Abstract:
:Infection of the snail Lymnaea stagnalis with the schistosome parasite Trichobilharzia ocellata results in inhibition of reproduction and in giant growth. Parasite-related effects on the neuroendocrine centres that control these processes were studied electrophysiologically. Haemolymph from infected snails reduced the excitability of the caudodorsal cells, which control egg laying. In contrast, the excitability of the growth-controlling Light Green Cells was increased under these conditions. The endogenous anti-gonadotropic neuropeptide schistosomin, the presence of which is strongly enhanced in parasitized snails, induced similar effects. Schistosomin apparently plays an important role in the balance between reproduction and growth in Lymnaea. This balance is severely disturbed during parasitic infection, probably as a result of the release of the peptide.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Hordijk PL,de Jong-Brink M,ter Maat A,Pieneman AW,Lodder JC,Kits KSdoi
10.1016/0304-3940(92)90047-bkeywords:
subject
Has Abstractpub_date
1992-03-02 00:00:00pages
193-7issue
2eissn
0304-3940issn
1872-7972pii
0304-3940(92)90047-Bjournal_volume
136pub_type
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