Abstract:
:The localisation and distribution of the cholinergic, serotoninergic and peptidergic components of the nervous system of the frog-lung fluke Haplometra cylindracea have been determined by the application of standard enzyme cytochemical and immunocytochemical techniques to cryostat sections and whole-mount preparations. Cholinesterase activity (ChE), as indicative of acetylcholine, has been demonstrated cytochemically in the CNS and PNS; however, the anterior ganglia were notably unreactive. The occurrence of serotonin was examined by an indirect immunofluorescence technique, and immunoreactivity (IR) was demonstrable in small, paired anterior ganglia and in fine nerve fibres associated with the somatic muscle, cirrus and gonopore. The peptidergic portion of the nervous system was investigated using antisera to 17 mammalian regulatory peptides and the invertebrate peptide FMRFamide, and was visualised by both indirect immunofluorescence and confocal scanning laser microscopy. Positive immunostaining occurred with antisera raised against pancreatic polypeptide (PP), peptide tyrosine tyrosine (PYY), substance P (SP), peptide histidine isoleucine (PHI) and FMRFamide. Immunoreactivity to PP, PYY and FMRFamide was widespread throughout the nervous system and was evident in large, paired anterior ganglia, the dorsal commissure, main nerve tracts and the extensive array of small fibres that constitute the PNS. In contrast, the distribution of nerves immunoreactive to SP and PHI was less apparent, with PHI-IR occurring exclusively within the fibrous neuropile of the ganglia and in fibres of the ventral nerve cord. Results are discussed with respect to the distribution of the various neurochemical elements and their roles as putative neurotransmitters and/or regulatory molecules.
journal_name
Parasitol Resjournal_title
Parasitology researchauthors
McKay DM,Halton DW,Johnston CF,Fairweather I,Shaw Cdoi
10.1007/BF00931056subject
Has Abstractpub_date
1990-01-01 00:00:00pages
509-17issue
6eissn
0932-0113issn
1432-1955journal_volume
76pub_type
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journal_title:Parasitology research
pub_type: 杂志文章
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journal_title:Parasitology research
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更新日期:2014-06-01 00:00:00
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journal_title:Parasitology research
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