Abstract
Protein tyrosine phosphorylation (PY) is a well-known signalling mechanism which is also involved in host–parasite interactions. Despite its transcendence, PY has been poorly studied in parasitic helminths. The aim of this study is to examine the effect of bile salts on the PY pattern in parasitic trematodes. Two distinct adult models were analysed: Echinostoma friedi, of intestinal habitat, and Fasciola hepatica, naturally inhabitant of host biliary channels. Our results show that bile salts induce specific and distinct protein PY in both trematode species, indicating that this signalling process seems to be also involved in host–trematode relationships. Index Descriptors and Abbreviations: PY, tyrosine phosphorylation; Fasciola hepatica and Echinostoma friedi (Trematoda); Protein extracts; Western-immunoblotting
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