Investigation of the effects of some pesticides on carbonic anhydrase isoenzymes

Abstract

The aim of this study was to investigate the inhibitory effects of some pesticides known to have harmful effects on human health on carbonic anhydrase isoenzymes. Therefore, carbonic anhydrase isoenzymes (hCA I and II) were purified from human erythrocytes. The isoenzymes were purified from human erythrocytes by using an affinity column that has the chemical structure of Sepharose-4B-4-(6-amino-hexyloxy)-benzenesulfonamide. The purity of the isoenzymes was checked by sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDSPAGE). It was determined that the pesticides used in this study inhibit hCA I and hCA II isoenzymes at different levels in vitro. It was determined that the strongest inhibitor for the hCA I enzyme was Carbofuran (IC50:6.52 mu M; K-i: 3.58 mu M) and the weakest one was 1-Naphtol (IC50:16.55 mu M; K-i: 14.4 mu M) among these pesticides. It was also found that the strongest inhibitor for the hCA II enzyme was coumatetralil (IC50:5.06 mu M; K-i: 1.62 mu M) and the weakest one was Dimethachlor (IC50 14.6 mu M; K-i: 8.44 mu M).