Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/100568
Type: Artigo de periódico
Title: Presence Of Allele α(lely) In An Amazonian Indian Population
Author: Basseres D.S.
Salles T.S.I.
Costa F.F.
Saad S.T.O.
Abstract: Allele α(LELY) is a low-expression allele of the erythroid spectrin α- chain that is characterized by a C → G mutation at position α1857 in exon 40 and a C → T (nt -12) mutation in intron 45. This second mutation is probably responsible for the partial skipping of exon 46. This exon is essential for the nucleation of the α-chains by the β-chains during erythropoeisis. Although allele α(LELY) remains asymptomatic in both heterozygotes and homozygotes, it enhances the expression of deleterious α- alleles that occur and, as such, has clinical importance. In this study, the frequency of allele α(LELY) was estimated in two ethnically different Brazilian populations: a random sample of blood donors from Campinas, a city located in Sao Paulo State, in the southeastern region of Brazil, and a sample of Parakana Indians (Tupi tribe), a very isolated population with a high degree of inbreeding. The frequency of allele α(LELY) in the blood donor's sample (n = 54) was 24.1% whereas in the indigenous sample (n = 41), it was 15.9%. These frequencies were not significantly different at the 5% level (χ2 = 1.931). Similarly, when the frequencies of our samples were compared with those of the four ethnic groups studied by Marechal et al. [Br J Haematol 90:553-556, 1995], no significant differences were found at the 5% level (χ2 = 6.686). These results suggest that allele α(LELY) is a very ancient allele since it occurs with a relatively uniform and high frequency in all human ethnic groups studied so far. These findings confirm the importance of allele α(LELY) in influencing the expression of deleterious α-spectrin alleles. To our knowledge, these are the first data concerning allele α(LELY) in native Americans.
Editor: 
Rights: fechado
Identifier DOI: 10.1002/(SICI)1096-8652(199803)57:3<212::AID-AJH5>3.0.CO;2-Y
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-0031594459&partnerID=40&md5=f2658e97f294d9c066777bd9ce2dcdaf
Date Issue: 1998
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
2-s2.0-0031594459.pdf28.6 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.