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Qayed M, Kapoor U, Gillespie S, Westbrook A, Aguayo-Hiraldo P, Ayuk FA, Aziz M, Baez J, Choe H, DeFilipp Z, Etra A, Grupp SA, Hexner E, Holler E, Hogan WJ, Kowalyk S, Merli P, Morales G, Nakamura R, Pulsipher MA, Schechter T, Shah J, Spyrou N, Srinagesh HK, Wölfl M, Yanik G, Young R, Kitko CL, Ferrara JLM, Levine JE. A Validated Risk Stratification That Incorporates MAGIC Biomarkers Predicts Long-Term Outcomes in Pediatric Patients with Acute GVHD. Transplant Cell Ther 2024:S2666-6367(24)00294-X. [PMID: 38548227 DOI: 10.1016/j.jtct.2024.03.022] [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: 01/29/2024] [Revised: 03/11/2024] [Accepted: 03/20/2024] [Indexed: 04/10/2024]
Abstract
Acute graft versus host disease (GVHD) is a common and serious complication of allogeneic hematopoietic cell transplantation (HCT) in children but overall clinical grade at onset only modestly predicts response to treatment and survival outcomes. Two tools to assess risk at initiation of treatment were recently developed. The Minnesota risk system stratifies children for risk of nonrelapse mortality (NRM) according to the pattern of GVHD target organ severity. The Mount Sinai Acute GVHD International Consortium (MAGIC) algorithm of 2 serum biomarkers (ST2 and REG3α) predicts NRM in adult patients but has not been validated in a pediatric population. We aimed to develop and validate a system that stratifies children at the onset of GVHD for risk of 6-month NRM. We determined the MAGIC algorithm probabilities (MAPs) and Minnesota risk for a multicenter cohort of 315 pediatric patients who developed GVHD requiring treatment with systemic corticosteroids. MAPs created 3 risk groups with distinct outcomes at the start of treatment and were more accurate than Minnesota risk stratification for prediction of NRM (area under the receiver operating curve (AUC), .79 versus .62, P = .001). A novel model that combined Minnesota risk and biomarker scores created from a training cohort was more accurate than either biomarkers or clinical systems in a validation cohort (AUC .87) and stratified patients into 2 groups with highly different 6-month NRM (5% versus 38%, P < .001). In summary, we validated the MAP as a prognostic biomarker in pediatric patients with GVHD, and a novel risk stratification that combines Minnesota risk and biomarker risk performed best. Biomarker-based risk stratification can be used in clinical trials to develop more tailored approaches for children who require treatment for GVHD.
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Affiliation(s)
- Muna Qayed
- Emory University School of Medicine, Atlanta, Georgia; Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Atlanta, Georgia.
| | - Urvi Kapoor
- The Tisch Cancer Institute and Division of Hematology/Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Scott Gillespie
- Pediatric Biostatistics Core, Department of Pediatrics, Emory University, Atlanta, Georgia
| | - Adrianna Westbrook
- Pediatric Biostatistics Core, Department of Pediatrics, Emory University, Atlanta, Georgia
| | - Paibel Aguayo-Hiraldo
- Division of Hematology, Oncology, and BMT, Children's Hospital Los Angeles, Los Angeles, California
| | - Francis A Ayuk
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Mina Aziz
- The Tisch Cancer Institute and Division of Hematology/Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Janna Baez
- The Tisch Cancer Institute and Division of Hematology/Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Hannah Choe
- Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Zachariah DeFilipp
- Hematopoietic Cell Transplant and Cellular Therapy Program, Massachusetts General Hospital, Boston, Massachusetts
| | - Aaron Etra
- The Tisch Cancer Institute and Division of Hematology/Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Stephan A Grupp
- Division of Oncology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Elizabeth Hexner
- Blood and Marrow Transplantation Program, Abramson Cancer Center and the Division of Hematology and Oncology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Ernst Holler
- Department of Hematology and Oncology, Internal Medicine III, University of Regensburg, Regensburg, Germany
| | | | - Steven Kowalyk
- The Tisch Cancer Institute and Division of Hematology/Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Pietro Merli
- Ospedale Pediatrico Bambino Gesú, IRCCS, Rome, Italy
| | - George Morales
- The Tisch Cancer Institute and Division of Hematology/Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Ryotaro Nakamura
- Hematology/Hematopoietic Cell Transplant, City of Hope National Medical Center, Duarte, California
| | - Michael A Pulsipher
- Division of Hematology, Oncology, and BMT, Children's Hospital Los Angeles, Los Angeles, California; Division of Hematology and Oncology, Intermountain Primary Children's Hospital, Huntsman Cancer Institute at the Spencer Fox Eccles School of Medicine at the University of Utah, Salt Lake City, Utah
| | - Tal Schechter
- Division of Hematology/Oncology/BMT, The Hospital for Sick Children, Toronto, ON, Canada
| | - Jay Shah
- The Tisch Cancer Institute and Division of Hematology/Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Nikolaos Spyrou
- The Tisch Cancer Institute and Division of Hematology/Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Hrishikesh K Srinagesh
- The Tisch Cancer Institute and Division of Hematology/Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Matthias Wölfl
- Pediatric Blood and Marrow Transplantation Program, Children's Hospital, University of Würzburg, Würzburg, Germany
| | - Gregory Yanik
- Pediatric Blood and Marrow Transplant Program, University of Michigan, Ann Arbor, Michigan
| | - Rachel Young
- The Tisch Cancer Institute and Division of Hematology/Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Carrie L Kitko
- Pediatric Blood and Marrow Transplant Program, Vanderbilt University Medical Center, Nashville, Tennessee
| | - James L M Ferrara
- The Tisch Cancer Institute and Division of Hematology/Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - John E Levine
- The Tisch Cancer Institute and Division of Hematology/Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York
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Pattison LM, Aziz M, Goldfinger M, Amin B, McLellan BN. Ulcerative lymphomatoid papulosis following immune checkpoint inhibition and autologous stem cell transplant in a patient with recurrent Hodgkin lymphoma: a case report. Acta Oncol 2023; 62:1956-1960. [PMID: 37819261 DOI: 10.1080/0284186x.2023.2258448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 09/07/2023] [Indexed: 10/13/2023]
Affiliation(s)
- Lindsay M Pattison
- Department of Medicine, Division of Dermatology, Montefiore Medical Center, Bronx, NY, USA
| | - Mina Aziz
- Department of Medicine, Division of Dermatology, Montefiore Medical Center, Bronx, NY, USA
| | - Mendel Goldfinger
- Department of Oncology and Hematology, Montefiore Medical Center, Bronx, NY, USA
| | - Bijal Amin
- Department of Medicine, Division of Dermatology, Montefiore Medical Center, Bronx, NY, USA
| | - Beth N McLellan
- Department of Medicine, Division of Dermatology, Montefiore Medical Center, Bronx, NY, USA
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Istavara A, Ratiko R, Aziz M, Aisyah A, Nasruddin N. Optimization of heat removal and radiation protection of dry cask storage for MTR spent nuclear fuel. ANN NUCL ENERGY 2023. [DOI: 10.1016/j.anucene.2023.109749] [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: 02/19/2023]
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Arias-Gaguancela O, Herrell E, Aziz M, Chapman KD. Two legume fatty acid amide hydrolase isoforms with distinct preferences for microbial- and plant-derived acylamides. Sci Rep 2023; 13:7486. [PMID: 37161076 PMCID: PMC10169808 DOI: 10.1038/s41598-023-34754-z] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 05/06/2023] [Indexed: 05/11/2023] Open
Abstract
Fatty acid amide hydrolase (FAAH) is a widely conserved amidase in eukaryotes, perhaps best known for inactivating N-acylethanolamine lipid mediators. However, FAAH enzymes hydrolyze a wide range of acylamide substrates. Analysis of FAAHs from multiple angiosperm species revealed two conserved phylogenetic groups that differed in key conserved residues in the substrate binding pocket. While the foundation group of plant FAAHs, designated FAAH1, has been studied at the structural and functional level in Arabidopsis thaliana, nothing is known about FAAH2 members. Here, we combined computational and biochemical approaches to compare the structural and enzymatic properties of two FAAH isoforms in the legume Medicago truncatula designated MtFAAH1 and MtFAAH2a. Differences in structural and physicochemical properties of the substrate binding pockets, predicted from homology modeling, molecular docking, and molecular dynamic simulation experiments, suggested that these two FAAH isoforms would exhibit differences in their amidohydrolase activity profiles. Indeed, kinetic studies of purified, recombinant MtFAAHs indicated a reciprocal preference for acylamide substrates with MtFAAH1 more efficiently utilizing long-chain acylamides, and MtFAAH2a more efficiently hydrolyzing short-chain and aromatic acylamides. This first report of the enzymatic behavior of two phylogenetically distinct plant FAAHs will provide a foundation for further investigations regarding FAAH isoforms in legumes and other plant species.
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Affiliation(s)
- Omar Arias-Gaguancela
- BioDiscovery Institute, Department of Biological Sciences, University of North Texas, Denton, TX, USA
| | - Emily Herrell
- BioDiscovery Institute, Department of Biological Sciences, University of North Texas, Denton, TX, USA
| | - Mina Aziz
- BioDiscovery Institute, Department of Biological Sciences, University of North Texas, Denton, TX, USA
| | - Kent D Chapman
- BioDiscovery Institute, Department of Biological Sciences, University of North Texas, Denton, TX, USA.
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Arias-Gaguancela O, Aziz M, Chapman KD. Fatty acid amide hydrolase and 9-lipoxygenase modulate cotton seedling growth by ethanolamide oxylipin levels. Plant Physiol 2023; 191:1234-1253. [PMID: 36472510 PMCID: PMC9922431 DOI: 10.1093/plphys/kiac556] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
Polyunsaturated N-acylethanolamines (NAEs) can be hydrolyzed by fatty acid amide hydrolase (FAAH) or oxidized by lipoxygenase (LOX). In Arabidopsis (Arabidopsis thaliana), the 9-LOX product of linoleoylethanolamide, namely, 9-hydroxy linoleoylethanolamide (9-NAE-HOD), is reported to negatively regulate seedling development during secondary dormancy. In upland cotton (Gossypium hirsutum L.), six putative FAAH genes (from two diverged groups) and six potential 9-LOX genes are present; however, their involvement in 9-NAE-HOD metabolism and its regulation of seedling development remain unexplored. Here, we report that in cotton plants, two specific FAAH isoforms (GhFAAH Ib and GhFAAH IIb) are needed for hydrolysis of certain endogenous NAEs. Virus-induced gene silencing (VIGS) of either or both FAAHs led to reduced seedling growth and this coincided with reduced amidohydrolase activities and elevated quantities of endogenous 9-NAE-HOD. Transcripts of GhLOX21 were consistently elevated in FAAH-silenced tissues, and co-silencing of GhLOX21 and GhFAAH (Ib and/or IIb) led to reversal of seedling growth to normal levels (comparable with no silencing). This was concomitant with reductions in the levels of 9-NAE-HOD, but not of 13-NAE-HOD. Pharmacological experiments corroborated the genetic and biochemical evidence, demonstrating that direct application of 9-NAE-HOD, but not 13-NAE-HOD or their corresponding free fatty acid oxylipins, inhibited the growth of cotton seedlings. Additionally, VIGS of GhLOX21 in cotton lines overexpressing AtFAAH exhibited enhanced growth and no detectable 9-NAE-HOD. Altogether, we conclude that the growth of cotton seedlings involves fine-tuning of 9-NAE-HOD levels via FAAH-mediated hydrolysis and LOX-mediated production, expanding the mechanistic understanding of plant growth modulation by NAE oxylipins to a perennial crop species.
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Arias‐Gaguancela O, Adhikari B, Aziz M, Chapman KD. Enhanced seedling growth by 3- n-pentadecylphenolethanolamide is mediated by fatty acid amide hydrolases in upland cotton ( Gossypium hirsutum L.). Plant Direct 2022; 6:e421. [PMID: 35844778 PMCID: PMC9277032 DOI: 10.1002/pld3.421] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 06/16/2022] [Accepted: 06/19/2022] [Indexed: 05/25/2023]
Abstract
Fatty acid amide hydrolase (FAAH) is a conserved amidase that is known to modulate the levels of endogenous N-acylethanolamines (NAEs) in both plants and animals. The activity of FAAH is enhanced in vitro by synthetic phenoxyacylethanolamides resulting in greater hydrolysis of NAEs. Previously, 3-n-pentadecylphenolethanolamide (PDP-EA) was shown to exert positive effects on the development of Arabidopsis seedlings by enhancing Arabidopsis FAAH (AtFAAH) activity. However, there is little information regarding FAAH activity and the impact of PDP-EA in the development of seedlings of other plant species. Here, we examined the effects of PDP-EA on growth of upland cotton (Gossypium hirsutum L. cv Coker 312) seedlings including two lines of transgenic seedlings overexpressing AtFAAH. Independent transgenic events showed accelerated true-leaf emergence compared with non-transgenic controls. Exogenous applications of PDP-EA led to increases in overall seedling growth in AtFAAH transgenic lines. These enhanced-growth phenotypes coincided with elevated FAAH activities toward NAEs and NAE oxylipins. Conversely, the endogenous contents of NAEs and NAE-oxylipin species, especially linoleoylethanolamide and 9-hydroxy linoleoylethanolamide, were lower in PDP-EA treated seedlings than in controls. Further, transcripts for endogenous cotton FAAH genes were increased following PDP-EA exposure. Collectively, our data corroborate that the enhancement of FAAH enzyme activity by PDP-EA stimulates NAE-hydrolysis and that this results in enhanced growth in seedlings of a perennial crop species, extending the role of NAE metabolism in seedling development beyond the model annual plant species, Arabidopsis thaliana.
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Affiliation(s)
- Omar Arias‐Gaguancela
- BioDiscovery Institute, Department of Biological SciencesUniversity of North TexasDentonTXUSA
| | | | - Mina Aziz
- BioDiscovery Institute, Department of Biological SciencesUniversity of North TexasDentonTXUSA
| | - Kent D. Chapman
- BioDiscovery Institute, Department of Biological SciencesUniversity of North TexasDentonTXUSA
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Arshad M, Ruby T, Shahzad MI, Alvi Q, Aziz M, Sahar S, Amjad R, Waheed A, Muhammad SG, Shaheen A, Ahmed S. An antimicrobial activity of oil extracted from Saara hardwickii. BRAZ J BIOL 2022; 84:e253508. [PMID: 35195177 DOI: 10.1590/1519-6984.253508] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 10/22/2021] [Indexed: 11/22/2022] Open
Abstract
Present research work represents antiviral and antibacterial value of body fat of Saara hardwickii commonly called as spiny tailed lizard. Oil was extracted from body fats located in the ventral region of this animal using hydrocarbons e.g., n-hexane, methanol, butanol and ethyl acetate as a solvent. The antibacterial activity of lizard oil was tested against standard as well as multi-resistant lines ofEscherichia coli, Styphalococcus aureus, Pseudomonas aeruginosa and Proteus vulgaris alone and with antibiotic ampicillin. For antibacterial potential, Ethyl acetate and Butanol solvent extract showed best zone of inhibition (7mm) with P. aeruginosa and S. aureus respectively. For antiviral potential, Butanol and Methanol extract showed best HA (Hemagglutination) titer of 04 with NDV and IBV viral strain respectively. It is concluded that lizard oil has antimicrobial potential against different pathogens strains (virus, bacteria).
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Affiliation(s)
- M Arshad
- Government College University Fasialabad Sahiwal campus, Sahiwal, Pakistan
| | - T Ruby
- The Islamia University of Bahawalpur, Department of Zoology, Bahawalpur, Pakistan
| | - M I Shahzad
- The Islamia University of Bahawalpur,Department of Biochemistry,Institute of Biochemistry, Biotechnology and Bioinformatics, Bahawalpur, Pakistan
| | - Q Alvi
- Taylor's University, Faculty of Health and Medical Sciences, School of Biosciences, Kualalampur, Selangor, Malaysia
| | - M Aziz
- Bahauddin Zakariya University, Department of Microbiology and Genetics, Multan, Pakistan
| | - S Sahar
- The Islamia University of Bahawalpur, Department of Zoology, Bahawalpur, Pakistan
| | - R Amjad
- The Islamia University of Bahawalpur, Department of Zoology, Bahawalpur, Pakistan
| | - A Waheed
- The Islamia University of Bahawalpur, Department of Zoology, Bahawalpur, Pakistan
| | - S G Muhammad
- The Islamia University of Bahawalpur, Department of Zoology, Bahawalpur, Pakistan
| | - A Shaheen
- The Islamia University of Bahawalpur, Department of Zoology, Bahawalpur, Pakistan
| | - S Ahmed
- Bahauddin Zakariya University, Institute of Pure and Applied Biology, Zoology Division, Multan, Pakistan
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Blankstein AR, Houston BL, Fergusson DA, Houston DS, Rimmer E, Bohm E, Aziz M, Garland A, Doucette S, Balshaw R, Turgeon A, Zarychanski R. Transfusion in orthopaedic surgery : a retrospective multicentre cohort study. Bone Jt Open 2021; 2:850-857. [PMID: 34665003 PMCID: PMC8558454 DOI: 10.1302/2633-1462.210.bjo-2021-0077.r1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Aims Orthopaedic surgeries are complex, frequently performed procedures associated with significant haemorrhage and perioperative blood transfusion. Given refinements in surgical techniques and changes to transfusion practices, we aim to describe contemporary transfusion practices in orthopaedic surgery in order to inform perioperative planning and blood banking requirements. Methods We performed a retrospective cohort study of adult patients who underwent orthopaedic surgery at four Canadian hospitals between 2014 and 2016. We studied all patients admitted to hospital for nonarthroscopic joint surgeries, amputations, and fracture surgeries. For each surgery and surgical subgroup, we characterized the proportion of patients who received red blood cell (RBC) transfusion, the mean/median number of RBC units transfused, and exposure to platelets and plasma. Results Of the 14,584 included patients, the most commonly performed surgeries were knee arthroplasty (24.8%), hip arthroplasty (24.6%), and hip fracture surgery (17.4%). A total of 10.3% of patients received RBC transfusion; the proportion of patients receiving RBC transfusions varied widely based on the surgical subgroup (0.0% to 33.1%). Primary knee arthroplasty and hip arthroplasty, the two most common surgeries, were associated with in-hospital transfusion frequencies of 2.8% and 4.5%, respectively. RBC transfusion occurred in 25.0% of hip fracture surgeries, accounting for the greatest total number of RBC units transfused in our cohort (38.0% of all transfused RBC units). Platelet and plasma transfusions were uncommon. Conclusion Orthopaedic surgeries were associated with variable rates of transfusion. The rate of RBC transfusion is highly dependent on the surgery type. Identifying surgeries with the highest transfusion rates, and further evaluation of factors that contribute to transfusion in identified at-risk populations, can serve to inform perioperative planning and blood bank requirements, and facilitate pre-emptive transfusion mitigation strategies. Cite this article: Bone Jt Open 2021;2(10):850–857.
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Affiliation(s)
- Anna R Blankstein
- Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, Canada
| | - Brett L Houston
- Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, Canada.,Department of Internal Medicine - Hematology/Oncology, University of Manitoba Max Rady College of Medicine, Winnipeg, Canada.,Department of Medical Oncology and Hematology, CancerCare Manitoba, Winnipeg, Canada
| | - Dean A Fergusson
- Clinical Epidemiology, Ottawa Hospital Research Institute, Ottawa, Canada.,Department of Medicine, University of Ottawa, Ottawa, Canada
| | - Donald S Houston
- Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, Canada.,Department of Internal Medicine - Hematology/Oncology, University of Manitoba Max Rady College of Medicine, Winnipeg, Canada.,Department of Medical Oncology and Hematology, CancerCare Manitoba, Winnipeg, Canada
| | - Emily Rimmer
- Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, Canada.,Department of Internal Medicine - Hematology/Oncology, University of Manitoba Max Rady College of Medicine, Winnipeg, Canada.,Department of Medical Oncology and Hematology, CancerCare Manitoba, Winnipeg, Canada
| | - Eric Bohm
- Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, Canada.,Department of Orthopedic Surgery, University of Manitoba, Winnipeg, Canada
| | - Mina Aziz
- Department of Orthopedic Surgery, University of Manitoba, Winnipeg, Canada
| | - Allan Garland
- Department of Internal Medicine - Critical Care, University of Manitoba Max Rady College of Medicine, Winnipeg, Canada.,Department of Community Health Sciences, University of Manitoba, Winnipeg, Canada
| | - Steve Doucette
- Research Methods Unit, Nova Scotia Health Authority, Halifax, Canada
| | - Robert Balshaw
- Department of Community Health Sciences, University of Manitoba, Winnipeg, Canada
| | - Alexis Turgeon
- Department of Anesthesiology and Critical Care, Universite Laval Faculte de medecine, Quebec, Canada.,CHU de Québec - Université Laval Research Center, Population Health and Optimal Health Practices Research Unit (Trauma-Emergency-Critical Care Medicine), Université Laval, Quebec, Canada
| | - Ryan Zarychanski
- Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, Canada.,Department of Medical Oncology and Hematology, CancerCare Manitoba, Winnipeg, Canada.,Department of Community Health Sciences, University of Manitoba, Winnipeg, Canada.,Internal Medicine - Hematology/Oncology and Critical Care, University of Manitoba Max Rady College of Medicine, Winnipeg, Canada
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Shakir K, Aziz M, Benyamin K. Foam Separation; Part I / Schaumtrennung; Teil I. TENSIDE SURFACT DET 2021. [DOI: 10.1515/tsd-1990-270522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Power JD, Glennie A, Rogers S, Aziz M, Singh S, Dandurand C, Tauh S, Richard-Denis A, Morris S, Richard-Denis A, Lim V, Mputu PM, Soroceanu A, Sadiq I, Daly C, Dandurand C, Larouche J, Correale M, Sharma A, Charest-Morin R, Lee J, Ajoku U, Moskven E, Asif H, Al-attar ENM, Mishreky A, Rocos B, Rocos B, Rocos B, Srivastava SK, Patgaonkar P, Cummins D, Bednar D, Chan V, Bowker R, Evaniew N, Hathi K, Hall H, Ludwig T, Ludwig T, Truong VT, Passalent L, Wang S, Shaikh N, Pelletier-Roy R, Shen J, Wang Z, Singh S, Machida M, Machida M, Fernandes R, Fernandes R, Marathe N, Kerr J, Magnan MC, Visva S, Jarvis J, Jarvis J, Jentzsch T, Cherry A, Cherry A, Cherry A, Dandurand C, Rampersaud R, Sundararajan K, Levasseur A, Fernandes R, Fernandes R, Fullerton K, Malone H, Daly C, Peloza J, Peloza J, Walden K, Elsemin O, MacLean MA, Rose J, Oppermann M, Ferguson D, Hindi M, Dermott JA, DeVries Z, Lebel D, Ayling O, Singh V, Craig M, Lasswell T, Perruccio AV, Canizares M, McIntosh G, Rampersaud YR, Urquhart J, Koto P, Rasoulinejad P, Sequeira K, Miller T, Watson J, Rosedale R, Gurr K, Siddiqi F, Bailey C, Manson N, Bigney E, Vandewint A, Richardson E, El-Mughayyar D, McPhee R, Abraham E, Weber M, McIntosh G, Kelly A, Santaguida C, Ouellet J, Reindl R, Jarzem P, Lasry O, Dea N, Fisher C, Street J, Boyd M, Charest-Morin R, Rhines L, Boriani S, Charest-Morin R, Gokaslan Z, Gasbarrini A, Saghal A, Laufer II, Lazary A, Bettegowda C, Kawahara N, Clarke M, Rampersaud YR, Reynolds J, Disch A, Chou D, Shin JH, Wei F, Hornicek FJ, Barzilai O, Fisher C, Dea N, Nickel D, Thorpe L, Brown J, Weiler R, Linassi G, Fourney D, Dionne A, Bégin J, Mac-Thiong JM, Yung A, George S, Prevost V, Bauman A, Kozlowski P, Samadi F, Fournier C, Parker L, Dong K, Streijger F, Moore GW, Laule C, Kwon B, Gravel LF, Dionne A, Bourassa-Moreau E, Maurais G, Khoueir P, Mac-Thiong JM, Richard-Denis A, Dionne A, Bourassa-Moreau É, Bégin J, Mac-Thiong JM, Beausejour M, Richard-Denis A, Begin J, Dionne A, Mac-Thiong JM, Scheer J, Protopsaltis T, Gupta M, Passias P, Gum J, Smith J, Bess S, Lafage V, Ames C, Klineberg E, Frederick A, Nicholls F, Lewkonia P, Thomas K, Jacobs B, Swamy G, Miller N, Tanguay R, Soroceanu A, Nevin J, Bourassa-Moreau E, Dvorak M, Fisher C, Paquette S, Kwon B, Dea N, Ailon T, Charest-Morin R, Street J, Hindi M, Kwon B, Dvorak M, Ailon T, Paquette S, Fisher C, Charest-Morin R, Dea N, Street J, Finkelstein J, Bowes J, Ford M, Yee A, Soever L, Rachevitz M, Bigness A, Robertson S, Wilson R, Wong W, Nugent J, Frantzeskos S, Duffy M, Rampersaud R, Marathe N, Agarwal R, Bailey CS, Paquet J, Dea N, Goytan M, McIntosh G, Street J, Fisher C, Jacobs B, Johnson M, Paquet J, Hall H, Bailey C, Christie S, Nataraj A, Manson N, Phan P, Rampersaud R, Thomas K, McIntosh G, Abraham E, Glennie A, Jarzem P, Ahn H, Blanchard J, Hogan G, Kelly A, Charest-Morin R, Tohidi M, Hopman W, Yen D, Parent S, Miyanji F, Murphy J, El-Hawary R, Lebel D, Zeller R, Reda L, Dodds M, Lebel D, Zeller R, Zeller R, Marathe N, Bhosale S, Raj A, Marathe N, Goyal V, Theologis A, Witiw C, Fehlings M, Morash K, Yaszay B, Andras L, Sturm P, Sponseller P, El-Hawary R, Swamy G, Jacobs WB, Bouchard J, Cho R, Manson NA, Rampersaud YR, Paquet J, Bailey CS, Johnson M, Attabib N, Fisher CG, McIntosh G, Thomas KC, Bigney E, Richardson E, Alugo T, El-Mughayyar D, Vandewint A, Manson N, Abraham E, Attabib N, Prostko R, Cheng B, Haring K, Fischer M, Bourget-Murray J, Sridharan S, Frederick A, Johnston K, Edwards B, Nicholls F, Soroceanu A, Bouchard J, Shedid D, Al-Shakfa F, Shen J, Boubez G, Yuh SJ, Wang Z, Sundararajan K, Perruccio A, Coyte P, Bombardier C, Bloom J, Hawke C, Haroon N, Inman R, Rampersaud YR, Hebert J, Abraham E, Vandewint A, Bigney E, Richardson E, El-Mughayyar D, Attabib N, Small C, Manson N, Zhang H, Beresford-Cleary N, Street J, Wilson D, Oxland T, Richard-Denis A, Jean S, Bourassa-Moreau É, Fleury J, Beauchamp-Vien G, Bégin J, Mac-Thiong JM, Boudier-Revéret M, Majdalani C, Truong VT, Wang Z, Shedid D, Najjar A, Yuh SJ, Boubez G, Sebaaly A, McIntosh G, Ailon T, Dea N, Fisher C, Charest-Morin R, Lebel D, Rocos B, Zabjek K, Zeller R, Zabjek K, Rocos B, Lebel D, Zeller R, Gee A, Schneider N, Kanawati A, Schemitsch E, Bailey C, Rasoulinejad P, Zdero R, Schneider N, Gee A, Kanawati A, Zdero R, Bailey C, Rasoulinejad P, Lohkamp LN, Fehlings M, Abraham E, Vandewint A, Bigney E, Hebert J, Richardson E, El-Mughayyar D, Chorney J, El-Hawary R, Manson N, Wai E, Phan P, Kingwell S, Tierney S, Stratton A, AlDuwaisan A, Moravek D, Wai E, Kingwell S, Stratton A, Phan P, Devries Z, Barrowman N, Smit K, Tice A, Devries Z, Barrowman N, Smit K, Tice A, Sundararajan K, Rampersaud YR, Oitment C, Wunder J, Ferguson P, Rampersaud R, Rampersaud R, Rampersaud R, Ailon T, Dvorak M, Kwon B, Paquette S, Charest-Morin R, Dea N, Fisher C, Street J, Bailey C, Casha S, Glennie A, Fox R, McIntosh G, Yee A, Fisher C, Perruccio A, Perruccio A, Rampersaud YR, Mac-Thiong JM, Richard-Denis A, Gee A, Kanawati A, Rasoulinejad P, Zdero R, Bailey C, Gee A, Kanawati A, Rasoulinejad P, Zdero R, Bailey C, Klein G, Emmenegger U, Finkelstein J, Lyons F, Whyne C, Hardisty M, Millgram M, Guyer R, Harel R, Ashkenazi E, Dvorak M, Fisher C, Paquette S, Street J, Dea N, Ailon T, Charest-Morin R, Kwon B, Millgram M, Guyer R, Le Huec JC, Ashkenazi E, Millgram M, Guyer R, Harel R, Kutz S, Ashkenazi E, Parsons J, Bailey CS, Dhaliwal P, Fourney DR, Noonan V, Mac-Thiong JM, Beausejour M, Sassine S, Joncas J, Barchi S, Le May S, Cobetto N, Fortin C, Carl-Éric A, Parent S, Labelle H, Bailey C, Fisher C, Rampersaud R, Glennie A, Manson N, Bigney E, Vandewint A, Hebert J, El-Mughayyar D, Richardson E, Ghallab N, Flood M, Attabib N, Abraham E, Swamy G, Nicholls F, Thomas K, Jacobs WB, Soroceanu A, Evaniew N, Stevens M, Dunning C, Oxner W, Glennie A, Dandurand C, Paquette S, Kwon B, Ailon T, Dvorak M, Dea N, Charest-Morin R, Fisher C, Street J, Kim D, Lebel DE, Jarvis J, Tice A, Smit K, Campbell F, Mashida M, Isaac L, Bath N, Stocki D, Levin D, Koyle M, Ruskin D, Stinson J, Ailon T, Dea N, Fisher C, Evaniew N, Soroceanu A, Nicholls F, Jacobs WB, Thomas K, Cho R, Lewkonia P, Swamy G, Lasry O, Ailon T, Zamani N, Rampersaud R, Rasoulinejad P. 2021 Canadian Spine Society Abstracts. Can J Surg 2021; 64:S1-S36. [PMID: 34296831 PMCID: PMC8410468 DOI: 10.1503/cjs.012621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Arif M, Hussain N, Yasmeen A, Naz S, Anwar A, Mushtaq S, Iqbal J, Shaheen A, Aziz M, Bukhari SAH, Shah SH. Exogenous application of bio-stimulant and growth retardant improved the productivity of cotton cultivars under different planting arrangement. BRAZ J BIOL 2021; 82:e238812. [PMID: 34161424 DOI: 10.1590/1519-6984.238812] [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: 05/24/2020] [Accepted: 12/11/2020] [Indexed: 11/22/2022] Open
Abstract
Optimum planting arrangement is an important attribute for efficient utilization of available resources and to obtain high yield of cotton. Application of plant growth promoter and retardant on cotton in improved planting density are the innovative techniques in the establishment of more productive cotton crop. Therefore, we planned a field study to assess the role of bio-stimulant and growth retardant in the resource utilization efficiency of cotton cultivars planted under variable row spacing at Agronomic Research Area Bahauddin Zakariya University and Usmania Agricultural Farm Shujabad during Kharif 2012. Experimental treatments consisted of cotton genotypes viz. CIM-573 and CIM-598, cultivated under conventional (75 cm), medium (50 cm) and ultra-narrow row spacing (25 cm) with foliar spray of bio-stimulant (moringa leaf extract) and growth retardant (mepiquate chloride), either sole or in combination, keeping distilled water as a control. Exogenously applied MLE alone and MLE + MC significantly enhanced the number of squares, flowers and green bolls per plant leading to higher cotton seed and lint yield of CIM 598 cultivar cultivated under conventional row spacing. While application of MC alone and MLE + MC produced maximum micronaire value, fiber strength and fiber uniformity ratio of CIM 573 cultivar cultivated under conventional row spacing. The results suggested that application of MLE is a possible approach to enhance the cotton productivity and the use of MC to enhance the fiber quality attributes under conventional row spacing.
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Affiliation(s)
- M Arif
- Bahauddin Zakariya University, Multan, Punjab, Pakistan.,Directorate of Land Reclamation, Irrigation Department Punjab, Lahore, Pakistan
| | - N Hussain
- Bahauddin Zakariya University, Multan, Punjab, Pakistan
| | - A Yasmeen
- Bahauddin Zakariya University, Multan, Punjab, Pakistan
| | - S Naz
- Bahauddin Zakariya University, Multan, Punjab, Pakistan
| | - A Anwar
- Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Punjab, Pakistan
| | - S Mushtaq
- University of Wisconsin, Madison, USA
| | - J Iqbal
- The Ismia University of Bahawalpur, Punjab, Pakistan
| | - A Shaheen
- Govt. Sadiq College Women University Bahawalpur, Punjab, Pakistan
| | - M Aziz
- Barani Agricultural Research Institute, Chakwal, Punjab, Pakistan
| | - S A H Bukhari
- Bahauddin Zakariya University, Multan, Punjab, Pakistan
| | - S H Shah
- Allama Iqbal Open University, Islamabad, Pakistan
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Karadakhy O, Aziz M, Salama H. 560 A Rare Case Report of Cartilaginous Choristoma In Base of Tongue. Br J Surg 2021. [DOI: 10.1093/bjs/znab134.298] [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
Introduction
Choristomas are rare, benign, tumour-like growths with histologically normal morphology in an ectopic location. Choristomas can constitute of various tissue types including cartilage, bone and muscle. Chondroid tissue choristomas are referred to as cartilaginous choristomas.
Case Presentation:
A 69 year old gentleman presented with three weeks’ history of foreign body sensation in his throat. No other red flag symptoms were present. Fine nasal endoscopy was unremarkable. Magnetic resonance imaging (MRI) scan revealed mild bilateral prominence of the lingual tonsils. Patient underwent Panednoscopy and biopsy. This confirmed the presence of a cartilaginous choristoma in base of tongue.
Discussion:
This is a rare case of cartilaginous choristoma in base of tongue. It was investigated as per potential head and neck cancers. The majority of previous cases in the literature were managed using surgical resection of the lesion. In this particular case, the patient was discussed in multi-disciplinary team (MDT) meeting and managed conservatively due to the benign nature of the lesion and symptoms.
Conclusions
Cartilaginous choristomas are rare benign lesions, which can present similarly to malignant head and neck tumours. Their size and symptoms should be carefully considered before management. There is a role for conservative management in select cases.
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Affiliation(s)
- O Karadakhy
- Nottingham City Hospital, Nottingham, United Kingdom
| | - M Aziz
- Lincoln County Hospital, Lincoln, United Kingdom
| | - H Salama
- Lincoln County Hospital, Lincoln, United Kingdom
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Aziz M, Benamer M, Hany S, Sahib Y. 666 Innovations in ENT Surgery During The COVID-19 Pandemic. Br J Surg 2021. [PMCID: PMC8135846 DOI: 10.1093/bjs/znab134.019] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Introduction Severe acute respiratory syndrome coronavirus 2 (SARS-COV-2), is responsible for the coronavirus disease 2019 (COVID – 19) global pandemic. Similar coronavirus epidemics over the past years affected healthcare workers significantly. Aerosol generating procedures (AGPs) presented a unique risk to ear, nose and throat (ENT) Surgeons. We introduce various methods of reducing risk in ENT AGPs. Recommendations During trachesostomies we advocate the adoption of a specialist checklist based on ENT UK guidelines. We also advise the use of a clear drape to create a clear barrier between the patient and staff. For ear surgery we advise suturing 2 microscope pieces together end-to-end so that a clear drape can sperate the patient from surgeon. During nasal and sinus surgery, we advise attaching a clear drape to the sterile camera drape used in rigid nasal endoscopy to create a barrier between patient and surgeon. Discussion Our recommendations will create an extra barrier between the patient and the rest of healthcare team. This should reduce the risks to theatre staff from AGPs. Conclusions COVID 19 is a serious health issue affecting healthcare workers, especially during AGPs in ENT surgery. We recommend several techniques to reduce risk. These can also be used during future epidemics.
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Affiliation(s)
- M Aziz
- Lincoln county hospital, Lincoln, United Kingdom
| | - M Benamer
- Lincoln county hospital, Lincoln, United Kingdom
| | - S Hany
- Lincoln county hospital, Lincoln, United Kingdom
| | - Y Sahib
- Lincoln county hospital, Lincoln, United Kingdom
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Sahib Y, Aziz M, Benamer M. 711 Atypical Presentation of a Ruptured Thyroid Cyst. Br J Surg 2021. [DOI: 10.1093/bjs/znab134.022] [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: 11/13/2022]
Abstract
Abstract
Introduction
Thyroid cysts are a common finding with the bulk of cases being benign and approximately only 5% being malignant. The majority of these cysts are managed conservatively in the absence of malignancy or compressive symptoms.
Case
presentation
A middle-aged female patient presented with sudden onset anterior neck bruising but minimal specific symptomatology. On examination, the patient had bruising around the anterior neck and chest wall. CT and MRI scanning of the neck revealed the bruising was attributed to a ruptured thyroid cyst. On follow up, an ultrasound guided fine-needle aspirate revealed the histology to be inflammatory follicular thyroid tissue.
D
iscussion
The case demonstrated a rare presentation, given the lack of trauma in her history nor the presence of more sinister conditions as demonstrated by the fine-needle aspirate. Normally hemorrhage of thyroid cysts are due to trauma or abnormal thyroid vasculature. There are a few previous case reports of similar presentations where ruptured thyroid cysts led to life-threatening airway compromise requiring intubation. Early recognition of these thyroid cyst complications is crucial.
Conclusion
Neck and anterior chest wall hematoma can be a sign of thyroid cyst rupture/hemorrhage. It is important to recognize this sign to prevent life-threatening airway compromise.
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Affiliation(s)
- Y Sahib
- Lincoln County Hospital, Lincoln, United Kingdom
| | - M Aziz
- Lincoln County Hospital, Lincoln, United Kingdom
| | - M Benamer
- Lincoln County Hospital, Lincoln, United Kingdom
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Aziz M, Saleh H, Abd El-Rahman A. Development of a novel thermoacoustic flue-gas analyzer. AIP Advances 2020; 10. [DOI: 10.1063/5.0015982] [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] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Flue gas analyzers, such as those based on electrochemical cells and infrared sensors, are commonly used to determine the molar concentrations of the different species of flue-gas mixtures and provide information about the associated air-fuel ratio and the resulting combustion efficiency. Here, a new methodology for quaternary-gas analysis that relies on thermoacoustic technology is described for the determination of the composition of typical mixtures of flue gases [A. I. Abd El-Rahman et al., “Thermoacoustic flue-gas analyzer,” EG Patent: International Application No. PCT/EG2020/0000029 (September 23, 2020)]. The hot flue-gas mixtures resulting from the combustion of high-carbon bituminous coal and low-carbon natural gas are allowed to fill in the resonator of an optimized half-wavelength thermoacoustic engine at TH = 900 °C. Under controlled cooling, spontaneous gas–particle oscillations appear at distinct values of resonance frequencies and onset temperature gradients that particularly depend on the molar concentrations of the quaternary-gas components (CO2, CO, O2, and N2) of the introduced samples. Operational ternary diagrams along with respective sensitivity profiles are discussed in detail.
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Affiliation(s)
- M. Aziz
- The Department of Mechanical Power Engineering, Cairo University , Giza 12613, Egypt
| | - H. Saleh
- The Department of Mechanical Power Engineering, Cairo University , Giza 12613, Egypt
| | - A. Abd El-Rahman
- The Department of Mechanical Power Engineering, Cairo University , Giza 12613, Egypt
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Yahya N, Aziz F, Jaafar J, Lau WJ, Yusof N, Salleh WNW, Ismail AF, Aziz M. Impacts of Annealing Temperature on Morphological, Optical and Photocatalytic Properties of Gel-Combustion-Derived LaFeO3 Nanoparticles. Arab J Sci Eng 2020. [DOI: 10.1007/s13369-020-04874-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Missiuna P, Shen J, Nahle I, Shen J, Alanazi M, Rutges J, Rocos B, Miyanji F, Lohkamp L, Grootjen L, Hachem L, Aldebeyan S, Machida M, Padhye K, Rushton P, Jentzsch T, Jentzsch T, Lewis S, Passias P, Pierce K, Lewis S, Passias P, Nielsen C, Glennie A, Crawford E, Schneider N, Ayling O, Christie S, Greene R, Singh S, Beauchamp-Chalifour P, Balasuberamaniam P, Singh S, Mercure-Cyr R, Wilson J, Evaniew N, Martin A, Rienmueller A, Martin A, Karim M, Martin A, Cheung A, Badhiwala J, Diotalevi L, Jaja B, Fallah N, Badhiwala J, Wasim A, Manson N, Lasry O, Crawford E, Brown A, MacLean MA, Khan O, Badhiwala J, Odai KG, Bailly N, Khan O, Evaniew N, Yamamoto S, Singh M, Kashigar A, Persad A, Fernandes RJR, Malakoutian M, Ahuja C, Morris S, Stukas S, Chen T, Babadagli E, Xu M, Nater A, Oitment C, Karim M, Aziz M, Pahuta M, Versteeg A, Sundararajan K, Tanguay R, Stratton A, Cushnie D, Correale M, Sadiq I, Badhiwala J, Passias P, Badhiwala J, McGregor S, Passias P, Badhiwala J, Chen T, Singh S, Ayling O, Bond M, Rienmueller A, Chen T, Lasry O, Lyons F, Ahmed U, Inglis T, Waheed Z, Wilson J, Nater A, Pahuta M, Klein G, McKibben N, Kassam F, Clement A, Kanawati A, Shaikh N, Kanawati A, Alshammari A, Kanawati A, Yamamoto S, Hamilton K, Huschi Z, Peng YN, Huschi Z, Filgueira É, Goulet J, Kashigar A, Chen T, Hadgaonkar S, MacLean M, Chen T, Kerr HL, Meagher J, Wilson J, Stevens M, Rocos B, Pai A, Kingwell S, Thibault J, Touchette C, Moskven E, Greene R, DeVries Z, Sarraj M, Bosakhar B, Thornley P, Donnellan J, Kishta W, Darby P, Nahle I, Alzakri A, Roy-Beaudry M, Joncas J, Turgeon I, Parent S, Shen J, Alzakri A, Roy-Beaudry M, Joncas J, Turgeon I, Parent S, Samson N, Lamontagne-Proulx J, Soulet D, Tremblay Y, Praud JP, Parent S, Parent S, Gross D, Renkens J, Schlösser T, Stadhouder A, Kruyt M, Mostert A, Tee J, de Klerk L, De Kleuver M, Castelein R, Zeller R, Lewis S, Tan T, Lebel D, Rushton P, Petcharaporn M, Samdani A, Newton P, Marks M, Drake J, Dirks P, Rutka J, Kulkarni A, Ibrahim G, Taylor M, Dewan M, Zeller R, Donze S, Damen L, Rutges J, Hokken-Koelega A, Mathieu F, Lamberti-Pasculi M, Hanak B, Zeller R, Kulkarni A, Drake J, Ibrahim G, Rushton P, Ghag R, Miyanji F, Zeller R, Lewis S, Lebel D, Peiro-Garcia A, Benavides B, Parsons D, Ferri-de-Barros F, Aldebeyan S, Ghag R, Miyanji F, Kutschke L, Laux C, Kabelitz M, Schüpbach R, Böni T, Farshad M, Nielsen C, Lewis S, Lenke L, Shaffrey C, Cheung K, Berven S, Qiu Y, Matsuyama Y, Pellisé-Urquiza F, Polly D, Sembrano J, Dahl B, Kelly M, de Kleuver M, Spruit M, Alanay A, Alas H, Kim HJ, Lafage R, Soroceanu A, Hockley A, Ames C, Klineberg E, Burton D, Diebo B, Bess S, Line B, Shaffrey C, Smith J, Schwab F, Lafage V, Passias P, Lafage R, Soroceanu A, Hockley A, Line B, Klineberg E, Bess S, Protopsaltis T, Shaffrey C, Schwab F, Scheer J, Smith J, Lafage V, Ames C, Lenke L, Shaffrey C, Cheung K, Berven S, Qiu Y, Matsuyama Y, Pellisé-Urquiza F, Polly D, Sembrano J, Dahl B, Kelly M, de Kleuver M, Spruit M, Alanay A, Bortz C, Pierce K, Alas H, Brown A, Soroceanu A, Hockley A, Vira S, Ahmad W, Naessig S, Diebo B, Raman T, Protopsaltis T, Buckland A, Gerling M, Lafage R, Lafage V, Lewis S, Lenke L, Shaffrey C, Cheung K, Berven S, Qiu Y, Matsuyama Y, Pellisé-Urquiza F, Polly D, Sembrano J, Dahl B, Kelly M, de Kleuver M, Spruit M, Alanay A, Bailey C, Rampersaud R, Fisher C, Chen T, McIntosh G, Rampersaud R, Karim M, Urquhart J, Fisher C, Street J, Dvorak M, Paquette S, Charest-Morin R, Ailon T, Glennie A, Manson N, Rampersaud R, Thomas K, Rasoulinejad P, Bailey C, Ailon T, Fisher C, Greene R, Glennie A, Duquette D, LeBlanc D, Martell B, Schmidt M, Christie S, Wong DBT, Di Paola C, Ailon T, Charest-Morin R, Dea N, Dvorak M, Fisher C, Kwon B, Paquette S, Street J, Street J, Flexman A, Charest-Morin R, Wasim A, Schwartz C, Stark R, Shrikumar M, Finkelstein J, Gara A, Banaszek D, Wong T, Ailon T, Bryce E, Charest-Morin R, Dea N, Dvorak M, Fisher C, Kwon B, Paquette S, Street J, Persad A, Spiess M, Wu A, Woo A, Hnenny L, Fourney D, Joshi H, Khan O, Badhiwala J, Rampersaud R, Lewis S, Massicotte E, Fehlings M, Cadotte D, Bailey C, Christie S, Dea N, Fisher C, Paquet J, Soroceanu A, Thomas KC, Rampersaud YR, Wilson J, Manson N, Johnson M, Hall H, McIntosh G, Jacobs B, Kalsi-Ryan S, Akbar MA, Badhiwala J, Wilson J, Tetreault L, Nouri A, Rienmuller A, Massicotte E, Fehlings M, Kalsi-Ryan S, Riehm L, Martin A, Badhiwala J, Akbar M, Massicotte E, Fehlings M, Kalsi-Ryan S, Akbar MA, Badhiwala J, Wilson J, Tetreault L, Nouri A, Rienmuller A, Massicotte E, Fehlings M, Jacobs B, Johnson M, Bailey C, Christie S, Paquet J, Nataraj A, Cadotte D, Wilson J, Manson N, Hall H, Thomas K, Rampersaud R, McIntosh G, Fisher C, Dea N, Wilson J, Jentzsch T, Jiang F, Badhiwala J, Moghaddamjou A, Akbar MA, Nater A, Rienmuller A, Ganau M, Massicotte E, Fehlings M, Tu L, Manouchehri N, Kim KT, So K, Webster M, Fisk S, Tigchelaar S, Dalkilic S, Sayre E, Streijger F, Macnab A, Kwon B, Shadgan B, Wilson J, Fehlings M, Bailly N, Wagnac E, Mac-Thiong JM, Goulet J, Petit Y, Badhiwala J, Grossman R, Geisler F, Fehlings M, Wilson J, Rivers C, Kwon B, Waheed Z, Buenaventura J, Humphreys S, Noonan V, Evaniew N, Dvorak M, Wilson J, Fehlings M, Shrikumar M, Balasuberamaniam P, Rapkin B, Schwartz C, Stark R, Finkelstein J, Bigney E, Darling M, Richardson E, El-Mughayyar D, Abraham E, Street J, Radomski L, Rampersaud R, Pierce K, Bortz C, Alas H, Naessig S, Ahmad W, Vira S, Diebo B, Sciubba D, Hassanzadeh H, Hockley A, Soroceanu A, Protopsaltis T, Buckland A, Passias P, Greene R, Christie SD, Badhiwala J, Fehlings M, Witiw C, Wilson J, Fehlings M, Nessek H, Wai E, Phan P, Diotalevi L, Beauséjour MH, Wagnac E, Mac-Thiong JM, Petit Y, Badhiwala J, Fehlings M, Mazlouman S, Belley-Côté E, Jacobs B, Kwon B, Malakoutian M, Theret M, Street J, Brown S, Rossi F, Oxland T, Singh P, Chandra S, Laratta J, Carreon L, Bisson E, Ghogawala Z, Yew A, Mkorombindo T, Mummaneni P, Glassman S, Kindrachuk M, Hnenny L, Wu A, Norton J, Fourney D, Gee A, Kerr HL, Kanawati A, Zdero R, Gurr K, Bailey C, Rasoulinejad P, Yamamoto S, Sadaram S, Speidel J, Liu J, Street J, Brown S, Oxland T, Khazaei M, Walji I, Dadabhoy M, Gulati N, Aiyar N, Ostmeier S, Hasan A, Senthilnathan V, Punjani N, Yao Y, Yue S, Ozdemir G, Lou Z, Luong W, Post A, Tootsi A, Chan P, Fehlings M, Yung A, George S, Prevost V, Bauman A, Kozlowski P, Samadi F, Fournier C, Parker L, Dong K, Streijger F, Moore W, Laule C, Kwon B, Gill J, Cooper J, Dong K, Streijger F, Street J, Paquette S, Ailon T, Charest-Morin R, Fisher C, Dvorak M, Dhall S, Mac-Thiong JM, Parent S, Bailey C, Christie S, Wellington C, Kwon B, Crawford E, Zhang Y, Hardisty M, Finkelstein J, Kureshi N, Julien L, Abidi R, Christie S, Parashin S, Gascoyne T, Goytan M, Chuang J, Liu K, Quraishi N, Pasku D, Wilson J, Fehlings M, Bozzo A, Reinmuller A, Martin A, Hananel SY, Thornley P, Gazendam A, Aoude A, Nielsen C, Rampersaud R, Dea N, Versteeg A, Sahgal A, Verlaan JJ, Morin RC, Rhines L, Sciubba D, Schuster J, Weber M, Lazary A, Fehlings M, Clarke M, Arnold P, Boriani S, Laufer I, Gokaslan Z, Fisher C, Rosenzweig D, Weber M, Fisk F, Versteeg A, Fisher C, Sahgal A, Gokaslan Z, Rhines L, Boriani S, Bettegowda C, Dea N, Gal R, Charest-Morin R, Verlaan JJ, Verkooijen L, Fisher C, Perruccio A, Rampersaud R, Eckenswiller D, Yu A, Klassen K, Lewkonia P, Thomas K, Jacobs B, Miller N, Swamy G, Yang M, Soroceanu A, Phan P, Wai E, Kingwell S, Moravek D, Tierney S, Street J, Sundararajan K, Bosma R, Faclier G, Di Renna T, Rampersaud R, Frederick A, Kassam F, Nicholls F, Swamy G, Lewkonia P, Thomas K, Jacobs B, Miller N, Tanguay R, Soroceanu A, Platt A, Traynelis V, Witiw C, Horn S, Weiser-Horwitz S, Bortz C, Segreto F, Pierce K, Lafage R, Hockley A, Vira S, Lafage V, Witiw C, Wilson J, Nassiri F, da Costa L, Nathens A, Fehlings M, Jacobs B, Alas H, Pierce K, Brown A, Bortz C, Hockley A, Soroceanu A, Vira S, Naessig S, Ahmad W, Lafage R, Lafage V, Witiw C, Wilson J, da Costa L, Nathens A, Fehlings M, Crawford E, McIntosh G, Rampersaud R, Fisher C, Manson N, Thomas K, Hall H, Rampersaud R, Dea N, McIntosh G, Charest-Morin R, Investigators CSORN, Ailon T, Fisher C, Evaniew N, Aldebeyan S, Thomas K, Sundararajan K, Oitment C, Lewis S, Perruccio A, Rampersaud R, Christie S, Yee A, Fisher C, Jarzem P, Roy JF, Bouchard J, Evans D, Kwon B, Splawinski J, Warren D, Street J, Morris S, Costello J, Farrell M, Humphreys S, Kurban D, Rivers C, Jeffrey M, Juutilainen S, Casha S, Christie S, Clarke T, Drew B, Ethans K, Fehlings M, Fox R, Linassi G, Marion T, O’Connell C, Paquet J, Reid J, Scott L, Fourney D, Schouten R, Rivers C, Chen M, Nunnerley J, Croot T, Young L, Patel A, Dvorak M, Kwon B, Rivers C, Buenaventura J, Humphreys S, Noonan V, Fallah N, Evaniew N, Dvorak M, Cronin S, Badhiwala J, Ginsberg H, Fehlings M, Kwon B, Jaglal S, Wilson J, Fehlings M, Fisk F, Versteeg A, Fisher C, Sahgal A, Gokaslan Z, Rhines L, Boriani S, Bettegowda C, Dea N, Martel A, Sahgal A, Finkelstein J, Whyne C, Hardisty M, Baksh N, Nguyen T, Brown S, Jaboin J, Lin C, Yach J, Hardisty M, Whyne C, Fernandez R, Gee A, Urquhart J, Bailey C, Rasoulinejad P, Zhang H, Shewchuk J, Street J, Wilson D, Oxland T, Fernandez R, Gee A, Urquhart J, Bailey C, Rasoulinejad P, Algarni N, Aljarboa N, Jarzem P, Fernandez R, Gee A, Urquhart J, Bailey C, Rasoulinejad P, Whyte T, Van Toen C, Melnyk A, Shewchuk J, Street J, Cripton P, Oxland T, Avila M, Hurlbert RJ, Neuburger L, Ahmed SU, Cheng Y, Fourney D, Hsu HC, Kao CH, Neuburger L, Ahmed SU, Cheng Y, Fourney D, Meves R, de Oliveira AI, da Silva HC, Richard-Denis A, Petit Y, Diotalevi L, Mac-Thiong JM, Laratta J, Bisson E, Carreon L, Yew A, Mkorombindo T, Glassman S, Christie S, Bouchard J, Fisher C, Roy JF, Yee A, Jarzem P, Khurjekar K, Kothari A, Zawar A, Sanchetui P, Shyam A, Touchette C, Han JH, Christie S, Pickett G, Yee A, Bouchard J, Christie S, Fisher C, Jarzem P, Roy JF, Hashem L, Urquhart J, Rasoulinejad P, Gurr K, Siddiqi F, Bailey C, Attabib N, Bigney E, Richardson E, El-Mughayyar D, Darling M, Manson N, Abraham E, Badhiwala J, Jiang F, Wilson J, Fehlings M, Dunning C, Oxner W, Stewart S, Glennie A, Hutchinson J, Oxland T, Zhang H, Shewchuk J, Wilson D, Street J, Wilk S, Wai E, Phan P, Stratton A, Mohammed S, Tsai E, Alkerayf F, Michalowski W, Phan P, Wai E, Hoda M, MacLean M, Brunette-Clément T, Abduljabba F, Weber M, Fourney D, Charest-Morin R, Flexman A, Street J, Frey M, Mackey S, De Carvalho D, Barrowman N, Smit K, Tice A, Mervitz D, Jarvis J, Kingwell S. Canadian Spine SocietyPresentation CPSS1: Spinal insufficiency fracture in the geriatric pediatric spinePresentation CPSS2: The clinical significance of tether breakages in anterior vertebral body growth modulation: a 2-year postoperative analysisPresentation CPSS3: Anterior vertebral body growth modulation for idiopathic scoliosis: early, mid-term and late complicationsPresentation CPSS4: Ovine model of congenital chest wall and spine deformity with alterations of respiratory mechanics: follow-up from birth to 3 monthsPresentation CPSS5: Test–retest reliability and minimum detectable change of the English translation of the Italian Spine Youth Quality of Life questionnaire in adolescents with idiopathic scoliosisPresentation B1. Abstract 31: Incidence of delayed spinal cord injury in pediatric spine deformity surgery seems to be higher than previously assumedPresentation B2. Abstract 155: What is the optimal surgical method for achieving successful symptom relief in pediatric high-grade spondylolisthesis?Presentation B3. Abstract 47: Vertebral body tethering: Truly motion preserving or rather limiting?Presentation B4. Abstract 180: Fusion rates in pediatric patients after posterior cervical spine instrumentationPresentation B5. Abstract 102: Effects of 8 years of growth hormone treatment on the onset and progression of scoliosis in children with Prader–Willi syndromePresentation B6. Abstract 144: Klippel–Feil syndrome: clinical phenotypes associated with surgical treatmentPresentation B7. Abstract 123: Anterior release for idiopathic scoliosis: Is it necessary for curve correction?Presentation B8. Abstract 62: Severe scoliosis: Do we know a better way? A retrospective comparative studyPresentation B9. Abstract 21: Intraoperative skull femoral traction in adolescent idiopathic scoliosis: the correlation of traction with side-bending radiographsPresentation B10. Abstract 147: What is the effect of intraoperative halo-femoral traction on correction of adolescent idiopathic scoliosis?Presentation B11. Abstract 174: Extreme long-term outcome of surgically versus non-surgically treated patients with adolescent idiopathic scoliosisPresentation B12. Abstract 172: The influence of multilevel spinal deformity surgery on the clinical outcome in the elderly: a prospective, observational, multicentre studyPresentation B13. Abstract 49: Demographics of a prospective evaluation of elderly deformity surgery: a prospective international observational multicentre studyPresentation B14. Abstract 119: Timing of conversion to cervical malalignment and proximal junctional kyphosis following surgical correction of adult spinal deformityPresentation B15. Abstract 44: Prioritization of realignment associated with superior clinical outcomes for surgical cervical deformity patientsPresentation B16. Abstract 50: Outcome of multilevel spinal deformity surgery in patients over 60 years of age: a multicentre international prospective studyPresentation B17. Abstract 122: A simpler, modified frailty index weighted by complication occurrence correlates to pain and disability for adult spinal deformity patientsPresentation B18. Abstract 75: Change in Oswestry Disability Index at 24 months following multilevel spinal deformity surgery in patients over 60 years of age: a multicentre international prospective studyPresentation C19. Abstract 19: A prospective cohort study evaluating trends in the surgical treatment of degenerative spondylolisthesis in Canada and the utility of a novel surgical decision aidPresentation C20. Abstract 154: Decompression compared with decompression and fusion for degenerative lumbar spondylolisthesis: a Canadian Spine Outcomes and Research Network (CSORN) studyPresentation C21. Abstract ID 77: Lumbar degenerative spondylolisthesis: factors impacting decision to fusePresentation C22. Abstract 27: Patient-reported outcomes following surgery for lumbar disc herniation: comparison of a universal and multitier health care systemPresentation C23. Abstract 151: Do patients with recurrent lumbar disc herniations fair worse with discectomy than primary operations? A retrospective analysis from the Canadian Spine Outcomes and Research NetworkPresentation C24. Abstract 136: A province-wide assessment of the appropriateness of lumbar spine MRIPresentation D25. Abstract 32: Surgical site infection reduction — a 10-year quality improvement journeyPresentation D26. Abstract 34: The impact of frailty on patient-reported outcome measures following elective thoraco-lumbar spine surgeryPresentation D27. Abstract 8: Moving toward better health: exercise practice is associated with improved outcomes after spine surgeryPresentation D28. Abstract 33: Preoperative decolonization does not adversely affect the microbiologic spectrum of spine surgical site infectionPresentation D29. Abstract 61: Feedback: reducing after-hours spine cases using an encrypted messaging systemPresentation D30. Abstract 177: Complex spine surgery is safe and effective in the extremely elderly age group: results from an ambispective study of 722 patients over 75 years old from a single institutionPresentation E31. Abstract 38: Clinical predictors of achieving minimal clinically important difference after surgery for cervical spondylotic myelopathy: an external validation study from the Canadian Spine Outcomes and Research NetworkPresentation E32. Abstract 66: The natural history of degenerative cervical myelopathy: an ambispective longitudinal cohort studyPresentation E33. Abstract 159: Quantitative assessment of gait characteristics in degenerative cervical myelopathy (DCM): a prospective studyPresentation E34. Abstract 130: Prognostic factors in degenerative cervical myelopathy (DCM) for patients managed operatively and nonoperativelyPresentation E35. Abstract 175: Efficacy of surgical decompression in patients with cervical spondylotic myelopathy: results of a Canadian prospective multicentre studyPresentation E36. Abstract 67: Interobserver reliability of the modified Japanese Orthopedic Association (mJOA) score in degenerative cervical myelopathyPresentation F37. Abstract 128: Continuous optical monitoring of spinal cord hemodynamics during the first 7 days after injury in a porcine model of acute spinal cord injuryPresentation F38. Abstract 106: Development of a prediction model for central cord syndrome: an evaluation of motor recovery and the effectiveness of early surgery in a prospective, multicentre cohortPresentation F39. Abstract 135: Spinal cord dynamics under different clinical configurations of thoracolumbar burst fractures through numerical simulationsPresentation F40. Abstract 60: Predicting the heterogeneity of outcome following sensorimotor complete cervical spinal cord injury: trajectory-based analysis of 655 prospectively enrolled patientsPresentation F41. Abstract 167: Mortality in the year following discharge to the community from inpatient care for acute traumatic spinal cord injury: When and why?Presentation F42. Abstract 104: A novel method to classify patients with cervical incomplete spinal cord injury based on potential for recovery: a group-based trajectory analysis using prospective, multicentre data from over 800 patientsPresentation G43. Abstract 7: Responsiveness of standard spine outcome tools: Do they measure up?Presentation G44. Abstract 142: Patient outcomes: important psychological measuresPresentation G45. Abstract 84: Accuracy of surveillance for surgical site infections after spine surgery: a Bayesian latent class analysis using 4 independent data sourcesPresentation G46. Abstract 169: Econometric modelling: development of a surgical cost calculator for degenerative conditions of the lumbar spinePresentation G47. Abstract 124: The economic impact of nonreimbursable events in open, minimally invasive and robot-assisted lumbar fusion surgeryPresentation G48. Abstract 164: Are there sex differences in preoperative health status and health care delivery for patients undergoing scheduled lumbar surgery? An analysis from the Canadian Spine Outcomes and Research NetworkPresentation H49. Abstract 41: Patient phenotypes associated with functional outcomes after spinal cord injury: a principal component analysis in 1119 patientsPresentation H50. Abstract 103: Early versus late surgical decompression for acute traumatic spinal cord injury: a pooled analysis of prospective, multicentre data in 1548 patientsPresentation H51. Abstract 79: Clinical outcome correlation of diffusion tensor imaging and magnetic resonance imaging values: a systematic reviewPresentation H52. Abstract 137: A numerical study on the pathogenesis of central cord syndromePresentation H53. Abstract 42: Feasibility and utility of machine learning in prediction of bladder outcomes after spinal cord injury: analysis of 1250 patients from the European Multicenter Study about Spinal Cord Injury (EMSCI) registryPresentation H54. Abstract 18: Interventions to optimize spinal cord perfusion in patients with acute traumatic spinal cord injuries: a systematic reviewPresentation i55. Abstract 55: The effect of posterior lumbar spinal surgery on passive stiffness of rat paraspinal muscles 13 weeks post-surgeryPresentation i56. Abstract 43: A computed tomographic based morphometric analysis of the axis in adult populationPresentation i57. Abstract 92: Is there value to flexion–extension x-rays for degenerative spondylolisthesis? A multicentre retrospective studyPresentation i58. Abstract 98: The novel “7/20 EMG protocol” in combination with O-arm image-guided navigation for accurate lumbar pedicle placement while minimizing diagnostic radiation exposurePresentation i59. Abstract 148: Comparative biomechanical study of 2 types of transdiscal fixation implants for high-grade L5/S1 spine spondylolisthesis in a porcine modelPresentation i60. Abstract 85: The effects of fibre bundle size and vertebral level on passive stiffness of the lumbar paraspinal muscles in a rat modelPresentation J61. Abstract 157: A self-assembling peptide biomaterial to enhance human neural stem cell-based regeneration of the injured spinal cordPresentation J62. Abstract 162: Measuring demyelination, axonal loss and inflammation after human spinal cord injury with quantitative magnetic resonance imaging and histopathologyPresentation J63. Abstract 179: Characterization of ubiquitin C-terminal hydrolase L1 (UCH-L1) as a fluid biomarker of human traumatic spinal cord injuryPresentation J64. Abstract 13: Utility and role of virtual reality based simulation models in spinal decompression trainingPresentation J65. Abstract 160: Investigating the determinants for predicting surgical patient outcomes through the application of machine learning methodsPresentation J66. Abstract 143: Comparison of screw design and technique on cervical lateral mass screw fixationPresentation K67. Abstract 57: Development of clinical prognostic models for postoperative survival and quality of life in patients with surgically treated metastatic epidural spinal cord compressionPresentation K68. Abstract 170: Sarcomas of the spine: a 20-year survey of disease and treatment strategy in Ontario, CanadaPresentation K69. Abstract 15: Metastatic spine disease: Should patients with short life expectancy be denied surgical care? An international retrospective cohort studyPresentation K70. Abstract 29: Nanoparticle-functionalized polymethyl methacrylate bone cement for sustained chemotherapeutic drug deliveryPresentation K71. Abstract 90: Development of the Spine Oncology Study Group Outcomes Questionnaire – 8 Domain (SOSGOQ-8D)Presentation K72. Abstract 6: Treatment expectations of patients with spinal metastases: What do we tell our patients?Presentation L73. Abstract 48: Factors related to risk of opioid abuse in primary care patients with low back painPresentation L74. Abstract 65: QI/QA of a transitional outpatient pain program for spinePresentation L75. Abstract 168: The effect of preoperative opioid use on hospital length of stay in patients undergoing elective spine surgeryPresentation L76. Abstract 163: Disability or pain: Which best predicts patient satisfaction with surgical outcome? A Canadian Spine Outcomes and Research Network (CSORN) studyPresentation L77. Abstract 58: Rapid access to interventional pain management for lumbar nerve root pain through collaborative interprofessional provider networksPresentation L78. Abstract 63: Chronic preoperative opioid use associated with higher perioperative resource utilization and complications in adult spinal deformity patientsPresentation M79. Abstract 108: Cervical disc arthroplasty versus anterior cervical discectomy and fusion: a longitudinal analysis of reoperationsPresentation M80. Abstract 46: Preliminary results of randomized controlled trial investigating the role of psychological distress on cervical spine surgery outcomes: a baseline analysisPresentation M81. Abstract 110: Operative versus nonoperative treatment of geriatric odontoid fractures: a study of North American trauma centresPresentation M82. Abstract 74: Clinical outcome of posterior cervical foraminotomy versus anterior cervical discectomy and fusionPresentation M83. Abstract 45: “Reverse Roussouly”: ratios of cervical to thoracic shape curvature in an adult cervical deformity populationPresentation M84. Abstract 109: Treatment of acute traumatic central cord syndrome: a study of North American trauma centresPresentation N85. Abstract 118: Comparing minimally invasive versus traditional open lumbar decompression and fusion surgery: a Canadian Spine Outcomes and Research Network (CSORN) studyPresentation N86. Abstract 54: Time to return to work after lumbar spine surgeryPresentation N87. Abstract 28: Patient-reported outcomes following surgery for lumbar spinal stenosis: comparison of a universal and multitier health care systemPresentation N88. Abstract 93: Outcomes of surgery in older adults with lumbar spinal stenosisPresentation N89. Abstract 162: Functional objective assessment using the TUG test is a useful tool to evaluate outcome in lumbar spinal stenosisPresentation N90. Abstract 36: A Canadian Spine Outcomes and Research Network (CSORN) matched-cohort study comparing lumbar fusion and disk arthroplastyPresentation o91. Abstract 171: Development of clinical practice guidelines for the management of traumatic spinal column and cord injuries in British Columbia: an approach to standardizing care of spine trauma patientsPresentation o92. Abstract 22: Notes from a small island: stemming the tide of a spinal deluge. The use of encrypted software applications to ensure accountability, quality control and surgical consensus in a national acute adult spinal surgery centrePresentation o93. Abstract 129: Traumatic spinal cord injuries among Aboriginal and non-Aboriginal populations in Canada: an ambispective outcomes studyPresentation o94. Abstract 132: Traumatic spinal cord injury in New Zealand and Canada: a comparative analysisPresentation o95. Abstract 150: Exploring the reasons for readmission following traumatic spinal cord injuryPresentation o96. Abstract 59: Exploring the epidemiology and impact of spinal cord injury in the elderly: a 15-year Canadian population-based cohort studyPresentation P1. Abstract 139: Incidence and management of spinal metastasis in Ontario: a population-based studyPresentation P2. Abstract 91: A general population utility valuation study for the Spine Oncology Study Group Outcomes Questionnaire – 8DPresentation P3. Abstract 158: Metastatic vertebrae segmentation by augmented 3D convolutional neural networkPresentation P4. Abstract 73: Risk factors for failure of radiation therapy for spinal metastasesPresentation P5. Abstract 68: Significance of extracanalicular cement extravasation in thoracolumbar kyphoplastyPresentation P6. Abstract 120: Modelling fracture in osteoblastic vertebraePresentation P7. Abstract 97: The development of novel 2-in-1 patient-specific, 3D-printed laminar osteotomy guides with integrated pedicle screw guidesPresentation P8. Abstract 56: Effect of pelvic retroversion on pelvic geometry and muscle morphometry from upright magnetic resonance imagingPresentation P9. Abstract 161: Anatomic relationship between the accessory process of the lumbar spine and the pedicle screw entry pointPresentation P10. Abstract 20: Novel chair to measure lumbar spine extensors strength in adultsPresentation P11. Abstract 95: Error measurement between human spine, 3D scans, CT-based models, and 3D-printed modelsPresentation P12. Abstract 52: The diagnostic precision of computed tomography for traumatic cervical spine injury: an in vitro investigationPresentation P13. Abstract 94: Epidural abscess causing spinal cord infarctionPresentation P14. Abstract 83: The nerve root sedimentation sign on magnetic resonance imaging is not only correlated with neurogenic claudication: association with all types of leg-dominant mechanical painPresentation P15. Abstract 3: Accuracy of robot-assisted compared with freehand pedicle screw placement in spine surgery: a meta-analysis of randomized controlled trialsPresentation P16. Abstract 82: A positive nerve root sedimentation sign on magnetic resonance imaging is associated with improved surgical outcomes in patients with back dominant painPresentation P17. Abstract 16: Thoracolumbar burst fracture: McCormack load-sharing classification —systematic review and single-arm meta-analysisPresentation P18. Abstract 86: Morphological features of thoracolumbar burst fractures associated with neurologic recovery after thoracolumbar traumatic spinal cord injuryPresentation P19. Abstract 89: Radiographic parameters of listhesis and instability are not associated with health status or clinical outcomes in grade 1 degenerative spondylolisthesisPresentation P20. Abstract 37: Predictive socioeconomic factors following lumbar disk arthroplasty: a Canadian Spine Outcomes and Research Network (CSORN) studyPresentation P21. Abstract 25: Effect of in situ fusion in lumbar spondylolisthesis on clinical outcomes and spino-pelvic sagittal balancingPresentation P22. Abstract 10: Sex differences in the surgical management of lumbar degenerative disease: a systematic reviewPresentation P23. Abstract 35: Two-year results of lumbar disk arthroplasty: a Canadian Spine Outcomes and Research Network (CSORN) studyPresentation P24. Abstract 78: Does disc morphology affect the success of nonoperative treatment of chronic sciatica from a lumbar disc herniation?Presentation P25. Abstract 141: Opioid prescribing patterns: preliminary investigationPresentation P26. Abstract 133: Frailty is a better predictor of complications than age alone after surgical treatment of degenerative cervical myelopathy: an ambispective study of 5107 elderly patients from the National Surgical Quality Improvement Program databasePresentation P27. Abstract 26: Pathway analysis in spine surgery: a model for evaluating length of stayPresentation P29. Abstract 156: Patients with adolescent idiopathic scoliosis (AIS) have different cervical lordosis than the normal populationPresentation P31. Abstract 64: Investigation of thoracic spinal muscle morphology with upright magnetic resonance imagingPresentation P32. Abstract 80: Postoperative complication prediction between spinal surgeons and a machine learning model: a comparative studyPresentation P33. Abstract 81: Is using a simplified procedural classification as accurate as using current procedural terminology codes to predict future complications in spinal surgery?Presentation P34. Abstract 88: Preoperative patient performance status and frailty phenotype as predictive factors of outcome in surgically treated patients with metastatic spinal disease: a systematic literature reviewPresentation P35. Abstract 101: The measurements of frailty and their application to spine surgeryPresentation P36. Abstract 131: The effect of prolonged sitting on muscle reflexes of the low backPresentation P37. Abstract 87: Implementing a rapid discharge pathway for adolescent idiopathic scoliosis in Canada. Can J Surg 2020. [DOI: 10.1503/cjs.014720] [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: 11/01/2022] Open
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Abstract
UNLABELLED Degenerative lumbar spine disease (DLSD) is a heterogenous group of conditions that can significantly affect patients' quality of life. Lateral lumbar interbody fusion (LLIF) is one of the treatment modalities for DLSD that has been increasing in popularity over the past decade. The treatment of DLSD should be individualized based on patients' symptoms and characteristics to maximize outcomes. METHODS Literature review, invited review. RESULTS In this article, we will (1) review the use of the LLIF technique in the treatment of degenerative lumbar spine disease, (2) review the current concepts of LLIF, and (3) explore the evidence to date that will allow the reader to maximize the benefits of this technique. CONCLUSIONS LLIF is an alternative for the treatment of degenerative pathologies of the lumbar spine via indirect decompression.
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Affiliation(s)
- Oded Rabau
- McGill University Health Centre, Montreal, Quebec, Canada
- These authors contributed equally
| | | | - Mina Aziz
- McGill University Health Centre, Montreal, Quebec, Canada
| | - Alisson Teles
- McGill University Health Centre, Montreal, Quebec, Canada
| | | | | | - Jean Ouellet
- McGill University Health Centre, Montreal, Quebec, Canada
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Srinagesh HK, Ozbek U, Kapoor U, Ayuk F, Aziz M, Ben-David K, Choe H, DeFilipp Z, Etra A, Grupp SA, Hartwell MJ, Hexner E, Hogan WJ, Karol AB, Kasikis S, Kitko CL, Kowalyk S, Major-Monfried H, Lin JY, Mielke S, Merli P, Morales G, Ordemann R, Pulsipher MA, Qayed M, Reddy P, Reshef R, Roesler W, Sandhu KS, Schechter T, Shah J, Sigel K, Weber D, Wölfl M, Wudhikarn K, Young R, Levine JE, Ferrara J. The MAGIC Algorithm Probability (MAP) Is a Validated Response Biomarker of Treatment for Acute Graft-Versus-Host Disease. Biol Blood Marrow Transplant 2020. [DOI: 10.1016/j.bbmt.2019.12.123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Aziz M, Chapman KD. Fatty Acid Amide Hydrolases: An Expanded Capacity for Chemical Communication? Trends Plant Sci 2020; 25:236-249. [PMID: 31919033 DOI: 10.1016/j.tplants.2019.11.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 11/11/2019] [Accepted: 11/18/2019] [Indexed: 05/25/2023]
Abstract
Fatty acid amide hydrolase (FAAH) is an enzyme that belongs to the amidase signature (AS) superfamily and is widely distributed in multicellular eukaryotes. FAAH hydrolyzes lipid signaling molecules - namely, N-acylethanolamines (NAEs) - which terminates their actions. Recently, the crystal structure of Arabidopsis thaliana FAAH was solved and key residues were identified for substrate-specific interactions. Here, focusing on residues surrounding the substrate-binding pocket, a comprehensive analysis of FAAH sequences from angiosperms reveals a distinctly different family of FAAH-like enzymes. We hypothesize that FAAH, in addition to its role in seedling development, also acts in an N-acyl amide communication axis to facilitate plant-microbe interactions and that structural diversity provides for the flexible use of a wide range of small lipophilic signaling molecules.
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Affiliation(s)
- Mina Aziz
- BioDiscovery Institute and Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA.
| | - Kent D Chapman
- BioDiscovery Institute and Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA.
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Shaheen MA, Xiao W, Aziz M, Karim A, Saleem M, Mustaqeem M, Mehmood T, Tahir MN, Sultan A, Simair A, Lu C. Synthesis and Antibacterial Evaluation of Cu(II), Co(II), and Mn(II) Complexes with Schiff Bases Derived from 5-Aminosalicylic Acid and o-Vanillin. RUSS J GEN CHEM+ 2019. [DOI: 10.1134/s1070363219080231] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Dayaghi E, Bakhsheshi-Rad H, Hamzah E, Akhavan-Farid A, Ismail A, Aziz M, Abdolahi E. Magnesium-zinc scaffold loaded with tetracycline for tissue engineering application: In vitro cell biology and antibacterial activity assessment. Materials Science and Engineering: C 2019; 102:53-65. [DOI: 10.1016/j.msec.2019.04.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 05/25/2018] [Accepted: 04/03/2019] [Indexed: 11/16/2022]
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Al-Fakih AM, Algamal ZY, Lee MH, Aziz M, Ali HTM. A QSAR model for predicting antidiabetic activity of dipeptidyl peptidase-IV inhibitors by enhanced binary gravitational search algorithm. SAR QSAR Environ Res 2019; 30:403-416. [PMID: 31122062 DOI: 10.1080/1062936x.2019.1607899] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 04/11/2019] [Indexed: 06/09/2023]
Abstract
Time-varying binary gravitational search algorithm (TVBGSA) is proposed for predicting antidiabetic activity of 134 dipeptidyl peptidase-IV (DPP-IV) inhibitors. To improve the performance of the binary gravitational search algorithm (BGSA) method, we propose a dynamic time-varying transfer function. A new control parameter, μ , is added in the original transfer function as a time-varying variable. The TVBGSA-based model was internally and externally validated based on Qint2 , QLGO2 , QBoot2 , MSEtrain , Qext2 , MSEtest , Y-randomization test, and applicability domain evaluation. The validation results indicate that the proposed TVBGSA model is robust and not due to chance correlation. The descriptor selection and prediction performance of TVBGSA outperform BGSA method. TVBGSA shows higher Qint2 of 0.957, QLGO2 of 0.951, QBoot2 of 0.954, Qext2 of 0.938, and lower MSEtrain and MSEtest compared to obtained results by BGSA, indicating the best prediction performance of the proposed TVBGSA model. The results clearly reveal that the proposed TVBGSA method is useful for constructing reliable and robust QSARs for predicting antidiabetic activity of DPP-IV inhibitors prior to designing and experimental synthesizing of new DPP-IV inhibitors.
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Affiliation(s)
- A M Al-Fakih
- a Department of Chemistry, Faculty of Science , Universiti Teknologi Malaysia , Johor , Malaysia
- b Department of Chemistry, Faculty of Science , Sana'a University , Sana'a , Yemen
| | - Z Y Algamal
- c Department of Statistics and Informatics , University of Mosul , Mosul , Iraq
| | - M H Lee
- d Department of Mathematical Sciences, Faculty of Science , Universiti Teknologi Malaysia , Johor , Malaysia
| | - M Aziz
- a Department of Chemistry, Faculty of Science , Universiti Teknologi Malaysia , Johor , Malaysia
- e Advanced Membrane Technology Centre , Universiti Teknologi Malaysia , Johor , Malaysia
| | - H T M Ali
- f College of Computers and Information Technology , Nawroz University , Kurdistan region , Iraq
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26
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Aziz M, Wang X, Tripathi A, Bankaitis VA, Chapman KD. Structural analysis of a plant fatty acid amide hydrolase provides insights into the evolutionary diversity of bioactive acylethanolamides. J Biol Chem 2019; 294:7419-7432. [PMID: 30894416 PMCID: PMC6509493 DOI: 10.1074/jbc.ra118.006672] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 11/12/2018] [Revised: 03/20/2019] [Indexed: 01/09/2023] Open
Abstract
N-Acylethanolamines (NAEs) are fatty acid derivatives that in animal systems include the well-known bioactive metabolites of the endocannabinoid signaling pathway. Plants use NAE signaling as well, and these bioactive molecules often have oxygenated acyl moieties. Here, we report the three-dimensional crystal structures of the signal-terminating enzyme fatty acid amide hydrolase (FAAH) from Arabidopsis in its apo and ligand-bound forms at 2.1- and 3.2-Å resolutions, respectively. This plant FAAH structure revealed features distinct from those of the only other available FAAH structure (rat). The structures disclosed that although catalytic residues are conserved with the mammalian enzyme, AtFAAH has a more open substrate-binding pocket that is partially lined with polar residues. Fundamental differences in the organization of the membrane-binding "cap" and the membrane access channel also were evident. In accordance with the observed structural features of the substrate-binding pocket, kinetic analysis showed that AtFAAH efficiently uses both unsubstituted and oxygenated acylethanolamides as substrates. Moreover, comparison of the apo and ligand-bound AtFAAH structures identified three discrete sets of conformational changes that accompany ligand binding, suggesting a unique "squeeze and lock" substrate-binding mechanism. Using molecular dynamics simulations, we evaluated these conformational changes further and noted a partial unfolding of a random-coil helix within the region 531-537 in the apo structure but not in the ligand-bound form, indicating that this region likely confers plasticity to the substrate-binding pocket. We conclude that the structural divergence in bioactive acylethanolamides in plants is reflected in part in the structural and functional properties of plant FAAHs.
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Affiliation(s)
- Mina Aziz
- From the BioDiscovery Institute and Department of Biological Sciences, University of North Texas, Denton, Texas 76203 and
| | - Xiaoqiang Wang
- From the BioDiscovery Institute and Department of Biological Sciences, University of North Texas, Denton, Texas 76203 and
| | - Ashutosh Tripathi
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas 77843
| | - Vytas A Bankaitis
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas 77843
| | - Kent D Chapman
- From the BioDiscovery Institute and Department of Biological Sciences, University of North Texas, Denton, Texas 76203 and
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Abstract
The spine is one of the most common sites of bony metastases, and its involvement leads to significant patient morbidity. Surgical management in these patients is aimed at improving quality of life and functional status throughout the course of the disease. Resection of metastases often leads to critical size bone defects, presenting a challenge to achieving adequate bone regeneration to fill the void. Current treatment options for repairing these defects are bone grafting and commercial bone cements; however, each has associated limitations. Additionally, tumor recurrence and tumor-induced bone loss make bone regeneration particularly difficult. Systemic therapeutic delivery, such as bisphosphonates, have become standard of care to combat bone loss despite unfavorable systemic side-effects and lack of local efficacy. Developments from tissue engineering have introduced novel materials with osteoinductive and osteoconductive properties which also act as structural support scaffolds for bone regeneration. These new materials can also act as a therapeutic reservoir to sustainably release drugs locally as an alternative to systemic therapy. In this review, we outline recent advancements in tissue engineering and the role of translational research in developing implants that can fully repair bone defects while also delivering local therapeutics to curb tumor recurrence and improve patient quality of life.
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Affiliation(s)
- Pouyan Ahangar
- Division of Orthopedic Surgery, McGill University, Montreal, QC, Canada.,The Research Institute of the McGill University Health Centre, Injury, Repair and Recovery Program, Montreal, QC, Canada.,Montreal General Hospital C10.148.6, Montreal, QC, Canada
| | - Mina Aziz
- Division of Orthopedic Surgery, McGill University, Montreal, QC, Canada.,The Research Institute of the McGill University Health Centre, Injury, Repair and Recovery Program, Montreal, QC, Canada.,Montreal General Hospital C10.148.6, Montreal, QC, Canada.,Clinical Investigator Program, McGill University, Montreal, QC, Canada
| | - Derek H Rosenzweig
- Division of Orthopedic Surgery, McGill University, Montreal, QC, Canada.,The Research Institute of the McGill University Health Centre, Injury, Repair and Recovery Program, Montreal, QC, Canada.,Montreal General Hospital C10.148.6, Montreal, QC, Canada
| | - Michael H Weber
- Division of Orthopedic Surgery, McGill University, Montreal, QC, Canada.,The Research Institute of the McGill University Health Centre, Injury, Repair and Recovery Program, Montreal, QC, Canada.,Montreal General Hospital C10.148.6, Montreal, QC, Canada
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Etra A, Gergoudis S, Morales G, Kowalyk S, Lin JY, Shah J, Kapoor U, Aziz M, Pawarode A, Ayuk F, Holler E, Choe H, Chen YB, Rösler W, Qayed M, Hogan WJ, Wolfl M, Hexner EO, Merli P, Kitko CL, Al Malki MM, Reshef R, Wudhikarn K, Ordemann R, Pulsipher MA, Mielke S, Schechter T, Ozbek U, Ferrara J, Levine JE. Comparison of Gvhd Biomarker Algorithms for Predicting Lethal Gvhd and Non-Relapse Mortality. Biol Blood Marrow Transplant 2019. [DOI: 10.1016/j.bbmt.2018.12.131] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Al-Fakih AM, Algamal ZY, Lee MH, Aziz M, Ali HTM. QSAR classification model for diverse series of antifungal agents based on improved binary differential search algorithm. SAR QSAR Environ Res 2019; 30:131-143. [PMID: 30734580 DOI: 10.1080/1062936x.2019.1568298] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 01/08/2019] [Indexed: 06/09/2023]
Abstract
An improved binary differential search (improved BDS) algorithm is proposed for QSAR classification of diverse series of antimicrobial compounds against Candida albicans inhibitors. The transfer functions is the most important component of the BDS algorithm, and converts continuous values of the donor into discrete values. In this paper, the eight types of transfer functions are investigated to verify their efficiency in improving BDS algorithm performance in QSAR classification. The performance was evaluated using three metrics: classification accuracy (CA), geometric mean of sensitivity and specificity (G-mean), and area under the curve. The Kruskal-Wallis test was also applied to show the statistical differences between the functions. Two functions, S1 and V4, show the best classification achievement, with a slightly better performance of V4 than S1. The V4 function takes the lowest iterations and selects the fewest descriptors. In addition, the V4 function yields the best CA and G-mean of 98.07% and 0.977%, respectively. The results prove that the V4 transfer function significantly improves the performance of the original BDS.
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Affiliation(s)
- A M Al-Fakih
- a Department of Chemistry , Universiti Teknologi Malaysia , Johor , Malaysia
- b Department of Chemistry , Sana'a University , Sana'a , Yemen
| | - Z Y Algamal
- c Department of Statistics and Informatics , University of Mosul , Mosul , Iraq
| | - M H Lee
- d Department of Mathematical Sciences , Universiti Teknologi Malaysia , Johor , Malaysia
| | - M Aziz
- a Department of Chemistry , Universiti Teknologi Malaysia , Johor , Malaysia
- e Advanced Membrane Technology Centre, Universiti Teknologi Malaysia , Johor , Malaysia
| | - H T M Ali
- f College of Computers and Information Technology, Nawroz University , Kurdistan region , Iraq
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Lu S, Aziz M, Sturtevant D, Chapman KD, Guo L. Heterogeneous Distribution of Erucic Acid in Brassica napus Seeds. Front Plant Sci 2019; 10:1744. [PMID: 32082336 PMCID: PMC7001127 DOI: 10.3389/fpls.2019.01744] [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] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Accepted: 12/11/2019] [Indexed: 05/03/2023]
Abstract
Brassica napus (B. napus) is the world's most widely grown temperate oilseed crop. Although breeding for human consumption has led to removal of erucic acid from refined canola oils, there is renewed interest in the industrial uses of erucic acid derived from B. napus, and there is a rich germplasm available for use. Here, low- and high-erucic acid accessions of B. napus seeds were examined for the distribution of erucic acid-containing lipids and the gene transcripts encoding the enzymes involved in pathways for its incorporation into triacylglycerols (TAGs) across the major tissues of the seeds. In general, the results indicate that a heterogeneous distribution of erucic acid across B. napus seed tissues was contributed by two isoforms (out of six) of FATTY ACYL COA ELONGASE (FAE1) and a combination of phospholipid:diacylglycerol acyltransferase (PDAT)- and diacylglycerol acyltransferase (DGAT)-mediated incorporation of erucic acid into TAGs in cotyledonary tissues. An absence of the expression of these two FAE1 isoforms accounted for the absence of erucic acid in the TAGs of the low-erucic accession.
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Affiliation(s)
- Shaoping Lu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
| | - Mina Aziz
- Center for Plant Lipid Research and Department of Biological Sciences, University of North Texas, Denton, TX, United States
- BioDiscovery Institute, University of North Texas, Denton, TX, United States
| | - Drew Sturtevant
- Center for Plant Lipid Research and Department of Biological Sciences, University of North Texas, Denton, TX, United States
- BioDiscovery Institute, University of North Texas, Denton, TX, United States
- University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Kent D. Chapman
- Center for Plant Lipid Research and Department of Biological Sciences, University of North Texas, Denton, TX, United States
- BioDiscovery Institute, University of North Texas, Denton, TX, United States
- *Correspondence: Kent D. Chapman, ; Liang Guo,
| | - Liang Guo
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
- *Correspondence: Kent D. Chapman, ; Liang Guo,
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Passmore SR, Johnson MG, Aloraini SM, Cooper S, Aziz M, Glazebrook CM. Impact of Spinal Manipulation on Lower Extremity Motor Control in Lumbar Spinal Stenosis Patients: A Small-Scale Assessor-Blind Randomized Clinical Trial. J Manipulative Physiol Ther 2019; 42:23-33. [DOI: 10.1016/j.jmpt.2018.10.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 08/03/2018] [Accepted: 10/21/2018] [Indexed: 12/31/2022]
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Güdücü C, Olcay BO, Schäfer L, Aziz M, Schriever VA, Özgören M, Hummel T. Separating normosmic and anosmic patients based on entropy evaluation of olfactory event-related potentials. Brain Res 2018; 1708:78-83. [PMID: 30537519 DOI: 10.1016/j.brainres.2018.12.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 11/08/2018] [Accepted: 12/07/2018] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Methods based on electroencephalography (EEG) are used to evaluate brain responses to odors which is challenging due to the relatively low signal-to-noise ratio. This is especially difficult in patients with olfactory loss. In the present study, we aim to establish a method to separate functionally anosmic and normosmic individuals by means of recordings of olfactory event-related potentials (OERP) using an automated tool. Therefore, Shannon entropy was adopted to examine the complexity of the averaged electrophysiological responses. METHODS A total of 102 participants received 60 rose-like odorous stimuli at an inter-stimulus interval of 10 s. Olfactory-related brain activity was investigated within three time-windows of equal length; pre-, during-, and post-stimulus. RESULTS Based on entropy analysis, patients were correctly diagnosed for anosmia with a 75% success rate. CONCLUSION This novel approach can be expected to help clinicians to identify patients with anosmia or patients with early symptoms of neurodegenerative disorders. SIGNIFICANCE There is no automated diagnostic tool for anosmic and normosmic patients using OERP. However, detectability of OERP in patients with functional anosmia has been reported to be in the range of 50%.
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Affiliation(s)
- C Güdücü
- Dokuz Eylul University Faculty of Medicine Department of Biophysics, 35340 Balcova, Izmir, Turkey; Interdisciplinary Center "Smell and Taste", Department of Otorhinolaryngology, TU Dresden, Fetscherstrasse 74, 01307 Dresden, Germany.
| | - B O Olcay
- Izmir Institute of Technology, Faculty of Engineering, Electrical and Electronics Engineering Department, 35430 Urla, Izmir, Turkey
| | - L Schäfer
- Interdisciplinary Center "Smell and Taste", Department of Otorhinolaryngology, TU Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - M Aziz
- Interdisciplinary Center "Smell and Taste", Department of Otorhinolaryngology, TU Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - V A Schriever
- Interdisciplinary Center "Smell and Taste", Department of Otorhinolaryngology, TU Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - M Özgören
- Dokuz Eylul University Faculty of Medicine Department of Biophysics, 35340 Balcova, Izmir, Turkey
| | - T Hummel
- Interdisciplinary Center "Smell and Taste", Department of Otorhinolaryngology, TU Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
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Hartwell MJ, Özbek U, Holler E, Renteria AS, Major-Monfried H, Reddy P, Aziz M, Hogan WJ, Ayuk F, Efebera YA, Hexner EO, Bunworasate U, Qayed M, Ordemann R, Wölfl M, Mielke S, Pawarode A, Chen YB, Devine S, Harris AC, Jagasia M, Kitko CL, Litzow MR, Kröger N, Locatelli F, Morales G, Nakamura R, Reshef R, Rösler W, Weber D, Wudhikarn K, Yanik GA, Levine JE, Ferrara JL. An early-biomarker algorithm predicts lethal graft-versus-host disease and survival. JCI Insight 2018; 3:124015. [PMID: 30135313 DOI: 10.1172/jci.insight.124015] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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34
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Aziz M, Simonato M, Webb JG, Abdel-Wahab M, McElhinney D, Duncan A, Tchetche D, Barbanti M, Petronio AS, Maisano F, Ribeiro VG, Gaia DF, Rana R, Kocka V, Mathur M, Wijeysundera H, Hellig F, Nissen H, Bekeredjian R, Rihal C, Duffy SJ, Dvir D. Mortality prediction after transcatheter treatment of failed bioprosthetic aortic valves utilizing various international scoring systems: Insights from the Valve-in-Valve International Data (VIVID). Catheter Cardiovasc Interv 2018; 92:1163-1170. [PMID: 30079597 DOI: 10.1002/ccd.27714] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 04/28/2018] [Accepted: 06/10/2018] [Indexed: 11/12/2022]
Abstract
BACKGROUND Transcatheter Aortic Valve Implantation (TAVI) is commonly used to deploy new bioprosthetic valves inside degenerated surgically implanted aortic valves in high risk patients. The three scoring systems used to assess risk of postprocedural mortality are: Logistic EuroSCORE (LES), EuroSCORE II (ES II), and Society of Thoracic Surgeons (STS). OBJECTIVE The purpose of this study is to analyze the accuracy of LES, ES II, and STS in estimating all-cause mortality after transcatheter aortic valve-in-valve (ViV) implantations, which was not assessed before. METHODS Using the Valve-in-Valve International Data (VIVID) registry, a total of 1,550 patients from 110 centers were included. The study compared the observed 30-day overall mortality vs. the respective predicted mortalities calculated by risk scores. The accuracy of prediction models was assessed based on calibration and discrimination. RESULTS Observed mortality at 30 days was 5.3%, while average expected mortalities by LES, ES II and STS were 29.49 (± 17.2), 14.59 (± 8.6), and 9.61 (± 8.51), respectively. All three risk scores overestimated 30-day mortality with ratios of 0.176 (95% CI 0.138-0.214), 0.342 (95% CI 0.264-0.419), and 0.536 (95% CI 0.421-0.651), respectively. 30-day mortality ROC curves demonstrated that ES II had the largest AUC at 0.722, followed by STS at 0.704, and LES at 0.698. CONCLUSIONS All three scores overestimated mortality at 30 days with ES II showing the highest predictability compared to LES and STS; and therefore, should be recommended for ViV procedures. There is a need for a dedicated scoring system for patients undergoing ViV interventions.
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Affiliation(s)
- Mina Aziz
- St. Paul's Hospital, Vancouver, Canada
| | - Matheus Simonato
- St. Paul's Hospital, Vancouver, Canada.,Escola Paulista de Medicina - UNIFESP, São Paulo, Brazil
| | | | | | - Doff McElhinney
- Stanford University School of Medicine, Stanford, California
| | | | | | | | | | | | | | | | | | - Viktor Kocka
- Third Faculty of Medicine - Charles University, Prague, Czech Republic
| | | | | | - Farrel Hellig
- Sunninghill Hospital, Johannesburg, Republic of South Africa
| | | | | | | | | | - Danny Dvir
- St. Paul's Hospital, Vancouver, Canada.,University of Washington, Seattle, Washington
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Elsheikh M, Soliman M, Nagwa H, Elsefiy M, Dabos O, Aziz M, Asmaal H. Effect of Laser Acupuncture on Exhaled Inflammatory Bio-markers in Chronic Bronchial Asthma. J Acupunct Meridian Stud 2018. [DOI: 10.1016/j.jams.2018.08.080] [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] Open
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Lu S, Sturtevant D, Aziz M, Jin C, Li Q, Chapman KD, Guo L. Spatial analysis of lipid metabolites and expressed genes reveals tissue-specific heterogeneity of lipid metabolism in high- and low-oil Brassica napus L. seeds. Plant J 2018; 94:915-932. [PMID: 29752761 DOI: 10.1111/tpj.13959] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 04/13/2018] [Indexed: 05/20/2023]
Abstract
Despite the importance of oilseeds to worldwide human nutrition, and more recently to the production of bio-based diesel fuels, the detailed mechanisms regulating seed oil biosynthesis remain only partly understood, especially from a tissue-specific perspective. Here, we investigated the spatial distributions of lipid metabolites and transcripts involved in oil biosynthesis from seeds of two low-erucic acid genotypes of Brassica napus with high and low seed-oil content. Integrated results from matrix-assisted laser desorption/ionization-mass spectrometry imaging (MALDI-MSI) of lipids in situ, lipidome profiling of extracts from seed tissues, and tissue-specific transcriptome analysis revealed complex spatial distribution patterns of lipids and transcripts. In general, it appeared that many triacylglycerol and phosphatidylcholine species distributed heterogeneously throughout the embryos. Tissue-specific transcriptome analysis identified key genes involved in de novo fatty acid biosynthesis in plastid, triacylglycerols assembly and lipid droplet packaging in the endoplasmic reticulum (ER) that may contribute to the high or low oil phenotype and heterogeneity of lipid distribution. Our results imply that transcriptional regulation represents an important means of impacting lipid compartmentalization in oil seeds. While much information remains to be learned about the intricacies of seed oil accumulation and distribution, these studies highlight the advances that come from evaluating lipid metabolism within a spatial context and with multiple omics level datasets.
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Affiliation(s)
- Shaoping Lu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Drew Sturtevant
- Center for Plant Lipid Research and Department of Biological Sciences, University of North Texas, 1155 Union Circle #305220, Denton, TX, 76203, USA
- BioDiscovery Institute, University of North Texas, 1155 Union Circle #305220, Denton, TX, 76203, USA
| | - Mina Aziz
- Center for Plant Lipid Research and Department of Biological Sciences, University of North Texas, 1155 Union Circle #305220, Denton, TX, 76203, USA
- BioDiscovery Institute, University of North Texas, 1155 Union Circle #305220, Denton, TX, 76203, USA
| | - Cheng Jin
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Qing Li
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Kent D Chapman
- Center for Plant Lipid Research and Department of Biological Sciences, University of North Texas, 1155 Union Circle #305220, Denton, TX, 76203, USA
- BioDiscovery Institute, University of North Texas, 1155 Union Circle #305220, Denton, TX, 76203, USA
| | - Liang Guo
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
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Al-Fakih AM, Algamal ZY, Lee MH, Aziz M. A penalized quantitative structure-property relationship study on melting point of energetic carbocyclic nitroaromatic compounds using adaptive bridge penalty. SAR QSAR Environ Res 2018; 29:339-353. [PMID: 29493376 DOI: 10.1080/1062936x.2018.1439531] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Accepted: 02/07/2018] [Indexed: 06/08/2023]
Abstract
A penalized quantitative structure-property relationship (QSPR) model with adaptive bridge penalty for predicting the melting points of 92 energetic carbocyclic nitroaromatic compounds is proposed. To ensure the consistency of the descriptor selection of the proposed penalized adaptive bridge (PBridge), we proposed a ridge estimator ([Formula: see text]) as an initial weight in the adaptive bridge penalty. The Bayesian information criterion was applied to ensure the accurate selection of the tuning parameter ([Formula: see text]). The PBridge based model was internally and externally validated based on [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], the Y-randomization test, [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] and the applicability domain. The validation results indicate that the model is robust and not due to chance correlation. The descriptor selection and prediction performance of PBridge for the training dataset outperforms the other methods used. PBridge shows the highest [Formula: see text] of 0.959, [Formula: see text] of 0.953, [Formula: see text] of 0.949 and [Formula: see text] of 0.959, and the lowest [Formula: see text] and [Formula: see text]. For the test dataset, PBridge shows a higher [Formula: see text] of 0.945 and [Formula: see text] of 0.948, and a lower [Formula: see text] and [Formula: see text], indicating its better prediction performance. The results clearly reveal that the proposed PBridge is useful for constructing reliable and robust QSPRs for predicting melting points prior to synthesizing new organic compounds.
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Affiliation(s)
- A M Al-Fakih
- a Faculty of Science, Department of Chemistry , Universiti Teknologi Malaysia , Johor , Malaysia
- b Faculty of Science, Department of Chemistry , Sana'a University , Sana'a , Yemen
| | - Z Y Algamal
- c Department of Statistics and Informatics , University of Mosul , Mosul , Iraq
| | - M H Lee
- d Faculty of Science, Department of Mathematical Sciences , Universiti Teknologi Malaysia , Johor , Malaysia
| | - M Aziz
- a Faculty of Science, Department of Chemistry , Universiti Teknologi Malaysia , Johor , Malaysia
- e Advanced Membrane Technology Centre , Universiti Teknologi Malaysia , Johor , Malaysia
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Fayaz S, Eissa H, Demian G, Aziz M, Abuzallouf S. Breast Cancer in Young Women < 35 years in Kuwait: A Clinicopathological Study. Eur J Cancer 2018. [DOI: 10.1016/s0959-8049(18)30391-5] [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: 10/17/2022]
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Babaran K, Aziz M, Iwanoff C, Hidalgo R, Salamon C. Duration of the Second Stage of Labor and the Risk of Pelvic Floor Dysfunction among Primiparous Women One to Two Years Postpartum. J Minim Invasive Gynecol 2017. [DOI: 10.1016/j.jmig.2017.08.154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Whitcroft K, Aziz M, Croy I, Schriever V, Hummel T. Short inter-stimulus intervals can be used for olfactory electroencephalography in patients of varying olfactory function. Neuroscience 2017; 363:26-33. [DOI: 10.1016/j.neuroscience.2017.08.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 08/23/2017] [Accepted: 08/25/2017] [Indexed: 10/18/2022]
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42
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43
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Fayaz M, Demian G, El-Sherify M, Aziz M, Eissa H. Triple negative breast cancer: 10-year survival update of the applied treatment strategy in Kuwait. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx364.010] [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: 11/12/2022] Open
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44
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Simonato M, Azadani AN, Webb J, Leipsic J, Kornowski R, Vahanian A, Wood D, Piazza N, Kodali S, Ye J, Whisenant B, Gaia D, Aziz M, Pasala T, Mehilli J, Wijeysundera HC, Tchetche D, Moat N, Teles R, Petronio AS, Hildick-Smith D, Landes U, Windecker S, Arbel Y, Mendiz O, Makkar R, Tseng E, Dvir D. In vitro evaluation of implantation depth in valve-in-valve using different transcatheter heart valves. EUROINTERVENTION 2017; 12:909-17. [PMID: 27639744 DOI: 10.4244/eijv12i7a149] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [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: 11/23/2022]
Abstract
AIMS Transcatheter heart valve (THV) implantation in failed bioprosthetic valves (valve-in-valve [ViV]) offers an alternative therapy for high-risk patients. Elevated post-procedural gradients are a significant limitation of aortic ViV. Our objective was to assess the relationship between depth of implantation and haemodynamics. METHODS AND RESULTS Commercially available THVs used for ViV were included in the analysis (CoreValve Evolut, SAPIEN XT and the Portico valve). THVs were implanted in small surgical valves (label size 19 mm) to simulate boundary conditions. Custom-mounted pulse duplicators registered relevant haemodynamic parameters. Twenty-eight experiments were performed (13 CVE, 5 SXT and 10 Portico). Ranges of depth of implantation were: CVE: -1.2 mm to 15.7 mm; SXT: -2.2 mm to 7.5 mm; Portico: 1.4 mm to 12.1 mm. Polynomial regression established a relationship between depth of implantation and valvular mean gradients (CVE: p<0.001; SXT: p=0.01; Portico: p=0.002), as well as with EOA (CVE: p<0.001; SXT: p=0.02; Portico valve: p=0.003). In addition, leaflet coaptation was better in the high implantation experiments for all valves. CONCLUSIONS The current comprehensive bench testing assessment demonstrates the importance of high device position for the attainment of optimal haemodynamics during aortic ViV procedures.
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45
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Al-Fakih AM, Algamal ZY, Lee MH, Aziz M. A sparse QSRR model for predicting retention indices of essential oils based on robust screening approach. SAR QSAR Environ Res 2017; 28:691-703. [PMID: 28976224 DOI: 10.1080/1062936x.2017.1375010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Accepted: 08/30/2017] [Indexed: 06/07/2023]
Abstract
A robust screening approach and a sparse quantitative structure-retention relationship (QSRR) model for predicting retention indices (RIs) of 169 constituents of essential oils is proposed. The proposed approach is represented in two steps. First, dimension reduction was performed using the proposed modified robust sure independence screening (MR-SIS) method. Second, prediction of RIs was made using the proposed robust sparse QSRR with smoothly clipped absolute deviation (SCAD) penalty (RSQSRR). The RSQSRR model was internally and externally validated based on [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], Y-randomization test, [Formula: see text], [Formula: see text], and the applicability domain. The validation results indicate that the model is robust and not due to chance correlation. The descriptor selection and prediction performance of the RSQSRR for training dataset outperform the other two used modelling methods. The RSQSRR shows the highest [Formula: see text], [Formula: see text], and [Formula: see text], and the lowest [Formula: see text]. For the test dataset, the RSQSRR shows a high external validation value ([Formula: see text]), and a low value of [Formula: see text] compared with the other methods, indicating its higher predictive ability. In conclusion, the results reveal that the proposed RSQSRR is an efficient approach for modelling high dimensional QSRRs and the method is useful for the estimation of RIs of essential oils that have not been experimentally tested.
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Affiliation(s)
- A M Al-Fakih
- a Department of Chemistry , Universiti Teknologi Malaysia , Johor , Malaysia
- b Department of Chemistry, Faculty of Science , Sana'a University , Sana'a , Yemen
| | - Z Y Algamal
- c Department of Statistics and Informatics , University of Mosul , Mosul , Iraq
| | - M H Lee
- d Department of Mathematical Sciences, Faculty of Science , Universiti Teknologi Malaysia , Johor , Malaysia
| | - M Aziz
- a Department of Chemistry , Universiti Teknologi Malaysia , Johor , Malaysia
- e Advanced Membrane Technology Centre , Universiti Teknologi Malaysia , Johor , Malaysia
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46
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Aziz M, Sturtevant D, Winston J, Collakova E, Jelesko JG, Chapman KD. MALDI-MS Imaging of Urushiols in Poison Ivy Stem. Molecules 2017; 22:molecules22050711. [PMID: 28468273 PMCID: PMC6154699 DOI: 10.3390/molecules22050711] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 04/24/2017] [Accepted: 04/26/2017] [Indexed: 12/13/2022] Open
Abstract
Urushiols are the allergenic components of Toxicodendron radicans (poison ivy) as well as other Toxicodendron species. They are alk-(en)-yl catechol derivatives with a 15- or 17-carbon side chain having different degrees of unsaturation. Although several methods have been developed for analysis of urushiols in plant tissues, the in situ localization of the different urushiol congeners has not been reported. Here, we report on the first analysis of urushiols in poison ivy stems by matrix-assisted laser desorption/ionization-mass spectrometry imaging (MALDI-MSI). Our results show that the urushiol congeners with 15-carbon side chains are mainly localized to the resin ducts, while those with 17-carbon side chains are widely distributed in cortex and vascular tissues. The presence of these urushiols in stem extracts of poison ivy seedlings was confirmed by GC-MS. These novel findings provide new insights into the spatial tissue distribution of urushiols that might be biosynthetically or functionally relevant.
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Affiliation(s)
- Mina Aziz
- Department of Biological Sciences, BioDiscovery Institute, University of North Texas, Denton, TX 76203, USA.
| | - Drew Sturtevant
- Department of Biological Sciences, BioDiscovery Institute, University of North Texas, Denton, TX 76203, USA.
| | - Jordan Winston
- Department of Plant Pathology, Physiology, and Weed Science, Virginia Tech University, Blacksburg, VA 24061, USA.
| | - Eva Collakova
- Department of Plant Pathology, Physiology, and Weed Science, Virginia Tech University, Blacksburg, VA 24061, USA.
| | - John G Jelesko
- Department of Plant Pathology, Physiology, and Weed Science, Virginia Tech University, Blacksburg, VA 24061, USA.
| | - Kent D Chapman
- Department of Biological Sciences, BioDiscovery Institute, University of North Texas, Denton, TX 76203, USA.
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47
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Alnasser S, Cheema AN, Simonato M, Barbanti M, Edwards J, Kornowski R, Horlick E, Wijeysundera HC, Testa L, Bedogni F, Amrane H, Walther T, Pelletier M, Latib A, Laborde JC, Hildick-Smith D, Kim WK, Tchetche D, Agrifoglio M, Sinning JM, van Boven AJ, Kefer J, Frerker C, van Mieghem NM, Linke A, Worthley S, Asgar A, Sgroi C, Aziz M, Danenberg HD, Labinaz M, Manoharan G, Cheung A, Webb JG, Dvir D. Matched Comparison of Self-Expanding Transcatheter Heart Valves for the Treatment of Failed Aortic Surgical Bioprosthesis. Circ Cardiovasc Interv 2017; 10:CIRCINTERVENTIONS.116.004392. [DOI: 10.1161/circinterventions.116.004392] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [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] [Received: 08/14/2016] [Accepted: 03/21/2017] [Indexed: 11/16/2022]
Abstract
Background—
Transcatheter valve-in-valve implantation is an established therapy for high-risk patients with failed surgical aortic bioprosthesis. There are limited data comparing outcomes of valve-in-valve implantation using different transcatheter heart valves (THV).
Methods and Results—
Patients included in the Valve-in-Valve International Data registry (VIVID) and treated with self-expanding THV devices were analyzed using centralized core laboratory blinded to clinical events. St. Jude Medical Portico versus Medtronic CoreValve were compared in a 1:2 fashion after propensity score matching. A total of 162 patients, Portico- (n=54) and CoreValve- (n=108) based valve-in-valve procedures comprised the study population with no significant difference in baseline characteristics (age, 79±8.2 years; 60% women; mean STS [Society of Thoracic Surgery] score 8.1±5.5%). Postimplantation, CoreValve was associated with a larger effective orifice area (1.67 versus 1.31 cm
2
;
P
=0.001), lower mean gradient (14±7.5 versus 17±7.5 mm Hg;
P
=0.02), and lower core laboratory–adjudicated moderate-to-severe aortic insufficiency (4.2% versus 13.7%;
P
=0.04), compared with Portico. Procedural complications including THV malpositioning, second THV requirement, or coronary obstruction were not significantly different between the 2 groups. Survival and stroke rates at 30 days were similar, but overall mortality at 1 year was higher among patients treated with Portico compared with CoreValve (22.6% versus 9.1%;
P
=0.03).
Conclusions—
In this first matched comparison of THVs for valve-in-valve implantations, Portico and CoreValve demonstrated differences in postprocedural hemodynamics and long-term clinical outcomes. Although this could be related to THV design characteristics, the impact of other procedural factors cannot be excluded and require further evaluation.
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Affiliation(s)
- Sami Alnasser
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Asim N. Cheema
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Matheus Simonato
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Marco Barbanti
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Jeremy Edwards
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Ran Kornowski
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Eric Horlick
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Harindra C. Wijeysundera
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Luca Testa
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Francesco Bedogni
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Hafid Amrane
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Thomas Walther
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Marc Pelletier
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Azeem Latib
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Jean-Claude Laborde
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - David Hildick-Smith
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Won-Keun Kim
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Didier Tchetche
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Marco Agrifoglio
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Jan-Malte Sinning
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Ad J. van Boven
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Joëlle Kefer
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Christian Frerker
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Nicolas M. van Mieghem
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Axel Linke
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Stephen Worthley
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Anita Asgar
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Carmelo Sgroi
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Mina Aziz
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Haim D. Danenberg
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Marino Labinaz
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Ganesh Manoharan
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Anson Cheung
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - John G. Webb
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
| | - Danny Dvir
- From the St. Michael’s Hospital, Toronto, Canada (S.A., A.N.C., J.E.); St. Paul’s Hospital, Vancouver, Canada (M.S., M. Aziz, A.C., J.G.W., D.D.); Ferrarotto Hospital, University of Catania, Italy (M.B., C.S.); Rabin Medical Center, Tel Aviv, Israel (R.K.); Peter Munk Cardiac Center, Toronto, Canada (E.H.); Schulich Heart Centre, Division of Cardiology, Sunnybrook Health Sciences Centre, Toronto, Canada (H.C.W.); Department of Cardiology, IRCCS Pol. S. Donato, Milan, Italy (L.T., F.B.); Medisch
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Tandon A, Rajendran I, Aziz M, Kolamunnage-Dona R, Nunes QM, Shrotri M. Laparoscopy-assisted gastrectomy in the elderly: experience from a UK centre. Ann R Coll Surg Engl 2017; 99:325-331. [PMID: 27869493 PMCID: PMC5449677 DOI: 10.1308/rcsann.2016.0344] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 10/24/2016] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Gastric cancer has a high incidence in the elderly in the UK, with a significant number of patients aged 75 years or more. While surgery forms the mainstay of treatment, evidence pertaining to the management of gastric cancer in the Western population in this age group is scarce. METHODS We retrospectively reviewed the outcomes of laparoscopy-assisted total and distal gastrectomies at our centre from 2005 to 2015. Patients aged 70 years or above were included in the elderly group. RESULTS A total of 60 patients underwent laparoscopy-assisted gastrectomy over a 10-year period, with a predominance of male patients. There was no significant difference in the rate of overall surgical and non-surgical complications, in-hospital mortality, operation time and length of hospital stay, between the elderly and non-elderly groups. Univariate analysis, performed for risk factors relating to anastomotic leak and surgical complications, showed that age over 70 years and higher American Association of Anesthesiologists grades are associated with a higher, though not statistically significant, number of anastomotic leaks (P = 1.000 and P = 0.442, respectively) and surgical complications (P = 0.469 and P = 0.162, respectively). The recurrence rate within the first 3 years of surgery was significantly higher in the non-elderly group compared with the elderly group (Log Rank test, P = 0.002). There was no significant difference in survival between the two groups (Log Rank test, P = 0.619). CONCLUSIONS Laparoscopy-assisted gastrectomy is safe and feasible in an elderly population. There is a need for well-designed, prospective, randomised studies with quality of life data to inform our practice in future.
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Affiliation(s)
- A Tandon
- Department of General Surgery, Aintree University Hospital , Liverpool , UK
| | - I Rajendran
- Department of General Surgery, Aintree University Hospital , Liverpool , UK
| | - M Aziz
- Department of General Surgery, Aintree University Hospital , Liverpool , UK
| | - R Kolamunnage-Dona
- MRC North West Hub for Trials Methodology Research , Liverpool , UK
- Department of Biostatistics, Institute of Translational Medicine, University of Liverpool , Liverpool , UK
| | - Q M Nunes
- Department of General Surgery, Aintree University Hospital , Liverpool , UK
- NIHR Liverpool Pancreas Biomedical Research Unit, Royal Liverpool and Broadgreen University, Hospitals NHS Trust, Department of Molecular and Clinical Cancer Medicine, University of Liverpool , Liverpool , UK
| | - M Shrotri
- Department of General Surgery, Aintree University Hospital , Liverpool , UK
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Ismail A, Riaz M, Akhtar S, Yoo S, Park S, Abid M, Aziz M, Ahmad Z. Seasonal variation of aflatoxin B 1 content in dairy feed. J Anim Feed Sci 2017. [DOI: 10.22358/jafs/69008/2017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Hartwell MJ, Ozbek U, Holler E, Renteria AS, Reddy P, Aziz M, Hogan WJ, Ayuk F, Efebera YA, Hexner EO, Bunworasate U, Qayed M, Ordemann R, Wolfl M, Mielke S, Pawarode A, Chen YB, Devine SM, Harris AC, Jagasia M, Kitko CL, Litzow MR, Kroeger N, Locatelli F, Nakamura R, Reshef R, Roesler W, Weber D, Wudhikarn K, Yanik GA, Levine JE, Ferrara J. An Early Biomarker Algorithm Predicts Lethal Graft-Vs-Host Disease and Survival after Allogeneic Hematopoietic Cell Transplantation. Biol Blood Marrow Transplant 2017. [DOI: 10.1016/j.bbmt.2016.12.319] [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]
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