1
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Boerkoel P, Huynh S, Yang GX, Boerkoel CF, Patel MS, Lehman A, Terry J, Elbert A. NOTCH1 loss of the TAD and PEST domain: An antimorph? Am J Med Genet A 2023; 191:1593-1598. [PMID: 36866832 DOI: 10.1002/ajmg.a.63167] [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: 10/22/2022] [Revised: 01/05/2023] [Accepted: 02/15/2023] [Indexed: 03/04/2023]
Abstract
The Notch proteins play key roles in cell fate determination during development. Germline pathogenic variants in NOTCH1 predispose to a spectrum of cardiovascular malformations including Adams-Oliver syndrome and a wide variety of isolated complex and simple congenital heart defects. The intracellular C-terminus of the single-pass transmembrane receptor encoded by NOTCH1 contains a transcriptional activating domain (TAD) required for target gene activation and a PEST domain (a sequence rich in proline, glutamic acid, serine, and threonine), regulating protein stability and turnover. We present a patient with a novel variant encoding a truncated NOTCH1 protein without the TAD and PEST domain (NM_017617.4: c.[6626_6629del];[=], p.(Tyr2209CysfsTer38)) and extensive cardiovascular abnormalities consistent with a NOTCH1-mediated mechanism. This variant fails to promote transcription of target genes as assessed by luciferase reporter assay. Given the roles of the TAD and PEST domains in NOTCH1 function and regulation, we hypothesize that loss of both the TAD and the PEST domain results in a stable, loss-of-function protein that acts as an antimorph through competition with wild-type NOTCH1.
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Affiliation(s)
- Pierre Boerkoel
- MD Undergraduate Program, University of British Columbia, Vancouver, British Columbia, Canada
| | - Stephanie Huynh
- Provincial Medical Genetics Program, B.C. Women's Hospital, Vancouver, British Columbia, Canada
| | - Gui Xiang Yang
- Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada.,BC Children's Hospital Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Cornelius F Boerkoel
- Provincial Medical Genetics Program, B.C. Women's Hospital, Vancouver, British Columbia, Canada.,Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Millan S Patel
- Provincial Medical Genetics Program, B.C. Women's Hospital, Vancouver, British Columbia, Canada.,Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada.,BC Children's Hospital Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Anna Lehman
- Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada.,BC Children's Hospital Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jefferson Terry
- Department of Pathology and Laboratory Medicine, University of British Columbia and BC Children's Hospital, Vancouver, British Columbia, Canada
| | - Adrienne Elbert
- Provincial Medical Genetics Program, B.C. Women's Hospital, Vancouver, British Columbia, Canada.,Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
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2
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Oliwa A, Hendson G, Longman C, Synnes A, Seath K, Barnicoat A, Hall JG, Patel MS. Lethal respiratory course and additional features expand the phenotypic spectrum of PIEZO2-related distal arthrogryposis type 5. Am J Med Genet A 2023; 191:546-553. [PMID: 36317804 DOI: 10.1002/ajmg.a.63019] [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: 01/06/2022] [Revised: 09/14/2022] [Accepted: 09/20/2022] [Indexed: 11/06/2022]
Abstract
Distal arthrogryposes (DA) are a group of conditions presenting with multiple congenital contractures in the distal joints. The 10 types of DA are distinguished by different extra-articular manifestations. Heterozygous gain-of-function variants in PIEZO2 are known to cause a spectrum of DA conditions including DA type 3, DA type 5, and possibly Marden Walker syndrome, which are usually distinguished by the presence of cleft palate (DA3), ptosis and restriction in eye movements (DA5), and specific facial abnormalities and central nervous system involvement, respectively. We report on a boy with a recurrent de novo heterozygous PIEZO2 variant in exon 20 (NM_022068.3: c.2994G > A, p.(Met998Ile); NM_001378183.1: c.3069G > A, p.(Met1023Ile)), who presented at birth with DA and later developed respiratory insufficiency. His phenotype broadly fits the PIEZO2 phenotypic spectrum and potentially extends it with novel phenotypic features of pretibial linear vertical crease, immobile skin, immobile tongue, and lipid myopathy.
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Affiliation(s)
- Agata Oliwa
- Undergraduate Medical School, College of Medical, Veterinary & Life Sciences, University of Glasgow, Glasgow, UK
| | - Glenda Hendson
- Division of Neuropathology, Department of Pathology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Cheryl Longman
- West of Scotland Regional Genetics Service, Queen Elizabeth University Hospital, Glasgow, UK
| | - Anne Synnes
- Division of Neonatology, Department of Pediatrics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Kim Seath
- Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Angela Barnicoat
- Clinical Genetics Department, Great Ormond Street Hospital, London, UK
| | - Judith G Hall
- Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Millan S Patel
- Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
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3
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Handra J, Elbert A, Gazzaz N, Moller-Hansen A, Hyunh S, Lee HK, Boerkoel P, Alderman E, Anderson E, Clarke L, Hamilton S, Hamman R, Hughes S, Ip S, Langlois S, Lee M, Li L, Mackenzie F, Patel MS, Prentice LM, Sangha K, Sato L, Seath K, Seppelt M, Swenerton A, Warnock L, Zambonin JL, Boerkoel CF, Chin HL, Armstrong L. The practice of genomic medicine: A delineation of the process and its governing principles. Front Med (Lausanne) 2023; 9:1071348. [PMID: 36714130 PMCID: PMC9877428 DOI: 10.3389/fmed.2022.1071348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Accepted: 12/23/2022] [Indexed: 01/13/2023] Open
Abstract
Genomic medicine, an emerging medical discipline, applies the principles of evolution, developmental biology, functional genomics, and structural genomics within clinical care. Enabling widespread adoption and integration of genomic medicine into clinical practice is key to achieving precision medicine. We delineate a biological framework defining diagnostic utility of genomic testing and map the process of genomic medicine to inform integration into clinical practice. This process leverages collaboration and collective cognition of patients, principal care providers, clinical genomic specialists, laboratory geneticists, and payers. We detail considerations for referral, triage, patient intake, phenotyping, testing eligibility, variant analysis and interpretation, counseling, and management within the utilitarian limitations of health care systems. To reduce barriers for clinician engagement in genomic medicine, we provide several decision-making frameworks and tools and describe the implementation of the proposed workflow in a prototyped electronic platform that facilitates genomic care. Finally, we discuss a vision for the future of genomic medicine and comment on areas for continued efforts.
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Affiliation(s)
- Julia Handra
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Adrienne Elbert
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Nour Gazzaz
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada,Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada,Department of Pediatrics, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ashley Moller-Hansen
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Stephanie Hyunh
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Hyun Kyung Lee
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Pierre Boerkoel
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Emily Alderman
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Erin Anderson
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Lorne Clarke
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Sara Hamilton
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Ronnalea Hamman
- Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Shevaun Hughes
- Clinical Research Informatics, Provincial Health Services Authority, Vancouver, BC, Canada
| | - Simon Ip
- Process & Systems Improvement, Provincial Health Services Authority, Vancouver, BC, Canada
| | - Sylvie Langlois
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Mary Lee
- Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Laura Li
- Breakthrough Genomics, Irvine, CA, United States
| | - Frannie Mackenzie
- Women’s Health Research Institute, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Millan S. Patel
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Leah M. Prentice
- Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Karan Sangha
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Laura Sato
- Process & Systems Improvement, Provincial Health Services Authority, Vancouver, BC, Canada
| | - Kimberly Seath
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Margaret Seppelt
- Process & Systems Improvement, Provincial Health Services Authority, Vancouver, BC, Canada
| | - Anne Swenerton
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Lynn Warnock
- Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Jessica L. Zambonin
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Cornelius F. Boerkoel
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
| | - Hui-Lin Chin
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada,Khoo Teck Puat-National University Children’s Medical Institute, National University Hospital, Singapore, Singapore,*Correspondence: Hui-Lin Chin,
| | - Linlea Armstrong
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada,Provincial Medical Genetics Program, British Columbia Women’s Hospital and Health Centre, Vancouver, BC, Canada
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4
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Cornthwaite M, Turner K, Armstrong L, Boerkoel C, Chang C, Lehman A, Nikkel SM, Patel MS, Van Allen M, Langlois S. Impact of variation in practice in the prenatal reporting of variants of uncertain significance by commercial laboratories: NEED FOR GREATER ADHERENCE TO PUBLISHED GUIDELINES. Prenat Diagn 2022; 42:1514-1524. [PMID: 36068917 DOI: 10.1002/pd.6232] [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: 07/27/2022] [Revised: 08/26/2022] [Accepted: 08/27/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE To evaluate the impact of implementing commercial whole exome sequencing (WES) and targeted gene panel testing in pregnancies with fetal anomalies. METHODS A retrospective chart review of 124 patients with sequencing performed by commercial laboratories. RESULTS The diagnostic yield of WES and panel testing was 21.5% and 26% respectively, based on likely pathogenic (LP) or pathogenic (P) variants. Forty-two per cent of exomes and 32% of panels analyzed had one or more variant of uncertain significance (VUS) reported. A multidisciplinary in depth review of the fetal phenotype, disease phenotype, variant data, and, in some patients, additional prenatal or postnatal investigations increased the diagnostic yield by 5% for exome analysis and 6% for panel analysis. CONCLUSIONS The diagnostic yield of WES and panel testing combined was 23% based on LP and P variants. Although the reporting of VUS contributed to a 5% increase in diagnostic yield for WES and 6% for panels, the large number of VUS reported by commercial laboratories has significant resource implications. Our results support the need for greater adherence to the recommendations on the prenatal reporting of VUS and the importance of a multidisciplinary approach that brings together clinical and laboratory expertise in prenatal genetics and genomics. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- M Cornthwaite
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - K Turner
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - L Armstrong
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - C Boerkoel
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - C Chang
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - A Lehman
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - S M Nikkel
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - M S Patel
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - M Van Allen
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - S Langlois
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
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5
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Wang H, Yang GX, Hu Y, Lam P, Sangha K, Siciliano D, Swenerton A, Miller R, Tilley P, Von Dadelszen P, Kalyan S, Tang P, Patel MS. Comprehensive human amniotic fluid metagenomics supports the sterile womb hypothesis. Sci Rep 2022; 12:6875. [PMID: 35477737 PMCID: PMC9046152 DOI: 10.1038/s41598-022-10869-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 04/04/2022] [Indexed: 11/17/2022] Open
Abstract
As metagenomic approaches for detecting infectious agents have improved, each tissue that was once thought to be sterile has been found to harbor a variety of microorganisms. Controversy still exists over the status of amniotic fluid, which is part of an immunologically privileged zone that is required to prevent maternal immune system rejection of the fetus. Due to this privilege, the exclusion of microbes has been proposed to be mandatory, leading to the sterile womb hypothesis. Since nucleic acid yields from amniotic fluid are very low, contaminating nucleic acid found in water, reagents and the laboratory environment frequently confound attempts to address this hypothesis. Here we present metagenomic criteria for microorganism detection and a metagenomic method able to be performed with small volumes of starting material, while controlling for exogenous contamination, to circumvent these and other pitfalls. We use this method to show that human mid-gestational amniotic fluid has no detectable virome or microbiome, supporting the sterile womb hypothesis.
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Affiliation(s)
- HanChen Wang
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada.,Department of Physiology, McGill University, Montreal, QC, Canada
| | - Gui Xiang Yang
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Yuxiang Hu
- Department of Obstetrics and Gynaecology, University of British Columbia, Vancouver, BC, Canada.,CureImmune Therapeutics Inc., Vancouver, BC, Canada
| | - Patricia Lam
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada.,Center for Gene Therapy, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, OH, USA
| | - Karan Sangha
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Dawn Siciliano
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Anne Swenerton
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Ruth Miller
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada.,British Columbia Centre for Disease Control, Vancouver, BC, Canada.,Contextual Genomics Inc., Vancouver, BC, Canada
| | - Peter Tilley
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada.,British Columbia Centre for Disease Control, Vancouver, BC, Canada
| | - Peter Von Dadelszen
- Department of Obstetrics and Gynaecology, University of British Columbia, Vancouver, BC, Canada.,Department of Women and Children's Health, School of Life Course Sciences, King's College London, London, UK
| | - Shirin Kalyan
- Division of Endocrinology and Metabolism, Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Patrick Tang
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada.,British Columbia Centre for Disease Control, Vancouver, BC, Canada.,Department of Pathology, Sidra Medical and Research Center, Doha, Qatar
| | - Millan S Patel
- BC Children's Hospital Research Institute, University of British Columbia, Vancouver, BC, Canada. .,Department of Medical Genetics, University of British Columbia, 4500 Oak St., Rm. C234, Vancouver, BC, V6H 3N1, Canada.
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6
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Elliott AM, Adam S, du Souich C, Lehman A, Nelson TN, van Karnebeek C, Alderman E, Armstrong L, Aubertin G, Blood K, Boelman C, Boerkoel C, Bretherick K, Brown L, Chijiwa C, Clarke L, Couse M, Creighton S, Watts-Dickens A, Gibson WT, Gill H, Tarailo-Graovac M, Hamilton S, Heran H, Horvath G, Huang L, Hulait GK, Koehn D, Lee HK, Lewis S, Lopez E, Louie K, Niederhoffer K, Matthews A, Meagher K, Peng JJ, Patel MS, Race S, Richmond P, Rupps R, Salvarinova R, Seath K, Selby K, Steinraths M, Stockler S, Tang K, Tyson C, van Allen M, Wasserman W, Mwenifumbo J, Friedman JM. Genome-wide Sequencing and the Clinical Diagnosis of Genetic Disease: The CAUSES Study. Human Genetics and Genomics Advances 2022; 3:100108. [PMID: 35599849 PMCID: PMC9117924 DOI: 10.1016/j.xhgg.2022.100108] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 04/11/2022] [Indexed: 12/02/2022] Open
Abstract
Genome-wide sequencing (GWS) is a standard of care for diagnosis of suspected genetic disorders, but the proportion of patients found to have pathogenic or likely pathogenic variants ranges from less than 30% to more than 60% in reported studies. It has been suggested that the diagnostic rate can be improved by interpreting genomic variants in the context of each affected individual’s full clinical picture and by regular follow-up and reinterpretation of GWS laboratory results. Trio exome sequencing was performed in 415 families and trio genome sequencing in 85 families in the CAUSES study. The variants observed were interpreted by a multidisciplinary team including laboratory geneticists, bioinformaticians, clinical geneticists, genetic counselors, pediatric subspecialists, and the referring physician, and independently by a clinical laboratory using standard American College of Medical Genetics and Genomics (ACMG) criteria. Individuals were followed for an average of 5.1 years after testing, with clinical reassessment and reinterpretation of the GWS results as necessary. The multidisciplinary team established a diagnosis of genetic disease in 43.0% of the families at the time of initial GWS interpretation, and longitudinal follow-up and reinterpretation of GWS results produced new diagnoses in 17.2% of families whose initial GWS interpretation was uninformative or uncertain. Reinterpretation also resulted in rescinding a diagnosis in four families (1.9%). Of the families studied, 33.6% had ACMG pathogenic or likely pathogenic variants related to the clinical indication. Close collaboration among clinical geneticists, genetic counselors, laboratory geneticists, bioinformaticians, and individuals’ primary physicians, with ongoing follow-up, reanalysis, and reinterpretation over time, can improve the clinical value of GWS.
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Affiliation(s)
- Alison M Elliott
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
- Women's Health Research Institute, Vancouver, BC, Canada
| | - Shelin Adam
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Christèle du Souich
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Anna Lehman
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Tanya N Nelson
- Division of Genome Diagnostics, Department of Pathology and Laboratory Medicine, BC Children's and Women's Hospitals, Vancouver, BC, Canada
| | - Clara van Karnebeek
- Department of Pediatrics, Center for Molecular Medicine and Therapeutics, University of British Columbia, Vancouver, BC, Canada
- Department of Pediatrics, Emma Children's Hospital, Amsterdam, University Medical Centers, University of Amsterdam, Amsterdam, the Netherlands
| | - Emily Alderman
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Linlea Armstrong
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Gudrun Aubertin
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Katherine Blood
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Cyrus Boelman
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
- Division of Neurology, Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada
| | - Cornelius Boerkoel
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Karla Bretherick
- Division of Genome Diagnostics, Department of Pathology and Laboratory Medicine, BC Children's and Women's Hospitals, Vancouver, BC, Canada
| | - Lindsay Brown
- Division of Genome Diagnostics, Department of Pathology and Laboratory Medicine, BC Children's and Women's Hospitals, Vancouver, BC, Canada
| | - Chieko Chijiwa
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Lorne Clarke
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Madeline Couse
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Susan Creighton
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Abby Watts-Dickens
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - William T Gibson
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Harinder Gill
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | | | - Sara Hamilton
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Harindar Heran
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Gabriella Horvath
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
- Division of Biochemical Diseases, Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada
| | - Lijia Huang
- Division of Genome Diagnostics, Department of Pathology and Laboratory Medicine, BC Children's and Women's Hospitals, Vancouver, BC, Canada
| | - Gurdip K Hulait
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - David Koehn
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Hyun Kyung Lee
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Suzanne Lewis
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Elena Lopez
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Kristal Louie
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Karen Niederhoffer
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Allison Matthews
- Division of Genome Diagnostics, Department of Pathology and Laboratory Medicine, BC Children's and Women's Hospitals, Vancouver, BC, Canada
| | - Kirsten Meagher
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Junran J Peng
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Millan S Patel
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Simone Race
- Division of Biochemical Diseases, Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada
| | - Phillip Richmond
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Rosemarie Rupps
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Ramona Salvarinova
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
- Division of Biochemical Diseases, Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada
| | - Kimberly Seath
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Kathryn Selby
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
- Division of Neurology, Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada
| | - Michelle Steinraths
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Sylvia Stockler
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
- Division of Biochemical Diseases, Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada
| | - Kaoru Tang
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Christine Tyson
- Division of Genome Diagnostics, Department of Pathology and Laboratory Medicine, BC Children's and Women's Hospitals, Vancouver, BC, Canada
| | - Margot van Allen
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Wyeth Wasserman
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
- Department of Pediatrics, Center for Molecular Medicine and Therapeutics, University of British Columbia, Vancouver, BC, Canada
| | - Jill Mwenifumbo
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Jan M Friedman
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
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7
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Liu YA, Chijiwa C, Dunham CP, Jamieson DH, Solimano A, Schalkwyk JV, Patel MS, Lee AF. Pathologic Skull Fracture in a Near-Term Neonate with Arthrochalasia Type Ehlers-Danlos Syndrome: A Case Report. Fetal Pediatr Pathol 2022; 41:149-154. [PMID: 32338564 DOI: 10.1080/15513815.2020.1753269] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Background: Arthrochalasia type Ehlers-Danlos Syndrome (EDS) is a connective tissue disease characterized by severe generalized joint hypermobility, congenital bilateral hip dislocations, and recurrent joint subluxations and dislocations. Only one study has reported bone fragility resulting in fractures. The genetic abnormality underlying this disorder is a variant in the COL1A1 gene causing entire or partial loss of exon 6, resulting in defective type 1 collagen synthesis. Case Report: We report a female infant born at 35 weeks of gestation presenting with pathologic skull fracture following vaginal delivery. Genetic testing revealed a pathogenic variant in the COL1A1 gene (c.472-1G > C), consistent with arthrochalasia type EDS, reported previously. Conclusion: This report adds pathologic fractures to the phenotypic breadth of this type of EDS and reinforces the importance of including the condition on the differential diagnosis when early onset non-accidental injury or trauma is being considered.
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Affiliation(s)
- Yi Ariel Liu
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Chieko Chijiwa
- Department of Medical Genetics, Children's and Women's Health Centre of British Columbia, and University of British Columbia, Vancouver, British Columbia, Canada
| | - Christopher P Dunham
- Department of Pathology and Laboratory Medicine, Children's and Women's Health Centre of British Columbia, and University of British Columbia, Vancouver, British Columbia, Canada
| | - Douglas H Jamieson
- Department of Radiology, Children's and Women's Health Centre of British Columbia, and University of British Columbia, Vancouver, British Columbia, Canada
| | - Alfonso Solimano
- Division of Neonatology, Department of Pediatrics, Children's and Women's Health Centre of British Columbia, and University of British Columbia, Vancouver, British Columbia, Canada
| | - Julianne van Schalkwyk
- Department of Obstetrics and Gynaecology, Children's and Women's Health Centre of British Columbia, and University of British Columbia, Vancouver, British Columbia, Canada
| | - Millan S Patel
- Department of Medical Genetics, Children's and Women's Health Centre of British Columbia, and University of British Columbia, Vancouver, British Columbia, Canada
| | - Anna F Lee
- Department of Pathology and Laboratory Medicine, Children's and Women's Health Centre of British Columbia, and University of British Columbia, Vancouver, British Columbia, Canada
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8
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Zong Z, Kalyan S, Andres C, Akkor S, Prior JC, Patel MS. Prevalence of ocular anomalies is increased in women with polycystic ovary syndrome-exploration of association with PAX6 genotype. Ophthalmic Genet 2022; 43:340-343. [PMID: 35016586 DOI: 10.1080/13816810.2022.2025605] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
BACKGROUND Polycystic Ovarian Syndrome (PCOS), the most common reproductive endocrine disorder affecting premenopausal women, is frequently associated with central obesity and pancreatic β-cell dysfunction. Aniridia, a rare congenital eye disorder with haploinsufficiency of the PAX6 gene, was observed to co-occur with PCOS in a proband. This study investigates eye health and PAX6 genotypes of women with PCOS and controls. MATERIALS AND METHODS This is a cross-sectional study of 203 premenopausal women (100 healthy controls, 103 with PCOS) conducted at an academic medical center in Vancouver, Canada. Ophthalmological exams and detailed medical histories were obtained from each participant. DNA extracted from saliva was Sanger-sequenced for the exons, intron-exon boundaries, and untranslated regions of PAX6. RESULTS Women with PCOS had eye abnormalities, including abnormalities of the anterior segment, optic nerve, and retina, that were not observed in controls (p = 0.0002). Myopia prevalence was similar in both groups. Dry eye syndrome, by history, was markedly more prevalent in women with PCOS (22.3%) than controls (5%), p = 0.004. PAX6 genotype did not significantly differ between the two groups, nor was it associated with the greater prevalence of eye anomalies observed in women with PCOS. CONCLUSION This is the first study to systematically perform an ophthalmological examination in women with PCOS, who were found to have a higher prevalence of potentially serious eye health problems compared with controls. These data suggest that ophthalmological-metabolic-genetic connections in women with PCOS require further investigation. Confirmation of these data and increased attention to eye health in women with PCOS appears warranted.
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Affiliation(s)
- Zheyuan Zong
- Department of Medical Genetics, Faculty of Medicine and BC Children's Hospital Research Institute, University of British Columbia, Vancouver, Canada
| | - Shirin Kalyan
- Division of Endocrinology, Department of Medicine, University of British Columbia, Vancouver, Canada
| | - Cameron Andres
- Department of Medical Genetics, Faculty of Medicine and BC Children's Hospital Research Institute, University of British Columbia, Vancouver, Canada
| | - Sueda Akkor
- Department of Ophthalmology, University of British Columbia, Vancouver, Canada
| | - Jerilynn C Prior
- Division of Endocrinology, Department of Medicine, University of British Columbia, Vancouver, Canada.,Centre for Menstrual Cycle and Ovulation Research, University of British Columbia, Vancouver, Canada.,School of Population and Public Health, University of British Columbia, Vancouver, Canada.,Women's Health Research Institute, Vancouver, BC, Canada
| | - Millan S Patel
- Department of Medical Genetics, Faculty of Medicine and BC Children's Hospital Research Institute, University of British Columbia, Vancouver, Canada
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9
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Cook CB, Armstrong L, Boerkoel CF, Clarke LA, du Souich C, Demos MK, Gibson WT, Gill H, Lopez E, Patel MS, Selby K, Abu-Sharar Z, Elliott AM, Friedman JM. Somatic mosaicism detected by genome-wide sequencing in 500 parent-child trios with suspected genetic disease: clinical and genetic counseling implications. Cold Spring Harb Mol Case Stud 2021; 7:mcs.a006125. [PMID: 34697084 PMCID: PMC8751411 DOI: 10.1101/mcs.a006125] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 10/13/2021] [Indexed: 01/28/2023] Open
Abstract
Identifying genetic mosaicism is important in establishing a diagnosis, assessing recurrence risk, and providing accurate genetic counseling. Next-generation sequencing has allowed for the identification of mosaicism at levels below those detectable by conventional Sanger sequencing or chromosomal microarray analysis. The CAUSES Clinic was a pediatric translational trio-based genome-wide (exome or genome) sequencing study of 500 families (531 children) with suspected genetic disease at BC Children's and Women's Hospitals. Here we present 12 cases of apparent mosaicism identified in the CAUSES cohort: nine cases of parental mosaicism for a disease-causing variant found in a child and three cases of mosaicism in the proband for a de novo variant. In six of these cases, there was no evidence of mosaicism on Sanger sequencing—the variant was not detected on Sanger sequencing in three cases, and it appeared to be heterozygous in three others. These cases are examples of six clinical manifestations of mosaicism: a proband with classical clinical features of mosaicism (e.g., segmental abnormalities of skin pigmentation or asymmetrical growth of bilateral body parts), a proband with unusually mild manifestations of a disease, a mosaic proband who is clinically indistinguishable from the constitutive phenotype, a mosaic parent with no clinical features of the disease, a mosaic parent with mild manifestations of the disease, and a family in which both parents are unaffected and two siblings have the same disease-causing constitutional mutation. Our data demonstrate the importance of considering the possibility of mosaicism whenever exome or genome sequencing is performed and that its detection via genome-wide sequencing can permit more accurate genetic counseling.
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Affiliation(s)
- Courtney B Cook
- Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada V6H 3N1
| | - Linlea Armstrong
- Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada V6H 3N1.,BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada V5Z 4H4
| | - Cornelius F Boerkoel
- Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada V6H 3N1
| | - Lorne A Clarke
- Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada V6H 3N1
| | - Christèle du Souich
- Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada V6H 3N1.,BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada V5Z 4H4
| | - Michelle K Demos
- Division of Neurology, Department of Pediatrics, BC Children's Hospital, Vancouver, British Columbia, Canada V6H 0B3
| | - William T Gibson
- Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada V6H 3N1.,BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada V5Z 4H4
| | - Harinder Gill
- Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada V6H 3N1
| | - Elena Lopez
- Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada V6H 3N1
| | - Millan S Patel
- Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada V6H 3N1
| | - Kathryn Selby
- Division of Neurology, Department of Pediatrics, BC Children's Hospital, Vancouver, British Columbia, Canada V6H 0B3
| | - Ziad Abu-Sharar
- Division of Neurology, Department of Pediatrics, BC Children's Hospital, Vancouver, British Columbia, Canada V6H 0B3
| | | | - Alison M Elliott
- Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada V6H 3N1.,BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada V5Z 4H4.,Women's Health Research Institute, Vancouver, British Columbia, Canada V6H 2N9
| | - Jan M Friedman
- Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada V6H 3N1.,BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada V5Z 4H4
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10
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Tremblay-Laganière C, Maroofian R, Nguyen TTM, Karimiani EG, Kirmani S, Akbar F, Ibrahim S, Afroze B, Doosti M, Ashrafzadeh F, Babaei M, Efthymiou S, Christoforou M, Sultan T, Ladda RL, McLaughlin HM, Truty R, Mahida S, Cohen JS, Baranano K, Ismail FY, Patel MS, Lehman A, Edmondson AC, Nagy A, Walker MA, Mercimek-Andrews S, Maki Y, Sachdev R, Macintosh R, Palmer EE, Mancini GMS, Barakat TS, Steinfeld R, Rüsch CT, Stettner GM, Wagner M, Wortmann SB, Kini U, Brady AF, Stals KL, Ismayilova N, Ellard S, Bernardo D, Nugent K, McLean SD, Antonarakis SE, Houlden H, Kinoshita T, Campeau PM, Murakami Y. PIGG variant pathogenicity assessment reveals characteristic features within 19 families. Genet Med 2021; 23:1873-1881. [PMID: 34113002 PMCID: PMC9900493 DOI: 10.1038/s41436-021-01215-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 05/01/2021] [Accepted: 05/04/2021] [Indexed: 02/08/2023] Open
Abstract
PURPOSE Phosphatidylinositol Glycan Anchor Biosynthesis, class G (PIGG) is an ethanolamine phosphate transferase catalyzing the modification of glycosylphosphatidylinositol (GPI). GPI serves as an anchor on the cell membrane for surface proteins called GPI-anchored proteins (GPI-APs). Pathogenic variants in genes involved in the biosynthesis of GPI cause inherited GPI deficiency (IGD), which still needs to be further characterized. METHODS We describe 22 individuals from 19 unrelated families with biallelic variants in PIGG. We analyzed GPI-AP surface levels on granulocytes and fibroblasts for three and two individuals, respectively. We demonstrated enzymatic activity defects for PIGG variants in vitro in a PIGG/PIGO double knockout system. RESULTS Phenotypic analysis of reported individuals reveals shared PIGG deficiency-associated features. All tested GPI-APs were unchanged on granulocytes whereas CD73 level in fibroblasts was decreased. In addition to classic IGD symptoms such as hypotonia, intellectual disability/developmental delay (ID/DD), and seizures, individuals with PIGG variants of null or severely decreased activity showed cerebellar atrophy, various neurological manifestations, and mitochondrial dysfunction, a feature increasingly recognized in IGDs. Individuals with mildly decreased activity showed autism spectrum disorder. CONCLUSION This in vitro system is a useful method to validate the pathogenicity of variants in PIGG and to study PIGG physiological functions.
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Affiliation(s)
- Camille Tremblay-Laganière
- Department of Pediatrics, Centre Hospitalier Universitaire Sainte-Justine and University of Montreal, Montreal, QC, Canada
| | - Reza Maroofian
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology and The National Hospital for Neurology and Neurosurgery, London, UK
| | - Thi Tuyet Mai Nguyen
- Department of Pediatrics, Centre Hospitalier Universitaire Sainte-Justine and University of Montreal, Montreal, QC, Canada
| | - Ehsan Ghayoor Karimiani
- Genetics Research Centre, Molecular and Clinical Sciences Institute, St. George’s Hospital, University of London, London, UK.,Next Generation Genetic Polyclinic, Mashhad, Iran
| | - Salman Kirmani
- Department of Pediatrics & Child Health, Aga Khan University, Karachi, Pakistan
| | - Fizza Akbar
- Department of Pediatrics & Child Health, Aga Khan University, Karachi, Pakistan
| | - Shahnaz Ibrahim
- Department of Pediatrics & Child Health, Aga Khan University, Karachi, Pakistan
| | - Bushra Afroze
- Department of Pediatrics & Child Health, Aga Khan University, Karachi, Pakistan
| | | | - Farah Ashrafzadeh
- Department of Pediatric Neurology, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Meisam Babaei
- Department of Pediatrics, North Khorasan University of Medical Sciences, Bojnurd, Iran
| | - Stephanie Efthymiou
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology and The National Hospital for Neurology and Neurosurgery, London, UK
| | - Marilena Christoforou
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology and The National Hospital for Neurology and Neurosurgery, London, UK
| | - Tipu Sultan
- Department of Pediatric Neurology, Institute of Child Health, The Children’s Hospital Lahore, Lahore, Pakistan
| | - Roger L. Ladda
- Department of Pediatrics, Milton S Hershey Medical Centre, Hershey, PA, USA
| | | | | | - Sonal Mahida
- Division of Neurogenetics, Kennedy Krieger Institute, Baltimore, MD, USA
| | - Julie S. Cohen
- Division of Neurogenetics, Kennedy Krieger Institute, Baltimore, MD, USA.,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Kristin Baranano
- Division of Neurogenetics, Kennedy Krieger Institute, Baltimore, MD, USA.,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Fatima Y. Ismail
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Pediatrics, United Arab Emirates University, Al Ain, UAE
| | - Millan S. Patel
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Anna Lehman
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Andrew C. Edmondson
- Division of Human Genetics, Department of Pediatrics, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Amanda Nagy
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA
| | - Melissa A. Walker
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA
| | - Saadet Mercimek-Andrews
- Division of Clinical and Metabolic Genetics, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, ON, Canada.,Department of Medical Genetics, Faculty of Medicine & Dentistry, University of Alberta, Stollery Children’s Hospital, Alberta Health Services, Edmonton, AB, Canada
| | - Yuta Maki
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka, Japan.,Project Research Center for Fundamental Sciences, Graduate School of Science, Osaka University, Toyonaka, Osaka, Japan
| | - Rani Sachdev
- Sydney Children’s Hospital, Centre for Clinical Genetics, Sydney Children’s Hospital, High St, Randwick, UK.,School of Women’s and Children’s Health, University of New South Wales, High St, Randwick, UK
| | - Rebecca Macintosh
- Sydney Children’s Hospital, Centre for Clinical Genetics, Sydney Children’s Hospital, High St, Randwick, UK
| | - Elizabeth E. Palmer
- Sydney Children’s Hospital, Centre for Clinical Genetics, Sydney Children’s Hospital, High St, Randwick, UK.,School of Women’s and Children’s Health, University of New South Wales, High St, Randwick, UK
| | - Grazia M. S. Mancini
- Department of Clinical Genetics, Erasmus MC University Medical Center, Rotterdam, The Netherlands, CA, Rotterdam, The Netherlands
| | - Tahsin Stefan Barakat
- Department of Clinical Genetics, Erasmus MC University Medical Center, Rotterdam, The Netherlands, CA, Rotterdam, The Netherlands
| | - Robert Steinfeld
- Department of Pediatric Neurology, University Children’s Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Christina T. Rüsch
- Department of Pediatric Neurology, University Children’s Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Georg M. Stettner
- Department of Pediatric Neurology, University Children’s Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Matias Wagner
- Institute of Human Genetics, School of Medicine, Technical University Munich, Munich, Germany.,Institute for Neurogenomics Helmholtz Zentrum München, Neuherberg, Germany
| | - Saskia B. Wortmann
- University Children’s Hospital, Paracelsus Medical School, Salzburg, Austria.,Amalias Children’s Hospital, RadboudUMC, Nijmegen, the Netherlands
| | - Usha Kini
- Oxford Centre for Genomic Medicine, Oxford University Hospitals NHS Trust, Oxford, UK
| | - Angela F. Brady
- North West Thames Regional Genetics Service, London North West University Healthcare NHS Trust, Northwick Park Hospital, Harrow, UK
| | - Karen L. Stals
- Exeter Genomics Laboratory, Royal Devon and Exeter NHS Foundation Trust, Exeter, UK
| | - Naila Ismayilova
- Department of Paediatric Neurology, Chelsea and Westminster Hospital, London, UK
| | - Sian Ellard
- Exeter Genomics Laboratory, Royal Devon and Exeter NHS Foundation Trust, Exeter, UK.,Institute of Biomedical and Clinical Science, College of Medicine and Health, University of Exeter, Exeter, UK
| | - Danilo Bernardo
- University of California San Francisco, Clinical Neurology, San Francisco, CA, UK
| | - Kimberly Nugent
- Department of Pediatrics, Baylor College of Medicine, The Children’s Hospital of San Antonio, San Antonio, TX, USA
| | - Scott D. McLean
- Department of Pediatrics, Baylor College of Medicine, The Children’s Hospital of San Antonio, San Antonio, TX, USA
| | - Stylianos E. Antonarakis
- Department of Genetic Medicine and Development, University of Geneva Medical School, Geneva, Switzerland
| | - Henry Houlden
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology and The National Hospital for Neurology and Neurosurgery, London, UK
| | - Taroh Kinoshita
- Yabumoto Department of Intractable Disease Research, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan.,Department of Immunoglycobiology, World Premier International Immunology Frontier Research Center, Osaka University, Osaka, Japan
| | - Philippe M. Campeau
- Department of Pediatrics, Centre Hospitalier Universitaire Sainte-Justine and University of Montreal, Montreal, QC, Canada
| | - Yoshiko Murakami
- Yabumoto Department of Intractable Disease Research, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan.,Department of Immunoglycobiology, World Premier International Immunology Frontier Research Center, Osaka University, Osaka, Japan
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11
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Szot JO, Slavotinek A, Chong K, Brandau O, Nezarati M, Cueto-González AM, Patel MS, Devine WP, Rego S, Acyinena AP, Shannon P, Myles-Reid D, Blaser S, Mieghem TV, Yavuz-Kienle H, Skladny H, Miller K, Riera MDT, Martínez SA, Tizzano EF, Dupuis L, James Stavropoulos D, McNiven V, Mendoza-Londono R, Elliott AM, Phillips RS, Chapman G, Dunwoodie SL. New cases that expand the genotypic and phenotypic spectrum of Congenital NAD Deficiency Disorder. Hum Mutat 2021; 42:862-876. [PMID: 33942433 DOI: 10.1002/humu.24211] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 03/31/2021] [Accepted: 04/19/2021] [Indexed: 12/19/2022]
Abstract
Nicotinamide adenine dinucleotide (NAD) is an essential coenzyme involved in over 400 cellular reactions. During embryogenesis, mammals synthesize NAD de novo from dietary l -tryptophan via the kynurenine pathway. Biallelic, inactivating variants in three genes encoding enzymes of this biosynthesis pathway (KYNU, HAAO, and NADSYN1) disrupt NAD synthesis and have been identified in patients with multiple malformations of the heart, kidney, vertebrae, and limbs; these patients have Congenital NAD Deficiency Disorder HAAO and four families with biallelic variants in KYNU. These patients present similarly with multiple malformations of the heart, kidney, vertebrae, and limbs, of variable severity. We show that each variant identified in these patients results in loss-of-function, revealed by a significant reduction in NAD levels via yeast genetic complementation assays. For the first time, missense mutations are identified as a cause of malformation and shown to disrupt enzyme function. These missense and frameshift variants cause moderate to severe NAD deficiency in yeast, analogous to insufficient synthesized NAD in patients. We hereby expand the genotypic and corresponding phenotypic spectrum of Congenital NAD Deficiency Disorder.
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Affiliation(s)
- Justin O Szot
- Victor Chang Cardiac Research Institute, Sydney, New South Wales, Australia
| | - Anne Slavotinek
- Department of Pediatrics, University of California San Francisco, San Francisco, California, USA
| | - Karen Chong
- Prenatal Diagnosis and Medical Genetics Program, Department of Obstetrics and Gynecology, Mount Sinai Hospital, Toronto, Ontario, Canada
| | | | - Marjan Nezarati
- Genetics Program, North York General Hospital, Toronto, Ontario, Canada
- Department of Paediatrics, University of Toronto, Toronto, Ontario, Canada
| | - Anna M Cueto-González
- Department of Clinical and Molecular Genetics, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - Millan S Patel
- Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Walter P Devine
- Department of Anatomic Pathology, University of California, San Francisco, California, USA
| | - Shannon Rego
- Department of Pediatrics, University of California San Francisco, San Francisco, California, USA
| | - Alicia P Acyinena
- Department of Pediatrics, University of California San Francisco, San Francisco, California, USA
| | - Patrick Shannon
- Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Diane Myles-Reid
- Prenatal Diagnosis and Medical Genetics Program, Department of Obstetrics and Gynecology, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Susan Blaser
- The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Tim V Mieghem
- Fetal Medicine Program, Department of Obstetrics and Gynecology, Mount Sinai Hospital, Toronto, Ontario, Canada
| | | | | | - Kristen Miller
- Genetics Program, North York General Hospital, Toronto, Ontario, Canada
| | - Miereia D T Riera
- Metabolic Unit and Pediatric Neurology Department, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - Silvia A Martínez
- Fetal Medicine Unit and Obstetrics Department, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - Eduardo F Tizzano
- Department of Clinical and Molecular Genetics, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
- Medicine Genetics Group, Vall d'Hebron Research Institute, Vall d'Hebron Barcelona Hospital Campus, Autonomous University of Barcelona, Barcelona, Spain
| | - Lucie Dupuis
- Department of Pediatrics, Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Dimitri James Stavropoulos
- Genome Diagnostics, Department of Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Vanda McNiven
- Department of Pediatrics, Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Roberto Mendoza-Londono
- Department of Pediatrics, Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Alison M Elliott
- Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Robert S Phillips
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia, USA
- Department of Chemistry, University of Georgia, Athens, Georgia, USA
| | - Gavin Chapman
- Victor Chang Cardiac Research Institute, Sydney, New South Wales, Australia
- Faculty of Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | - Sally L Dunwoodie
- Victor Chang Cardiac Research Institute, Sydney, New South Wales, Australia
- Faculty of Medicine, University of New South Wales, Sydney, New South Wales, Australia
- Faculty of Science, University of New South Wales, Sydney, New South Wales, Australia
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12
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Shukla P, Yadav S, Patel MS, Kumar P, Kumar N, Kumar L. The effects of cesium lead bromide quantum dots on the performance of copper phthalocyanine-based organic field-effect transistors. Nanotechnology 2021; 32:195208. [PMID: 33503597 DOI: 10.1088/1361-6528/abe070] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Highly luminescent all-inorganic cesium lead bromide (CsPbBr3) perovskite quantum dots (QDs) have been extensively used as a photosensitizer in optoelectronic devices, while p-type small-organic-molecule copper phthalocyanine (CuPc) is also widely used as a photoactive material in solar cells, organic field-effect transistors (OFETs), etc. In this paper, we report the preparation of a CsPbBr3-QDs/CuPc heterostructure to study the effect of CsPbBr3-QDs on CuPc. The optical properties of both CuPc and the QDs/CuPc heterostructure were compared and contrasted using UV-vis absorbance and photoluminescence (PL) measurements. Furthermore, to study their electronic and charge transfer features, we fabricated field-effect transistors (FETs) on both pristine CuPc and QDs/CuPc heterostructure thin films and studied their photoresponsive electrical characteristics. Both pristine and QDs/CuPc-based FETs showed an enhancement in current and carrier mobility under illumination. The enhancement in the current and carrier mobility of the QDs/CuPc-based FETs is due to a large number of photoexcited charge carriers. We also observed that the current and carrier mobility in the QDs/CuPc heterostructure-based FET were lower than those of the pristine CuPc-based FET. This can be explained by the n-type doping effect of CsPbBr3 QDs on CuPc, which reduces the accumulation of holes in the active p-channel near the insulating layer and causes charge to be transferred from the QDs to the CuPc. Thus, we have observed a charge transfer effect in the CsPbBr3 QDs/CuPc heterostructure, which can be used in optoelectronic devices.
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Affiliation(s)
- Preeti Shukla
- Molecular Electronics Research Laboratory, Physics Department, Faculty of Science, University of Allahabad, Prayagraj-211 002, India
| | - Sarita Yadav
- Molecular Electronics Research Laboratory, Physics Department, Faculty of Science, University of Allahabad, Prayagraj-211 002, India
| | - M S Patel
- Molecular Electronics Research Laboratory, Physics Department, Faculty of Science, University of Allahabad, Prayagraj-211 002, India
| | - Pramendra Kumar
- Department of Applied Chemistry, IET, M. J. P. Rohilkhand University, Bareilly-243 006, India
| | - Naresh Kumar
- Department of Physics, MNNIT-Allahabad, Prayagraj-211 002, India
| | - Lokendra Kumar
- Molecular Electronics Research Laboratory, Physics Department, Faculty of Science, University of Allahabad, Prayagraj-211 002, India
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13
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Ye XC, Roslin NM, Paterson AD, Lyons CJ, Pegado V, Richmond P, Shyr C, Fornes O, Han X, Higginson M, Ross CJ, Giaschi D, Gregory-Evans C, Patel MS, Wasserman WW. Linkage analysis identifies an isolated strabismus locus at 14q12 overlapping with FOXG1 syndrome region. J Med Genet 2020; 59:46-55. [PMID: 33257509 PMCID: PMC8685624 DOI: 10.1136/jmedgenet-2020-107226] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 09/05/2020] [Accepted: 09/29/2020] [Indexed: 11/21/2022]
Abstract
Strabismus is a common condition, affecting 1%–4% of individuals. Isolated strabismus has been studied in families with Mendelian inheritance patterns. Despite the identification of multiple loci via linkage analyses, no specific genes have been identified from these studies. The current study is based on a seven-generation family with isolated strabismus inherited in an autosomal dominant manner. A total of 13 individuals from a common ancestor have been included for linkage analysis. Among these, nine are affected and four are unaffected. A single linkage signal has been identified at an 8.5 Mb region of chromosome 14q12 with a multipoint LOD (logarithm of the odds) score of 4.69. Disruption of this locus is known to cause FOXG1 syndrome (or congenital Rett syndrome; OMIM #613454 and *164874), in which 84% of affected individuals present with strabismus. With the incorporation of next-generation sequencing and in-depth bioinformatic analyses, a 4 bp non-coding deletion was prioritised as the top candidate for the observed strabismus phenotype. The deletion is predicted to disrupt regulation of FOXG1, which encodes a transcription factor of the Forkhead family. Suggestive of an autoregulation effect, the disrupted sequence matches the consensus FOXG1 and Forkhead family transcription factor binding site and has been observed in previous ChIP-seq studies to be bound by Foxg1 in early mouse brain development. Future study of this specific deletion may shed light on the regulation of FOXG1 expression and may enhance our understanding of the mechanisms contributing to strabismus and FOXG1 syndrome.
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Affiliation(s)
- Xin Cynthia Ye
- Centre for Molecular Medicine and Therapeutics, The University of British Columbia, Vancouver, British Columbia, Canada.,Department of Medical Genetics, The University of British Columbia, Vancouver, British Columbia, Canada.,BC Children's Hospital Research Institute, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Nicole M Roslin
- The Centre for Applied Genomics, Hospital for Sick Children Research Institute, University of Toronto, Toronto, Ontario, Canada
| | - Andrew D Paterson
- The Centre for Applied Genomics, Hospital for Sick Children Research Institute, University of Toronto, Toronto, Ontario, Canada.,Genetics and Genome Biology, Hospital for Sick Children, Toronto, Ontario, Canada.,Divisions of Epidemiology and Biostatistics, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | - Christopher J Lyons
- BC Children's Hospital Research Institute, The University of British Columbia, Vancouver, British Columbia, Canada.,Department of Ophthalmology and Visual Sciences, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Victor Pegado
- Department of Ophthalmology and Visual Sciences, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Phillip Richmond
- Centre for Molecular Medicine and Therapeutics, The University of British Columbia, Vancouver, British Columbia, Canada.,BC Children's Hospital Research Institute, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Casper Shyr
- Centre for Molecular Medicine and Therapeutics, The University of British Columbia, Vancouver, British Columbia, Canada.,BC Children's Hospital Research Institute, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Oriol Fornes
- Centre for Molecular Medicine and Therapeutics, The University of British Columbia, Vancouver, British Columbia, Canada.,BC Children's Hospital Research Institute, The University of British Columbia, Vancouver, British Columbia, Canada
| | - XiaoHua Han
- Centre for Molecular Medicine and Therapeutics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Michelle Higginson
- Centre for Molecular Medicine and Therapeutics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Colin J Ross
- Faculty of Pharmaceutical Sciences, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Deborah Giaschi
- BC Children's Hospital Research Institute, The University of British Columbia, Vancouver, British Columbia, Canada.,Department of Ophthalmology and Visual Sciences, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Cheryl Gregory-Evans
- Department of Ophthalmology and Visual Sciences, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Millan S Patel
- Department of Medical Genetics, The University of British Columbia, Vancouver, British Columbia, Canada .,BC Children's Hospital Research Institute, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Wyeth W Wasserman
- Centre for Molecular Medicine and Therapeutics, The University of British Columbia, Vancouver, British Columbia, Canada .,Department of Medical Genetics, The University of British Columbia, Vancouver, British Columbia, Canada.,BC Children's Hospital Research Institute, The University of British Columbia, Vancouver, British Columbia, Canada
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14
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Zhang LX, Lemire G, Gonzaga-Jauregui C, Molidperee S, Galaz-Montoya C, Liu DS, Verloes A, Shillington AG, Izumi K, Ritter AL, Keena B, Zackai E, Li D, Bhoj E, Tarpinian JM, Bedoukian E, Kukolich MK, Innes AM, Ediae GU, Sawyer SL, Nair KM, Soumya PC, Subbaraman KR, Probst FJ, Bassetti JA, Sutton RV, Gibbs RA, Brown C, Boone PM, Holm IA, Tartaglia M, Ferrero GB, Niceta M, Dentici ML, Radio FC, Keren B, Wells CF, Coubes C, Laquerrière A, Aziza J, Dubucs C, Nampoothiri S, Mowat D, Patel MS, Bracho A, Cammarata-Scalisi F, Gezdirici A, Fernandez-Jaen A, Hauser N, Zarate YA, Bosanko KA, Dieterich K, Carey JC, Chong JX, Nickerson DA, Bamshad MJ, Lee BH, Yang XJ, Lupski JR, Campeau PM. Further delineation of the clinical spectrum of KAT6B disorders and allelic series of pathogenic variants. Genet Med 2020; 22:1338-1347. [PMID: 32424177 DOI: 10.1038/s41436-020-0811-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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: 01/30/2020] [Revised: 04/09/2020] [Accepted: 04/09/2020] [Indexed: 11/09/2022] Open
Abstract
PURPOSE Genitopatellar syndrome and Say-Barber-Biesecker-Young-Simpson syndrome are caused by variants in the KAT6B gene and are part of a broad clinical spectrum called KAT6B disorders, whose variable expressivity is increasingly being recognized. METHODS We herein present the phenotypes of 32 previously unreported individuals with a molecularly confirmed diagnosis of a KAT6B disorder, report 24 new pathogenic KAT6B variants, and review phenotypic information available on all published individuals with this condition. We also suggest a classification of clinical subtypes within the KAT6B disorder spectrum. RESULTS We demonstrate that cerebral anomalies, optic nerve hypoplasia, neurobehavioral difficulties, and distal limb anomalies other than long thumbs and great toes, such as polydactyly, are more frequently observed than initially reported. Intestinal malrotation and its serious consequences can be present in affected individuals. Additionally, we identified four children with Pierre Robin sequence, four individuals who had increased nuchal translucency/cystic hygroma prenatally, and two fetuses with severe renal anomalies leading to renal failure. We also report an individual in which a pathogenic variant was inherited from a mildly affected parent. CONCLUSION Our work provides a comprehensive review and expansion of the genotypic and phenotypic spectrum of KAT6B disorders that will assist clinicians in the assessment, counseling, and management of affected individuals.
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Affiliation(s)
- Li Xin Zhang
- Sainte-Justine Hospital Research Center, University of Montreal, Montreal, QC, Canada
| | - Gabrielle Lemire
- Division of Medical Genetics, Department of Pediatrics, CHU Sainte-Justine, University of Montreal, Montreal, QC, Canada
| | | | - Sirinart Molidperee
- Sainte-Justine Hospital Research Center, University of Montreal, Montreal, QC, Canada
| | - Carolina Galaz-Montoya
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - David S Liu
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Alain Verloes
- Department of Genetics and INSERM UMR1141, APHP-Nord Université de Paris, Robert DEBRE Hospital, Paris and ERN-ITHACA, Paris, France
| | - Amelle G Shillington
- Department of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Kosuke Izumi
- Division of Human Genetics, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Alyssa L Ritter
- Division of Human Genetics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Beth Keena
- Division of Human Genetics, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Elaine Zackai
- Division of Human Genetics, Children's Hospital of Philadelphia, Philadelphia, PA, USA.,Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Dong Li
- Center for Applied Genomics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Elizabeth Bhoj
- Division of Human Genetics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Jennifer M Tarpinian
- Roberts Individualized Medical Genetics Center, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Emma Bedoukian
- Roberts Individualized Medical Genetics Center, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | | | - A Micheil Innes
- Department of Medical Genetics and Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada
| | - Grace U Ediae
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, ON, Canada
| | - Sarah L Sawyer
- Department of Genetics, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | | | - Para Chottil Soumya
- Department of Pediatrics, Government Medical College, Kozhikode, Kerala, India
| | | | - Frank J Probst
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Texas Children's Hospital, Houston, TX, USA
| | - Jennifer A Bassetti
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Texas Children's Hospital, Houston, TX, USA
| | - Reid V Sutton
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Texas Children's Hospital, Houston, TX, USA
| | - Richard A Gibbs
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Chester Brown
- University of Tennessee Health Science Center, Le Bonheur Children's Hospital, Memphis, TN, USA
| | - Philip M Boone
- Division of Genetics and Genomics, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Ingrid A Holm
- Division of Genetics and Genomics, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Marco Tartaglia
- Genetics and Rare Diseases Research Division, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
| | | | - Marcello Niceta
- Genetics and Rare Diseases Research Division, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
| | - Maria Lisa Dentici
- Genetics and Rare Diseases Research Division, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
| | | | - Boris Keren
- Genetic department, AP-HP, Sorbonne Université, Paris, France
| | - Constance F Wells
- Service de Génétique Clinique, Département de Génétique Médicale, Maladies Rares et Médecine Personnalisée, CHU de Montpellier, Montpellier, France
| | - Christine Coubes
- Service de Génétique Clinique, Département de Génétique Médicale, Maladies Rares et Médecine Personnalisée, CHU de Montpellier, Montpellier, France
| | - Annie Laquerrière
- Department of Pathology, Centre for Genomic and Personalized Medicine, UNIROUEN Normandie University, Inserm U1245, Normandy, Rouen, France
| | - Jacqueline Aziza
- Département anatomie et cytologie pathologiques, CHU Toulouse, Toulouse, France
| | - Charlotte Dubucs
- Département anatomie et cytologie pathologiques, CHU Toulouse, Toulouse, France
| | - Sheela Nampoothiri
- Department of Pediatric Genetics, Amrita Institute of Medical Sciences and Research Centre, Cochin, Kerala, India
| | - David Mowat
- Centre for Clinical Genetics, Sydney Children's Hospital Randwick, Sydney, Australia
| | - Millan S Patel
- BC Children's Hospital Research Institute and Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Ana Bracho
- Genetic Research Institute, University of Zulia, Maracaibo, Venezuela
| | | | - Alper Gezdirici
- Department of Medical Genetics, Istanbul Health Science University, Kanuni Sultan Suleyman Training and Research Hospital, Istanbul, Turkey
| | - Alberto Fernandez-Jaen
- Department of Pediatric Neurology, Hospital Quirónsalud School of Medicine, Universidad Europea, Madrid, Spain
| | | | - Yuri A Zarate
- Department of Pediatrics, Section of Genetics and Metabolism, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Katherine A Bosanko
- Department of Pediatrics, Section of Genetics and Metabolism, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Klaus Dieterich
- Medical Genetics, CHU Grenoble Alpes, Université Grenoble Alpes, Inserm, U1216, GIN, Grenoble, France
| | - John C Carey
- Division of Medical Genetics, Department of Pediatrics, University of Utah Health, Salt Lake City, UT, USA
| | - Jessica X Chong
- Department of Pediatrics, University of Washington, Seattle, WA, USA.,Brotman-Baty Institute for Precision Medicine, Seattle, WA, USA
| | - Deborah A Nickerson
- Brotman-Baty Institute for Precision Medicine, Seattle, WA, USA.,Department of Genome Sciences, University of Washington, Seattle, WA, USA
| | - Michael J Bamshad
- Department of Pediatrics, University of Washington, Seattle, WA, USA.,Brotman-Baty Institute for Precision Medicine, Seattle, WA, USA
| | - Brendan H Lee
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Xiang-Jiao Yang
- Goodman Cancer Center, Department of Medicine, McGill University, Montreal, QC, Canada
| | - James R Lupski
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Texas Children's Hospital, Houston, TX, USA
| | - Philippe M Campeau
- Division of Medical Genetics, Department of Pediatrics, CHU Sainte-Justine, University of Montreal, Montreal, QC, Canada.
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15
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Abstract
Visceral artery aneurysms (VAA) are an uncommon but well recognized condition. Hepatic artery aneurysms (HAA) represent 14-20% of all visceral artery aneurysms. Post traumatic hepatic artery pseudoaneurysm is an uncommon delayed complication of blunt liver trauma. Here we present a case of a 27 year old male with blunt abdominal trauma who developed a post traumatic pseudoaneurysm of the hepatic artery just proximal to its bifurcation into the left and right branches. The pseudoaneurysm ruptured within 12 hours of injury and he required double ligation of the hepatic artery as well as right and left hepatic arteries. However, the bleeding continued through the retrograde flow from the gastroduodenal artery and hence, ligation of gastrodudenal artery was also done. The decision of complete devasularisation of liver was taken as an emergency lifesaving procedure. The patient recovered and was discharged without sequel.
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Affiliation(s)
- M S Patel
- Department of General Surgery, Seth G.S. Medical College and K.E.M. Hospital, Parel, Mumbai, Maharashtra, India
| | - V Shetty
- Department of General Surgery, Seth G.S. Medical College and K.E.M. Hospital, Parel, Mumbai, Maharashtra, India
| | - A Shelake
- Department of General Surgery, Seth G.S. Medical College and K.E.M. Hospital, Parel, Mumbai, Maharashtra, India
| | - A A Deshpande
- Department of General Surgery, Seth G.S. Medical College and K.E.M. Hospital, Parel, Mumbai, Maharashtra, India
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16
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Siddiqui BM, Patel MS, Rudge S, Best A, Mangwani J. Incidence of clinically suspected venous thromboembolism in British Indian patients. Ann R Coll Surg Engl 2018; 100:413-416. [PMID: 29692193 DOI: 10.1308/rcsann.2018.0058] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Introduction Venous thromboembolism (VTE) remains a major public health issue around the world. Ethnicity is known to alter the incidence of VTE. To our knowledge, there are no reports in the literature investigating the incidence of VTE in British Indians. The aim of this study was to investigate the rates of symptomatic VTE in British Indian patients in the UK. Methods Patients referred to our institution between January 2011 and August 2013 with clinically suspected VTE were eligible for inclusion in the study. Those not of British Indian or Caucasian ethnicity were excluded. A retrospective review of these two cohorts was conducted. Results Overall, 15,529 cases were referred to our institution for suspected VTE. This included 1,498 individuals of British Indian ethnicity. Of these, 182 (12%) had confirmed VTE episodes. A further 13,159 of the patients with suspected VTE were coded as Caucasian, including 2,412 (16%) who had confirmed VTE events. VTE rates were a third lower in British Indians with clinically suspected VTE than in the equivalent Caucasian group. The British Indian cohort presented with VTE at a much earlier age than Caucasians (mean 57.0 vs 68.0 years). Conclusions This study suggests that British Indian patients have a lower incidence of VTE and are more likely to present at an earlier age than Caucasians. There was no significant difference in VTE type (deep vein thrombosis vs pulmonary embolism) among the ethnic groups. Clinicians should be aware of variations within ethnicities but should continue to adhere to existing VTE prevention guidance.
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Affiliation(s)
- B M Siddiqui
- University Hospitals of Leicester NHS Trust , UK
| | - M S Patel
- University Hospitals of Leicester NHS Trust , UK
| | - S Rudge
- University Hospitals of Leicester NHS Trust , UK
| | - A Best
- University Hospitals of Leicester NHS Trust , UK
| | - J Mangwani
- University Hospitals of Leicester NHS Trust , UK
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17
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Jacquinet A, Brown L, Sawkins J, Liu P, Pugash D, Van Allen MI, Patel MS. Expanding the FANCO/RAD51C associated phenotype: Cleft lip and palate and lobar holoprosencephaly, two rare findings in Fanconi anemia. Eur J Med Genet 2017; 61:257-261. [PMID: 29278735 DOI: 10.1016/j.ejmg.2017.12.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Revised: 11/06/2017] [Accepted: 12/20/2017] [Indexed: 10/18/2022]
Abstract
Fanconi anemia is a rare chromosome instability disorder with a highly variable phenotype. In the antenatal and neonatal periods, the diagnosis is usually suggested by the presence of typical congenital abnormalities such as intrauterine growth retardation, microcephaly and radial ray defects. We report a newborn female with a prenatal diagnosis of Fanconi anemia, complementation group O (FANCO). Antenatal ultrasounds identified symmetrical intrauterine growth retardation, complex heart defect as well as brain anomalies, overlapping fingers and cleft lip and palate. Imperforate anus was detected after birth. Compound heterozygous RAD51C variants c. [571+5G > A]; [c.935G > A] were detected by prenatal whole exome sequencing and cellular hypersensitivity to DNA interstrand crosslinking agents (DEB, MMC) was confirmed after birth. With only one previously described homozygous RAD51C variant to date, our findings expand the phenotypic spectrum of FANCO and suggest it should be part of the antenatal differential diagnosis for trisomy 13 and 18, due to the presence of atypical findings such as cleft lip and palate, holoprosencephaly, growth restriction and overlapping fingers.
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Affiliation(s)
- Adeline Jacquinet
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada; Center for Human Genetics, Centre Hospitalier Universitaire and University of Liège, Liège, Belgium.
| | - Lindsay Brown
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, Canada
| | - Jessica Sawkins
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - Pengfei Liu
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA; Baylor Genetics, Houston, TX, USA
| | - Denise Pugash
- Department of Radiology, University of British Columbia, Vancouver, Canada
| | - Margot I Van Allen
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - Millan S Patel
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
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18
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Connell M, Chen H, Jiang J, Kuan CW, Fotovati A, Chu TLH, He Z, Lengyell TC, Li H, Kroll T, Li AM, Goldowitz D, Frappart L, Ploubidou A, Patel MS, Pilarski LM, Simpson EM, Lange PF, Allan DW, Maxwell CA. HMMR acts in the PLK1-dependent spindle positioning pathway and supports neural development. eLife 2017; 6:e28672. [PMID: 28994651 PMCID: PMC5681225 DOI: 10.7554/elife.28672] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 10/05/2017] [Indexed: 01/08/2023] Open
Abstract
Oriented cell division is one mechanism progenitor cells use during development and to maintain tissue homeostasis. Common to most cell types is the asymmetric establishment and regulation of cortical NuMA-dynein complexes that position the mitotic spindle. Here, we discover that HMMR acts at centrosomes in a PLK1-dependent pathway that locates active Ran and modulates the cortical localization of NuMA-dynein complexes to correct mispositioned spindles. This pathway was discovered through the creation and analysis of Hmmr-knockout mice, which suffer neonatal lethality with defective neural development and pleiotropic phenotypes in multiple tissues. HMMR over-expression in immortalized cancer cells induces phenotypes consistent with an increase in active Ran including defects in spindle orientation. These data identify an essential role for HMMR in the PLK1-dependent regulatory pathway that orients progenitor cell division and supports neural development.
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Affiliation(s)
- Marisa Connell
- Department of PaediatricsUniversity of British ColumbiaVancouverCanada
| | - Helen Chen
- Department of PaediatricsUniversity of British ColumbiaVancouverCanada
| | - Jihong Jiang
- Department of PaediatricsUniversity of British ColumbiaVancouverCanada
| | - Chia-Wei Kuan
- Department of Pathology and Laboratory MedicineUniversity of British ColumbiaVancouverCanada
| | - Abbas Fotovati
- Department of PaediatricsUniversity of British ColumbiaVancouverCanada
| | - Tony LH Chu
- Department of PaediatricsUniversity of British ColumbiaVancouverCanada
| | - Zhengcheng He
- Department of PaediatricsUniversity of British ColumbiaVancouverCanada
| | - Tess C Lengyell
- Centre for Molecular Medicine and TherapeuticsUniversity of British ColumbiaVancouverCanada
| | - Huaibiao Li
- Leibniz Institute on Aging—Fritz Lipmann InstituteBeutenbergstrasseGermany
| | - Torsten Kroll
- Leibniz Institute on Aging—Fritz Lipmann InstituteBeutenbergstrasseGermany
| | - Amanda M Li
- Department of PaediatricsUniversity of British ColumbiaVancouverCanada
| | - Daniel Goldowitz
- Centre for Molecular Medicine and TherapeuticsUniversity of British ColumbiaVancouverCanada
- Department of Medical GeneticsUniversity of British ColumbiaVancouverCanada
| | - Lucien Frappart
- Leibniz Institute on Aging—Fritz Lipmann InstituteBeutenbergstrasseGermany
| | - Aspasia Ploubidou
- Leibniz Institute on Aging—Fritz Lipmann InstituteBeutenbergstrasseGermany
| | - Millan S Patel
- Department of Medical GeneticsUniversity of British ColumbiaVancouverCanada
| | - Linda M Pilarski
- Cross Cancer Institute, Department of OncologyUniversity of AlbertaEdmontonCanada
| | - Elizabeth M Simpson
- Centre for Molecular Medicine and TherapeuticsUniversity of British ColumbiaVancouverCanada
- Department of Medical GeneticsUniversity of British ColumbiaVancouverCanada
| | - Philipp F Lange
- Department of Pathology and Laboratory MedicineUniversity of British ColumbiaVancouverCanada
- Michael Cuccione Childhood Cancer Research ProgramBC Children’s HospitalVancouverCanada
| | - Douglas W Allan
- Department of Cellular and Physiological SciencesLife Sciences Centre, University of British ColumbiaVancouverCanada
| | - Christopher A Maxwell
- Department of PaediatricsUniversity of British ColumbiaVancouverCanada
- Michael Cuccione Childhood Cancer Research ProgramBC Children’s HospitalVancouverCanada
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19
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Shah JA, Patel MS, Elias N, Navarro-Alvarez N, Rosales I, Wilkinson RA, Louras NJ, Hertl M, Fishman JA, Colvin RB, Cosimi AB, Markmann JF, Sachs DH, Vagefi PA. Prolonged Survival Following Pig-to-Primate Liver Xenotransplantation Utilizing Exogenous Coagulation Factors and Costimulation Blockade. Am J Transplant 2017; 17:2178-2185. [PMID: 28489305 PMCID: PMC5519420 DOI: 10.1111/ajt.14341] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [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: 03/22/2017] [Revised: 04/14/2017] [Accepted: 04/29/2017] [Indexed: 01/25/2023]
Abstract
Since the first attempt of pig-to-primate liver xenotransplantation (LXT) in 1968, survival has been limited. We evaluated a model utilizing α-1,3-galactosyltransferase knockout donors, continuous posttransplant infusion of human prothrombin concentrate complex, and immunosuppression including anti-thymocyte globulin, FK-506, methylprednisone, and costimulation blockade (belatacept, n = 3 or anti-CD40 mAb, n = 1) to extend survival. Baboon 1 remained well until postoperative day (POD) 25, when euthanasia was required because of cholestasis and plantar ulcers. Baboon 2 was euthanized following a seizure on POD 5, despite normal liver function tests (LFTs) and no apparent pathology. Baboon 3 demonstrated initial stable liver function but was euthanized on POD 8 because of worsening LFTs. Pathology revealed C4d positivity, extensive hemorrhagic necrosis, and a focal cytomegalovirus inclusion. Baboon 4 was clinically well with stable LFTs until POD29, when euthanasia was again necessitated by plantar ulcerations and rising LFTs. Final pathology was C4d negative and without evidence of rejection, inflammation, or thrombotic microangiopathy. Thus, nearly 1-mo rejection-free survival has been achieved following LXT in two of four consecutive recipients, demonstrating that the porcine liver can support life in primates for several weeks and has encouraging potential for clinical application as a bridge to allotransplantation for patients with acute-on-chronic or fulminant hepatic failure.
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Affiliation(s)
- J A Shah
- Center for Transplantation Sciences, Massachusetts General Hospital/Harvard Medical School, Boston, MA
| | - M S Patel
- Center for Transplantation Sciences, Massachusetts General Hospital/Harvard Medical School, Boston, MA
| | - N Elias
- Center for Transplantation Sciences, Massachusetts General Hospital/Harvard Medical School, Boston, MA
| | - N Navarro-Alvarez
- Center for Transplantation Sciences, Massachusetts General Hospital/Harvard Medical School, Boston, MA
| | - I Rosales
- Center for Transplantation Sciences, Massachusetts General Hospital/Harvard Medical School, Boston, MA
| | - R A Wilkinson
- Center for Transplantation Sciences, Massachusetts General Hospital/Harvard Medical School, Boston, MA
| | - N J Louras
- Center for Transplantation Sciences, Massachusetts General Hospital/Harvard Medical School, Boston, MA
| | - M Hertl
- Center for Transplantation Sciences, Massachusetts General Hospital/Harvard Medical School, Boston, MA
| | - J A Fishman
- Center for Transplantation Sciences, Massachusetts General Hospital/Harvard Medical School, Boston, MA
| | - R B Colvin
- Center for Transplantation Sciences, Massachusetts General Hospital/Harvard Medical School, Boston, MA
| | - A B Cosimi
- Center for Transplantation Sciences, Massachusetts General Hospital/Harvard Medical School, Boston, MA
| | - J F Markmann
- Center for Transplantation Sciences, Massachusetts General Hospital/Harvard Medical School, Boston, MA
| | - D H Sachs
- Center for Transplantation Sciences, Massachusetts General Hospital/Harvard Medical School, Boston, MA
| | - P A Vagefi
- Center for Transplantation Sciences, Massachusetts General Hospital/Harvard Medical School, Boston, MA
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20
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Kalyan S, Patel MS, Kingwell E, Côté HCF, Liu D, Prior JC. Competing Factors Link to Bone Health in Polycystic Ovary Syndrome: Chronic Low-Grade Inflammation Takes a Toll. Sci Rep 2017; 7:3432. [PMID: 28611442 PMCID: PMC5469792 DOI: 10.1038/s41598-017-03685-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 05/03/2017] [Indexed: 01/03/2023] Open
Abstract
Chronic inflammation predisposes to poor bone health. Women with polycystic ovary syndrome (PCOS) experience androgen excess, ovulatory disturbances, insulin resistance, abdominal adiposity and chronic inflammation. Our objective was to investigate the relationships among bone health parameters, chronic subclinical inflammation and anthropometric measures in premenopausal women with and without PCOS. In 61 premenopausal women, 22 women with PCOS and 39 controls, we assessed bone parameters (total hip bone mineral density [BMD] by dual-energy X-ray absorptiometry and radius strength-strain index [SSI] by peripheral quantitative computed tomography), inflammation (C-reactive protein/albumin), oxidative stress (leukocyte telomere length, urinary 8-hydroxydeoxyguanosine); hemoglobin A1c; anthropometric measures (body mass index, waist-to-height ratio, cross-sectional muscle area). A diagnosis of PCOS negatively predicted (beta = -0.251, p = 0.022) hip BMD in a regression model including weight. In women with PCOS, inflammation, which was predicted by increased waist-to-height ratio and current use of oral contraceptives, attenuated the positive influences of increased weight and muscle mass on bone strength and was inversely associated with radial SSI (R2 = 0.25, p = 0.018). In conclusion, chronic subclinical inflammation may negatively impact bone physiology in women with PCOS. Strategies focused on reducing abdominal adiposity and avoiding medications that increase inflammation may counter this effect.
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Affiliation(s)
- Shirin Kalyan
- Centre for Menstrual Cycle and Ovulation Research, Division of Endocrinology, Department of Medicine, University of British Columbia; Vancouver Coastal Health Research Institute, Vancouver, Canada.
- Women's Health Research Institute, Vancouver, Canada.
| | - Millan S Patel
- Deptartment of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - Elaine Kingwell
- Centre for Menstrual Cycle and Ovulation Research, Division of Endocrinology, Department of Medicine, University of British Columbia; Vancouver Coastal Health Research Institute, Vancouver, Canada
- Division of Neurology, Department of Medicine, University of British Columbia, Vancouver, Canada
| | - Hélène C F Côté
- Centre for Menstrual Cycle and Ovulation Research, Division of Endocrinology, Department of Medicine, University of British Columbia; Vancouver Coastal Health Research Institute, Vancouver, Canada
- Women's Health Research Institute, Vancouver, Canada
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, Canada
| | - Danmei Liu
- Centre for Hip Health and Mobility, University of British Columbia, Vancouver, Canada
| | - Jerilynn C Prior
- Centre for Menstrual Cycle and Ovulation Research, Division of Endocrinology, Department of Medicine, University of British Columbia; Vancouver Coastal Health Research Institute, Vancouver, Canada
- Women's Health Research Institute, Vancouver, Canada
- School of Population and Public Health, University of British Columbia, Vancouver, Canada
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Niederhoffer KY, Fahiminiya S, Eydoux P, Mawson J, Nishimura G, Jerome-Majewska LA, Patel MS. Diagnosis of Van den Ende-Gupta syndrome: Approach to the Marden-Walker-like spectrum of disorders. Am J Med Genet A 2016; 170:2310-21. [DOI: 10.1002/ajmg.a.37831] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Accepted: 06/16/2016] [Indexed: 01/12/2023]
Affiliation(s)
- Karen Y. Niederhoffer
- Department of Medical Genetics; University of British Columbia; Vancouver British Columbia Canada
| | - Somayyeh Fahiminiya
- Department of Human Genetics; Pediatrics, McGill University; Montreal Quebec Canada
| | - Patrice Eydoux
- Department of Pathology Laboratory Medicine; University of British Columbia; Vancouver British Columbia Canada
| | - John Mawson
- Department of Radiology; University of British Columbia; Vancouver British Columbia Canada
| | - Gen Nishimura
- Department of Orthopaedic Surgery; Nagoya University Graduate School of Medicine; Nagoya Japan
| | - Loydie A. Jerome-Majewska
- Department of Human Genetics; Pediatrics, McGill University; Montreal Quebec Canada
- Pediatrics, McGill University; Montreal Quebec Canada
| | - Millan S. Patel
- Department of Medical Genetics; University of British Columbia; Vancouver British Columbia Canada
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22
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Stirling ERB, Patel MS, Williams SC. Syringe barrels as radiolucent drill sleeves during fixation of intramedullary nails for long-bone fractures. Ann R Coll Surg Engl 2016; 98:345-6. [PMID: 27087335 DOI: 10.1308/rcsann.2016.0121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- E R B Stirling
- University Hospitals of Leicester NHS Trust , Leicester , UK
| | - M S Patel
- University Hospitals of Leicester NHS Trust , Leicester , UK
| | - S C Williams
- University Hospitals of Leicester NHS Trust , Leicester , UK
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23
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Patel MS, Donaldson AV, Lewis A, Natanek SA, Lee JY, Andersson YM, Haji G, Jackson SG, Bolognese BJ, Foley JP, Podolin PL, Bruijnzeel PLB, Hart N, Hopkinson NS, Man WDC, Kemp PR, Polkey MI. Klotho and smoking--An interplay influencing the skeletal muscle function deficits that occur in COPD. Respir Med 2016; 113:50-6. [PMID: 27021580 DOI: 10.1016/j.rmed.2016.02.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 02/05/2016] [Accepted: 02/11/2016] [Indexed: 02/08/2023]
Abstract
BACKGROUND Klotho is an 'anti-ageing' hormone and transmembrane protein; Klotho deficient mice develop a similar ageing phenotype to smokers including emphysema and muscle wasting. The objective of this study was to evaluate skeletal muscle and circulating Klotho protein in smokers and COPD patients and to relate Klotho levels to relevant skeletal muscle parameters. We sought to validate our findings by undertaking complimentary murine studies. METHODS Fat free mass, quadriceps strength and spirometry were measured in 87 participants (61 COPD, 13 'healthy smokers' and 13 never smoking controls) in whom serum and quadriceps Klotho protein levels were also measured. Immunohistochemistry was performed to demonstrate the location of Klotho protein in human skeletal muscle and in mouse skeletal muscle in which regeneration was occurring following injury induced by electroporation. In a separate study, gastrocnemius Klotho protein was measured in mice exposed to 77 weeks of smoke or sham air. RESULTS Quadriceps Klotho levels were lower in those currently smoking (p = 0.01), irrespective of spirometry, but were not lower in patients with COPD. A regression analysis identified current smoking status as the only independent variable associated with human quadriceps Klotho levels, an observation supported by the finding that smoke exposed mice had lower gastrocnemius Klotho levels than sham exposed mice (p = 0.005). Quadriceps Klotho levels related to local oxidative stress but were paradoxically higher in patients with established muscle wasting or weakness; the unexpected relationship with low fat free mass was the only independent association. Within locomotor muscle, Klotho localized to the plasma membrane and to centralized nuclei in humans and in mice with induced muscle damage. Serum Klotho had an independent association with quadriceps strength but did not relate to quadriceps Klotho levels or to spirometric parameters. CONCLUSIONS Klotho is expressed in skeletal muscle and levels are reduced by smoking. Despite this, quadriceps Klotho protein expression in those with established disease appears complex as levels were paradoxically elevated in COPD patients with established muscle wasting. Whilst serum Klotho levels were not reduced in smokers or COPD patients and were not associated with quadriceps Klotho protein, they did relate to quadriceps strength.
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Affiliation(s)
- M S Patel
- NIHR Respiratory Biomedical Research Unit, Royal Brompton & Harefield NHS Foundation Trust and Imperial College, UK; Imperial College London, UK
| | - A V Donaldson
- NIHR Respiratory Biomedical Research Unit, Royal Brompton & Harefield NHS Foundation Trust and Imperial College, UK; Imperial College London, UK
| | | | - S A Natanek
- NIHR Respiratory Biomedical Research Unit, Royal Brompton & Harefield NHS Foundation Trust and Imperial College, UK; Imperial College London, UK
| | | | | | - G Haji
- NIHR Respiratory Biomedical Research Unit, Royal Brompton & Harefield NHS Foundation Trust and Imperial College, UK; Imperial College London, UK
| | | | - B J Bolognese
- Respiratory Therapeutic Area, GlaxoSmithKline, King of Prussia, PA, USA
| | - J P Foley
- Respiratory Therapeutic Area, GlaxoSmithKline, King of Prussia, PA, USA
| | - P L Podolin
- Respiratory Therapeutic Area, GlaxoSmithKline, King of Prussia, PA, USA
| | | | - N Hart
- NIHR Comprehensive Biomedical Research Centre, Guy's & St Thomas' NHS Foundation Trust and King's College London, London, UK
| | - N S Hopkinson
- NIHR Respiratory Biomedical Research Unit, Royal Brompton & Harefield NHS Foundation Trust and Imperial College, UK; Imperial College London, UK
| | - W D-C Man
- NIHR Respiratory Biomedical Research Unit, Royal Brompton & Harefield NHS Foundation Trust and Imperial College, UK; Imperial College London, UK
| | | | - M I Polkey
- NIHR Respiratory Biomedical Research Unit, Royal Brompton & Harefield NHS Foundation Trust and Imperial College, UK; Imperial College London, UK.
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Gripp KW, Robbins KM, Sheffield BS, Lee AF, Patel MS, Yip S, Doyle D, Stabley D, Sol-Church K. Paternal uniparental disomy 11p15.5 in the pancreatic nodule of an infant with Costello syndrome: Shared mechanism for hyperinsulinemic hypoglycemia in neonates with Costello and Beckwith-Wiedemann syndrome and somatic loss of heterozygosity in Costello syndrome driving clonal expansion. Am J Med Genet A 2015; 170:559-64. [PMID: 26572961 DOI: 10.1002/ajmg.a.37471] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 11/01/2015] [Indexed: 11/09/2022]
Abstract
Costello syndrome (CS) entails a cancer predisposition and is caused by activating HRAS mutations, typically arising de novo in the paternal germline. Hypoglycemia is common in CS neonates. A previously reported individual with the rare HRAS p.Gln22Lys had hyperinsulinemic hypoglycemia. Autopsy showed a discrete pancreatic nodule. The morphologic and immunohistochemistry findings, including loss of p57(Kip2) protein, were identical to a focal lesion of congenital hyperinsulinism, however, no KCNJ11 or ABCC8 mutation was identified and germline derived DNA showed no alternation of the maternal or paternal 11p15 alleles. Here we report paternal uniparental disomy (pUPD) within the lesion, similar to the pUPD11p15.5 in Beckwith-Wiedemann syndrome (BWS). The similar extent of the pUPD suggests a similar mechanism driving hyperinsulinemia in both conditions. After coincidental somatic LOH and pUPD, the growth promoting effects of the paternally derived HRAS mutation, in combination with the increased function of the adjacent paternally expressed IGF2, may together result in clonal expansion. Although this somatic LOH within pancreatic tissue resulted in hyperinsulinism, similar LOH in mesenchymal cells may drive embryonal rhabdomyosarcoma (ERMS). Interestingly, biallelic IGF2 expression has been linked to rhabdomyosarcoma tumorigenesis and pUPD11 occurred in all 8 ERMS samples from CS individuals. Somatic KRAS and HRAS mutations occur with comparable frequency in isolated malignancies. Yet, the malignancy risk in CS is notably higher than in Noonan syndrome with a KRAS mutation. It is conceivable that HRAS co-localization with IGF2 and the combined effect of pUPD 11p15.5 on both genes contributes to the oncogenic potential.
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Affiliation(s)
- Karen W Gripp
- Division of Medical Genetics, A. I. du Pont Hospital for Children/Nemours, Wilmington, Delaware
| | - Katherine M Robbins
- Biomedical Research, A. I. du Pont Hospital for Children/Nemours, Wilmington, Delaware
| | | | - Anna F Lee
- Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Millan S Patel
- Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Stephen Yip
- Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Daniel Doyle
- Division of Endocrinology, A. I. du Pont Hospital for Children/Nemours, Wilmington, Delaware
| | - Deborah Stabley
- Biomedical Research, A. I. du Pont Hospital for Children/Nemours, Wilmington, Delaware
| | - Katia Sol-Church
- Biomedical Research, A. I. du Pont Hospital for Children/Nemours, Wilmington, Delaware
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25
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Patel MS, Niemann CU, Sally MB, De La Cruz S, Zatarain J, Ewing T, Crutchfield M, Enestvedt CK, Malinoski DJ. The Impact of Hydroxyethyl Starch Use in Deceased Organ Donors on the Development of Delayed Graft Function in Kidney Transplant Recipients: A Propensity-Adjusted Analysis. Am J Transplant 2015; 15:2152-8. [PMID: 25904248 DOI: 10.1111/ajt.13263] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 01/20/2015] [Accepted: 01/31/2015] [Indexed: 01/25/2023]
Abstract
Our objective was to evaluate the impact of hydroxyethyl starch (HES) use in organ donors after neurologic determination of death (DNDD) on recipient renal graft outcomes. The following data elements were prospectively collected for every DNDD managed by a single organ procurement organization from June 2011 to July 2013: demographics; critical care endpoints; treatments, including the use of HES; graft cold ischemia time (CIT); and the occurrence of recipient delayed graft function (DGF, dialysis in the first week after transplantation). Logistic regression was performed to identify independent predictors of DGF with a p-value <0.05. The results were then adjusted for each donor's calculated propensity to receive HES. Nine hundred eighty-six kidneys were transplanted from 529 donors. Forty-two percent received HES (1217 ± 528 mL) and 35% developed DGF. Kidneys from DNDDs who received HES had a higher crude rate of DGF (41% vs. 31%, p < 0.001). After accounting for the propensity to receive HES, independent predictors of DGF were age (OR 1.02 [1.01-1.04] per year), CIT (OR 1.04[1.02-1.06] per hour), creatinine (OR 1.5 [1.32-1.72] per mg/dL) and HES use (OR 1.41 [1.02-1.95]). HES use during donor management was independently associated with a 41% increase in the risk of DGF in kidney transplant recipients.
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Affiliation(s)
- M S Patel
- Department of Surgery, Massachusetts General Hospital, Boston, MA
| | - C U Niemann
- Department of Anesthesia and Perioperative Care, University of California San Francisco, San Francisco, CA.,Department of Surgery, University of California San Francisco, San Francisco, CA
| | - M B Sally
- Surgical Critical Care Section, Portland Veterans Affairs Medical Center, Portland, OR.,Department of Surgery, Oregon Health and Science University, Portland, OR
| | - S De La Cruz
- Surgical Critical Care Section, Portland Veterans Affairs Medical Center, Portland, OR.,Department of Surgery, Oregon Health and Science University, Portland, OR
| | - J Zatarain
- Department of Surgery, University of Texas Medical Branch, Galveston, TX
| | - T Ewing
- School of Medicine, University of California, Davis, Sacramento, CA
| | - M Crutchfield
- Surgical Critical Care Section, Portland Veterans Affairs Medical Center, Portland, OR
| | - C K Enestvedt
- Department of Surgery, Oregon Health and Science University, Portland, OR
| | - D J Malinoski
- Surgical Critical Care Section, Portland Veterans Affairs Medical Center, Portland, OR.,Department of Surgery, Oregon Health and Science University, Portland, OR
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26
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Sheffield BS, Yip S, Ruchelli ED, Dunham CP, Sherwin E, Brooks PA, Sur A, Singh A, Human DG, Patel MS, Lee AF. Fatal congenital hypertrophic cardiomyopathy and a pancreatic nodule morphologically identical to focal lesion of congenital hyperinsulinism in an infant with costello syndrome: case report and review of the literature. Pediatr Dev Pathol 2015; 18:237-44. [PMID: 25668678 DOI: 10.2350/14-07-1525-cr.1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Costello syndrome is characterized by constitutional mutations in the proto-oncogene HRAS, causing dysmorphic features, multiple cardiac problems, intellectual disability, and an increased risk of neoplasia. We report a male infant with dysmorphic features, born prematurely at 32 weeks, who, during his 3-month life span, had an unusually severe and ultimately fatal manifestation of hypertrophic cardiomyopathy and hyperinsulinemic hypoglycemia. Molecular studies in this patient demonstrated the uncommon Q22K mutation in the HRAS gene, diagnostic of Costello syndrome. The major autopsy findings revealed hypertrophic cardiomyopathy, congenital myopathy, and a 1.4-cm pancreatic nodule that was positive for insulin expression and morphologically identical to a focal lesion of congenital hyperinsulinism. Sequencing of KCNJ11 and ABCC8, the 2 most commonly mutated genes in focal lesion of congenital hyperinsulinism, revealed no mutations. While hyperinsulinism is a recognized feature of RASopathies, a focal proliferation of endocrine cells similar to a focal lesion of hyperinsulinism is a novel pathologic finding in Costello syndrome.
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Affiliation(s)
- Brandon S. Sheffield
- Faculty of Medicine, University of British Columbia, 4480 Oak Street, Room 2H47, Vancouver, BC, Canada
- Division of Anatomical Pathology, Children's and Women's Health Centre of British Columbia, and Department of Pathology and Laboratory Medicine, University of British Columbia, 4480 Oak Street, Room 2H47, Vancouver, BC V6H3V4, Canada
| | - Stephen Yip
- Faculty of Medicine, University of British Columbia, 4480 Oak Street, Room 2H47, Vancouver, BC, Canada
- Centre for Translational and Applied Genomics, British Columbia Cancer Agency, 600 West 10th Avenue, Vancouver, BC V6H3V4, Canada
| | - Eduardo D. Ruchelli
- Division of Anatomical Pathology, The Children's Hospital of Philadelphia. 34th Street and Civic Center Boulevard, Philadelphia, PA 19104, USA
| | - Christopher P. Dunham
- Faculty of Medicine, University of British Columbia, 4480 Oak Street, Room 2H47, Vancouver, BC, Canada
- Division of Anatomical Pathology, Children's and Women's Health Centre of British Columbia, and Department of Pathology and Laboratory Medicine, University of British Columbia, 4480 Oak Street, Room 2H47, Vancouver, BC V6H3V4, Canada
| | - Elizabeth Sherwin
- Faculty of Medicine, University of British Columbia, 4480 Oak Street, Room 2H47, Vancouver, BC, Canada
- Division of Pediatric Cardiology, Children's and Women's Health Centre of British Columbia, 4480 Oak Street, Room 1C50, Vancouver, BC V6H3V4, Canada
| | - Paul A. Brooks
- Faculty of Medicine, University of British Columbia, 4480 Oak Street, Room 2H47, Vancouver, BC, Canada
- Division of Pediatric Cardiology, Children's and Women's Health Centre of British Columbia, 4480 Oak Street, Room 1C50, Vancouver, BC V6H3V4, Canada
| | - Amitava Sur
- Faculty of Medicine, University of British Columbia, 4480 Oak Street, Room 2H47, Vancouver, BC, Canada
- Department of Neonatal Perinatal Medicine, Children's and Women's Health Centre of British Columbia, 4480 Oak Street, Vancouver, BC V6H3V4, Canada
| | - Avash Singh
- Faculty of Medicine, University of British Columbia, 4480 Oak Street, Room 2H47, Vancouver, BC, Canada
- Department of Neonatal Perinatal Medicine, Children's and Women's Health Centre of British Columbia, 4480 Oak Street, Vancouver, BC V6H3V4, Canada
| | - Derek G. Human
- Faculty of Medicine, University of British Columbia, 4480 Oak Street, Room 2H47, Vancouver, BC, Canada
- Division of Pediatric Cardiology, Children's and Women's Health Centre of British Columbia, 4480 Oak Street, Room 1C50, Vancouver, BC V6H3V4, Canada
| | - Millan S. Patel
- Faculty of Medicine, University of British Columbia, 4480 Oak Street, Room 2H47, Vancouver, BC, Canada
- Department of Medical Genetics and Child and Family Research Institute, Children's and Women's Health Centre of British Columbia, 4480 Oak Street, Room C234, Vancouver, BC V6H3V4, Canada
| | - Anna F. Lee
- Faculty of Medicine, University of British Columbia, 4480 Oak Street, Room 2H47, Vancouver, BC, Canada
- Division of Anatomical Pathology, Children's and Women's Health Centre of British Columbia, and Department of Pathology and Laboratory Medicine, University of British Columbia, 4480 Oak Street, Room 2H47, Vancouver, BC V6H3V4, Canada
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27
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Patel MS, Qureshi AA, Green TP. Dashboard (in the) knee. Ann R Coll Surg Engl 2015; 97:e21-2. [PMID: 25723676 DOI: 10.1308/003588414x14055925060433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We present the case of a 19-year-old individual presenting to an orthopaedic outpatient clinic several months following a dashboard knee injury during a road traffic accident with intermittent mechanical symptoms. Despite unremarkable examination findings and normal magnetic resonance imaging, the patient was identified subsequently as having an intra-articular plastic foreign body consistent with a piece of dashboard on arthroscopic knee assessment, the retrieval of which resulted in a complete resolution of symptoms.
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Patel MS, Young A, Sell P. A simple technique to improve the administration of nerve root blocks. Ann R Coll Surg Engl 2014; 97:82. [PMID: 25519286 DOI: 10.1308/rcsann.2015.97.1.82a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- M S Patel
- University Hospitals of Leicester NHS Trust, UK
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29
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Martin BM, Ivanova MH, Sarukhanov A, Kim A, Power P, Pugash D, Popescu OE, Lachman RS, Krakow D, Patel MS. Prenatal and postnatal findings in serpentine fibula polycystic kidney syndrome and a review of the NOTCH2 spectrum disorders. Am J Med Genet A 2014; 164A:2490-5. [DOI: 10.1002/ajmg.a.36656] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Accepted: 05/28/2014] [Indexed: 11/06/2022]
Affiliation(s)
| | - Margarita H. Ivanova
- Department of Orthopaedic Surgery; David Geffen School of Medicine at UCLA; Los Angeles California
| | - Anna Sarukhanov
- Department of Orthopaedic Surgery; David Geffen School of Medicine at UCLA; Los Angeles California
| | - Ashley Kim
- Department of Orthopaedic Surgery; David Geffen School of Medicine at UCLA; Los Angeles California
| | - Patricia Power
- Department of Medical Genetics; University of British Columbia; Vancouver British Columbia Canada
| | - Denise Pugash
- Department of Radiology; University of British Columbia; Vancouver British Columbia Canada
| | - Oana-Eugenia Popescu
- Department of Pathology and Laboratory Medicine; University of British Columbia; Vancouver British Columbia Canada
| | - Ralph S. Lachman
- Department of Pediatrics; David Geffen School of Medicine at UCLA; Los Angeles California
- Department of Radiology; David Geffen School of Medicine at UCLA; Los Angeles California
| | - Deborah Krakow
- Department of Orthopaedic Surgery; David Geffen School of Medicine at UCLA; Los Angeles California
- Department of Human Genetics; David Geffen School of Medicine at UCLA; Los Angeles California
- Department of Obstetrics and Gynecology; David Geffen School of Medicine at UCLA; Los Angeles California
| | - Millan S. Patel
- Department of Medical Genetics; University of British Columbia; Vancouver British Columbia Canada
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Lehman AM, Cowan JR, McFadden DE, Patel MS. Anterolateral diaphragmatic hernia with body wall defect understood in relation to the abaxial domain. Am J Med Genet A 2014; 164A:1860-2. [PMID: 24700809 DOI: 10.1002/ajmg.a.36529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Accepted: 02/14/2014] [Indexed: 11/05/2022]
Affiliation(s)
- Anna M Lehman
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
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31
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McKinnon ML, Rozmus J, Fung SY, Hirschfeld AF, Del Bel KL, Thomas L, Marr N, Martin SD, Marwaha AK, Priatel JJ, Tan R, Senger C, Tsang A, Prendiville J, Junker AK, Seear M, Schultz KR, Sly LM, Holt RA, Patel MS, Friedman JM, Turvey SE. Combined immunodeficiency associated with homozygous MALT1 mutations. J Allergy Clin Immunol 2014; 133:1458-62, 1462.e1-7. [DOI: 10.1016/j.jaci.2013.10.045] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Revised: 09/20/2013] [Accepted: 10/22/2013] [Indexed: 10/25/2022]
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32
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Ye XC, Pegado V, Patel MS, Wasserman WW. Strabismus genetics across a spectrum of eye misalignment disorders. Clin Genet 2014; 86:103-11. [PMID: 24579652 PMCID: PMC4233980 DOI: 10.1111/cge.12367] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 02/20/2014] [Accepted: 02/24/2014] [Indexed: 01/24/2023]
Abstract
Eye misalignment, called strabismus, is amongst the most common phenotypes observed, occurring in up to 5% of individuals in a studied population. While misalignment is frequently observed in rare complex syndromes, the majority of strabismus cases are non-syndromic. Over the past decade, genes and pathways associated with syndromic forms of strabismus have emerged, but the genes contributing to non-syndromic strabismus remain elusive. Genetic testing for strabismus risk may allow for earlier diagnosis and treatment, as well as decreased frequency of surgery. We review human and model organism literature describing non-syndromic strabismus, including family, twin, linkage, and gene expression studies. Recent advances in the genetics of Duane retraction syndrome are considered, as relatives of those impacted show elevated familial rates of non-syndromic strabismus. As whole genome sequencing efforts are advancing for the discovery of the elusive strabismus genes, this overview is intended to support the interpretation of the new findings.
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Affiliation(s)
- X C Ye
- Centre for Molecular Medicine and Therapeutics, Child and Family Research Institute, Department of Medical Genetics, Vancouver, BC, Canada
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33
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Brown LA, Rupps R, Peñaherrera MS, Robinson WP, Patel MS, Eydoux P, Boerkoel CF. A cryptic familial rearrangement of 11p15.5, involving both imprinting centers, in a family with a history of short stature. Am J Med Genet A 2014; 164A:1587-94. [DOI: 10.1002/ajmg.a.36490] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 01/14/2014] [Indexed: 01/08/2023]
Affiliation(s)
- Lindsay A. Brown
- Department of Pathology and Laboratory Medicine; University of British Columbia; Vancouver Canada
| | - Rosemarie Rupps
- Department of Medical Genetics; University of British Columbia; Vancouver Canada
| | - Maria S. Peñaherrera
- Department of Medical Genetics; University of British Columbia; Vancouver Canada
- Child & Family Research Institute; Vancouver Canada
| | - Wendy P. Robinson
- Department of Medical Genetics; University of British Columbia; Vancouver Canada
- Child & Family Research Institute; Vancouver Canada
| | - Millan S. Patel
- Department of Medical Genetics; University of British Columbia; Vancouver Canada
| | - Patrice Eydoux
- Department of Pathology and Laboratory Medicine; University of British Columbia; Vancouver Canada
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Oei L, Hsu YH, Styrkarsdottir U, Eussen BH, de Klein A, Peters MJ, Halldorsson B, Liu CT, Alonso N, Kaptoge SK, Thorleifsson G, Hallmans G, Hocking LJ, Husted LB, Jameson KA, Kruk M, Lewis JR, Patel MS, Scollen S, Svensson O, Trompet S, van Schoor NM, Zhu K, Buckley BM, Cooper C, Ford I, Goltzman D, González-Macías J, Langdahl BL, Leslie WD, Lips P, Lorenc RS, Olmos JM, Pettersson-Kymmer U, Reid DM, Riancho JA, Slagboom PE, Garcia-Ibarbia C, Ingvarsson T, Johannsdottir H, Luben R, Medina-Gómez C, Arp P, Nandakumar K, Palsson ST, Sigurdsson G, van Meurs JBJ, Zhou Y, Hofman A, Jukema JW, Pols HAP, Prince RL, Cupples LA, Marshall CR, Pinto D, Sato D, Scherer SW, Reeve J, Thorsteinsdottir U, Karasik D, Richards JB, Stefansson K, Uitterlinden AG, Ralston SH, Ioannidis JPA, Kiel DP, Rivadeneira F, Estrada K. A genome-wide copy number association study of osteoporotic fractures points to the 6p25.1 locus. J Med Genet 2014; 51:122-31. [PMID: 24343915 DOI: 10.1136/jmedgenet-2013-102064] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [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] [Indexed: 12/15/2022]
Abstract
BACKGROUND Osteoporosis is a systemic skeletal disease characterised by reduced bone mineral density and increased susceptibility to fracture; these traits are highly heritable. Both common and rare copy number variants (CNVs) potentially affect the function of genes and may influence disease risk. AIM To identify CNVs associated with osteoporotic bone fracture risk. METHOD We performed a genome-wide CNV association study in 5178 individuals from a prospective cohort in the Netherlands, including 809 osteoporotic fracture cases, and performed in silico lookups and de novo genotyping to replicate in several independent studies. RESULTS A rare (population prevalence 0.14%, 95% CI 0.03% to 0.24%) 210 kb deletion located on chromosome 6p25.1 was associated with the risk of fracture (OR 32.58, 95% CI 3.95 to 1488.89; p = 8.69 × 10(-5)). We performed an in silico meta-analysis in four studies with CNV microarray data and the association with fracture risk was replicated (OR 3.11, 95% CI 1.01 to 8.22; p = 0.02). The prevalence of this deletion showed geographic diversity, being absent in additional samples from Australia, Canada, Poland, Iceland, Denmark, and Sweden, but present in the Netherlands (0.34%), Spain (0.33%), USA (0.23%), England (0.15%), Scotland (0.10%), and Ireland (0.06%), with insufficient evidence for association with fracture risk. CONCLUSIONS These results suggest that deletions in the 6p25.1 locus may predispose to higher risk of fracture in a subset of populations of European origin; larger and geographically restricted studies will be needed to confirm this regional association. This is a first step towards the evaluation of the role of rare CNVs in osteoporosis.
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Affiliation(s)
- Ling Oei
- Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
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Patel MS, Donaldson AV, Natanek SA, Bruijnzeel PLB, Hopkinson NS, Man WDC, Kemp PR, Polkey MI. S51 Klotho is associated with skeletal muscle dysfunction and oxidative stress in COPD. Thorax 2013. [DOI: 10.1136/thoraxjnl-2013-204457.58] [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: 11/03/2022]
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Patel MS, Grannum S, Tariq A, Qureshi A, Watts A, Gabbar O. Are soft tissue measurements on lateral cervical spine X-rays reliable in the assessment of traumatic injuries? Eur J Trauma Emerg Surg 2013; 39:613-8. [PMID: 26815545 DOI: 10.1007/s00068-013-0302-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2012] [Accepted: 05/19/2013] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Traumatic neck pain is a common presentation to the emergency department. Lateral plain radiographs remain the primary investigation in the assessment of these injuries. Soft tissue assessment forms an integral component of these radiographs. They can provide information on subtle injuries that may not be obvious. Many methods are used to assess the prevertebral soft tissue shadows. The two more commonly used techniques include the 'seven at two and two at seven' rule (method 1) and the ratio of the soft tissues with respect to the vertebral width (method 2). AIM To assess which of the above two methods in assessing cervical spine soft tissue shadows on lateral radiographs is more sensitive in the presence of cervical spine injuries. METHODS A retrospective analysis of consecutive traumatic cervical spine films performed within a busy trauma tertiary centre over a period of 7 months. Patients were divided into two groups: group 1-fractures; group 2-no fractures. The prevertebral soft tissue shadows were measured at referenced points on the lateral cervical spine films with respect to the above two methods and comparisons between the groups were made. RESULTS Thirty-nine patients in group 1 were compared to a control group of 60 patients in group 2. Both methods failed to identify any significant differences between the two groups. The sensitivity and specificity for method 1 was 7.6 and 93 %, and for method 2, they were 7.6 and 98 %, respectively. CONCLUSION There is no significant difference between the soft tissue shadows when comparing patients with and without cervical spine fractures on lateral radiographs. Both commonly used measures of soft tissue shadows in clinical practice are insensitive in identifying patients with significant osseous injuries. They, therefore, do not offer any further value in interpreting traumatic cervical spine radiographs. The management of patients with cervical spine trauma in the absence of obvious osseous injury on standard radiographs should warrant a computed tomography (CT) scan if clinically indicated.
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Affiliation(s)
- M S Patel
- Trauma and Orthopaedic Department, Leicester General Hospital, University Hospitals of Leicester NHS Trust, Gwendolen Road, Leicester, LE5 4PW, UK.
| | - S Grannum
- Trauma and Orthopaedic Department, Leicester General Hospital, University Hospitals of Leicester NHS Trust, Gwendolen Road, Leicester, LE5 4PW, UK
| | - A Tariq
- Trauma and Orthopaedic Department, Leicester General Hospital, University Hospitals of Leicester NHS Trust, Gwendolen Road, Leicester, LE5 4PW, UK
| | - A Qureshi
- Trauma and Orthopaedic Department, Leicester General Hospital, University Hospitals of Leicester NHS Trust, Gwendolen Road, Leicester, LE5 4PW, UK
| | - A Watts
- Trauma and Orthopaedic Department, Leicester General Hospital, University Hospitals of Leicester NHS Trust, Gwendolen Road, Leicester, LE5 4PW, UK
| | - O Gabbar
- Trauma and Orthopaedic Department, Leicester General Hospital, University Hospitals of Leicester NHS Trust, Gwendolen Road, Leicester, LE5 4PW, UK
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Mohan D, Lewis A, Patel MS, Curtis K, Tanner R, Kemp P, Polkey MI. S53 Studying fibre specific gene expression in COPD using laser capture micro-dissection in human skeletal muscle. Thorax 2013. [DOI: 10.1136/thoraxjnl-2013-204457.60] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Lehman AM, Dong CC, Harries AM, Patel A, Honey CR, Patel MS. Evidence of ancillary trigeminal innervation of levator palpebrae in the general population. J Clin Neurosci 2013; 21:301-4. [PMID: 24120706 DOI: 10.1016/j.jocn.2013.03.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 02/26/2013] [Accepted: 03/10/2013] [Indexed: 10/26/2022]
Abstract
The cranial synkineses are a group of disorders encompassing a variety of involuntary co-contractions of the facial, masticatory, or extraocular muscles that occur during a particular volitional movement. The neuroanatomical pathways for synkineses largely remain undefined. Our studies explored a normal synkinesis long observed in the general population - that of jaw opening during efforts to open the eyelids widely. To document this phenomenon, we observed 186 consecutive participants inserting or removing contact lenses to identify jaw opening. Seeking electrophysiological evidence, in a second study we enrolled individuals undergoing vascular decompression for trigeminal neuralgia or hemifacial spasm, without a history of jaw-winking, ptosis, or strabismus, to record any motor responses in levator palpebrae superioris (LPS) upon stimulation of the trigeminal motor root. Stimulus was applied to the trigeminal motor root while an electrode in levator recorded the response. We found that 37 participants (20%) opened their mouth partially or fully during contact lens manipulation. In the second study, contraction of LPS with trigeminal motor stimulation was documented in two of six patients, both undergoing surgery for trigeminal neuralgia. We speculate these results might provide evidence of an endogenous synkinesis, indicating that trigeminal-derived innervation of levator could exist in a significant minority of the general population. Our observations demonstrate plasticity in the human cranial nerve innervation pattern and may have implications for treating Marcus Gunn jaw-winking.
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Affiliation(s)
- A M Lehman
- Department of Medical Genetics and Child and Family Research Institute, University of British Columbia, C234 4500 Oak Street, Vancouver, BC, Canada V6H 3N1
| | - C C Dong
- Division of Neurosurgery, Department of Surgery, University of British Columbia, Vancouver, BC, Canada
| | - A M Harries
- Division of Neurosurgery, Department of Surgery, University of British Columbia, Vancouver, BC, Canada
| | - A Patel
- Alberta Eye Health Clinic, Edmonton, AB, Canada
| | - C R Honey
- Division of Neurosurgery, Department of Surgery, University of British Columbia, Vancouver, BC, Canada
| | - M S Patel
- Department of Medical Genetics and Child and Family Research Institute, University of British Columbia, C234 4500 Oak Street, Vancouver, BC, Canada V6H 3N1.
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Langsetmo L, Berger C, Kreiger N, Kovacs CS, Hanley DA, Jamal SA, Whiting SJ, Genest J, Morin SN, Hodsman A, Prior JC, Lentle B, Patel MS, Brown JP, Anastasiades T, Towheed T, Josse RG, Papaioannou A, Adachi JD, Leslie WD, Davison KS, Goltzman D. Calcium and vitamin D intake and mortality: results from the Canadian Multicentre Osteoporosis Study (CaMos). J Clin Endocrinol Metab 2013; 98:3010-8. [PMID: 23703722 PMCID: PMC5096927 DOI: 10.1210/jc.2013-1516] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
CONTEXT Calcium and vitamin D are recommended for bone health, but there are concerns about adverse risks. Some clinical studies suggest that calcium intake may be cardioprotective, whereas others report increased risk associated with calcium supplements. Both low and high serum levels of 25-hydroxyvitamin D have been associated with increased mortality. OBJECTIVE The purpose of this study was to determine the association between total calcium and vitamin D intake and mortality and heterogeneity by source of intake. DESIGN The Canadian Multicentre Osteoporosis Study cohort is a population-based longitudinal cohort with a 10-year follow-up (1995-2007). SETTING This study included randomly selected community-dwelling men and women. PARTICIPANTS A total of 9033 participants with nonmissing calcium and vitamin D intake data and follow-up were studied. EXPOSURE Total calcium intake (dairy, nondairy food, and supplements) and total vitamin D intake (milk, yogurt, and supplements) were recorded. OUTCOME The outcome variable was all-cause mortality. RESULTS There were 1160 deaths during the 10-year period. For women only, we found a possible benefit of higher total calcium intake, with a hazard ratio of 0.95 (95% confidence interval, 0.89-1.01) per 500-mg increase in daily calcium intake and no evidence of heterogeneity by source; use of calcium supplements was also associated with reduced mortality, with hazard ratio of 0.78 (95% confidence interval, 0.66-0.92) for users vs nonusers with statistically significant reductions remaining among those with doses up to 1000 mg/d. These associations were not modified by levels of concurrent vitamin D intake. No definitive associations were found among men. CONCLUSIONS Calcium supplements, up to 1000 mg/d, and increased dietary intake of calcium may be associated with reduced risk of mortality in women. We found no evidence of mortality benefit or harm associated with vitamin D intake.
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Malinoski DJ, Patel MS, Ahmed O, Daly MC, Mooney S, Graybill CO, Foster CE, Salim A. The impact of meeting donor management goals on the development of delayed graft function in kidney transplant recipients. Am J Transplant 2013; 13:993-1000. [PMID: 23406284 DOI: 10.1111/ajt.12090] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Revised: 11/21/2012] [Accepted: 12/08/2012] [Indexed: 01/25/2023]
Abstract
Many organ procurement organizations (OPOs) utilize preset critical care endpoints as donor management goals (DMGs) in order to standardize care and improve outcomes. The objective of this study was to determine the impact of meeting DMGs on delayed graft function (DGF) in renal transplant recipients. All eight OPOs of the United Network for Organ Sharing Region 5 prospectively implemented nine DMGs in every donor after neurologic determination of death (DNDD). "DMGs met" was defined a priori as achieving any seven of the nine DMGs and this was recorded at the time of consent for donation to reflect donor hospital ICU management, 12-18 h later, and prior to organ recovery. Multivariable analyses were performed to identify independent predictors of DGF (dialysis in the first week after transplantation) with a p<0.05. A total of 722 transplanted kidneys from 492 DNDDs were included. A total of 28% developed DGF. DMGs were met at consent in 14%, 12-18 h in 32% and prior to recovery in 38%. DGF was less common when DMGs were met at consent (17% vs. 30%, p=0.007). Independent predictors of DGF were age, Cr and cold ischemia time, while meeting DMGs at consent was significantly protective. The management of potential organ donors prior to consent affects outcomes and should remain a priority in the intensive care unit.
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Affiliation(s)
- D J Malinoski
- Surgical Critical Care Section, Portland Veterans Affairs Medical Center, Portland, OR
| | - M S Patel
- Department of Surgery, Massachusetts General Hospital, Boston, MA
| | - O Ahmed
- Division of Transplantation Surgery, University of California Irvine, Orange, CA
| | - M C Daly
- Division of Transplantation Surgery, University of California Irvine, Orange, CA
| | - S Mooney
- Division of Transplantation Surgery, University of California Irvine, Orange, CA
| | | | - C E Foster
- Division of Transplantation Surgery, University of California Irvine, Orange, CA
| | - A Salim
- Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, CA
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Kon SSC, Clark AL, Dilaver D, Peasey MM, Canavan JL, Jones SE, Ng MGS, Patel MS, Polkey MI, Man WDC. P104 Response of the COPD Assessment Test (CAT) to Pulmonary Rehabilitation in Non-COPD Patients: Abstract P104 Table 1. Thorax 2012. [DOI: 10.1136/thoraxjnl-2012-202678.387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Patel MS, Mohan D, Kon SS, Canavan JL, Polkey MI. P77 The Short Physical Performance Battery is Associated with Peripheral Muscle Dysfunction and Physical Activity in COPD. Thorax 2012. [DOI: 10.1136/thoraxjnl-2012-202678.319] [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: 11/04/2022]
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Jones SE, Kon SSC, Canavan JL, Clark AL, Patel MS, Dilaver D, Peasey M, Ng MGS, Polkey MI, Man WDC. S109 Five-Repetition Sit-To-Stand Test: Reliability, Validity and Response to Pulmonary Rehabilitation in COPD. Thorax 2012. [DOI: 10.1136/thoraxjnl-2012-202678.114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Liu CT, Estrada K, Yerges-Armstrong LM, Amin N, Evangelou E, Li G, Minster RL, Carless MA, Kammerer CM, Oei L, Zhou Y, Alonso N, Dailiana Z, Eriksson J, García-Giralt N, Giroux S, Husted LB, Khusainova RI, Koromila T, Kung AW, Lewis JR, Masi L, Mencej-Bedrac S, Nogues X, Patel MS, Prezelj J, Richards JB, Sham PC, Spector T, Vandenput L, Xiao SM, Zheng HF, Zhu K, Balcells S, Brandi ML, Frost M, Goltzman D, González-Macías J, Karlsson M, Khusnutdinova EK, Kollia P, Langdahl BL, Ljunggren Ö, Lorentzon M, Marc J, Mellström D, Ohlsson C, Olmos JM, Ralston SH, Riancho JA, Rousseau F, Urreizti R, Van Hul W, Zarrabeitia MT, Castano-Betancourt M, Demissie S, Grundberg E, Herrera L, Kwan T, Medina-Gómez C, Pastinen T, Sigurdsson G, Thorleifsson G, vanMeurs JB, Blangero J, Hofman A, Liu Y, Mitchell BD, O’Connell JR, Oostra BA, Rotter JI, Stefansson K, Streeten EA, Styrkarsdottir U, Thorsteinsdottir U, Tylavsky FA, Uitterlinden A, Cauley JA, Harris TB, Ioannidis JP, Psaty BM, Robbins JA, Zillikens MC, vanDuijn CM, Prince RL, Karasik D, Rivadeneira F, Kiel DP, Cupples LA, Hsu YH. Assessment of gene-by-sex interaction effect on bone mineral density. J Bone Miner Res 2012; 27:2051-64. [PMID: 22692763 PMCID: PMC3447125 DOI: 10.1002/jbmr.1679] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Sexual dimorphism in various bone phenotypes, including bone mineral density (BMD), is widely observed; however, the extent to which genes explain these sex differences is unclear. To identify variants with different effects by sex, we examined gene-by-sex autosomal interactions genome-wide, and performed expression quantitative trait loci (eQTL) analysis and bioinformatics network analysis. We conducted an autosomal genome-wide meta-analysis of gene-by-sex interaction on lumbar spine (LS) and femoral neck (FN) BMD in 25,353 individuals from 8 cohorts. In a second stage, we followed up the 12 top single-nucleotide polymorphisms (SNPs; p < 1 × 10(-5) ) in an additional set of 24,763 individuals. Gene-by-sex interaction and sex-specific effects were examined in these 12 SNPs. We detected one novel genome-wide significant interaction associated with LS-BMD at the Chr3p26.1-p25.1 locus, near the GRM7 gene (male effect = 0.02 and p = 3.0 × 10(-5) ; female effect = -0.007 and p = 3.3 × 10(-2) ), and 11 suggestive loci associated with either FN- or LS-BMD in discovery cohorts. However, there was no evidence for genome-wide significant (p < 5 × 10(-8) ) gene-by-sex interaction in the joint analysis of discovery and replication cohorts. Despite the large collaborative effort, no genome-wide significant evidence for gene-by-sex interaction was found to influence BMD variation in this screen of autosomal markers. If they exist, gene-by-sex interactions for BMD probably have weak effects, accounting for less than 0.08% of the variation in these traits per implicated SNP. © 2012 American Society for Bone and Mineral Research.
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Affiliation(s)
- Ching-Ti Liu
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
| | - Karol Estrada
- Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Netherlands Genomics Initiative (NGI)-sponsored Netherlands Consortium for Healthy Aging (NCHA), Leiden, The Netherlands
| | - Laura M. Yerges-Armstrong
- Department of Medicine; Division of Endocrinology, Diabetes and Nutrition, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Najaf Amin
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Evangelos Evangelou
- Department of Hygiene and Epidemiology, University of Ioannina Medical School, Ioannina, Greece
| | - Guo Li
- Cardiovascular Health Research Unit, Dept. Med, University of Washington, Seattle, WA, USA
| | - Ryan L. Minster
- Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Melanie A. Carless
- Department of Genetics, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Candace M. Kammerer
- Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Ling Oei
- Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Netherlands Genomics Initiative (NGI)-sponsored Netherlands Consortium for Healthy Aging (NCHA), Leiden, The Netherlands
| | - Yanhua Zhou
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
| | - Nerea Alonso
- Rheumatic Diseases Unit, Centre for Molecular Medicine, MRC IGMM, University of Edinburgh, Edinburgh, United Kingdom
| | - Zoe Dailiana
- Department of Orthopaedic Surgery, Medical School University of Thessalia, Larissa, Greece
| | - Joel Eriksson
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | | | - Sylvie Giroux
- URGHM, Centre de recherche du CHUQ/HSFA, Québec City, Canada
| | - Lise Bjerre Husted
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus C, Denmark
| | - Rita I. Khusainova
- Ufa Scientific Centre of RAS, Institute of Biochemistry and Genetics, Russia, Ufa
- Biological, Bashkir State University, Russia, Ufa
| | - Theodora Koromila
- Department of Human Genetics, School of Biology, University of Athens, Athens, Greece
| | - Annie WaiChee Kung
- Department of Medicine, The University of Hong Kong, Hong Kong, China
- Research Centre of Heart, Brain, Hormone & Healthy Aging, The University of Hong Kong, Hong Kong, China
| | - Joshua R. Lewis
- School of Medicine and Pharmacology, University of Western Australia, Perth, Australia
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Perth, Australia
| | - Laura Masi
- Department of Internal Medicine, University of Florence, Florence, Italy
| | - Simona Mencej-Bedrac
- Department of Clinical Biochemistry, University of Ljubljana, Ljubljana, Slovenia
| | - Xavier Nogues
- Department of Internal Medicine, Hospital del Mar-IMIM, UAB, Barcelone, Spain
| | - Millan S. Patel
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - Janez Prezelj
- Department of Endocrinology, Diabetes and Metabolic Diseases, University Medical Center, Ljubljana, Slovenia
| | - J Brent Richards
- Department of Medicine, Human genetics and epidemiology & biostatistics, Lady Davis Institute, Jewish General Hospital, McGill University, Montreal, Canada
- Department of Twin Research and Genetic Epidemiology, King’s College, London, UK
| | - Pak Chung Sham
- Department of Psychiatry, The University of Hong Kong, Hong Kong, China
- Centre for Reproduction, Development and Growth, The University of Hong Kong, Hong Kong, China
| | - Timothy Spector
- Department of Twin Research and Genetic Epidemiology, King’s College, London, UK
| | - Liesbeth Vandenput
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Su-Mei Xiao
- Department of Medicine, The University of Hong Kong, Hong Kong, China
- Research Centre of Heart, Brain, Hormone & Healthy Aging, The University of Hong Kong, Hong Kong, China
| | - Hou-Feng Zheng
- Department of Medicine, Human genetics and epidemiology & biostatistics, Lady Davis Institute, Jewish General Hospital, McGill University, Montreal, Canada
| | - Kun Zhu
- School of Medicine and Pharmacology, University of Western Australia, Perth, Australia
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Perth, Australia
| | - Susana Balcells
- Department of Genetics, University of Barcelona, CIBERER, IBUB, Barcelone, Spain
| | - Maria Luisa Brandi
- Department of Internal Medicine, University of Florence, Florence, Italy
| | - Morten Frost
- Department of Endocrinology, Odense University Hospital, Odense, Denmark
- Clinical Institute, University of Southern Denmark, Odense, Denmark
| | - David Goltzman
- Department of Medicine, McGill University, Montreal, Canada
| | - Jesús González-Macías
- Department of Medicine, University of Cantabria, Santander, Spain
- Department of Internal Medicine, Hospital U.M. Valdecilla-IFIMAV, RETICEF, Santander, Spain
| | - Magnus Karlsson
- Clinical and Molecular Osteoporosis Research Unit, Department of Clinical Sciences and Department of Orthopaedics, Lund university, Malmö, Sweden
| | - Elza K. Khusnutdinova
- Ufa Scientific Centre of RAS, Institute of Biochemistry and Genetics, Russia, Ufa
- Biological, Bashkir State University, Russia, Ufa
| | - Panagoula Kollia
- Department of Human Genetics, School of Biology, University of Athens, Athens, Greece
| | - Bente Lomholt Langdahl
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus C, Denmark
| | - Östen Ljunggren
- Department of Medical Sciences, University of Uppsala, Uppsala, Sweden
| | - Mattias Lorentzon
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Janja Marc
- Department of Clinical Biochemistry, University of Ljubljana, Ljubljana, Slovenia
| | - Dan Mellström
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Claes Ohlsson
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - José M. Olmos
- Department of Medicine, University of Cantabria, Santander, Spain
- Department of Internal Medicine, Hospital U.M. Valdecilla-IFIMAV, RETICEF, Santander, Spain
| | - Stuart H. Ralston
- Rheumatic Diseases Unit, Centre for Molecular Medicine, MRC IGMM, University of Edinburgh, Edinburgh, United Kingdom
| | - José A. Riancho
- Department of Medicine, University of Cantabria, Santander, Spain
- Department of Internal Medicine, Hospital U.M. Valdecilla-IFIMAV, RETICEF, Santander, Spain
| | - François Rousseau
- URGHM, Centre de recherche du CHUQ/HSFA, Québec City, Canada
- Department of Molecular Biology, Medical Biochemistry and Pathology, Faculty of Medicine, Université Laval, Québec City, Canada
- The APOGEE-Net/CanGèneTest Network on Genetic Health Services and Policy, Université Laval, Québec City, Canada
| | - Roser Urreizti
- Department of Genetics, University of Barcelona, CIBERER, IBUB, Barcelone, Spain
| | - Wim Van Hul
- Department of Medical Genetics, University of Antwerp, Antwerp, Belgium
| | | | - Martha Castano-Betancourt
- Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Netherlands Genomics Initiative (NGI)-sponsored Netherlands Consortium for Healthy Aging (NCHA), Leiden, The Netherlands
| | - Serkalem Demissie
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
| | - Elin Grundberg
- The Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1HH, UK
| | - Lizbeth Herrera
- Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Tony Kwan
- Department of Human Genetics, McGill University and Genome Quebec Innovation Centre
| | - Carolina Medina-Gómez
- Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Netherlands Genomics Initiative (NGI)-sponsored Netherlands Consortium for Healthy Aging (NCHA), Leiden, The Netherlands
| | - Tomi Pastinen
- Department of Human Genetics, McGill University and Genome Quebec Innovation Centre
| | - Gunnar Sigurdsson
- Department of Endocrinology and Metabolism, University Hospital, Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | | | - Joyce B.J. vanMeurs
- Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Netherlands Genomics Initiative (NGI)-sponsored Netherlands Consortium for Healthy Aging (NCHA), Leiden, The Netherlands
| | - John Blangero
- Department of Genetics, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Albert Hofman
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Netherlands Genomics Initiative (NGI)-sponsored Netherlands Consortium for Healthy Aging (NCHA), Leiden, The Netherlands
| | - Yongmei Liu
- Center for Human Genomics, School of Medicine, Wake Forest University, Winston-Salem, NC, USA
| | - Braxton D. Mitchell
- Department of Medicine; Division of Endocrinology, Diabetes and Nutrition, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Jeffrey R. O’Connell
- Department of Medicine; Division of Endocrinology, Diabetes and Nutrition, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Ben A. Oostra
- Department of Clinical Genetics, Erasmus MC, Rotterdam, The Netherlands
- Centre for Medical Systems Biology & Netherlands Consortium on Healthy Aging, Leiden, The Netherlands
- Netherlands Genomic Initiative, the Hague, The Netherlands
| | - Jerome I Rotter
- Medical Genetics Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Kari Stefansson
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
- deCODE Genetics, Reykjavik, Iceland
| | - Elizabeth A. Streeten
- Department of Medicine; Division of Endocrinology, Diabetes and Nutrition, University of Maryland School of Medicine, Baltimore, MD, USA
- Geriatric Research and Education Clinical Center (GRECC), Veterans Administration Medical Center, Baltimore, MD, USA
| | | | - Unnur Thorsteinsdottir
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
- deCODE Genetics, Reykjavik, Iceland
| | - Frances A. Tylavsky
- Department of Preventive Medicine, College of Medicine, University of Tennessee, Memphis, TN, USA
| | - Andre Uitterlinden
- Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Netherlands Genomics Initiative (NGI)-sponsored Netherlands Consortium for Healthy Aging (NCHA), Leiden, The Netherlands
| | - Jane A. Cauley
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Tamara B. Harris
- Laboratory of Epidemiology, Demography, and Biometry, Intramural Research Program, National Institute on Aging, Bethesda, MD,USA
| | - John P.A. Ioannidis
- Department of Hygiene and Epidemiology, University of Ioannina Medical School, Ioannina, Greece
- Stanford Prevention Research Center, Department of Medicine and Department of Health Research and Policy, Stanford University School of Medicine, Stanford, CA, USA
| | - Bruce M. Psaty
- Cardiovascular Health Research Unit, Departments of Medicine, Epidemiology, and Health Services, University of Washington, Seattle, WA, USA
- Group Health Research Institute, Group Health Cooperative, Seattle, WA, USA
| | | | - M. Carola Zillikens
- Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Cornelia M. vanDuijn
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Centre for Medical Systems Biology & Netherlands Consortium on Healthy Aging, Leiden, The Netherlands
- Netherlands Genomic Initiative, the Hague, The Netherlands
| | - Richard L. Prince
- School of Medicine and Pharmacology, University of Western Australia, Perth, Australia
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Perth, Australia
| | - David Karasik
- Institute for Aging Research, Hebrew SeniorLife, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Fernando Rivadeneira
- Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Netherlands Genomics Initiative (NGI)-sponsored Netherlands Consortium for Healthy Aging (NCHA), Leiden, The Netherlands
| | - Douglas P. Kiel
- Institute for Aging Research, Hebrew SeniorLife, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - L. Adrienne Cupples
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
- Framingham Heart Study, Framingham, MA, USA
| | - Yi-Hsiang Hsu
- Institute for Aging Research, Hebrew SeniorLife, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- Molecular and Integrative Physiological Sciences Program, Harvard School of Public Health, Boston, MA, USA
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Patel MS, Jones MA, Jiggins M, Williams SC. Does the use of a "track and trigger" warning system reduce mortality in trauma patients? Injury 2011; 42:1455-9. [PMID: 21696724 DOI: 10.1016/j.injury.2011.05.030] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [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: 11/16/2010] [Accepted: 05/25/2011] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Despite the lack of robust evidence, numerous different "track and trigger" warning systems have been implemented. These have only been validated in an emergency medical admissions setting. The Modified Early Warning Score (MEWS) is the chosen track and trigger system used in the University Hospitals of Leicester trauma unit, but has not been validated in trauma patients. A considerable proportion of all trauma admissions are elderly patients with proximal femoral fractures and significant co-morbidities. Early recognition of physiological deterioration and prompt action could therefore be lifesaving in this patient group. AIM To identify whether the implementation of the MEWS system coupled with a critical care outreach service resulted in a reduction in mortality in a busy trauma unit. METHOD A retrospective study. The MEWS system was implemented in all trauma and orthopaedic wards at the Leicester Royal Infirmary in the summer of 2005. The numbers of emergency trauma inpatient admissions and deaths from January 2002 to December 2009 were obtained. The diagnosis, primary procedures and cause of death, if known, were noted. Comparisons were made pre- and post-MEWS. Student's t-test was used for statistical analysis. RESULTS 32,149 patients were admitted (55% male; 45% female). Overall there were 889 deaths (77% female; 33% male, P<0.0001). The in-hospital mortality rate for orthopaedic trauma patients was 2.8% throughout the 7-year study period. 61% of those who died were admitted with proximal femoral fractures. The modal age group with the highest mortality was 81-90 years. Overall, females had a considerably greater mortality rate than males. The mortality rate was lower post-MEWS in males (1.82-1.418%; P=0.214), females (4.871-3.364%; P=0.108) and all patients (3.215-2.294%; P=0.092), but this was not statistically significant. CONCLUSION The use of a track and trigger warning system has not led to a statistically significant reduction in mortality in trauma patients. In view of the apparent lack of clinical effectiveness of the MEWS/outreach partnership, the cost effectiveness of this initiative needs to be questioned. Possible reasons for these findings include: failure of the MEWS to be correctly applied, inadequate action once the threshold is triggered, or unsuitability of this tool for this patient population. A better system for identifying and treating elderly, medically unwell trauma patients with co-morbidities needs to be developed.
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Affiliation(s)
- M S Patel
- Trauma and Orthopaedic Department, Leicester General Hospital, Gwendolen Road, Leicester, LE5 4PW, United Kingdom.
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Affiliation(s)
- MS Patel
- Department of Pharmacy, University of Manchester, Manchester M13 9PL
| | - PH Elworthy
- Department of Pharmacy, University of Manchester, Manchester M13 9PL
| | - AK Dewsnup
- Department of Pharmacy, University of Manchester, Manchester M13 9PL
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Elworthy PH, Patel MS. Some Physico-Chemical Properties of a Polyoxybutylene - Polyoxyethylene Surfactant. J Pharm Pharmacol 2011. [DOI: 10.1111/j.2042-7158.1982.tb00854.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- P H Elworthy
- Department of Pharmacy, The University, Manchester M113 9PL
| | - M S Patel
- Department of Pharmacy, The University, Manchester M113 9PL
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Maricich SM, Aqeeb KA, Moayedi Y, Mathes EL, Patel MS, Chitayat D, Lyon G, Leroy JG, Zoghbi HY. Pontocerebellar hypoplasia: review of classification and genetics, and exclusion of several genes known to be important for cerebellar development. J Child Neurol 2011; 26:288-94. [PMID: 21383226 DOI: 10.1177/0883073810380047] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [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: 11/16/2022]
Abstract
The pontocerebellar hypoplasias are a heterogeneous group of rare and devastating conditions characterized by multiple structural abnormalities of the ventral pons, inferior olive, and cerebellum. Here, we briefly review these conditions and discuss genes recently discovered to be involved in pontocerebellar hypoplasia pathogenesis. We then present data that exclude several genes important for cerebellar development as causes of pontocerebellar hypoplasia-4 and pontocerebellar hypoplasia-5, and we demonstrate that not all cases of clinically defined pontocerebellar hypoplasia-4 result from mutations in TSEN54. We conclude that classification based on clinical, imaging, and neuropathological findings does not differentiate between pontocerebellar hypoplasia subtypes with different genetic causes.
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Affiliation(s)
- Stephen M Maricich
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH, USA
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Abstract
OBJECTIVES To analyze the aneuploidy risk and treatment outcome of prenatally diagnosed isolated clubfoot, to determine the false-positive rate (FPR) of ultrasound diagnosis and to calculate the risk of diagnostic revision to complex clubfoot. METHODS By chart review, 65 patients were retrospectively ascertained to have unilateral or bilateral clubfeet diagnosed prenatally. We calculated the rates of false positives, aneuploidy and diagnostic revision to complex clubfoot, and used an ad hoc scoring system to determine orthopedic outcome. Published rates of aneuploidy were pooled and evaluated. RESULTS Prenatally diagnosed isolated clubfoot FPR (defined as 1 - positive predictive value) was 10.5% (95% CI, 5.8-18%) (calculated per foot). After a minimum of 1-year postnatal follow-up, 13% (95% CI, 6-26%) of patients had revised diagnoses of complex clubfoot. No patients had aneuploidy identified by cytogenetic analysis or clinical assessment. Of the 34 patients with 2-year postnatal follow-up, 76.5% were treated with serial casting with or without Botox. All children with isolated clubfoot were walking and had an average outcome score of 'very good' to 'excellent'. CONCLUSIONS When counseling women regarding prenatally diagnosed isolated clubfoot, it is important to tell them that approximately 10% of individuals will have a normal foot or positional foot deformity requiring minimal treatment. Conversely, 10-13% of prenatally diagnosed cases of isolated clubfoot will have complex clubfoot postnatally, based on the finding of additional structural or neurodevelopmental abnormalities. Although this study did not identify an increased risk of fetal aneuploidy associated with isolated clubfoot, a review of the literature indicates a risk of 1.7-3.6% with predominance of sex chromosome aneuploidy.
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Affiliation(s)
- S Lauson
- Department of Medical Genetics, Children's and Women's Hospital of British Columbia, University of British Columbia, Vancouver, BC, Canada.
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Friedman J, Adam S, Arbour L, Armstrong L, Baross A, Birch P, Boerkoel C, Chan S, Chai D, Delaney AD, Flibotte S, Gibson WT, Langlois S, Lemyre E, Li HI, MacLeod P, Mathers J, Michaud JL, McGillivray BC, Patel MS, Qian H, Rouleau GA, Van Allen MI, Yong SL, Zahir FR, Eydoux P, Marra MA. Detection of pathogenic copy number variants in children with idiopathic intellectual disability using 500 K SNP array genomic hybridization. BMC Genomics 2009; 10:526. [PMID: 19917086 PMCID: PMC2781027 DOI: 10.1186/1471-2164-10-526] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2009] [Accepted: 11/16/2009] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Array genomic hybridization is being used clinically to detect pathogenic copy number variants in children with intellectual disability and other birth defects. However, there is no agreement regarding the kind of array, the distribution of probes across the genome, or the resolution that is most appropriate for clinical use. RESULTS We performed 500 K Affymetrix GeneChip array genomic hybridization in 100 idiopathic intellectual disability trios, each comprised of a child with intellectual disability of unknown cause and both unaffected parents. We found pathogenic genomic imbalance in 16 of these 100 individuals with idiopathic intellectual disability. In comparison, we had found pathogenic genomic imbalance in 11 of 100 children with idiopathic intellectual disability in a previous cohort who had been studied by 100 K GeneChip array genomic hybridization. Among 54 intellectual disability trios selected from the previous cohort who were re-tested with 500 K GeneChip array genomic hybridization, we identified all 10 previously-detected pathogenic genomic alterations and at least one additional pathogenic copy number variant that had not been detected with 100 K GeneChip array genomic hybridization. Many benign copy number variants, including one that was de novo, were also detected with 500 K array genomic hybridization, but it was possible to distinguish the benign and pathogenic copy number variants with confidence in all but 3 (1.9%) of the 154 intellectual disability trios studied. CONCLUSION Affymetrix GeneChip 500 K array genomic hybridization detected pathogenic genomic imbalance in 10 of 10 patients with idiopathic developmental disability in whom 100 K GeneChip array genomic hybridization had found genomic imbalance, 1 of 44 patients in whom 100 K GeneChip array genomic hybridization had found no abnormality, and 16 of 100 patients who had not previously been tested. Effective clinical interpretation of these studies requires considerable skill and experience.
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Affiliation(s)
- Jm Friedman
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada.
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