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Immunoreactivity to the pancreatic polypeptide family in the nervous system of the adult human blood fluke, Schistosoma mansoni

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Summary

The presence and distribution of neuropeptides belonging to the pancreatic polypeptide family have been demonstrated by an indirect immunofluorescence technique in the nervous systems of adult male and female Schistosoma mansoni. Seven antisera of differing regional specificity to pancreatic polypeptide (PP), peptide YY (PYY) and neuropeptide Y (NPY) were employed on both whole-mount and cryostat-sectioned material. Positive immunoreactivity (IR) was obtained with all antisera except an N-terminally-directed antiserum to NPY. In the CNS, immunoreactivity was restricted to cell bodies and nerve fibres in the anterior ganglia, central commissure and dorsal and ventral nerve cords of both sexes, whereas, in the PNS, positive-IR was present in the plexuses innervating the subtegumental musculature and the oral and ventral suckers. Intense immunoreactivity was observed in a plexus of nerve fibres and cell bodies in the lining of the gynaecophoric canal and in fine nerve fibres innervating the dorsal tubercles of the male. In contrast, in the female, strong immunoreactivity was evident in nerve plexuses innervating the lining of the ovovitelline duct and in the wall of the ootype, but most notably in a cluster of cells in the region of Mehlis' gland. Results suggest that molecules with C-terminal homology to the PP-family are present in S. mansoni. These peptides would appear to be important regulatory molecules in the parasite's nervous system and may play a role in the control of egg production.

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Authors and Affiliations

  1. Department of Medicine, The Queen's University of Belfast, BT7 1NN, Belfast, Northern Ireland, UK

    P. J. Skuce, C. F. Johnston, C. Shaw & K. D. Buchanan

  2. School of Biology and Biochemistry, The Queen's University of Belfast, Belfast, Northern Ireland, UK

    I. Fairweather & D. W. Halton

Authors
  1. P. J. Skuce
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  2. C. F. Johnston
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  3. I. Fairweather
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  4. D. W. Halton
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  5. C. Shaw
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  6. K. D. Buchanan
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Skuce, P.J., Johnston, C.F., Fairweather, I. et al. Immunoreactivity to the pancreatic polypeptide family in the nervous system of the adult human blood fluke, Schistosoma mansoni . Cell Tissue Res 261, 573–581 (1990). https://doi.org/10.1007/BF00313537

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  • DOI: https://doi.org/10.1007/BF00313537

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