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Aldosary M, Baselm S, Abdulrahim M, Almass R, Alsagob M, AlMasseri Z, Huma R, AlQuait L, Al‐Shidi T, Al‐Obeid E, AlBakheet A, Alahideb B, Alahaidib L, Qari A, Taylor RW, Colak D, AlSayed MD, Kaya N. SLC25A42-associated mitochondrial encephalomyopathy: Report of additional founder cases and functional characterization of a novel deletion. JIMD Rep 2021; 60:75-87. [PMID: 34258143 PMCID: PMC8260478 DOI: 10.1002/jmd2.12218] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 03/09/2021] [Accepted: 03/26/2021] [Indexed: 12/12/2022] Open
Abstract
SLC25A42 is the main transporter of coenzyme A (CoA) into mitochondria. To date, 15 individuals have been reported to have one of two bi-allelic homozygous missense variants in the SLC25A42 as the cause of mitochondrial encephalomyopathy, of which 14 of them were of Saudi origin and share the same founder variant, c.871A > G:p.Asn291Asp. The other subject was of German origin with a variant at canonical splice site, c.380 + 2 T > A. Here, we describe the clinical manifestations and the disease course in additional six Saudi patients from four unrelated consanguineous families. While five patients have the Saudi founder p.Asn291Asp variant, one subject has a novel deletion. Functional analyses on fibroblasts obtained from this patient revealed that the deletion causes significant decrease in mitochondrial oxygen consumption and ATP production compared to healthy individuals. Moreover, extracellular acidification rate revealed significantly reduced glycolysis, glycolytic capacity, and glycolytic reserve as compared to control individuals. There were no changes in the mitochondrial DNA (mtDNA) content of patient fibroblasts. Immunoblotting experiments revealed significantly diminished protein expression due to the deletion. In conclusion, we report additional patients with SLC25A42-associated mitochondrial encephalomyopathy. Our study expands the molecular spectrum of this condition and provides further evidence of mitochondrial dysfunction as a central cause of pathology. We therefore propose that this disorder should be included in the differential diagnosis of any patient with an unexplained motor and speech delay, recurrent encephalopathy with metabolic acidosis, intermittent or persistent dystonia, lactic acidosis, basal ganglia lesions and, especially, of Arab ethnicity. Finally, deep brain stimulation should be considered in the management of patients with life altering dystonia.
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Affiliation(s)
- Mazhor Aldosary
- Department of GeneticsKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
- Translational Genomics Department, Center for Genomic Medicine (CGM)King Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | - Shahad Baselm
- Department of GeneticsKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | - Maha Abdulrahim
- Department of GeneticsKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | - Rawan Almass
- Department of GeneticsKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
- Translational Genomics Department, Center for Genomic Medicine (CGM)King Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
- Department of Medical GeneticsKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | - Maysoon Alsagob
- Department of GeneticsKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
- Translational Genomics Department, Center for Genomic Medicine (CGM)King Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
- King Abdulaziz City for Science and TechnologyRiyadhSaudi Arabia
| | - Zainab AlMasseri
- Department of Medical GeneticsKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | - Rozeena Huma
- Department of Medical GeneticsKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | - Laila AlQuait
- Department of GeneticsKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
- Translational Genomics Department, Center for Genomic Medicine (CGM)King Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | - Tarfa Al‐Shidi
- Department of GeneticsKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
- Translational Genomics Department, Center for Genomic Medicine (CGM)King Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | - Eman Al‐Obeid
- Department of GeneticsKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | - Albandary AlBakheet
- Department of GeneticsKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
- Translational Genomics Department, Center for Genomic Medicine (CGM)King Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | - Basma Alahideb
- Department of GeneticsKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | - Lujane Alahaidib
- Department of GeneticsKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | - Alya Qari
- Department of Medical GeneticsKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | - Robert W. Taylor
- Wellcome Centre for Mitochondrial Research, Translational and Clinical Research Institute, Newcastle UniversityNewcastle upon TyneUK
- NHS Highly Specialised Mitochondrial Diagnostic LaboratoryNewcastle upon Tyne Hospitals NHS Foundation TrustNewcastle upon TyneUK
| | - Dilek Colak
- Department of Biostatistics, Epidemiology, and Scientific ComputingKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | - Moeenaldeen D. AlSayed
- Department of Medical GeneticsKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
- College of MedicineAlfaisal UniversityRiyadhSaudi Arabia
| | - Namik Kaya
- Department of GeneticsKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
- Translational Genomics Department, Center for Genomic Medicine (CGM)King Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
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Alfadhel M, Al Othaim A, Al Saif S, Al Mutairi F, Alsayed M, Rahbeeni Z, Alzaidan H, Alowain M, Al-Hassnan Z, Saeedi M, Aljohery S, Alasmari A, Faqeih E, Alwakeel M, AlMashary M, Almohameed S, Alzahrani M, Migdad A, Al-Dirbashi OY, Rashed M, Alamoudi M, Jacob M, Alahaidib L, El-Badaoui F, Saadallah A, Alsulaiman A, Eyaid W, Al-Odaib A. Expanded Newborn Screening Program in Saudi Arabia: Incidence of screened disorders. J Paediatr Child Health 2017; 53:585-591. [PMID: 28337809 DOI: 10.1111/jpc.13469] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 11/01/2016] [Accepted: 11/13/2016] [Indexed: 11/29/2022]
Abstract
AIM To address the implementation of the National Newborn Screening Program (NBS) in Saudi Arabia and stratify the incidence of the screened disorders. METHODS A retrospective study conducted between 1 August 2005 and 31 December 2012, total of 775 000 newborns were screened from 139 hospitals distributed among all regions of Saudi Arabia. The NBS Program screens for 16 disorders from a selective list of inborn errors of metabolism (IEM) and endocrine disorders. Heel prick dry blood spot samples were obtained from all newborns for biochemical and immunoassay testing. Recall screening testing was performed for Initial positive results and confirmed by specific biochemical assays. RESULTS A total of 743 cases were identified giving an overall incidence of 1:1043. Frequently detected disorders nationwide were congenital hypothyroidism and congenital adrenal hyperplasia with an incidence of 1:7175 and 1:7908 correspondingly. The highest incidence among the IEM was propionic acidaemia with an incidence rate of 1:14 000. CONCLUSION The article highlights the experience of the NBS Program in Saudi Arabia and providing data on specific regional incidences of all the screened disorders included in the programme; and showed that the incidence of these disorders is one of the highest reported so far world-wide.
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Affiliation(s)
- Majid Alfadhel
- Department of Pediatrics, King Abdulaziz Medical City, Riyadh, Saudi Arabia.,King Saud bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Riyadh, Saudi Arabia.,Ministry of National Guard-Health Affairs (NGHA), Riyadh, Saudi Arabia
| | - Ali Al Othaim
- King Saud bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Riyadh, Saudi Arabia.,Ministry of National Guard-Health Affairs (NGHA), Riyadh, Saudi Arabia.,Department of Pathology, King Abdulaziz Medical City, Riyadh, Saudi Arabia
| | - Saif Al Saif
- Department of Pediatrics, King Abdulaziz Medical City, Riyadh, Saudi Arabia.,King Saud bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Riyadh, Saudi Arabia.,Ministry of National Guard-Health Affairs (NGHA), Riyadh, Saudi Arabia
| | - Fuad Al Mutairi
- Department of Pediatrics, King Abdulaziz Medical City, Riyadh, Saudi Arabia.,King Saud bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Riyadh, Saudi Arabia.,Ministry of National Guard-Health Affairs (NGHA), Riyadh, Saudi Arabia
| | - Moeenaldeen Alsayed
- Department of Medical Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Zuhair Rahbeeni
- Department of Medical Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Hamad Alzaidan
- Department of Medical Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Mohammed Alowain
- Department of Medical Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Zuhair Al-Hassnan
- Department of Medical Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia.,The National Newborn Screening Program, Ministry of Health, Riyadh, Saudi Arabia
| | - Mohamad Saeedi
- Noncommunicable Disease, Ministry of Health, Riyadh, Saudi Arabia
| | - Saeed Aljohery
- Noncommunicable Disease, Ministry of Health, Riyadh, Saudi Arabia
| | - Ali Alasmari
- Medical Genetic Section, King Fahad Medical City, Children's Hospital, Riyadh, Saudi Arabia
| | - Eissa Faqeih
- Medical Genetic Section, King Fahad Medical City, Children's Hospital, Riyadh, Saudi Arabia
| | | | - Maher AlMashary
- Armed Forces Medical Services Directorate, Riyadh, Saudi Arabia
| | | | - Mohammed Alzahrani
- Department of Pediatrics, Security Forces Hospital, Riyadh, Saudi Arabia
| | - Abeer Migdad
- Department of Pediatrics, Security Forces Hospital, Riyadh, Saudi Arabia
| | - Osama Y Al-Dirbashi
- Faculty of Medicine and Health Sciences, United Arab Emirates University, Al-Ain, UAE.,Children Hospital of Eastern Ontario Research Institute, Ottawa, Canada
| | | | | | - Minnie Jacob
- Research Center, Ministry of Health, Riyadh, Saudi Arabia
| | | | | | - Amal Saadallah
- Research Center, Ministry of Health, Riyadh, Saudi Arabia
| | | | - Wafaa Eyaid
- Department of Pediatrics, King Abdulaziz Medical City, Riyadh, Saudi Arabia.,King Saud bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Riyadh, Saudi Arabia.,Ministry of National Guard-Health Affairs (NGHA), Riyadh, Saudi Arabia
| | - Ali Al-Odaib
- Research Center, Ministry of Health, Riyadh, Saudi Arabia.,King Salman Center for Disability Research, Riyadh, Saudi Arabia
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