Abstract
The responses of peripheral blood leucocytes (PBLs) from the rock bream Oplegnathus fasciatus stimulated with lipopolysaccharides (LPS), concanavalin A/phorbol myristate acetate (Con A/PMA), and/or polyriboinosinic polyribocytidylic acid (poly I:C) were investigated using a cDNA microarray consisting of 2,400 clones. A total of 336 unique genes were more than twofold up-regulated: 169 in LPS-stimulated PBLs, 209 in Con A/PMA-stimulated PBLs, and 146 in poly I:C-stimulated PBLs. Moreover, other genes were similarly up-regulated with combinations of stimulants: 85 genes in PBLs stimulated with both LPS and Con A/PMA, 79 in PBLs stimulated with both LPS and poly I:C, and 66 in PBLs stimulated with both Con A/PMA and poly I:C. Furthermore, 42 other genes were more than twofold up-regulated in PBLs stimulated with all tested mitogens. Other genes were not significantly induced. Overall, these results suggest that certain genes in rock bream play important roles in physiological and pathological processes. Furthermore, the microarray analysis showed promise as a tool for investigating immune mechanisms in teleost fish.
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