The neuropeptide schistosomin and haemolymph from parasitized snails induce similar changes in excitability in neuroendocrine cells controlling reproduction and growth in a freshwater snail.

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 Lett

journal_title

Neuroscience letters

authors

Hordijk PL,de Jong-Brink M,ter Maat A,Pieneman AW,Lodder JC,Kits KS

doi

10.1016/0304-3940(92)90047-b

keywords:

subject

Has Abstract

pub_date

1992-03-02 00:00:00

pages

193-7

issue

2

eissn

0304-3940

issn

1872-7972

pii

0304-3940(92)90047-B

journal_volume

136

pub_type

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