Hb Bart's levels in cord blood and alpha-thalassemia mutations in Cyprus.
Hemoglobin
; 24(3): 171-80, 2000 Aug.
Article
em En
| MEDLINE
| ID: mdl-10975437
ABSTRACT
The purpose of this study was to examine the frequency of alpha-thalassemia in the population of Cyprus using cord blood samples. The levels of Hb Bart's were compared with the hematological indices and the results correlated with the presence of alpha-thalassemia mutations. The protocols for the polymerase chain reaction detection of the six most common alpha-globin mutations encountered in Cyprus were optimized, and the frequency of each mutation was determined through the screening of 495 random cord blood samples. The total allele frequency for the mutations examined was 10.6%, of which 1% is due to the triplication of the alpha-globin genes. The -alpha(3.7 kb) deletion accounts for 72.8% of all detectable mutations, while the--MED-I and -(alpha)-20.5 kb mutations account for 7.8%. The level of Hb Bart's and the MCV and MCH values in cord blood samples were found to correlate closely with the severity of alpha-thalassemia, although the -alpha(3.7 kb) deletion and perhaps other mild alpha-thalassemia mutations may not give detectable Hb Bart's levels. A reasonably accurate estimate of the alpha-thalassemia carrier frequency may be obtained from cord blood studies if Hb Bart's estimates are combined with hematological indices. When molecular methods are added, these give the best way to use cord bloods to survey populations for alpha-thalassemia.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Hemoglobinas Anormais
/
Talassemia alfa
/
Sangue Fetal
/
Mutação
Limite:
Humans
País/Região como assunto:
Europa
Idioma:
En
Revista:
Hemoglobin
Ano de publicação:
2000
Tipo de documento:
Article