Effects of met-enkephalin on electrical coupling between identified neurons in the pulmonate snails,Helix and Lymnaea |
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| Affiliation: | 1. Department of Microbiology, School of Arts and Science, PRIST University, Tamil Nadu 613-403, India;2. Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;3. Bioprocess Engineering Division, Smykon Biotech, Kanniyakumari 629 001, Tamil Nadu, India;4. Grassland and Forage Division, Rural Development Administration, National Institute of Animal Science, Cheonan 31000, Republic of Korea;5. Department of Botany and Biotechnology, AJ College of Science and Technology, Thonnakal, Trivandrum, India |
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| Abstract: | 1. The effects of met-enkephalin on electrical coupling between molluscan neurons have been investigated using the isolated brains of Helix pomatia and Lymnaea stagnalis.2. In the presence of both serotonin and met-enkephalin, non-rectifying electrical coupling is strongly facilitated between identified respiratory neurons in Helix, whilst coupling between putative, serotonin-containing, ciliomotoneurons in Lymnaea is facilitated by met-enkephalin alone.3. Facilitation of coupling by met-enkephalin is weaker in the strongly coupled neurons, VDl/RPaD2 of Lymnaea.4. These data suggest that met-enkephalin can modulate different groups of electrically coupled cells and may be involved in coordination of motor patterns. |
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