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Humoral serotonin and dopamine modulate the feeding in the snail, Helix pomatia

Hernádi, L. and Kárpáti, L. and Győri, J. and Vehovszky, Ágnes and Hiripi, L. (2008) Humoral serotonin and dopamine modulate the feeding in the snail, Helix pomatia. Acta Biologica Hungarica, 59 (Supple). pp. 39-46. ISSN 0236-5383

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Abstract

We investigated the effect of elevated levels of humoral 5HT and DA on the feeding latency of Helix pomatia, 1 day, 3 days and 10 days following satiation, by injecting monoamines into the haemocoel. HPLC assay of monoamines showed that both 5HT and DA are present in pmol/ml concentrations in the haemolymph of both starved and non-starved animals. Elevated levels of 5HT and DA were most effec- tive at decreasing the feeding latency 10 days following satiation when DA decreased the feeding laten- cy in a concentration dependent manner between 10 –7 and 10 –5 M whereas 5HT levels decreased the feed- ing latency only at 10 –6 M but increased it at 10 –5 M. Immunocytochemistry revealed that both 5HT3 and D1 receptor-like immuno-reactivity are present in cell bodies located in the same areas of the buccal gan- glia. Our observations suggest that both humoral DA and 5HT mutually modulate the activity of the feed- ing CPG through neurons which have these receptors.

Item Type: Article
Subjects: Q Science / természettudomány > QH Natural history / természetrajz
Depositing User: Endre Sarvay
Date Deposited: 20 Nov 2017 16:16
Last Modified: 20 Nov 2017 16:16
URI: http://real.mtak.hu/id/eprint/70218

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