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Khan A, Tian S, Tariq M, Khan S, Safeer M, Ullah N, Akbar N, Javed I, Asif M, Ahmad I, Ullah S, Satti HS, Khan R, Naeem M, Ali M, Rendu J, Fauré J, Dieterich K, Latypova X, Baig SM, Malik NA, Zhang F, Khan TN, Liu C. NGS-driven molecular diagnosis of heterogeneous hereditary neurological disorders reveals novel and known variants in disease-causing genes. Mol Genet Genomics 2022; 297:1601-1613. [PMID: 36002593 DOI: 10.1007/s00438-022-01945-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 08/11/2022] [Indexed: 11/28/2022]
Abstract
Hereditary neurological disorders (HNDs) are a clinically and genetically heterogeneous group of disorders. These disorders arise from the impaired function of the central or peripheral nervous system due to aberrant electrical impulses. More than 600 various neurological disorders, exhibiting a wide spectrum of overlapping clinical presentations depending on the organ(s) involved, have been documented. Owing to this clinical heterogeneity, diagnosing these disorders has been a challenge for both clinicians and geneticists and a large number of patients are either misdiagnosed or remain entirely undiagnosed. Contribution of genetics to neurological disorders has been recognized since long; however, the complete picture of the underlying molecular bases are under-explored. The aim of this study was to accurately diagnose 11 unrelated Pakistani families with various HNDs deploying NGS as a first step approach. Using exome sequencing and gene panel sequencing, we successfully identified disease-causing genomic variants these families. We report four novel variants, one each in, ECEL1, NALCN, TBR1 and PIGP in four of the pedigrees. In the rest of the seven families, we found five previously reported pathogenic variants in POGZ, FA2H, PLA2G6 and CYP27A1. Of these, three families segregate a homozygous 18 bp in-frame deletion of FA2H, indicating a likely founder mutation segregating in Pakistani population. Genotyping for this mutation can help low-cost population wide screening in the corresponding regions of the country. Our findings not only expand the existing repertoire of mutational spectrum underlying neurological disorders but will also help in genetic testing of individuals with HNDs in other populations.
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Affiliation(s)
- Ayaz Khan
- National Institute for Biotechnology and Genetic Engineering College, Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Pakistan
| | - Shixiong Tian
- Shanghai Key Laboratory of Metabolic Remodeling and Health, Institute of Metabolism and Integrative Biology, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, Fudan University, Shanghai, 200438, China
| | - Muhammad Tariq
- National Institute for Biotechnology and Genetic Engineering College, Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Pakistan
| | - Sheraz Khan
- National Institute for Biotechnology and Genetic Engineering College, Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Pakistan
| | - Muhammad Safeer
- Department of Biotechnology and Genetic Engineering, Hazara University, Mansehra, Pakistan
| | - Naimat Ullah
- National Institute for Biotechnology and Genetic Engineering College, Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Pakistan
| | - Nazia Akbar
- Department of Biotechnology and Genetic Engineering, Hazara University, Mansehra, Pakistan
| | - Iram Javed
- Department of Paediatric Neurology, Children Hospital and Institute of Child Health, Faisalabad, Pakistan
| | - Mahnoor Asif
- National Institute for Biotechnology and Genetic Engineering College, Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Pakistan
| | - Ilyas Ahmad
- Institute for Cardiogenetics, University of Lübeck, DZHK (German Research Centre for Cardiovascular Research), partner site Hamburg/Lübeck/Kiel, University Heart Center Lübeck, Lübeck, Germany
| | - Shahid Ullah
- Department of General Surgery, Hayatabad Medical Complex, Peshawar, 2500, Pakistan
| | - Humayoon Shafique Satti
- Department of Biological Sciences, National University of Medical Sciences, Rawalpindi, 46000, Pakistan
| | - Raees Khan
- Department of Biological Sciences, National University of Medical Sciences, Rawalpindi, 46000, Pakistan.,NUMS Institute of Advance Studies and Research, National University of Medical Sciences, Rawalpindi, 46000, Pakistan
| | - Muhammad Naeem
- Department of Biological Sciences, National University of Medical Sciences, Rawalpindi, 46000, Pakistan
| | - Mahwish Ali
- Department of Biological Sciences, National University of Medical Sciences, Rawalpindi, 46000, Pakistan.,NUMS Institute of Advance Studies and Research, National University of Medical Sciences, Rawalpindi, 46000, Pakistan
| | - John Rendu
- Inserm, U1216, CHU Grenoble Alpes, Grenoble Institute of Neurosciences, University of Grenoble Alpes, 38000, Grenoble, France
| | - Julien Fauré
- Inserm, U1216, CHU Grenoble Alpes, Grenoble Institute of Neurosciences, University of Grenoble Alpes, 38000, Grenoble, France
| | - Klaus Dieterich
- Inserm, U1209, CHU Grenoble Alpes, Institute of Advanced Biosciences, University of Grenoble Alpes, 38000, Grenoble, France
| | - Xenia Latypova
- Inserm, U1216, CHU Grenoble Alpes, Grenoble Institute of Neurosciences, University of Grenoble Alpes, 38000, Grenoble, France
| | - Shahid Mahmood Baig
- National Institute for Biotechnology and Genetic Engineering College, Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Pakistan.,Pakistan Science Foundation, Constitution Avenue, Islamabad, Pakistan
| | - Naveed Altaf Malik
- National Institute for Biotechnology and Genetic Engineering College, Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Pakistan
| | - Feng Zhang
- Obstetrics and Gynecology Hospital, Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Institute of Reproduction and Development, Fudan University, Shanghai, 200438, China
| | - Tahir Naeem Khan
- Department of Biological Sciences, National University of Medical Sciences, Rawalpindi, 46000, Pakistan. .,NUMS Institute of Advance Studies and Research, National University of Medical Sciences, Rawalpindi, 46000, Pakistan. .,Advanced Center for Translational and Genetic Medicine, Stanley Manne Children's Research Institute, Lurie Children's Hospital, Departments of Pediatrics and Cell and Developmental Biology, Feinberg School of Medicine, Northwestern University, Chicago, United States.
| | - Chunyu Liu
- Obstetrics and Gynecology Hospital, Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Institute of Reproduction and Development, Fudan University, Shanghai, 200438, China.
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