BIOPHYSICS
Online ISSN : 1349-2942
ISSN-L : 1349-2942
Regular Article
Effects of serotonin on the heartbeat of pond snails in a hunger state
Miki YamagishiTakayuki WatanabeDai HatakeyamaEtsuro Ito
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2015 Volume 11 Pages 1-5

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Abstract

Serotonin (5-hydroxytryptamine: 5-HT) is a multimodal transmitter that controls both feeding response and heartbeat in snails. However, the effects of 5-HT on the hunger state are still unknown. We therefore examined the relation among the hunger state, the heartbeat rate and the 5-HT action in food-starved snails. We found that the hunger state was significantly distinguished by the heartbeat rate in snails. The heartbeat rate was high in the food-satiated snails, whereas it was low in the food-starved snails. An increase in 5-HT concentration in the body boosted the heartbeat rate in the food-starved snails, but did not affect the rate in the food-satiated snails. These results suggest that 5-HT application may mimic the change from a starvation to a satiation state normally achieved by direct ingestion of food.

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© 2015 THE BIOPHYSICAL SOCIETY OF JAPAN
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