ANALYSING THE POSSIBLE IN VITRO ANTIOXIDANT ACTION OF CHODROITIN SULFATE FROM THE GILL OF Prochilodus brevis
DOI:
https://doi.org/10.18817/repesca.v15i1.3619Abstract
Prochilodus brevis is a Brazilian rheophilic fish of local market, but its bioactive glycosaminoglycans (PbGAGs) composition is known. Current study analyzed PbGAGs from gill on yield, physical-chemical features and in vitro antioxidant effects. Tritured gill was incubated with papain, in 100 mM sodium acetate buffer (pH 5)+cysteine/EDTA, both 5 mM, to obtain PbGAGs. After filtration, PbGAGs precipitated with cetylpiridinium chloride and washed with alcohol were checked by agarose/polyacrylamide gels electrophoreses using known markers and then stained in toluidine blue or Stains-All. Infrared characterized the PbGAGs. Possible antioxidant actions were in vitro evaluated by DPPH, total antioxidant capacity (TAC) and ferrous ion chelanging (FIC) assays using BHT, ascorbic acid and EDTA as references. Extraction yielded 1.54±0.02% and biochemical analyses indicated chondroitin-4/6-sulfate similar to mammalian derived of sulfation pattern and size of ~ 40 kDa. PbGAGs had no effect on DPPH assay, but exerced antioxidation greater in FIC than TAC ones, alghough significantly less actives than sysnthetic agents. Therefore, gill from P. brevis is a freshwater source containing antioxidant chondroitin sulfate.