Influence of ?S-globin haplotypes and hydroxyurea on tumor necrosis factor-alpha levels in sickle cell anemia
Rev. bras. hematol. hemoter
; 36(2): 121-125, Mar-Apr/2014. tab, graf
Article
em En
| LILACS
| ID: lil-710200
Biblioteca responsável:
BR408.1
ABSTRACT
Background:
Sickle cell anemia is a chronic inflammatory disease characterized by an increased production of proinflammatory cytokines including tumor necrosis factor-alpha. Hydroxyurea, by decreasing the polymerization of hemoglobin, reduces inflammatory states. The effect of the genetic polymorphisms of sickle cell patients on tumor necrosis factor-alpha levels remains unknown.Objective:
The aim of this study was to investigate the association of tumor necrosis factor-alpha levels with β-globin haplotypes and the use of hydroxyurea.Methods:
A cross-sectional study was performed of 67 patients with sickle cell anemia diagnosed at steady-state in a referral hospital in Fortaleza, Ceará, Brazil. A group of 26 healthy individuals was used as control. βS-haplotype analysis was performed by restriction fragment length polymorphism-polymerase chain reaction. The tumor necrosis factor-alpha levels were measured by the enzyme-linked immunosorbent assay test. Laboratory data (complete blood count and fetal hemoglobin) and information regarding the use of hydroxyurea were obtained from medical records. Statistical analysis was performed using R software with the Kruskal-Wallis and Mann-Whitney tests. Statistical significance was established for p-values < 0.05 for all analyses.Results:
The mean age of the participants was 35.48 years. Patients with sickle cell anemia had significantly higher tumor necrosis factor-alpha levels than controls (p-values < 0.0001). Tumor necrosis factor-alpha levels were lower in sickle cell anemia patients who were receiving hydroxyurea treatment than those who were not (p-value = 0.1249). Sickle cell anemia patients with Bantu/n genotype had significantly higher levels than patients with the Bantu/Benin genotype (p-value = 0.0021).Conclusion:
In summary, βS-globin haplotypes, but not hydroxyurea therapy, have a role in modulating tumor necrosis factor-alpha levels in sickle cell anemia adults at steady-state...Palavras-chave
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Coleções:
01-internacional
Base de dados:
LILACS
Tipo de estudo:
Observational_studies
/
Risk_factors_studies
Limite:
Adolescent
/
Female
/
Humans
/
Male
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article