Variant analysis for patients from Fujian area with Hong Kong αα type thalassemia / 中华医学遗传学杂志
Chinese Journal of Medical Genetics
;
(6): 297-300, 2019.
Article
in Chinese
| WPRIM
| ID: wpr-772022
ABSTRACT
OBJECTIVE@#To determine the frequency of Hong Kong αα (HK αα) gene in α3.7 positive samples among carriers from Fujian area.@*METHODS@#Routine genetic testing for thalassemia was carried out for 10145 patients with positive screening results. Single PCR and two-round nested PCR were utilized to detect HK αα among 507 patients with α3.7/αα and 2 patients for whom electrophoresis showed α3.7, -αSEA and normal α2 alleles. Reverse dot blot test was used for detecting non-deletional α-thalassemia and β-thalassemia variants.@*RESULTS@#Among the 507 patients with α3.7/αα, HK αα was identified in 35 cases, which included 25 HK αα/αα, 5 HK αα/α3.7, 4 HK αα/αα with heterozygous CD41/42 (HBB c.126_129delCTTT) variant, 1 HK αα/αα with IVS-II-654 (HBB c.316_197C>T) heterozygous variant. One patient was confirmed to have α3.7/anti4.2 genotype. The two cases with α3.7, -αSEA and normal α2 alleles were confirmed to be HK αα/--SEA. The frequency of HK αα genotype in Fujian area was therefore 7.27% among patients with α3.7 and 0.36% in the general population.@*CONCLUSION@#A certain proportion of HK αα has been detected in Fujian area, which will enable more accurate diagnosis and genetic counseling.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Beta-Thalassemia
/
Alpha-Thalassemia
/
Genotype
/
Heterozygote
/
Hong Kong
Limits:
Humans
Country/Region as subject:
Asia
Language:
Chinese
Journal:
Chinese Journal of Medical Genetics
Year:
2019
Type:
Article
Similar
MEDLINE
...
LILACS
LIS