Document Detail

Effective amino acid composition of seaweeds inducing food preference behaviors in Aplysia kurodai.
MedLine Citation:
PMID:  19447292     Owner:  NLM     Status:  MEDLINE    
Aplysia kurodai feeds on Ulva but rejects Gelidium and Pachydictyon with distinct patterned jaw movements. We previously demonstrated that these movements are induced by taste alone. Thus some chemicals may contribute to induction of these responses. We explored the amino acids composition of Ulva, Gelidium and Pachydictyon extracts used during our taste-induced physiological experiments. These solutions contained many constituents. The concentrations of six amino acids (Asp, Asn, Glu, Gln, Phe, Tau) were obviously different in the three extract solutions. We explored patterned jaw movements following application of solutions containing a pure amino acid. We statistically compared the occurrence numbers of ingestion-like and rejection-like patterned jaw movements (positive and negative values, respectively) for each amino acid. Our results suggested that L-Asn tends to induce ingestion-like responses, likely resulting in a preference of Ulva. In contrast, L-Asp tends to induce rejection-like responses, likely resulting in aversion towards Pachydictyon. In addition, we demonstrated that L-Asn and L-Asp solutions were sufficient to induce muscle activity associated with ingestion-like or rejection-like responses in the jaw muscles of a semi-intact preparation.
Tatsumi Nagahama; Kiyo Fujimoto; Shigemi Takami; Aiko Kinugawa; Kenji Narusuye
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-03-21
Journal Detail:
Title:  Neuroscience research     Volume:  64     ISSN:  1872-8111     ISO Abbreviation:  Neurosci. Res.     Publication Date:  2009 Jul 
Date Detail:
Created Date:  2009-05-18     Completed Date:  2009-08-20     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8500749     Medline TA:  Neurosci Res     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  243-50     Citation Subset:  IM    
Department of Biophysics, Faculty of Pharmaceutical Science and Open Research Center, Toho University, Funabashi, Japan.
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MeSH Terms
Algae, Brown / chemistry,  metabolism
Algae, Red / chemistry,  metabolism
Amino Acids / chemistry,  metabolism*
Aplysia / physiology*
Asparagine / chemistry,  metabolism
Aspartic Acid / chemistry,  metabolism
Eating / psychology
Food Preferences*
Glutamic Acid / chemistry,  metabolism
Glutamine / chemistry,  metabolism
Jaw / physiology
Phenylalanine / chemistry,  metabolism
Taurine / chemistry,  metabolism
Ulva / chemistry*,  metabolism
Reg. No./Substance:
0/Amino Acids; 107-35-7/Taurine; 56-84-8/Aspartic Acid; 56-85-9/Glutamine; 56-86-0/Glutamic Acid; 63-91-2/Phenylalanine; 7006-34-0/Asparagine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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