title: Amyloid beta-protein activates tachykinin receptors and inositol trisphosphate accumulation by synergy with glutamate.
abstract: The biological function of the soluble form of the amyloid beta-protein (ABP) was examined by assaying its interaction with neuronal receptors expressed in Xenopus oocytes. ABP weakly activated tachykinin receptors, but in the presence of N-methyl-D-aspartate and alpha-amino-3-hydroxy-5-methylisoxazole-4- propionate-type glutamate receptors ABP-induced responses were greatly enhanced. Glutamate and ABP together also induced accumulation of inositol trisphosphate and increases in intracellular Ca2+. These observations suggest that in the presence of glutamate, ABP can activate tachykinin receptors and phosphatidylinositol turnover. ABP may therefore act as a neuromodulatory peptide.
authors.affiliation: Salk Institute, San Diego, CA 92186-5800.
authors.forename: H
authors.initials: H
authors.lastname: Kimura
authors.forename: D
authors.initials: D
authors.lastname: Schubert
mesh_terms: D015763:2-Amino-5-phosphonovalerate / Q000494:pharmacology; D018750:6-Cyano-7-nitroquinoxaline-2,3-dione; D000595:Amino Acid Sequence; D016229:Amyloid beta-Peptides / Q000494:pharmacology*; D000700:Analgesics / Q000494:pharmacology; D000818:Animals; D002118:Calcium / Q000494:pharmacology; D004357:Drug Synergism; D005260:Female; D005971:Glutamates / Q000494:pharmacology*; D018698:Glutamic Acid; D015544:Inositol 1,4,5-Trisphosphate / Q000378:metabolism*; D007700:Kinetics; D008969:Molecular Sequence Data; D009474:Neurons / Q000502:physiology; D009865:Oocytes / Q000378:metabolism*; D011810:Quinoxalines / Q000494:pharmacology; D012333:RNA, Messenger / Q000378:metabolism; D018091:Receptors, AMPA; D017470:Receptors, Glutamate / Q000096:biosynthesis / Q000187:drug effects / Q000378:metabolism*; D016194:Receptors, N-Methyl-D-Aspartate / Q000096:biosynthesis / Q000187:drug effects / Q000378:metabolism*; D018040:Receptors, Neurokinin-1; D017981:Receptors, Neurotransmitter / Q000096:biosynthesis / Q000187:drug effects / Q000378:metabolism*; D012964:Sodium / Q000494:pharmacology; D013373:Substance P / Q000031:analogs & derivatives / Q000494:pharmacology; D014981:Xenopus
chemical_list: D016229:Amyloid beta-Peptides; D000700:Analgesics; D005971:Glutamates; D011810:Quinoxalines; D012333:RNA, Messenger; D018091:Receptors, AMPA; D017470:Receptors, Glutamate; D016194:Receptors, N-Methyl-D-Aspartate; D018040:Receptors, Neurokinin-1; D017981:Receptors, Neurotransmitter; D013373:Substance P; D018698:Glutamic Acid; D018750:6-Cyano-7-nitroquinoxaline-2,3-dione; D015763:2-Amino-5-phosphonovalerate; D015544:Inositol 1,4,5-Trisphosphate; C042867:spantide; D012964:Sodium; D002118:Calcium