The -α3.7III subtype of α+-thalassemia was identified in China.
Hematology
; 27(1): 826-830, 2022 Dec.
Article
en En
| MEDLINE
| ID: mdl-35916627
ABSTRACT
OBJECTIVE:
The 3.7â kb deletion (-α3.7) in the α-globin cluster, which characterizes α+-thalassemia, has been reported to have a carrier rate of 4.78% in southern China. Three -α3.7 subtypes have been identified worldwide. However, the -α3.7 III subtype has not previously been identified in China. Herein, we reported identification of the -α3.7 III subtype in a Chinese patient.METHODS:
We used gap-PCR and a liquid chip system to detect α-thalassemia mutations. Multiple ligation-dependent probe amplification was performed to detect the large deletion. We finally used Sanger sequencing and single molecule real-time sequencing to characterize and confirm the genotype.RESULTS:
The proband, characterized as -α3.7 III heterozygous, showed microcytosis and hypochromic red cells, with a mean corpuscular volume of 78 fL and mean corpuscular hemoglobin of 25.4 pg. The proband's mutation was inherited from her father, who had normal blood parameters.CONCLUSION:
We first identified the -α3.7 III subtype in China. Consequently, all -α3.7 subtypes have now been identified in the Chinese population. Therefore, attention should be paid to -α3.7 III in clinical prenatal diagnosis, given that commonly used methods such as gap-PCR may lead to misdiagnosis or missed diagnosis.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Talasemia alfa
Tipo de estudio:
Diagnostic_studies
/
Prognostic_studies
Límite:
Female
/
Humans
/
Pregnancy
País/Región como asunto:
Asia
Idioma:
En
Revista:
Hematology
Asunto de la revista:
HEMATOLOGIA
Año:
2022
Tipo del documento:
Article