Plasma and bile antibodies of the teleost Trematomus bernacchii specific for the nematode Pseudoterranova decipiens

[摘要] ABSTRACT: We investigated the occurrence of antibodies against protein antigens of the nematode parasite Pseudoterranova decipiens in the plasma and bile of the Antarctic teleost Trematomus bernacchii. Three different P. decipiensprotein solutions were prepared: excreted/secreted proteins from live larvae (ESP); surface associated proteins obtained by mild extraction of larval bodies (SAP); and cuticular soluble proteins recovered by extraction in strong reducing conditions(CSP). Using different immunoassays, these 3 preparations were tested for their ability to bind fish antibody. As determined by ELISA, the specific antibody binding activity was higher in SAP than in CSP. As determined by dot blot immunoassay, thespecific antigen binding activity versus SAP was higher in bile than in plasma antibodies. A different number of antigenic components of SAP and ESP were identified by immunoblotting performed with plasma or bile antibodies. These results led to theconclusion that T. bernacchii parasitism by nematodes involves plasma and bile anti-parasite antibodies. Furthermore bile antibodies were found to be more reactive and more heterogeneous than plasma.

[学科分类] 生物科学（综合）

[关键词] Fish antibody;Nematode antigen;Pseudoterranova decipiens;Trematomus bernacchii;Anti parasite antibody;Antarctic fish;Bile antibody