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Wong SSN, Yuen LYP, Kan E, Blau N, Rodenburg R, Lam CW, Wong VCN, Mochel F, Wevers RA, Fung CW. CYP2U1: An emerging treatable neurometabolic disease with cerebral folate deficiency in 2 Chinese brothers. Mol Genet Metab Rep 2024; 38:101023. [PMID: 38058766 PMCID: PMC10696413 DOI: 10.1016/j.ymgmr.2023.101023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/16/2023] [Accepted: 11/16/2023] [Indexed: 12/08/2023] Open
Abstract
With the rapid advancement of medical technologies in genomic and molecular medicine, the number of treatable neurometabolic diseases is quickly expanding. Spastic paraplegia 56 (SPG56), one of the severe autosomal recessive forms of neurodegenerative disorders caused by pathogenic variants in the CYP2U1 gene, has no reported specific targeted treatment yet. Here we report 2 Chinese brothers with CYP2U1 bi-allelic pathogenic variants with cerebral folate deficiency who were treated for over a decade with folinic acid supplement. Patients have remained stable under therapy.
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Affiliation(s)
- Sheila Suet-Na Wong
- Department of Paediatric and Adolescent Medicine, Hong Kong Children's Hospital, Hong Kong, China
| | - Liz Yuet-Ping Yuen
- Department of Pathology, Hong Kong Children's Hospital, Hong Kong, China
| | - Elaine Kan
- Department of Radiology, Hong Kong Children's Hospital, Hong Kong, China
| | - Nenad Blau
- Divisions of Metabolism, University Children's Hospital, Zürich, Switzerland
| | - Richard Rodenburg
- Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Ching-wan Lam
- Department of Pathology, The University of Hong Kong, Hong Kong, China
| | - Virginia Chun-Nei Wong
- Department of Paediatric and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Fanny Mochel
- AP-HP, Pitié-Salpêtrière University Hospital, Department of Medical Genetics, Reference Centers for Adult Neurometabolic Diseases and Adult Leukodystrophies, Paris, France
- INSERM U 1127, CNRS UMR 7225, Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau, ICM, Paris, France
| | - Ron A. Wevers
- Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Cheuk-Wing Fung
- Department of Paediatric and Adolescent Medicine, Hong Kong Children's Hospital, Hong Kong, China
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2
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Marouane A, Neveling K, Deden AC, van den Heuvel S, Zafeiropoulou D, Castelein S, van de Veerdonk F, Koolen DA, Simons A, Rodenburg R, Westra D, Mensenkamp AR, de Leeuw N, Ligtenberg M, Matthijsse R, Pfundt R, Kamsteeg EJ, Brunner HG, Gilissen C, Feenstra I, de Boode WP, Yntema HG, van Zelst-Stams WAG, Nelen M, Vissers LELM. Lessons learned from rapid exome sequencing for 575 critically ill patients across the broad spectrum of rare disease. Front Genet 2024; 14:1304520. [PMID: 38259611 PMCID: PMC10800954 DOI: 10.3389/fgene.2023.1304520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 12/18/2023] [Indexed: 01/24/2024] Open
Abstract
Introduction: Rapid exome sequencing (rES) has become the first-choice genetic test for critically ill patients, mostly neonates, young infants, or fetuses in prenatal care, in time-sensitive situations and when it is expected that the genetic test result may guide clinical decision making. The implementation of rES has revolutionized medicine by enabling timely identification of genetic causes for various rare diseases. The utilization of rES has increasingly been recognized as an essential diagnostic tool for the identification of complex and undiagnosed genetic disorders. Methods: We conducted a retrospective evaluation of our experiences with rES performed on 575 critically ill patients from various age groups (prenatal to adulthood), over a four-year period (2016-2019). These patients presented with a wide spectrum of rare diseases, including but not limited to neurological disorders, severe combined immune deficiency, and cancer. Results: During the study period, there was a significant increase in rES referrals, with a rise from a total of two referrals in Q1-2016 to 10 referrals per week in Q4-2019. The median turnaround time (TAT) decreased from 17 to 11 days in the period 2016-2019, with an overall median TAT of 11 days (IQR 8-15 days). The overall diagnostic yield for this cohort was 30.4%, and did not significantly differ between the different age groups (e.g. adults 22.2% vs children 31.0%; p-value 0.35). However, variability in yield was observed between clinical entities: craniofacial anomalies yielded 58.3%, while for three clinical entities (severe combined immune deficiency, aneurysm, and hypogonadotropic hypogonadism) no diagnoses were obtained. Discussion: Importantly, whereas clinical significance is often only attributed to a conclusive diagnosis, we also observed impact on clinical decision-making for individuals in whom no genetic diagnosis was established. Hence, our experience shows that rES has an important role for patients of all ages and across the broad spectrum of rare diseases to impact clinical outcomes.
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Affiliation(s)
- Abderrahim Marouane
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
- Department of Neonatology, Radboud University Medical Center, Radboud Institute for Health Sciences, Amalia Children’s Hospital, Nijmegen, Netherlands
| | - Kornelia Neveling
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
- Research Institute for Medical Innovation, Radboud University Medical Center, Nijmegen, Netherlands
| | - A. Chantal Deden
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Simone van den Heuvel
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Dimitra Zafeiropoulou
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Steven Castelein
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Frank van de Veerdonk
- Department of Internal Medicine, Radboud University Medical Center, Radboud Institute for Health Sciences, Nijmegen, Netherlands
| | - David A. Koolen
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Annet Simons
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Richard Rodenburg
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Dineke Westra
- Research Institute for Medical Innovation, Radboud University Medical Center, Nijmegen, Netherlands
| | - Arjen R. Mensenkamp
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Nicole de Leeuw
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Marjolijn Ligtenberg
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Rene Matthijsse
- Department of Neonatology, Radboud University Medical Center, Radboud Institute for Health Sciences, Amalia Children’s Hospital, Nijmegen, Netherlands
| | - Rolph Pfundt
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Erik Jan Kamsteeg
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Han G. Brunner
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Christian Gilissen
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Ilse Feenstra
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Willem P. de Boode
- Department of Neonatology, Radboud University Medical Center, Radboud Institute for Health Sciences, Amalia Children’s Hospital, Nijmegen, Netherlands
| | - Helger G. Yntema
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | | | - Marcel Nelen
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Lisenka E. L. M. Vissers
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
- Research Institute for Medical Innovation, Radboud University Medical Center, Nijmegen, Netherlands
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3
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Yuan T, Kumar S, Skinner M, Victor-Joseph R, Abuaita M, Keijer J, Zhang J, Kunkel TJ, Liu Y, Petrunak EM, Saunders TL, Lieberman AP, Stuckey JA, Neamati N, Al-Murshedi F, Alfadhel M, Spelbrink JN, Rodenburg R, de Boer VCJ, Lombard DB. SIRT5 variants from patients with mitochondrial disease are associated with reduced SIRT5 stability and activity, but not with neuropathology. bioRxiv 2023:2023.12.06.570371. [PMID: 38105987 PMCID: PMC10723467 DOI: 10.1101/2023.12.06.570371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
SIRT5 is a sirtuin deacylase that represents the major activity responsible for removal of negatively-charged lysine modifications, in the mitochondrial matrix and elsewhere in the cell. In benign cells and mouse models, under basal non-stressed conditions, the phenotypes of SIRT5 deficiency are generally quite subtle. Here, we identify two homozygous SIRT5 variants in human patients suffering from severe mitochondrial disease. Both variants, P114T and L128V, are associated with reduced SIRT5 protein stability and impaired biochemical activity, with no evidence of neomorphic or dominant negative properties. The crystal structure of the P114T enzyme was solved and shows only subtle deviations from wild-type. Via CRISPR-Cas9, we generate a mouse model that recapitulates the human P114T mutation; homozygotes show reduced SIRT5 levels and activity, but no obvious metabolic abnormalities, neuropathology or other gross evidence of severe disease. We conclude that these human SIRT5 variants most likely represent severe hypomorphs, and are likely not the primary pathogenic cause of the neuropathology observed in the patients.
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Affiliation(s)
- Taolin Yuan
- Human and Animal Physiology, Wageningen University, De Elst 1, Wageningen, The Netherlands
| | - Surinder Kumar
- Department of Pathology & Laboratory Medicine, Miller School of Medicine, and Sylvester Comprehensive Cancer Center, University of Miami, Miami FL 33136
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109
| | - Mary Skinner
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109
| | | | - Majd Abuaita
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109
| | - Jaap Keijer
- Human and Animal Physiology, Wageningen University, De Elst 1, Wageningen, The Netherlands
| | - Jessica Zhang
- Department of Pathology & Laboratory Medicine, Miller School of Medicine, and Sylvester Comprehensive Cancer Center, University of Miami, Miami FL 33136
| | | | - Yanghan Liu
- Department of Medicinal Chemistry, College of Pharmacy and Rogel Cancer Center, University of Michigan, Ann Arbor, Michigan 48109
| | - Elyse M. Petrunak
- Life Sciences Institute and Department of Biological Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Thomas L. Saunders
- Division of Genetic Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
| | | | - Jeanne A. Stuckey
- Life Sciences Institute and Department of Biological Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Nouri Neamati
- Department of Medicinal Chemistry, College of Pharmacy and Rogel Cancer Center, University of Michigan, Ann Arbor, Michigan 48109
| | - Fathiya Al-Murshedi
- Genetic and Developmental Medicine Clinic, Department of Genetics, Sultan Qaboos University Hospital, Sultan Qaboos University, Muscat, Oman
| | - Majid Alfadhel
- Medical Genomic Research Department, King Abdullah International Medical Research Center(KAIMRC), King Saud Bin Abdulaziz University for Health Sciences(KSAU-HS), Ministry of National Guard Health Affairs (MNG-HA), Riyadh, Saudi Arabia
- Genetics and Precision Medicine department (GPM), King Abdullah Specialized Children’s Hospital (KASCH), King Abdulaziz Medical City, Ministry of National Guard Health Affairs (MNG-HA), Riyadh, Saudi Arabia
| | - Johannes N. Spelbrink
- Radboud Center for Mitochondrial Medicine, Department of Pediatrics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Richard Rodenburg
- Radboud Center for Mitochondrial Medicine, Department of Pediatrics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Vincent C. J. de Boer
- Human and Animal Physiology, Wageningen University, De Elst 1, Wageningen, The Netherlands
| | - David B. Lombard
- Department of Pathology & Laboratory Medicine, Miller School of Medicine, and Sylvester Comprehensive Cancer Center, University of Miami, Miami FL 33136
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109
- Miami VA Healthcare System, Miami FL 33125
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4
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Wong TS, Belaramani KM, Chan CK, Chan WK, Chan WLL, Chang SK, Cheung SN, Cheung KY, Cheung YF, Chong SCJ, Chow CKJ, Chung HYB, Fan SYF, Fok WMJ, Fong KW, Fung THS, Hui KF, Hui TH, Hui J, Ko CH, Kwan MC, Kwok MKA, Kwok SSJ, Lai MS, Lam YO, Lam CW, Lau MC, Law CYE, Lee WC, Lee HCH, Lee CN, Leung KH, Leung KY, Li SH, Ling TKJ, Liu KTT, Lo FM, Lui HT, Luk CO, Luk HM, Ma CK, Ma K, Ma KH, Mew YN, Mo A, Ng SF, Poon WKG, Rodenburg R, Sheng B, Smeitink J, Szeto CLC, Tai SM, Tse CTA, Tsung LYL, Wong HMJ, Wong WYW, Wong KK, Wong SNS, Wong CNV, Wong WSS, Wong CKF, Wu SP, Wu HFJ, Yau MM, Yau KCE, Yeung WL, Yeung HMJ, Yip KKE, Young PHT, Yuan G, Yuen YPL, Yuen CL, Fung CW. Mitochondrial diseases in Hong Kong: prevalence, clinical characteristics and genetic landscape. Orphanet J Rare Dis 2023; 18:43. [PMID: 36859275 PMCID: PMC9979401 DOI: 10.1186/s13023-023-02632-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 02/06/2023] [Indexed: 03/03/2023] Open
Abstract
OBJECTIVE To determine the prevalence of mitochondrial diseases (MD) in Hong Kong (HK) and to evaluate the clinical characteristics and genetic landscape of MD patients in the region. METHODS This study retrospectively reviewed the phenotypic and molecular characteristics of MD patients from participating public hospitals in HK between January 1985 to October 2020. Molecularly and/or enzymatically confirmed MD cases of any age were recruited via the Clinical Analysis and Reporting System (CDARS) using relevant keywords and/or International Classification of Disease (ICD) codes under the HK Hospital Authority or through the personal recollection of treating clinicians among the investigators. RESULTS A total of 119 MD patients were recruited and analyzed in the study. The point prevalence of MD in HK was 1.02 in 100,000 people (95% confidence interval 0.81-1.28 in 100,000). 110 patients had molecularly proven MD and the other nine were diagnosed by OXPHOS enzymology analysis or mitochondrial DNA depletion analysis with unknown molecular basis. Pathogenic variants in the mitochondrial genome (72 patients) were more prevalent than those in the nuclear genome (38 patients) in our cohort. The most commonly involved organ system at disease onset was the neurological system, in which developmental delay, seizures or epilepsy, and stroke-like episodes were the most frequently reported presentations. The mortality rate in our cohort was 37%. CONCLUSION This study is a territory-wide overview of the clinical and genetic characteristics of MD patients in a Chinese population, providing the first available prevalence rate of MD in Hong Kong. The findings of this study aim to facilitate future in-depth evaluation of MD and lay the foundation to establish a local MD registry.
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Affiliation(s)
- Tsz-Sum Wong
- Department of Paediatrics and Adolescent Medicine, Princess Margaret Hospital, Hong Kong, SAR, People's Republic of China
| | - Kiran M Belaramani
- Department of Paediatrics and Adolescent Medicine, Hong Kong Children's Hospital, Hong Kong, SAR, People's Republic of China
| | - Chun-Kong Chan
- Department of Medicine and Geriatrics, United Christian Hospital, Hong Kong, SAR, People's Republic of China
| | - Wing-Ki Chan
- Department of Paediatrics and Adolescent Medicine, Princess Margaret Hospital, Hong Kong, SAR, People's Republic of China
| | - Wai-Lun Larry Chan
- Department of Medicine, Alice Ho Miu Ling Nethersole Hospital, Hong Kong, SAR, People's Republic of China
| | - Shek-Kwan Chang
- Department of Medicine, Queen Mary Hospital, Hong Kong, SAR, People's Republic of China
| | - Sing-Ngai Cheung
- Department of Medicine and Geriatrics, Kwong Wah Hospital, Hong Kong, SAR, People's Republic of China
| | - Ka-Yin Cheung
- Department of Medicine and Geriatrics, United Christian Hospital, Hong Kong, SAR, People's Republic of China
| | - Yuk-Fai Cheung
- Department of Medicine, Queen Elizabeth Hospital, Hong Kong, SAR, People's Republic of China
| | - Shuk-Ching Josephine Chong
- Department of Paediatrics, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, SAR, People's Republic of China
| | - Chi-Kwan Jasmine Chow
- Department of Paediatrics and Adolescent Medicine, Queen Elizabeth Hospital, Hong Kong, SAR, People's Republic of China
| | - Hon-Yin Brian Chung
- Department of Paediatrics & Adolescent Medicine, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, SAR, People's Republic of China
- Hong Kong Genome Institute, Hong Kong, SAR, People's Republic of China
| | - Sin-Ying Florence Fan
- Department of Medicine and Therapeutics, Prince of Wales Hospital, Hong Kong, SAR, People's Republic of China
| | - Wai-Ming Joshua Fok
- Department of Medicine, Yan Chai Hospital, Hong Kong, SAR, People's Republic of China
| | - Ka-Wing Fong
- Department of Medicine, Queen Elizabeth Hospital, Hong Kong, SAR, People's Republic of China
| | - Tsui-Hang Sharon Fung
- Department of Paediatrics and Adolescent Medicine, Kwong Wah Hospital, Hong Kong, SAR, People's Republic of China
| | - Kwok-Fai Hui
- Department of Medicine and Geriatrics, United Christian Hospital, Hong Kong, SAR, People's Republic of China
| | - Ting-Hin Hui
- Department of Medicine and Geriatrics, United Christian Hospital, Hong Kong, SAR, People's Republic of China
| | - Joannie Hui
- Department of Paediatrics and Adolescent Medicine, Hong Kong Children's Hospital, Hong Kong, SAR, People's Republic of China
| | - Chun-Hung Ko
- Department of Paediatrics and Adolescent Medicine, Caritas Medical Centre, Hong Kong, SAR, People's Republic of China
| | - Min-Chung Kwan
- Department of Medicine and Geriatrics, Kwong Wah Hospital, Hong Kong, SAR, People's Republic of China
| | - Mei-Kwan Anne Kwok
- Department of Paediatrics and Adolescent Medicine, Hong Kong Children's Hospital, Hong Kong, SAR, People's Republic of China
| | - Sung-Shing Jeffrey Kwok
- Department of Chemical Pathology, Prince of Wales Hospital, Hong Kong, SAR, People's Republic of China
| | - Moon-Sing Lai
- Department of Medicine, North District Hospital, Hong Kong, SAR, People's Republic of China
| | - Yau-On Lam
- Department of Medicine and Geriatrics, United Christian Hospital, Hong Kong, SAR, People's Republic of China
| | - Ching-Wan Lam
- Department of Pathology, The University of Hong Kong, Hong Kong, SAR, People's Republic of China
| | - Ming-Chung Lau
- Department of Paediatrics and Adolescent Medicine, United Christian Hospital, Hong Kong, SAR, People's Republic of China
| | - Chun-Yiu Eric Law
- Department of Chemical Pathology, Queen Mary Hospital, Hong Kong, SAR, People's Republic of China
| | - Wing-Cheong Lee
- Department of Paediatrics and Adolescent Medicine, Pamela Youde Nethersole Eastern Hospital, Hong Kong, SAR, People's Republic of China
| | - Han-Chih Hencher Lee
- Department of Chemical Pathology, Princess Margaret Hospital, Hong Kong, SAR, People's Republic of China
| | - Chin-Nam Lee
- Department of Medicine, Pamela Youde Nethersole Eastern Hospital, Hong Kong, SAR, People's Republic of China
| | - Kin-Hang Leung
- Department of Medicine, Queen Elizabeth Hospital, Hong Kong, SAR, People's Republic of China
| | - Kit-Yan Leung
- Department of Paediatrics and Adolescent Medicine, Princess Margaret Hospital, Hong Kong, SAR, People's Republic of China
| | - Siu-Hung Li
- Department of Medicine, North District Hospital, Hong Kong, SAR, People's Republic of China
| | - Tsz-Ki Jacky Ling
- Department of Chemical Pathology, Queen Mary Hospital, Hong Kong, SAR, People's Republic of China
| | - Kam-Tim Timothy Liu
- Department of Paediatrics and Adolescent Medicine, Pamela Youde Nethersole Eastern Hospital, Hong Kong, SAR, People's Republic of China
| | - Fai-Man Lo
- Department of Health, Clinical Genetic Service, Hong Kong, SAR, People's Republic of China
| | - Hiu-Tung Lui
- Department of Medicine, Tseung Kwan O Hospital, Hong Kong, SAR, People's Republic of China
| | - Ching-On Luk
- Department of Medicine, Queen Elizabeth Hospital, Hong Kong, SAR, People's Republic of China
| | - Ho-Ming Luk
- Clinical Genetics Service Unit, Hong Kong Children's Hospital, Hong Kong, SAR, People's Republic of China
| | - Che-Kwan Ma
- Department of Paediatrics and Adolescent Medicine, United Christian Hospital, Hong Kong, SAR, People's Republic of China
| | - Karen Ma
- Department of Medicine and Therapeutics, Prince of Wales Hospital, Hong Kong, SAR, People's Republic of China
| | - Kam-Hung Ma
- Department of Paediatrics and Adolescent Medicine, Alice Ho Miu Ling Nethersole hospital, Hong Kong, SAR, People's Republic of China
| | - Yuen-Ni Mew
- Department of Medicine and Geriatrics, United Christian Hospital, Hong Kong, SAR, People's Republic of China
| | - Alex Mo
- Department of Paediatrics and Adolescent Medicine, Kwong Wah Hospital, Hong Kong, SAR, People's Republic of China
| | - Sui-Fun Ng
- Department of Paediatrics and Adolescent Medicine, Princess Margaret Hospital, Hong Kong, SAR, People's Republic of China
| | - Wing-Kit Grace Poon
- Department of Paediatrics and Adolescent Medicine, Queen Mary Hospital, Hong Kong, SAR, People's Republic of China
| | - Richard Rodenburg
- Department of Paediatrics, Radboud Centre for Mitochondrial Medicine, Radboud Institute for Molecular Life Sciences, Radboud University Nijmegen Medicine Centre, Nijmegen, The Netherlands
| | - Bun Sheng
- Department of Medicine and Geriatrics, Princess Margaret Hospital, Hong Kong, SAR, People's Republic of China
| | - Jan Smeitink
- Department of Paediatrics, Radboud Centre for Mitochondrial Medicine, Radboud Institute for Molecular Life Sciences, Radboud University Nijmegen Medicine Centre, Nijmegen, The Netherlands
| | - Cheuk-Ling Charing Szeto
- Department of Medicine and Geriatrics, United Christian Hospital, Hong Kong, SAR, People's Republic of China
| | - Shuk-Mui Tai
- Department of Paediatrics and Adolescent Medicine, Pamela Youde Nethersole Eastern Hospital, Hong Kong, SAR, People's Republic of China
| | - Choi-Ting Alan Tse
- Department of Medicine, Yan Chai Hospital, Hong Kong, SAR, People's Republic of China
| | - Li-Yan Lilian Tsung
- Department of Paediatrics and Adolescent Medicine, Pamela Youde Nethersole Eastern Hospital, Hong Kong, SAR, People's Republic of China
| | - Ho-Ming June Wong
- Department of Medicine and Geriatrics, Caritas Medical Centre, Hong Kong, SAR, People's Republic of China
| | - Wing-Yin Winnie Wong
- Department of Medicine and Geriatrics, Caritas Medical Centre, Hong Kong, SAR, People's Republic of China
| | - Kwok-Kui Wong
- Department of Medicine, Yan Chai Hospital, Hong Kong, SAR, People's Republic of China
| | - Suet-Na Sheila Wong
- Department of Paediatrics and Adolescent Medicine, Hong Kong Children's Hospital, Hong Kong, SAR, People's Republic of China
| | - Chun-Nei Virginia Wong
- Department of Paediatrics & Adolescent Medicine, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, SAR, People's Republic of China
| | - Wai-Shan Sammy Wong
- Department of Pathology, Queen Elizabeth Hospital, Hong Kong, SAR, People's Republic of China
| | - Chi-Kin Felix Wong
- Department of Chemical Pathology, Queen Mary Hospital, Hong Kong, SAR, People's Republic of China
| | - Shun-Ping Wu
- Department of Paediatrics and Adolescent Medicine, Queen Elizabeth Hospital, Hong Kong, SAR, People's Republic of China
| | - Hiu-Fung Jerome Wu
- Department of Medicine and Geriatrics, Princess Margaret Hospital, Hong Kong, SAR, People's Republic of China
| | - Man-Mut Yau
- Department of Paediatrics and Adolescent Medicine, Tseung Kwan O Hospital, Hong Kong, SAR, People's Republic of China
| | - Kin-Cheong Eric Yau
- Department of Paediatrics and Adolescent Medicine, Princess Margaret Hospital, Hong Kong, SAR, People's Republic of China
| | - Wai-Lan Yeung
- Department of Paediatrics and Adolescent Medicine, Hong Kong Children's Hospital, Hong Kong, SAR, People's Republic of China
| | - Hon-Ming Jonas Yeung
- Department of Medicine, Alice Ho Miu Ling Nethersole Hospital, Hong Kong, SAR, People's Republic of China
| | - Kin-Keung Edwin Yip
- Department of Medicine and Geriatrics, Ruttonjee and Tang Shiu Kin Hospitals, Hong Kong, SAR, People's Republic of China
| | - Pui-Hong Terence Young
- Department of Medicine and Geriatrics, Ruttonjee and Tang Shiu Kin Hospitals, Hong Kong, SAR, People's Republic of China
| | - Gao Yuan
- Department of Medicine, Queen Mary Hospital, Hong Kong, SAR, People's Republic of China
| | - Yuet-Ping Liz Yuen
- Department of Chemical Pathology, Hong Kong Children's Hospital, Hong Kong, SAR, People's Republic of China
| | - Chi-Lap Yuen
- Department of Medicine and Geriatrics, Tuen Mun Hospital, Hong Kong, SAR, People's Republic of China
| | - Cheuk-Wing Fung
- Department of Paediatrics and Adolescent Medicine, Hong Kong Children's Hospital, Hong Kong, SAR, People's Republic of China.
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5
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Wortmann SB, Oud MM, Alders M, Coene KLM, van der Crabben SN, Feichtinger RG, Garanto A, Hoischen A, Langeveld M, Lefeber D, Mayr JA, Ockeloen CW, Prokisch H, Rodenburg R, Waterham HR, Wevers RA, van de Warrenburg BPC, Willemsen MAAP, Wolf NI, Vissers LELM, van Karnebeek CDM. How to proceed after "negative" exome: A review on genetic diagnostics, limitations, challenges, and emerging new multiomics techniques. J Inherit Metab Dis 2022; 45:663-681. [PMID: 35506430 PMCID: PMC9539960 DOI: 10.1002/jimd.12507] [Citation(s) in RCA: 18] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 04/26/2022] [Accepted: 04/27/2022] [Indexed: 11/28/2022]
Abstract
Exome sequencing (ES) in the clinical setting of inborn metabolic diseases (IMDs) has created tremendous improvement in achieving an accurate and timely molecular diagnosis for a greater number of patients, but it still leaves the majority of patients without a diagnosis. In parallel, (personalized) treatment strategies are increasingly available, but this requires the availability of a molecular diagnosis. IMDs comprise an expanding field with the ongoing identification of novel disease genes and the recognition of multiple inheritance patterns, mosaicism, variable penetrance, and expressivity for known disease genes. The analysis of trio ES is preferred over singleton ES as information on the allelic origin (paternal, maternal, "de novo") reduces the number of variants that require interpretation. All ES data and interpretation strategies should be exploited including CNV and mitochondrial DNA analysis. The constant advancements in available techniques and knowledge necessitate the close exchange of clinicians and molecular geneticists about genotypes and phenotypes, as well as knowledge of the challenges and pitfalls of ES to initiate proper further diagnostic steps. Functional analyses (transcriptomics, proteomics, and metabolomics) can be applied to characterize and validate the impact of identified variants, or to guide the genomic search for a diagnosis in unsolved cases. Future diagnostic techniques (genome sequencing [GS], optical genome mapping, long-read sequencing, and epigenetic profiling) will further enhance the diagnostic yield. We provide an overview of the challenges and limitations inherent to ES followed by an outline of solutions and a clinical checklist, focused on establishing a diagnosis to eventually achieve (personalized) treatment.
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Affiliation(s)
- Saskia B. Wortmann
- Radboud Center for Mitochondrial and Metabolic Medicine, Department of PediatricsAmalia Children's Hospital, Radboud University Medical CenterNijmegenThe Netherlands
- University Children's Hospital, Paracelsus Medical UniversitySalzburgAustria
| | - Machteld M. Oud
- United for Metabolic DiseasesAmsterdamThe Netherlands
- Department of Human GeneticsDonders Institute for Brain, Cognition and Behaviour, Radboud University Medical CenterNijmegenThe Netherlands
| | - Mariëlle Alders
- Department of Human GeneticsAmsterdam UMC, University of Amsterdam, Amsterdam Reproduction and Development Research InstituteAmsterdamThe Netherlands
| | - Karlien L. M. Coene
- United for Metabolic DiseasesAmsterdamThe Netherlands
- Translational Metabolic Laboratory, Department of Laboratory MedicineRadboud University Medical CenterNijmegenThe Netherlands
| | - Saskia N. van der Crabben
- Department of Human GeneticsAmsterdam University Medical Centers, University of AmsterdamAmsterdamThe Netherlands
| | - René G. Feichtinger
- University Children's Hospital, Paracelsus Medical UniversitySalzburgAustria
| | - Alejandro Garanto
- Radboud Center for Mitochondrial and Metabolic Medicine, Department of PediatricsAmalia Children's Hospital, Radboud University Medical CenterNijmegenThe Netherlands
- Department of PediatricsAmalia Children's Hospital, Radboud Institute for Molecular LifesciencesNijmegenThe Netherlands
- Department of Human GeneticsRadboud Institute for Molecular LifesciencesNijmegenThe Netherlands
| | - Alex Hoischen
- Department of Human Genetics, Department of Internal Medicine and Radboud Center for Infectious DiseasesRadboud Institute of Medical Life Sciences, Radboud University Medical CenterNijmegenthe Netherlands
| | - Mirjam Langeveld
- Department of Endocrinology and MetabolismAmsterdam University Medical Centers, location AMC, University of AmsterdamAmsterdamThe Netherlands
| | - Dirk Lefeber
- United for Metabolic DiseasesAmsterdamThe Netherlands
- Translational Metabolic Laboratory, Department of Laboratory MedicineRadboud University Medical CenterNijmegenThe Netherlands
- Department of Neurology, Donders Institute for BrainCognition and Behaviour, Radboud University Medical CenterNijmegenThe Netherlands
| | - Johannes A. Mayr
- University Children's Hospital, Paracelsus Medical UniversitySalzburgAustria
| | - Charlotte W. Ockeloen
- Department of Human GeneticsRadboud Institute for Molecular LifesciencesNijmegenThe Netherlands
| | - Holger Prokisch
- School of MedicineInstitute of Human Genetics, Technical University Munich and Institute of NeurogenomicsNeuherbergGermany
| | - Richard Rodenburg
- Radboud Center for Mitochondrial and Metabolic MedicineTranslational Metabolic Laboratory, Department of Pediatrics, Radboud University Medical CenterNijmegenThe Netherlands
| | - Hans R. Waterham
- United for Metabolic DiseasesAmsterdamThe Netherlands
- Laboratory Genetic Metabolic Diseases, Department of Clinical ChemistryAmsterdam University Medical Centers, location AMC, University of AmsterdamAmsterdamThe Netherlands
| | - Ron A. Wevers
- United for Metabolic DiseasesAmsterdamThe Netherlands
- Translational Metabolic Laboratory, Department of Laboratory MedicineRadboud University Medical CenterNijmegenThe Netherlands
| | - Bart P. C. van de Warrenburg
- Department of Neurology, Donders Institute for BrainCognition and Behaviour, Radboud University Medical CenterNijmegenThe Netherlands
| | - Michel A. A. P. Willemsen
- Departments of Pediatric Neurology and PediatricsAmalia Children's Hospital, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical CenterNijmegenThe Netherlands
| | - Nicole I. Wolf
- Amsterdam Leukodystrophy Center, Department of Child NeurologyEmma Children's Hospital, Amsterdam University Medical Centers, Vrije Universiteit AmsterdamAmsterdamThe Netherlands
| | - Lisenka E. L. M. Vissers
- Department of Human GeneticsDonders Institute for Brain, Cognition and Behaviour, Radboud University Medical CenterNijmegenThe Netherlands
| | - Clara D. M. van Karnebeek
- Radboud Center for Mitochondrial and Metabolic Medicine, Department of PediatricsAmalia Children's Hospital, Radboud University Medical CenterNijmegenThe Netherlands
- United for Metabolic DiseasesAmsterdamThe Netherlands
- Department of Human GeneticsAmsterdam UMC, University of Amsterdam, Amsterdam Reproduction and Development Research InstituteAmsterdamThe Netherlands
- Department of Pediatrics, Emma Center for Personalized MedicineAmsterdam University Medical Centers, Amsterdam, Amsterdam Genetics Endocrinology Metabolism Research Institute, University of AmsterdamAmsterdamThe Netherlands
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6
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Vanoevelen JM, Bierau J, Grashorn JC, Lambrichs E, Kamsteeg EJ, Bok LA, Wevers RA, van der Knaap MS, Bugiani M, Frisk JH, Colnaghi R, O'Driscoll M, Hellebrekers DMEI, Rodenburg R, Ferreira CR, Brunner HG, van den Wijngaard A, Abdel-Salam GMH, Wang L, Stumpel CTRM. DTYMK is essential for genome integrity and neuronal survival. Acta Neuropathol 2022; 143:245-262. [PMID: 34918187 PMCID: PMC8742820 DOI: 10.1007/s00401-021-02394-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 12/03/2021] [Accepted: 12/03/2021] [Indexed: 11/28/2022]
Abstract
Nucleotide metabolism is a complex pathway regulating crucial cellular processes such as nucleic acid synthesis, DNA repair and proliferation. This study shows that impairment of the biosynthesis of one of the building blocks of DNA, dTTP, causes a severe, early-onset neurodegenerative disease. Here, we describe two unrelated children with bi-allelic variants in DTYMK, encoding dTMPK, which catalyzes the penultimate step in dTTP biosynthesis. The affected children show severe microcephaly and growth retardation with minimal neurodevelopment. Brain imaging revealed severe cerebral atrophy and disappearance of the basal ganglia. In cells of affected individuals, dTMPK enzyme activity was minimal, along with impaired DNA replication. In addition, we generated dtymk mutant zebrafish that replicate this phenotype of microcephaly, neuronal cell death and early lethality. An increase of ribonucleotide incorporation in the genome as well as impaired responses to DNA damage were observed in dtymk mutant zebrafish, providing novel pathophysiological insights. It is highly remarkable that this deficiency is viable as an essential component for DNA cannot be generated, since the metabolic pathway for dTTP synthesis is completely blocked. In summary, by combining genetic and biochemical approaches in multiple models we identified loss-of-function of DTYMK as the cause of a severe postnatal neurodegenerative disease and highlight the essential nature of dTTP synthesis in the maintenance of genome stability and neuronal survival.
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Affiliation(s)
- Jo M Vanoevelen
- Department of Clinical Genetics, Maastricht University Medical Centre+, 6229 ER, Maastricht, The Netherlands.
- GROW-School for Oncology and Developmental Biology, 6229 ER, Maastricht, The Netherlands.
| | - Jörgen Bierau
- Department of Clinical Genetics, Maastricht University Medical Centre+, 6229 ER, Maastricht, The Netherlands
| | - Janine C Grashorn
- Department of Clinical Genetics, Maastricht University Medical Centre+, 6229 ER, Maastricht, The Netherlands
| | - Ellen Lambrichs
- Department of Clinical Genetics, Maastricht University Medical Centre+, 6229 ER, Maastricht, The Netherlands
| | - Erik-Jan Kamsteeg
- Department of Human Genetics, Radboud UMC, 6525 GA, Nijmegen, The Netherlands
| | - Levinus A Bok
- Department of Pediatrics, Màxima Medical Center, 5504 DB, Veldhoven, The Netherlands
| | - Ron A Wevers
- Translational Metabolic Laboratory, Radboud UMC, 6525 GA, Nijmegen, The Netherlands
| | | | - Marianna Bugiani
- Department of Neuropathology, VUMC, 1105 AZ, Amsterdam, The Netherlands
| | - Junmei Hu Frisk
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, 75007, Uppsala, Sweden
| | - Rita Colnaghi
- Genome Damage and Stability Centre, University of Sussex, Brighton, BN1 9RH, UK
| | - Mark O'Driscoll
- Genome Damage and Stability Centre, University of Sussex, Brighton, BN1 9RH, UK
| | - Debby M E I Hellebrekers
- Department of Clinical Genetics, Maastricht University Medical Centre+, 6229 ER, Maastricht, The Netherlands
| | - Richard Rodenburg
- Translational Metabolic Laboratory, Radboud UMC, 6525 GA, Nijmegen, The Netherlands
| | - Carlos R Ferreira
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Han G Brunner
- Department of Clinical Genetics, Maastricht University Medical Centre+, 6229 ER, Maastricht, The Netherlands
- Department of Human Genetics, Radboud UMC, 6525 GA, Nijmegen, The Netherlands
- GROW-School for Oncology and Developmental Biology, 6229 ER, Maastricht, The Netherlands
- MHENS School of Neuroscience, 6229 ER, Maastricht, The Netherlands
- Donders Institute of Neuroscience, Radboud UMC, 6525 GA, Nijmegen, The Netherlands
| | - Arthur van den Wijngaard
- Department of Clinical Genetics, Maastricht University Medical Centre+, 6229 ER, Maastricht, The Netherlands
| | - Ghada M H Abdel-Salam
- Department of Clinical Genetics, Human Genetics and Genome Research Division, National Research Centre, Cairo, 12311, Egypt
| | - Liya Wang
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, 75007, Uppsala, Sweden
| | - Constance T R M Stumpel
- Department of Clinical Genetics, Maastricht University Medical Centre+, 6229 ER, Maastricht, The Netherlands.
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7
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Klein Gunnewiek TM, Van Hugte EJH, Frega M, Guardia GS, Foreman K, Panneman D, Mossink B, Linda K, Keller JM, Schubert D, Cassiman D, Rodenburg R, Vidal Folch N, Oglesbee D, Perales-Clemente E, Nelson TJ, Morava E, Nadif Kasri N, Kozicz T. m.3243A > G-Induced Mitochondrial Dysfunction Impairs Human Neuronal Development and Reduces Neuronal Network Activity and Synchronicity. Cell Rep 2021; 31:107538. [PMID: 32320658 DOI: 10.1016/j.celrep.2020.107538] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 02/13/2020] [Accepted: 03/30/2020] [Indexed: 12/11/2022] Open
Abstract
Epilepsy, intellectual and cortical sensory deficits, and psychiatric manifestations are the most frequent manifestations of mitochondrial diseases. How mitochondrial dysfunction affects neural structure and function remains elusive, mostly because of a lack of proper in vitro neuronal model systems with mitochondrial dysfunction. Leveraging induced pluripotent stem cell technology, we differentiated excitatory cortical neurons (iNeurons) with normal (low heteroplasmy) and impaired (high heteroplasmy) mitochondrial function on an isogenic nuclear DNA background from patients with the common pathogenic m.3243A > G variant of mitochondrial encephalomyopathy, lactic acidosis, and stroke-like episodes (MELAS). iNeurons with high heteroplasmy exhibited mitochondrial dysfunction, delayed neural maturation, reduced dendritic complexity, and fewer excitatory synapses. Micro-electrode array recordings of neuronal networks displayed reduced network activity and decreased synchronous network bursting. Impaired neuronal energy metabolism and compromised structural and functional integrity of neurons and neural networks could be the primary drivers of increased susceptibility to neuropsychiatric manifestations of mitochondrial disease.
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Affiliation(s)
- Teun M Klein Gunnewiek
- Department of Anatomy, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB Nijmegen, the Netherlands; Department of Human Genetics, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB Nijmegen, the Netherlands
| | - Eline J H Van Hugte
- Department of Human Genetics, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB Nijmegen, the Netherlands
| | - Monica Frega
- Department of Human Genetics, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB Nijmegen, the Netherlands; Department of Clinical Neurophysiology, University of Twente, 7522 NB Enschede, the Netherlands
| | - Gemma Solé Guardia
- Department of Anatomy, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB Nijmegen, the Netherlands; Department of Human Genetics, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB Nijmegen, the Netherlands
| | - Katharina Foreman
- Department of Cognitive Neuroscience, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB Nijmegen, the Netherlands
| | - Daan Panneman
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA
| | - Britt Mossink
- Department of Human Genetics, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB Nijmegen, the Netherlands
| | - Katrin Linda
- Department of Human Genetics, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB Nijmegen, the Netherlands
| | - Jason M Keller
- Department of Human Genetics, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB Nijmegen, the Netherlands
| | - Dirk Schubert
- Department of Cognitive Neuroscience, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB Nijmegen, the Netherlands
| | - David Cassiman
- Department of Hepatology, UZ Leuven, 3000 Leuven, Belgium
| | - Richard Rodenburg
- Radboud Center for Mitochondrial Disorders, Radboudumc, 6500 HB Nijmegen, the Netherlands
| | - Noemi Vidal Folch
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA
| | - Devin Oglesbee
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA
| | | | - Timothy J Nelson
- Division of General Internal Medicine, Division of Pediatric Cardiology, Departments of Medicine, Molecular Pharmacology, and Experimental Therapeutics, Mayo Clinic Center for Regenerative Medicine, Rochester, MN 55905, USA
| | - Eva Morava
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA; Department of Clinical Genomics, Mayo Clinic, Rochester, MN 55905, USA
| | - Nael Nadif Kasri
- Department of Human Genetics, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB Nijmegen, the Netherlands; Department of Cognitive Neuroscience, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB Nijmegen, the Netherlands.
| | - Tamas Kozicz
- Department of Anatomy, Radboudumc, Donders Institute for Brain, Cognition, and Behaviour, 6500 HB Nijmegen, the Netherlands; Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA; Department of Clinical Genomics, Mayo Clinic, Rochester, MN 55905, USA; Department of Biochemistry and Molecular Biology, Mayo Clinic, 55905 Rochester, MN, USA.
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8
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Belkheir AM, Reunert J, Elpers C, van den Heuvel L, Rodenburg R, Seelhöfer A, Rust S, Jeibmann A, Frosch M, Marquardt T. Severe Form of ßIV-Spectrin Deficiency With Mitochondrial Dysfunction and Cardiomyopathy-A Case Report. Front Neurol 2021; 12:643805. [PMID: 33986717 PMCID: PMC8110827 DOI: 10.3389/fneur.2021.643805] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 03/25/2021] [Indexed: 11/13/2022] Open
Abstract
ßIV-spectrin is a protein of the spectrin family which is involved in the organization of the cytoskeleton structure and is found in high quantity in the axon initial segment and the nodes of Ranvier. Together with ankyrin G, ßIV-spectrin is responsible for the clustering of KCNQ2/3-potassium channels and NaV-sodium channels. Loss or reduction of ßIV-spectrin causes a destabilization of the cytoskeleton and an impairment in the generation of the action potential, which leads to neuronal degeneration. Furthermore, ßIV-spectrin has been described to play an important role in the maintenance of the neuronal polarity and of the diffusion barrier. ßIV-spectrin is also located in the heart where it takes an important part in the structural organization of ion channels and has also been described to participate in cell signaling pathways through binding of transcription factors. We describe two patients with a severe form of ßIV-spectrin deficiency. Whole-exome sequencing revealed the homozygous stop mutation c.6016C>T (p.R2006*) in the SPTBN4 gene. The phenotype of these patients is characterized by profound psychomotor developmental arrest, respiratory insufficiency and deafness. Additionally one of the patients presents with cardiomyopathy, optical nerve atrophy, and mitochondrial dysfunction. This is the first report of a severe form of ßIV-spectrin deficiency with hypertrophic cardiomyopathy and mitochondrial dysfunction.
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Affiliation(s)
- Aziza Miriam Belkheir
- Department of General Paediatrics, Metabolic Diseases, University Children's Hospital Muenster, Münster, Germany
| | - Janine Reunert
- Department of General Paediatrics, Metabolic Diseases, University Children's Hospital Muenster, Münster, Germany
| | - Christiane Elpers
- Department of General Paediatrics, Metabolic Diseases, University Children's Hospital Muenster, Münster, Germany
| | - Lambert van den Heuvel
- Translational Metabolic Laboratory, Department of Paediatrics, Radboud Center for Mitochondrial Medicine, Radboud UMC, Nijmegen, Netherlands
| | - Richard Rodenburg
- Translational Metabolic Laboratory, Department of Paediatrics, Radboud Center for Mitochondrial Medicine, Radboud UMC, Nijmegen, Netherlands
| | - Anja Seelhöfer
- Department of General Paediatrics, Metabolic Diseases, University Children's Hospital Muenster, Münster, Germany
| | - Stephan Rust
- Department of General Paediatrics, Metabolic Diseases, University Children's Hospital Muenster, Münster, Germany
| | - Astrid Jeibmann
- Institute of Neuropathology, University Hospital Muenster, Münster, Germany
| | - Michael Frosch
- Department of Children's Pain Therapy and Paediatric Palliative Care, Faculty of Health-School of Medicine, Witten/Herdecke University, Witten, Germany
| | - Thorsten Marquardt
- Department of General Paediatrics, Metabolic Diseases, University Children's Hospital Muenster, Münster, Germany
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9
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Cannata Serio M, Graham LA, Ashikov A, Larsen LE, Raymond K, Timal S, Le Meur G, Ryan M, Czarnowska E, Jansen JC, He M, Ficicioglu C, Pichurin P, Hasadsri L, Minassian B, Rugierri A, Kalimo H, Ríos‐Ocampo WA, Gilissen C, Rodenburg R, Jonker JW, Holleboom AG, Morava E, Veltman JA, Socha P, Stevens TH, Simons M, Lefeber DJ. Mutations in the V-ATPase Assembly Factor VMA21 Cause a Congenital Disorder of Glycosylation With Autophagic Liver Disease. Hepatology 2020; 72:1968-1986. [PMID: 32145091 PMCID: PMC7483274 DOI: 10.1002/hep.31218] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 02/14/2020] [Accepted: 02/14/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND AND AIMS Vacuolar H+-ATP complex (V-ATPase) is a multisubunit protein complex required for acidification of intracellular compartments. At least five different factors are known to be essential for its assembly in the endoplasmic reticulum (ER). Genetic defects in four of these V-ATPase assembly factors show overlapping clinical features, including steatotic liver disease and mild hypercholesterolemia. An exception is the assembly factor vacuolar ATPase assembly integral membrane protein (VMA21), whose X-linked mutations lead to autophagic myopathy. APPROACH AND RESULTS Here, we report pathogenic variants in VMA21 in male patients with abnormal protein glycosylation that result in mild cholestasis, chronic elevation of aminotransferases, elevation of (low-density lipoprotein) cholesterol and steatosis in hepatocytes. We also show that the VMA21 variants lead to V-ATPase misassembly and dysfunction. As a consequence, lysosomal acidification and degradation of phagocytosed materials are impaired, causing lipid droplet (LD) accumulation in autolysosomes. Moreover, VMA21 deficiency triggers ER stress and sequestration of unesterified cholesterol in lysosomes, thereby activating the sterol response element-binding protein-mediated cholesterol synthesis pathways. CONCLUSIONS Together, our data suggest that impaired lipophagy, ER stress, and increased cholesterol synthesis lead to LD accumulation and hepatic steatosis. V-ATPase assembly defects are thus a form of hereditary liver disease with implications for the pathogenesis of nonalcoholic fatty liver disease.
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Affiliation(s)
- Magda Cannata Serio
- Laboratory of Epithelial Biology and DiseaseImagine InstituteUniversité Paris Descartes‐Sorbonne Paris CitéParisFrance,RBIV RNA Biology of Influenza Viruses UnitInstitut PasteurCNRS, UMR3569ParisFrance
| | - Laurie A. Graham
- Department of Chemistry and BiochemistryInstitute of Molecular BiologyUniversity of OregonEugeneOR
| | - Angel Ashikov
- Department of NeurologyDonders Institute for BrainCognition and BehaviourRadboud University Medical CenterNijmegenthe Netherlands,Department of Laboratory MedicineTranslational Metabolic LaboratoryRadboud Institute for Molecular Life SciencesRadboud University Medical CenterNijmegenthe Netherlands
| | - Lars Elmann Larsen
- Department of Laboratory Medicine and PathologyMayo College of MedicineRochesterMN,Department of Chemistry and BiochemistryInstitute of Molecular BiologyUniversity of OregonEugeneOR
| | - Kimiyo Raymond
- Department of PathologyThe Children’s Memorial Health InstituteWarsawPoland
| | - Sharita Timal
- Department of NeurologyDonders Institute for BrainCognition and BehaviourRadboud University Medical CenterNijmegenthe Netherlands,Department of Laboratory MedicineTranslational Metabolic LaboratoryRadboud Institute for Molecular Life SciencesRadboud University Medical CenterNijmegenthe Netherlands
| | - Gwenn Le Meur
- Laboratory of Epithelial Biology and DiseaseImagine InstituteUniversité Paris Descartes‐Sorbonne Paris CitéParisFrance
| | - Margret Ryan
- Department of Gastroenterology and HepatologyTranslational Metabolic LaboratoryRadboud Institute for Molecular Life SciencesRadboud University Medical CenterNijmegenthe Netherlands
| | - Elzbieta Czarnowska
- Department of Pathology and Laboratory MedicineUniversity of PennsylvaniaPerelman School of MedicinePhiladelphiaPA
| | - Jos C. Jansen
- Division of Laboratory MedicineThe Children’s Hospital of PhiladelphiaPhiladelphiaPA
| | - Miao He
- Division of Human GeneticsDepartment of PediatricsThe Children’s Hospital of PhiladelphiaPhiladelphiaPA,Department of Clinical GenomicsCollege of MedicineMayo ClinicRochesterMN
| | - Can Ficicioglu
- Division of Laboratory GeneticsDepartment of Laboratory Medicine and PathologyMayo ClinicRochesterMN
| | - Pavel Pichurin
- Department of Human GeneticsRadboud Institute for Molecular Life SciencesRadboud University Medical CenterNijmegenthe Netherlands
| | - Linda Hasadsri
- Department of PediatricsRadboudumc Amalia Childrens HospitalRadboud Center for Mitochondrial MedicineNijmegenthe Netherlands
| | - Berge Minassian
- Department of PediatricsUniversity of Texas SouthwesternDallasTXUSA
| | - Alessandra Rugierri
- Department of Neuroimmunology and Neuromuscular DiseasesFondazione IRCCS Neurological Institute Carlo BestaMilanItaly,Department of Molecular and Translation MedicineUnit of Biology and Genetics, University of BresciaBresciaItaly
| | - Hannu Kalimo
- Department of Pathology, Haartman InstituteUniversity of Helsinki, FIN–00014HelsinkiFinland
| | | | | | - Richard Rodenburg
- Department of Human GeneticsDonders Centre for NeuroscienceRadboud University Medical CenterNijmegenthe Netherlands
| | - Johan W. Jonker
- Department of Laboratory Medicine and PathologyMayo College of MedicineRochesterMN
| | - Adriaan G. Holleboom
- Department of Chemistry and BiochemistryInstitute of Molecular BiologyUniversity of OregonEugeneOR
| | - Eva Morava
- Institute of Genetic MedicineInternational Centre for LifeNewcastle UniversityNewcastle upon TyneUnited Kingdom
| | - Joris A. Veltman
- Department of GastroenterologyFeeding Disorders and PediatricsChildren’s Memorial Health InstituteWarsawPoland,Section of Molecular Metabolism and NutritionDepartment of PediatricsUniversity of GroningenUniversity Medical Center GroningenGroningenthe Netherlands
| | - Piotr Socha
- Department of Experimental Vascular MedicineAmsterdam University Medical CentersLocation AMCAmsterdamthe Netherlands
| | - Tom H. Stevens
- Department of Gastroenterology and HepatologyTranslational Metabolic LaboratoryRadboud Institute for Molecular Life SciencesRadboud University Medical CenterNijmegenthe Netherlands
| | - Matias Simons
- Laboratory of Epithelial Biology and DiseaseImagine InstituteUniversité Paris Descartes‐Sorbonne Paris CitéParisFrance,Institute of Human GeneticsUniversity Hospital HeidelbergHeidelbergGermany
| | - Dirk J. Lefeber
- Department of NeurologyDonders Institute for BrainCognition and BehaviourRadboud University Medical CenterNijmegenthe Netherlands,Department of Laboratory MedicineTranslational Metabolic LaboratoryRadboud Institute for Molecular Life SciencesRadboud University Medical CenterNijmegenthe Netherlands
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10
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Sánchez-Caballero L, Elurbe DM, Baertling F, Guerrero-Castillo S, van den Brand M, van Strien J, van Dam TJP, Rodenburg R, Brandt U, Huynen MA, Nijtmans LGJ. TMEM70 functions in the assembly of complexes I and V. Biochim Biophys Acta Bioenerg 2020; 1861:148202. [PMID: 32275929 DOI: 10.1016/j.bbabio.2020.148202] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 03/19/2020] [Accepted: 04/02/2020] [Indexed: 10/24/2022]
Abstract
Protein complexes from the oxidative phosphorylation (OXPHOS) system are assembled with the help of proteins called assembly factors. We here delineate the function of the inner mitochondrial membrane protein TMEM70, in which mutations have been linked to OXPHOS deficiencies, using a combination of BioID, complexome profiling and coevolution analyses. TMEM70 interacts with complex I and V and for both complexes the loss of TMEM70 results in the accumulation of an assembly intermediate followed by a reduction of the next assembly intermediate in the pathway. This indicates that TMEM70 has a role in the stability of membrane-bound subassemblies or in the membrane recruitment of subunits into the forming complex. Independent evidence for a role of TMEM70 in OXPHOS assembly comes from evolutionary analyses. The TMEM70/TMEM186/TMEM223 protein family, of which we show that TMEM186 and TMEM223 are mitochondrial in human as well, only occurs in species with OXPHOS complexes. Our results validate the use of combining complexome profiling with BioID and evolutionary analyses in elucidating congenital defects in protein complex assembly.
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Affiliation(s)
- Laura Sánchez-Caballero
- Department of Paediatrics, Radboud Centre for Mitochondrial Medicine, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Dei M Elurbe
- Centre for Molecular and Biomolecular Informatics, Radboud Institute for Molecular Life Sciences, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Fabian Baertling
- Department of Paediatrics, Radboud Centre for Mitochondrial Medicine, Radboud University Medical Centre, Nijmegen, the Netherlands; Department of General Paediatrics, Neonatology and Paediatric Cardiology, University Children's Hospital Düsseldorf, Heinrich Heine University, Düsseldorf, Germany
| | - Sergio Guerrero-Castillo
- Department of Paediatrics, Radboud Centre for Mitochondrial Medicine, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Mariel van den Brand
- Department of Paediatrics, Radboud Centre for Mitochondrial Medicine, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Joeri van Strien
- Centre for Molecular and Biomolecular Informatics, Radboud Institute for Molecular Life Sciences, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Teunis J P van Dam
- Theoretical Biology and Bioinformatics, Department of Biology, Utrecht University, Utrecht, the Netherlands
| | - Richard Rodenburg
- Department of Paediatrics, Radboud Centre for Mitochondrial Medicine, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Ulrich Brandt
- Department of Paediatrics, Radboud Centre for Mitochondrial Medicine, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Martijn A Huynen
- Centre for Molecular and Biomolecular Informatics, Radboud Institute for Molecular Life Sciences, Radboud University Medical Centre, Nijmegen, the Netherlands.
| | - Leo G J Nijtmans
- Department of Paediatrics, Radboud Centre for Mitochondrial Medicine, Radboud University Medical Centre, Nijmegen, the Netherlands
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11
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Schoenaker R, Kamsteeg E, Rodenburg R, Van Engelen B, Jansen M, Saris C. P.63Chronic progressive external ophthalmoplegia (CPEO) and CPEO-plus cohort of 54 patients from the Netherlands. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Barbosa-Gouveia S, González-Vioque E, Borges F, Gutiérrez-Solana L, Wintjes L, Kappen A, van den Heuvel L, Leis R, Rodenburg R, Couce ML. Identification and Characterization of New Variants in FOXRED1 Gene Expands the Clinical Spectrum Associated with Mitochondrial Complex I Deficiency. J Clin Med 2019; 8:jcm8081262. [PMID: 31434271 PMCID: PMC6723710 DOI: 10.3390/jcm8081262] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 08/09/2019] [Accepted: 08/15/2019] [Indexed: 11/16/2022] Open
Abstract
Complex I (nicotinamide adenine dinucleotide (NADH): ubiquinone oxidoreductase) is the largest complex of the mitochondrial oxidative phosphorylation system (OXPHOS) system. Forty-four subunits encoded in nuclear and mitochondrial genomes compose this multiprotein complex, its assembly being a highly complex process involving at least 15 additional nuclear encoded assembly factors. Complex I deficiency is a mitochondrial disorder usually associated with early-onset severe multisystem disorders characterized by highly variable clinical manifestations. Flavin adenine dinucleotide (FAD)-dependent oxidoreductase domain-containing protein 1 (FOXRED1) is a complex I assembly factor. To date, only five patients with mitochondrial complex I deficiency due to mutations in FOXRED1 have been characterized. Here, we describe a child with ataxia, epilepsy and psychomotor developmental delay carrying two heterozygous FOXRED1 variants, c.920G>A (p.Gly307Glu) and c.733+1G>A. We demonstrate the molecular mechanism supporting the pathogenicity of the FOXRED1 variants, showing a clear deficiency of complex I activity. The reduction in the steady-state level of complex I holoenzyme in patient fibroblasts, confirmed the pathogenicity of the variants and showed the molecular mechanism behind their pathogenicity. A comparison of the clinical presentation of the index case with the previously described cases allowed deepening our knowledge about the clinical variability associated with FOXRED1 defects.
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Affiliation(s)
- Sofia Barbosa-Gouveia
- Diagnosis and Treatment of Congenital Metabolic Diseases Unit (UDyTEMC), Department of Pediatrics, Clinical University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain.
- Faculty of Medicine, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain.
- IDIS-Health Research Institute of Santiago de Compostela, 15706 Santiago de Compostela, Spain.
| | - Emiliano González-Vioque
- Diagnosis and Treatment of Congenital Metabolic Diseases Unit (UDyTEMC), Department of Pediatrics, Clinical University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain
- IDIS-Health Research Institute of Santiago de Compostela, 15706 Santiago de Compostela, Spain
| | - Filipa Borges
- Diagnosis and Treatment of Congenital Metabolic Diseases Unit (UDyTEMC), Department of Pediatrics, Clinical University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain
| | - Luis Gutiérrez-Solana
- Unit of Child Neurology, Department of Pediatrics, Hospital Infantil Universitario Niño Jesús de Madrid, 28009 Madrid, Spain
| | - Liesbeth Wintjes
- Department of Paediatrics, Radboud Centre for Mitochondrial Medicine, Radboud University Medical Centre, 6525 GA Nijmegen, The Netherlands
| | - Antonia Kappen
- Department of Paediatrics, Radboud Centre for Mitochondrial Medicine, Radboud University Medical Centre, 6525 GA Nijmegen, The Netherlands
| | - Lambert van den Heuvel
- Department of Paediatrics, Radboud Centre for Mitochondrial Medicine, Radboud University Medical Centre, 6525 GA Nijmegen, The Netherlands
| | - Rosaura Leis
- IDIS-Health Research Institute of Santiago de Compostela, 15706 Santiago de Compostela, Spain
- Unit of Pediatric Gastroenterology and Nutrition Department of Pediatrics, Hospital Clínico Universitario de Santiago de Compostela, 15706 Santiago de Compostela, Spain
- CIBER Fisiopatología Obesidad y Nutrición (CIBEROBN), Instituto Salud Carlos III, 28029 Madrid, Spain
| | - Richard Rodenburg
- Department of Paediatrics, Radboud Centre for Mitochondrial Medicine, Radboud University Medical Centre, 6525 GA Nijmegen, The Netherlands
| | - María Luz Couce
- Diagnosis and Treatment of Congenital Metabolic Diseases Unit (UDyTEMC), Department of Pediatrics, Clinical University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain
- Faculty of Medicine, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain
- IDIS-Health Research Institute of Santiago de Compostela, 15706 Santiago de Compostela, Spain
- CIBERER, Pabellón 11, 28029 Madrid, Spain
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13
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Chinopoulos C, Batzios S, van den Heuvel LP, Rodenburg R, Smeets R, Waterham HR, Turkenburg M, Ruiter JP, Wanders RJA, Doczi J, Horvath G, Dobolyi A, Vargiami E, Wevers RA, Zafeiriou D. Mutated SUCLG1 causes mislocalization of SUCLG2 protein, morphological alterations of mitochondria and an early-onset severe neurometabolic disorder. Mol Genet Metab 2019; 126:43-52. [PMID: 30470562 DOI: 10.1016/j.ymgme.2018.11.009] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 11/14/2018] [Accepted: 11/14/2018] [Indexed: 11/19/2022]
Abstract
Succinate-CoA ligase (SUCL) is a heterodimer consisting of an alpha subunit encoded by SUCLG1, and a beta subunit encoded by either SUCLA2 or SUCLG2 catalyzing an ATP- or GTP-forming reaction, respectively, in the mitochondrial matrix. The deficiency of this enzyme represents an encephalomyopathic form of mtDNA depletion syndromes. We describe the fatal clinical course of a female patient with a pathogenic mutation in SUCLG1 (c.626C > A, p.Ala209Glu) heterozygous at the genomic DNA level, but homozygous at the transcriptional level. The patient exhibited early-onset neurometabolic abnormality culminating in severe brain atrophy and dystonia leading to death by the age of 3.5 years. Urine and plasma metabolite profiling was consistent with SUCL deficiency which was confirmed by enzyme analysis and lack of mitochondrial substrate-level phosphorylation (mSLP) in skin fibroblasts. Oxygen consumption- but not extracellular acidification rates were altered only when using glutamine as a substrate, and this was associated with mild mtDNA depletion and no changes in ETC activities. Immunoblot analysis revealed no detectable levels of SUCLG1, while SUCLA2 and SUCLG2 protein expressions were largely reduced. Confocal imaging of triple immunocytochemistry of skin fibroblasts showed that SUCLG2 co-localized only partially with the mitochondrial network which otherwise exhibited an increase in fragmentation compared to control cells. Our results outline the catastrophic consequences of the mutated SUCLG1 leading to strongly reduced SUCL activity, mSLP impairment, mislocalization of SUCLG2, morphological alterations in mitochondria and clinically to a severe neurometabolic disease, but in the absence of changes in mtDNA levels or respiratory complex activities.
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Affiliation(s)
| | - Spyros Batzios
- 1st Department of Pediatrics, "Hippokratio" General Hospital, Aristotle University, Thessaloniki, Greece; Department of Paediatric Metabolic Medicine, Great Ormond Street Hospital, London, UK
| | - Lambertus P van den Heuvel
- Department of Pediatrics, Radboud University Medical Centre, Nijmegen, The Netherlands; Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Richard Rodenburg
- Department of Pediatrics, Radboud University Medical Centre, Nijmegen, The Netherlands; Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Roel Smeets
- Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Hans R Waterham
- Laboratory Genetic Metabolic Diseases, Amsterdam University Medical Centers, University of Amsterdam, The Netherlands
| | - Marjolein Turkenburg
- Laboratory Genetic Metabolic Diseases, Amsterdam University Medical Centers, University of Amsterdam, The Netherlands
| | - Jos P Ruiter
- Laboratory Genetic Metabolic Diseases, Amsterdam University Medical Centers, University of Amsterdam, The Netherlands
| | - Ronald J A Wanders
- Laboratory Genetic Metabolic Diseases, Amsterdam University Medical Centers, University of Amsterdam, The Netherlands
| | - Judit Doczi
- Department of Medical Biochemistry, Semmelweis University, Budapest, Hungary
| | - Gergo Horvath
- Department of Medical Biochemistry, Semmelweis University, Budapest, Hungary
| | - Arpad Dobolyi
- MTA-ELTE Laboratory of Molecular and Systems Neurobiology, Department of Physiology and Neurobiology, Hungarian Academy of Sciences, Eotvos Lorand University, Budapest, Hungary; Department of Anatomy, Histology and Embryology, Semmelweis University, Budapest, Hungary
| | - Euthymia Vargiami
- 1st Department of Pediatrics, "Hippokratio" General Hospital, Aristotle University, Thessaloniki, Greece
| | - Ron A Wevers
- Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands.
| | - Dimitrios Zafeiriou
- 1st Department of Pediatrics, "Hippokratio" General Hospital, Aristotle University, Thessaloniki, Greece.
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14
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Ashikov A, Abu Bakar N, Wen XY, Niemeijer M, Rodrigues Pinto Osorio G, Brand-Arzamendi K, Hasadsri L, Hansikova H, Raymond K, Vicogne D, Ondruskova N, Simon MEH, Pfundt R, Timal S, Beumers R, Biot C, Smeets R, Kersten M, Huijben K, Linders PTA, van den Bogaart G, van Hijum SAFT, Rodenburg R, van den Heuvel LP, van Spronsen F, Honzik T, Foulquier F, van Scherpenzeel M, Lefeber DJ, Mirjam W, Han B, Helen M, Helen M, Peter VH, Jiddeke VDK, Diego M, Lars M, Katja BH, Jozef H, Majid A, Kevin C, Johann TWN. Integrating glycomics and genomics uncovers SLC10A7 as essential factor for bone mineralization by regulating post-Golgi protein transport and glycosylation. Hum Mol Genet 2018; 27:3029-3045. [DOI: 10.1093/hmg/ddy213] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 05/29/2018] [Indexed: 01/13/2023] Open
Affiliation(s)
- Angel Ashikov
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
- Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Nurulamin Abu Bakar
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
- Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Xiao-Yan Wen
- Zebrafish Centre for Advanced Drug Discovery & Keenan Research Centre for Biomedical Science, Li Ka Shing Knowledge Institute, St Michael’s Hospital, Toronto, ON, Canada
- Department of Medicine, Physiology & Institute of Medical Science, Faculty of Medicine, University of Toronto, ON, Canada
| | - Marco Niemeijer
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Glentino Rodrigues Pinto Osorio
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Koroboshka Brand-Arzamendi
- Zebrafish Centre for Advanced Drug Discovery & Keenan Research Centre for Biomedical Science, Li Ka Shing Knowledge Institute, St Michael’s Hospital, Toronto, ON, Canada
- Department of Medicine, Physiology & Institute of Medical Science, Faculty of Medicine, University of Toronto, ON, Canada
| | - Linda Hasadsri
- Division of Laboratory Genetics, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Hana Hansikova
- Department of Pediatrics and Adolescent Medicine, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Kimiyo Raymond
- Division of Laboratory Genetics, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Dorothée Vicogne
- CNRS-UMR 8576, Structural and Functional Glycobiology Unit, FRABIO, University of Lille, 59655 Villeneuve d’Ascq, France
| | - Nina Ondruskova
- Department of Pediatrics and Adolescent Medicine, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Marleen E H Simon
- Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Rolph Pfundt
- Department of Human Genetics, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Sharita Timal
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
- Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Roel Beumers
- Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Christophe Biot
- CNRS-UMR 8576, Structural and Functional Glycobiology Unit, FRABIO, University of Lille, 59655 Villeneuve d’Ascq, France
| | - Roel Smeets
- Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Marjan Kersten
- Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Karin Huijben
- Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Peter T A Linders
- Department of Tumor Immunology, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Geert van den Bogaart
- Department of Tumor Immunology, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Sacha A F T van Hijum
- Center for Molecular and Biomolecular Informatics, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
- NIZO, 6710 BA Ede, The Netherlands
| | - Richard Rodenburg
- Radboud Center for Mitochondrial Disorders, Translational Metabolic Laboratory, Department of Pediatrics, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | | | - Francjan van Spronsen
- Division of Metabolic Diseases, Beatrix Children’s Hospital, University Medical Center Groningen, PO BOX 30.001, 9700 RB Groningen, The Netherlands
| | - Tomas Honzik
- Department of Pediatrics and Adolescent Medicine, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Francois Foulquier
- CNRS-UMR 8576, Structural and Functional Glycobiology Unit, FRABIO, University of Lille, 59655 Villeneuve d’Ascq, France
| | - Monique van Scherpenzeel
- Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Dirk J Lefeber
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
- Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Wamelink Mirjam
- Department of Clinical Chemistry, VU University Medical Center, Amsterdam, The Netherlands
| | - Brunner Han
- Department of Human Genetics, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Mundy Helen
- Centre for Inherited Metabolic Disease, Evelina Children's Hospital, Guys and St Thomas NHS Foundation Trust, London SE1 7EH, UK
| | - Michelakakis Helen
- Department of Enzymology and Cellular Function, Institute of Child Health, Athens, Greece
| | - van Hasselt Peter
- Department of Metabolic Diseases, University Medical Center Utrecht, Utrecht, The Netherlands
| | - van de Kamp Jiddeke
- Department of Clinical Genetics, VU University Medical Center, Amsterdam, The Netherlands
| | - Martinelli Diego
- Genetics and Rare Diseases Research Division, Bambino Gesù Children's Research Hospital, Rome, Italy
| | - Morkrid Lars
- Department of Medical Biochemistry, Oslo University Hospital, and Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | | | | | - Alfadhel Majid
- King Abdullah International Medical Research Centre, King Saud bin Abdul Aziz University for Health Sciences, Division of Genetics, Department of Pediatrics, King Abdullah Specialized Children Hospital, King Abdul Aziz Medical City, Ministry of National Guard-Health Affairs (NGHA), Riyadh, Saudi Arabia
| | - Carpenter Kevin
- NSW Biochemical Genetics Service, The Children's Hospital at Westmead, Disciplines of Genetic Medicine & Child and Adolescent Health, The University of Sydney, NSW 2145, Australia
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15
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Hallas T, Eisen B, Shemer Y, Ben Jehuda R, Mekies LN, Naor S, Schick R, Eliyahu S, Reiter I, Vlodavsky E, Katz YS, Õunap K, Lorber A, Rodenburg R, Mandel H, Gherghiceanu M, Binah O. Investigating the cardiac pathology of SCO2-mediated hypertrophic cardiomyopathy using patients induced pluripotent stem cell-derived cardiomyocytes. J Cell Mol Med 2017; 22:913-925. [PMID: 29193756 PMCID: PMC5783844 DOI: 10.1111/jcmm.13392] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 08/11/2017] [Indexed: 01/13/2023] Open
Abstract
Mutations in SCO2 are among the most common causes of COX deficiency, resulting in reduced mitochondrial oxidative ATP production capacity, often leading to hypertrophic cardiomyopathy (HCM). To date, none of the recent pertaining reports provide deep understanding of the SCO2 disease pathophysiology. To investigate the cardiac pathology of the disease, we were the first to generate induced pluripotent stem cell (iPSC)-derived cardiomyocytes (iPSC-CMs) from SCO2-mutated patients. For iPSC generation, we reprogrammed skin fibroblasts from two SCO2 patients and healthy controls. The first patient was a compound heterozygote to the common E140K mutation, and the second was homozygote for the less common G193S mutation. iPSC were differentiated into cardiomyocytes through embryoid body (EB) formation. To test the hypothesis that the SCO2 mutation is associated with mitochondrial abnormalities, and intracellular Ca2+ -overload resulting in functional derangements and arrhythmias, we investigated in SCO2-mutated iPSC-CMs (compared to control cardiomyocytes): (i) the ultrastructural changes; (ii) the inotropic responsiveness to β-adrenergic stimulation, increased [Ca2+ ]o and angiotensin-II (AT-II); and (iii) the Beat Rate Variability (BRV) characteristics. In support of the hypothesis, we found in the mutated iPSC-CMs major ultrastructural abnormalities and markedly attenuated response to the inotropic interventions and caffeine, as well as delayed afterdepolarizations (DADs) and increased BRV, suggesting impaired SR Ca2+ handling due to attenuated SERCA activity caused by ATP shortage. Our novel results show that iPSC-CMs are useful for investigating the pathophysiological mechanisms underlying the SCO2 mutation syndrome.
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Affiliation(s)
- Tova Hallas
- Department of Physiology, Biophysics and Systems Biology, Technion, Haifa, Israel.,The Rappaport Institute, Technion, Haifa, Israel.,Rappaport Faculty of Medicine, Technion, Haifa, Israel
| | - Binyamin Eisen
- Department of Physiology, Biophysics and Systems Biology, Technion, Haifa, Israel.,The Rappaport Institute, Technion, Haifa, Israel.,Rappaport Faculty of Medicine, Technion, Haifa, Israel
| | - Yuval Shemer
- Department of Physiology, Biophysics and Systems Biology, Technion, Haifa, Israel.,The Rappaport Institute, Technion, Haifa, Israel.,Rappaport Faculty of Medicine, Technion, Haifa, Israel
| | - Ronen Ben Jehuda
- Department of Physiology, Biophysics and Systems Biology, Technion, Haifa, Israel.,The Rappaport Institute, Technion, Haifa, Israel.,Rappaport Faculty of Medicine, Technion, Haifa, Israel.,Department of Biotechnology, Technion, Haifa, Israel
| | - Lucy N Mekies
- Department of Physiology, Biophysics and Systems Biology, Technion, Haifa, Israel.,The Rappaport Institute, Technion, Haifa, Israel.,Rappaport Faculty of Medicine, Technion, Haifa, Israel
| | - Shulamit Naor
- Department of Physiology, Biophysics and Systems Biology, Technion, Haifa, Israel.,The Rappaport Institute, Technion, Haifa, Israel.,Rappaport Faculty of Medicine, Technion, Haifa, Israel
| | - Revital Schick
- Department of Physiology, Biophysics and Systems Biology, Technion, Haifa, Israel.,The Rappaport Institute, Technion, Haifa, Israel.,Rappaport Faculty of Medicine, Technion, Haifa, Israel
| | - Sivan Eliyahu
- Department of Physiology, Biophysics and Systems Biology, Technion, Haifa, Israel.,The Rappaport Institute, Technion, Haifa, Israel.,Rappaport Faculty of Medicine, Technion, Haifa, Israel
| | - Irina Reiter
- Department of Physiology, Biophysics and Systems Biology, Technion, Haifa, Israel.,The Rappaport Institute, Technion, Haifa, Israel.,Rappaport Faculty of Medicine, Technion, Haifa, Israel
| | - Eugene Vlodavsky
- Department of Pathology, Rambam Health Care Campus, Haifa, Israel
| | - Yeshayahu Shai Katz
- Rappaport Faculty of Medicine, Technion, Haifa, Israel.,Department of Anesthesiology, Rambam Health Care Campus, Haifa, Israel
| | - Katrin Õunap
- Department of Genetics, United Laboratories, Tartu University Hospital, Tartu, Estonia.,Department of Pediatrics, Institute of Clinical Medicine, University of Tartu, Tartu, Estonia
| | - Avraham Lorber
- Rappaport Faculty of Medicine, Technion, Haifa, Israel.,Department of Pediatric Cardiology, Rambam Health Care Campus, Haifa, Israel
| | - Richard Rodenburg
- Radboud Center for Mitochondrial Disorders, Translational Metabolic Laboratory, Department of Pediatrics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Hanna Mandel
- Rappaport Faculty of Medicine, Technion, Haifa, Israel.,Metabolic Unit, Department of Pediatrics, Rambam Health Care Campus, Haifa, Israel
| | | | - Ofer Binah
- Department of Physiology, Biophysics and Systems Biology, Technion, Haifa, Israel.,The Rappaport Institute, Technion, Haifa, Israel.,Rappaport Faculty of Medicine, Technion, Haifa, Israel
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16
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Wortmann SB, Chen MA, Colombo R, Pontoglio A, Alhaddad B, Botto LD, Yuzyuk T, Coughlin CR, Descartes M, Grűnewald S, Maranda B, Mills PB, Pitt J, Potente C, Rodenburg R, Kluijtmans LAJ, Sampath S, Pai EF, Wevers RA, Tiller GE. Mild orotic aciduria in UMPS heterozygotes: a metabolic finding without clinical consequences. J Inherit Metab Dis 2017; 40:423-431. [PMID: 28205048 PMCID: PMC5393157 DOI: 10.1007/s10545-017-0015-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 01/05/2017] [Accepted: 01/09/2017] [Indexed: 12/04/2022]
Abstract
BACKGROUND Elevated urinary excretion of orotic acid is associated with treatable disorders of the urea cycle and pyrimidine metabolism. Establishing the correct and timely diagnosis in a patient with orotic aciduria is key to effective treatment. Uridine monophosphate synthase is involved in de novo pyrimidine synthesis. Uridine monophosphate synthase deficiency (or hereditary orotic aciduria), due to biallelic mutations in UMPS, is a rare condition presenting with megaloblastic anemia in the first months of life. If not treated with the pyrimidine precursor uridine, neutropenia, failure to thrive, growth retardation, developmental delay, and intellectual disability may ensue. METHODS AND RESULTS We identified mild and isolated orotic aciduria in 11 unrelated individuals with diverse clinical signs and symptoms, the most common denominator being intellectual disability/developmental delay. Of note, none had blood count abnormalities, relevant hyperammonemia or altered plasma amino acid profile. All individuals were found to have heterozygous alterations in UMPS. Four of these variants were predicted to be null alleles with complete loss of function. The remaining variants were missense changes and predicted to be damaging to the normal encoded protein. Interestingly, family screening revealed heterozygous UMPS variants in combination with mild orotic aciduria in 19 clinically asymptomatic family members. CONCLUSIONS We therefore conclude that heterozygous UMPS-mutations can lead to mild and isolated orotic aciduria without clinical consequence. Partial UMPS-deficiency should be included in the differential diagnosis of mild orotic aciduria. The discovery of heterozygotes manifesting clinical symptoms such as hypotonia and developmental delay are likely due to ascertainment bias.
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Affiliation(s)
- Saskia B Wortmann
- Department of Pediatrics, Salzburger Landeskliniken (SALK) and Paracelsus Medical University (PMU), Mullner Hauptstrasse 48, 5020, Salzburg, Austria.
- Institute of Human Genetics, Helmholtz Zentrum Munich, Neuherberg, Germany.
- Institute of Human Genetics, Technical University Munich, Munich, Germany.
| | | | - Roberto Colombo
- Institute of Clinical Biochemistry, Faculty of Medicine, Catholic University of the Sacred Heart, Rome, Italy
| | - Alessandro Pontoglio
- Center for the Study of Rare Hereditary Diseases, Niguarda Ca' Granda Metropolitan Hospital, Milan, Italy
| | - Bader Alhaddad
- Institute of Human Genetics, Technical University Munich, Munich, Germany
| | - Lorenzo D Botto
- Department of Genetics, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Tatiana Yuzyuk
- Department of Pathology, University of Utah, Salt Lake City, UT, USA
- ARUP Laboratories, Salt Lake City, UT, USA
| | - Curtis R Coughlin
- Department of Pediatrics, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, USA
| | - Maria Descartes
- Departments of Genetics and Pediatrics, University of Alabama School of Medicine, Birmingham, AL, USA
| | - Stephanie Grűnewald
- Metabolic Medicine Department, Great Ormond Street Hospital for Children NHS Foundation Trust, and UCL Institute of Child Health, London, UK
| | - Bruno Maranda
- CHUS Genetic Services, University of Sherbrooke, Sherbrooke, QC, Canada
| | - Philippa B Mills
- Genetics and Genomic Medicine Programme, UCL Great Ormond Street Institute of Child Health, London, UK
| | - James Pitt
- Victorian Clinical Genetics Services, Murdoch Childrens Research Institute, Royal Children's Hospital, Parkville, Australia
- Department of Paediatrics, University of Melbourne, Parkville, Australia
| | | | - Richard Rodenburg
- Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Leo A J Kluijtmans
- Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | | | - Emil F Pai
- Princess Margaret Cancer Centre, and Departments of Biochemistry, Medical Biophysics, and Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Ron A Wevers
- Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - George E Tiller
- Department of Genetics, Kaiser Permanente, Los Angeles, CA, USA
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17
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Barøy T, Pedurupillay CRJ, Bliksrud YT, Rasmussen M, Holmgren A, Vigeland MD, Hughes T, Brink M, Rodenburg R, Nedregaard B, Strømme P, Frengen E, Misceo D. A novel mutation in FBXL4 in a Norwegian child with encephalomyopathic mitochondrial DNA depletion syndrome 13. Eur J Med Genet 2016; 59:342-6. [DOI: 10.1016/j.ejmg.2016.05.005] [Citation(s) in RCA: 12] [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: 08/14/2015] [Revised: 04/27/2016] [Accepted: 05/09/2016] [Indexed: 10/21/2022]
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18
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Verhaak C, de Laat P, Koene S, Tibosch M, Rodenburg R, de Groot I, Knoop H, Janssen M, Smeitink J. Quality of life, fatigue and mental health in patients with the m.3243A > G mutation and its correlates with genetic characteristics and disease manifestation. Orphanet J Rare Dis 2016; 11:25. [PMID: 26988355 PMCID: PMC4797235 DOI: 10.1186/s13023-016-0403-5] [Citation(s) in RCA: 14] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 02/16/2016] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Mitochondrial disorders belong to the most prevalent inherited metabolic diseases with the m.3243A > G mutation reflecting being one of the most common mutations in mitochondrial DNA. Previous studies showed little relationship between mitochondrial genetics and disease manifestation. Relationship between genotype and disease manifestation with patient reported quality of life and other patient reported outcomes is still unexplored. METHODS Seventy-two out of the 122 invited adult patients with m.3243A > G mutation completed online standardized questionnaires on quality of life, functional impairment, fatigue and mental health as assessed by the RAND-SF36, the Sickness Impact Profile (SIP), the Checklist Individual Strength (CIS) and the Hospital Anxiety and Depression scale (HADS). Data were related to clinical manifestation reflected by the Newcastle Mitochondrial Disease Adult Scale (NMDAS) score and heteroplasmy levels of the mutation in urine epithelial cells. RESULTS Patients reported impaired quality of life. Sixty percent showed severe levels of fatigue, and 37% showed clinical relevant mental health problems, which was significantly more than healthy norms. These patient reported health outcomes showed negligible relationship with levels of heteroplasmy (r = <.30) and weak (.30 < r < .50) to moderate (.50 < r < .70) relationship with clinical manifestation. CONCLUSIONS Patient reported outcomes on quality of life, fatigue and mental health problems, are only partly reflected by clinical assessments. In order to support patients more effectively, integration of patient reported outcomes, alongside symptoms of their disease, in clinical practice is warranted.
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Affiliation(s)
- Christianne Verhaak
- Department of Medical Psychology, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands.
| | - Paul de Laat
- Department of Pediatrics, Radboud Center for Mitochondrial Medicine, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Saskia Koene
- Department of Pediatrics, Radboud Center for Mitochondrial Medicine, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Marijke Tibosch
- Department of Medical Psychology, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Richard Rodenburg
- Department of Pediatrics, Radboud Center for Mitochondrial Medicine, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Imelda de Groot
- Department of rehabilitation, Radboud Center for Mitochondrial Medicine, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Hans Knoop
- Department of Medical Psychology, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Mirian Janssen
- Department of Internal Medicine; Radboud Center for Mitochondrial Medicine, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Jan Smeitink
- Department of Pediatrics, Radboud Center for Mitochondrial Medicine, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
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Emmerzaal T, Geenen B, Scott K, Graham B, Craigen W, Ge M, Morava E, Rodenburg R, Kozicz T. Suboptimal mitochondrial function in depression. Mitochondrion 2015. [DOI: 10.1016/j.mito.2015.07.079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Koene S, Rodenburg R, Peters G, de Groot I, Verhaak C, Kapusta L, Smeitink J, Morava E. Muscle pain, fatigue and night hypothermia in association with mitochondrial dysfunction. J Pediatr Neurol 2015. [DOI: 10.3233/jpn-2009-0336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Saskia Koene
- Department of Pediatrics, Nijmegen Centre for Mitochondrial Disorders, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Richard Rodenburg
- Department of Pediatrics, Nijmegen Centre for Mitochondrial Disorders, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Gera Peters
- Department of Pediatric Physiotherapy, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Imelda de Groot
- Department of Pediatric Revalidation, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Chris Verhaak
- Department of Pediatric Psychology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Livia Kapusta
- Department of Pediatric Cardiology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Jan Smeitink
- Department of Pediatrics, Nijmegen Centre for Mitochondrial Disorders, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Eva Morava
- Department of Pediatrics, Nijmegen Centre for Mitochondrial Disorders, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
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21
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Franik S, Huidekoper HH, Visser G, de Vries M, de Boer L, Hermans-Peters M, Rodenburg R, Verhaak C, Vlieger AM, Smeitink JAM, Janssen MCH, Wortmann SB. High prevalence of complementary and alternative medicine use in patients with genetically proven mitochondrial disorders. J Inherit Metab Dis 2015; 38:477-82. [PMID: 25303853 DOI: 10.1007/s10545-014-9773-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 09/10/2014] [Accepted: 09/16/2014] [Indexed: 11/28/2022]
Abstract
Despite major advances in understanding the pathophysiology of mitochondrial diseases, clinical management of these conditions remains largely supportive, and no effective treatment is available. We therefore assumed that the burden of disease combined with the lack of adequate treatment leaves open a big market for complementary and alternative medicine use. The objective of this study was to evaluate the use and perceived effectiveness of complementary and alternative medicine in children and adults with genetically proven mitochondrial disease. The reported use was surprisingly high, with 88% of children and 91% of adults having used some kind of complementary and alternative medicine in the last 2 years. Also, the mean cost of these treatments was impressive, being <euro>489/year for children and <euro>359/year for adult patients. Over-the-counter remedies (e.g., food supplements, homeopathy) and self-help techniques (e.g., Reiki, yoga) were the most frequently used complementary and alternative therapies in our cohort: 54% of children and 60% of adults reported the various complementary and alternative medicine therapies to be effective. Given the fact that currently no effective treatment exists, further research toward the different therapies is needed, as our study clearly demonstrates that such therapies are highly sought after by affected patients.
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Affiliation(s)
- Sebastian Franik
- Nijmegen Centre for Mitochondrial Disorders (NCMD) at the Amalia Children's Hospital, Radboudumc, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
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22
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Akintola AA, Jansen SW, Wilde RBP, Hultzer G, Rodenburg R, van Heemst D. A simple and versatile method for frequent 24 h blood sample collection in healthy older adults. MethodsX 2014; 2:33-8. [PMID: 26150969 PMCID: PMC4487324 DOI: 10.1016/j.mex.2014.12.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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: 09/25/2014] [Accepted: 12/24/2014] [Indexed: 11/30/2022] Open
Abstract
Repeated 24 h blood sampling, which is required for time series analyses of metabolites and/or hormones that show strong fluctuations in blood concentration over time, has a higher failure rate in older adults. We tailored existing venipuncture protocols toward use for 24 h blood sampling (sampling frequency of 10 min) in older adults. The following modifications were made: •Pre-sampling: evidence based risk assessment of older adults.•During sampling:•Ultrasound-guided identification and characterisation of veins.•Use of 20-gauge arterial catheter with guide wire for venous access.•Measures to prevent and/or reduce unidirectional blood flow (fluid flow into but not out of the vein) included:•Use of hot water bottles to dilate veins.•Use of small gauge syringes, shortening of the extension line, and slowing of the blood withdrawal rate to reduce pressure on veins.•Stimulation of movement of the arm or retraction of the IV cannula to relieve mechanical flow obstruction.•Post-sampling: prevention of bruising and prolonged bleeding.
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Affiliation(s)
- A A Akintola
- Department of Gerontology and Geriatrics, Leiden University Medical Centre, Leiden, The Netherlands
| | - S W Jansen
- Department of Gerontology and Geriatrics, Leiden University Medical Centre, Leiden, The Netherlands
| | - R B P Wilde
- Intensive Care Department, Leiden University Medical Centre, Leiden, The Netherlands
| | - G Hultzer
- Department of Surgery, Leiden University Medical Centre, Leiden, The Netherlands
| | - R Rodenburg
- Department of Surgery, Leiden University Medical Centre, Leiden, The Netherlands
| | - D van Heemst
- Department of Gerontology and Geriatrics, Leiden University Medical Centre, Leiden, The Netherlands
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23
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Gai X, Ghezzi D, Johnson MA, Biagosch C, Shamseldin H, Tsukikawa M, Sheldon C, Srinivasan S, Haack T, Gorza M, Wieland T, Strom T, Polyak E, Place E, Consugar M, Ostrovsky J, Vidoni S, Reyes A, Wong LJ, Sondheimer N, Salih M, Al-Jishi E, Freisinger P, Furlan F, Lamperti C, Rodenburg R, Pierce E, Smeitink J, Prokisch H, Alkuraya F, Zeviani M, Falk MJ. FBXL4 is a mitochondria-localized protein in which autosomal recessive mutations cause multiple respiratory chain multisystem disease commonly involving cortical atrophy and leukodystrophy. Mitochondrion 2013. [DOI: 10.1016/j.mito.2013.07.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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Smits B, van den Heuvel L, Knoop H, Küsters B, Janssen A, Borm G, Bleijenberg G, Rodenburg R, van Engelen B. Mitochondrial enzymes discriminate between mitochondrial disorders and chronic fatigue syndrome. Mitochondrion 2011; 11:735-8. [PMID: 21664495 DOI: 10.1016/j.mito.2011.05.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Revised: 05/18/2011] [Accepted: 05/25/2011] [Indexed: 10/18/2022]
Abstract
We studied the extent of mitochondrial involvement in chronic fatigue syndrome (CFS) and investigated whether measurement of mitochondrial respiratory chain complex (RCC) activities discriminates between CFS and mitochondrial disorders. Mitochondrial content was decreased in CFS compared to healthy controls, whereas RCC activities corrected for mitochondrial content were not. Conversely, mitochondrial content did not discriminate between CFS and two groups of mitochondrial disorders, whereas ATP production rate and complex I, III and IV activity did, all with higher activities in CFS. We conclude that the ATP production rate and RCC activities can reliably discriminate between mitochondrial disorders and CFS.
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Affiliation(s)
- Bart Smits
- Neuromuscular Center Nijmegen, Department of Neurology, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands.
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25
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Joost K, Rodenburg R, Piirsoo A, van den Heuvel B, Zordania R, Ounap K. A novel mutation in the SCO2 gene in a neonate with early-onset cardioencephalomyopathy. Pediatr Neurol 2010; 42:227-30. [PMID: 20159436 DOI: 10.1016/j.pediatrneurol.2009.10.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2009] [Revised: 09/08/2009] [Accepted: 10/12/2009] [Indexed: 11/25/2022]
Abstract
Mutations in the SCO2 gene [SCO cytochrome oxidase deficient homolog 2 (yeast)] causing cytochrome c oxidase deficiency have been reported in at least in 26 patients with fatal infantile cardioencephalomyopathy. Mutation 1541G > A affecting protein stability is associated with the majority of cases, and the other 11 described mutations have more serious deleterious structural consequences for the protein product. Reported here is a novel case caused by compound heterozygosity of SCO2. The child presented at the age of 3 weeks with failure-to-thrive, muscular hypotonia, hypertrophic cardiomyopathy, and lactic acidemia. Leigh syndrome was diagnosed based on magnetic resonance imaging findings. Immunohistochemical and enzymatic investigations on muscle indicated totally absent cytochrome c oxidase activity. Both parents had mild mental retardation. Sequence analysis in the patient and in his parents revealed heterozygous mutation c.418G > A in exon 2 inherited from the father and maternally inherited heterozygous insertion of 19bp at position 17 in the coding region of the SCO2 gene. Respiratory chain enzyme activity measurements indicated normal activity in both parents, although the mother's cytochrome c oxidase activity was lower. This gene may be involved in the etiology of the mother's mental retardation.
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26
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Smits P, Mattijssen S, Morava E, van den Brand M, van den Brandt F, Wijburg F, Pruijn G, Smeitink J, Nijtmans L, Rodenburg R, van den Heuvel L. Functional consequences of mitochondrial tRNA Trp and tRNA Arg mutations causing combined OXPHOS defects. Eur J Hum Genet 2010; 18:324-9. [PMID: 19809478 PMCID: PMC2987211 DOI: 10.1038/ejhg.2009.169] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2009] [Revised: 07/16/2009] [Accepted: 08/11/2009] [Indexed: 11/09/2022] Open
Abstract
Combined oxidative phosphorylation (OXPHOS) system deficiencies are a group of mitochondrial disorders that are associated with a range of clinical phenotypes and genetic defects. They occur in approximately 30% of all OXPHOS disorders and around 4% are combined complex I, III and IV deficiencies. In this study we present two mutations in the mitochondrial tRNA(Trp) (MT-TW) and tRNA(Arg) (MT-TR) genes, m.5556G>A and m.10450A>G, respectively, which were detected in two unrelated patients showing combined OXPHOS complex I, III and IV deficiencies and progressive multisystemic diseases. Both mitochondrial tRNA mutations were almost homoplasmic in fibroblasts and muscle tissue of the two patients and not present in controls. Patient fibroblasts showed a general mitochondrial translation defect. The mutations resulted in lowered steady-state levels and altered conformations of the tRNAs. Cybrid cell lines showed similar tRNA defects and impairment of OXPHOS complex assembly as patient fibroblasts. Our results show that these tRNA(Trp) and tRNA(Arg) mutations cause the combined OXPHOS deficiencies in the patients, adding to the still expanding group of pathogenic mitochondrial tRNA mutations.
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MESH Headings
- Base Sequence
- Blotting, Northern
- Child, Preschool
- DNA Mutational Analysis
- DNA, Mitochondrial/genetics
- Electron Transport Complex I/metabolism
- Electrophoresis, Polyacrylamide Gel
- Fatal Outcome
- Female
- Fibroblasts/enzymology
- Fibroblasts/pathology
- Humans
- Infant
- Infant, Newborn
- Male
- Mitochondria/enzymology
- Mitochondria/genetics
- Mitochondrial Diseases/genetics
- Molecular Sequence Data
- Muscle, Skeletal/enzymology
- Muscle, Skeletal/pathology
- Mutation/genetics
- Nucleic Acid Conformation
- Pregnancy
- Protein Biosynthesis
- RNA, Transfer, Amino Acyl/chemistry
- RNA, Transfer, Amino Acyl/genetics
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Affiliation(s)
- Paulien Smits
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Sandy Mattijssen
- Department of Biomolecular Chemistry, Nijmegen Center for Molecular Life Sciences, Institute for Molecules and Materials, Radboud University Nijmegen, Nijmegen, The Netherlands
| | - Eva Morava
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Mariël van den Brand
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Frans van den Brandt
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Frits Wijburg
- Department of Pediatrics (G8-205), Emma Children's Hospital AMC, Academic Medical Center, Amsterdam, The Netherlands
| | - Ger Pruijn
- Department of Biomolecular Chemistry, Nijmegen Center for Molecular Life Sciences, Institute for Molecules and Materials, Radboud University Nijmegen, Nijmegen, The Netherlands
| | - Jan Smeitink
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Leo Nijtmans
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Richard Rodenburg
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Lambert van den Heuvel
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
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27
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Herzer M, Koch J, Prokisch H, Rodenburg R, Rauscher C, Radauer W, Forstner R, Pilz P, Rolinski B, Freisinger P, Mayr JA, Sperl W. Leigh disease with brainstem involvement in complex I deficiency due to assembly factor NDUFAF2 defect. Neuropediatrics 2010; 41:30-4. [PMID: 20571988 DOI: 10.1055/s-0030-1255062] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Mitochondrial NADH: ubiquinone oxidoreductase (complex I) deficiency accounts for most defects in mitochondrial oxidative phosphorylation. Pathogenic mutations have been described in all 7 mitochondrial and 12 of the 38 nuclear encoded subunits as well as in assembly factors by interfering with the building of the mature enzyme complex within the inner mitochondrial membrane. We now describe a male patient with a novel homozygous stop mutation in the NDUFAF2 gene. The boy presented with severe apnoea and nystagmus. MRI showed brainstem lesions without involvement of basal ganglia and thalamus, plasma lactate was normal or close to normal. He died after a fulminate course within 2 months after the first crisis. Neuropathology verified Leigh disease. We give a synopsis with other reported patients. Within the clinical spectrum of Leigh disease, patients with mutations in NDUFAF2 present with a distinct clinical pattern with predominantly brainstem involvement on MRI. The diagnosis should not be missed in spite of the normal lactate and lack of thalamus and basal ganglia changes on brain MRI.
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Affiliation(s)
- M Herzer
- Institute of Human Genetics, TU Munich and Helmholtz Zentrum Mü nchen,Munich, Germany
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28
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Jonckheere AI, Hogeveen M, Nijtmans L, van den Brand M, Janssen A, Diepstra H, van den Brandt F, van den Heuvel B, Hol F, Hofste T, Kapusta L, Dillmann U, Shamdeen M, Smeitink J, Smeitink J, Rodenburg R. A novel mitochondrial ATP8 gene mutation in a patient with apical hypertrophic cardiomyopathy and neuropathy. BMJ Case Rep 2009; 2009:bcr07.2008.0504. [PMID: 21686774 PMCID: PMC3027703 DOI: 10.1136/bcr.07.2008.0504] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
To identify the biochemical and molecular genetic defect in a 16-year-old patient presenting with apical hypertrophic cardiomyopathy and neuropathy suspected for a mitochondrial disorder.Measurement of the mitochondrial energy-generating system (MEGS) capacity in muscle and enzyme analysis in muscle and fibroblasts were performed. Relevant parts of the mitochondrial DNA were analysed by sequencing.A homoplasmic nonsense mutation m.8529G→A (p.Trp55X) was found in the mitochondrial ATP8 gene in the patient's fibroblasts and muscle tissue. Reduced complex V activity was measured in the patient's fibroblasts and muscle tissue, and was confirmed in cybrid clones containing patient-derived mitochondrial DNAWe describe the first pathogenic mutation in the mitochondrial ATP8 gene, resulting in an improper assembly and reduced activity of the complex V holoenzyme.
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Affiliation(s)
- An I Jonckheere
- Geert Grooteplein 10 PO Box 9101, 6500 HB Nijmegen, Netherlands
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29
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Jonckheere A, Hogeveen M, Nijtmans L, van den Brand M, Janssen A, Diepstra H, van den brandt F, van den Heuvel L, Hol F, Siers M, Smeitink J, Rodenburg R. 26 A novel mitochondrial ATP 8 (MT-ATP8) gene mutation in a patient with neuropathy and cardiomyopathy. Mitochondrion 2007. [DOI: 10.1016/j.mito.2007.08.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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30
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van de Glind G, de Vries M, Rodenburg R, Hol F, Smeitink J, Morava E. Resting muscle pain as the first clinical symptom in children carrying the MTTK A8344G mutation. Eur J Paediatr Neurol 2007; 11:243-6. [PMID: 17293137 DOI: 10.1016/j.ejpn.2007.01.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [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: 11/08/2006] [Revised: 01/04/2007] [Accepted: 01/05/2007] [Indexed: 11/28/2022]
Abstract
The characteristic clinical presentation, especially the appearance of muscle symptoms, is quite unique in children carrying the mtA8344G mutation. The diagnosis of MERRF syndrome is seldom made in the pediatric age. Fatigue is a common finding in children of pubertal age. Fatigue in combination with recurrent resting muscle pain occurs frequently in the initial phase of various hereditary muscle disorders and in several autoimmune, endocrine and metabolic syndromes. In the absence of obvious biochemical/metabolic abnormalities and in the lack of neurological symptoms the complaints are frequently labelled as fibromyalgia or chronic fatigue syndrome. In patients with behavioural or psychiatric abnormalities one might even start to question the organic etiology of the complaints. We describe a family carrying the classic MTTK mutation with a variable degree of heteroplasmy, presenting in childhood as isolated recurrent muscle pain as the first symptom of the disease.
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Affiliation(s)
- Gretha van de Glind
- Department of Pediatrics, Nijmegen Centre for Mitochondrial Disorders, Radboud University Nijmegen Medical Centre, 6500 HB Nijmegen, The Netherlands
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31
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Morava E, Bongers EMHF, Kress W, Sie L, Rodenburg R, Heuvel LVD, Brunner HG. Encephalomyopathy and optic atrophy with tall stature and mitochondrial dysfunction: a new syndrome. Clin Dysmorphol 2007; 16:131-134. [PMID: 17351361 DOI: 10.1097/mcd.0b013e328014715e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Eva Morava
- Departments of Pediatrics Human Genetics Child Neurology, Nijmegen Centre for Mitochondrial Disorders, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands Department of Human Genetics, University Biocenter Am Hubland, Wurzburg, Germany
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32
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Carrozzo R, Dionisi-Vici C, Steuerwald U, Lucioli S, Deodato F, Di Giandomenico S, Bertini E, Franke B, Kluijtmans LAJ, Meschini MC, Rizzo C, Piemonte F, Rodenburg R, Santer R, Santorelli FM, van Rooij A, Vermunt-de Koning D, Morava E, Wevers RA. SUCLA2 mutations are associated with mild methylmalonic aciduria, Leigh-like encephalomyopathy, dystonia and deafness. Brain 2007; 130:862-74. [PMID: 17301081 DOI: 10.1093/brain/awl389] [Citation(s) in RCA: 132] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
One pedigree with four patients has been recently described with mitochondrial DNA depletion and mutation in SUCLA2 gene leading to succinyl-CoA synthase deficiency. Patients had a Leigh-like encephalomyopathy and deafness but besides the presence of lactic acidosis, the profile of urine organic acid was not reported. We have studied 14 patients with mild 'unlabelled' methylmalonic aciduria (MMA) from 11 families. Eight of the families are from the Faroe Islands, having a common ancestor, and three are from southern Italy. Since the reaction catalysed by succinyl-CoA synthase in the tricarboxylic acid (TCA) cycle represents a distal step of the methylmalonic acid pathway, we investigated the SUCLA2 gene as a candidate gene in our patients. Genetic analysis of the gene in the 14 patients confirmed the defect in all patients and led to the identification of three novel mutations (p.Gly118Arg; p.Arg284Cys; c.534 + 1G --> A). The defect could be convincingly shown at the protein level and our data also confirm the previously described mitochondrial DNA depletion. Defects in SUCLA2 can be found at the metabolite level and are defined by mildly elevated methylmalonic acid and C4-dicarboxylic carnitine concentrations in body fluids in association with variable lactic acidosis. Clinically the diagnosis should be considered in patients with early/neonatal onset encephalomyopathy, dystonia, deafness and Leigh-like MRI abnormalities mainly affecting the putamen and the caudate nuclei. The frequency of the mutated allele in the Faroese population amounted to 2%, corresponding with an estimated homozygote frequency of 1 : 2500. Our data extend knowledge on the genetic defects causing MMA. Our patients present with an early infantile Leigh-like encephalomyopathy with deafness, and later on a progressive dystonia. Mild MMA, lactic acidosis and specific abnormalities in the carnitine ester profile are the biochemical hallmarks of the disease. In view of the frequency of the mutated allele on the Faroe Islands, measures become feasible to prevent the occurrence of the disease on the islands. We confirm and extend the findings on this inborn error of metabolism in the TCA cycle that must be carefully investigated by accurate metabolite analyses.
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Affiliation(s)
- Rosalba Carrozzo
- Unit of Molecular Medicine, Bambino Gesù Children's Hospital, Rome, Italy
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33
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Wortmann SB, Rodenburg R, Schwahn B, Smeitink JAM, Morava E. Distal joint contractures, mental retardation, characteristic face and growth retardation: Chitayat syndrome revisited. Genet Couns 2007; 18:119-23. [PMID: 17515308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We report on a patient with congenital distal limb contractures, characteristic face, prominent metopic sutures, narrow forehead, severe psychomotor and growth retardation, white matter lesions and failure to thrive. The child has many overlapping features with those reported previously by Chitayat. We suggest that the central nervous anomalies are responsible for the congenital contractures in Chitayat syndrome.
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Affiliation(s)
- S B Wortmann
- Radboud University Nijmegen Medical Centre, Nijmegen Centre for Mitochondrial Disorders, Department of Pediatrics, Nijmegen, The Netherlands
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Morava E, Hamel B, Hol F, Rodenburg R, Smeitink J. Mitochondrial dysfunction in Stüve-Wiedemann syndrome in a patient carrying an ND1 gene mutation. Am J Med Genet A 2006; 140:2248-50. [PMID: 16969869 DOI: 10.1002/ajmg.a.31452] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Eva Morava
- Department of Pediatrics, Nijmegen Centre for Mitochondrial Disorders, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
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Morava E, Rodenburg R, van Essen HZ, De Vries M, Smeitink J. Dietary intervention and oxidative phosphorylation capacity. J Inherit Metab Dis 2006; 29:589. [PMID: 16786255 DOI: 10.1007/s10545-006-0227-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [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: 09/02/2005] [Accepted: 02/07/2006] [Indexed: 10/24/2022]
Abstract
Secondary deterioration of mitochondrial function has been reported in patients with anorexia and cancer-related malnutrition. Inadequate nutrition, failure to thrive and feeding problems are also common symptoms in children with primary oxidative phosphorylation defects. As a standard intervention protocol we advise an age-appropriate diet and energy intake in our patients diagnosed with a mitochondrial dysfunction. By comparing the results of the first and the second samples from a group of children who underwent repeated muscle biopsies, we observed biochemical improvement in the mitochondrial function in 7 out of 10 patients following dietary advice and intervention. We suggest evaluating the nutritional state by interpretation of the skeletal muscle biochemistry in patients with a suspected oxidative phosphorylation defect. Since an insufficient dietary intake could play a role in secondary mitochondrial dysfunction, nutritional intervention should be performed prior to the biopsy. On the other hand, our data suggest that optimizing the nutritional and energy intake might also improve the utilization of the residual mitochondrial energy-generating capacity in patients with primary oxidative phosphorylation defects.
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Affiliation(s)
- Eva Morava
- Department of Pediatrics, Nijmegen Centre for Mitochondrial Disorders, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands,
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Morava E, Rodenburg R, Hol F, De Meirleir L, Seneca S, Busch R, van den Heuvel L, Smeitink J. Mitochondrial dysfunction in Brooks-Wisniewski-Brown syndrome. Am J Med Genet A 2006; 140:752-6. [PMID: 16477654 DOI: 10.1002/ajmg.a.31117] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Brooks, Wisniewski, and Brown described a familial presentation of severe developmental retardation, speech delay, static encephalopathy with atrophic hydrocephalus, microcephaly, progressive spastic diplegia, a characteristic facial appearance, optic atrophy, and growth retardation associated with hypoplastic corpus callosum in one of the patients. The authors postulated a distinct X-linked mental retardation syndrome. Later on a similar phenotype was observed in three male siblings with an early lethal outcome. Here we describe three patients with several overlapping features and a progressive neurological picture presenting with a significantly compromised mitochondrial oxidative phosphorylation measured in a fresh muscle biopsy. Neurological deterioration is a commonly observed feature in mitochondrial disorders. Based on the unique combination of the clinical symptoms, we suggest that our patients have the Brooks-Wisniewski-Brown syndrome.
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Affiliation(s)
- Eva Morava
- Department of Pediatrics, Radboud University Nijmegen Medical Centre, Nijmegen Centre for Mitochondrial Disorders, Nijmegen, The Netherlands.
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Coenen MJH, Smeitink JAM, Farhoud MH, Nijtmans LGJ, Rodenburg R, Janssen A, van Kaauwen EPM, Trijbels FJM, van den Heuvel LP. The first patient diagnosed with cytochrome c oxidase deficient Leigh syndrome: progress report. J Inherit Metab Dis 2006; 29:212-3. [PMID: 16601896 DOI: 10.1007/s10545-006-0185-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [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] [Indexed: 11/29/2022]
Abstract
Mutations in SURF1, an assembly gene for cytochrome c oxidase (COX), the fourth complex of the oxidative phosphorylation system, are most frequently encountered in patients with COX deficiency. We describe a patient with Leigh syndrome harbouring a mutation in SURF1 who was reported decades ago with a tissue-specific cytochrome c oxidase deficiency.
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Affiliation(s)
- M J H Coenen
- Nijmegen Centre for Mitochondrial Disorder, Radboud University Nijmegen Medical Centre, The Netherlands
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Raissaki M, Grafakou O, Giannopoulos A, Spilioti M, Rodenburg R, Smeitink J, Evangeliou A, Gourtsoyiannis N. Development of subdural effusions in association with pyruvate dehydrogenase deficiency. Eur Radiol 2005; 15:2205-7. [PMID: 15806364 DOI: 10.1007/s00330-005-2729-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2005] [Accepted: 02/22/2005] [Indexed: 11/30/2022]
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Poliwoda H, Diederich KW, Schneider B, Rodenburg R, Heckner F, Körtge P, van de Loo J, Pezold FA, Praetorius F, Schmutzler R, Zekorn D. [On the thrombolytic therapy of recent myocardial infarction. 2. Results of electrocardiographic studies]. Dtsch Med Wochenschr 1966; 91:978-84. [PMID: 5930212 DOI: 10.1055/s-0028-1110686] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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