IR-Met and IR-Leu-enkephalin content in the perioesophageal ganglia of Helix aspersa seasonal variations |
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| Affiliation: | 1. Departments of Biology, University of Utah, Salt Lake City, UT, United States;2. Anesthesiology, University of Utah, Salt Lake City, UT, United States;3. Huntsman Cancer Institute, University of Utah, Salt Lake City, UT, United States;1. Department of Psychology, University of Western Ontario, London, Canada;2. Graduate Program in Neuroscience University of Western Ontario, London, Canada;3. Department of Psychology and Neuroscience Program, University of Guelph, Guelph, Canada;1. Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. School of Marine Sciences, Ningbo University, Ningbo 315211, China |
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| Abstract: | 1. In order to determine the presence of opioid peptides and their possible variation throughout the year in the different ganglia of the perioesophageal ring of the terrestrial snail Helix aspersa, radioimmunoassays with highly specific antisera risen for Met-enkephalin (ME) and Leu-enkephalin (LE) were carried out monthly.2. Clear monthly variations in both IR-enkephalins' concentrations were found, following a seasonal trend. IR-LE concentrations were higher than IR-ME throughout the year in all the regions, however, no clear regional differences were found for each.3. IR-LE/IR-ME ratios presented denned seasonal peaks for each region. |
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