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Localization of the A1.12/9 antigen family to the neurones, putative sensory receptors and tegument of Schistosoma mansoni
Author(s) -
HAVERCROFT J. C.,
SMITH A. L.
Publication year - 1993
Publication title -
parasite immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 75
eISSN - 1365-3024
pISSN - 0141-9838
DOI - 10.1111/j.1365-3024.1993.tb00621.x
Subject(s) - viral tegument , biology , schistosoma mansoni , antigen , receptor , immunology , microbiology and biotechnology , schistosoma japonicum , neuropeptide , trematoda , virology , genetics , helminths , schistosomiasis
Summary The A1.12/9 antigen family were localized to the periphery of vesicle‐like structures in neurones and in the putative sensory receptors of cercariae by immuno‐electron microscopy. After transformation into schistosomula, the antigens were rapidly lost until, after 18 h, no immunoreactivity could be detected. Expression resumed at approximately 36 h post‐transformation and had returned to high levels by 4 days post‐infection. This level was maintained through to the adult worm stage. In 4 day lung schistosomula and in 14 day and 21 day liver schistosomula immunolabelling was observed within the matrix of the tegument itself and also in association with the tegumental membrane and vesicles within the tegument. These properties suggest that the A1.12/9 antigens may be involved in neuropeptide processing pathways. In particular, this family may represent the schistosome homologue of the granin family with which they share common properties and some sequence homology.