Changes in the kinetics of plasma chemiluminescence as a measure of systemic oxidative stress in humans

Resumo

Oxidative stress acts as a pathogenetic factor in many diseases; estimating its level is important for early diagnosis and therapy adjustment. The antioxidant status was evaluated for the blood plasma. A set of chemiluminescence (CL) kinetic-curve parameters (latent period τ_lat and analytical signal increment ΔI_CL) in a 2,2’-azo-bis(2-amidinopropane)dihydrochloride–luminol system were proposed for estimating the oxidative stress level. Uric acid and albumin were identified as major components that are responsible for the changes in the plasma CL kinetic curve. UV light caused oxidative modification of serum albumin in a dose-dependent manner, thus enhancing its antioxidant properties. Changes in plasma CL kinetics were proposed as a means to measure oxidative stress in the human body.