کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1910527 1046775 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Protective role of glutathione S-transferase A4 induced in copper/zinc-superoxide dismutase knockout mice
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی سالمندی
پیش نمایش صفحه اول مقاله
Protective role of glutathione S-transferase A4 induced in copper/zinc-superoxide dismutase knockout mice
چکیده انگلیسی
Copper/zinc-superoxide dismutase (SOD1) plays a protective role in cells by catalyzing the conversion of the superoxide anion into molecular oxygen and hydrogen peroxide. Although SOD1 knockout (KO) mice exhibit a reduced life span and an elevated incidence of dysfunctions in old age, young SOD1 KO mice grow normally and exhibit no abnormalities. This fact leads to the hypothesis that other antioxidative proteins prevent oxidative stress, compensating for SOD1. Differently expressed genes in 3-week-old SOD1 KO and littermate wild-type mice were explored. A gene remarkably elevated in SOD1 KO mouse kidneys was identified as the glutathione S-transferase Alpha 4 gene (Gsta4), which encodes the GSTA4 subunit. The GSTA4 protein level and activity were also significantly increased in SOD1 KO mouse kidneys. The administration of an iron complex, a free radical generator, induced GSTA4 expression in wild-type mouse kidneys. Iron deposition detected in SOD1 KO mouse kidney is thought to be an inducer of GSTA4. In addition, overexpression of mouse GSTA4 cDNA in human embryonic kidney cells decreased cell death caused by both 4-hydroxynonenal and hydrogen peroxide. These findings suggest that compensatory induced GSTA4 plays a protective role against oxidative stress in young SOD1 KO mouse kidneys.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Free Radical Biology and Medicine - Volume 47, Issue 5, 1 September 2009, Pages 559-567
نویسندگان
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