medicine, Houston, TX, USA.
| | - Vlad C Sandulache
- Bobby R. Alford Department of Otolaryngology Head and Neck Surgery, Baylor College of Medicine, Houston, TX, USA.
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA.
- Center for Translational Research on Inflammatory Diseases, Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX, USA.
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Hasan AA, Ahmad SZ, Osman A. Transformational leadership and work engagement as mediators on nurses' job performance in healthcare clinics: work environment as a moderator. Leadersh Health Serv (Bradf Engl) 2023; ahead-of-print. [PMID: 37093237 DOI: 10.1108/lhs-10-2022-0097] [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] [Indexed: 04/25/2023]
Abstract
PURPOSE This study aims to investigate the mediating effect of transformational leadership (TL) and work engagement (WE) on health-care clinic nurses' performance and the crucial role of these variables in the work environment (WEV). DESIGN/METHODOLOGY/APPROACH Data were collected from 353 nurses working across various health-care clinics in the United Arab Emirates. This study used descriptive correlational statistics from the Statistical Package for the Social Sciences, the Pearson correlation coefficient, confirmatory factor analysis for model validity, Cronbach's alpha for reliability and path analysis to determine the results. FINDINGS The relationship between TL and job performance among nurses in health-care clinics was strongly influenced by WE. In addition, a moderate WEV increased the positive influence of TL on job accomplishment. Furthermore, there were no statistically significant differences between the participants' demographics characteristics and the main variables of the study. PRACTICAL IMPLICATIONS Health-care management can support and enhance nurses' job performance through TL, create a more structured WEV and support WE. ORIGINALITY/VALUE This study involves a specific investigation into WE as a mediator, WEV as a moderator and the effect of TL on nurses' job performance.
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Affiliation(s)
- Amal Abdullah Hasan
- Management Department, College of Business, Abu Dhabi University, Abu Dhabi, United Arab Emirates
| | - Syed Zamberi Ahmad
- Management Department, College of Business, Abu Dhabi University, Abu Dhabi, United Arab Emirates
| | - Abdullah Osman
- Management Department, College of Business, Abu Dhabi University, Abu Dhabi, United Arab Emirates
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Aishah A, Tong B, Osman A, Donegan M, Pitcher G, Kwan B, Brown L, Altree T, Adams R, Mukherjee S, Eckert D. Targeted combination therapy based on endotypes resolves obstructive sleep apnoea. Sleep Med 2022. [DOI: 10.1016/j.sleep.2022.05.753] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Buchholtz N, Hermans L, Umunnakwe C, De Jong T, Osman A, Symons J, Tempelman H, Wensing A, Nijhuis M. PP 3.8 – 00137 Characterization of the HIV-1 subtype C reservoir during ART in South-African men and women. J Virus Erad 2022. [DOI: 10.1016/j.jve.2022.100188] [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: 12/24/2022] Open
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Karattuparambil J, Anchal J, Osman A, Srinivasan L. ERECTOR SPINAE PLANE BLOCK CATHETER: A GOAL STANDARD FOR THORACIC ANAESTHESIA? J Cardiothorac Vasc Anesth 2022. [DOI: 10.1053/j.jvca.2022.09.028] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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10
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Wijetunga N, Goglia A, Weinhold N, Cislo M, Berger M, Osman A, Pentsova E, Miller A, Powell S, Boire A, Yang J. The Dynamic Mutational Landscape of Cerebrospinal Fluid Circulating Tumor DNA can Predict Survival after Proton Craniospinal Irradiation for Leptomeningeal Metastasis. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.374] [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: 10/31/2022]
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11
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Osman A, Crowley J, Gordon GSD. Training generative adversarial networks for optical property mapping using synthetic image data. Biomed Opt Express 2022; 13:5171-5186. [PMID: 36425623 PMCID: PMC9664886 DOI: 10.1364/boe.458554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 06/13/2022] [Accepted: 06/13/2022] [Indexed: 06/16/2023]
Abstract
We demonstrate the training of a generative adversarial network (GAN) for the prediction of optical property maps (scattering and absorption) using spatial frequency domain imaging (SFDI) image data sets that are generated synthetically with a free open-source 3D modelling and rendering software, Blender. The flexibility of Blender is exploited to simulate 5 models with real-life relevance to clinical SFDI of diseased tissue: flat samples containing a single material, flat samples containing 2 materials, flat samples containing 3 materials, flat samples with spheroidal tumours and cylindrical samples with spheroidal tumours. The last case is particularly relevant as it represents wide-field imaging inside a tubular organ e.g. the gastro-intestinal tract. In all 5 scenarios we show the GAN provides an accurate reconstruction of the optical properties from single SFDI images with a mean normalised error ranging from 1.0-1.2% for absorption and 1.1%-1.2% for scattering, resulting in visually improved contrast for tumour spheroid structures. This compares favourably with the ∼10% absorption error and ∼10% scattering error achieved using GANs on experimental SFDI data. Next, we perform a bi-directional cross-validation of our synthetically-trained GAN, retrained with 90% synthetic and 10% experimental data to encourage domain transfer, with a GAN trained fully on experimental data and observe visually accurate results with an error of 6.3%-10.3% for absorption and 6.6%-11.9% for scattering. Our synthetically trained GAN is therefore highly relevant to real experimental samples but provides the significant added benefits of large training datasets, perfect ground-truths and the ability to test realistic imaging geometries, e.g. inside cylinders, for which no conventional single-shot demodulation algorithms exist. In the future, we expect that the application of techniques such as domain adaptation or training on hybrid real-synthetic datasets will create a powerful tool for fast, accurate production of optical property maps for real clinical imaging systems.
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Affiliation(s)
- A Osman
- Optics and Photonics Group, Faculty of Engineering, The University of Nottingham, Nottingham, United Kingdom
| | - J Crowley
- Optics and Photonics Group, Faculty of Engineering, The University of Nottingham, Nottingham, United Kingdom
| | - G S D Gordon
- Optics and Photonics Group, Faculty of Engineering, The University of Nottingham, Nottingham, United Kingdom
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12
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Mohamed S, Patel AJ, Mazhar K, Osman A, Balacumaraswami L, Ridley P. Native pulmonary valve endocarditis requiring pulmonary valve replacement in adulthood: a case series. J Surg Case Rep 2022; 2022:rjac137. [PMID: 35444791 PMCID: PMC9015772 DOI: 10.1093/jscr/rjac137] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 03/14/2022] [Indexed: 11/13/2022] Open
Abstract
Native pulmonary valve endocarditis is a rare phenomenon as native valve endocarditis tends to typically affect the left sided heart valves. However, the right-sided heart valves can be affected in patients with a history of intravenous drug use, whereby the tricuspid valve is most commonly affected. We present two cases who were diagnosed with native pulmonary valve endocarditis in the absence of congenital heart disease. In the first case, the native pulmonary valve endocarditis was probably a derivative of compounding factors of an enlarged underlying pulmonary artery and staphylococcal bacteraemia. In the second case, a common causal organism of native valve endocarditis following dental treatment and the resultant echocardiography findings was of significant interest. In summary, native pulmonary valve endocarditis is relatively rare complication in the adult population, especially in the absence of congenital heart disease.
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Affiliation(s)
- S Mohamed
- Department of Cardiothoracic Surgery, Royal Stoke University Hospital, Stoke on Trent, UK
| | - A J Patel
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham B15 2TT, UK
| | - K Mazhar
- Department of Cardiothoracic Surgery, Royal Stoke University Hospital, Stoke on Trent, UK
| | - A Osman
- Department of Cardiothoracic Surgery, Royal Stoke University Hospital, Stoke on Trent, UK
| | - L Balacumaraswami
- Department of Cardiothoracic Surgery, Royal Stoke University Hospital, Stoke on Trent, UK
| | - P Ridley
- Department of Cardiothoracic Surgery, Royal Stoke University Hospital, Stoke on Trent, UK
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13
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Gus'kov AV, Oleinikov AA, Domashkevich NS, Osman A. [Possibilities and prospects for experimental and clinical instrumentation techniques for determining the primary stability of dental implants in comparative analysis]. Stomatologiia (Mosk) 2022; 101:96-102. [PMID: 35184542 DOI: 10.17116/stomat202210101196] [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: 06/14/2023]
Abstract
The high primary stability of dental implants provides a favorable prognosis for orthopedic treatment with implant-supported structures. The importance of assessing the stability and the bone tissue surrounding the implant as a whole is due to the fact that the process of osseointegration is a structural and functional connection between the bone and the loaded surface of the implant. Determination of the dynamics of the stability of dental implants allows timely monitoring of unpredictable changes at the stages of osseointegration and remodeling of bone tissue around the implant. Currently, in addition to clinical and radiation diagnostic methods, there are generally recognized by clinicians frequency resonance analysis and periotestometry. However, there are some scientific discrepancies indicating the lack of objectivity of these methods and the impossibility of their full-fledged application without the support of radiation and clinical diagnostic methods. In addition to these methods, there are many experimental and less common methods in clinical practice for assessing the primary stability of implants, but with reasonable objectivity. Thus, the reasons are given that for a full assessment of the relationship between the efforts exerted on implants and their movements in the space of bone tissue, devices are needed that reflect the stability and density of the contact of the implant with bone tissue in physical quantities. In particular, methods based on lasers, sound, quantitative ultrasound, and others have found experimental practical application. The ultrasound method of assessing the primary stability of the implant is estimated as the most promising, since it allows you to demonstrate the results of studies in certain physical quantities, as well as to compare these results with histomorphological indicators of osseointegration of dental implants.
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Affiliation(s)
- A V Gus'kov
- Ryazan State Medical University, Ryazan, Russia
| | | | | | - A Osman
- Ryazan State Medical University, Ryazan, Russia
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14
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Aslam Joiya S, Farquhar J, Buck J, Osman A. 1585 The “6Pm Series” Addressing Medical Education for Final Year Medical Students During the Pandemic. Br J Surg 2021. [DOI: 10.1093/bjs/znab259.912] [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: 11/14/2022]
Abstract
Abstract
Aim
Free clinical teaching online delivered by NHS junior doctors to address a drop in face-to-face teaching.
Method
We created a block-based syllabus of topics that are commonly examined and created an SBA format series of online lectures. The lectures were delivered online and the lectures were carried out by NHS doctors. We delivered 30 continuous lectures in a 30-day period that covered a variety of topics. Each lecture lasted between 45 to 60 minutes and featured real time interactive mcqs which the students had a limited time to answer to simulate exam conditions. We also maintained a unique conference like format where the lecture provider would also be assisted by a ‘host' who would provide an environment that simulated a real-life lecture with a back-and-forth conversation. Lastly each session was reinforced with a feedback survey at the end which helped us improve our service but also provided key indicators on the needs of the audience.
Results
We were able to provide a series of lectures that on average had a viewership of 120-150 attendees per lecture and grew a social media following of 3500 people. Although the following on social media is not a full reflection of our reach. A good indication is our prescribing safety assessment series which attracted over 2000 people interested and 260 confirmed for one event.
Conclusions
We feel that the format we followed in delivering medical teaching provided a very effective format and we hope to continue this into the future.
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Affiliation(s)
| | - J Farquhar
- Yeovil District Hospital, Yeovil, United Kingdom
| | - J Buck
- Kings College London, London, United Kingdom
| | - A Osman
- Royal Cornwall Hospital, Truro, United Kingdom
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15
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Imbabi T, Hassan A, Ahmed-Farid O, El-Garhy O, Sabeq I, Moustafa M, Mohammadein A, Hassan N, Osman A, Sitohy M. Supplementing rabbit diets with butylated hydroxyanisole affects oxidative stress, growth performance, and meat quality. Animal 2021; 15:100339. [PMID: 34425485 DOI: 10.1016/j.animal.2021.100339] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 07/18/2021] [Accepted: 07/22/2021] [Indexed: 11/19/2022] Open
Abstract
Butylated hydroxyanisole (BHA) is a synthetic antioxidant analogous of vitamin E. It is used as a preservative to prevent free radical-mediated oxidation in high-fat foods, and this study's objective was to investigate the effects of BHA on oxidative stress and apoptosis in addition to delineating its efficacy as a growth-promoting feed additive. 60 weaned male rabbits (V-line) were randomly divided into four equal groups: BHA0.0 (control), BHA50, BHA100, and BHA150, administered basal diets with 0.0, 50, 100, and 150 mg BHA/kg of feed for 60 days. Animals were examined for growth performance, markers of oxidative stress and apoptosis, and meat characteristics. Compared to the control group, rabbits receiving BHA-supplemented diets exhibited increases in BW and average daily gain (P < 0.01), where BHA50 and BHA100 groups showed increased muscle content of methionine aspartic acid, serine, and glutamine (P < 0.05). These two groups also exhibited elevated catalase and superoxide dismutase activities and diminished malondialdehyde levels in the liver. Butylated hydroxyanisole upregulated fatty acid synthase gene (FASN), especially in BHA100 animals. Bcl-2-associated X/B-celllymphoma-2 (Bax/Bcl-2) ratio significantly increased in animals receiving higher doses of BHA, and the weight of the liver significantly increased following BHA treatment. Supplementing growing rabbits with lower doses of dietary BHA may promote growth performance and meat quality via maintaining the redox balance. Hence, the 50-100 mg/kg may be recommended as a safe and still effective feed additive as well as an oxidative stress attenuator.
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Affiliation(s)
- T Imbabi
- Animal Production Department, Faculty of Agriculture, Benha University, Moshtohor 13736, Egypt
| | - A Hassan
- Department of Biotechnology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - O Ahmed-Farid
- Department of Physiology, National Organization for Drug Control and Research, Giza 12553, Egypt
| | - O El-Garhy
- Animal Production Department, Faculty of Agriculture, Benha University, Moshtohor 13736, Egypt
| | - I Sabeq
- Department of Food Hygiene, Faculty of Veterinary Medicine, Benha University, Moshtohor 13736, Egypt
| | - M Moustafa
- Genetics and Genetic Engineering Department, Faculty of Agriculture, Benha University, Moshtohor 13736, Egypt(1)
| | - A Mohammadein
- Department of Biology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - N Hassan
- Department of Biology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - A Osman
- Biochemistry Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt.
| | - M Sitohy
- Biochemistry Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
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16
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Amit M, Takahashi H, Dragomir MP, Anfossi S, Lindemann A, Netto-Glebber F, Tam S, Osman A, Kuntsen E, Pickering CR, Zhao M, Rao X, Wang J, Silverman DA, Caulin C, Zinger A, Tasciotti E, Dougherty P, El-Naggar A, Calin GA, Myers JN. Abstract NG07: Cancer takes a nerve: Loss of p53 drives neuron reprogramming in head and neck cancer. Cancer Res 2021. [DOI: 10.1158/1538-7445.am2021-ng07] [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
The solid tumor microenvironment includes nerve fibers that arise from the peripheral nervous system. Recent work indicates that newly formed adrenergic nerve fibers promote tumor growth, but the origin of these nerves and the mechanism of their inception are unknown. Here, by comparing the transcriptomes of cancer-associated trigeminal sensory neurons with those of endogenous neurons in multiple mouse models of oral cancer, we identified an adrenergic differentiation signature. We show that loss of TP53 leads to adrenergic transdifferentiation of tumor-associated sensory nerves through loss of the microRNA miR-34a. Tumor cells that expressed wild-type p53 protein released vesicles containing microRNAs that were taken up by neighboring neurons. MiR-34a blocks neuronal proliferation, and the neurons were maintained in their current state. By contrast, tumors that had a mutant versions of the gene encoding p53 released vesicles that lacked miR-34a. In this case, neurons increased in number in the vicinity of the tumor, and these cells were reprogrammed as adrenergic neurons that express the molecule noradrenaline. These neurons had more axonal branches than did those near tumors that expressed wild-type p53. Interactions between adrenergic neurons and the tumor aided cancer growth. Tumor growth was inhibited by sensory denervation or pharmacological blockade of adrenergic receptors, but not by chemical sympathectomy of pre-existing adrenergic nerves; and when mice received a transplant of p53-deficient tumor cells, treatment with a drug (carvedilol) that blocks adrenergic signaling pathways slowed tumor growth. A retrospective analysis of tumor samples from patients with oral cancer revealed that p53 status was associated with nerve density, which was in turn associated with poor clinical outcomes. Neural regulation represents an emerging targetable pathway for the treatment of cancer. The peripheral adrenergic nervous system has previously been shown to regulate cancer tumorigenesis. In contrast to previous findings using a prostate cancer mouse model, in our oral cancer mouse model, ablation of the sympathetic nervous system before tumor inoculation neither abrogated the development of adrenergic neo-nerves nor inhibited tumor growth. Our present study reveals that the emergence of adrenergic neonerves in the tumor microenvironment accompanies the initial phase of oral cavity squamous cell carcinoma (OCSCC) development in a transgenic OCSCC mouse models. We have identified crosstalk between the peripheral nervous system and head and neck tumors and described a phenotypic switch, induced by cancer cells, in which sensory nerves differentiate into adrenergic neo-neurons. This crosstalk between cancer cells and neurons represents mechanism by which tumor-associated neurons are reprogrammed towards an adrenergic phenotype that can stimulate tumor progression, and is a potential target for anticancer therapy. Our findings show that in p53-deficient tumors, an miRNA-based mechanism mediates neuronal responses to environmental cues and determines the fate of cancer-associated neurons. We have shown that axonal sprouting and autonomic reprogramming of existing nerves occur as a result of exosomal miRNA shuttling from cancer cells to neurons. These miRNAs orchestrate gene expression via combined dominantly negative (for example, miR-34a) and positive (for example, miR-21 and miR-324) effects, activating transcriptional programs that establish neuronal identity. In our mouse model of OCSCC, surgical ablation of sensory nerves prevented the development of these adrenergic neo-nerves; and as tumors evolve, neo-neural networks develop in and around the tumor stroma, providing signals that coordinate cancer progression. Our results thus show that the peripheral sensory nerves may be reprogrammed during the development of cancer in a manner similar to that of neural progenitors that initiate adrenergic neurogenesis during tumor formation. These results are consistent with recent preclinical data suggesting that sympathetic fibers accumulate in the normal vicinity of solid tumor tissues and infiltrate into the stroma. Furthermore, clinical data show that cancer patients treated with β-blockade have improved survival, supporting the role of adrenergic nerve activity in cancer progression. Although further studies will be required to dissect the molecular events that link tumor-associated neuritogenesis to cancer progression, our data raise the tantalizing possibility that drugs that target both axonal growth and the adrenergic nervous system could be useful for the treatment of cancer. Moreover, our discovery that the absence of functional p53 influences the formation of neighboring neurons might have relevance for interpreting reports showing that fluctuations in the levels of wild-type p53 are observed in nerve regeneration. Thus, these findings might have repercussions that reach beyond the field of cancer research to regenerative medicine.
Citation Format: Moran Amit, Hideaki Takahashi, Mihnea-Paul Dragomir, Simone Anfossi, Antje Lindemann, Frederico Netto-Glebber, Samantha Tam, Abdullah Osman, Erik Kuntsen, Curtis R. Pickering, Mei Zhao, Xiayu Rao, Jing Wang, Deborah A. Silverman, Carlos Caulin, Assaf Zinger, Ennio Tasciotti, Patrick Dougherty, Adel El-Naggar, George A. Calin, Jeffrey N. Myers. Cancer takes a nerve: Loss of p53 drives neuron reprogramming in head and neck cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2021; 2021 Apr 10-15 and May 17-21. Philadelphia (PA): AACR; Cancer Res 2021;81(13_Suppl):Abstract nr NG07.
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Affiliation(s)
- Moran Amit
- 1The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | | | - Simone Anfossi
- 1The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Antje Lindemann
- 1The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - Samantha Tam
- 1The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Abdullah Osman
- 1The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Erik Kuntsen
- 1The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - Mei Zhao
- 1The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Xiayu Rao
- 1The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Jing Wang
- 1The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - Carlos Caulin
- 1The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | | | | | - Adel El-Naggar
- 1The University of Texas MD Anderson Cancer Center, Houston, TX
| | - George A. Calin
- 1The University of Texas MD Anderson Cancer Center, Houston, TX
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17
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Tan LK, Too CL, Nurul-Aain AF, Siti-Aisyah AA, Wahinuddin S, Osman A, Lau IS, Hussein H, Shahril NS, Gun SC, Mageswaren E, Mohamed Said MS, Mohd. Mokhtar A, Azmillah R, Othman M, Alfredsson L, Klareskog L, Shahnaz M, Padyukov L. OP0096 EXPOSURE TO DENGUE INFECTION DO NOT RAISE RISK OF RHEUMATOID ARTHRITIS: FINDINGS FROM THE MALAYSIAN EPIDEMIOLOGICAL INVESTIGATION OF RHEUMATOID ARTHRITIS (MYEIRA) CASE-CONTROL STUDY. Ann Rheum Dis 2021. [DOI: 10.1136/annrheumdis-2021-eular.1684] [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:Dengue infection is associated with joints pain mimicking disease onset symptom of rheumatoid arthritis (RA). However, there is lack of epidemiological studies on exposure to dengue infection and risk of future RA.Objectives:We investigated the relationship between exposure to dengue infection and risk of developing different subsets of RA, defined by the presence of anti-citrullinated peptide antibody (ACPA) in the multi-ethnic Malaysian population.Methods:Serum samples from 1,235 RA cases (i.e. 516 Malay, 254 Chinese, 405 Indians and 60 others/mixed-ethnicity) and 1,624 epidemiological matched population-based controls (i.e. 1,023 Malay, 208 Chinese, 297 Indians and 96 others/mixed-ethnicity) were assayed for presence of dengue IgG antibody using World Health Organization recommended ELISA kits. Positive results of dengue IgG antibodies indicates previous exposure to dengue infection(s). We performed chi-square and Mann-Whitney U analysis to determine the association of ever-exposed dengue infection with ACPA-positive/ACPA-negative RA and to investigate the antibody frequency and levels among the studied populations.Results:We observed high occurrence of dengue IgG antibody in the overall RA cases (79.7%) and matched controls (77.3%), with no significant differences detected between the ACPA subsets of RA. Ethnicity stratification analysis revealed a decrease risk of developing ACPA-positive RA in the Indian patients with positive dengue IgG antibody (OR=0.59, 95% CI=0.37-0.94, p=0.03), and in particular patients with elevated level of dengue IgG antibody (OR=0.44, 95% CI=0.25-0.78, p<0.05). On the other hand, the significant decrease mean levels of dengue IgG antibody were observed in the ACPA-positive RA subset for all three major ethnic groups (i.e. Malay, p<0.0001, Chinese, p<0.01 and Indian<0.05) (Figure 1). No association was observed between presence of dengue IgG antibody and ACPA-negative RA subset.Figure 1.Comparison of mean dengue IgG antibody level between ever-exposed dengue infection RA cases, stratified by ACPA status. Comparison of median dengue IgG antibody level between the ever-exposed dengue infection ACPA-positive RA and normal controls in the four ethnic groups. The red line indicates the mean level of dengue IgG antibody levelConclusion:Our findings demonstrated that exposure to dengue infection do not increase the risk of developing future RA in the multi-ethnic Malaysian population. The inverse associations observed in the Indian ethnic group are in line with the other studies investigating exposure to viral infection and risk of RA.References:[1]Sherina et al (2017) Low levels of antibodies against common viruses associate with anti-citrullinated protein antibody-positive rheumatoid arthritis; implications for disease aetiology. Arthritis Research & Therapy 2017, 19:2169[2]Gissel García et. al. (2011) Long-term persistence of clinical symptoms in dengue-infected persons and its association with immunological disorders. International Journal of Infectious Diseases 15 (2011) e38–e43Acknowledgements:The authors would like to thank the Director General of Health, Ministry of Health Malaysia for supporting this study. The authors are also indebted to participants for their kind participation. This study was financially supported by the Ministry of Health, Malaysia (JPP-IMR 17-025) and the short-term research grant by UniKL RCMP (str16037).Disclosure of Interests:None declared
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19
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Mahran SA, Mohamed AAA, Nigm DA, Rahma MZAA, Abd-Elsalam S, Hamoud H, Hamdy M, Risha MI, Hamdy A, Abdelkareem MM, Ghanem S, Hanafy M, Moshrif A, Fehr A, ElNouby FH, Osman A, Hassanien MM. Subclinical hepatitis C virus infection in Egyptian patients with rheumatic diseases: a multi-center study. Egypt Rheumatol Rehabil 2020. [DOI: 10.1186/s43166-020-00014-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Abstract
Background
Hepatitis C virus (HCV) infection is highly prevalent in Egypt. It was found to be 7.0% in a study done in 2015. There are some studies on the prevalence of HCV in rheumatoid arthritis, but to our knowledge, no previous study was done to detect it in other rheumatologic diseases. This study aims at detecting the prevalence of subclinical HCV infection in Egyptian patients with different rheumatic diseases. In the current study, eight hundred and three patients with different rheumatic diseases collected from five—geographically different—Egyptian rheumatology departments were studied. Patients with known current or previous HCV infection were excluded from the study. Screening for the positive anti-HCV antibodies was done for all patients. Screening for the presence of HCV ribonucleic acid (RNA) was done in patients with positive serology by reverse transcriptase-polymerase chain reaction.
Results
In the studied population, 675 (84.1%) patients were women. The mean age [± SD] was 44.2 [± 12.9] years. Hepatitis C antibody positivity was found in 73 (9.1%) of the patients, while 67 (8.3%) were having positive HCV-RNA quantitative PCR tests. The highest prevalence of seropositive HCV was found in drug-induced vasculitis (DIV) and cryo-vasculitis (100%), while in RA, HCV antibodies and PCR were found to be positive in 9.1% and 8.3% of patients, respectively.
Conclusions
Detection of the presence of HCV infection in 9.1 % of the studied middle-aged Egyptian patients with rheumatologic conditions points to the importance of screening for HCV in such population for early detection and intervention especially for those patients that are planned to start biologic therapy.
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20
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Mohamed S, Osman A, Patel A, Mazhar K, Srinivasan L, Balacumaraswami L. Delayed cardiac tamponade following blunt chest trauma due to disruption of fourth costal cartilage with posterior dislocation. Trauma Case Rep 2020; 29:100340. [PMID: 32793793 PMCID: PMC7415922 DOI: 10.1016/j.tcr.2020.100340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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] [Accepted: 07/27/2020] [Indexed: 11/20/2022] Open
Abstract
Cardiac tamponade is a recognised sequelae of non-penetrating and penetrating chest trauma. Delayed cardiac tamponade has been described following blunt chest trauma. We present a 29 year-old gentleman who had initially presented to peripheral district general hospital following direct blunt chest wall trauma. His initial trauma CT demonstrated a small mediastinal haematoma and large left haemopneumothorax and disruption/dislocation of the costal cartilage. He initially underwent a thoracoscopic procedure uneventfully. He then had worsening chest radiograph appearances with enlarging cardiac contours. Transthoracic echocardiography confirmed cardiac tamponade. He underwent creation of a pericardial window and excision of the protruding fourth costal cartilage.
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Affiliation(s)
- S Mohamed
- Department of Cardiothoracic Surgery, Royal Stoke University Hospital, Stoke On Trent, United Kingdom
| | - A Osman
- Department of Cardiothoracic Surgery, Royal Stoke University Hospital, Stoke On Trent, United Kingdom
| | - A Patel
- Department of Cardiothoracic Surgery, Royal Stoke University Hospital, Stoke On Trent, United Kingdom.,Institute of Immunology and Immunotherapy, University of Birmingham, Vincent Drive, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - K Mazhar
- Department of Cardiothoracic Surgery, Royal Stoke University Hospital, Stoke On Trent, United Kingdom
| | - L Srinivasan
- Department of Cardiothoracic Surgery, Royal Stoke University Hospital, Stoke On Trent, United Kingdom
| | - L Balacumaraswami
- Department of Cardiothoracic Surgery, Royal Stoke University Hospital, Stoke On Trent, United Kingdom
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21
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Grande J, Osman M, De Lorenzo S, Vrieze A, Osman A, Johnson R, Lien K. SAT-177 KLF11 DEFICIENCY EXACERBATES RENAL INJURY IN EXPERIMENTAL UNILATERAL URETERIC OBSTRUCTION. Kidney Int Rep 2020. [DOI: 10.1016/j.ekir.2020.02.189] [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: 10/24/2022] Open
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22
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Sobeih MM, El-Shahat MF, Osman A, Zaid MA, Nassar MY. Glauconite clay-functionalized chitosan nanocomposites for efficient adsorptive removal of fluoride ions from polluted aqueous solutions. RSC Adv 2020; 10:25567-25585. [PMID: 35518600 PMCID: PMC9055320 DOI: 10.1039/d0ra02340j] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 06/25/2020] [Indexed: 11/21/2022] Open
Abstract
We herein have developed a mild approach for the fabrication of glauconite clay (G)-modified chitosan (CS) nanocomposites by the combination of a simple blending and crosslinking method. The chitosan was modified with ethylenediaminetetraacetic acid (EDTA), glutaraldehyde (GL), sodium dodecyl sulfate (SDS), and cetyltrimethyl ammonium bromide (CTAB). The as-prepared composites were identified using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), nitrogen physical adsorption (BET), atomic absorption spectrophotometry (AA), and thermal gravimetric analysis (TGA). The adsorption activities of the as-prepared materials were assessed for the removal of fluoride ions from aqueous media using a batch technique. Raw glauconite (G), GL-CS/G, SDS-CS/G, EDTA-GL-CS/G, and CTAB-CS/G adsorbents displayed maximum adsorption capacity values of 1.15, 4.31, 4.55, 6.90, and 9.03 mg g−1, respectively. The adsorption results were well described by employing the pseudo-second-order kinetic and Langmuir isotherm models. The estimated thermodynamic constants indicated that the F− ion adsorption was a spontaneous, physisorption process. Furthermore, the modified chitosan adsorbents are good candidates for the adsorptive elimination of F− ions from aqueous solutions, according to their reusability, high stability, good adsorption capacity, and applicability for actual field water samples. We herein have developed a mild approach for the fabrication of glauconite clay (G)-modified chitosan (CS) nanocomposites by the combination of a simple blending and crosslinking method.![]()
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Affiliation(s)
- Marwa M. Sobeih
- Chemistry Department
- Faculty of Science
- Ain Shams University
- Cairo
- Egypt
| | - M. F. El-Shahat
- Chemistry Department
- Faculty of Science
- Ain Shams University
- Cairo
- Egypt
| | - A. Osman
- Geology Department
- Faculty of Science
- Ain Shams University
- Cairo
- Egypt
| | - M. A. Zaid
- Abu-Zaabal Company for Fertilizer and Chemical Company (AZFC)
- EL-Qalyubia
- Egypt
| | - Mostafa Y. Nassar
- Chemistry Department
- Faculty of Science
- Benha University
- Benha 13815
- Egypt
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23
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Abdel-Hamid M, Osman A, El-Hadary A, Romeih E, Sitohy M, Li L. Hepatoprotective action of papain-hydrolyzed buffalo milk protein on carbon tetrachloride oxidative stressed albino rats. J Dairy Sci 2019; 103:1884-1893. [PMID: 31837790 DOI: 10.3168/jds.2019-17355] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [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: 07/30/2019] [Accepted: 10/11/2019] [Indexed: 01/10/2023]
Abstract
Buffalo skim milk retentate was hydrolyzed with papain for 4 h (enzyme:substrate, 1:200), resulting in a retentate hydrolysate (RH) with a degree of hydrolysis of 23%. We then investigated the potential hepatoprotective activity of RH at 250 and 500 mg/kg of body weight per day on carbon tetrachloride (CCl4)-induced oxidative stress in albino rats. Liver biomarkers (alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase, and lactate dehydrogenase), kidney biomarkers (urea, creatinine), and serum lipid profile (total lipids and triglycerides) were measured, in addition to histopathological status. Injection of CCl4 significantly increased all liver and kidney biomarkers compared with the negative control. In contrast, CCl4 injection significantly reduced hepatic antioxidant enzyme activities; that is, glutathione peroxidase and superoxide dismutase. Oral administration of RH for 28 d effectively maintained a physiologically normal range of liver and kidney biomarkers compared with the positive control. Furthermore, RH administration significantly increased activities of glutathione peroxidase and superoxide dismutase. Histopathological sections of CCl4-stressed rats treated with RH were different from that of the positive control and were similar to those of the negative control, in a concentration-dependent manner. Our results demonstrated the antihepatotoxic activities of buffalo milk RH and demonstrated that the higher RH concentration (500 mg/kg of body weight per day) could maintain the healthy biological status of the CCl4-injected rats.
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Affiliation(s)
- M Abdel-Hamid
- Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning 530001, China; Dairy Science Department, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
| | - A Osman
- Biochemistry Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
| | - A El-Hadary
- Biochemistry Department, Faculty of Agriculture, Banha University, Banha 13736, Egypt
| | - E Romeih
- Dairy Science Department, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
| | - M Sitohy
- Biochemistry Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
| | - L Li
- Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning 530001, China.
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24
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Tong B, Rollo C, Carter S, Carberry J, Martins R, Osman A, Eckert D. An investigation into the differences in the phenotypic causes of obstructive sleep apnoea in obese versus non-obese people. Sleep Med 2019. [DOI: 10.1016/j.sleep.2019.11.1084] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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25
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Al Faqeeh F, Khalid K, Osman A. Integrating Safety Attitudes and Safety Stressors into Safety Climate and Safety Behavior Relations: The Case of Healthcare Professionals in Abu Dhabi. Oman Med J 2019; 34:504-513. [PMID: 31745414 PMCID: PMC6851062 DOI: 10.5001/omj.2019.93] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Objectives How safety climates, safety attitudes, and safety behaviors are related remains unexplored in the literature, with no study so far investigating the moderating path of safety stressors between these variables. We sought to understand the path through which safety climates may affect safety-behavior-related outcomes, such as safety compliance and participation, through the integration of safety attitudes. Since this study is related to the safety-related perception-intention-behavior relationship, safety stressors are proposed as a moderator of this relationship. Methods A total of 770 healthcare professionals working in public hospitals across Abu Dhabi were randomly selected for this study. We used questionnaires covering demographic details, safety behaviors, safety climates, safety attitudes, and safety stressors to obtain the data. Results The results revealed the partial mediating role of safety attitudes in the relationship between safety climate and safety behavior. Additionally, safety stressors did not moderate the relationship between safety climates, safety attitudes, and safety behaviors, which has some interesting implications for healthcare professionals. Conclusions The study suggests that safety attitudes may also regulate the impact of perceptions of management values regarding safety, policies, and procedures. It is highly likely that healthcare professionals who experience a positive workplace safety climate will form positive safety attitudes that encourage safety behavior. In addition, the homogeneous characteristics of healthcare professionals' in the UAE may also offer the positive coping strategy that caused the insignificant moderating effect of safety stressors on the relationship between safety climates, safety attitudes, and safety behaviors.
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26
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Viljoen CA, Sliwa K, Azibani F, Johnson MR, Baard J, Osman A, Briton O, Ntsekhe M, Anthony J, Chin A. P2533Prospective randomized study on implanted cardiac rhythm recorders in pregnant women with symptomatic arrhythmia and/or structural heart disease. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0862] [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: 11/12/2022] Open
Abstract
Abstract
Background
Cardiac arrhythmia is an important cause of maternal morbidity and mortality in pregnancy, but is difficult to diagnose.
Purpose
The aim of this single-centre, prospective, randomized pilot study was to compare the implantable loop recorder (ILR) with standard assessment of arrhythmia (12-lead ECG; 24-hour Holter ECG) in terms of acceptability, detection of arrhythmias and impact on outcome in pregnant women with symptomatic arrhythmias and/or structural heart disease (SHD).
Methods
The study recruited 40 consecutive patients from a weekly, dedicated cardiac obstetric clinic. Inclusion criteria: symptoms of arrhythmia and/or having SHD at risk of arrhythmia. Patients were randomized to either standard care (SC) or standard care plus ILR (SC-ILR). ILR recordings were read at the monthly visits and/or when presenting with symptoms.
Results
There were no demographic differences between the study groups. Seventeen patients consented to ILR insertion, all of whom found the procedure acceptable. No arrhythmias were recorded by the 12-lead ECGs. Holter monitoring detected arrhythmias in 10 of 23 patients (43%) from the SC group. In the SC-ILR group, 8 of 17 patients (47%) had arrhythmias detected by Holter, whereas 13 of 17 patients (76%) patients had arrhythmias detected by ILR (p=0.157). One of 4 patients with supraventricular tachycardia, 2 of 3 patients with premature ventricular complexes and 2 patients with paroxysmal atrial fibrillation (AF) recorded by ILR did not have the arrhythmias detected by Holter monitoring (Figure 1A shows a scatter plot of the variable R-R intervals seen in AF and 1B a rhythm strip of AF with irregular RR intervals and the absence of P waves, both downloaded from the ILR). Four of these 5 patients (80%) had a change in management as a direct result of their ILR recordings. There were no maternal deaths up to 42 days postpartum in either of the study groups. Nine babies were born with a low birthweight (<2500g), 5 stillbirth/neonatal deaths and 1 pregnancy termination occurred (5 in the Holter group and 1 in ILR group, p=0.37).
Figure 1
Conclusion(s)
This study suggests that an ILR is an acceptable diagnostic modality in pregnant women with a suspected or at risk of arrhythmia. The ILR increased the diagnostic yield to detect arrhythmias that were not detected by routine ECG and Holter monitoring which led to a change in management in the SC-ILR group and was associated with better maternal and neonatal outcomes. The impact of ILR monitoring should be further assessed in larger studies with longer follow up.
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Affiliation(s)
- C A Viljoen
- University of Cape Town, Division of Cardiology, Cape Town, South Africa
| | - K Sliwa
- University of Cape Town, Hatter Institute for Cardiovascular Research in Africa, Cape Town, South Africa
| | - F Azibani
- University of Cape Town, Hatter Institute for Cardiovascular Research in Africa, Cape Town, South Africa
| | - M R Johnson
- Imperial College London, London, United Kingdom
| | - J Baard
- University of Cape Town, Hatter Institute for Cardiovascular Research in Africa, Cape Town, South Africa
| | - A Osman
- University of Cape Town, Division of Obstetrics and Gynaecology, Cape Town, South Africa
| | - O Briton
- University of Cape Town, Hatter Institute for Cardiovascular Research in Africa, Cape Town, South Africa
| | - M Ntsekhe
- University of Cape Town, Division of Cardiology, Cape Town, South Africa
| | - J Anthony
- University of Cape Town, Division of Obstetrics and Gynaecology, Cape Town, South Africa
| | - A Chin
- University of Cape Town, Division of Cardiology, Cape Town, South Africa
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Badawy AA, Othman G, Elabbasy LM, Abd Elsalam M, Shrief R, Fahmy EM, Kamel NM, Osman A, Zaki ME. IL-6 -572G/C and -174G/C polymorphisms association with hepatitis C virus-induced hepatocellular carcinoma. Br J Biomed Sci 2019; 76:201-204. [PMID: 31314698 DOI: 10.1080/09674845.2019.1642562] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- A A Badawy
- Medical Biochemistry Department, Mansoura University, Mansoura, Egypt
| | - G Othman
- Medical Biochemistry Department, Mansoura University, Mansoura, Egypt
| | - L M Elabbasy
- Medical Biochemistry Department, Mansoura University, Mansoura, Egypt
| | - M Abd Elsalam
- Internal Medicine Department, Nephrology and Dialysis Unit, Mansoura University, Mansoura, Egypt
| | - R Shrief
- Medical Microbiology and Immunology Department, Mansoura University, Mansoura, Egypt
| | - E M Fahmy
- Medical Microbiology and Immunology Department, Aswan University, Aswan, Egypt
| | - N M Kamel
- Clinical Pathology Department, Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt
| | - A Osman
- Clinical Pathology Department, Faculty of Medicine, Aswan University, Aswan, Egypt
| | - M E Zaki
- Clinical Pathology Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
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Grande J, Osman M, Osman A, Taha H. SAT-185 FEATURES OF ATHEROSCLEROTIC RENAL ARTERY STENOSIS: AN AUTOPSY BASED STUDY. Kidney Int Rep 2019. [DOI: 10.1016/j.ekir.2019.05.219] [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: 11/16/2022] Open
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Romieh S, Gipril M, Osman A, Elmozy W, Abdul Aziz A, Ramdan F, Nabil SH, Amin A. P89Cyanotic adult with atrial septal defect (ASD) is not an equivalent to an Eisenmenger syndrome. Eur Heart J Cardiovasc Imaging 2019. [DOI: 10.1093/ehjci/jez110.033] [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: 11/12/2022] Open
Affiliation(s)
- S Romieh
- Aswan Heart Centre, Aswan, Egypt
| | - M Gipril
- Aswan Heart Centre, Aswan, Egypt
| | - A Osman
- Aswan Heart Centre, Aswan, Egypt
| | - W Elmozy
- Aswan Heart Centre, Aswan, Egypt
| | | | - F Ramdan
- Aswan Heart Centre, Aswan, Egypt
| | | | - A Amin
- Aswan Heart Centre, Aswan, Egypt
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Alhasan KA, Alherbish A, Osman A, Kari JA, Almojalli H. Successful Treatment of Recurrent Focal Segmental Glomerulosclerosis After Transplantation in Children: A Single-Center Experience. Transplant Proc 2019; 51:517-521. [PMID: 30879580 DOI: 10.1016/j.transproceed.2019.01.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE We aim to report our experience managing cases of recurrent focal segmental glomerulosclerosis (FSGS) in a group of pediatric renal transplant recipients. METHODS This study was a retrospective chart review of pediatric patients who had their first kidney transplant at King Faisal Specialist Hospital & Research Center between 2014 and 2016. RESULTS We reviewed the files of 6 patients, 3 of whom were male. The median age of the children was 2.75 years (range, 2-4 years) at disease onset, with an average time of progression to end-stage renal disease of 19 months (range, 8-30 months). Five of the patients received a living related donor transplant, and 1 received a living nonrelated donor transplant. Patients had FSGS recurrence at varying intervals (1 to 3 days) post transplant. All cases had plasmapheresis prior to receiving abatacept or rituximab. The therapeutic strategy in 4 patients involved switching tacrolimus to cyclosporine. A complete response was observed in 5 of the 6 patients (83.3%), and treatment was well tolerated in 5 patients. Patient 1 had severe oliguria and required intermittent hemodialysis during the first 3 weeks post transplant. He showed minimal response to the therapeutic plasma exchange and rituximab and was subsequently treated with abatacept. However, he died 8 months post transplant of pneumonia and sepsis. CONCLUSION Rituximab and switching tacrolimus to cyclosporine, in conjunction with plasmapheresis, appeared to be effective and safe in children with recurrent FSGS. Conversely, abatacept did not appear to provide clinical benefit.
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Affiliation(s)
- K A Alhasan
- Department of Pediatrics, College of Medicine, King Saud University, King Khalid University Hospital, Riyadh, Saudi Arabia; Organ Transplant Center, King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia.
| | - A Alherbish
- Department of Pediatrics, College of Medicine, King Saud University, King Khalid University Hospital, Riyadh, Saudi Arabia; Organ Transplant Center, King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia
| | - A Osman
- Department of Pediatrics, College of Medicine, King Saud University, King Khalid University Hospital, Riyadh, Saudi Arabia
| | - J A Kari
- Pediatric Nephrology Center of Excellence and Department of Pediatrics, King Abdulaziz University, Jeddah, Saudi Arabia
| | - H Almojalli
- Organ Transplant Center, King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia
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Osman A, Nedeljkovic M, Soler Penades J, Wu Y, Qu Z, Khokhar AZ, Debnath K, Mashanovich GZ. Suspended low-loss germanium waveguides for the longwave infrared. Opt Lett 2018; 43:5997-6000. [PMID: 30547989 DOI: 10.1364/ol.43.005997] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 10/30/2018] [Indexed: 06/09/2023]
Abstract
Germanium is a material of high interest for mid-infrared (MIR) integrated photonics due to its complementary metal-oxide-semiconductor (CMOS) compatibility and its wide transparency window covering the 2-15 μm spectral region exceeding the 4 and 8 μm limit of the silicon-on-insulator platform and Si material, respectively. In this Letter, we report suspended germanium waveguides operating at a wavelength of 7.67 μm with a propagation loss of 2.6±0.3 dB/cm. To the best of our knowledge, this is the first demonstration of low-loss suspended germanium waveguides at such a long wavelength. Suspension of the waveguide is achieved by defining holes alongside the core providing access to the buried oxide layer and the underlying Si layer so that they can be wet etched using hydrofluoric acid and tetramethylammonium hydroxide, respectively. Our MIR waveguides create a new path toward long wavelength sensing in the fingerprint region.
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Heenkenda M, Łysiak M, Åkesson L, Milos P, Mudaisi M, Bratthäll C, Strandeus M, Söderkvist P, Uppugunduri S, Osman A, Malmström A. P01.152 Evaluation of Factor V Leiden variant as risk a factor for venous thromboembolism in glioblastoma patients. Neuro Oncol 2018. [DOI: 10.1093/neuonc/noy139.194] [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: 11/13/2022] Open
Affiliation(s)
- M Heenkenda
- Department of Clinical Chemistry and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - M Łysiak
- Department of Clinical and Experimental Medicine/ Division of Cell Biology, Linköping University, Linköping, Sweden
| | - L Åkesson
- Regional Cancer Center South East Sweden and Dept of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - P Milos
- Department of Neurosurgery, Linköping University, Linköping, Sweden
| | - M Mudaisi
- Department of Oncology, Linköping University, Linköping, Sweden
| | - C Bratthäll
- Dept of Oncology, District Hospital, Kalmar, Sweden
| | - M Strandeus
- Dept of Oncology, Ryhov Hospital, Jönköping, Sweden
| | - P Söderkvist
- Department of Clinical and Experimental Medicine/ Division of Cell Biology, Linköping University, Linköping, Sweden
| | - S Uppugunduri
- Regional Cancer Center South East Sweden, Linköping, Sweden
| | - A Osman
- Department of Clinical Chemistry and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - A Malmström
- Department of Clinical and Experimental Medicine/ Division of Cell Biology and Department of Advanced Home Care, Linköping University, Linköping, Sweden
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34
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Azibani F, Libhaber E, Baard J, Osman A, Zuhlke L, Lachmann A, Chin A, Ntsekhe M, Soma-Pillay P, Johnson MR, Roos-Hesselink J, Anthony J, Sliwa K. P1563Reducing late maternal death due to cardiovascular disease by targeted interventions. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1563] [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)
- F Azibani
- University of Cape Town, Medicine, Cape Town, South Africa
| | - E Libhaber
- University of the Witwatersrand, Soweto Cardiovascular Research Unit, Johannesburg, South Africa
| | - J Baard
- University of Cape Town, Medicine, Cape Town, South Africa
| | - A Osman
- University of Cape Town, Obstetrics & Gynaecology, Cape Town, South Africa
| | - L Zuhlke
- University of Cape Town, Department of Paediatrics, Cape Town, South Africa
| | - A Lachmann
- University of Cape Town, Obstetrics & Gynaecology, Cape Town, South Africa
| | - A Chin
- University of Cape Town, Cardiology, Cape Town, South Africa
| | - M Ntsekhe
- University of Cape Town, Cardiology, Cape Town, South Africa
| | - P Soma-Pillay
- University of Pretoria, 6 Department of Obstetrics and Gynecology, Maternal and Foetal Medicine, Pretoria, South Africa
| | - M R Johnson
- Imperial College London, London, United Kingdom
| | - J Roos-Hesselink
- Erasmus Medical Center, Department of Cardiology, Rotterdam, Netherlands
| | - J Anthony
- University of Cape Town, Obstetrics & Gynaecology, Cape Town, South Africa
| | - K Sliwa
- University of Cape Town, Medicine, Cape Town, South Africa
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35
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Kariv S, Azibani F, Baard J, Osman A, Soma-Pillay P, Anthony J, Sliwa K. Haemorrhage and other complications in pregnant women on anticoagulation for mechanical heart valves: a prospective observational cohort study. Cardiovasc J Afr 2018; 29:289-295. [PMID: 30059130 DOI: 10.5830/cvja-2018-029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Accepted: 05/22/2018] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVE To document maternal and foetal morbidity and mortality in anticoagulated, pregnant patients with mechanical heart valves until 42 days postpartum. METHODS In a tertiary single-centre, prospective cohort, 178 consecutive patients at the cardiac-obstetric clinic were screened for warfarin use between 1 July 2010 and 31 December 2015. Of 33 pregnancies identified, 29 were included. Patients received intravenous unfractionated heparin from six to 12 weeks' gestation and peripartum, and warfarin from 12 to 36 weeks. Maternal outcomes including death, major haemorrhage and thrombosis, and foetal outcomes were documented. RESULTS There were two maternal deaths, five returns to theatre post-delivery, eight patients transfused, six major haemorrhages, one case of infective endocarditis and three ischaemic strokes. Ten pregnancies had poor foetal outcomes (six miscarriages, three terminations, one early neonatal death). Twenty patients required more than 30 days' hospitalisation, and 15 required three or more admissions. HIV positivity was associated with surgical delivery (p = 0.0017). CONCLUSION Complication rates were high despite centralised care.
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Affiliation(s)
- S Kariv
- Department of Medicine, Groote Schuur Hospital and University of Cape Town, Cape Town, South Africa.
| | - F Azibani
- The Cardiac Clinic, Department of Medicine, Groote Schuur Hospital and University of Cape Town; Hatter Institute for Cardiovascular Research in Africa, Department of Medicine, Faculty of Health Sciences and IDM, University of Cape Town, Cape Town, South Africa
| | - J Baard
- The Cardiac Clinic, Department of Medicine, Groote Schuur Hospital and University of Cape Town; Hatter Institute for Cardiovascular Research in Africa, Department of Medicine, Faculty of Health Sciences and IDM, University of Cape Town, Cape Town, South Africa
| | - A Osman
- Department of Obstetrics and Gynaecology, Groote Schuur Hospital and University of Cape Town, Cape Town, South Africa
| | - P Soma-Pillay
- Department of Obstetrics and Gynaecology, Steve Biko Academic Hospital and University of Pretoria, Pretoria, South Africa
| | - J Anthony
- Department of Obstetrics and Gynaecology, Groote Schuur Hospital and University of Cape Town, Cape Town, South Africa
| | - K Sliwa
- The Cardiac Clinic, Department of Medicine, Groote Schuur Hospital and University of Cape Town; Hatter Institute for Cardiovascular Research in Africa, Department of Medicine, Faculty of Health Sciences and IDM, University of Cape Town, Cape Town, South Africa
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36
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Daoud N, Gao M, Osman A, Muntaner C. 3.2-O8Discrimination and mental health among Palestinian minority men in Israel. Eur J Public Health 2018. [DOI: 10.1093/eurpub/cky047.092] [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: 11/14/2022] Open
Affiliation(s)
- N Daoud
- Ben-Gurion University of the Negev, Israel
| | - M Gao
- Critical Care Services, Canada
| | - A Osman
- Center for Regulatory Research on Tobacco Communication
- Lineberger Comprehensive Cancer Center University of North Carolina, Chapel Hill, United States
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Ing T, Patel B, Patel J, Patel N, Yu A, Osman A, Zhou F. Effects of a pH 7.4, lactate-based and a pH 7.4, bicarbonate-based peritoneal dialysis solutions on neutrophil superoxide generation. Int J Artif Organs 2018. [DOI: 10.1177/039139889601901204] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Neutrophil superoxide formation was similar when cells were incubated in self-made, non-autoclaved, pH 7.4, lactate-based peritoneal dialysis solutions or in their self-made, non-autoclaved, pH 7.4, bicarbonate-based counterparts. On the other hand, commercially available, autoclaved, pH 7.4, lactate-based peritoneal dialysis solutions resulted in inhibition of superoxide production when compared to their self-made, non-autoclaved, pH 7.4, lactate-based or bicarbonate-based counterparts. The cause for this inhibition of superoxide generation is at present unknown.
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Affiliation(s)
- T.S. Ing
- Departments of Medicine, Loyola University Chicago, Stritch School of Medicine, Maywood
- Veterans Affairs Hospital, Hines, Illinois - USA
| | - B.P. Patel
- Veterans Affairs Hospital, Hines, Illinois - USA
| | - J.A. Patel
- Veterans Affairs Hospital, Hines, Illinois - USA
| | - N.K. Patel
- Veterans Affairs Hospital, Hines, Illinois - USA
| | - A.W. Yu
- Chinese University of Hong Kong, School of Medicine, Hong Kong
| | - A. Osman
- Veterans Affairs Hospital, Hines, Illinois - USA
| | - F.Q. Zhou
- Veterans Affairs Hospital, Hines, Illinois - USA
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38
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Penadés JS, Sánchez-Postigo A, Nedeljkovic M, Ortega-Moñux A, Wangüemert-Pérez JG, Xu Y, Halir R, Qu Z, Khokhar AZ, Osman A, Cao W, Littlejohns CG, Cheben P, Molina-Fernández I, Mashanovich GZ. Suspended silicon waveguides for long-wave infrared wavelengths. Opt Lett 2018; 43:795-798. [PMID: 29443996 DOI: 10.1364/ol.43.000795] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 12/14/2017] [Indexed: 06/08/2023]
Abstract
In this Letter, we report suspended silicon waveguides operating at a wavelength of 7.67 μm with a propagation loss of 3.1±0.3 dB/cm. To our knowledge, this is the first demonstration of low-loss silicon waveguides at such a long wavelength, with loss comparable to other platforms that use more exotic materials. The suspended Si waveguide core is supported by a sub-wavelength grating that provides lateral optical confinement while also allowing access to the buried oxide layer so that it can be wet etched using hydrofluoric acid. We also demonstrate low-loss waveguide bends and s-bends.
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Abou-Zied K, Abd El-All A, Osman A. Response of Sugar Beet Yield and Water Use Efficiency to Deficit Irrigation and Weed Competition under Drip Irrigation System. Journal of Plant Production 2017; 8:1295-1302. [DOI: 10.21608/jpp.2017.41983] [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] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Osman M, Osman A. Effect of the 2008 economic crisis on the cardiovascular mortality of the Irish population: an ecological 12-year study of a heart-broken Celtic Tiger. Ir Med J 2017; 110:597. [PMID: 29341509] [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: 06/07/2023]
Abstract
Ireland has endured a substantial financial crisis in 2008 and we sought to explore the effect of economic recession on Irish cardiovascular mortality. We found an increase by 17.2% in CVA-deaths during the financial crisis years (95% CI 11.1% to 23.6%). In males, we found a notable rise in the annual IHD rate by 7.56% (95% CI 4.73% to 10.46%), in annual MI rate by 2.96% (95% CI 0.16% to 5.84%), and in annual CVA death rate by 20.07% (95% CI 16.13% to 24.14%). In females our findings indicated an increased rate of CVA-related deaths during the economic crisis by 15.54% (95% CI 6.67% to 25.16%). Irish CVA-related deaths increased during the economic crisis for males and females alike. Male IHD-related deaths have also risen indicating a potential differential effect for financial hardships on male gender mortality.
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Affiliation(s)
- M Osman
- Department of Psychiatry, Royal College of Surgeons in Ireland RCSI School of Medicine, Dublin 2, Ireland
| | - A Osman
- King Fahad military medical complex Hospital, Dhahran, Saudi Arabia
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Baard J, Osman A, Dowling W, Azibani F, Anthony J, Sliwa K. P1498The effect of beta-blockers on fetal birth weight in pregnancies complicated with structural heart disease. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1498] [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)
- J. Baard
- Hatter Institute of Cardiovascular Research in Africa, Medicine, Cape Town, South Africa
| | - A. Osman
- University of Cape Town, Department of Obstetrics and Gynaecology, Cape Town, South Africa
| | - W. Dowling
- Hatter Institute of Cardiovascular Research in Africa, Medicine, Cape Town, South Africa
| | - F. Azibani
- Hatter Institute of Cardiovascular Research in Africa, Medicine, Cape Town, South Africa
| | - J. Anthony
- University of Cape Town, Department of Obstetrics and Gynaecology, Cape Town, South Africa
| | - K. Sliwa
- Hatter Institute of Cardiovascular Research in Africa, Medicine, Cape Town, South Africa
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El Sawaf BM, Helmy N, Kamal HA, Osman A, Shehata M. Soil analysis of breeding sites ofPhlebotomus langeroniNitzulescu andPhlebotomus papatasi(Scopoli) in El Agamy, Egypt. ACTA ACUST UNITED AC 2016. [DOI: 10.1051/parasite/1991663134] [Citation(s) in RCA: 2] [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: 11/14/2022]
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Osman A, Pundir J, Elsherbini M, Dave S, El-Toukhy T, Khalaf Y. The effect of intrauterine HCG injection on IVF outcome: a systematic review and meta-analysis. Reprod Biomed Online 2016; 33:350-9. [PMID: 27317131 DOI: 10.1016/j.rbmo.2016.05.010] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Revised: 05/25/2016] [Accepted: 05/26/2016] [Indexed: 12/23/2022]
Abstract
In this systematic review and meta-analysis, the effect of intrauterine HCG infusion before embryo transfer on IVF outcomes (live birth rate, clinical pregnancy rate and spontaneous aboretion rate) was investigated. Searches were conducted on MEDLINE, EMBASE and The Cochrane Library. Randomized studies in women undergoing IVF and intracytoplasmic sperm injection comparing intrauterine HCG administration at embryo transfer compared with no intrauterine HCG were eligible for inclusion. Eight randomized controlled trials were eligible for inclusion in the meta-analysis. A total of 3087 women undergoing IVF and intracytoplasmic sperm injection cycles were enrolled (intrauterine HCG group: n = 1614; control group: n = 1473). No significant difference was found in the live birth rate (RR 1.13; 95% CI 0.84 to 1.53) and spontaneous abortion rate (RR 1.00, 95% CI 0.74 to 1.34) between women who received intrauterine HCG and those who did not receive HCG. Although this review was extensive and included randomized controlled trials, no significant heterogeneity was found, and the overall included numbers are relatively small. In conclusion the current evidence does not support the use of intrauterine HCG administration before embryo transfer. Well-designed multicentre trials are needed to provide robust evidence.
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Affiliation(s)
- A Osman
- Assisted Conception Unit, Guys Hospital, Great Maze Pond SE1 9RT, UK; Faculty of Medicine, Cairo University, Al-Saray Street, El Manial Cairo 11956, Egypt.
| | - J Pundir
- Centre of reproductive medicine, St Bartholomew's Hospital, Bart's Health, London EC1A 7BE, UK
| | - M Elsherbini
- Faculty of Medicine, Cairo University, Al-Saray Street, El Manial Cairo 11956, Egypt
| | - S Dave
- Centre of reproductive medicine, St Bartholomew's Hospital, Bart's Health, London EC1A 7BE, UK
| | - T El-Toukhy
- Assisted Conception Unit, Guys Hospital, Great Maze Pond SE1 9RT, UK
| | - Y Khalaf
- Assisted Conception Unit, Guys Hospital, Great Maze Pond SE1 9RT, UK
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Osman A, Maalej N, Jayesh K, Abdel-Rahman W. SU-F-T-295: MLCs Performance and Patient-Specific IMRT QA Using Log File Analysis. Med Phys 2016. [DOI: 10.1118/1.4956480] [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: 11/07/2022] Open
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Hasbullah NA, Osman A, Abdullah S, Salahuddin SN, Ramlee NF, Soha HM. The Relationship of Attitude, Subjective Norm and Website Usability on Consumer Intention to Purchase Online: An Evidence of Malaysian Youth. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/s2212-5671(16)00061-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [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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Wardle A, Osman A, Falconer L, Howes B. Teaching anaesthetists the skills of communication. Br J Anaesth 2015; 115:321. [DOI: 10.1093/bja/aev242] [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: 11/13/2022] Open
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Costea D, Hills A, Osman A, Thurlow J, Parajuli H, Suleiman S, Johannessen A, Partridge M. 25 Different subsets of carcinoma-associated fibroblasts promote oral carcinoma cell invasion by distinct mechanisms. Oral Oncol 2015. [DOI: 10.1016/j.oraloncology.2015.02.027] [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: 11/17/2022]
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Ginder LM, Porter NA, Subedi N, Singh J, Lalam RK, Tins BJ, Tyrrell PNM, Osman A, Cassar-Pullicino VN. MRI of inflammatory spondyloarthropathy following traumatic cauda equina syndrome. Spinal Cord 2015; 53 Suppl 1:S6-9. [PMID: 25900290 DOI: 10.1038/sc.2014.190] [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: 03/19/2014] [Revised: 08/28/2014] [Accepted: 09/26/2014] [Indexed: 11/09/2022]
Abstract
BACKGROUND CONTEXT Spondyloarthropathy has been described radiographically in patients following paralysis from spinal cord trauma. Onset of these findings after cauda equina syndrome have not been reported previously. Furthermore, the magnetic resonance documentation of its early evolution has not been recorded. PURPOSE We report a case of early-onset spondyloarthropathy shown by magnetic resonance imaging (MRI) in a patient with cauda equina syndrome due to bilateral sacral insufficiency fractures. STUDY DESIGN Unique case study review, one case. METHODS Review of the clinical case notes and imaging including initial and subsequent MR imaging. RESULTS The initial MRI of the lumbosacral spine showed bilateral sacral insufficiency fractures with a kyphotic deformity. The vertebral bodies were normal on the initial computed tomography and MRI studies, which did not reveal pre-existing features of sacroiliitis. The second MRI performed 5 months later clearly showed spondylitis at multiple vertebral levels with partial resolution 18 months post injury. CONCLUSION Spondyloarthropathy in patients with paralysis due to spinal cord injury is well documented in the English language literature, but until now this has not been demonstrated by MRI. It is a rare complication of traumatic cauda equina syndrome that commences soon after the traumatic event and can resolve spontaneously.
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Affiliation(s)
- L M Ginder
- Department of Diagnostic Imaging, The Robert Jones and Agnes Hunt Orthopaedic Hospital NHS Foundation Trust, Oswestry, Shropshire, U K
| | - N A Porter
- Salford Royal NHS foundation trust, Salford Royal NHS Foundation Trust, Stott Lane, Salford, UK
| | - N Subedi
- Department of Diagnostic Imaging, The Robert Jones and Agnes Hunt Orthopaedic Hospital NHS Foundation Trust, Oswestry, Shropshire, U K
| | - J Singh
- Department of Diagnostic Imaging, The Robert Jones and Agnes Hunt Orthopaedic Hospital NHS Foundation Trust, Oswestry, Shropshire, U K
| | - R K Lalam
- Department of Diagnostic Imaging, The Robert Jones and Agnes Hunt Orthopaedic Hospital NHS Foundation Trust, Oswestry, Shropshire, U K
| | - B J Tins
- Department of Diagnostic Imaging, The Robert Jones and Agnes Hunt Orthopaedic Hospital NHS Foundation Trust, Oswestry, Shropshire, U K
| | - P N M Tyrrell
- Department of Diagnostic Imaging, The Robert Jones and Agnes Hunt Orthopaedic Hospital NHS Foundation Trust, Oswestry, Shropshire, U K
| | - A Osman
- Midlands Centre for Spinal Injuries, The Robert Jones and Agnes Hunt Orthopaedic Hospital NHS Foundation Trust, Oswestry, Shropshire, UK
| | - V N Cassar-Pullicino
- Department of Diagnostic Imaging, The Robert Jones and Agnes Hunt Orthopaedic Hospital NHS Foundation Trust, Oswestry, Shropshire, U K
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Yi Jin L, Osman A, Romle AR, Haji-Othman Y. Attitude towards Online Shopping Activities in Malaysia Public University. MJSS 2015. [DOI: 10.5901/mjss.2015.v6n2s1p456] [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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