Biomaterial Database

Galanin-(1-15), but not galanin-(1-29), modulates 5-HT1A receptors in the dorsal hippocampus of the rat brain: possible existence of galanin receptor subtypes. 1994

P B Hedlund, and U B Finnman, and N Yanaihara, and K Fuxe

Department of Neuroscience, Karolinska Institute, Stockholm, Sweden.

The aim of the present study was to evaluate whether galanin-(1-29) and galanin-(1-15) can modulate the 5-hydroxytryptamine1A (5-HT1A) receptors using [3H]8-OH-2-(di-n-propylamino)-tetralin ([3H]8-OH-DPAT) as a radioligand. Membrane preparations of the dorsal hippocampus, an area having the recently described [125I]galanin-(1-15) fragment binding sites, but having very few porcine [125I]galanin-(1-29) binding sites, were used. Galanin-(1-15) produced a concentration-dependent increase in the Kd value of [3H]8-OH-DPAT with a maximum effect of approximately 65% at 3 nM of galanin-(1-15), whereas galanin-(1-29) had no effect. This increase of the Kd value of [3H]8-OH-DPAT could be completely counteracted by the putative galanin antagonist M35 (1 nM). The Bmax values of [3H]8-OH-DPAT were not affected in any experiment. In conclusion, the present results give further evidence for the existence of a galanin receptor subtype mainly recognizing N-terminal galanin fragments, also having the ability to reduce the affinity of 5-HT1A receptors.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D010446	Peptide Fragments	Partial proteins formed by partial hydrolysis of complete proteins or generated through PROTEIN ENGINEERING techniques.	Peptide Fragment,Fragment, Peptide,Fragments, Peptide
D010455	Peptides	Members of the class of compounds composed of AMINO ACIDS joined together by peptide bonds between adjacent amino acids into linear, branched or cyclical structures. OLIGOPEPTIDES are composed of approximately 2-12 amino acids. Polypeptides are composed of approximately 13 or more amino acids. PROTEINS are considered to be larger versions of peptides that can form into complex structures such as ENZYMES and RECEPTORS.	Peptide,Polypeptide,Polypeptides
D011869	Radioligand Assay	Quantitative determination of receptor (binding) proteins in body fluids or tissue using radioactively labeled binding reagents (e.g., antibodies, intracellular receptors, plasma binders).	Protein-Binding Radioassay,Radioreceptor Assay,Assay, Radioligand,Assay, Radioreceptor,Assays, Radioligand,Assays, Radioreceptor,Protein Binding Radioassay,Protein-Binding Radioassays,Radioassay, Protein-Binding,Radioassays, Protein-Binding,Radioligand Assays,Radioreceptor Assays
D011964	Receptors, Gastrointestinal Hormone	Cell surface proteins that bind gastrointestinal hormones with high affinity and trigger intracellular changes influencing the behavior of cells. Most gastrointestinal hormones also act as neurotransmitters so these receptors are also present in the central and peripheral nervous systems.	Gastrointestinal Hormone Receptors,Intestinal Hormone Receptors,Receptors, Gastrointestinal Peptides,Gastrointestinal Hormone Receptor,Intestinal Hormone Receptor,Receptors, Gastrointestinal Hormones,Receptors, Intestinal Hormone,Gastrointestinal Hormones Receptors,Gastrointestinal Peptides Receptors,Hormone Receptor, Gastrointestinal,Hormone Receptor, Intestinal,Hormone Receptors, Gastrointestinal,Hormone Receptors, Intestinal,Hormones Receptors, Gastrointestinal,Peptides Receptors, Gastrointestinal,Receptor, Gastrointestinal Hormone,Receptor, Intestinal Hormone
D011985	Receptors, Serotonin	Cell-surface proteins that bind SEROTONIN and trigger intracellular changes which influence the behavior of cells. Several types of serotonin receptors have been recognized which differ in their pharmacology, molecular biology, and mode of action.	5-HT Receptor,5-HT Receptors,5-Hydroxytryptamine Receptor,5-Hydroxytryptamine Receptors,Receptors, Tryptamine,Serotonin Receptor,Serotonin Receptors,Tryptamine Receptor,Tryptamine Receptors,Receptors, 5-HT,Receptors, 5-Hydroxytryptamine,5 HT Receptor,5 HT Receptors,5 Hydroxytryptamine Receptor,5 Hydroxytryptamine Receptors,Receptor, 5-HT,Receptor, 5-Hydroxytryptamine,Receptor, Serotonin,Receptor, Tryptamine,Receptors, 5 HT,Receptors, 5 Hydroxytryptamine
D006624	Hippocampus	A curved elevation of GRAY MATTER extending the entire length of the floor of the TEMPORAL HORN of the LATERAL VENTRICLE (see also TEMPORAL LOBE). The hippocampus proper, subiculum, and DENTATE GYRUS constitute the hippocampal formation. Sometimes authors include the ENTORHINAL CORTEX in the hippocampal formation.	Ammon Horn,Cornu Ammonis,Hippocampal Formation,Subiculum,Ammon's Horn,Hippocampus Proper,Ammons Horn,Formation, Hippocampal,Formations, Hippocampal,Hippocampal Formations,Hippocampus Propers,Horn, Ammon,Horn, Ammon's,Proper, Hippocampus,Propers, Hippocampus,Subiculums
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D017207	Rats, Sprague-Dawley	A strain of albino rat used widely for experimental purposes because of its calmness and ease of handling. It was developed by the Sprague-Dawley Animal Company.	Holtzman Rat,Rats, Holtzman,Sprague-Dawley Rat,Rats, Sprague Dawley,Holtzman Rats,Rat, Holtzman,Rat, Sprague-Dawley,Sprague Dawley Rat,Sprague Dawley Rats,Sprague-Dawley Rats
D044088	Receptors, Galanin	A family of G-protein-coupled receptors that are specific for GALANIN and galanin peptides. They are generally considered to be coupled to the GI, INHIBITORY G-PROTEIN to meditate the neurological effects of galanin. Several subtypes of galanin receptors occur with differing specificities for the full length galanin, galanin peptide fragments, and galanin-like peptide.	Galanin Receptor,Galanin Receptors,Receptor, Galanin