Selenium and glutathione peroxidase with beta-thalassemia major.

Abstract:

BACKGROUND:Chronic iron-overload is a major cause of organ failure and mortality worldwide, but its pathogenesis remains to be elucidated. OBJECTIVES:To examine the relationship between various measures of body iron burden, selenium concentrations and glutathione peroxidase (GPx) activity in patients with beta-thalassemia major. METHODS:An age- and gender-matched case control study was conducted to examine the relationship between various measures of body iron burden (serum ferritin, transferrin saturation, total serum iron), plasma concentrations of selenium and glutathione peroxidase (GPx) activity in patients with homozygous beta-thalassemia major (N = 20) and healthy controls (N = 10). Ten patients received the experimental oral chelator L1 and ten received chelation therapy with subcutaneous desferal. RESULTS:Significantly decreased plasma concentrations of selenium (microg/L) were observed in patients chelated with L1 (1.4 +/- 0.2) or desferal (1.4 +/- 0.1), in comparison to healthy controls (1.8 +/- 0.1, p < 0.01). Significantly decreased plasma activity of GPx (microg/L) was observed in patients chelated with L1 (166 +/- 43) or desferal (178 +/- 46), in comparison to healthy controls (296 +/- 22, p < 0.001). Significantly increased concentrations of all measures of body iron burden were observed in beta-thalassemia patients, in comparison to healthy controls (p < 0.001). CONCLUSION:Patients with beta-thalassemia major and chronic iron-overload have decreased concentrations of the essential element selenium and the protective selenium-dependent antioxidant enzyme GPx. Additional research examining the effects of dietary antioxidant supplementation with selenium on these aforementioned parameters in patients with beta-thalassemia major and iron-overload is warranted.

journal_name

Nurs Res

journal_title

Nursing research

authors

Bartfay WJ,Bartfay E

doi

10.1097/00006199-200105000-00009

keywords:

subject

Has Abstract

pub_date

2001-05-01 00:00:00

pages

178-83

issue

3

eissn

0029-6562

issn

1538-9847

journal_volume

50

pub_type

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