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Brooks D, Burke E, Lee S, Eble TN, O'Leary M, Osei-Owusu I, Rehm HL, Dhar SU, Emrick L, Bick D, Nehrebecky M, Macnamara E, Casas-Alba D, Armstrong J, Prat C, Martínez-Monseny AF, Palau F, Liu P, Adams D, Lalani S, Rosenfeld JA, Burrage LC. Heterozygous MAP3K20 variants cause ectodermal dysplasia, craniosynostosis, sensorineural hearing loss, and limb anomalies. Hum Genet 2024; 143:279-291. [PMID: 38451290 DOI: 10.1007/s00439-024-02657-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 02/13/2024] [Indexed: 03/08/2024]
Abstract
Biallelic pathogenic variants in MAP3K20, which encodes a mitogen-activated protein kinase, are a rare cause of split-hand foot malformation (SHFM), hearing loss, and nail abnormalities or congenital myopathy. However, heterozygous variants in this gene have not been definitively associated with a phenotype. Here, we describe the phenotypic spectrum associated with heterozygous de novo variants in the linker region between the kinase domain and leucine zipper domain of MAP3K20. We report five individuals with diverse clinical features, including craniosynostosis, limb anomalies, sensorineural hearing loss, and ectodermal dysplasia-like phenotypes who have heterozygous de novo variants in this specific region of the gene. These individuals exhibit both shared and unique clinical manifestations, highlighting the complexity and variability of the disorder. We propose that the involvement of MAP3K20 in endothelial-mesenchymal transition provides a plausible etiology of these features. Together, these findings characterize a disorder that both expands the phenotypic spectrum associated with MAP3K20 and highlights the need for further studies on its role in early human development.
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Affiliation(s)
- Daniel Brooks
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Elizabeth Burke
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NIH and National Human Genome Research Institute, NIH, Bethesda, MD, USA
| | - Sukyeong Lee
- Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, Houston, TX, USA
- Advanced Technology Core for Macromolecular X-Ray Crystallography, Baylor College of Medicine, Houston, TX, USA
| | - Tanya N Eble
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Melanie O'Leary
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Ikeoluwa Osei-Owusu
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Heidi L Rehm
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Shweta U Dhar
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Lisa Emrick
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
- Department of Pediatrics, Section of Neurology and Developmental Neuroscience, Baylor College of Medicine, Houston, TX, USA
- Texas Children's Hospital, Houston, TX, USA
| | - David Bick
- Hudson Alpha Institute for Biotechnology, Huntsville, AL, USA
| | - Michelle Nehrebecky
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NIH and National Human Genome Research Institute, NIH, Bethesda, MD, USA
| | - Ellen Macnamara
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NIH and National Human Genome Research Institute, NIH, Bethesda, MD, USA
| | - Dídac Casas-Alba
- Department of Genetic Medicine, Pediatric Institute of Rare Diseases (IPER), CIBER on Rare Diseases (CIBERER), Hospital Sant Joan de DéuEsplugues de Llobregat, 08950, Barcelona, Spain
| | - Judith Armstrong
- Department of Genetic Medicine, Pediatric Institute of Rare Diseases (IPER), CIBER on Rare Diseases (CIBERER), Hospital Sant Joan de DéuEsplugues de Llobregat, 08950, Barcelona, Spain
| | - Carolina Prat
- Department of Dermatology, Hospital Sant Joan de Deu, Esplugues de Llobregat, 08950, Barcelona, Spain
| | - Antonio F Martínez-Monseny
- Department of Genetic Medicine, Pediatric Institute of Rare Diseases (IPER), CIBER on Rare Diseases (CIBERER), Hospital Sant Joan de DéuEsplugues de Llobregat, 08950, Barcelona, Spain
| | - Francesc Palau
- Department of Genetic Medicine, Pediatric Institute of Rare Diseases (IPER), CIBER on Rare Diseases (CIBERER), Hospital Sant Joan de DéuEsplugues de Llobregat, 08950, Barcelona, Spain
- Division of Pediatrics, University of Barcelona School of Medicine and Health Sciences, Barcelona, Spain
| | - Pengfei Liu
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
- Baylor Genetics, Houston, TX, USA
| | - David Adams
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NIH and National Human Genome Research Institute, NIH, Bethesda, MD, USA
| | - Seema Lalani
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
- Texas Children's Hospital, Houston, TX, USA
| | - Jill A Rosenfeld
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA.
| | - Lindsay C Burrage
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA.
- Texas Children's Hospital, Houston, TX, USA.
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2
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McDonald MF, Prather LL, Helfer CR, Ludmir EB, Echeverria AE, Yust-Katz S, Patel AJ, Deneen B, Rao G, Jalali A, Dhar SU, Amos CI, Mandel JJ. Prevalence of pathogenic germline variants in adult-type diffuse glioma. Neurooncol Pract 2023; 10:482-490. [PMID: 37720399 PMCID: PMC10502787 DOI: 10.1093/nop/npad033] [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] [Indexed: 09/19/2023] Open
Abstract
Background No consensus germline testing guidelines currently exist for glioma patients, so the prevalence of germline pathogenic variants remains unknown. This study aims to determine the prevalence and type of pathogenic germline variants in adult glioma. Methods A retrospective review at a single institution with paired tumor/normal sequencing from August 2018-April 2022 was performed and corresponding clinical data were collected. Results We identified 152 glioma patients of which 15 (9.8%) had pathogenic germline variants. Pathogenic germline variants were seen in 11/84 (13.1%) of Glioblastoma, IDH wild type; 3/42 (7.1%) of Astrocytoma, IDH mutant; and 1/26 (3.8%) of Oligodendroglioma, IDH mutant, and 1p/19q co-deleted patients. Pathogenic variants in BRCA2, MUTYH, and CHEK2 were most common (3/15, 20% each). BRCA1 variants occurred in 2/15 (13%) patients, with variants in NF1, ATM, MSH2, and MSH3 occurring in one patient (7%) each. Prior cancer diagnosis was found in 5/15 patients (33%). Second-hit somatic variants were seen in 3/15 patients (20%) in NF1, MUTYH, and MSH2. Referral to genetics was performed in 6/15 (40%) patients with pathogenic germline variants. 14/15 (93%) of patients discovered their pathogenic variant as a result of their paired glioma sequencing. Conclusions These findings suggest a possible overlooked opportunity for determination of hereditary cancer syndromes with impact on surveillance as well as potential broader treatment options. Further studies that can determine the role of variants in gliomagenesis and confirm the occurrence and types of pathogenic germline variants in patients with IDH wild type compared to IDH mutant tumors are necessary.
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Affiliation(s)
- Malcolm F McDonald
- Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA
- Medical Scientist Training Program, Baylor College of Medicine, Houston, Texas, USA
| | - Lyndsey L Prather
- Department of Neurology, Baylor College of Medicine, Houston, Texas, USA
| | - Cassandra R Helfer
- Department of Neurology, Baylor College of Medicine, Houston, Texas, USA
| | - Ethan B Ludmir
- Department of Radiation Oncology, MD Anderson Cancer Center, Houston, Texas, USA
| | - Alfredo E Echeverria
- Department of Radiation Oncology, Baylor College of Medicine, Houston, Texas, USA
| | | | - Akash J Patel
- Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA
- Department of Otolaryngology-Head and Neck Surgery, Baylor College of Medicine, Houston, Texas, USA
- Jan and Dan Duncan Neurological Research Institute, Texas Children’s Hospital, Houston, Texas, USA
| | - Benjamin Deneen
- Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA
| | - Ganesh Rao
- Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA
| | - Ali Jalali
- Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA
| | - Shweta U Dhar
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
- Department of Internal Medicine, Baylor College of Medicine, Houston, Texas, USA
| | - Chris I Amos
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Jacob J Mandel
- Department of Neurology, Baylor College of Medicine, Houston, Texas, USA
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3
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Srivastava S, Shaked HM, Gable K, Gupta SD, Pan X, Somashekarappa N, Han G, Mohassel P, Gotkine M, Doney E, Goldenberg P, Tan QKG, Gong Y, Kleinstiver B, Wishart B, Cope H, Pires CB, Stutzman H, Spillmann RC, Sadjadi R, Elpeleg O, Lee CH, Bellen HJ, Edvardson S, Eichler F, Dunn TM, Dai H, Dhar SU, Emrick LT, Goldman AM, Hanchard NA, Jamal F, Karaviti L, Lalani SR, Lee BH, Lewis RA, Marom R, Moretti PM, Murdock DR, Nicholas SK, Orengo JP, Posey JE, Potocki L, Rosenfeld JA, Samson SL, Scott DA, Tran AA, Vogel TP, Wangler MF, Yamamoto S, Eng CM, Liu P, Ward PA, Behrens E, Deardorff M, Falk M, Hassey K, Sullivan K, Vanderver A, Goldstein DB, Cope H, McConkie-Rosell A, Schoch K, Shashi V, Smith EC, Spillmann RC, Sullivan JA, Tan QKG, Walley NM, Agrawal PB, Beggs AH, Berry GT, Briere LC, Cobban LA, Coggins M, Cooper CM, Fieg EL, High F, Holm IA, Korrick S, Krier JB, Lincoln SA, Loscalzo J, Maas RL, MacRae CA, Pallais JC, Rao DA, Rodan LH, Silverman EK, Stoler JM, Sweetser DA, Walker M, Walsh CA, Esteves C, Kelley EG, Kohane IS, LeBlanc K, McCray AT, Nagy A, Dasari S, Lanpher BC, Lanza IR, Morava E, Oglesbee D, Bademci G, Barbouth D, Bivona S, Carrasquillo O, Chang TCP, Forghani I, Grajewski A, Isasi R, Lam B, Levitt R, Liu XZ, McCauley J, Sacco R, Saporta M, Schaechter J, Tekin M, Telischi F, Thorson W, Zuchner S, Colley HA, Dayal JG, Eckstein DJ, Findley LC, Krasnewich DM, Mamounas LA, Manolio TA, Mulvihill JJ, LaMoure GL, Goldrich MP, Urv TK, Doss AL, Acosta MT, Bonnenmann C, D’Souza P, Draper DD, Ferreira C, Godfrey RA, Groden CA, Macnamara EF, Maduro VV, Markello TC, Nath A, Novacic D, Pusey BN, Toro C, Wahl CE, Baker E, Burke EA, Adams DR, Gahl WA, Malicdan MCV, Tifft CJ, Wolfe LA, Yang J, Power B, Gochuico B, Huryn L, Latham L, Davis J, Mosbrook-Davis D, Rossignol F, Solomon B, MacDowall J, Thurm A, Zein W, Yousef M, Adam M, Amendola L, Bamshad M, Beck A, Bennett J, Berg-Rood B, Blue E, Boyd B, Byers P, Chanprasert S, Cunningham M, Dipple K, Doherty D, Earl D, Glass I, Golden-Grant K, Hahn S, Hing A, Hisama FM, Horike-Pyne M, Jarvik GP, Jarvik J, Jayadev S, Lam C, Maravilla K, Mefford H, Merritt JL, Mirzaa G, Nickerson D, Raskind W, Rosenwasser N, Scott CR, Sun A, Sybert V, Wallace S, Wener M, Wenger T, Ashley EA, Bejerano G, Bernstein JA, Bonner D, Coakley TR, Fernandez L, Fisher PG, Fresard L, Hom J, Huang Y, Kohler JN, Kravets E, Majcherska MM, Martin BA, Marwaha S, McCormack CE, Raja AN, Reuter CM, Ruzhnikov M, Sampson JB, Smith KS, Sutton S, Tabor HK, Tucker BM, Wheeler MT, Zastrow DB, Zhao C, Byrd WE, Crouse AB, Might M, Nakano-Okuno M, Whitlock J, Brown G, Butte MJ, Dell’Angelica EC, Dorrani N, Douine ED, Fogel BL, Gutierrez I, Huang A, Krakow D, Lee H, Loo SK, Mak BC, Martin MG, Martínez-Agosto JA, McGee E, Nelson SF, Nieves-Rodriguez S, Palmer CGS, Papp JC, Parker NH, Renteria G, Signer RH, Sinsheimer JS, Wan J, Wang LK, Perry KW, Woods JD, Alvey J, Andrews A, Bale J, Bohnsack J, Botto L, Carey J, Pace L, Longo N, Marth G, Moretti P, Quinlan A, Velinder M, Viskochi D, Bayrak-Toydemir P, Mao R, Westerfield M, Bican A, Brokamp E, Duncan L, Hamid R, Kennedy J, Kozuira M, Newman JH, PhillipsIII JA, Rives L, Robertson AK, Solem E, Cogan JD, Cole FS, Hayes N, Kiley D, Sisco K, Wambach J, Wegner D, Baldridge D, Pak S, Schedl T, Shin J, Solnica-Krezel L, Sadjadi R, Elpeleg O, Lee CH, Bellen HJ, Edvardson S, Eichler F, Dunn TM. SPTSSA variants alter sphingolipid synthesis and cause a complex hereditary spastic paraplegia. Brain 2023; 146:1420-1435. [PMID: 36718090 PMCID: PMC10319774 DOI: 10.1093/brain/awac460] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 11/03/2022] [Accepted: 11/19/2022] [Indexed: 02/01/2023] Open
Abstract
Sphingolipids are a diverse family of lipids with critical structural and signalling functions in the mammalian nervous system, where they are abundant in myelin membranes. Serine palmitoyltransferase, the enzyme that catalyses the rate-limiting reaction of sphingolipid synthesis, is composed of multiple subunits including an activating subunit, SPTSSA. Sphingolipids are both essential and cytotoxic and their synthesis must therefore be tightly regulated. Key to the homeostatic regulation are the ORMDL proteins that are bound to serine palmitoyltransferase and mediate feedback inhibition of enzymatic activity when sphingolipid levels become excessive. Exome sequencing identified potential disease-causing variants in SPTSSA in three children presenting with a complex form of hereditary spastic paraplegia. The effect of these variants on the catalytic activity and homeostatic regulation of serine palmitoyltransferase was investigated in human embryonic kidney cells, patient fibroblasts and Drosophila. Our results showed that two different pathogenic variants in SPTSSA caused a hereditary spastic paraplegia resulting in progressive motor disturbance with variable sensorineural hearing loss and language/cognitive dysfunction in three individuals. The variants in SPTSSA impaired the negative regulation of serine palmitoyltransferase by ORMDLs leading to excessive sphingolipid synthesis based on biochemical studies and in vivo studies in Drosophila. These findings support the pathogenicity of the SPTSSA variants and point to excessive sphingolipid synthesis due to impaired homeostatic regulation of serine palmitoyltransferase as responsible for defects in early brain development and function.
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Affiliation(s)
- Siddharth Srivastava
- Department of Neurology, Rosamund Stone Zander Translational Neuroscience Center, BostonChildren's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Hagar Mor Shaked
- Department of Genetics, Hadassah Medical Center and Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | - Kenneth Gable
- Department of Biochemistry and Molecular Biology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Sita D Gupta
- Department of Biochemistry and Molecular Biology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Xueyang Pan
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA.,Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX 77030, USA
| | - Niranjanakumari Somashekarappa
- Department of Biochemistry and Molecular Biology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Gongshe Han
- Department of Biochemistry and Molecular Biology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Payam Mohassel
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20814, USA
| | - Marc Gotkine
- Department of Genetics, Hadassah Medical Center and Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | | | - Paula Goldenberg
- Department of Pediatrics, Section on Medical Genetics, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Queenie K G Tan
- Department of Pediatrics, Division of Medical Genetics, Duke University School of Medicine, Durham, NC 27710, USA
| | - Yi Gong
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.,Center for Genomic Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Benjamin Kleinstiver
- Center for Genomic Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.,Department of Pathology, Massachusetts General Hospital, Boston, MA 02114, USA.,Department of Pathology, Harvard Medical School, Boston, MA 02115, USA
| | - Brian Wishart
- Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Heidi Cope
- Department of Pediatrics, Division of Medical Genetics, Duke University School of Medicine, Durham, NC 27710, USA
| | - Claudia Brito Pires
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.,Center for Genomic Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Hannah Stutzman
- Center for Genomic Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.,Department of Pathology, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Rebecca C Spillmann
- Department of Pediatrics, Division of Medical Genetics, Duke University School of Medicine, Durham, NC 27710, USA
| | | | - Reza Sadjadi
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Orly Elpeleg
- Department of Genetics, Hadassah Medical Center and Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | - Chia-Hsueh Lee
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Hugo J Bellen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA.,Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX 77030, USA
| | - Simon Edvardson
- Pediatric Neurology Unit, Hadassah University Hospital, Mount Scopus, Jerusalem 91240, Israel
| | - Florian Eichler
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.,Center for Genomic Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Teresa M Dunn
- Department of Biochemistry and Molecular Biology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
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- Department of Neurology, Massachusetts General Hospital, Harvard Medical School , Boston, MA 02114 , USA
| | - Orly Elpeleg
- Department of Genetics, Hadassah Medical Center and Faculty of Medicine, Hebrew University of Jerusalem , Jerusalem 91120 , Israel
| | - Chia-Hsueh Lee
- Department of Structural Biology, St. Jude Children’s Research Hospital , Memphis, TN 38105 , USA
| | - Hugo J Bellen
- Department of Molecular and Human Genetics, Baylor College of Medicine , Houston, TX 77030 , USA
- Jan and Dan Duncan Neurological Research Institute, Texas Children’s Hospital , Houston, TX 77030 , USA
| | - Simon Edvardson
- Pediatric Neurology Unit, Hadassah University Hospital, Mount Scopus , Jerusalem 91240 , Israel
| | - Florian Eichler
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School , Boston, MA 02114 , USA
- Center for Genomic Medicine, Massachusetts General Hospital, Harvard Medical School , Boston, MA 02114 , USA
| | - Teresa M Dunn
- Department of Biochemistry and Molecular Biology, Uniformed Services University of the Health Sciences , Bethesda, MD 20814 , USA
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Zhao S, Chen WJ, Kwok OM, Dhar SU, Eble TN, Tseng TS, Chen LS. Psychometric Properties of the POAGTS: A Tool for Understanding Parents' Perceptions Regarding Autism Spectrum Disorder Genetic Testing. Int J Environ Res Public Health 2021; 18:ijerph18063323. [PMID: 33807035 PMCID: PMC8004979 DOI: 10.3390/ijerph18063323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 03/14/2021] [Accepted: 03/15/2021] [Indexed: 12/03/2022]
Abstract
Due to the increased prevalence of Autism Spectrum Disorder (ASD), more children with ASD may be referred for genetic testing. It is important to develop a tool to help parents consider the benefits and drawbacks of genetic testing for ASD before pursuing genetic testing for children with ASD. We developed the first theory-based survey—Perceptions of ASD Genetic Testing Survey (POAGTS), as a tool to assist healthcare providers to better understand parents’ perceptions and concerns regarding ASD genetic testing. The psychometric properties of POAGTS were first pre-tested and then formally tested with 308 parents of children with ASD who had not decided whether to pursue genetic testing for their children diagnosed with ASD. Findings suggest that the eight scales of the POAGTS were psychometrically sound, and had acceptable data reliability and validity. Additional research with various samples, such as parents of children with ASD who belong to diverse racial/ethnic and socioeconomic groups, is warranted in the future to determine whether the POAGTS is applicable to these particular groups. Condensing and refining this tool to a shorter, more user-friendly version is also recommended for future research.
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Affiliation(s)
- Shixi Zhao
- Department of Health, Exercise & Sports Sciences, University of New Mexico, Albuquerque, NM 87131, USA;
| | - Wei-Ju Chen
- Department of Psychology, the University of Texas of the Permian Basin, Odessa, TX 79762, USA;
| | - Oi-Man Kwok
- Department of Educational Psychology, Texas A&M University, College Station, TX 77843, USA;
| | - Shweta U. Dhar
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; (S.U.D.); (T.N.E.)
| | - Tanya N. Eble
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; (S.U.D.); (T.N.E.)
| | - Tung-Sung Tseng
- Behavioral and Community Health Sciences Program, Louisiana State University Health Sciences Center School of Public Health, New Orleans, LA 70112, USA;
| | - Lei-Shih Chen
- Department of Health and Kinesiology, Texas A&M University, College Station, TX 77843, USA
- Correspondence:
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5
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Abstract
Background: Health educators (HEs), who are specialized in health education, can provide basic genomics education/services to the public. Such practice of HEs is unknown. We examined HEs' genomics knowledge and practice, intention, attitudes, self-efficacy and perceived barriers in providing basic genomics education/services. Materials & methods: Texas HEs (n = 662) were invited to complete the survey that was developed based on theoretical constructs (i.e., practice/behavior, intention, attitudes, self-efficacy, knowledge and perceived barriers) from various health behavior theories. Results: Among 182 HEs completed the survey, most had never/seldom provided basic genomics education/services. Participants' practice was positively associated with their intention in performing basic genomics education/services and previous genomics training. Intention to offer such education/services was positively related to HEs' self-efficacy and attitudes, which were correlated to previous genomics training. Conclusion: Texas HEs lacked basic genomics education/services practice. As previous genomics training was associated with HEs' practice, providing continuing education may enhance their practice.
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Affiliation(s)
- Lei-Shih Chen
- Department of Health & Kinesiology, Texas A&M University, College Station, Texas
| | - Shixi Zhao
- Department of Health, Exercise & Sports Sciences, University of New Mexico, Albuquerque, New Mexico
| | - Yu-Lyu Yeh
- Department of Health & Kinesiology, Texas A&M University, College Station, Texas
| | - Tanya N Eble
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Shweta U Dhar
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Oi-Man Kwok
- Department of Educational Psychology, Texas A&M University, College Station, Texas
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Zhao S, Chen WJ, Dhar SU, Eble TN, Kwok OM, Chen LS. Pursuing genetic testing for children with autism spectrum disorders: What do parents think? J Genet Couns 2020; 30:370-382. [PMID: 32985757 DOI: 10.1002/jgc4.1320] [Citation(s) in RCA: 4] [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: 11/07/2019] [Revised: 07/21/2020] [Accepted: 07/25/2020] [Indexed: 11/11/2022]
Abstract
The American Academy of Pediatrics, the American College of Medical Genetics and Genomics, and the American Academy of Neurology recommend genetic testing, as a genetic evaluation tool, for children diagnosed with autism spectrum disorders (ASD). Despite the potential benefits, the utilization of genetic testing is low. We proposed an integrated theoretical framework to examine parents' intention and associated psychosocial factors in pursuing genetic testing for their children with ASD. Recruiting primarily from the Interactive Autism Network, a nationwide sample of 411 parents of children with ASD who had never pursued genetic testing for their children completed our theory-based online survey. Data were analyzed using structural equation modeling. About half of the parents were willing to pursue genetic testing for their children with ASD. Findings of the structural equation modeling suggested a good model fit between our integrated theoretical framework and survey data. Parents' intention was significantly and positively associated with their attitudes toward genetic testing, subjective norm, and self-efficacy in having their children tested. This study serves as an initial window to understand parental intention to pursue genetic testing for their children with ASD. Our findings can help physicians and genetic counselors understand, educate, counsel, and support parents' decision-making about having their children with ASD genetically tested. Furthermore, our study can also assist physicians and genetic counselors in developing theory- and evidence-based patient education materials to enhance genetic testing knowledge among parents of children with ASD.
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Affiliation(s)
- Shixi Zhao
- Department of Health, Exercise & Sports Sciences, University of New Mexico, Albuquerque, New Mexico, USA
| | - Wei-Ju Chen
- Department of Psychology, The University of Texas of the Permian Basin, Odessa, Texas, USA
| | - Shweta U Dhar
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Tanya N Eble
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Oi-Man Kwok
- Department of Educational Psychology, Texas A&M University, College Station, Texas, USA
| | - Lei-Shih Chen
- Department of Health and Kinesiology, Texas A&M University, College Station, Texas, USA
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Erwin DJ, LaMaire C, Espana A, Eble TN, Dhar SU. Financial barriers in a county genetics clinic: Problems and solutions. J Genet Couns 2020; 29:678-688. [DOI: 10.1002/jgc4.1279] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 12/18/2019] [Accepted: 02/25/2020] [Indexed: 11/10/2022]
Affiliation(s)
| | - Christina LaMaire
- Department of Genetics and Genomic Sciences Icahn School of Medicine at Mount Sinai New York NY USA
| | - Alex Espana
- Department of Molecular & Human Genetics Baylor College of Medicine Houston TX USA
| | - Tanya N. Eble
- Department of Molecular & Human Genetics Baylor College of Medicine Houston TX USA
| | - Shweta U. Dhar
- Department of Molecular & Human Genetics Baylor College of Medicine Houston TX USA
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Mao D, Reuter CM, Ruzhnikov MR, Beck AE, Farrow EG, Emrick LT, Rosenfeld JA, Mackenzie KM, Robak L, Wheeler MT, Burrage LC, Jain M, Liu P, Calame D, Küry S, Sillesen M, Schmitz-Abe K, Tonduti D, Spaccini L, Iascone M, Genetti CA, Koenig MK, Graf M, Tran A, Alejandro M, Lee BH, Thiffault I, Agrawal PB, Bernstein JA, Bellen HJ, Chao HT, Acosta MT, Adam M, Adams DR, Agrawal PB, Alejandro ME, Allard P, Alvey J, Amendola L, Andrews A, Ashley EA, Azamian MS, Bacino CA, Bademci G, Baker E, Balasubramanyam A, Baldridge D, Bale J, Bamshad M, Barbouth D, Batzli GF, Bayrak-Toydemir P, Beck A, Beggs AH, Bejerano G, Bellen HJ, Bennet J, Berg-Rood B, Bernier R, Bernstein JA, Berry GT, Bican A, Bivona S, Blue E, Bohnsack J, Bonnenmann C, Bonner D, Botto L, Briere LC, Brokamp E, Burke EA, Burrage LC, Butte MJ, Byers P, Carey J, Carrasquillo O, Chang TCP, Chanprasert S, Chao HT, Clark GD, Coakley TR, Cobban LA, Cogan JD, Cole FS, Colley HA, Cooper CM, Cope H, Craigen WJ, Cunningham M, D’Souza P, Dai H, Dasari S, Davids M, Dayal JG, Dell’Angelica EC, Dhar SU, Dipple K, Doherty D, Dorrani N, Douine ED, Draper DD, Duncan L, Earl D, Eckstein DJ, Emrick LT, Eng CM, Esteves C, Estwick T, Fernandez L, Ferreira C, Fieg EL, Fisher PG, Fogel BL, Forghani I, Fresard L, Gahl WA, Glass I, Godfrey RA, Golden-Grant K, Goldman AM, Goldstein DB, Grajewski A, Groden CA, Gropman AL, Hahn S, Hamid R, Hanchard NA, Hayes N, High F, Hing A, Hisama FM, Holm IA, Hom J, Horike-Pyne M, Huang A, Huang Y, Isasi R, Jamal F, Jarvik GP, Jarvik J, Jayadev S, Jiang YH, Johnston JM, Karaviti L, Kelley EG, Kiley D, Kohane IS, Kohler JN, Krakow D, Krasnewich DM, Korrick S, Koziura M, Krier JB, Lalani SR, Lam B, Lam C, Lanpher BC, Lanza IR, Lau CC, LeBlanc K, Lee BH, Lee H, Levitt R, Lewis RA, Lincoln SA, Liu P, Liu XZ, Longo N, Loo SK, Loscalzo J, Maas RL, Macnamara EF, MacRae CA, Maduro VV, Majcherska MM, Malicdan MCV, Mamounas LA, Manolio TA, Mao R, Maravilla K, Markello TC, Marom R, Marth G, Martin BA, Martin MG, Martínez-Agosto JA, Marwaha S, McCauley J, McConkie-Rosell A, McCormack CE, McCray AT, Mefford H, Merritt JL, Might M, Mirzaa G, Morava-Kozicz E, Moretti PM, Morimoto M, Mulvihill JJ, Murdock DR, Nath A, Nelson SF, Newman JH, Nicholas SK, Nickerson D, Novacic D, Oglesbee D, Orengo JP, Pace L, Pak S, Pallais JC, Palmer CG, Papp JC, Parker NH, Phillips JA, Posey JE, Postlethwait JH, Potocki L, Pusey BN, Quinlan A, Raskind W, Raja AN, Renteria G, Reuter CM, Rives L, Robertson AK, Rodan LH, Rosenfeld JA, Rowley RK, Ruzhnikov M, Sacco R, Sampson JB, Samson SL, Saporta M, Scott CR, Schaechter J, Schedl T, Schoch K, Scott DA, Shakachite L, Sharma P, Shashi V, Shin J, Signer R, Sillari CH, Silverman EK, Sinsheimer JS, Sisco K, Smith KS, Solnica-Krezel L, Spillmann RC, Stoler JM, Stong N, Sullivan JA, Sun A, Sutton S, Sweetser DA, Sybert V, Tabor HK, Tamburro CP, Tan QKG, Tekin M, Telischi F, Thorson W, Tifft CJ, Toro C, Tran AA, Urv TK, Velinder M, Viskochil D, Vogel TP, Wahl CE, Wallace S, Walley NM, Walsh CA, Walker M, Wambach J, Wan J, Wang LK, Wangler MF, Ward PA, Wegner D, Wener M, Westerfield M, Wheeler MT, Wise AL, Wolfe LA, Woods JD, Yamamoto S, Yang J, Yoon AJ, Yu G, Zastrow DB, Zhao C, Zuchner S. De novo EIF2AK1 and EIF2AK2 Variants Are Associated with Developmental Delay, Leukoencephalopathy, and Neurologic Decompensation. Am J Hum Genet 2020; 106:570-583. [PMID: 32197074 PMCID: PMC7118694 DOI: 10.1016/j.ajhg.2020.02.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 02/28/2020] [Indexed: 02/03/2023] Open
Abstract
EIF2AK1 and EIF2AK2 encode members of the eukaryotic translation initiation factor 2 alpha kinase (EIF2AK) family that inhibits protein synthesis in response to physiologic stress conditions. EIF2AK2 is also involved in innate immune response and the regulation of signal transduction, apoptosis, cell proliferation, and differentiation. Despite these findings, human disorders associated with deleterious variants in EIF2AK1 and EIF2AK2 have not been reported. Here, we describe the identification of nine unrelated individuals with heterozygous de novo missense variants in EIF2AK1 (1/9) or EIF2AK2 (8/9). Features seen in these nine individuals include white matter alterations (9/9), developmental delay (9/9), impaired language (9/9), cognitive impairment (8/9), ataxia (6/9), dysarthria in probands with verbal ability (6/9), hypotonia (7/9), hypertonia (6/9), and involuntary movements (3/9). Individuals with EIF2AK2 variants also exhibit neurological regression in the setting of febrile illness or infection. We use mammalian cell lines and proband-derived fibroblasts to further confirm the pathogenicity of variants in these genes and found reduced kinase activity. EIF2AKs phosphorylate eukaryotic translation initiation factor 2 subunit 1 (EIF2S1, also known as EIF2α), which then inhibits EIF2B activity. Deleterious variants in genes encoding EIF2B proteins cause childhood ataxia with central nervous system hypomyelination/vanishing white matter (CACH/VWM), a leukodystrophy characterized by neurologic regression in the setting of febrile illness and other stressors. Our findings indicate that EIF2AK2 missense variants cause a neurodevelopmental syndrome that may share phenotypic and pathogenic mechanisms with CACH/VWM.
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Dai A, Wu LQ, Jacobs RC, Raghuram A, Dhar SU. Implementation of a Medical School Elective Course Incorporating Case-Based Learning: a Pilot Study. Med Sci Educ 2020; 30:339-344. [PMID: 34457676 PMCID: PMC8368533 DOI: 10.1007/s40670-019-00911-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
INTRODUCTION Case-based learning (CBL) is a pedagogical method using clinical case studies to reinforce learning topics. A pilot elective course incorporating CBL was offered for first-year medical students. The purpose of this study is to (1) describe the logistics of implementing the course and (2) evaluate its reception among medical students on its efficacy in learning basic science class material. METHOD An 8-week elective course was offered to medical students from 2012 to 2017. Specialists facilitated case discussions synthesizing material from didactic lectures with clinical scenarios. End-of-term surveys with multiple choice and free response questions were distributed to students and described using summary statistics. RESULTS There were 13 cohorts of enrollees, and the average number of students enrolled per cohort was 45.6, out of an average class size of 186 (24.5%, range 36-60). One hundred ninety-eight (64.2%) students reported that the course considerably changed or greatly expanded knowledge. Three hundred two (89.1%) students felt it met a majority of or exceeded expectations. Two hundred eighty-seven (80.2%) responses indicated interest in taking the course again or recommending it to others. One hundred six responses (27.1%) indicated preference for CBL over traditional lectures, and 177 (45.3%) were interested to see CBL integrated into the curriculum. CONCLUSIONS Overall, this CBL elective course was well-received and perceived as effective for better learning class material by students. Additionally, students were receptive to case-based learning and integrating this style of learning into a preclinical curriculum without entirely replacing didactic-based learning. These findings may encourage more medical schools to explore incorporating CBL in the curriculum.
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Affiliation(s)
- Annie Dai
- Office of Undergraduate Medical Education, Baylor College of Medicine, Houston, TX USA
| | - Laura Q. Wu
- Office of Undergraduate Medical Education, Baylor College of Medicine, Houston, TX USA
| | - Ryan C. Jacobs
- Office of Undergraduate Medical Education, Baylor College of Medicine, Houston, TX USA
| | - Anjali Raghuram
- Office of Undergraduate Medical Education, Baylor College of Medicine, Houston, TX USA
| | - Shweta U. Dhar
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, TX 77030 USA
- Department of Medicine, Baylor College of Medicine, Houston, TX USA
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10
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Zhao S, Chen WJ, Dhar SU, Eble TN, Kwok OM, Chen LS. Genetic Testing Experiences Among Parents of Children with Autism Spectrum Disorder in the United States. J Autism Dev Disord 2020; 49:4821-4833. [PMID: 31542846 DOI: 10.1007/s10803-019-04200-z] [Citation(s) in RCA: 10] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This study examined the experiences of Autism Spectrum Disorder (ASD) genetic testing among parents of children with ASD. A nationwide sample of 552 parents of children with ASD completed an online survey. Nearly one-quarter (22.5%) of the parents reported that their affected children had undergone ASD genetic testing. The testing utilization was associated with awareness of ASD genetic testing and whether information was received from healthcare providers. Among parents whose children with ASD were tested, 37.6% had negative experiences, which mainly due to lack of perceived testing benefits to their affected children and unpleasant testing experiences with healthcare providers. To provide better healthcare services, it is critical to ensure parents understand the purposes, benefits, and results of ASD genetic testing.
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Affiliation(s)
- Shixi Zhao
- Department of Health, Exercise & Sports Sciences, University of New Mexico, Albuquerque, NM, USA
| | - Wei-Ju Chen
- Department of Psychology, The University of Texas of the Permian Basin, Odessa, TX, USA
| | - Shweta U Dhar
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Tanya N Eble
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Oi-Man Kwok
- Department of Educational Psychology, Texas A&M University, College Station, TX, USA
| | - Lei-Shih Chen
- Department of Health and Kinesiology, Texas A&M University, College Station, TX, USA.
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11
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Guo H, Bettella E, Marcogliese PC, Zhao R, Andrews JC, Nowakowski TJ, Gillentine MA, Hoekzema K, Wang T, Wu H, Jangam S, Liu C, Ni H, Willemsen MH, van Bon BW, Rinne T, Stevens SJC, Kleefstra T, Brunner HG, Yntema HG, Long M, Zhao W, Hu Z, Colson C, Richard N, Schwartz CE, Romano C, Castiglia L, Bottitta M, Dhar SU, Erwin DJ, Emrick L, Keren B, Afenjar A, Zhu B, Bai B, Stankiewicz P, Herman K, Mercimek-Andrews S, Juusola J, Wilfert AB, Abou Jamra R, Büttner B, Mefford HC, Muir AM, Scheffer IE, Regan BM, Malone S, Gecz J, Cobben J, Weiss MM, Waisfisz Q, Bijlsma EK, Hoffer MJV, Ruivenkamp CAL, Sartori S, Xia F, Rosenfeld JA, Bernier RA, Wangler MF, Yamamoto S, Xia K, Stegmann APA, Bellen HJ, Murgia A, Eichler EE. Disruptive mutations in TANC2 define a neurodevelopmental syndrome associated with psychiatric disorders. Nat Commun 2019; 10:4679. [PMID: 31616000 PMCID: PMC6794285 DOI: 10.1038/s41467-019-12435-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [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: 11/16/2018] [Accepted: 08/19/2019] [Indexed: 12/31/2022] Open
Abstract
Postsynaptic density (PSD) proteins have been implicated in the pathophysiology of neurodevelopmental and psychiatric disorders. Here, we present detailed clinical and genetic data for 20 patients with likely gene-disrupting mutations in TANC2-whose protein product interacts with multiple PSD proteins. Pediatric patients with disruptive mutations present with autism, intellectual disability, and delayed language and motor development. In addition to a variable degree of epilepsy and facial dysmorphism, we observe a pattern of more complex psychiatric dysfunction or behavioral problems in adult probands or carrier parents. Although this observation requires replication to establish statistical significance, it also suggests that mutations in this gene are associated with a variety of neuropsychiatric disorders consistent with its postsynaptic function. We find that TANC2 is expressed broadly in the human developing brain, especially in excitatory neurons and glial cells, but shows a more restricted pattern in Drosophila glial cells where its disruption affects behavioral outcomes.
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Affiliation(s)
- Hui Guo
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, WA, 98195, USA
- Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, 410078, Changsha, Hunan, China
| | - Elisa Bettella
- Laboratory of Molecular Genetics of Neurodevelopment, Department of Women's and Children's Health, University of Padua, Via Giustiniani 3, 35128, Padua, Italy
- Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Corso Stati Uniti 4, 35129, Padua, Italy
| | - Paul C Marcogliese
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
- Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX, 77030, USA
| | - Rongjuan Zhao
- Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, 410078, Changsha, Hunan, China
| | - Jonathan C Andrews
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
- Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX, 77030, USA
| | - Tomasz J Nowakowski
- UCSF Department of Anatomy, University of California, San Francisco, San Francisco, CA, 94143, USA
- UCSF Department of Psychiatry, University of California, San Francisco, San Francisco, CA, 94143, USA
- UCSF Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA, 94158, USA
| | - Madelyn A Gillentine
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, WA, 98195, USA
| | - Kendra Hoekzema
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, WA, 98195, USA
| | - Tianyun Wang
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, WA, 98195, USA
- Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, 410078, Changsha, Hunan, China
| | - Huidan Wu
- Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, 410078, Changsha, Hunan, China
| | - Sharayu Jangam
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
- Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX, 77030, USA
| | - Cenying Liu
- Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, 410078, Changsha, Hunan, China
| | - Hailun Ni
- Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, 410078, Changsha, Hunan, China
| | - Marjolein H Willemsen
- Department of Human Genetics, Radboud University Medical Center, 6500 HB, Nijmegen, The Netherlands
- Department of Clinical Genetics, Maastricht University Medical Center, 6202 AZ, Maastricht, The Netherlands
| | - Bregje W van Bon
- Department of Human Genetics, Radboud University Medical Center, 6500 HB, Nijmegen, The Netherlands
| | - Tuula Rinne
- Department of Human Genetics, Radboud University Medical Center, 6500 HB, Nijmegen, The Netherlands
| | - Servi J C Stevens
- Department of Clinical Genetics, Maastricht University Medical Center, 6202 AZ, Maastricht, The Netherlands
| | - Tjitske Kleefstra
- Department of Human Genetics, Radboud University Medical Center, 6500 HB, Nijmegen, The Netherlands
| | - Han G Brunner
- Department of Human Genetics, Radboud University Medical Center, 6500 HB, Nijmegen, The Netherlands
- Department of Clinical Genetics, Maastricht University Medical Center, 6202 AZ, Maastricht, The Netherlands
| | - Helger G Yntema
- Department of Human Genetics, Radboud University Medical Center, 6500 HB, Nijmegen, The Netherlands
| | - Min Long
- Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, 410078, Changsha, Hunan, China
| | - Wenjing Zhao
- Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, 410078, Changsha, Hunan, China
| | - Zhengmao Hu
- Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, 410078, Changsha, Hunan, China
| | - Cindy Colson
- Normandie Univ, UNICAEN, CHU de Caen Normandie, Department of Genetics, EA7450 BioTARGen, 14000, Caen, France
| | - Nicolas Richard
- Normandie Univ, UNICAEN, CHU de Caen Normandie, Department of Genetics, EA7450 BioTARGen, 14000, Caen, France
| | | | | | | | | | - Shweta U Dhar
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Deanna J Erwin
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Lisa Emrick
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Boris Keren
- Département de génétique, Hôpital Pitié-Salpêtrière, Assistance Publique - Hôpitaux de Paris, 75013, Paris, France
| | - Alexandra Afenjar
- APHP, Centre de référence des malformations et maladies congénitales du cervelet Département de génétique et embryologie médicale, GRCn°19, pathologies Congénitales du Cervelet-LeucoDystrophies, AP-HP, Hôpital Armand Trousseau, F-75012, Paris, France
| | - Baosheng Zhu
- Department of Pediatrics, The First People's Hospital of Yunnan Province, 650032, Kunming, Yunnan, China
- Medical Faculty, Kunming University of Science and Technology, 650032, Kunming, Yunnan, China
| | - Bing Bai
- Department of Pediatrics, The First People's Hospital of Yunnan Province, 650032, Kunming, Yunnan, China
- Medical Faculty, Kunming University of Science and Technology, 650032, Kunming, Yunnan, China
| | - Pawel Stankiewicz
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Kristin Herman
- Section of Medical Genomics, Medical Investigation of Neurodevelopmental Disorders Institute, University of California, Davis, Sacramento, CA, 95817, USA
| | - Saadet Mercimek-Andrews
- Division of Clinical and Metabolic Genetics, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, ON, M5G 1X8, Canada
| | | | - Amy B Wilfert
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, WA, 98195, USA
| | - Rami Abou Jamra
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany
| | - Benjamin Büttner
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany
| | - Heather C Mefford
- Department of Pediatrics, Division of Genetic Medicine, University of Washington, Seattle, WA, 98195, USA
| | - Alison M Muir
- Department of Pediatrics, Division of Genetic Medicine, University of Washington, Seattle, WA, 98195, USA
| | - Ingrid E Scheffer
- Departments of Medicine and Paediatrics, The University of Melbourne, Austin Health and Royal Children's Hospital, Melbourne, VIC, 3084, Australia
| | - Brigid M Regan
- Departments of Medicine and Paediatrics, The University of Melbourne, Austin Health and Royal Children's Hospital, Melbourne, VIC, 3084, Australia
| | - Stephen Malone
- Department of Neurosciences, Queensland Children's Hospital, Brisbane, QLD, 4101, Australia
| | - Jozef Gecz
- School of Medicine and the Robinson Research Institute, The University of Adelaide at the Women's and Children's Hospital, Adelaide, SA, 5006, Australia
| | - Jan Cobben
- Emma Children's Hospital AUMC, 1105 AZ, Amsterdam, The Netherlands
- North West Thames Genetics Service NHS, London, UK
| | - Marjan M Weiss
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Clinical Genetics, Amsterdam, Netherlands
| | - Quinten Waisfisz
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Clinical Genetics, Amsterdam, Netherlands
| | - Emilia K Bijlsma
- Department of Clinical Genetics, Leiden University Medical Center, 2333 ZA, Leiden, The Netherlands
| | - Mariëtte J V Hoffer
- Department of Clinical Genetics, Leiden University Medical Center, 2333 ZA, Leiden, The Netherlands
| | - Claudia A L Ruivenkamp
- Department of Clinical Genetics, Leiden University Medical Center, 2333 ZA, Leiden, The Netherlands
| | - Stefano Sartori
- Paediatric Neurology and Neurophysiology Unit, Department of Women's and Children's Health, University Hospital of Padua, 35128, Padua, Italy
| | - Fan Xia
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Jill A Rosenfeld
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Raphael A Bernier
- Department of Psychiatry, University of Washington, Seattle, WA, 98195, USA
| | - Michael F Wangler
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
- Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX, 77030, USA
- Program in Developmental Biology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Shinya Yamamoto
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
- Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX, 77030, USA
- Program in Developmental Biology, Baylor College of Medicine, Houston, TX, 77030, USA
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Kun Xia
- Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, 410078, Changsha, Hunan, China
- Hunan Key Laboratory of Animal Models for Human Diseases, 410078, Changsha, Hunan, China
| | - Alexander P A Stegmann
- Department of Human Genetics, Radboud University Medical Center, 6500 HB, Nijmegen, The Netherlands
- Department of Clinical Genetics, Maastricht University Medical Center, 6202 AZ, Maastricht, The Netherlands
| | - Hugo J Bellen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
- Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX, 77030, USA
- Program in Developmental Biology, Baylor College of Medicine, Houston, TX, 77030, USA
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, 77030, USA
- Howard Hughes Medical Institute, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Alessandra Murgia
- Laboratory of Molecular Genetics of Neurodevelopment, Department of Women's and Children's Health, University of Padua, Via Giustiniani 3, 35128, Padua, Italy.
| | - Evan E Eichler
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, WA, 98195, USA.
- Howard Hughes Medical Institute, University of Washington, Seattle, WA, 98195, USA.
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12
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Zhao S, Chen WJ, Dhar SU, Eble TN, Kwok OM, Chen LS. Needs assessment in genetic testing education: A survey of parents of children with autism spectrum disorder in the united states. Autism Res 2019; 12:1162-1170. [PMID: 31165588 DOI: 10.1002/aur.2152] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Accepted: 05/20/2019] [Indexed: 12/24/2022]
Abstract
Understanding parents' educational needs concerning genetic testing for their children with autism spectrum disorder (ASD) is important in developing tailored, evidence-based health education materials for clinical use. Since research is lacking in this area, to bridge the gap, we examined genetic testing education needs using a nationwide sample of parents of biological children with ASD in the United States. Prospective participants were recruited from the interactive autism network, and 552 parents of biological children with ASD completed the online survey. Most participants (73.7%) were interested in receiving health education about genetic testing. Yet, the majority of them (64.7%) reported that they did not receive the information needed from physicians. Parents who identified as racial/ethnic minorities (P = 0.029), who had an education degree below college (P = 0.002), or displayed low/no awareness of genetic testing (P = 0.003) were more interested in receiving health education regarding genetic testing. Parents' most desired topics for health education include the accuracy of genetic testing (88.4%), cost (85.9%), relevant benefits of such testing (83.8%), testing procedure (77.8%), eligibility to undergo genetic testing for their children with ASD (62.4%), potential harms caused by genetic testing (56.1%), previous use and experience among individuals affected by ASD (50.8%), and confidentiality issues (48.0%). Furthermore, web-based education was the preferable approach (85.4%). Our findings can help develop health education programs and/or materials regarding genetic testing for parents and physicians to facilitate better physician-parent communication and assist parents in making informed medical decisions regarding genetic testing. Autism Res 2019, 12: 1162-1170. © 2019 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: This study examined educational needs on genetic testing among 552 American parents of children with autism spectrum disorder (ASD). Results showed that most parents expressed interests in receiving health education regarding genetic testing (73.7%) and favored online education resources (85.4%). Preferred topics included accuracy, cost, and testing benefits. Our findings can help develop genetic testing related health education programs and materials for parents of children with ASD.
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Affiliation(s)
- Shixi Zhao
- Department of Health and Kinesiology, Texas A&M University, College Station, Texas
| | - Wei-Ju Chen
- Department of Health and Kinesiology, Texas A&M University, College Station, Texas
| | - Shweta U Dhar
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Tanya N Eble
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Oi-Man Kwok
- Department of Educational Psychology, Texas A&M University, College Station, Texas
| | - Lei-Shih Chen
- Department of Health and Kinesiology, Texas A&M University, College Station, Texas
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13
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Assia Batzir N, Bhagwat PK, Eble TN, Liu P, Eng CM, Elsea SH, Robak LA, Scaglia F, Goldman AM, Dhar SU, Wangler MF. De novo missense variant in the GTPase effector domain (GED) of DNM1L leads to static encephalopathy and seizures. Cold Spring Harb Mol Case Stud 2019; 5:a003673. [PMID: 30850373 PMCID: PMC6549558 DOI: 10.1101/mcs.a003673] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [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: 11/13/2018] [Accepted: 02/12/2019] [Indexed: 02/06/2023] Open
Abstract
DNM1L encodes a GTPase of the dynamin superfamily, which plays a crucial role in mitochondrial and peroxisomal fission. Pathogenic variants affecting the middle domain and the GTPase domain of DNM1L have been implicated in encephalopathy because of defective mitochondrial and peroxisomal fission 1 (EMPF1, MIM #614388). Patients show variable phenotypes ranging from severe hypotonia leading to death in the neonatal period to developmental delay/regression, with or without seizures. Familial pathogenic variants in the GTPase domain have also been associated with isolated optic atrophy. We present a 27-yr-old woman with static encephalopathy, a history of seizures, and nystagmus, in whom a novel de novo heterozygous variant was detected in the GTPase effector domain (GED) of DNM1L (c.2072A>G, p.Tyr691Cys). Functional studies in Drosophila demonstrate large, abnormally distributed peroxisomes and mitochondria, an effect very similar to that of middle domain missense alleles observed in pediatric subjects with EMPF1. To our knowledge, not only is this the first report of a disease-causing variant in the GED domain in humans, but this is also the oldest living individual reported with EMPF1. Longitudinal data of this kind helps to expand our knowledge of the natural history of a growing list of DNM1L-related disorders.
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Affiliation(s)
- Nurit Assia Batzir
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Pranjali K Bhagwat
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA
- Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, Texas 77030, USA
| | - Tanya N Eble
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Pengfei Liu
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA
- Baylor Genetics, Houston, Texas 77021, USA
| | - Christine M Eng
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA
- Baylor Genetics, Houston, Texas 77021, USA
- Texas Children's Hospital, Houston, Texas 77030, USA
| | - Sarah H Elsea
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA
- Baylor Genetics, Houston, Texas 77021, USA
| | - Laurie A Robak
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA
- Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, Texas 77030, USA
- Texas Children's Hospital, Houston, Texas 77030, USA
| | - Fernando Scaglia
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA
- Texas Children's Hospital, Houston, Texas 77030, USA
- BCM-CUHK Center of Medical Genetics, Prince of Wales Hospital, ShaTin, New Territories, Hong Kong, SAR
| | - Alica M Goldman
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Shweta U Dhar
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA
- Department of Medicine, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Michael F Wangler
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA
- Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, Texas 77030, USA
- Texas Children's Hospital, Houston, Texas 77030, USA
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14
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Machol K, Rousseau J, Ehresmann S, Garcia T, Nguyen TTM, Spillmann RC, Sullivan JA, Shashi V, Jiang YH, Stong N, Fiala E, Willing M, Pfundt R, Kleefstra T, Cho MT, McLaughlin H, Rosello Piera M, Orellana C, Martínez F, Caro-Llopis A, Monfort S, Roscioli T, Nixon CY, Buckley MF, Turner A, Jones WD, van Hasselt PM, Hofstede FC, van Gassen KL, Brooks AS, van Slegtenhorst MA, Lachlan K, Sebastian J, Madan-Khetarpal S, Sonal D, Sakkubai N, Thevenon J, Faivre L, Maurel A, Petrovski S, Krantz ID, Tarpinian JM, Rosenfeld JA, Lee BH, Campeau PM, Adams DR, Alejandro ME, Allard P, Azamian MS, Bacino CA, Balasubramanyam A, Barseghyan H, Batzli GF, Beggs AH, Behnam B, Bican A, Bick DP, Birch CL, Bonner D, Boone BE, Bostwick BL, Briere LC, Brown DM, Brush M, Burke EA, Burrage LC, Chen S, Clark GD, Coakley TR, Cogan JD, Cooper CM, Cope H, Craigen WJ, D’Souza P, Davids M, Dayal JG, Dell’Angelica EC, Dhar SU, Dillon A, Dipple KM, Donnell-Fink LA, Dorrani N, Dorset DC, Douine ED, Draper DD, Eckstein DJ, Emrick LT, Eng CM, Eskin A, Esteves C, Estwick T, Ferreira C, Fogel BL, Friedman ND, Gahl WA, Glanton E, Godfrey RA, Goldstein DB, Gould SE, Gourdine JPF, Groden CA, Gropman AL, Haendel M, Hamid R, Hanchard NA, Handley LH, Herzog MR, Holm IA, Hom J, Howerton EM, Huang Y, Jacob HJ, Jain M, Jiang YH, Johnston JM, Jones AL, Kohane IS, Krasnewich DM, Krieg EL, Krier JB, Lalani SR, Lau CC, Lazar J, Lee BH, Lee H, Levy SE, Lewis RA, Lincoln SA, Lipson A, Loo SK, Loscalzo J, Maas RL, Macnamara EF, MacRae CA, Maduro VV, Majcherska MM, Malicdan MCV, Mamounas LA, Manolio TA, Markello TC, Marom R, Martínez-Agosto JA, Marwaha S, May T, McConkie-Rosell A, McCormack CE, McCray AT, Might M, Moretti PM, Morimoto M, Mulvihill JJ, Murphy JL, Muzny DM, Nehrebecky ME, Nelson SF, Newberry JS, Newman JH, Nicholas SK, Novacic D, Orange JS, Pallais JC, Palmer CG, Papp JC, Parker NH, Pena LD, Phillips JA, Posey JE, Postlethwait JH, Potocki L, Pusey BN, Reuter CM, Robertson AK, Rodan LH, Rosenfeld JA, Sampson JB, Samson SL, Schoch K, Schroeder MC, Scott DA, Sharma P, Shashi V, Signer R, Silverman EK, Sinsheimer JS, Smith KS, Spillmann RC, Splinter K, Stoler JM, Stong N, Sullivan JA, Sweetser DA, Tifft CJ, Toro C, Tran AA, Urv TK, Valivullah ZM, Vilain E, Vogel TP, Wahl CE, Walley NM, Walsh CA, Ward PA, Waters KM, Westerfield M, Wise AL, Wolfe LA, Worthey EA, Yamamoto S, Yang Y, Yu G, Zastrow DB, Zheng A. Expanding the Spectrum of BAF-Related Disorders: De Novo Variants in SMARCC2 Cause a Syndrome with Intellectual Disability and Developmental Delay. Am J Hum Genet 2019; 104:164-178. [PMID: 30580808 DOI: 10.1016/j.ajhg.2018.11.007] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 11/14/2018] [Indexed: 12/22/2022] Open
Abstract
SMARCC2 (BAF170) is one of the invariable core subunits of the ATP-dependent chromatin remodeling BAF (BRG1-associated factor) complex and plays a crucial role in embryogenesis and corticogenesis. Pathogenic variants in genes encoding other components of the BAF complex have been associated with intellectual disability syndromes. Despite its significant biological role, variants in SMARCC2 have not been directly associated with human disease previously. Using whole-exome sequencing and a web-based gene-matching program, we identified 15 individuals with variable degrees of neurodevelopmental delay and growth retardation harboring one of 13 heterozygous variants in SMARCC2, most of them novel and proven de novo. The clinical presentation overlaps with intellectual disability syndromes associated with other BAF subunits, such as Coffin-Siris and Nicolaides-Baraitser syndromes and includes prominent speech impairment, hypotonia, feeding difficulties, behavioral abnormalities, and dysmorphic features such as hypertrichosis, thick eyebrows, thin upper lip vermilion, and upturned nose. Nine out of the fifteen individuals harbor variants in the highly conserved SMARCC2 DNA-interacting domains (SANT and SWIRM) and present with a more severe phenotype. Two of these individuals present cardiac abnormalities. Transcriptomic analysis of fibroblasts from affected individuals highlights a group of differentially expressed genes with possible roles in regulation of neuronal development and function, namely H19, SCRG1, RELN, and CACNB4. Our findings suggest a novel SMARCC2-related syndrome that overlaps with neurodevelopmental disorders associated with variants in BAF-complex subunits.
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15
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Prakash P, Eble TN, Dhar SU. Quality improvement of clinic flow for complex genetic conditions: Using Ehlers-Danlos syndrome as a model. Mol Genet Genomic Med 2018; 6:993-1000. [PMID: 30259710 PMCID: PMC6305640 DOI: 10.1002/mgg3.472] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Revised: 08/14/2018] [Accepted: 08/21/2018] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Genetic providers face the challenge of having adequate time to conduct a comprehensive evaluation. Hypermobile Ehlers-Danlos (hEDS) syndrome has a complex array of symptoms. An initial visit can involve approximately 60-80 min and an additional 45 min for the check-in and checkout process. We propose a model to improve clinic flow and patient satisfaction by using: (a) pre-appointment questionnaire (b) disease information sheet outlining basic management and (c) itinerary detailing the visit. METHODS New patients were given a questionnaire, an EDS information sheet, and a visit itinerary. In the end, a patient satisfaction survey was administered containing 18 questions pertaining to their satisfaction with the questionnaire, the information sheet, and their overall visit. Completed surveys were turned in to the front desk to maintain anonymity. RESULTS Based on the survey results, patient satisfaction toward the implementation of a questionnaire was overwhelmingly positive. Survey responders found that the itinerary was added to their understanding of the appointment process and that the hEDS information sheets were helpful, understandable, and appropriate in length. Respondents said that they strongly agreed or agreed with the following statements: (a) I was satisfied with the visit; (b) I now have a better understanding of my condition; (c) This visit was successful in addressing my most pressing concerns; and (d) I would recommend this clinic to others. CONCLUSION Designing a disease-centered model that implements patient-centered resources improves patient understanding and satisfaction for new hEDS patient visits. This model can be emulated in diagnosis and management of other complex genetic and nongenetic conditions.
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Affiliation(s)
- Preeti Prakash
- Office of BCM Students, Baylor College of Medicine, Houston, Texas
| | - Tanya N Eble
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Shweta U Dhar
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas.,Department of Internal Medicine, Baylor College of Medicine, Houston, Texas
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16
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Marcogliese PC, Shashi V, Spillmann RC, Stong N, Rosenfeld JA, Koenig MK, Martínez-Agosto JA, Herzog M, Chen AH, Dickson PI, Lin HJ, Vera MU, Salamon N, Graham JM, Ortiz D, Infante E, Steyaert W, Dermaut B, Poppe B, Chung HL, Zuo Z, Lee PT, Kanca O, Xia F, Yang Y, Smith EC, Jasien J, Kansagra S, Spiridigliozzi G, El-Dairi M, Lark R, Riley K, Koeberl DD, Golden-Grant K, Yamamoto S, Wangler MF, Mirzaa G, Hemelsoet D, Lee B, Nelson SF, Goldstein DB, Bellen HJ, Pena LD, Callens S, Coucke P, Dermaut B, Hemelsoet D, Poppe B, Steyaert W, Terryn W, Van Coster R, Adams DR, Alejandro ME, Allard P, Azamian MS, Bacino CA, Balasubramanyam A, Barseghyan H, Batzli GF, Beggs AH, Behnam B, Bican A, Bick DP, Birch CL, Bonner D, Boone BE, Bostwick BL, Briere LC, Brown DM, Brush M, Burke EA, Burrage LC, Chen S, Clark GD, Coakley TR, Cogan JD, Cooper CM, Cope H, Craigen WJ, D’Souza P, Davids M, Dayal JG, Dell’Angelica EC, Dhar SU, Dillon A, Dipple KM, Donnell-Fink LA, Dorrani N, Dorset DC, Douine ED, Draper DD, Eckstein DJ, Emrick LT, Eng CM, Eskin A, Esteves C, Estwick T, Ferreira C, Fogel BL, Friedman ND, Gahl WA, Glanton E, Godfrey RA, Goldstein DB, Gould SE, Gourdine JPF, Groden CA, Gropman AL, Haendel M, Hamid R, Hanchard NA, Handley LH, Herzog MR, Holm IA, Hom J, Howerton EM, Huang Y, Jacob HJ, Jain M, Jiang YH, Johnston JM, Jones AL, Kohane IS, Krasnewich DM, Krieg EL, Krier JB, Lalani SR, Lau CC, Lazar J, Lee BH, Lee H, Levy SE, Lewis RA, Lincoln SA, Lipson A, Loo SK, Loscalzo J, Maas RL, Macnamara EF, MacRae CA, Maduro VV, Majcherska MM, Malicdan MCV, Mamounas LA, Manolio TA, Markello TC, Marom R, Martínez-Agosto JA, Marwaha S, May T, McConkie-Rosell A, McCormack CE, McCray AT, Might M, Moretti PM, Morimoto M, Mulvihill JJ, Murphy JL, Muzny DM, Nehrebecky ME, Nelson SF, Newberry JS, Newman JH, Nicholas SK, Novacic D, Orange JS, Pallais JC, Palmer CG, Papp JC, Parker NH, Pena LD, Phillips JA, Posey JE, Postlethwait JH, Potocki L, Pusey BN, Reuter CM, Robertson AK, Rodan LH, Rosenfeld JA, Sampson JB, Samson SL, Schoch K, Schroeder MC, Scott DA, Sharma P, Shashi V, Signer R, Silverman EK, Sinsheimer JS, Smith KS, Spillmann RC, Splinter K, Stoler JM, Stong N, Sullivan JA, Sweetser DA, Tifft CJ, Toro C, Tran AA, Urv TK, Valivullah ZM, Vilain E, Vogel TP, Wahl CE, Walley NM, Walsh CA, Ward PA, Waters KM, Westerfield M, Wise AL, Wolfe LA, Worthey EA, Yamamoto S, Yang Y, Yu G, Zastrow DB, Zheng A. IRF2BPL Is Associated with Neurological Phenotypes. Am J Hum Genet 2018; 103:456. [PMID: 30193138 PMCID: PMC6128320 DOI: 10.1016/j.ajhg.2018.08.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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17
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Machol K, Jankovic J, Vijayakumar D, Burrage LC, Jain M, Lewis RA, Fuller GN, Xu M, Penas-Prado M, Gule-Monroe MK, Rosenfeld JA, Chen R, Eng CM, Yang Y, Lee BH, Moretti PM, Dhar SU. Atypical Alexander disease with dystonia, retinopathy, and a brain mass mimicking astrocytoma. Neurol Genet 2018; 4:e248. [PMID: 30046660 PMCID: PMC6055357 DOI: 10.1212/nxg.0000000000000248] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 05/14/2018] [Indexed: 11/29/2022]
Affiliation(s)
- Keren Machol
- Department of Molecular and Human Genetics (K.M., L.C.B., M.J., R.A.L., M.X., J.A.R., R.C., C.M.E., Y.Y., B.H.L., P.M.M., S.U.D.), Department of Neurology (J.J., D.V., P.M.M), and Department of Ophthalmology (R.A.L.), Baylor College of Medicine; Department of Pathology (G.N.F.), Department of Neuro-Oncology (M.P.-P.), and Department of Diagnostic Imaging (M.K.G.-M.), The University of Texas MD Anderson Cancer Center; Michael E. DeBakey VA Medical Center (P.M.M.); Baylor Genetics (C.M.E., Y.Y.); and Department of Medicine (S.U.D.), Baylor College of Medicine, Houston, TX
| | - Joseph Jankovic
- Department of Molecular and Human Genetics (K.M., L.C.B., M.J., R.A.L., M.X., J.A.R., R.C., C.M.E., Y.Y., B.H.L., P.M.M., S.U.D.), Department of Neurology (J.J., D.V., P.M.M), and Department of Ophthalmology (R.A.L.), Baylor College of Medicine; Department of Pathology (G.N.F.), Department of Neuro-Oncology (M.P.-P.), and Department of Diagnostic Imaging (M.K.G.-M.), The University of Texas MD Anderson Cancer Center; Michael E. DeBakey VA Medical Center (P.M.M.); Baylor Genetics (C.M.E., Y.Y.); and Department of Medicine (S.U.D.), Baylor College of Medicine, Houston, TX
| | - Dhanya Vijayakumar
- Department of Molecular and Human Genetics (K.M., L.C.B., M.J., R.A.L., M.X., J.A.R., R.C., C.M.E., Y.Y., B.H.L., P.M.M., S.U.D.), Department of Neurology (J.J., D.V., P.M.M), and Department of Ophthalmology (R.A.L.), Baylor College of Medicine; Department of Pathology (G.N.F.), Department of Neuro-Oncology (M.P.-P.), and Department of Diagnostic Imaging (M.K.G.-M.), The University of Texas MD Anderson Cancer Center; Michael E. DeBakey VA Medical Center (P.M.M.); Baylor Genetics (C.M.E., Y.Y.); and Department of Medicine (S.U.D.), Baylor College of Medicine, Houston, TX
| | - Lindsay C Burrage
- Department of Molecular and Human Genetics (K.M., L.C.B., M.J., R.A.L., M.X., J.A.R., R.C., C.M.E., Y.Y., B.H.L., P.M.M., S.U.D.), Department of Neurology (J.J., D.V., P.M.M), and Department of Ophthalmology (R.A.L.), Baylor College of Medicine; Department of Pathology (G.N.F.), Department of Neuro-Oncology (M.P.-P.), and Department of Diagnostic Imaging (M.K.G.-M.), The University of Texas MD Anderson Cancer Center; Michael E. DeBakey VA Medical Center (P.M.M.); Baylor Genetics (C.M.E., Y.Y.); and Department of Medicine (S.U.D.), Baylor College of Medicine, Houston, TX
| | - Mahim Jain
- Department of Molecular and Human Genetics (K.M., L.C.B., M.J., R.A.L., M.X., J.A.R., R.C., C.M.E., Y.Y., B.H.L., P.M.M., S.U.D.), Department of Neurology (J.J., D.V., P.M.M), and Department of Ophthalmology (R.A.L.), Baylor College of Medicine; Department of Pathology (G.N.F.), Department of Neuro-Oncology (M.P.-P.), and Department of Diagnostic Imaging (M.K.G.-M.), The University of Texas MD Anderson Cancer Center; Michael E. DeBakey VA Medical Center (P.M.M.); Baylor Genetics (C.M.E., Y.Y.); and Department of Medicine (S.U.D.), Baylor College of Medicine, Houston, TX
| | - Richard A Lewis
- Department of Molecular and Human Genetics (K.M., L.C.B., M.J., R.A.L., M.X., J.A.R., R.C., C.M.E., Y.Y., B.H.L., P.M.M., S.U.D.), Department of Neurology (J.J., D.V., P.M.M), and Department of Ophthalmology (R.A.L.), Baylor College of Medicine; Department of Pathology (G.N.F.), Department of Neuro-Oncology (M.P.-P.), and Department of Diagnostic Imaging (M.K.G.-M.), The University of Texas MD Anderson Cancer Center; Michael E. DeBakey VA Medical Center (P.M.M.); Baylor Genetics (C.M.E., Y.Y.); and Department of Medicine (S.U.D.), Baylor College of Medicine, Houston, TX
| | - Gregory N Fuller
- Department of Molecular and Human Genetics (K.M., L.C.B., M.J., R.A.L., M.X., J.A.R., R.C., C.M.E., Y.Y., B.H.L., P.M.M., S.U.D.), Department of Neurology (J.J., D.V., P.M.M), and Department of Ophthalmology (R.A.L.), Baylor College of Medicine; Department of Pathology (G.N.F.), Department of Neuro-Oncology (M.P.-P.), and Department of Diagnostic Imaging (M.K.G.-M.), The University of Texas MD Anderson Cancer Center; Michael E. DeBakey VA Medical Center (P.M.M.); Baylor Genetics (C.M.E., Y.Y.); and Department of Medicine (S.U.D.), Baylor College of Medicine, Houston, TX
| | - Mingchu Xu
- Department of Molecular and Human Genetics (K.M., L.C.B., M.J., R.A.L., M.X., J.A.R., R.C., C.M.E., Y.Y., B.H.L., P.M.M., S.U.D.), Department of Neurology (J.J., D.V., P.M.M), and Department of Ophthalmology (R.A.L.), Baylor College of Medicine; Department of Pathology (G.N.F.), Department of Neuro-Oncology (M.P.-P.), and Department of Diagnostic Imaging (M.K.G.-M.), The University of Texas MD Anderson Cancer Center; Michael E. DeBakey VA Medical Center (P.M.M.); Baylor Genetics (C.M.E., Y.Y.); and Department of Medicine (S.U.D.), Baylor College of Medicine, Houston, TX
| | - Marta Penas-Prado
- Department of Molecular and Human Genetics (K.M., L.C.B., M.J., R.A.L., M.X., J.A.R., R.C., C.M.E., Y.Y., B.H.L., P.M.M., S.U.D.), Department of Neurology (J.J., D.V., P.M.M), and Department of Ophthalmology (R.A.L.), Baylor College of Medicine; Department of Pathology (G.N.F.), Department of Neuro-Oncology (M.P.-P.), and Department of Diagnostic Imaging (M.K.G.-M.), The University of Texas MD Anderson Cancer Center; Michael E. DeBakey VA Medical Center (P.M.M.); Baylor Genetics (C.M.E., Y.Y.); and Department of Medicine (S.U.D.), Baylor College of Medicine, Houston, TX
| | - Maria K Gule-Monroe
- Department of Molecular and Human Genetics (K.M., L.C.B., M.J., R.A.L., M.X., J.A.R., R.C., C.M.E., Y.Y., B.H.L., P.M.M., S.U.D.), Department of Neurology (J.J., D.V., P.M.M), and Department of Ophthalmology (R.A.L.), Baylor College of Medicine; Department of Pathology (G.N.F.), Department of Neuro-Oncology (M.P.-P.), and Department of Diagnostic Imaging (M.K.G.-M.), The University of Texas MD Anderson Cancer Center; Michael E. DeBakey VA Medical Center (P.M.M.); Baylor Genetics (C.M.E., Y.Y.); and Department of Medicine (S.U.D.), Baylor College of Medicine, Houston, TX
| | - Jill A Rosenfeld
- Department of Molecular and Human Genetics (K.M., L.C.B., M.J., R.A.L., M.X., J.A.R., R.C., C.M.E., Y.Y., B.H.L., P.M.M., S.U.D.), Department of Neurology (J.J., D.V., P.M.M), and Department of Ophthalmology (R.A.L.), Baylor College of Medicine; Department of Pathology (G.N.F.), Department of Neuro-Oncology (M.P.-P.), and Department of Diagnostic Imaging (M.K.G.-M.), The University of Texas MD Anderson Cancer Center; Michael E. DeBakey VA Medical Center (P.M.M.); Baylor Genetics (C.M.E., Y.Y.); and Department of Medicine (S.U.D.), Baylor College of Medicine, Houston, TX
| | - Rui Chen
- Department of Molecular and Human Genetics (K.M., L.C.B., M.J., R.A.L., M.X., J.A.R., R.C., C.M.E., Y.Y., B.H.L., P.M.M., S.U.D.), Department of Neurology (J.J., D.V., P.M.M), and Department of Ophthalmology (R.A.L.), Baylor College of Medicine; Department of Pathology (G.N.F.), Department of Neuro-Oncology (M.P.-P.), and Department of Diagnostic Imaging (M.K.G.-M.), The University of Texas MD Anderson Cancer Center; Michael E. DeBakey VA Medical Center (P.M.M.); Baylor Genetics (C.M.E., Y.Y.); and Department of Medicine (S.U.D.), Baylor College of Medicine, Houston, TX
| | - Christine M Eng
- Department of Molecular and Human Genetics (K.M., L.C.B., M.J., R.A.L., M.X., J.A.R., R.C., C.M.E., Y.Y., B.H.L., P.M.M., S.U.D.), Department of Neurology (J.J., D.V., P.M.M), and Department of Ophthalmology (R.A.L.), Baylor College of Medicine; Department of Pathology (G.N.F.), Department of Neuro-Oncology (M.P.-P.), and Department of Diagnostic Imaging (M.K.G.-M.), The University of Texas MD Anderson Cancer Center; Michael E. DeBakey VA Medical Center (P.M.M.); Baylor Genetics (C.M.E., Y.Y.); and Department of Medicine (S.U.D.), Baylor College of Medicine, Houston, TX
| | - Yaping Yang
- Department of Molecular and Human Genetics (K.M., L.C.B., M.J., R.A.L., M.X., J.A.R., R.C., C.M.E., Y.Y., B.H.L., P.M.M., S.U.D.), Department of Neurology (J.J., D.V., P.M.M), and Department of Ophthalmology (R.A.L.), Baylor College of Medicine; Department of Pathology (G.N.F.), Department of Neuro-Oncology (M.P.-P.), and Department of Diagnostic Imaging (M.K.G.-M.), The University of Texas MD Anderson Cancer Center; Michael E. DeBakey VA Medical Center (P.M.M.); Baylor Genetics (C.M.E., Y.Y.); and Department of Medicine (S.U.D.), Baylor College of Medicine, Houston, TX
| | - Brendan H Lee
- Department of Molecular and Human Genetics (K.M., L.C.B., M.J., R.A.L., M.X., J.A.R., R.C., C.M.E., Y.Y., B.H.L., P.M.M., S.U.D.), Department of Neurology (J.J., D.V., P.M.M), and Department of Ophthalmology (R.A.L.), Baylor College of Medicine; Department of Pathology (G.N.F.), Department of Neuro-Oncology (M.P.-P.), and Department of Diagnostic Imaging (M.K.G.-M.), The University of Texas MD Anderson Cancer Center; Michael E. DeBakey VA Medical Center (P.M.M.); Baylor Genetics (C.M.E., Y.Y.); and Department of Medicine (S.U.D.), Baylor College of Medicine, Houston, TX
| | - Paolo M Moretti
- Department of Molecular and Human Genetics (K.M., L.C.B., M.J., R.A.L., M.X., J.A.R., R.C., C.M.E., Y.Y., B.H.L., P.M.M., S.U.D.), Department of Neurology (J.J., D.V., P.M.M), and Department of Ophthalmology (R.A.L.), Baylor College of Medicine; Department of Pathology (G.N.F.), Department of Neuro-Oncology (M.P.-P.), and Department of Diagnostic Imaging (M.K.G.-M.), The University of Texas MD Anderson Cancer Center; Michael E. DeBakey VA Medical Center (P.M.M.); Baylor Genetics (C.M.E., Y.Y.); and Department of Medicine (S.U.D.), Baylor College of Medicine, Houston, TX
| | - Shweta U Dhar
- Department of Molecular and Human Genetics (K.M., L.C.B., M.J., R.A.L., M.X., J.A.R., R.C., C.M.E., Y.Y., B.H.L., P.M.M., S.U.D.), Department of Neurology (J.J., D.V., P.M.M), and Department of Ophthalmology (R.A.L.), Baylor College of Medicine; Department of Pathology (G.N.F.), Department of Neuro-Oncology (M.P.-P.), and Department of Diagnostic Imaging (M.K.G.-M.), The University of Texas MD Anderson Cancer Center; Michael E. DeBakey VA Medical Center (P.M.M.); Baylor Genetics (C.M.E., Y.Y.); and Department of Medicine (S.U.D.), Baylor College of Medicine, Houston, TX
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Chen LS, Zhao S, Stelzig D, Dhar SU, Eble T, Yeh YC, Kwok OM. Development and evaluation of a genomics training program for community health workers in Texas. Genet Med 2018; 20:1030-1037. [DOI: 10.1038/gim.2017.236] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 11/17/2017] [Indexed: 01/26/2023] Open
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Chao HT, Davids M, Burke E, Pappas JG, Rosenfeld JA, McCarty AJ, Davis T, Wolfe L, Toro C, Tifft C, Xia F, Stong N, Johnson TK, Warr CG, Yamamoto S, Adams DR, Markello TC, Gahl WA, Bellen HJ, Wangler MF, Malicdan MCV, Adams DR, Adams CJ, Alejandro ME, Allard P, Ashley EA, Bacino CA, Balasubramanyam A, Barseghyan H, Beggs AH, Bellen HJ, Bernstein JA, Bick DP, Birch CL, Boone BE, Briere LC, Brown DM, Brush M, Burrage LC, Chao KR, Clark GD, Cogan JD, Cooper CM, Craigen WJ, Davids M, Dayal JG, Dell'Angelica EC, Dhar SU, Dipple KM, Donnell-Fink LA, Dorrani N, Dorset DC, Draper DD, Dries AM, Eckstein DJ, Emrick LT, Eng CM, Esteves C, Estwick T, Fisher PG, Frisby TS, Frost K, Gahl WA, Gartner V, Godfrey RA, Goheen M, Golas GA, Goldstein DB, Gordon M“GG, Gould SE, Gourdine JPF, Graham BH, Groden CA, Gropman AL, Hackbarth ME, Haendel M, Hamid R, Hanchard NA, Handley LH, Hardee I, Herzog MR, Holm IA, Howerton EM, Jacob HJ, Jain M, Jiang YH, Johnston JM, Jones AL, Koehler AE, Koeller DM, Kohane IS, Kohler JN, Krasnewich DM, Krieg EL, Krier JB, Kyle JE, Lalani SR, Latham L, Latour YL, Lau CC, Lazar J, Lee BH, Lee H, Lee PR, Levy SE, Levy DJ, Lewis RA, Liebendorder AP, Lincoln SA, Loomis CR, Loscalzo J, Maas RL, Macnamara EF, MacRae CA, Maduro VV, Malicdan MCV, Mamounas LA, Manolio TA, Markello TC, Mashid AS, Mazur P, McCarty AJ, McConkie-Rosell A, McCray AT, Metz TO, Might M, Moretti PM, Mulvihill JJ, Murphy JL, Muzny DM, Nehrebecky ME, Nelson SF, Newberry JS, Newman JH, Nicholas SK, Novacic D, Orange JS, Pallais JC, Palmer CG, Papp JC, Pena LD, Phillips JA, Posey JE, Postlethwait JH, Potocki L, Pusey BN, Ramoni RB, Rodan LH, Sadozai S, Schaffer KE, Schoch K, Schroeder MC, Scott DA, Sharma P, Shashi V, Silverman EK, Sinsheimer JS, Soldatos AG, Spillmann RC, Splinter K, Stoler JM, Stong N, Strong KA, Sullivan JA, Sweetser DA, Thomas SP, Tift CJ, Tolman NJ, Toro C, Tran AA, Valivullah ZM, Vilain E, Waggott DM, Wahl CE, Walley NM, Walsh CA, Wangler MF, Warburton M, Ward PA, Waters KM, Webb-Robertson BJM, Weech AA, Westerfield M, Wheeler MT, Wise AL, Worthe LA, Worthey EA, Yamamoto S, Yang Y, Yu G, Zornio PA. A Syndromic Neurodevelopmental Disorder Caused by De Novo Variants in EBF3. Am J Hum Genet 2017; 100:128-137. [PMID: 28017372 PMCID: PMC5223093 DOI: 10.1016/j.ajhg.2016.11.018] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 11/21/2016] [Indexed: 02/06/2023] Open
Abstract
Early B cell factor 3 (EBF3) is a member of the highly evolutionarily conserved Collier/Olf/EBF (COE) family of transcription factors. Prior studies on invertebrate and vertebrate animals have shown that EBF3 homologs are essential for survival and that loss-of-function mutations are associated with a range of nervous system developmental defects, including perturbation of neuronal development and migration. Interestingly, aristaless-related homeobox (ARX), a homeobox-containing transcription factor critical for the regulation of nervous system development, transcriptionally represses EBF3 expression. However, human neurodevelopmental disorders related to EBF3 have not been reported. Here, we describe three individuals who are affected by global developmental delay, intellectual disability, and expressive speech disorder and carry de novo variants in EBF3. Associated features seen in these individuals include congenital hypotonia, structural CNS malformations, ataxia, and genitourinary abnormalities. The de novo variants affect a single conserved residue in a zinc finger motif crucial for DNA binding and are deleterious in a fly model. Our findings indicate that mutations in EBF3 cause a genetic neurodevelopmental syndrome and suggest that loss of EBF3 function might mediate a subset of neurologic phenotypes shared by ARX-related disorders, including intellectual disability, abnormal genitalia, and structural CNS malformations.
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Shashi V, Pena LD, Kim K, Burton B, Hempel M, Schoch K, Walkiewicz M, McLaughlin HM, Cho M, Stong N, Hickey SE, Shuss CM, Freemark MS, Bellet JS, Keels MA, Bonner MJ, El-Dairi M, Butler M, Kranz PG, Stumpel CT, Klinkenberg S, Oberndorff K, Alawi M, Santer R, Petrovski S, Kuismin O, Korpi-Heikkilä S, Pietilainen O, Aarno P, Kurki MI, Hoischen A, Need AC, Goldstein DB, Kortüm F, Bacino A, Lee BH, Balasubramanyam A, Burrage LC, Clark GD, Craigen WJ, Dhar SU, Emrick LT, Graham BH, Jain M, Lalani SR, Lewis RA, Moretti PM, Nicholas SK, Orange JS, Posey JE, Potocki L, Rosenfeld JA, Scott DA, Hanchard NA, Alyssa TA, Mercedes AE, Mashid AS, Bellen HJ, Yamamoto S, Wangler MF, Westerfield M, Postlethwait JH, Eng CM, Yang Y, Muzny DM, Ward PA, Ramoni RB, McCray AT, Kohane IS, Holm IA, Might M, Mazur P, Splinter K, Esteves C, Shashi V, Jiang YH, Pena LD, McConkie-Rosell A, Schoch K, Spillmann RC, Sullivan JA, Walley NM, Goldstein DB, Stong N, Beggs AH, Loscalzo J, MacRae CA, Silverman EK, Stoler JM, Sweetser DA, Maas RL, Krier JB, Rodan LH, Walsh CA, Cooper CM, Pallais JC, Donnell-Fink LA, Krieg EL, Lincoln SA, Briere LC, Jacob HJ, Worthey EA, Lazar J, Strong KA, Handley LH, Newberry JS, Bick DP, Schroeder MC, Brown DM, Birch CL, Levy SE, Boone BE, Dorset DC, Jones AL, Manolio TA, Mulvihill JJ, Wise AL, Dayal JG, Eckstein DJ, Krasnewich DM, Loomis CR, Mamounas LA, Iglesias B, Martin C, Koeller DM, Metz TO, Ashley EA, Fisher PG, Bernstein JA, Wheeler MT, Zornio PA, Waggott DM, Dries AM, Kohler JN, Dipple KM, Nelson SF, Palmer CG, Vilain E, Allard P, Dell Angelica EC, Lee H, Sinsheimer JS, Papp JC, Dorrani N, Herzog MR, Barseghyan H, Adams DR, Adams CJ, Burke EA, Chao KR, Davids M, Draper DD, Estwick T, Frisby TS, Frost K, Gahl WA, Gartner V, Godfrey RA, Goheen M, Golas GA, Gordon MG, Groden CA, Gropman AL, Hackbarth ME, Hardee I, Johnston JM, Koehler AE, Latham L, Latour YL, Lau CYC, Lee PR, Levy DJ, Liebendorder AP, Macnamara EF, Maduro VV, Malicdan MV, Markello TC, McCarty AJ, Murphy JL, Nehrebecky ME, Novacic D, Pusey BN, Sadozai S, Schaffer KE, Sharma P, Soldatos AG, Thomas SP, Tifft CJ, Tolman NJ, Toro C, Valivullah ZM, Wahl CE, Warburton M, Weech AA, Wolfe LA, Yu G, Hamid R, Newman JH, Phillips JA, Cogan JD. De Novo Truncating Variants in ASXL2 Are Associated with a Unique and Recognizable Clinical Phenotype. Am J Hum Genet 2016; 99:991-999. [PMID: 27693232 PMCID: PMC5065681 DOI: 10.1016/j.ajhg.2016.08.017] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Accepted: 08/24/2016] [Indexed: 12/14/2022] Open
Abstract
The ASXL genes (ASXL1, ASXL2, and ASXL3) participate in body patterning during embryogenesis and encode proteins involved in epigenetic regulation and assembly of transcription factors to specific genomic loci. Germline de novo truncating variants in ASXL1 and ASXL3 have been respectively implicated in causing Bohring-Opitz and Bainbridge-Ropers syndromes, which result in overlapping features of severe intellectual disability and dysmorphic features. ASXL2 has not yet been associated with a human Mendelian disorder. In this study, we performed whole-exome sequencing in six unrelated probands with developmental delay, macrocephaly, and dysmorphic features. All six had de novo truncating variants in ASXL2. A careful review enabled the recognition of a specific phenotype consisting of macrocephaly, prominent eyes, arched eyebrows, hypertelorism, a glabellar nevus flammeus, neonatal feeding difficulties, hypotonia, and developmental disabilities. Although overlapping features with Bohring-Opitz and Bainbridge-Ropers syndromes exist, features that distinguish the ASXL2-associated condition from ASXL1- and ASXL3-related disorders are macrocephaly, absence of growth retardation, and more variability in the degree of intellectual disabilities. We were also able to demonstrate with mRNA studies that these variants are likely to exert a dominant-negative effect, given that both alleles are expressed in blood and the mutated ASXL2 transcripts escape nonsense-mediated decay. In conclusion, de novo truncating variants in ASXL2 underlie a neurodevelopmental syndrome with a clinically recognizable phenotype. This report expands the germline disorders that are linked to the ASXL genes.
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Li M, Amuta A, Xu L, Dhar SU, Talwar D, Jung E, Chen LS. Autism genetic testing information needs among parents of affected children: A qualitative study. Patient Educ Couns 2016; 99:1011-1016. [PMID: 26847420 DOI: 10.1016/j.pec.2015.12.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 12/03/2015] [Accepted: 12/10/2015] [Indexed: 06/05/2023]
Abstract
OBJECTIVE Leading health agencies recommend physicians to provide information regarding genetic testing for autism spectrum disorders (ASD) to parents of affected children. How to effectively provide this information, however, is unclear for physicians. This qualitative study examined the information needs regarding ASD genetic testing among parents of affected children. METHODS Semi-structured, in-depth interviews were conducted with 42 parents who had at least one child with ASD. Content analysis was utilized to analyze the interview data. RESULTS The majority of parents (83%) reported they had never received information regarding ASD genetic testing from their doctors. Nevertheless, most parents (86%) expressed an interest to learn about this information. Their preferred topics included: cost (60%), benefits (48%), accuracy (38%), test procedure (29%), potential physical harms from the test (29%), confidentiality (12%), previous utilization by other affected families (2%), and eligibility criteria for this genetic testing (2%). Moreover, parents mentioned various methods to facilitate their learning, including Web-based approaches (43%), workshops/seminars (36%), brochures and flyers (31%), and videos (10%). CONCLUSION To promote parental informed decision-making regarding ASD genetic testing, educational materials should be developed based on our findings. PRACTICE IMPLICATIONS Application of these needs assessment findings will subsequently improve the delivery of healthcare services.
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Affiliation(s)
- Ming Li
- Texas A&M University, Department of Health and Kinesiology, College Station, USA
| | - Ann Amuta
- Texas Woman's University, College of Health Sciences, Denton, USA
| | - Lei Xu
- East Carolina University, Department of Health Education and Promotion, Greenville, USA
| | - Shweta U Dhar
- Baylor College of Medicine, Department of Molecular & Human Genetics, Houston, USA
| | - Divya Talwar
- Texas A&M University, Department of Health and Kinesiology, College Station, USA
| | - Eunju Jung
- Indiana University, Department of Curriculum and Instruction, Bloomington, USA
| | - Lei-Shih Chen
- Texas A&M University, Department of Health and Kinesiology, College Station, USA.
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Chen LS, Xu L, Dhar SU, Li M, Talwar D, Jung E. Autism spectrum disorders: a qualitative study of attitudes toward prenatal genetic testing and termination decisions of affected pregnancies. Clin Genet 2014; 88:122-8. [PMID: 25251361 DOI: 10.1111/cge.12504] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [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: 04/30/2014] [Revised: 09/15/2014] [Accepted: 09/17/2014] [Indexed: 12/25/2022]
Abstract
In the United States, prenatal genetic testing (PGT) for Autism Spectrum Disorders (ASD) is currently available via clinical genetic services. Such testing may inform parents about their unborn child's risk for ASD, prepare parents for the birth of an affected infant, and allow them to arrange for early interventions. Although PGT for autism has potential benefits, the associated ethical, legal, and social implications (ELSI) should be considered. This first qualitative study employed a hypothetical scenario to explore the attitudes toward PGT and termination decisions of 42 parents of children with ASD. Over half of the participants expressed willingness to undergo PGT for autism. Reasons included better preparation for birth, early and better treatment, termination of affected pregnancy, contribution to research, and curiosity. Of the 31 parents who were either willing or unsure about undergoing the PGT, approximately three-fourths would continue their hypothetical affected pregnancies. Explanations included preparation for birth of the child, bonding or acceptance of existing ASD-affected children, apprehensions about test limitations, and religious concerns. Parents who reported they would terminate the affected pregnancy in this hypothetical situation were primarily Asians. This study contributes to the growing understanding of the ELSI aspects of PGT in clinical practice.
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Affiliation(s)
- L S Chen
- Department of Health and Kinesiology, Texas A&M University, College Station, TX, USA
| | - L Xu
- Department of Health Education and Promotion, East Carolina University, Greenville, NC, USA
| | - S U Dhar
- Department of Health Education and Promotion, East Carolina University, Greenville, NC, USA
| | - M Li
- Department of Health and Kinesiology, Texas A&M University, College Station, TX, USA
| | - D Talwar
- Department of Health and Kinesiology, Texas A&M University, College Station, TX, USA
| | - E Jung
- Department of Health and Kinesiology, Texas A&M University, College Station, TX, USA.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
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Chen LS, Li C, Wang CH, Amuta A, Li M, Huang TY, Dhar SU, Talwar D, Jung E. Autism spectrum disorders: perceptions of genetic etiology and recurrence risk among Taiwanese parents of affected children. Clin Genet 2014; 88:129-34. [PMID: 25267333 DOI: 10.1111/cge.12514] [Citation(s) in RCA: 13] [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: 07/21/2014] [Revised: 09/11/2014] [Accepted: 09/26/2014] [Indexed: 11/29/2022]
Abstract
In Taiwan, autism spectrum disorders (ASDs) are an emerging public health concern. The ongoing scientific progress for understanding the genetic etiology of ASD makes it increasingly important to examine how parents of children with ASD perceive the causes and recurrence risk of having another child with ASD. These perceptions may influence their family planning, attitudes toward genetic services, and willingness to take their children for ASD genetic testing. However, previous studies addressing this issue were conducted primarily in Western countries. As culture might shape an individual's views of genetic/genomic disorders, this first-of-its-kind study examined the perceptions of the genetic etiology for ASD and the recurrence risk among Taiwanese parents of children affected with ASD. In-depth, semi-structured interviews were conducted among 39 parents having at least one child with ASD. Although the majority of participants believed that ASD has a genetic link, less than half perceived genetic factors as the cause of their own child's ASD. Moreover, most participants articulated their recurrence risk incorrectly. Some parents were concerned about their doctors' limited genomic competencies. To provide parents with better education, counseling, and support for making reproductive decisions, ASD-related genomic education among Taiwanese physicians is needed.
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Affiliation(s)
- L S Chen
- Department of Health and Kinesiology, Texas A&M University, College Station, TX, USA
| | - C Li
- Department of Foreign Languages, WeiFang Medical University, Shandong, China
| | - C H Wang
- Department of Special Education, National HsinChu University of Education, HsinChu, Taiwan
| | - A Amuta
- Department of Health and Kinesiology, Texas A&M University, College Station, TX, USA
| | - M Li
- Department of Health and Kinesiology, Texas A&M University, College Station, TX, USA
| | - T Y Huang
- Department of Special Education, National HsinChu University of Education, HsinChu, Taiwan
| | - S U Dhar
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - D Talwar
- Department of Health and Kinesiology, Texas A&M University, College Station, TX, USA
| | - E Jung
- Department of Health and Kinesiology, Texas A&M University, College Station, TX, USA
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Mehta S, Dhar SU, Birnbaum Y. Common iliac artery aneurysm and spontaneous dissection with contralateral iatrogenic common iliac artery dissection in classic ehlers-danlos syndrome. Int J Angiol 2013; 21:167-70. [PMID: 23997563 DOI: 10.1055/s-0032-1325118] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Abstract
We describe a 43-year-old man who developed a spontaneous dissection of a right iliac artery aneurysm after performing vigorous physical exercise. Additionally, during peripheral intervention, the patient developed iatrogenic dissection of the left iliac artery. The patient had the characteristic physical findings of Ehlers-Danlos syndrome (EDS), classic type. Genetic testing revealed a mutation in the COL5A1 gene associated with EDS, classic type. Vascular aneurysms and dissections are characteristics of EDS vascular type, but not the classic type. Only one previous case with EDS, classic type with spontaneous iliac artery dissection has been described.
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Affiliation(s)
- Sachin Mehta
- Division of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, Texas
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Eble TN, Nagamani SCS, Franco LM, Plon SE, Blazo M, Dhar SU. The practice of adult genetics: a 7-year experience from a single center. Am J Med Genet A 2012; 161A:89-93. [PMID: 23239603 DOI: 10.1002/ajmg.a.35684] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Accepted: 08/24/2012] [Indexed: 01/22/2023]
Abstract
The purpose of our study is to familiarize the reader with genetic disorders commonly seen in adults and identify challenges and barriers that limit provision of services. We conducted a retrospective chart analysis of patients seen in the adult Genetics clinics from January 2004 to December 2010 in a metropolitan medical center consisting of an academic private clinic and a county hospital clinic. During the study period, a total of 1,552 patients (n = 1,108 private clinic patients; n = 444 county clinic patients) were evaluated and managed. Of these, 790 and 280 were new patient visits at the private clinic and county clinic, respectively. Approximately 35% (374/1,070) of new patients were seen for cancer-related indications, while neurological indications accounted for approximately 14% (153/1,070) in both clinics. Cardiology-related indications accounted for approximately 13% (145/1,070) of patients, followed closely by chromosomal and syndromic indications for which almost 9% (96/1,070) of new patients were seen. Approximately 8% (90/1,070) of new patients were seen for musculoskeletal indications. We saw increased clinic growth during the study period and found that the most common indications for referral are: (1) Personal/family history of cancer (2) neurological (3) cardiovascular (CV) (4) chromosomal/syndromic and (5) musculoskeletal. A number of challenges were identified, including coordination of services, feasibility of testing, and an overall higher complexity of care with increased clinic scheduling time requirements. Through this review, we demonstrate the demand for adult genetics services and propose some guidelines to address the challenges of management in the adult genetics patient population.
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Affiliation(s)
- Tanya N Eble
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
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Bacino CA, Dhar SU, Brunetti-Pierri N, Lee B, Bonnen PE. WDR35 mutation in siblings with Sensenbrenner syndrome: a ciliopathy with variable phenotype. Am J Med Genet A 2012; 158A:2917-24. [PMID: 22987818 DOI: 10.1002/ajmg.a.35608] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Accepted: 07/16/2012] [Indexed: 11/11/2022]
Abstract
Sensenbrenner syndrome and unclassified short rib-polydactyly conditions are ciliopathies with overlapping phenotypes and genetic heterogeneity. Mutations in WDR35 were identified recently in a sub-group of patients with Sensenbrenner syndrome and in a single family that presented with an unclassified form of short-rib polydactyly (SRP) syndrome. We report on siblings with an unusual combination of phenotypes: narrow thorax, short stature, minor anomalies, developmental delay, and severe hepatic fibrosis leading to liver failure and early death in two of the children. Both parents were unaffected suggesting autosomal recessive inheritance. The family and their affected children were followed over a decade. Exome sequencing was performed in one affected individual. It showed a homozygous missense mutation in a highly conserved position of the WDR35 gene. This family represents a WDR35-ciliopathy with a complex clinical presentation that includes significant overlap of the phenotypes described in Sensenbrenner syndrome and the unclassified SRPs. The accurate molecular diagnosis of this family exemplifies the power of exome sequencing in the diagnosis of Mendelian disorders and enabled us to broaden and refine our understanding of Sensenbrenner syndrome and SRP. Detailed genotype-phenotype information is provided as well as discussion of previously reported cases.
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Affiliation(s)
- Carlos A Bacino
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA
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Dhar SU, Chintagumpala M, Noll C, Chévez-Barrios P, Paysse EA, Plon SE. Outcomes of integrating genetics in management of patients with retinoblastoma. ACTA ACUST UNITED AC 2012; 129:1428-34. [PMID: 22084214 DOI: 10.1001/archophthalmol.2011.292] [Citation(s) in RCA: 20] [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] [Indexed: 11/14/2022]
Abstract
OBJECTIVE To present the outcome of a comprehensive team approach to provide genetic evaluation and testing for a large cohort of children diagnosed with retinoblastoma. METHODS The multidisciplinary team included pediatric oncologists, an ophthalmologist, an ophthalmic pathologist, a geneticist, and genetic counselors. Retrospective data from 8 years included 90 initial evaluations, of which 81 probands were diagnosed with retinoblastoma (34 bilateral and 47 unilateral) and 9 were evaluated because of a positive family history. RESULTS Genetic testing was accomplished equivalently in bilateral and unilateral cases in 51 of 81 patients (63%). In 5 of 30 patients (17%), with unilateral disease an RB1 mutation was identified in peripheral blood samples. In another 7 of 30 patients (23%), mutation analysis confirmed the occurrence of sporadic retinoblastoma. Overall, genetic testing of 48 at-risk family members from 21 families revealed 6 individuals positive and 42 negative for the familial mutation. CONCLUSIONS Our study emphasizes that genetics can be incorporated into the management plan of all retinoblastoma patients using a team approach to ensure timely evaluations and appropriate counseling. Genetic evaluations improved risk prediction for patients and family members as well as prevented overutilization of clinical screening tests, which had potential morbidity for relatives documented to not carry an RB1 mutation.
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Affiliation(s)
- Shweta U Dhar
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
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28
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Liu P, Erez A, Nagamani SCS, Dhar SU, Kołodziejska KE, Dharmadhikari AV, Cooper ML, Wiszniewska J, Zhang F, Withers MA, Bacino CA, Campos-Acevedo LD, Delgado MR, Freedenberg D, Garnica A, Grebe TA, Hernández-Almaguer D, Immken L, Lalani SR, McLean SD, Northrup H, Scaglia F, Strathearn L, Trapane P, Kang SHL, Patel A, Cheung SW, Hastings PJ, Stankiewicz P, Lupski JR, Bi W. Chromosome catastrophes involve replication mechanisms generating complex genomic rearrangements. Cell 2011; 146:889-903. [PMID: 21925314 DOI: 10.1016/j.cell.2011.07.042] [Citation(s) in RCA: 320] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Revised: 06/06/2011] [Accepted: 07/25/2011] [Indexed: 10/25/2022]
Abstract
Complex genomic rearrangements (CGRs) consisting of two or more breakpoint junctions have been observed in genomic disorders. Recently, a chromosome catastrophe phenomenon termed chromothripsis, in which numerous genomic rearrangements are apparently acquired in one single catastrophic event, was described in multiple cancers. Here, we show that constitutionally acquired CGRs share similarities with cancer chromothripsis. In the 17 CGR cases investigated, we observed localization and multiple copy number changes including deletions, duplications, and/or triplications, as well as extensive translocations and inversions. Genomic rearrangements involved varied in size and complexities; in one case, array comparative genomic hybridization revealed 18 copy number changes. Breakpoint sequencing identified characteristic features, including small templated insertions at breakpoints and microhomology at breakpoint junctions, which have been attributed to replicative processes. The resemblance between CGR and chromothripsis suggests similar mechanistic underpinnings. Such chromosome catastrophic events appear to reflect basic DNA metabolism operative throughout an organism's life cycle.
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Affiliation(s)
- Pengfei Liu
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
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Dhar SU, Alford RL, Nelson EA, Potocki L. Enhancing exposure to genetics and genomics through an innovative medical school curriculum. Genet Med 2011; 14:163-7. [DOI: 10.1038/gim.0b013e31822dd7d4] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Dhar SU, Cooper HP, Wang T, Parks B, Staggs SA, Hilsenbeck S, Plon SE. Significant differences among physician specialties in management recommendations of BRCA1 mutation carriers. Breast Cancer Res Treat 2011; 129:221-7. [PMID: 21465171 DOI: 10.1007/s10549-011-1449-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2011] [Accepted: 03/10/2011] [Indexed: 11/24/2022]
Abstract
The National Comprehensive Cancer Network (NCCN) has published guidelines for hereditary breast and ovarian cancer syndrome (HBOCS) management. Little data exist on compliance with these guidelines among different physician specialties. We performed an on-line case-based survey by randomly sampling physicians from five specialties, Family Medicine (FM), Obstetrics and Gynecology (OG), General Surgery (GS), Internal Medicine (IM), and Hematology and Oncology (HO). The physicians (n = 225) were asked to provide HBOCS management of healthy women ages 40-42 in the presence of a familial BRCA1 mutation. For women negative for the BRCA1 mutation, 59% of the physicians recommended appropriate surveillance although with significant differences among specialties; P = 0.01. Using an aggregate screening intensity score, physicians clearly recommended more intense screening for mutation positive than negative women (P < 0.0001), but only 16% of physicians followed NCCN guidelines for BRCA1-positive women. Seventy-six percent of all physicians recommended breast MRI with significant variation among specialties ranging from 62% of FM to 89% of OG (P = 0.0020). Similarly, 63% of physicians recommended prophylactic oophorectomy, with 76 and 78% of GS and OG compared to 38% of IM (P < 0.0001) and 57% recommended prophylactic mastectomy ranging from 84% of HO to 32% of FM (P < 0.0001). Independent of specialty, respondents with BRCA testing experience recommended more intense management than those without; P = 0.021. Management recommendations of BRCA1 mutation carriers are not consistent with NCCN guidelines and vary by medical specialty and genetic testing experience. Targeted education of physicians by specialty is needed, so that optimal management is offered to these high-risk women.
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Affiliation(s)
- S U Dhar
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, TX, USA
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31
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Abstract
We report here on a 25-year follow-up of cranio-meta-diaphyseal dysplasia in a 31-year-old Caucasian male, who was reported in the literature at the age of 8 years [Langer et al. (1991); Skeletal Radiol 20:37-41]. He has hyperostotic craniofacial features with protruding lower jaw and midface hypoplasia. He has the typical radiographic features of wide long tubular bones without normal metaphyseal flaring and wide short tubular bones without normal diaphyseal constriction. We describe here his clinical and radiological findings and compare his case with those published in the literature. He is the oldest reported patient with this disorder giving some insight into the natural history of this rare skeletal dysplasia.
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Affiliation(s)
- Shweta U Dhar
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA.
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32
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Dhar SU, del Gaudio D, German JR, Peters SU, Ou Z, Bader PI, Berg JS, Blazo M, Brown CW, Graham BH, Grebe TA, Lalani S, Irons M, Sparagana S, Williams M, Phillips JA, Beaudet AL, Stankiewicz P, Patel A, Cheung SW, Sahoo T. 22q13.3 deletion syndrome: clinical and molecular analysis using array CGH. Am J Med Genet A 2010; 152A:573-81. [PMID: 20186804 DOI: 10.1002/ajmg.a.33253] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The 22q13.3 deletion syndrome results from loss of terminal segments of varying sizes at 22qter. Few genotype-phenotype correlations have been found but all patients have mental retardation and severe delay, or absence of, expressive speech. We carried out clinical and molecular characterization of 13 patients. Developmental delay and speech abnormalities were common to all and comparable in frequency and severity to previously reported cases. Array-based comparative genomic hybridization showed the deletions to vary from 95 kb to 8.5 Mb. We also carried out high-resolution 244K array comparative genomic hybridization in 10 of 13 patients, that defined the proximal and distal breakpoints of each deletion and helped determine the size, extent, and gene content within the deletion. Two patients had a smaller 95 kb terminal deletion with breakpoints within the SHANK3 gene while three other patients had a similar 5.5 Mb deletion implying the recurrent nature of these deletions. The two largest deletions were found in patients with ring chromosome 22. No correlation could be made with deletion size and phenotype although complete/partial SHANK3 was deleted in all patients. There are very few reports on array comparative genomic hybridization analysis on patients with the 22q13.3 deletion syndrome, and we aim to accurately characterize these patients both clinically and at the molecular level, to pave the way for further genotype-phenotype correlations. (c) 2010 Wiley-Liss, Inc.
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Affiliation(s)
- S U Dhar
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA
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Dhar SU, Robbins-Furman P, Levy ML, Patel A, Scaglia F. Tetrasomy 13q mosaicism associated with phylloid hypomelanosis and precocious puberty. Am J Med Genet A 2009; 149A:993-6. [PMID: 19334087 DOI: 10.1002/ajmg.a.32758] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Various forms of pigmentary dysplasias have been known to be associated with chromosomal mosaicism. One of these disorders, known as phylloid hypomelanosis, has been found to be predominantly associated with abnormalities in chromosome 13. Most of the reported literature involves mosaic trisomy 13 with clinical evidence of abnormal pigmentation in the form of leaf-like or oblong achromic macules following Blaschko's lines. Here, we report on an 8-year-old girl with phylloid hypomelanosis and precocious puberty who was found to have mosaicism for tetrasomy 13q in the form of inverted dup(13)(q21) on her skin fibroblasts as well as peripheral blood karyotype. A higher resolution (244K) chromosomal microarray was done on DNA from skin fibroblasts confirming the breakpoint and gain of distal 13q, which made her tetrasomic for 13q21-qter. This is the first-ever reported association of tetrasomy 13q with phylloid hypomelanosis and precocious puberty. Our report further emphasizes the need to exclude any type of abnormalities of chromosome 13 in patients with phylloid hypopigmentation.
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Affiliation(s)
- Shweta U Dhar
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA
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Dhar SU, Scaglia F, Li FY, Smith L, Barshop BA, Eng CM, Haas RH, Hunter JV, Lotze T, Maranda B, Willis M, Abdenur JE, Chen E, O'Brien W, Wong LJC. Expanded clinical and molecular spectrum of guanidinoacetate methyltransferase (GAMT) deficiency. Mol Genet Metab 2009; 96:38-43. [PMID: 19027335 DOI: 10.1016/j.ymgme.2008.10.008] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2008] [Revised: 10/13/2008] [Accepted: 10/13/2008] [Indexed: 11/29/2022]
Abstract
Guanidinoacetate methyltransferase (GAMT) deficiency is a disorder of creatine biosynthesis, characterized by excessive amounts of guanidinoacetate in body fluids, deficiency of creatine in the brain, and presence of mutations in the GAMT gene. We present here 8 new patients with GAMT deficiency along with their clinical, biochemical and molecular data. The age at diagnosis of our patients ranges from 0 to 14 years. The age of onset of seizures usually ranges from infancy to 3 years. However, one of our patients developed seizures at age 5; progressing to myoclonic epilepsy at age 8 years and another patient has not developed seizures at age 17 years. Five novel mutations were identified: c.37ins26 (p.G13PfsX38), c.403G>T (p.D135Y), c.507_521dup15 (p.C169_S173dup), c.402C>G (p.Y134X) and c.610_611delAGinsGAA (p.R204EfsX63). Six patients had the c.327G>A (last nucleotide of exon 2) splice-site mutation which suggests that this is one of the most common mutations in the GAMT gene, second only to the known Portuguese founder mutation, c.59G>C (p.W20S). Our data suggests that the clinical presentation can be variable and the diagnosis may be overlooked due to unawareness of this disorder. Therefore, GAMT deficiency should be considered in the differential diagnosis of progressive myoclonic epilepsy as well as in unexplained developmental delay or regression with dystonia, even if the patient has no history of seizures. As more patients are reported, the prevalence of GAMT deficiency will become known and guidelines for prenatal diagnosis, newborn screening, presymptomatic testing and treatment, will need to be formulated.
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Affiliation(s)
- S U Dhar
- Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, NAB 2015, Houston, TX 77030, USA
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