1
|
Martins S, Yahia A, Costa IPD, Siddig HE, Abubaker R, Koko M, Corral-Juan M, Matilla-Dueñas A, Brice A, Durr A, Leguern E, Ranum LPW, Amorim A, Elsayed LEO, Stevanin G, Sequeiros J. Machado-Joseph disease in a Sudanese family links East Africa to Portuguese families and allows reestimation of ancestral age of the Machado lineage. Hum Genet 2023; 142:1747-1754. [PMID: 37957369 PMCID: PMC10676304 DOI: 10.1007/s00439-023-02611-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 10/22/2023] [Indexed: 11/15/2023]
Abstract
Machado-Joseph disease (MJD/SCA3) is the most frequent dominant ataxia worldwide. It is caused by a (CAG)n expansion. MJD has two major ancestral backgrounds: the Machado lineage, found mainly in Portuguese families; and the Joseph lineage, present in all five continents, probably originating in Asia. MJD has been described in a few African and African-American families, but here we report the first diagnosed in Sudan to our knowledge. The proband presented with gait ataxia at age 24; followed by muscle cramps and spasticity, and dysarthria, by age 26; he was wheel-chair bound at 29 years of age. His brother had gait problems from age 20 years and, by age 21, lost the ability to run, showed dysarthria and muscle cramps. To assess the mutational origin of this family, we genotyped 30 SNPs and 7 STRs flanking the ATXN3_CAG repeat in three siblings and the non-transmitting father. We compared the MJD haplotype segregating in the family with our cohort of MJD families from diverse populations. Unlike all other known families of African origin, the Machado lineage was observed in Sudan, being shared with 86 Portuguese, 2 Spanish and 2 North-American families. The STR-based haplotype of Sudanese patients, however, was distinct, being four steps (2 STR mutations and 2 recombinations) away from the founder haplotype shared by 47 families, all of Portuguese extraction. Based on the phylogenetic network constructed with all MJD families of the Machado lineage, we estimated a common ancestry at 3211 ± 693 years ago.
Collapse
Affiliation(s)
- Sandra Martins
- i3S-Instituto de Investigação e Inovação em Saúde, University of Porto, Porto, Portugal
- IPATIMUP-Institute of Molecular Pathology and Immunology, University of Porto, Porto, Portugal
| | - Ashraf Yahia
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
- Sorbonne University, Paris Brain Institute - ICM, Inserm, CNRS, AP-HP, Paris, France
- Center of Neurodevelopmental Disorders (KIND), Centre for Psychiatry Research, Department of Women's and Children's Health, Karolinska Institutet and Stockholm Health Care Services, Stockholm, Sweden
| | - Inês P D Costa
- i3S-Instituto de Investigação e Inovação em Saúde, University of Porto, Porto, Portugal
- IPATIMUP-Institute of Molecular Pathology and Immunology, University of Porto, Porto, Portugal
| | - Hassab E Siddig
- Division of Neurology, Sudan Medical Council, Khartoum, Sudan
| | - Rayan Abubaker
- Sudanese Neurogenetics Research Group, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Mahmoud Koko
- Sudanese Neurogenetics Research Group, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Marc Corral-Juan
- Functional and Translational Neurogenetics Unit, Department of Neuroscience, Health Sciences Research Institute Germans Trias I Pujol (IGTP)-Universitat Autònoma de Barcelona, Can Ruti Campus, Badalona, Barcelona, Spain
| | - Antoni Matilla-Dueñas
- Functional and Translational Neurogenetics Unit, Department of Neuroscience, Health Sciences Research Institute Germans Trias I Pujol (IGTP)-Universitat Autònoma de Barcelona, Can Ruti Campus, Badalona, Barcelona, Spain
| | - Alexis Brice
- Sorbonne University, Paris Brain Institute - ICM, Inserm, CNRS, AP-HP, Paris, France
| | - Alexandra Durr
- Sorbonne University, Paris Brain Institute - ICM, Inserm, CNRS, AP-HP, Paris, France
| | - Eric Leguern
- Sorbonne University, Paris Brain Institute - ICM, Inserm, CNRS, AP-HP, Paris, France
- Genetics Department, APHP, Pitié-Salpêtrière Hospital, Paris, France
| | - Laura P W Ranum
- Center for NeuroGenetics, College of Medicine, University of Florida, Gainesville, FL, USA
| | - António Amorim
- i3S-Instituto de Investigação e Inovação em Saúde, University of Porto, Porto, Portugal
- IPATIMUP-Institute of Molecular Pathology and Immunology, University of Porto, Porto, Portugal
- Department of Biology, Faculty of Sciences, University of Porto, Porto, Portugal
| | - Liena E O Elsayed
- Department of Basic Sciences, College of Medicine, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Giovanni Stevanin
- Sorbonne University, Paris Brain Institute - ICM, Inserm, CNRS, AP-HP, Paris, France
- Univ. Bordeaux, CNRS-Centre National de la Recherche Scientifique, INCIA-Institut de Neurosciences Cognitives et Intégratives d'Aquitaine, UMR 5287, Bordeaux, France
- EPHE-École Pratique des Hautes Études, CNRS-Centre National de la Recherche Scientifique, INCIA-Institut de Neurosciences Cognitives et Intégratives d'Aquitaine, UMR 5287, Paris, France
| | - Jorge Sequeiros
- i3S-Instituto de Investigação e Inovação em Saúde, University of Porto, Porto, Portugal.
- UnIGENe and CGPP-Centro de Genética Preditiva e Preventiva, IBMC-Institute for Molecular and Cell Biology, University of Porto, Porto, Portugal.
- ICBAS School of Medicine and Biomedical Sciences, University of Porto, Porto, Portugal.
| |
Collapse
|
2
|
Bakhit Y, Ibrahim MO, Tesson C, Elhassan AA, Ahmed MA, Alebeed MA, Elrasheed SM, Omar MA, Abubaker R, Eltom K, Shaheen MT, Ibrahim YA, Almak ME, Ali HA, Abugrain AA, Almahal MA, MohamedSharif AA, Tahir MY, Malik SM, Eldirdiri Abdelrahman H, Khidir RJ, Mohamed MT, Abdalla A, Elsayed LEO, Lesage S, Corvol JC, Seidi O, Wüllner U. Intrafamilial and interfamilial heterogeneity of PINK1-associated Parkinson's disease in Sudan. Parkinsonism Relat Disord 2023; 111:105401. [PMID: 37150071 DOI: 10.1016/j.parkreldis.2023.105401] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 01/26/2023] [Revised: 04/10/2023] [Accepted: 04/11/2023] [Indexed: 05/09/2023]
Abstract
PINK1 is the second most predominant gene associated with autosomal recessive Parkinson's disease. Homozygous mutations in this gene are associated with an early onset of symptoms. Bradykinesia, tremors, and rigidity are common features, while dystonia, motor fluctuation, and non-motor symptoms occur in a lower percentage of cases and usually respond well to levodopa. We investigated 14 individuals with parkinsonism and eleven symptom-free siblings from three consanguineous Sudanese families, two of them multigenerational, using a custom gene panel screening 34 genes, 27 risk variants, and 8 candidate genes associated with parkinsonism. We found a known pathogenic nonsense PINK1 variant (NM_032409.3:c.1366C>T; p.(Gln456*)), a novel pathogenic single base duplication (NM_032409.3:c.1597dup; p.(Gln533Profs*29)), and another novel pathogenic insertion (NM_032409.3:c.1448_1449ins[1429_1443; TTGAG]; p.(Arg483Serfs*7)). All variants were homozygous and co-segregated in all affected family members. We also identified intrafamilial and interfamilial phenotypic heterogeneity associated with PINK1 mutations in these Sudanese cases, possibly reflecting the nature of the Sudanese population that has a large effective population size, which suggests a higher possibility of novel findings in monogenic and polygenic diseases in Sudan.
Collapse
Affiliation(s)
- Yousuf Bakhit
- Department of Neurology, University Hospital Bonn, Germany; Department of Basic Medical Sciences, Faculty of Dentistry, University of Khartoum, Sudan; Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan.
| | - Mohamed O Ibrahim
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan; Department of Biochemistry, Faculty of Medicine, Sudan University of Science and Technology, Khartoum, Sudan
| | - Christelle Tesson
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute - ICM, Inserm, CNRS, Paris, France
| | - Ali A Elhassan
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan
| | | | - Mohamed A Alebeed
- Department of Biochemistry, Faculty of Medicine, Sudan University of Science and Technology, Khartoum, Sudan
| | - Salma M Elrasheed
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan
| | - Mawia A Omar
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan
| | - Rayan Abubaker
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan
| | - Khalid Eltom
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan; Department of Medical Cell Biology, Uppsala Biomedical Center, Uppsala University, Uppsala, Sweden
| | - Mutaz T Shaheen
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan
| | - Yousuf A Ibrahim
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan
| | - Murad E Almak
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan
| | - Hiba A Ali
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan
| | - Ahmed A Abugrain
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan
| | - Mohamed A Almahal
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan
| | - Abubaker A MohamedSharif
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan; Department of Anatomy, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Mohamed Y Tahir
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan
| | - Sawazen M Malik
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan
| | - Hazim Eldirdiri Abdelrahman
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan; Institute of Psychiatry and Neuroscience of Paris, 102 rue de la Sante, 75014, Paris, France
| | - Reem J Khidir
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan
| | - Malaz T Mohamed
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan
| | - Abdelmohaymin Abdalla
- Sudan Neuroscience Projects (SNPs), University of Khartoum, Khartoum, Sudan; Department of Pulmonary and Critical Care, Mayo Clinic, Phoenix, AZ, USA
| | - Liena E O Elsayed
- Department of Basic Sciences, College of Medicine, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh, 11671, Saudi Arabia
| | - Suzanne Lesage
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute - ICM, Inserm, CNRS, Paris, France
| | - Jean-Christophe Corvol
- Sorbonne Université, Paris Brain Institute - ICM, Inserm, CNRS, Assistance Publique Hôpitaux de Paris, Department of Neurology, Pitié-Salpêtrière Hospital, Paris, France
| | - Osheik Seidi
- Department of Neurology, Soba Teaching Hospital, And Department of Medicine, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Ullrich Wüllner
- Department of Neurology, University Hospital Bonn, Germany; German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany.
| |
Collapse
|
3
|
Yahia A, Hamed AAA, Mohamed IN, Elseed MA, Salih MA, El-Sadig SM, Siddig HE, Nasreldien AEM, Abdullah MA, Elzubair M, Omer FY, Bakhiet AM, Abubaker R, Abozar F, Adil R, Emad S, Musallam MA, Eltazi IZM, Omer Z, Malik H, Mohamed MOE, Elhassan AA, Mohamed EOE, Ahmed AKMA, Ahmed EAA, Eltaraifee E, Hussein BK, Abd Allah ASI, Salah L, Nimir M, Tag Elseed OM, Elhassan TEA, Elbashier A, Alfadul ESA, Fadul M, Ali KF, Taha SOMA, Bushara EE, Amin M, Koko M, Ibrahim ME, Ahmed AE, Elsayed LEO, Stevanin G. Clinical phenotyping and genetic diagnosis of a large cohort of Sudanese families with hereditary spinocerebellar degenerations. Eur J Hum Genet 2023:10.1038/s41431-023-01344-6. [PMID: 37012327 DOI: 10.1038/s41431-023-01344-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 02/12/2023] [Accepted: 03/13/2023] [Indexed: 04/05/2023] Open
Abstract
Hereditary spinocerebellar degenerations (SCDs) is an umbrella term that covers a group of monogenic conditions that share common pathogenic mechanisms and include hereditary spastic paraplegia (HSP), cerebellar ataxia, and spinocerebellar ataxia. They are often complicated with axonal neuropathy and/or intellectual impairment and overlap with many neurological conditions, including neurodevelopmental disorders. More than 200 genes and loci inherited through all modes of Mendelian inheritance are known. Autosomal recessive inheritance predominates in consanguineous communities; however, autosomal dominant and X-linked inheritance can also occur. Sudan is inhabited by genetically diverse populations, yet it has high consanguinity rates. We used next-generation sequencing, genotyping, bioinformatics analysis, and candidate gene approaches to study 90 affected patients from 38 unrelated Sudanese families segregating multiple forms of SCDs. The age-at-onset in our cohort ranged from birth to 35 years; however, most patients manifested childhood-onset diseases (the mean and median ages at onset were 7.5 and 3 years, respectively). We reached the genetic diagnosis in 63% and possibly up to 73% of the studied families when considering variants of unknown significance. Combining the present data with our previous analysis of 25 Sudanese HSP families, the success rate reached 52-59% (31-35/59 families). In this article we report candidate variants in genes previously known to be associated with SCDs or other phenotypically related monogenic disorders. We also highlight the genetic and clinical heterogeneity of SCDs in Sudan, as we did not identify a major causative gene in our cohort, and the potential for discovering novel SCD genes in this population.
Collapse
Affiliation(s)
- Ashraf Yahia
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan.
- Paris Brain Institute - ICM, CNRS UMR7225, INSERM 1127, Sorbonne University, F-75000, Paris, France.
- Center of Neurodevelopmental Disorders (KIND), Centre for Psychiatry Research, Department of Women's and Children's Health, Karolinska Institutet and Stockholm Health Care Services, Region Stockholm, Stockholm, Sweden.
- Astrid Lindgren Children's Hospital, Karolinska University Hospital, Solna, Sweden.
| | - Ahlam A A Hamed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Inaam N Mohamed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Maha A Elseed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Mustafa A Salih
- Division of Pediatric Neurology, Department of Pediatrics, College of Medicine, King Saud University, Riyadh, Saudi Arabia
- College of Medicine, AlMughtaribeen University, Khartoum, Sudan
| | | | | | - Ali Elsir Musa Nasreldien
- Pediatric Neurology Department, Red Cross Memorial Children Hospital (RCWMCH), University of Cape Town (UCT), Cape Town, South Africa
| | | | - Maha Elzubair
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | | | | | - Rayan Abubaker
- Sudanese Neurogenetics Research group, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
- National University Biomedical Research Institute, National University, Khartoum, Sudan
| | - Fatima Abozar
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Rawaa Adil
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Sara Emad
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | | | - Isra Z M Eltazi
- Neurology Department, Hamad Medical Corporation, Doha, Qatar
| | - Zulfa Omer
- Department of Hematology and Medical Oncology, University of Cincinnati Medical Center, Ohio, USA
| | - Hiba Malik
- Department of Neurology, Cambridge University Hospitals NHS Foundation Trust, Cambridge, CB2 0QQ, UK
| | - Mayada O E Mohamed
- Division of Emergency Medicine, Sudan Medical Specialization Board, Khartoum, Sudan
| | - Ali A Elhassan
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan
| | | | - Ahmed K M A Ahmed
- Department of Molecular Neuroscience, Graduate school of Medicine, Osaka University, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
- WPI Immunology Frontier Research Center, Osaka University, 3-1, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | | | | | - Bidour K Hussein
- Institute of Endemic Diseases, University of Khartoum, Khartoum, Sudan
| | | | - Lina Salah
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Mohamed Nimir
- Department of Pathology, University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK
- Warwick Medical School, University of Warwick, Coventry, UK
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK
| | | | | | | | | | - Moneeb Fadul
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Khalil F Ali
- Department of Cardiology, Royal Derby Hospital, Derby, UK
| | | | | | - Mutaz Amin
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, Al-Neelain University, Khartoum, Sudan
| | - Mahmoud Koko
- Institute of Endemic Diseases, University of Khartoum, Khartoum, Sudan
| | | | - Ammar E Ahmed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Liena E O Elsayed
- Department of Basic Sciences, College of Medicine, Princess Nourah bint Abdulrahman University, Riyadh, P.O.Box 84428, Riyadh, 11671, Saudi Arabia
| | - Giovanni Stevanin
- Paris Brain Institute - ICM, CNRS UMR7225, INSERM 1127, Sorbonne University, F-75000, Paris, France.
- Univ. Bordeaux, CNRS, INCIA, UMR 5287, F-33000, Bordeaux, France.
- EPHE, PSL Research university, CNRS, INCIA, UMR 5287, F-75000, Paris, France.
| |
Collapse
|
4
|
Amin M, Vignal C, Eltaraifee E, Mohammed IN, Hamed AAA, Elseed MA, Babai A, Elbadi I, Mustafa D, Abubaker R, Mustafa M, Drunat S, Elsayed LEO, Ahmed AE, Boespflug-Tanguy O, Dorboz I. A novel homozygous mutation in TRAPPC9 gene causing autosomal recessive non-syndromic intellectual disability. BMC Med Genomics 2022; 15:236. [PMID: 36348459 PMCID: PMC9644490 DOI: 10.1186/s12920-022-01354-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 09/09/2022] [Indexed: 11/10/2022] Open
Abstract
Background The etiology of intellectual disabilities is diverse and includes both genetic and environmental factors. The genetic causes of intellectual disabilities range from chromosomal aberrations to single gene disorders. The TRAPPC9 gene has been reported to cause autosomal recessive forms of intellectual disabilities in 56 patients from consanguineous and non-consanguineous families around the world. Methods We analyzed two siblings with intellectual disability, microcephaly and delayed motor and speech development from a consanguineous Sudanese family. Genomic DNA was screened for mutations using NGS panel (NextSeq500 Illumina) testing 173 microcephaly associated genes in the Molecular Genetics service in Robert Debre hospital in Paris, France. Results A novel homozygous mutation (NM_031466.7 (TRAPPC9):c.2288dup, p. (Val764Glyfs*7) in exon 14 of TRAPPC9 gene was found in the two patients. The mutation was predicted to cause nonsense mediated decay (NSMD) using SIFT prediction tool. The variant has not been found in either gnomAD or Exac databases. Both parents were heterozygous (carriers) to the mutation. Conclusion This is the first study to report patients with TRAPPC9-related disorder from Sub-Saharan Africa.
Collapse
|
5
|
Bakhit Y, Schmitt I, Hamed A, Ibrahim EAA, Mohamed IN, El-Sadig SM, Elseed MA, Alebeed MA, Shaheen MT, Ibrahim MO, Elhassan AA, Eltom K, Ali HA, Ibrahim YA, Almak ME, Abubaker R, Ahmed MA, Abugrain AA, Elrasheed SM, Omar MA, Almahal MA, MohamedSharif AA, Tahir MY, Malik SM, Eldirdiri HS, Khidir RJ, Mohamed MT, Abdalla A, Omer FY, Elsayed LEO, Babikir HEH, Bukhari EAA, Seidi O, Wüllner U. Methylation of alpha-synuclein in a Sudanese cohort. Parkinsonism Relat Disord 2022; 101:6-8. [PMID: 35728367 DOI: 10.1016/j.parkreldis.2022.05.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 05/02/2022] [Accepted: 05/10/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND Several studies suggested a significant role of epigenetic changes, including alterations in miRNA, histone modifications, and DNA methylation of α-synuclein (SNCA) in Parkinson's disease (PD) pathogenicity. As of yet, only very few studies have been carried out in this field in Africa and none in Sudan. MATERIALS AND METHODS We collected DNA from 172 Sudanese individuals (90 cases, 82 controls) who donated saliva for DNA extraction (mean age of onset: 40.6 ± 22.4 years). A family history of PD was evident in 64 patients. DNA preparation and bisulfite sequencing of SNCAintron1 was performed as described earlier. RESULTS Of the fourteen analyzed CpGs of SNCAintron1, CpGs 16-23 were hypomethylated in PD (P-value ranged from 0.023 to 0.003). P-values improved, when sporadic cases were excluded from the analysis. CONCLUSION We identified the presence of a specific pattern of DNA methylation in a young Sudanese cohort of familial PD, which confirms the importance of the methylation of SNCAintron1 for PD. This phenomenon appears to be independent of ethnicity, the impact of environmental factors, drug history, or familial clustering.
Collapse
Affiliation(s)
- Yousuf Bakhit
- Department of Neurology, University Hospital Bonn, Germany; Department of Basic Medical Sciences, Faculty of Dentistry, University of Khartoum, Sudan; Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan.
| | - Ina Schmitt
- Department of Neurology, University Hospital Bonn, Germany
| | - Ahlam Hamed
- Department of Paediatrics, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Etedal Ahmed A Ibrahim
- Faculty of Medicine, Al Neelain University, Khartoum, Sudan, and The National Centre for Neurological Sciences, Sudan
| | - Inaam N Mohamed
- Department of Paediatrics, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Sarah M El-Sadig
- Department of Neurology, Soba Teaching Hospital, And Department of Medicine, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Maha A Elseed
- Department of Paediatrics, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Mohamed A Alebeed
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan
| | - Mutaz T Shaheen
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan
| | - Mohamed O Ibrahim
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan; Department of Biochemistry, Faculty of Medicine, Sudan University of Science and Technology, Khartoum, Sudan
| | - Ali A Elhassan
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan
| | - Khalid Eltom
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan
| | - Hiba A Ali
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan
| | - Yousuf A Ibrahim
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan
| | - Murad E Almak
- Department of Physiology, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Rayan Abubaker
- Department of Molecular Medicine, Institute of Endemic Diseases, University of Khartoum, Khartoum, Sudan; Department of Molecular Biology, National University Biomedical Research Institute (NUBRI), National University, Khartoum, Sudan
| | | | - Ahmed A Abugrain
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan
| | - Salma M Elrasheed
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan
| | - Mawia A Omar
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan
| | - Mohamed A Almahal
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan
| | - Abubaker A MohamedSharif
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan; Department of Anatomy, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Mohamed Y Tahir
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan
| | - Sawazen M Malik
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan
| | - Hazim S Eldirdiri
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan; University of Bordeaux, INSERM, U1215, Neurocentre Magendie, Bordeaux, France
| | - Reem J Khidir
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan
| | - Malaz T Mohamed
- Sudan Neuroscience Projects, University of Khartoum, Khartoum, Sudan
| | | | - Farouk Yassen Omer
- Department of Medicine, Neurology, Omdurman Islamic University, Khartoum, Sudan
| | - Liena E O Elsayed
- Department of Basic Sciences, College of Medicine, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Haydar El Hadi Babikir
- Department of Paediatrics and Child Health, Faculty of Medicine, University of Gezira, Sudan
| | - Elfateh Abd-Allah Bukhari
- Department of Neurology, Bashaier University Hospital, And Khartoum Teaching Hospital. Department of Medicine, Faculty of Medicine, Al-Neelain University, Khartoum, Sudan
| | - Osheik Seidi
- Department of Neurology, Soba Teaching Hospital, And Department of Medicine, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Ullrich Wüllner
- Department of Neurology, University Hospital Bonn, Germany; German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany.
| |
Collapse
|
6
|
Amin M, Vignal C, Hamed AAA, Mohammed IN, Elseed MA, Abubaker R, Bakhit Y, Babai A, Elbadi E, Eltaraifee E, Mustafa D, Yahia A, Osman M, Koko M, Mustafa M, Alsiddig M, Haroun S, Elshafea A, Drunat S, Elsayed LEO, Ahmed AE, Boespflug-Tanguy O, Dorboz I. Case Report: A New Family With Pontocerebellar Hypoplasia 10 From Sudan. Front Genet 2022; 13:883211. [PMID: 35719383 PMCID: PMC9201487 DOI: 10.3389/fgene.2022.883211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 04/29/2022] [Indexed: 11/13/2022] Open
Abstract
Pontocerebellar hypoplasia type 10 (PCH10) is a very rare autosomal recessive neurodegenerative disease characterized by intellectual disability, microcephaly, severe developmental delay, pyramidal signs, mild cerebellar atrophy, and white matter changes in the brain, as shown by magnetic resonance imaging (MRI). The disease has been described in only twenty-one patients from ten Turkish families with a founder missense pathogenic variant in the CLP1 gene involved in tRNA processing and maturation. We analyzed three siblings from a consanguineous Sudanese family who presented with intellectual disability, dysmorphic features, developmental delay, regression of milestones, microcephaly, epilepsy, extrapyramidal signs, mild pontine, and cerebellar atrophy. We identified through whole-exome sequencing the same pathogenic variant (c.419G>A; p(Arg140His) reported before in all Turkish families. Our study extends the phenotypes of PCH10 and reports for the first time cases with PCH10 of non-Turkish origin.
Collapse
Affiliation(s)
- Mutaz Amin
- Faculty of Medicine, Al-Neelain University, Khartoum, Sudan
- INSERM UMR 1141 PROTECT, Université Paris Diderot-Sorbonne, Paris, France
| | - Cedric Vignal
- Unité de Génétique Moleculaire, Departement de Genetique Médicale, APHP, Hopital Robert-Debré, Paris, France
| | | | | | - Maha A. Elseed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Rayan Abubaker
- Neurogenetics Research group, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
- National University Biomedical Research Institute, National University-Sudan, Khartoum, Sudan
| | - Yousuf Bakhit
- Faculty of Dentistry, University of Khartoum, Khartoum, Sudan
- Department of Neurobiology, Centre for Neurology, UKB, University of Bonn, Bonn, Germany
| | - Arwa Babai
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Eman Elbadi
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | | | - Doua Mustafa
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Ashraf Yahia
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Melka Osman
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Mahmoud Koko
- Neurogenetics Research group, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Mohamed Mustafa
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | | | - Sahwah Haroun
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Azza Elshafea
- Neurogenetics Research group, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Severine Drunat
- INSERM UMR 1141 PROTECT, Université Paris Diderot-Sorbonne, Paris, France
- Unité de Génétique Moleculaire, Departement de Genetique Médicale, APHP, Hopital Robert-Debré, Paris, France
| | - Liena E. O. Elsayed
- Department of Basic Sciences, College of Medicine, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Ammar E. Ahmed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Odile Boespflug-Tanguy
- INSERM UMR 1141 PROTECT, Université Paris Diderot-Sorbonne, Paris, France
- Neuropediatrics and Metabolic Disorders Department, Reference Center for Leukodystrophies and Rare Leukoencéphalopathies (LEUKOFRANCE), CHU APHP Robert-Debré, Paris, France
| | - Imen Dorboz
- INSERM UMR 1141 PROTECT, Université Paris Diderot-Sorbonne, Paris, France
- Neuropediatrics and Metabolic Disorders Department, Reference Center for Leukodystrophies and Rare Leukoencéphalopathies (LEUKOFRANCE), CHU APHP Robert-Debré, Paris, France
- *Correspondence: Imen Dorboz,
| |
Collapse
|
7
|
Yahia A, Ayed IB, Hamed AA, Mohammed IN, Elseed MA, Bakhiet AM, Guillot-Noel L, Abozar F, Adil R, Emad S, Abubaker R, Musallam MA, Eltazi IZM, Omer Z, Maaroof OM, Soussi A, Bouzid A, Kmiha S, Kamoun H, Salih MA, Ahmed AE, Elsayed L, Masmoudi S, Stevanin G. Genetic diagnosis in Sudanese and Tunisian families with syndromic intellectual disability through exome sequencing. Ann Hum Genet 2022; 86:181-194. [PMID: 35118659 DOI: 10.1111/ahg.12460] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 11/24/2021] [Accepted: 01/17/2022] [Indexed: 12/20/2022]
Abstract
BACKGROUND Intellectual disability is a form of neurodevelopmental disorders that begin in childhood and is characterized by substantial intellectual difficulties as well as difficulties in conceptual, social, and practical areas of living. Several genetic and nongenetic factors contribute to its development; however, its most severe forms are generally attributed to single-gene defects. High-throughput technologies and data sharing contributed to the diagnosis of hundreds of single-gene intellectual disability subtypes. METHOD We applied exome sequencing to identify potential variants causing syndromic intellectual disability in six Sudanese patients from four unrelated families. Data sharing through the Varsome portal corroborated the diagnosis of one of these patients and a Tunisian patient investigated through exome sequencing. Sanger sequencing validated the identified variants and their segregation with the phenotypes in the five studied families. RESULT We identified three pathogenic/likely pathogenic variants in CCDC82, ADAT3, and HUWE1 and variants of uncertain significance in HERC2 and ATP2B3. The patients with the CCDC82 variants had microcephaly and spasticity, two signs absent in the two previously reported families with CCDC82-related intellectual disability. CONCLUSION In conclusion, we report new patients with pathogenic mutations in the genes CCDC82, ADAT3, and HUWE1. We also highlight the possibility of extending the CCDC82-linked phenotype to include spastic paraplegia and microcephaly.
Collapse
Affiliation(s)
- Ashraf Yahia
- Department of Biochemistry, Faculty of Medicine, University of Khartoum, Khartoum, Sudan.,Department of Biochemistry, Faculty of Medicine, National University, Khartoum, Sudan.,Institut du Cerveau - Paris Brain Institute, ICM, Sorbonne Université, INSERM, CNRS, APHP, Paris, France.,Ecole Pratique des Hautes Etudes, EPHE, PSL Research University, Paris, France
| | - Ikhlas Ben Ayed
- Laboratory of Molecular and Cellular Screening Processes (LPCMC), LR15CBS07, Center of Biotechnology of Sfax, University of Sfax, Sfax, Tunisia.,Medical Genetic Department, Hedi Chaker Hospital, Sfax, Tunisia
| | - Ahlam A Hamed
- Department of Pediatrics, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Inaam N Mohammed
- Department of Pediatrics, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Maha A Elseed
- Department of Pediatrics, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Aisha M Bakhiet
- Department of Psychiatry, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Lena Guillot-Noel
- Institut du Cerveau - Paris Brain Institute, ICM, Sorbonne Université, INSERM, CNRS, APHP, Paris, France.,Ecole Pratique des Hautes Etudes, EPHE, PSL Research University, Paris, France
| | - Fatima Abozar
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Rawaa Adil
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Sara Emad
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Rayan Abubaker
- Institute of Endemic Diseases, University of Khartoum, Khartoum, Sudan.,National University Biomedical Research Institute (NUBRI), National University, Khartoum, Sudan
| | | | - Isra Z M Eltazi
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Zulfa Omer
- Department of Hematology and Medical Oncology, University of Cincinnati Medical Center, Cincinnati, Ohio, USA
| | - Omer M Maaroof
- Council of Diagnostic Radiology, Sudan Medical Specialization Board, Khartoum, Sudan
| | - Amal Soussi
- Laboratory of Molecular and Cellular Screening Processes (LPCMC), LR15CBS07, Center of Biotechnology of Sfax, University of Sfax, Sfax, Tunisia
| | - Amal Bouzid
- Laboratory of Molecular and Cellular Screening Processes (LPCMC), LR15CBS07, Center of Biotechnology of Sfax, University of Sfax, Sfax, Tunisia
| | - Sana Kmiha
- Laboratory of Human Molecular Genetics, LR33ES99, Faculty of Medicine of Sfax, University of Sfax, Sfax, Tunisia.,Department of pediatrics, Hedi Chaker Hospital, Sfax, Tunisia
| | - Hassen Kamoun
- Medical Genetic Department, Hedi Chaker Hospital, Sfax, Tunisia.,Laboratory of Human Molecular Genetics, LR33ES99, Faculty of Medicine of Sfax, University of Sfax, Sfax, Tunisia
| | - Mustafa A Salih
- Division of Pediatric Neurology, Department of Pediatrics, College of Medicine, King Saud University, Riyadh, Saudi Arabia.,Department of Pediatrics, College of Medicine, AlMughtaribeen University, Khartoum, Sudan
| | - Ammar E Ahmed
- Department of Physiology, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Liena Elsayed
- Department of Biochemistry, Faculty of Medicine, University of Khartoum, Khartoum, Sudan.,Department of Basic Sciences, College of Medicine, Princess Nourah bint Abdulrahman University, Riyadh, 11671, Saudi Arabia
| | - Saber Masmoudi
- Laboratory of Molecular and Cellular Screening Processes (LPCMC), LR15CBS07, Center of Biotechnology of Sfax, University of Sfax, Sfax, Tunisia
| | - Giovanni Stevanin
- Institut du Cerveau - Paris Brain Institute, ICM, Sorbonne Université, INSERM, CNRS, APHP, Paris, France.,Ecole Pratique des Hautes Etudes, EPHE, PSL Research University, Paris, France
| |
Collapse
|
8
|
Dahawi M, Elmagzoub MS, A. Ahmed E, Baldassari S, Achaz G, Elmugadam FA, Abdelgadir WA, Baulac S, Buratti J, Abdalla O, Gamil S, Alzubeir M, Abubaker R, Noé E, Elsayed L, Ahmed AE, Leguern E. Involvement of ADGRV1 Gene in Familial Forms of Genetic Generalized Epilepsy. Front Neurol 2021; 12:738272. [PMID: 34744978 PMCID: PMC8567843 DOI: 10.3389/fneur.2021.738272] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 09/13/2021] [Indexed: 11/21/2022] Open
Abstract
Background: Genetic generalized epilepsies (GGE) including childhood absence epilepsy (CAE), juvenile absence epilepsy (JAE), juvenile myoclonic epilepsy (JME), and GGE with tonic-clonic seizures alone (GGE-TCS), are common types of epilepsy mostly determined by a polygenic mode of inheritance. Recent studies showed that susceptibility genes for GGE are numerous, and their variants rare, challenging their identification. In this study, we aimed to assess GGE genetic etiology in a Sudanese population. Methods: We performed whole-exome sequencing (WES) on DNA of 40 patients from 20 Sudanese families with GGE searching for candidate susceptibility variants, which were prioritized by CADD software and functional features of the corresponding gene. We assessed their segregation in 138 individuals and performed genotype-phenotype correlations. Results: In a family including three sibs with GGE-TCS, we identified a rare missense variant in ADGRV1 encoding an adhesion G protein-coupled receptor V1, which was already involved in the autosomal recessive Usher type C syndrome. In addition, five other ADGRV1 rare missense variants were identified in four additional families and absent from 119 Sudanese controls. In one of these families, an ADGRV1 variant was found at a homozygous state, in a female more severely affected than her heterozygous brother, suggesting a gene dosage effect. In the five families, GGE phenotype was statistically associated with ADGRV1 variants (0R = 0.9 103). Conclusion: This study highly supports, for the first time, the involvement of ADGRV1 missense variants in familial GGE and that ADGRV1 is a susceptibility gene for CAE/JAE and GGE-TCS phenotypes.
Collapse
Affiliation(s)
- Maha Dahawi
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute - ICM, Inserm, CNRS, Paris, France
- Department of Physiology, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Mohamed S. Elmagzoub
- Faculty of Medicine, National Ribat University, Khartoum, Sudan
- Neuroscience Department, College of Applied Medical Sciences, Imam Abdulrahman bin Faisal University, Dammam, Saudi Arabia
| | - Elhami A. Ahmed
- UNESCO Chair on Bioethics, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Sara Baldassari
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute - ICM, Inserm, CNRS, Paris, France
| | - Guillaume Achaz
- Institut Systématique Evolution Biodiversité, Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, Paris, France
- SMILE Group, CIRB, Collège de France, CNRS, INSERM, Paris, France
- Éco-anthropologie, Muséum National d'Histoire Naturelle, Université de Paris, Paris, France
| | | | - Wasma A. Abdelgadir
- Department of Biochemistry and Molecular Biology, Faculty of Sciences and Technology, Al-Neelain University, Khartoum, Sudan
| | - Stéphanie Baulac
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute - ICM, Inserm, CNRS, Paris, France
| | - Julien Buratti
- Department of Medical Genetics, AP-HP Sorbonne Université, Sorbonne Université, Paris, France
| | - Omer Abdalla
- Department of Physiology, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Sahar Gamil
- Department of Biochemistry, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Maha Alzubeir
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
- Neurology, Sudan Medical Council, Khartoum, Sudan
| | - Rayan Abubaker
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Eric Noé
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute - ICM, Inserm, CNRS, Paris, France
- Sorbonne Université, Paris, France
| | - Liena Elsayed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
- Department of Basic Sciences, College of Medicine, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Ammar E. Ahmed
- Department of Physiology, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
- Neurology, Sudan Medical Council, Khartoum, Sudan
| | - Eric Leguern
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute - ICM, Inserm, CNRS, Paris, France
- Department of Medical Genetics, AP-HP Sorbonne Université, Sorbonne Université, Paris, France
| |
Collapse
|
9
|
Amin M, Vignal C, Hamed AAA, Mohammed IN, Elseed MA, Drunat S, Babai A, Eltaraifee E, Elbadi I, Abubaker R, Mustafa D, Yahia A, Koko M, Osman M, Bakhit Y, Elshafea A, Alsiddig M, Haroun S, Lelay G, Elsayed LEO, Ahmed AE, Boespflug-Tanguy O, Dorboz I. Novel variants causing megalencephalic leukodystrophy in Sudanese families. J Hum Genet 2021; 67:127-132. [PMID: 34504271 DOI: 10.1038/s10038-021-00945-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 05/12/2021] [Accepted: 05/28/2021] [Indexed: 11/09/2022]
Abstract
Mutations in MLC1 cause megalencephalic leukoencephalopathy with subcortical cysts (MLC), a rare form of leukodystrophy characterized by macrocephaly, epilepsy, spasticity, and slow mental deterioration. Genetic studies of MLC are lacking from many parts of the world, especially in Sub-Saharan Africa. Genomic DNA was extracted for 67 leukodystrophic patients from 43 Sudanese families. Mutations were screened using the NGS panel testing 139 leukodystrophies and leukoencephalopathies causing genes (NextSeq500 Illumina). Five homozygous MLC1 variants were discovered in seven patients from five distinct families, including three consanguineous families from the same region of Sudan. Three variants were missense (c.971 T > G, p.Ile324Ser; c.344 T > C, p.Phe115Ser; and c.881 C > T, p.Pro294Leu), one duplication (c.831_838dupATATCTGT, p.Ser280Tyrfs*8), and one synonymous/splicing-site mutation (c.762 C > T, p.Ser254). The segregation pattern was consistent with autosomal recessive inheritance. The clinical presentation and brain MRI of the seven affected patients were consistent with the diagnosis of MLC1. Due to the high frequency of distinct MLC1 mutations found in our leukodystrophic Sudanese families, we analyzed the coding sequence of MLC1 gene in 124 individuals from the Sudanese genome project in comparison with the 1000-genome project. We found that Sudan has the highest proportion of deleterious variants in MLC1 gene compared with other populations from the 1000-genome project.
Collapse
Affiliation(s)
- Mutaz Amin
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan.,Université de Paris, NeuroDiderot, UMR 1141, INSERM, Paris, France
| | - Cedric Vignal
- Unité de Génétique Moleculaire, Departement de Genetique Médicale, APHP, Hopital Robert-Debré, Paris, France
| | - Ahlam A A Hamed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | | | - Maha A Elseed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Severine Drunat
- Université de Paris, NeuroDiderot, UMR 1141, INSERM, Paris, France.,Unité de Génétique Moleculaire, Departement de Genetique Médicale, APHP, Hopital Robert-Debré, Paris, France
| | - Arwa Babai
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | | | - Iman Elbadi
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Rayan Abubaker
- Department of Molecular Biology, Institute of Endemic Diseases, University of Khartoum, Khartoum, Sudan
| | - Doaa Mustafa
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Ashraf Yahia
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan.,Institut du Cerveau, INSERM U1127, CNRS UMR7225, Sorbonne Université, Paris, France
| | - Mahmoud Koko
- Department of Molecular Biology, Institute of Endemic Diseases, University of Khartoum, Khartoum, Sudan
| | - Melka Osman
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Yousuf Bakhit
- Faculty of Dentistry, University of Khartoum, Khartoum, Sudan
| | - Azza Elshafea
- Department of Molecular Biology, Institute of Endemic Diseases, University of Khartoum, Khartoum, Sudan
| | | | - Sahwah Haroun
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Gurvan Lelay
- Université de Paris, NeuroDiderot, UMR 1141, INSERM, Paris, France
| | | | - Ammar E Ahmed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Odile Boespflug-Tanguy
- Université de Paris, NeuroDiderot, UMR 1141, INSERM, Paris, France.,Neuropediatrie, LEUKOFRANCE, APHP, Hopital Robert-Debré, Paris, France
| | - Imen Dorboz
- Université de Paris, NeuroDiderot, UMR 1141, INSERM, Paris, France.
| |
Collapse
|
10
|
Yahia A, Elsayed LEO, Valter R, Hamed AAA, Mohammed IN, Elseed MA, Salih MA, Esteves T, Auger N, Abubaker R, Koko M, Abozar F, Malik H, Adil R, Emad S, Musallam MA, Idris R, Eltazi IZM, Babai A, Ahmed EAA, Abd Allah ASI, Mairey M, Ahmed AKMA, Elbashir MI, Brice A, Ibrahim ME, Ahmed AE, Lamari F, Stevanin G. Pathogenic Variants in ABHD16A Cause a Novel Psychomotor Developmental Disorder With Spastic Paraplegia. Front Neurol 2021; 12:720201. [PMID: 34489854 PMCID: PMC8417901 DOI: 10.3389/fneur.2021.720201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 07/28/2021] [Indexed: 12/20/2022] Open
Abstract
Introduction: Hereditary spastic paraplegia is a clinically and genetically heterogeneous neurological entity that includes more than 80 disorders which share lower limb spasticity as a common feature. Abnormalities in multiple cellular processes are implicated in their pathogenesis, including lipid metabolism; but still 40% of the patients are undiagnosed. Our goal was to identify the disease-causing variants in Sudanese families excluded for known genetic causes and describe a novel clinico-genetic entity. Methods: We studied four patients from two unrelated consanguineous Sudanese families who manifested a neurological phenotype characterized by spasticity, psychomotor developmental delay and/or regression, and intellectual impairment. We applied next-generation sequencing, bioinformatics analysis, and Sanger sequencing to identify the genetic culprit. We then explored the consequences of the identified variants in patients-derived fibroblasts using targeted-lipidomics strategies. Results and Discussion: Two homozygous variants in ABHD16A segregated with the disease in the two studied families. ABHD16A encodes the main brain phosphatidylserine hydrolase. In vitro, we confirmed that ABHD16A loss of function reduces the levels of certain long-chain lysophosphatidylserine species while increases the levels of multiple phosphatidylserine species in patient's fibroblasts. Conclusion:ABHD16A loss of function is implicated in the pathogenesis of a novel form of complex hereditary spastic paraplegia.
Collapse
Affiliation(s)
- Ashraf Yahia
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan.,Department of Biochemistry, Faculty of Medicine, National University, Khartoum, Sudan.,Sorbonne Université, Institut du Cerveau-Paris Brain Institute, INSERM, CNRS, Hôpital Pitié-Salpêtrière, Paris, France.,Ecole Pratique des Hautes Etudes, EPHE, PSL Research University, Paris, France
| | - Liena E O Elsayed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan.,College of Medicine, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Remi Valter
- Sorbonne Université, Institut du Cerveau-Paris Brain Institute, INSERM, CNRS, Hôpital Pitié-Salpêtrière, Paris, France.,Ecole Pratique des Hautes Etudes, EPHE, PSL Research University, Paris, France
| | - Ahlam A A Hamed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | | | - Maha A Elseed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Mustafa A Salih
- Division of Pediatric Neurology, Department of Pediatrics, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Typhaine Esteves
- Sorbonne Université, Institut du Cerveau-Paris Brain Institute, INSERM, CNRS, Hôpital Pitié-Salpêtrière, Paris, France.,Ecole Pratique des Hautes Etudes, EPHE, PSL Research University, Paris, France
| | - Nicolas Auger
- Sorbonne Université, Institut du Cerveau-Paris Brain Institute, INSERM, CNRS, Hôpital Pitié-Salpêtrière, Paris, France.,Ecole Pratique des Hautes Etudes, EPHE, PSL Research University, Paris, France
| | - Rayan Abubaker
- Department of Molecular Biology, Institute of Endemic Diseases, University of Khartoum, Khartoum, Sudan
| | - Mahmoud Koko
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, Tubingen, Germany
| | - Fatima Abozar
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Hiba Malik
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Rawaa Adil
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Sara Emad
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | | | - Razaz Idris
- Letterkenny University Hospital, Letterkenny, Ireland
| | - Isra Z M Eltazi
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Arwa Babai
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Elhami A A Ahmed
- UNESCO Chair on Bioethics, University of Khartoum, Khartoum, Sudan
| | | | - Mathilde Mairey
- Sorbonne Université, Institut du Cerveau-Paris Brain Institute, INSERM, CNRS, Hôpital Pitié-Salpêtrière, Paris, France
| | - Ahmed K M A Ahmed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan.,Department of Molecular Neuroscience, Graduate School of Medicine, Osaka University, Suita, Japan.,Immunology Frontier Research Center, Osaka University, Suita, Japan
| | | | - Alexis Brice
- Sorbonne Université, Institut du Cerveau-Paris Brain Institute, INSERM, CNRS, Hôpital Pitié-Salpêtrière, Paris, France
| | - Muntaser E Ibrahim
- Department of Molecular Biology, Institute of Endemic Diseases, University of Khartoum, Khartoum, Sudan
| | - Ammar E Ahmed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Foudil Lamari
- APHP, Pitié-Salpêtrière Hospital, Metabolic Biochemistry unit, Department of Biochemistry of Neurometabolic Diseases, Paris, France
| | - Giovanni Stevanin
- Sorbonne Université, Institut du Cerveau-Paris Brain Institute, INSERM, CNRS, Hôpital Pitié-Salpêtrière, Paris, France.,Ecole Pratique des Hautes Etudes, EPHE, PSL Research University, Paris, France
| |
Collapse
|
11
|
Yahia A, Chen ZS, Ahmed AE, Emad S, Adil R, Abubaker R, Taha SOMA, Salih MA, Elsayed L, Chan HYE, Stevanin G. A heterozygous mutation in the CCDC88C gene likely causes early-onset pure hereditary spastic paraplegia: a case report. BMC Neurol 2021; 21:78. [PMID: 33602173 PMCID: PMC7890981 DOI: 10.1186/s12883-021-02113-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 10/15/2020] [Accepted: 02/12/2021] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND CCDC88C is a ubiquitously expressed protein with multiple functions, including roles in cell polarity and the development of dendrites in the nervous system. Bi-allelic mutations in the CCDC88C gene cause autosomal recessive congenital hydrocephalus (OMIM #236600). Studies recently linked heterozygous mutations in CCDC88C to the development of the late-onset spinocerebellar ataxia type 40 (OMIM #616053). CASE PRESENTATION A 48-year-old Sudanese female presented with pure early onset hereditary spastic paraplegia. Exome sequencing, in-silico analysis, and Sanger sequencing identified the heterozygous NM_001080414.4:c.1993G > A (p.E665K) variant in CCDC88C as a potential cause of her illness. To explore the pathogenicity of the NM_001080414.4:c.1993G > A (p.E665K) variant, we expressed it in human embryonic kidney 293 cells and assessed its effects on apoptosis. In our experiment, NM_001080414.4:c.1993G > A (p.E665K) induced JNK hyper-phosphorylation and enhanced apoptosis. In contrast to previous reports, our patient developed neurological symptoms in early childhood and showed neither features of cerebellar ataxia, extrapyramidal signs, nor evidence of intellectual involvement. CONCLUSION We, herein, heighlighted the possibility of extending the phenotype associated with variants in CCDC88C to include early-onset pure hereditary spastic paraplegia.
Collapse
Affiliation(s)
- Ashraf Yahia
- Department of Biochemistry, Faculty of Medicine, University of Khartoum, Alqsr Street, Khartoum, Sudan
- Department of Biochemistry, Faculty of Medicine, National University, Khartoum, Sudan
- Institut du Cerveau, INSERM U1127, CNRS UMR7225, Sorbonne Université, Paris, France
| | - Zhefan Stephen Chen
- School of Life Sciences, Faculty of Science, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, SAR, China
| | - Ammar E Ahmed
- Department of Physiology, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Sara Emad
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Rawaa Adil
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Rayan Abubaker
- Institute of Endemic Diseases, University of Khartoum, Khartoum, Sudan
| | | | - Mustafa A Salih
- Division of Pediatric Neurology, Department of Pediatrics, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Liena Elsayed
- Department of Biochemistry, Faculty of Medicine, University of Khartoum, Alqsr Street, Khartoum, Sudan.
| | - Ho Yin Edwin Chan
- School of Life Sciences, Faculty of Science, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, SAR, China
- Gerald Choa Neuroscience Centre, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, SAR, China
| | - Giovanni Stevanin
- Institut du Cerveau, INSERM U1127, CNRS UMR7225, Sorbonne Université, Paris, France
- Ecole Pratique des Hautes Etudes, EPHE, PSL Research University, Paris, France
| |
Collapse
|
12
|
Elsayed LEO, Mohammed IN, Hamed AAA, Elseed MA, Salih MAM, Yahia A, Abubaker R, Koko M, Abd Allah ASI, Elbashir MI, Ibrahim ME, Brice A, Ahmed AE, Stevanin G. Novel Homozygous Missense Mutation in the ARG1 Gene in a Large Sudanese Family. Front Neurol 2020; 11:569996. [PMID: 33193012 PMCID: PMC7658625 DOI: 10.3389/fneur.2020.569996] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 09/25/2020] [Indexed: 12/16/2022] Open
Abstract
Background: Arginases catalyze the last step in the urea cycle. Hyperargininemia, a rare autosomal-recessive disorder of the urea cycle, presents after the first year of age with regression of milestones and evolves gradually into progressive spastic quadriplegia and cognitive dysfunction. Genetic studies reported various mutations in the ARG1 gene that resulted in hyperargininemia due to a complete or partial loss of arginase activity. Case Presentation: Five patients from an extended highly consanguineous Sudanese family presented with regression of the acquired milestones, spastic quadriplegia, and mental retardation. The disease onset ranged from 1 to 3 years of age. Two patients had epileptic seizures and one patient had stereotypic clapping. Genetic testing using whole-exome sequencing, done for the patients and a healthy parent, confirmed the presence of a homozygous novel missense variant in the ARG1 gene [GRCh37 (NM_001244438.1): exon 4: g.131902487T>A, c.458T>A, p.(Val153Glu)]. The variant was predicted pathogenic by five algorithms and affected a highly conserved amino acid located in the protein domain ureohydrolase, arginase subgroup. Sanger sequencing of 13 sampled family members revealed complete co-segregation between the variant and the disease distribution in the family in line with an autosomal-recessive mode of inheritance. Biochemical analysis confirmed hyperargininemia in five patients. Conclusion: This study reports the first Sudanese family with ARG1 mutation. The reported variant is a loss-of-function missense mutation. Its pathogenicity is strongly supported by the clinical phenotype, the computational functional impact prediction, the complete co-segregation with the disease, and the biochemical assessment.
Collapse
Affiliation(s)
- Liena E O Elsayed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan.,College of Medicine, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia.,Institut du Cerveau, INSERM, CNRS, Sorbonne Université, Paris, France
| | | | - Ahlam A A Hamed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Maha A Elseed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Mustafa A M Salih
- Division of Pediatric Neurology, Department of Pediatrics, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Ashraf Yahia
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan.,Institut du Cerveau, INSERM, CNRS, Sorbonne Université, Paris, France.,Department of Biochemistry, Faculty of Medicine, National University, Khartoum, Sudan.,Ecole Pratique des Hautes Etudes, EPHE, PSL Research University, Paris, France
| | - Rayan Abubaker
- Department of Molecular Biology, Institute of Endemic Diseases, University of Khartoum, Khartoum, Sudan
| | - Mahmoud Koko
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, Tuebingen, Germany
| | | | | | - Muntaser E Ibrahim
- Department of Molecular Biology, Institute of Endemic Diseases, University of Khartoum, Khartoum, Sudan
| | - Alexis Brice
- Institut du Cerveau, INSERM, CNRS, Sorbonne Université, Paris, France.,APHP, Pitié-Salpêtrière Hospital, Department of genetics, Paris, France
| | - Ammar E Ahmed
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Giovanni Stevanin
- Institut du Cerveau, INSERM, CNRS, Sorbonne Université, Paris, France.,Ecole Pratique des Hautes Etudes, EPHE, PSL Research University, Paris, France.,APHP, Pitié-Salpêtrière Hospital, Department of genetics, Paris, France
| |
Collapse
|
13
|
Abubaker R. P-1068 - A case report of neuroleptic malignant syndrome. Eur Psychiatry 2012. [DOI: 10.1016/s0924-9338(12)75235-5] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
|