File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Clinical phenotype of triplicated alpha-globin genes and heterozygosity for beta0-thalassemia in Chinese subjects.

TitleClinical phenotype of triplicated alpha-globin genes and heterozygosity for beta0-thalassemia in Chinese subjects.
Authors
Issue Date2001
PublisherDemetrios A Spandidos Ed & Pub. The Journal's web site is located at http://147.52.72.117/IJMM/ijmm.htm
Citation
International Journal Of Molecular Medicine, 2001, v. 8 n. 2, p. 171-175 How to Cite?
AbstractThe presence of extra copies of alpha-globin gene has been shown to worsen the degree of anemia in beta-thalassemia heterozygotes. We describe the clinical phenotype of eight Chinese subjects with heterozygosity for both triplicated alpha-globin gene and a beta0-thalassemia allele. They were identified through genotyping of beta-thalassemia intermedia and major patients, and through community-based thalassemia screening program in Hong Kong. Standard molecular techniques were used in the determination of genotype. All subjects in this series showed five copies of alpha-globin genes (alphaalphaalpha/alphaalpha) in association with a beta0-thalassemia allele. Although genotypically identical, six subjects showed a beta-thalassemia intermedia phenotype while two were clinically indistinguishable from beta-thalassemia minor, implying the presence of genetic modifying factors that remained undefined. Triplication of alpha-globin gene and heterozygosity for beta0-thalassemia accounted for 15% of beta-thalassemia intermedia patients at our locality and was associated with a mild clinical phenotype. This genotype was not found among beta-thalassemia major patients. They presented in adulthood and were usually not transfusion dependent. When compared with simple beta-thalassemia heterozygotes, they showed obvious red cell abnormalities (hypochromasia, anisopoikilocytosis, circulating normoblasts), lower hemoglobin (Hb) and higher HbF levels. The presence of triplicated alpha-globin genes should always be considered in apparent beta-thalassemia carriers who were more symptomatic than expected, so that unnecessary investigations for the cause of anemia could be avoided. Finally, triplication of alpha-globin genes should be looked for in families with children affected by beta-thalassemia intermedia in which only one parent showed a picture of beta-thalassemia on Hb analysis.
Persistent Identifierhttp://hdl.handle.net/10722/148254
ISSN
2015 Impact Factor: 2.348
2015 SCImago Journal Rankings: 0.868
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorMa, SKen_US
dc.contributor.authorAu, WYen_US
dc.contributor.authorChan, AYen_US
dc.contributor.authorChan, LCen_US
dc.date.accessioned2012-05-29T06:11:49Z-
dc.date.available2012-05-29T06:11:49Z-
dc.date.issued2001en_US
dc.identifier.citationInternational Journal Of Molecular Medicine, 2001, v. 8 n. 2, p. 171-175en_US
dc.identifier.issn1107-3756en_US
dc.identifier.urihttp://hdl.handle.net/10722/148254-
dc.description.abstractThe presence of extra copies of alpha-globin gene has been shown to worsen the degree of anemia in beta-thalassemia heterozygotes. We describe the clinical phenotype of eight Chinese subjects with heterozygosity for both triplicated alpha-globin gene and a beta0-thalassemia allele. They were identified through genotyping of beta-thalassemia intermedia and major patients, and through community-based thalassemia screening program in Hong Kong. Standard molecular techniques were used in the determination of genotype. All subjects in this series showed five copies of alpha-globin genes (alphaalphaalpha/alphaalpha) in association with a beta0-thalassemia allele. Although genotypically identical, six subjects showed a beta-thalassemia intermedia phenotype while two were clinically indistinguishable from beta-thalassemia minor, implying the presence of genetic modifying factors that remained undefined. Triplication of alpha-globin gene and heterozygosity for beta0-thalassemia accounted for 15% of beta-thalassemia intermedia patients at our locality and was associated with a mild clinical phenotype. This genotype was not found among beta-thalassemia major patients. They presented in adulthood and were usually not transfusion dependent. When compared with simple beta-thalassemia heterozygotes, they showed obvious red cell abnormalities (hypochromasia, anisopoikilocytosis, circulating normoblasts), lower hemoglobin (Hb) and higher HbF levels. The presence of triplicated alpha-globin genes should always be considered in apparent beta-thalassemia carriers who were more symptomatic than expected, so that unnecessary investigations for the cause of anemia could be avoided. Finally, triplication of alpha-globin genes should be looked for in families with children affected by beta-thalassemia intermedia in which only one parent showed a picture of beta-thalassemia on Hb analysis.en_US
dc.languageengen_US
dc.publisherDemetrios A Spandidos Ed & Pub. The Journal's web site is located at http://147.52.72.117/IJMM/ijmm.htmen_US
dc.relation.ispartofInternational journal of molecular medicineen_US
dc.subject.meshAdolescenten_US
dc.subject.meshAdulten_US
dc.subject.meshAgeden_US
dc.subject.meshAged, 80 And Overen_US
dc.subject.meshAsian Continental Ancestry Groupen_US
dc.subject.meshFemaleen_US
dc.subject.meshGlobins - Geneticsen_US
dc.subject.meshHeterozygoteen_US
dc.subject.meshHumansen_US
dc.subject.meshMaleen_US
dc.subject.meshMiddle Ageden_US
dc.subject.meshPhenotypeen_US
dc.subject.meshBeta-Thalassemia - Geneticsen_US
dc.titleClinical phenotype of triplicated alpha-globin genes and heterozygosity for beta0-thalassemia in Chinese subjects.en_US
dc.typeArticleen_US
dc.identifier.emailChan, LC:chanlc@hkucc.hku.hken_US
dc.identifier.authorityChan, LC=rp00373en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.pmid11445869-
dc.identifier.scopuseid_2-s2.0-0035434205en_US
dc.identifier.volume8en_US
dc.identifier.issue2en_US
dc.identifier.spage171en_US
dc.identifier.epage175en_US
dc.identifier.isiWOS:000169872700008-
dc.publisher.placeGreeceen_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats