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Zhang J, Xie M, Peng Z, Zhou X, Zhao T, Jin C, Yan Y, Zeng X, Li D, Zhang Y, Su J, Feng N, He J, Yao X, Lv T, Zhu B. Five novel globin gene mutations identified in five Chinese families by next-generation sequencing. Mol Genet Genomic Med 2021; 9:e1835. [PMID: 34708592 PMCID: PMC8683637 DOI: 10.1002/mgg3.1835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 07/13/2021] [Accepted: 09/28/2021] [Indexed: 11/24/2022] Open
Abstract
Background Thalassemia is one of the most common inherited diseases worldwide. This report presents three novel cases of α‐thalassemia and two novel cases of β‐thalassemia caused by five different mutations in the globin gene. Methods Next‐generation sequencing (NGS) was used to identify novel α‐ and β‐thalassemia in five individuals, which was confirmed by Sanger sequencing of the globin gene. Hematological parameters were determined by an automated cell counter, and hemoglobin electrophoresis was carried out by a capillary electrophoresis system, respectively. The isoelectric point (pI), molecular weight, and conservation for the mutations were described by the Internet software programs. The pathogenicity for globin mutations was analyzed by bioinformatics analysis and relative quantitative analysis. Results NGS revealed five novel cases of α‐ and β‐thalassemia: HBA2:c.245C>T, HBA2:c.95+11_95+34delCTCCCCTGCTCCGACCCGGGCTCC, HBA2:c.54delC, HBB:c.373C>A, and HBB:c.40G>A. The clinical implications of these mutations were described. Computational predictions were made for pI, amino acid conservation, and pathogenicity of the missense mutation. Relative quantitative data of the α‐globin mRNA were analyzed. Conclusion Five novel globin mutations were identified in the populations of China, and those mutations were analyzed to provide a mechanistic view for their pathogenicity. These analyzed results improve genetic diagnostics for thalassemia, which can improve screening programs for thalassemia and prenatal diagnosis for Chinese population.
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Affiliation(s)
- Jie Zhang
- Department of Medical Genetics, Yunnan Provincial Key Laboratory for Birth Defects and Genetic Diseases, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China.,Department of Obstetrics and Gynecology, Yunnan Provincial Clinical Research Center for Birth Defects and Rare Diseases, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China.,Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China.,Department of Hematology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Meijuan Xie
- Department of Medical Genetics, Yunnan Provincial Key Laboratory for Birth Defects and Genetic Diseases, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Zhiyu Peng
- BGI Genomics, BGI-Shenzhen, Shenzhen, Guangdong, China
| | - Xiaoyan Zhou
- Department of Medical Genetics, Yunnan Provincial Key Laboratory for Birth Defects and Genetic Diseases, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China.,Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Tingting Zhao
- Department of Medical Genetics, Yunnan Provincial Key Laboratory for Birth Defects and Genetic Diseases, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China.,Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Chanchan Jin
- Department of Medical Genetics, Yunnan Provincial Key Laboratory for Birth Defects and Genetic Diseases, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China.,Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Yuanlong Yan
- Department of Medical Genetics, Yunnan Provincial Key Laboratory for Birth Defects and Genetic Diseases, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Xiaohong Zeng
- Department of Medical Genetics, Yunnan Provincial Key Laboratory for Birth Defects and Genetic Diseases, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Dongmei Li
- Department of Medical Genetics, Yunnan Provincial Key Laboratory for Birth Defects and Genetic Diseases, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Yangjia Zhang
- Department of Medical Genetics, Yunnan Provincial Key Laboratory for Birth Defects and Genetic Diseases, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Jie Su
- Department of Medical Genetics, Yunnan Provincial Key Laboratory for Birth Defects and Genetic Diseases, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Na Feng
- Department of Medical Genetics, Yunnan Provincial Key Laboratory for Birth Defects and Genetic Diseases, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Jing He
- Department of Medical Genetics, Yunnan Provincial Key Laboratory for Birth Defects and Genetic Diseases, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China.,Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Xiangmei Yao
- Department of Hematology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Tao Lv
- Department of Medical Genetics, Yunnan Provincial Key Laboratory for Birth Defects and Genetic Diseases, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China.,Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Baosheng Zhu
- Department of Medical Genetics, Yunnan Provincial Key Laboratory for Birth Defects and Genetic Diseases, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China.,Department of Obstetrics and Gynecology, Yunnan Provincial Clinical Research Center for Birth Defects and Rare Diseases, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China.,Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
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