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Shimada S, Ng BG, White AL, Nickander KK, Turgeon C, Liedtke KL, Lam CT, Font-Montgomery E, Lourenço CM, He M, Peck DS, Umaña LA, Uhles CL, Haynes D, Wheeler PG, Bamshad MJ, Nickerson DA, Cushing T, Gates R, Gomez-Ospina N, Byers HM, Scalco FB, Martinez NN, Sachdev R, Smith L, Poduri A, Malone S, Harris R, Scheffer IE, Rosenzweig SD, Adams DR, Gahl WA, Malicdan MCV, Raymond KM, Freeze HH, Wolfe LA. Clinical, biochemical and genetic characteristics of MOGS-CDG: a rare congenital disorder of glycosylation. J Med Genet 2022; 59:jmedgenet-2021-108177. [PMID: 35790351 PMCID: PMC9813274 DOI: 10.1136/jmedgenet-2021-108177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 04/18/2022] [Indexed: 01/07/2023]
Abstract
PURPOSE To summarise the clinical, molecular and biochemical phenotype of mannosyl-oligosaccharide glucosidase-related congenital disorders of glycosylation (MOGS-CDG), which presents with variable clinical manifestations, and to analyse which clinical biochemical assay consistently supports diagnosis in individuals with bi-allelic variants in MOGS. METHODS Phenotypic characterisation was performed through an international and multicentre collaboration. Genetic testing was done by exome sequencing and targeted arrays. Biochemical assays on serum and urine were performed to delineate the biochemical signature of MOGS-CDG. RESULTS Clinical phenotyping revealed heterogeneity in MOGS-CDG, including neurological, immunological and skeletal phenotypes. Bi-allelic variants in MOGS were identified in 12 individuals from 11 families. The severity in each organ system was variable, without definite genotype correlation. Urine oligosaccharide analysis was consistently abnormal for all affected probands, whereas other biochemical analyses such as serum transferrin analysis was not consistently abnormal. CONCLUSION The clinical phenotype of MOGS-CDG includes multisystemic involvement with variable severity. Molecular analysis, combined with biochemical testing, is important for diagnosis. In MOGS-CDG, urine oligosaccharide analysis via matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry can be used as a reliable biochemical test for screening and confirmation of disease.
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Affiliation(s)
- Shino Shimada
- Medical Genetic Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
- Undiagnosed Diseases Program, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Bobby G. Ng
- Human Genetics Program, Sanford Burnham Prebys, La Jolla, CA, USA
| | - Amy L. White
- Biochemical Genetics Laboratory, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Kim. K. Nickander
- Biochemical Genetics Laboratory, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Coleman Turgeon
- Biochemical Genetics Laboratory, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Kristen L. Liedtke
- Biochemical Genetics Laboratory, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Christina T. Lam
- Division of Genetic Medicine, Department of Pediatrics, Seattle Children’s Hospital and University of Washington, Seattle, WA, USA
| | | | - Charles M. Lourenço
- Faculdade de Medicina, Centro Universitario Estácio de Ribeirão Preto, Ribeirão Preto, SP, Brazil
- Neurogenetics Unit, Faculdade de Medicina de São José do Rio Preto (FAMERP), São José do Rio Preto, SP, Brazil
| | - Miao He
- Department of Pathology and Laboratory Medicine, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Dawn S. Peck
- Biochemical Genetics Laboratory, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Luis A. Umaña
- Division of Genetics and Metabolism, Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Crescenda L. Uhles
- Department of Genetics, Children’s Medical Center Dallas, Dallas, TX, USA
| | - Devon Haynes
- Division of Genetics, Arnold Palmer Hospital for Children, Orlando Health, Orlando, FL, USA
| | - Patricia G. Wheeler
- Division of Genetics, Arnold Palmer Hospital for Children, Orlando Health, Orlando, FL, USA
| | - Michael J. Bamshad
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
- Department of Pediatrics, University of Washington, Seattle, WA, USA
| | | | - Tom Cushing
- Division of Pediatric Genetics, Department of Pediatrics, School of Medicine, University of New Mexico, Albuquerque, NM, USA
| | - Ryan Gates
- Division of Medical Genetics, Stanford University, Stanford, CA, USA
| | | | - Heather M. Byers
- Division of Medical Genetics, Stanford University, Stanford, CA, USA
| | | | - Fernanda B. Scalco
- Laboratório de Erros Inatos do Metabolismo/LABEIM, Instituto de Química, Universidade Federal do Rio de Janeiro, Departamento de Bioquímica, Avenida Horácio Macedo, 1281, Bloco C, Polo de Química, Cidade Universitária, Rio de Janeiro, RJ, Brazil
| | - Noelia N. Martinez
- Center for Clinical Genetics, Sydney Children’s Hospital-Randwick, Sydney, New South Wales, Australia
| | - Rani Sachdev
- Center for Clinical Genetics, Sydney Children’s Hospital-Randwick, Sydney, New South Wales, Australia
- School of Women’s & Children’s Health, University of New South Wales, Sydney, New South Wales, Australia
| | - Lacey Smith
- Department of Neurology, Boston Children’s Hospital and Harvard Medical School, Boston, MA, USA
| | - Annapurna Poduri
- Department of Neurology, Boston Children’s Hospital and Harvard Medical School, Boston, MA, USA
| | - Stephen Malone
- Department of Neurosciences, Queensland Children’s Hospital, Brisbane, Queensland, Australia
| | - Rebekah Harris
- Department of Medicine, University of Melbourne, Austin Health, Heidelberg, VIC, Australia
| | - Ingrid E. Scheffer
- Department of Medicine, University of Melbourne, Austin Health, Heidelberg, VIC, Australia
- Department of Pediatrics, The University of Melbourne, Royal Children’s Hospital, Parkville, VIC, Australia
- Murdoch Children’s Research Institute and Florey Institute, Melbourne, VIC, Australia
| | - Sergio D. Rosenzweig
- Department of Laboratory Medicine, Clinical Center, and Primary Immunodeficiency Clinic, National Institute of Allergy and Infectious Diseases, National Institute of Health, Bethesda, MD, USA
| | - David R. Adams
- Medical Genetic Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
- Undiagnosed Diseases Program, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - William A. Gahl
- Medical Genetic Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
- Undiagnosed Diseases Program, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - May CV. Malicdan
- Medical Genetic Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
- Undiagnosed Diseases Program, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
- Senior authors and contributed equally
| | - Kimiyo M. Raymond
- Biochemical Genetics Laboratory, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA
- Senior authors and contributed equally
| | - Hudson H. Freeze
- Human Genetics Program, Sanford Burnham Prebys, La Jolla, CA, USA
- Senior authors and contributed equally
| | - Lynne A. Wolfe
- Medical Genetic Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
- Undiagnosed Diseases Program, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
- Senior authors and contributed equally
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Tise CG, Matalon DR, Manning MA, Byers HM, Grover M. Short Bones, Renal Stones, and Diagnostic Moans: Hypercalcemia in a Girl Found to Have Coffin-Lowry Syndrome. J Investig Med High Impact Case Rep 2022; 10:23247096221101844. [PMID: 35638718 PMCID: PMC9160898 DOI: 10.1177/23247096221101844] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 04/15/2022] [Accepted: 05/01/2022] [Indexed: 11/30/2022] Open
Abstract
Pathogenic variants in RPS6KA3 are associated with Coffin-Lowry syndrome (CLS), an X-linked semidominant disorder characterized by intellectual disability, stimulus-induced drop attacks, distinctive facial features, progressive kyphoscoliosis, and digit anomalies in hemizygous males. Heterozygous females may also have features of CLS; however, there can be considerable phenotypic variation, often attributed to ratios of X-inactivation in various tissue types. Although skeletal anomalies and short stature are hallmarks of CLS, hypercalcemia has not been reported. Here we describe a 30-month-old girl with gross motor delays, short stature, dysmorphic features, bilateral duplicated renal collecting systems, and no family history of hypercalcemia who required multiple admissions for idiopathic hypercalcemia necessitating bisphosphonate infusions at 12.5 and 15 months of age. A maternally inherited likely-pathogenic variant in RPS6KA3 was identified by trio exome sequencing, consistent with the diagnosis of CLS in the proband and her mother. Maternal history was notable only for decreased height compared to first-degree relatives, bilateral genu valgum, and a bicornuate uterus; she was later found to also have a partially duplicated left renal collecting system. Subsequent X-inactivation studies in blood aligned with the phenotypic variation between mother and daughter. Although hypercalcemia is not a reported feature in CLS, there is evidence of interrupted osteoblast differentiation, providing a potential mechanism for hypercalcemia in this genetic condition. The hypercalcemia in this case may represent a severe presentation of an unrecognized clinical feature in CLS that resolves with age. This case further highlights the intrafamilial phenotypic variation of CLS among females, suggesting X-inactivation as the underlying mechanism, and demonstrates the value of exome sequencing in patients for whom a genetic disorder is highly suspected but not identified despite thorough evaluation.
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Tise CG, Byers HM. Genetics of recurrent pregnancy loss: a review. Curr Opin Obstet Gynecol 2021; 33:106-111. [PMID: 33605623 DOI: 10.1097/gco.0000000000000695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW Human reproduction is remarkably inefficient; with pregnancy loss occurring in 10-30% of clinically recognized pregnancies. Of those, 3-5% of couples experience recurrent pregnancy loss (RPL), more than 50% of who never receive an underlying diagnosis. Herein, we review evidence that genetic changes, including pathogenic variant(s) in highly penetrant genes, may provide an explanation for a proportion of couples with pregnancy loss. RECENT FINDINGS Genetic abnormalities that may predispose to pregnancy loss include chromosomal aneuploidy, copy number variants, single-gene changes and others. Although previously limited by the need for hypothesis-driven assessment, advancement of various molecular technologies have sheparded in the opportunity to identify molecular cause of highly heterogeneous conditions, including RPL. The identification of causative genetic aberrations associated with RPL demonstrates a promising area of further research. SUMMARY The journey of human development from a single-cell zygote to a term infant is complex process. Early research into copy number variants and highly penetrant single-gene changes may provide diagnosis for a proportion of couples with RPL as well as inform genes critical for early human development.
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Affiliation(s)
- Christina G Tise
- Division of Medical Genetics, Department of Pediatrics, Stanford University, Stanford, California, USA
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4
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Freed AS, Candadai SVC, Sikes MC, Thies J, Byers HM, Dines JN, Ndugga-Kabuye MK, Smith MB, Fogus K, Mefford HC, Lam C, Adam MP, Sun A, McGuire JK, DiGeronimo R, Dipple KM, Deutsch GH, Billimoria ZC, Bennett JT. The Impact of Rapid Exome Sequencing on Medical Management of Critically Ill Children. J Pediatr 2020; 226:202-212.e1. [PMID: 32553838 PMCID: PMC7736066 DOI: 10.1016/j.jpeds.2020.06.020] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [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] [Received: 03/02/2020] [Revised: 04/23/2020] [Accepted: 06/08/2020] [Indexed: 12/15/2022]
Abstract
OBJECTIVES To evaluate the clinical usefulness of rapid exome sequencing (rES) in critically ill children with likely genetic disease using a standardized process at a single institution. To provide evidence that rES with should become standard of care for this patient population. STUDY DESIGN We implemented a process to provide clinical-grade rES to eligible children at a single institution. Eligibility included (a) recommendation of rES by a consulting geneticist, (b) monogenic disorder suspected, (c) rapid diagnosis predicted to affect inpatient management, (d) pretest counseling provided by an appropriate provider, and (e) unanimous approval by a committee of 4 geneticists. Trio exome sequencing was sent to a reference laboratory that provided verbal report within 7-10 days. Clinical outcomes related to rES were prospectively collected. Input from geneticists, genetic counselors, pathologists, neonatologists, and critical care pediatricians was collected to identify changes in management related to rES. RESULTS There were 54 patients who were eligible for rES over a 34-month study period. Of these patients, 46 underwent rES, 24 of whom (52%) had at least 1 change in management related to rES. In 20 patients (43%), a molecular diagnosis was achieved, demonstrating that nondiagnostic exomes could change medical management in some cases. Overall, 84% of patients were under 1 month old at rES request and the mean turnaround time was 9 days. CONCLUSIONS rES testing has a significant impact on the management of critically ill children with suspected monogenic disease and should be considered standard of care for tertiary institutions who can provide coordinated genetics expertise.
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Affiliation(s)
- Amanda S. Freed
- Department of Pediatrics, Division of Genetic Medicine, University of Washington, Seattle WA
| | - Sarah V. Clowes Candadai
- Department of Laboratories, Seattle Children’s Hospital, Seattle WA,Patient-centered Laboratory Utilization Guidance Services (PLUGS), Seattle Children’s Hospital, Seattle WA
| | - Megan C. Sikes
- Division of Genetic Medicine, Seattle Children’s Hospital, Seattle WA
| | - Jenny Thies
- Division of Genetic Medicine, Seattle Children’s Hospital, Seattle WA
| | - Heather M. Byers
- Department of Pediatrics, Division of Genetic Medicine, University of Washington, Seattle WA
| | - Jennifer N. Dines
- Department of Pediatrics, Division of Genetic Medicine, University of Washington, Seattle WA
| | | | - Mallory B. Smith
- Department of Pediatrics, Division of Pediatric Critical Care, University of Washington, Seattle WA
| | - Katie Fogus
- Division of Genetic Medicine, Seattle Children’s Hospital, Seattle WA
| | - Heather C. Mefford
- Department of Pediatrics, Division of Genetic Medicine, University of Washington, Seattle WA,Division of Genetic Medicine, Seattle Children’s Hospital, Seattle WA,Brotman Baty Institute for Precision Medicine, Seattle WA
| | - Christina Lam
- Department of Pediatrics, Division of Genetic Medicine, University of Washington, Seattle WA,Division of Genetic Medicine, Seattle Children’s Hospital, Seattle WA,Brotman Baty Institute for Precision Medicine, Seattle WA,Center for Integrative Brain Research, Seattle Children’s Research Institute, Seattle WA
| | - Margaret P. Adam
- Department of Pediatrics, Division of Genetic Medicine, University of Washington, Seattle WA,Division of Genetic Medicine, Seattle Children’s Hospital, Seattle WA
| | - Angela Sun
- Department of Pediatrics, Division of Genetic Medicine, University of Washington, Seattle WA,Division of Genetic Medicine, Seattle Children’s Hospital, Seattle WA
| | - John K. McGuire
- Department of Pediatrics, Division of Pediatric Critical Care, University of Washington, Seattle WA
| | - Robert DiGeronimo
- Department of Pediatrics, Division of Neonatology, University of Washington, Seattle WA
| | - Katrina M. Dipple
- Department of Pediatrics, Division of Genetic Medicine, University of Washington, Seattle WA,Division of Genetic Medicine, Seattle Children’s Hospital, Seattle WA,Center for Clinical and Translational Research, Seattle Children’s Research Institute, Seattle WA
| | - Gail H. Deutsch
- Department of Pathology, University of Washington and Seattle Children’s Hospital, Seattle WA
| | - Zeenia C. Billimoria
- Department of Pediatrics, Division of Neonatology, University of Washington, Seattle WA
| | - James T. Bennett
- Department of Pediatrics, Division of Genetic Medicine, University of Washington, Seattle WA,Division of Genetic Medicine, Seattle Children’s Hospital, Seattle WA,Brotman Baty Institute for Precision Medicine, Seattle WA,Center for Developmental Biology and Regenerative Medicine, Seattle Children’s Research Institute, Seattle WA
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5
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Regier DS, Smith WE, Byers HM. Medical genetics education in the midst of the COVID-19 pandemic: Shared resources. Am J Med Genet A 2020; 182:1302-1308. [PMID: 32323908 PMCID: PMC7264783 DOI: 10.1002/ajmg.a.61595] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [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: 03/30/2020] [Accepted: 04/06/2020] [Indexed: 11/12/2022]
Abstract
In the midst of the COVID‐19 pandemic, it is appropriate that our focus is on patient care and preparation. However, the genetics community is well poised to fill in the educational gap created by medical students transitioning to limiting patient contact, creation of telemedicine patient care, and online learning modules. Our history of agility in learning and teaching is now only inhibited by the time constraints of current clinical demands on the genetics community. This publication is designed to offer ideas and resources for quickly transitioning our education to meet the current demands in the time of a pandemic. Not only will this allow us to continue our strong history of education, it will enhance our strong commitment to using modern educational techniques and tools to address the genetics workforce issues that have defined the recent past. We have the opportunity to aggressively educate for trainees that now have the capacity to learn, and to lead the way in showing how the genetics community rallies together no matter the challenge.
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Affiliation(s)
- Debra S Regier
- Department of Genetics & Metabolism, Children's National Hospital, Washington, District of Columbia, United States
| | - Wendy E Smith
- Division of Genetics, Maine Medical Center, Portland, Maine, United States
| | - Heather M Byers
- Department of Medical Genetics, Stanford University School of Medicine, Stanford, California, United States
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6
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Chang IJ, Byers HM, Ng BG, Merritt JL, Gilmore R, Shrimal S, Wei W, Zhang Y, Blair AB, Freeze HH, Zhang B, Lam C. Factor VIII and vWF deficiency in STT3A-CDG. J Inherit Metab Dis 2019; 42:325-332. [PMID: 30701557 PMCID: PMC6658093 DOI: 10.1002/jimd.12021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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] [Received: 09/20/2018] [Revised: 11/08/2018] [Accepted: 12/06/2018] [Indexed: 11/09/2022]
Abstract
STT3A-CDG (OMIM# 615596) is an autosomal recessive N-linked glycosylation disorder characterized by seizures, developmental delay, intellectual disability, and a type I carbohydrate deficient transferrin pattern. All previously reported cases (n = 6) have been attributed to a homozygous pathogenic missense variant c.1877C>T (p.Val626Ala) in STT3A. We describe a patient with a novel homozygous likely pathogenic missense variant c.1079A>C (p.Tyr360Ser) who presents with chronically low Factor VIII (FVIII) and von Willebrand Factor (vWF) levels and activities in addition to the previously reported symptoms of developmental delay and seizures. VWF in our patient's plasma is present in a mildly hypoglycosylated form. FVIII antigen levels were too low to quantify in our patient. Functional studies with STT3A-/- HEK293 cells showed severely reduced FVIII antigen and activity levels in conditioned media <10% expected, but normal intracellular levels. We also show decreased glycosylation of STT3A-specific acceptors in fibroblasts from our patient, providing a mechanistic explanation for how STT3A deficiency leads to a severe defect in FVIII secretion. Our results suggest that certain STT3A-dependent N-glycans are required for efficient FVIII secretion, and the decreased FVIII level in our patient is a combined effect of both severely impaired FVIII secretion and lower plasma VWF level. Our report expands both the genotype and phenotype of STT3A-CDG; demonstrating, as in most types of CDG, that there are multiple disease-causing variants in STT3A.
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Affiliation(s)
- Irene J. Chang
- Department of Pediatrics, Division of Medical Genetics, University of Washington, Seattle, Washington
| | - Heather M. Byers
- Department of Pediatrics, Division of Medical Genetics, Stanford University, Stanford, California
| | - Bobby G. Ng
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California
| | - John Lawrence Merritt
- Department of Pediatrics, Division of Medical Genetics, University of Washington, Seattle, Washington
| | - Reid Gilmore
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Shiteshu Shrimal
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Wei Wei
- Genomic Medicine Institute, Cleveland Clinic, Cleveland, Ohio
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio
| | - Yuan Zhang
- Genomic Medicine Institute, Cleveland Clinic, Cleveland, Ohio
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio
| | - Amanda B. Blair
- Department of Pediatrics, Division of Hematology-Oncology, University of Washington, Seattle, Washington
| | - Hudson H. Freeze
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California
| | - Bin Zhang
- Genomic Medicine Institute, Cleveland Clinic, Cleveland, Ohio
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio
| | - Christina Lam
- Department of Pediatrics, Division of Medical Genetics, University of Washington, Seattle, Washington
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Affiliation(s)
- Katrina Heyrana
- National Institutes of Health, Bethesda, Maryland
- now with Department of Obstetrics and Gynecology, University of Rochester, Rochester, New York
| | - Heather M Byers
- National Institutes of Health, Bethesda, Maryland
- now with Division of Medical Genetics, Stanford University, Stanford, California
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Byers HM, Jensen DM, Glass IA, Bennett JT. Minimal mosaicism, maximal phenotype: Discordance between clinical and molecular findings in two patients with tuberous sclerosis. Am J Med Genet 2018; 178:374-378. [DOI: 10.1002/ajmg.c.31656] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 09/07/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Heather M. Byers
- Division of Medical Genetics, Department of PediatricsStanford University School of Medicine Stanford California
| | - Dana M. Jensen
- Center for Developmental Biology and Regenerative MedicineSeattle Children's Research Institute Seattle Washington
| | - Ian A. Glass
- Department of Pediatrics, Division of Genetic MedicineUniversity of Washington School of Medicine Seattle Washington
| | - James T. Bennett
- Center for Developmental Biology and Regenerative MedicineSeattle Children's Research Institute Seattle Washington
- Department of Pediatrics, Division of Genetic MedicineUniversity of Washington School of Medicine Seattle Washington
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Byers HM, Jacobson A, McFaddin AS, Ussakli CH, Newlin A, Stanich PP, More S, Hamblett A, Tait JF, Shirts B, Pritchard CC, Konnick EQ, Lockwood CM. Postmortem Somatic Sequencing of Tumors From Patients With Suspected Lynch Syndrome Has Clinical Utility for Surviving Relatives. JCO Precis Oncol 2018; 2:1800108. [PMID: 32913991 DOI: 10.1200/po.18.00108] [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: 11/20/2022] Open
Affiliation(s)
- Heather M Byers
- , Stanford University, Palo Alto, CA; , , , , , , and , University of Washington, Seattle, WA; , NorthShore University HealthSystem, Evanston, IL; , Ohio State University, Columbus, OH; , Sarah Lawrence College, Calgary, Alberta, Canada; and , Middlesex Hospital Cancer Center, Middletown, CT
| | - Angela Jacobson
- , Stanford University, Palo Alto, CA; , , , , , , and , University of Washington, Seattle, WA; , NorthShore University HealthSystem, Evanston, IL; , Ohio State University, Columbus, OH; , Sarah Lawrence College, Calgary, Alberta, Canada; and , Middlesex Hospital Cancer Center, Middletown, CT
| | - Andrew S McFaddin
- , Stanford University, Palo Alto, CA; , , , , , , and , University of Washington, Seattle, WA; , NorthShore University HealthSystem, Evanston, IL; , Ohio State University, Columbus, OH; , Sarah Lawrence College, Calgary, Alberta, Canada; and , Middlesex Hospital Cancer Center, Middletown, CT
| | - Cigdem H Ussakli
- , Stanford University, Palo Alto, CA; , , , , , , and , University of Washington, Seattle, WA; , NorthShore University HealthSystem, Evanston, IL; , Ohio State University, Columbus, OH; , Sarah Lawrence College, Calgary, Alberta, Canada; and , Middlesex Hospital Cancer Center, Middletown, CT
| | - Anna Newlin
- , Stanford University, Palo Alto, CA; , , , , , , and , University of Washington, Seattle, WA; , NorthShore University HealthSystem, Evanston, IL; , Ohio State University, Columbus, OH; , Sarah Lawrence College, Calgary, Alberta, Canada; and , Middlesex Hospital Cancer Center, Middletown, CT
| | - Peter P Stanich
- , Stanford University, Palo Alto, CA; , , , , , , and , University of Washington, Seattle, WA; , NorthShore University HealthSystem, Evanston, IL; , Ohio State University, Columbus, OH; , Sarah Lawrence College, Calgary, Alberta, Canada; and , Middlesex Hospital Cancer Center, Middletown, CT
| | - Stephanie More
- , Stanford University, Palo Alto, CA; , , , , , , and , University of Washington, Seattle, WA; , NorthShore University HealthSystem, Evanston, IL; , Ohio State University, Columbus, OH; , Sarah Lawrence College, Calgary, Alberta, Canada; and , Middlesex Hospital Cancer Center, Middletown, CT
| | - Amanda Hamblett
- , Stanford University, Palo Alto, CA; , , , , , , and , University of Washington, Seattle, WA; , NorthShore University HealthSystem, Evanston, IL; , Ohio State University, Columbus, OH; , Sarah Lawrence College, Calgary, Alberta, Canada; and , Middlesex Hospital Cancer Center, Middletown, CT
| | - Jonathan F Tait
- , Stanford University, Palo Alto, CA; , , , , , , and , University of Washington, Seattle, WA; , NorthShore University HealthSystem, Evanston, IL; , Ohio State University, Columbus, OH; , Sarah Lawrence College, Calgary, Alberta, Canada; and , Middlesex Hospital Cancer Center, Middletown, CT
| | - Brian Shirts
- , Stanford University, Palo Alto, CA; , , , , , , and , University of Washington, Seattle, WA; , NorthShore University HealthSystem, Evanston, IL; , Ohio State University, Columbus, OH; , Sarah Lawrence College, Calgary, Alberta, Canada; and , Middlesex Hospital Cancer Center, Middletown, CT
| | - Colin C Pritchard
- , Stanford University, Palo Alto, CA; , , , , , , and , University of Washington, Seattle, WA; , NorthShore University HealthSystem, Evanston, IL; , Ohio State University, Columbus, OH; , Sarah Lawrence College, Calgary, Alberta, Canada; and , Middlesex Hospital Cancer Center, Middletown, CT
| | - Eric Q Konnick
- , Stanford University, Palo Alto, CA; , , , , , , and , University of Washington, Seattle, WA; , NorthShore University HealthSystem, Evanston, IL; , Ohio State University, Columbus, OH; , Sarah Lawrence College, Calgary, Alberta, Canada; and , Middlesex Hospital Cancer Center, Middletown, CT
| | - Christina M Lockwood
- , Stanford University, Palo Alto, CA; , , , , , , and , University of Washington, Seattle, WA; , NorthShore University HealthSystem, Evanston, IL; , Ohio State University, Columbus, OH; , Sarah Lawrence College, Calgary, Alberta, Canada; and , Middlesex Hospital Cancer Center, Middletown, CT
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Ferreira CR, Goorden SMI, Soldatos A, Byers HM, Ghauharali-van der Vlugt JMM, Beers-Stet FS, Groden C, van Karnebeek CD, Gahl WA, Vaz FM, Jiang X, Vernon HJ. Deoxysphingolipid precursors indicate abnormal sphingolipid metabolism in individuals with primary and secondary disturbances of serine availability. Mol Genet Metab 2018; 124:204-209. [PMID: 29789193 PMCID: PMC6057808 DOI: 10.1016/j.ymgme.2018.05.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [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] [Received: 03/28/2018] [Revised: 05/02/2018] [Accepted: 05/03/2018] [Indexed: 12/27/2022]
Abstract
Patients with primary serine biosynthetic defects manifest with intellectual disability, microcephaly, ichthyosis, seizures and peripheral neuropathy. The underlying pathogenesis of peripheral neuropathy in these patients has not been elucidated, but could be related to a decrease in the availability of certain classical sphingolipids, or to an increase in atypical sphingolipids. Here, we show that patients with primary serine deficiency have a statistically significant elevation in specific atypical sphingolipids, namely deoxydihydroceramides of 18-22 carbons in acyl length. We also show that patients with aberrant plasma serine and alanine levels secondary to mitochondrial disorders also display peripheral neuropathy along with similar elevations of atypical sphingolipids. We hypothesize that the etiology of peripheral neuropathy in patients with primary mitochondrial disorders is related to this elevation of deoxysphingolipids, in turn caused by increased availability of alanine and decreased availability of serine. These findings could have important therapeutic implications for the management of these patients.
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Affiliation(s)
- C R Ferreira
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA; Division of Genetics and Metabolism, Children's National Health System, Washington, DC, USA
| | - S M I Goorden
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - A Soldatos
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - H M Byers
- Division of Medical Genetics, Stanford University, Palo Alto, CA, USA
| | | | - F S Beers-Stet
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - C Groden
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - C D van Karnebeek
- Departments of Pediatrics and Clinical Genetics, Academic Medical Centre, Amsterdam, The Netherlands
| | - W A Gahl
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - F M Vaz
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - X Jiang
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - H J Vernon
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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11
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Byers HM, Chen M, Gelfand AS, Ong B, Jendras M, Glass IA. Expanding the phenotype of congenital central hypoventilation syndrome impacts management decisions. Am J Med Genet A 2018; 176:1398-1404. [PMID: 29696799 DOI: 10.1002/ajmg.a.38726] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 04/01/2018] [Accepted: 04/04/2018] [Indexed: 11/10/2022]
Abstract
Congenital central hypoventilation syndrome (CCHS) is a neurocristopathy caused by pathogenic heterozygous variants in the gene paired-like homeobox 2b (PHOX2B). It is characterized by severe infantile alveolar hypoventilation. Individuals may also have diffuse autonomic nervous system dysfunction, Hirschsprung disease and neural crest tumors. We report three individuals with CCHS due to an 8-base pair duplication in PHOX2B; c.691_698dupGGCCCGGG (p.Gly234Alafs*78) with a predominant enteral and neural crest phenotype and a relatively mild respiratory phenotype. The attenuated respiratory phenotype reported here and elsewhere suggests an emergent genotype:phenotype correlation which challenges the current paradigm of invoking mechanical ventilation for all infants diagnosed with CCHS. Best treatment requires careful clinical judgment and ideally the assistance of a care team with expertise in CCHS.
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Affiliation(s)
- Heather M Byers
- Division of Medical Genetics, Department of Pediatrics, Stanford University, Palo Alto, California
| | - Maida Chen
- Department of Pediatrics, University of Washington, Seattle, Washington.,Division of Pulmonary Medicine, Seattle Children's Hospital, Seattle, Washington
| | | | - Bruce Ong
- Division of Pediatric Pulmonology, Tripler Army Medical Center, Honolulu, Hawaii
| | | | - Ian A Glass
- Department of Pediatrics, University of Washington, Seattle, Washington.,Division of Medical Genetics, Seattle Children's Hospital, Seattle, Washington
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12
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Li H, Byers HM, Diaz-Kuan A, Vos MB, Hall PL, Tortorelli S, Singh R, Wallenstein MB, Allain M, Dimmock DP, Farrell RM, McCandless S, Gambello MJ. Acute liver failure in neonates with undiagnosed hereditary fructose intolerance due to exposure from widely available infant formulas. Mol Genet Metab 2018; 123:428-432. [PMID: 29510902 DOI: 10.1016/j.ymgme.2018.02.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 02/23/2018] [Accepted: 02/23/2018] [Indexed: 12/22/2022]
Abstract
Hereditary fructose intolerance (HFI) is an autosomal recessive disorder caused by aldolase B (ALDOB) deficiency resulting in an inability to metabolize fructose. The toxic accumulation of intermediate fructose-1-phosphate causes multiple metabolic disturbances, including postprandial hypoglycemia, lactic acidosis, electrolyte disturbance, and liver/kidney dysfunction. The clinical presentation varies depending on the age of exposure and the load of fructose. Some common infant formulas contain fructose in various forms, such as sucrose, a disaccharide of fructose and glucose. Exposure to formula containing fructogenic compounds is an important, but often overlooked trigger for severe metabolic disturbances in HFI. Here we report four neonates with undiagnosed HFI, all caused by the common, homozygous mutation c.448G>C (p.A150P) in ALDOB, who developed life-threatening acute liver failure due to fructose-containing formulas. These cases underscore the importance of dietary history and consideration of HFI in cases of neonatal or infantile acute liver failure for prompt diagnosis and treatment of HFI.
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Affiliation(s)
- Hong Li
- Department of Human Genetics, School of Medicine, Emory University, Atlanta, GA, United States; Department of Pediatrics, School of Medicine, Emory University, Children's Healthcare of Atlanta, Atlanta, GA, United States.
| | - Heather M Byers
- Division of Medical Genetics, Department of Pediatrics, School of Medicine, Stanford University, Palo Alto, CA, United States
| | - Alicia Diaz-Kuan
- Department of Human Genetics, School of Medicine, Emory University, Atlanta, GA, United States
| | - Miriam B Vos
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, School of Medicine, Emory University, Atlanta, GA, United States
| | | | - Silvia Tortorelli
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, United States
| | - Rani Singh
- Department of Human Genetics, School of Medicine, Emory University, Atlanta, GA, United States; Department of Pediatrics, School of Medicine, Emory University, Children's Healthcare of Atlanta, Atlanta, GA, United States
| | - Matthew B Wallenstein
- Division of Neonatal and Developmental Medicine, Department of Pediatrics, School of Medicine, Stanford University, Palo Alto, CA, United States
| | - Meredith Allain
- Division of Medical Genetics, Department of Pediatrics, School of Medicine, Stanford University, Palo Alto, CA, United States
| | - David P Dimmock
- Rady Children's Institute for Genomic Medicine, San Diego, CA, United States
| | - Ryan M Farrell
- Department of Pediatrics, Case Western Reserve University, University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Shawn McCandless
- Department of Pediatrics, Case Western Reserve University, University Hospitals Cleveland Medical Center, Cleveland, OH, United States; Department of Genetics and Genome Sciences, Case Western Reserve University, University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Michael J Gambello
- Department of Human Genetics, School of Medicine, Emory University, Atlanta, GA, United States; Department of Pediatrics, School of Medicine, Emory University, Children's Healthcare of Atlanta, Atlanta, GA, United States
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13
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Byers HM, Mohnach LH, Fechner PY, Chen M, Thomas IH, Ramsdell LA, Shnorhavorian M, McCauley EA, Amies Oelschlager AME, Park JM, Sandberg DE, Adam MP, Keegan CE. Unexpected ethical dilemmas in sex assignment in 46,XY DSD due to 5-alpha reductase type 2 deficiency. Am J Med Genet C Semin Med Genet 2017; 175:260-267. [PMID: 28544750 DOI: 10.1002/ajmg.c.31560] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 03/23/2017] [Accepted: 03/31/2017] [Indexed: 11/10/2022]
Abstract
Sex assignment at birth remains one of the most clinically challenging and controversial topics in 46,XY disorders of sexual development (DSD). This is particularly challenging in deficiency of 5-alpha reductase type 2 given that external genitalia are typically undervirilized at birth but typically virilize at puberty to a variable degree. Historically, most individuals with 5-alpha reductase deficiency were raised females. However, reports that over half of patients who underwent a virilizing puberty adopted an adult male gender identity have challenged this practice. Consensus guidelines on assignment of sex of rearing at birth are equivocal or favor male assignment in the most virilized cases. While a male sex of rearing assignment may avoid lifelong hormonal therapy and/or allow the potential for fertility, female sex assignment may be more consistent with external anatomy in the most severely undervirilized cases. Herein, we describe five patients with 46,XY DSD due 5-alpha-reductase type 2 deficiency, all with a severe phenotype. An inter-disciplinary DSD medical team at one of two academic centers evaluated each patient. This case series illustrates the complicated decision-making process of assignment of sex of rearing at birth in 5-alpha reductase type 2 deficiency and the challenges that arise when the interests of the child, parental wishes, recommendations of the medical team, and state law collide.
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Affiliation(s)
- Heather M Byers
- Division of Medical Genetics, University of Washington, Seattle, Washington
| | - Lauren H Mohnach
- DSD Program, Department of Pediatrics, University of Michigan, Ann Arbor, Michigan
| | - Patricia Y Fechner
- Division of Endocrinology, Seattle Children's Hospital, Seattle, Washington.,Division of Pediatric Psychology, Seattle Children's Hospital, Seattle, Washington
| | - Ming Chen
- Division of Endocrinology, Department of Pediatrics, University of Michigan, Ann Arbor, Michigan
| | - Inas H Thomas
- Division of Endocrinology, Department of Pediatrics, University of Michigan, Ann Arbor, Michigan
| | - Linda A Ramsdell
- Division of Genetic Medicine, Seattle Children's Hospital, Seattle, Washington
| | | | - Elizabeth A McCauley
- Department of Psychiatry and Behavior Medicine, University of Washington, Seattle, Washington
| | | | - John M Park
- Department of Urology, University of Michigan, Ann Arbor, Michigan
| | - David E Sandberg
- Division of Pediatric Psychology, Department of Pediatrics, University of Michigan, Ann Arbor, Michigan
| | - Margaret P Adam
- Division of Medical Genetics, University of Washington, Seattle, Washington.,Division of Genetic Medicine, Seattle Children's Hospital, Seattle, Washington
| | - Catherine E Keegan
- Division of Genetics, Department of Pediatrics, University of Michigan, Ann Arbor, Michigan
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14
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Byers HM, Adam MP, LaCroix A, Leary SES, Cole B, Dobyns WB, Mefford HC. Description of a new oncogenic mechanism for atypical teratoid rhabdoid tumors in patients with ring chromosome 22. Am J Med Genet A 2016; 173:245-249. [PMID: 27734605 DOI: 10.1002/ajmg.a.37993] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Accepted: 09/18/2016] [Indexed: 11/11/2022]
Abstract
Atypical teratoid rhabdoid tumors of the central nervous system are rare, highly malignant, embryonal tumors most often occurring in children under age 3 years. Most are due to a somatic change in tumor suppressor gene SMARCB1 followed by a second-hit, typically loss of heterozygosity, best detected on immunohistochemical staining. Despite the noteworthy genetic homogeneity of atypical teratoid rhabdoid tumors, relatively little is known about the oncogenic mechanisms that lead to biallelic inactivation of SMARCB1. Herein, we describe a patient with constitutional ring chromosome 22, Phelan-McDermid syndrome and atypical teratoid rhabdoid tumor of the brain. During mitosis, sister chromatids of a ring chromosome may form interlocking and dicentric rings, resulting in chromosomal loss, complex karyotypes, and ongoing somatic variation. We hypothesized that the inherent instability of the patient's ring chromosome could lead to mosaic monosomy chromosome 22, resulting in allelic inactivation of the tumor-suppressor gene SMARCB1 and AT/RT if a second-hit occurred. Utilizing high-density microarray technology to analyze peripheral blood and tumor tissue, we confirmed this oncogenic mechanism, previously undescribed in patients with atypical teratoid rhabdoid tumors. Our data demonstrate chromosomal loss as a consequence of ring chromosome instability serving as the first hit in oncogenesis. This rare but possibly under-recognized mechanism is important to note in children with ATRT and syndromic features. Further investigation is warranted to assess if this oncogenic mechanism has management and/or prognostic implications. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Heather M Byers
- Division of Medical Genetics, Department of Medicine, University of Washington, Seattle, Washington.,Division of Genetic Medicine, Seattle Children's Hospital, Seattle, Washington
| | - Margaret P Adam
- Division of Genetic Medicine, Seattle Children's Hospital, Seattle, Washington.,Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, Washington
| | - Amy LaCroix
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, Washington
| | - Sarah E S Leary
- Division of Oncology, Seattle Children's Hospital, Seattle, Washington
| | - Bonnie Cole
- Department of Laboratories, Seattle Children's Hospital, Seattle, Washington
| | - William B Dobyns
- Division of Genetic Medicine, Seattle Children's Hospital, Seattle, Washington.,Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, Washington.,Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, Washington.,Department of Neurology, University of Washington, Seattle, Washington
| | - Heather C Mefford
- Division of Genetic Medicine, Seattle Children's Hospital, Seattle, Washington.,Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, Washington
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15
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Mann PC, Cooper ME, Ryckman KK, Comas B, Gili J, Crumley S, Bream EN, Byers HM, Piester T, Schaefer A, Christine PJ, Lawrence A, Schaa KL, Kelsey KJ, Berends SK, Gadow E, Cosentino V, Castilla EE, Camelo JL, Saleme C, Day LJ, England SK, Marazita ML, Dagle JM, Murray JC, Murray JC. Polymorphisms in the fetal progesterone receptor and a calcium-activated potassium channel isoform are associated with preterm birth in an Argentinian population. J Perinatol 2013; 33:336-40. [PMID: 23018797 PMCID: PMC3719965 DOI: 10.1038/jp.2012.118] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [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: 01/01/2023]
Abstract
OBJECTIVE To investigate genetic etiologies of preterm birth (PTB) in Argentina through evaluation of single-nucleotide polymorphisms (SNPs) in candidate genes and population genetic admixture. STUDY DESIGN Genotyping was performed in 389 families. Maternal, paternal and fetal effects were studied separately. Mitochondrial DNA (mtDNA) was sequenced in 50 males and 50 females. Y-chromosome anthropological markers were evaluated in 50 males. RESULT Fetal association with PTB was found in the progesterone receptor (PGR, rs1942836; P=0.004). Maternal association with PTB was found in small conductance calcium activated potassium channel isoform 3 (KCNN3, rs883319; P=0.01). Gestational age associated with PTB in PGR rs1942836 at 32-36 weeks (P=0.0004). MtDNA sequencing determined 88 individuals had Amerindian consistent haplogroups. Two individuals had Amerindian Y-chromosome consistent haplotypes. CONCLUSION This study replicates single locus fetal associations with PTB in PGR, maternal association in KCNN3, and demonstrates possible effects for divergent racial admixture on PTB.
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Affiliation(s)
- Paul C. Mann
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, 52242
| | - Margaret E. Cooper
- Department of Oral Biology and Center for Craniofacial and Dental Genetics, Department of Human Genetics, University of Pittsburgh, Pittsburgh, Pennsylvania, 15219
| | - Kelli K. Ryckman
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, 52242
| | - Belén Comas
- Centro de Educación Médica e Investigaciones Clínicas, Buenos Aires, Capital Federal, Argentina,Instituto Nacional de Genética Médica Populacional and Estudio Colaborativo Latino Americano de Malformaciones Congénitas at Laboratório de Epidemiologia de Malformações Congênitas Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Juan Gili
- Centro de Educación Médica e Investigaciones Clínicas, Buenos Aires, Capital Federal, Argentina,Instituto Nacional de Genética Médica Populacional and Estudio Colaborativo Latino Americano de Malformaciones Congénitas at Laboratório de Epidemiologia de Malformações Congênitas Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Suzanne Crumley
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, 52242
| | - Elise N.A. Bream
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, 52242
| | - Heather M. Byers
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, 52242
| | - Travis Piester
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, 52242
| | - Amanda Schaefer
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, 52242
| | - Paul J. Christine
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, 52242
| | - Amy Lawrence
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, 52242
| | - Kendra L. Schaa
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, 52242
| | | | - Susan K. Berends
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, 52242
| | - Enrique Gadow
- Centro de Educación Médica e Investigaciones Clínicas, Buenos Aires, Capital Federal, Argentina
| | - Viviana Cosentino
- Centro de Educación Médica e Investigaciones Clínicas, Buenos Aires, Capital Federal, Argentina
| | - Eduardo E. Castilla
- Centro de Educación Médica e Investigaciones Clínicas, Buenos Aires, Capital Federal, Argentina,Instituto Nacional de Genética Médica Populacional and Estudio Colaborativo Latino Americano de Malformaciones Congénitas at Laboratório de Epidemiologia de Malformações Congênitas Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Jorge López Camelo
- Centro de Educación Médica e Investigaciones Clínicas, Buenos Aires, Capital Federal, Argentina,Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Capital Federal, Argentina,Instituto Multidisciplinario de Biología Celular, La Plata, Buenos Aires, Argentina
| | - Cesar Saleme
- Instituto de Maternidad y Ginecología Nuestra Señora de las Mercedes, San Miguel de Tucumán, Tucumán, Argentina
| | - Lori J. Day
- Department of Obstetrics and Gynecology, University of Iowa, Iowa City, Iowa, 52242
| | - Sarah K. England
- Department of Obstetrics and Gynecology, University of Iowa, Iowa City, Iowa, 52242,Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, Iowa, 52242
| | - Mary L. Marazita
- Department of Oral Biology and Center for Craniofacial and Dental Genetics, Department of Human Genetics, University of Pittsburgh, Pittsburgh, Pennsylvania, 15219
| | - John M. Dagle
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, 52242
| | - Jeffrey C. Murray
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, 52242,Corresponding Author: Jeffrey C. Murray, MD Professor, Departments of Pediatrics, Epidemiology, and Biological Sciences University of Iowa Carver College of Medicine 500 Newton Road, 2182 ML, Iowa City, IA 52242-1181 319-335-6897 phone; 319-335-6970 fax
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16
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Byers HM, Dagle JM, Klein JM, Ryckman KK, McDonald EL, Murray JC, Borowski KS. Variations in CRHR1 are associated with persistent pulmonary hypertension of the newborn. Pediatr Res 2012; 71:162-7. [PMID: 22258127 PMCID: PMC3718388 DOI: 10.1038/pr.2011.24] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [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] [Indexed: 11/09/2022]
Abstract
INTRODUCTION Persistent pulmonary hypertension of the newborn (PPHN) is associated with substantial infant morbidity and mortality. Recently, genetic associations have been found in idiopathic pulmonary arterial hypertension. RESULTS PPHN was significantly (P < 0.05) associated with genetic variants in corticotropin-releasing hormone (CRH) receptor 1, CRHR1 and CRH-binding protein, CRHBP. Association with CRHR1 rs4458044 passed the Bonferroni threshold for significance. No mutations were found in the bone morphogenetic protein receptor type II (BMPR2) gene. DISCUSSION We describe previously unreported genetic associations between PPHN and CRHR1 and CRHBP. These findings may have implications for further understanding the pathophysiology of PPHN and treatment. METHODS We performed a family-based candidate gene study to examine a genetic association with PPHN and sequenced the BMPR2 gene in 72 individuals. We enrolled 110 families with infants diagnosed with PPHN based on inclusion criteria. After medical chart review, 22 subjects were excluded based on predefined criteria, and DNA samples from 88 affected infants and at least one parent per infant were collected and genotyped. Thirty-two single-nucleotide polymorphisms in 12 genes involved in vasoconstriction/vasodilation, lung development, surfactant regulation, or vascular endothelial cell function were investigated using family-based association tests.
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Affiliation(s)
- Heather M Byers
- Department of Obstetrics and Gynecology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, 52242, United States
| | - John M Dagle
- Department of Pediatrics, Carver College of Medicine, University of Iowa, Iowa City, Iowa, 52242, United States
| | - Jonathan M Klein
- Department of Pediatrics, Carver College of Medicine, University of Iowa, Iowa City, Iowa, 52242, United States
| | - Kelli K Ryckman
- Department of Pediatrics, Carver College of Medicine, University of Iowa, Iowa City, Iowa, 52242, United States
| | - Erin L McDonald
- Department of Pediatrics, Carver College of Medicine, University of Iowa, Iowa City, Iowa, 52242, United States
| | - Jeffrey C Murray
- Department of Pediatrics, Carver College of Medicine, University of Iowa, Iowa City, Iowa, 52242, United States
| | - Kristi S Borowski
- Corresponding Author: Kristi S Borowski MD, 200 Hawkins Drive, University of Iowa, Iowa City, IA 52242, Phone: (319) 384.9319, FAX: (319) 384.8353,
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