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Qazi TJ, Wu Q, Aierken A, Lu D, Bukhari I, Hussain HMJ, Yang J, Mir A, Qing H. Whole-exome sequencing identifies a novel mutation in spermine synthase gene (SMS) associated with Snyder-Robinson Syndrome. BMC Med Genet 2020; 21:168. [PMID: 32838743 PMCID: PMC7446199 DOI: 10.1186/s12881-020-01095-x] [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] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 07/26/2020] [Indexed: 11/10/2022]
Abstract
BACKGROUND Loss of function mutations in the spermine synthase gene (SMS) have been reported to cause a rare X-linked intellectual disability known as Snyder-Robinson Syndrome (SRS). Besides intellectual disability, SRS is also characterized by reduced bone density, osteoporosis and facial dysmorphism. SRS phenotypes evolve with age from childhood to adulthood. METHODS Whole exome sequencing was performed to know the causative gene/pathogenic variant. Later we confirmed the pathogenic variant through Sanger sequencing. Furthermore, we also performed the mutational analysis through HOPE SERVER and SWISS-MODEL. Also, radiographs were also obtained for affected individual to confirm the disease features. RESULTS In this article, we report the first Pakistani family consisting of three patients with SRS and a novel missense pathogenic variant in the SMS gene (c.905 C > T p.(Ser302Leu)). In addition to the typical phenotypes, one patient presented with early-onset seizures. Clinical features, genetic and in-silico analysis linked the affected patients of the family with Snyder-Robinson and suggest that this novel mutation affects the spermine synthase activity. CONCLUSION A novel missense variant in the SMS, c.905C > T p. (Ser302Leu), causing Snyder- Robinson Syndrome (SRS) is reported in three members of Pakistani Family.
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Affiliation(s)
- Talal J Qazi
- Key Laboratory of Molecular Medicine and Biotherapy, Department of Biology, School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Qiao Wu
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, China
| | - Ailikemu Aierken
- Key Laboratory of Molecular Medicine and Biotherapy, Department of Biology, School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Daru Lu
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, China.,Chongqing Population and Family Planning, Science and Technology Research Institute, National Health and Family Planning Commission, Chongqing, China
| | - Ihtisham Bukhari
- Key Laboratory of Helicobacter pylori and Microbiota and GI Cancer in Henan Province, Marshall Medical Research Center of Zhengzhou University, The 5th affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Hafiz M J Hussain
- Department of Nephrology, Institute of Nephrology, Shanghai Ruijin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Jingmin Yang
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, China.,Chongqing Population and Family Planning, Science and Technology Research Institute, National Health and Family Planning Commission, Chongqing, China.,Shanghai WeHealth Biomedical Technology Co., Ltd., Shanghai, China
| | - Asif Mir
- Department of Biological Sciences, FBAS, International Islamic University, Islamabad, Pakistan.
| | - Hong Qing
- Key Laboratory of Molecular Medicine and Biotherapy, Department of Biology, School of Life Science, Beijing Institute of Technology, Beijing, China.
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