Protective effects of fucoidan against hydrogen peroxide-induced oxidative damage in porcine intestinal epithelial cells

Abstract

This study was conducted to evaluate the effectiveness of fucoidan in ameliorating hydrogen peroxide (H2 O2)-induced oxidative stress to porcine intestinal epithelial cell line (IPEC-1). The cell viability test was initially performed to screen out appropriate concentrations of H2 O2 and fucoidan. After that, cells were exposed to H2 O2 in the presence or absence of pre-incubation with fucoidan. Hydrogen peroxide increased the apoptotic and necrotic rate, boosted reactive oxygen species (ROS) generation, and disturbed the transcriptional expression of genes associated with antioxidant defense and apoptosis in IPEC-1 cells. Pre-incubation with fucoidan inhibited the increases in necrosis and ROS accumulation induced by H2 O2. Consistently, in the H2 O2-treated IPEC-1 cells, fucoidan normalized the content of reduced glutathione as well as the mRNA abundance of NAD(P)H quinone dehydrogenase 1 and superoxide dismutase 1 while it prevented the overproduction of malondialdehyde. Moreover, H2 O2 stimulated the translocation of nuclear factor-erythroid 2-related factor-2 to the nucleus of IPEC-1 cells, but this increase was further promoted by fucoidan pre-treatment. The results suggest that fucoidan is effective in protecting IPEC-1 cells against oxidative damage induced by H2 O2, which may help in developing appropriate strategies for maintaining the intestinal health of young piglets.