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A Novel Mutation at HBB: c.91delA (Codon 30, –A) Causing β-Thalassemia in a Chinese Family.
- Source :
-
Acta Haematologica . 2019, Vol. 142 Issue 4, p249-252. 4p. 2 Charts, 1 Graph. - Publication Year :
- 2019
-
Abstract
- β-Thalassemia is a genetic disease characterized by the defective synthesis of the hemoglobin tetramer β-globin chains. So far, a number of mutations have been identified and associated with this genetic disease. A high incidence of thalassemia has been found in Guangxi (China). Herein, we report a case of a patient with slightly increased HbA2 levels (4.6%). Based on the clinical data and laboratory findings, the patient was diagnosed with β-thalassemia. Routine genetic screening tests were negative. Sequencing revealed an A deletion at codon 30 (HBB: c.91delA) and the genotype of this patient was βCD30M/β. This mutation changes the splice receptor site of intron 1 from AG to GG, which likely abolishes splicing at the normal 5′ splicing site and may cause β0-thalassemia. Based on hematological and clinical evaluations, this novel mutation was regarded as a β0-thalassemia allele. A homozygosity or compound heterozygosity of this mutation and other β0-thalassemia alleles can lead to severe thalassemia disease. [ABSTRACT FROM AUTHOR]
- Subjects :
- *GENETIC testing
*GENETIC disorders
*HOMOZYGOSITY
*HETEROZYGOSITY
*THALASSEMIA
Subjects
Details
- Language :
- English
- ISSN :
- 00015792
- Volume :
- 142
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Acta Haematologica
- Publication Type :
- Academic Journal
- Accession number :
- 139564709
- Full Text :
- https://doi.org/10.1159/000499860