1. HbA2:c.96-2A > G mutation: report of 7 cases in China.
- Author
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Yu, Xiao-Hua, Ge, Yi-Yuan, Ma, Xiao-Min, Zeng, Guang-Kuan, Liao, Yu-Wei, Liu, Li-Li, Cao, Yan-Bin, Liang, Jian-Lian, Lai, Bai-Ru, Zeng, Yan-Qing, Huang, Yu-Chan, and Yang, Li-Ye
- Abstract
Objective: To analyze the hematological phenotype and genotype of HbA2: c.96-2A > G carriers. Methods: The blood routine parameters and hemoglobin electrophoresis of rare cases were analyzed and identified by PCR combined with reverse dot blot (RBD-PCR), GAP-PCR and DNA sequencing. Results: Among the 7 patients, one adult patient had normal hemoglobin levels, with slightly decreased mean corpuscular volume (MCV) and mean corpuscular hemoglobin (MCH). Hb Bart's band was found in 6 neonates by hemoglobin electrophoresis, of which the content of Hb Bart's band in 1 neonate was 15.80%, and the content of Hb Bart's band in the other 5 neonates was 0.30%–0.90%. The results of genetic analysis showed that all the 7 patients had HbA2: c.96-2A > G (IVS-I-116A > G) mutation, in which 1 case was compounded with –
SEA deletion. Conclusion: HbA2: c.96-2A > G mutation carriers exhibit the phenotype of α-thalassemia, and when the HbA2:c.96-2A > G mutation is combined with –SEA deletion, an intermediate phenotype of anemia is produced. [ABSTRACT FROM AUTHOR]- Published
- 2024
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