Proliferation of pronephric lymphocytes of carp, Cyprinus carpio induced by extracts of Bothriocephalus acheilognathi.
The interaction between Bothriocephalus acheilognathi Yamaguti, 1934 (Cestoda) and pronephric lymphocytes of carp, Cyprinus carpio L. was studied by examining proliferation of lymphocytes isolated from both naïve fish and fish injected intraperitoneally with cestode extract. Lymphocytes from naïve hosts were stimulated to proliferate in the presence of the extract depending upon the extract protein concentrations; lower concentrations (0.01-0.05 microgram/ml) induced the greatest response, and immunosuppression occurred at higher concentrations. Significant differences were noted in fish that received intraperitoneal injections of parasite extracts. Five days post-injection, lymphocyte proliferation was significantly greater in these individuals compared with sham injected or untreated controls. This difference was reduced at 10 days post-injection, although the response was dependent on the concentration of the parasite extract. The possible significance of the observed stimulation/suppression of lymphocyte activity to establishment of the parasite in the wild is discussed.
Nie
P
P
Department of Biological Sciences, University of Keele, Staffordshire, UK.
Hoole
D
D
Arme
C
C
D000704:Analysis of Variance; D000818:Animals; D002347:Carps / Q000276:immunology / Q000469:parasitology*; D002469:Cell Separation; D002478:Cells, Cultured; D002589:Cestoda / Q000276:immunology*; D007668:Kidney / Q000166:cytology; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000276:immunology*; D014020:Tissue Extracts / Q000276:immunology
D014020:Tissue Extracts