Oxidative stress and antioxidant status in beta-thalassemia heterozygotes


Autoria(s): Ondei, Luciana de Souza; Estevao, Isabeth da Fonseca; Rocha, Marina Ibelli Pereira; Percario, Sandro; Souza, Doroteia Rossi Silva; Pinhel, Marcela Augusta de Souza; Bonini-Domingos, Claudia Regina
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

30/09/2014

30/09/2014

2013

Resumo

Background:Several studies have evaluated the oxidant and antioxidant status of thalassemia patients but most focused mainly on the severe and intermediate states of the disease. Moreover, the oxidative status has not been evaluated for the different beta-thalassemia mutations.Objective:To evaluate lipid peroxidation and Trolox equivalent antioxidant capacity in relation to serum iron and ferritin in beta thalassemia resulting from two different mutations (CD39 and IVS-I-110) compared to individuals without beta-thalassemia.Methods:One hundred and thirty subjects were studied, including 49 who were heterozygous for beta-thalassemia and 81 controls. Blood samples were subjected to screening tests for hemoglobin. Allele-specific polymerase chain reaction was used to confirm mutations for beta-thalassemia, an analysis of thiobarbituric acid reactive species was used to determine lipid peroxidation, and Trolox equivalent antioxidant capacity evaluations were performed. The heterozygous beta-thalassemia group was also evaluated for serum iron and ferritin status.Results:Thiobarbituric acid reactive species (486.24 ± 119.64 ng/mL) and Trolox equivalent antioxidant capacity values (2.23 ± 0.11 mM/L) were higher in beta-thalassemia heterozygotes compared to controls (260.86 ± 92.40 ng/mL and 2.12 ± 0.10 mM/L, respectively; p-value < 0.01). Increased thiobarbituric acid reactive species values were observed in subjects with the CD39 mutation compared with those with the IVS-I-110 mutation (529.94 ± 115.60 ng/mL and 453.39 ± 121.10 ng/mL, respectively; p-value = 0.04). However, average Trolox equivalent antioxidant capacity values were similar for both mutations (2.20 ± 0.08 mM/L and 2.23 ± 0.12 mM/L, respectively; p-value = 0.39). There was no influence of serum iron and ferritin levels on thiobarbituric acid reactive species and Trolox equivalent antioxidant capacity values.Conclusion:This study shows an increase of oxidative stress and antioxidant capacity in beta-thalassemia heterozygotes, mainly in carriers of the CD39 mutation.

Formato

409-413

Identificador

http://dx.doi.org/10.5581/1516-8484.20130122

Revista Brasileira de Hematologia e Hemoterapia. Associação Brasileira de Hematologia e Hemoterapia e daSociedade Brasileira de Transplante de Medula Óssea, v. 35, n. 6, p. 409-413, 2013.

1516-8484

http://hdl.handle.net/11449/109629

10.5581/1516-8484.20130122

S1516-84842013000600409

S1516-84842013000600409.pdf

Idioma(s)

eng

Publicador

Associação Brasileira de Hematologia e Hemoterapia e daSociedade Brasileira de Transplante de Medula Óssea

Relação

Revista Brasileira de Hematologia e Hemoterapia

Direitos

openAccess

Palavras-Chave #Oxidative stress #Beta-thalassemia #Lipid peroxidation #Beta-globins #Thiobarbituric acid reactive substances #Mutation
Tipo

info:eu-repo/semantics/article