Antioxidant properties of albumin: effect on oxidative metabolism of human neutrophil granulocytes

• Published in: Farmaco (Società chimica italiana : 1989) 1999-10, Vol.54 (10), p.695-699
• Main Authors: Kouoh, Ferdinand, Gressier, Bernard, Luyckx, Michel, Brunet, Claude, Dine, Thierry, Cazin, Micheline, Cazin, Jean Claude
• Format: Article
• Language: English
• Subjects: Animals; Antioxidant properties; Antioxidants - pharmacology; Biological and medical sciences; Bovine serum albumin; Cattle; General and cellular metabolism. Vitamins; Human neutrophil granulocytes; Humans; Hydrogen Peroxide - metabolism; Hypochlorous Acid - metabolism; Medical sciences; Neutrophils - drug effects; Neutrophils - metabolism; Pharmacology. Drug treatments; Serum Albumin, Bovine - pharmacology; Superoxides - metabolism
• ISSN: 0014-827X; 1879-0569
• DOI: 10.1016/S0014-827X(99)00082-8

The present study aims at investigating the effect of bovine serum albumin (BSA) on the trial of oxidative-stress. The antioxidant effects of BSA were determined by human neutrophil granulocytes oxygen free radicals and their by-products (O − 2, H 2O 2, HOCl) productions. BSA interacts with those reactive oxygen species (ROS) in a dose-dependent manner. The 50% inhibitory concentration (IC 50) of BSA estimated, after phorbol-12-myristate-13-acetate (PMA) stimulation were: 33.5 mg/ml for O − 2, 6.5 mg/ml for H 2O 2, and 6.85 mg/ml for HOCl. When neutrophils were washed after pre-incubation with BSA, there was no significant decrease of ROS after stimulation of PMA (maximal: 15±1.2%). In the free cell experiments, IC 50 for H 2O 2 and HOCl were 7.86 mg/ml and 0.67 mg/ml, respectively. The mechanism at which BSA acts may result from a simple chemical interaction with ROS rather than an intracellular mechanism by intervention in PMA oxidative metabolism. These antioxidant activities confer to BSA properties, which might be used to prevent damage inflicted by these ROS during inflammatory disorders.