The effect of allopurinol administration on mitochondrial respiration and gene expression of xanthine oxidoreductase, inducible nitric oxide synthase, and inflammatory cytokines in selected tissues of broiler chickens

Poultry Science
T SettleHillar Klandorf

Abstract

Birds have a remarkable longevity for their body size despite an increased body temperature, higher metabolic rate, and increased blood glucose concentrations compared to most mammals. As the end-product of purine degradation, uric acid (UA) is generated in the xanthine/hypoxanthine reactions catalyzed by xanthine oxidoreductase (XOR). In the first study, Cobb × Cobb broilers (n = 12; 4 weeks old) were separated into 2 treatments (n = 6); control (CON) and allopurinol (AL) 35 mg/kg BW (ALLO). The purpose of this study was to assess mitochondrial function in broiler chickens in response to potential oxidative stress generated from the administration of AL for 1 wk. There was a significant reduction in state 3 respiration (P = 0.01) and state 4 respiration (P = 0.007) in AL-treated birds compared to the controls. The purpose of the second study was to assess the effect of AL on gene expression of inflammatory cytokines interferon-γ (IFN)-γ, IL-1β, IL-6, and IL-12p35, as well as inducible nitric oxide synthase and XOR in liver tissue. Cobb × Cobb broilers were separated into two groups at 4 wk age (n = 10); CON and ALLO. After 1 wk AL treatment, half of the birds in each group (CON 1 and ALLO 1) were euthanized while the remaining...Continue Reading

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