Effects of Chlorella vulgaris on Immuno-Related Factors and their Expression in Penaeus vannamei

The aim of this 42-day study was to examine the effects of Chlorella vulgaris on immuno-related factors and their expression in Penaeus vannamei. Results showed that C. vulgaris significantly enhanced the activities of phenolic oxidase (PO), superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) in the serum and hepatopancreas of P. vannamei (p<0.05, p<0.01), increased the expression levels of PO, SOD, GSH-Px, CAT, and IMD genes in the serum of P. vannamei (p<0.05, p<0.01), and significantly increased the expression level of Toll receptor genes in the hepatopancreas of P. vannamei (p<0.05, p<0.01) and the expression level of IMD gene. In conclusion, C. vulgaris regulated the immune function of P. vannamei through the Toll receptor gene and the IMD pathways. We speculated the Chorella polysaccharides were the main active ingredients of C. vulgaris