2006 Fiscal Year Final Research Report Summary
Strategic evaluation of Receptor interaction using resonance energy transfer
| Project/Area Number |
17590058
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Biological pharmacy
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| Research Institution | Kyoto University |
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Principal Investigator |
KOSHIMIZU Takaaki Kyoto Uni. Dep. Pharmaceutical Sci, Lecturer, 薬学研究科, 講師 (20392491)
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| Project Period (FY) |
2005 – 2006
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| Keywords | Receptor Interaction / Drug discovery / Pharmacology |
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| Research Abstract |
Heteromultimerization of G-protein coupled receptors makes new class of drug targets. We evaluated systemic strategy to delineate functional properties of heteromer receptor, from their molecular level to whole animal level. Combinations of drug-oriented pharmacological method and genetic manipulation of receptor expression levels were equally effective for this purpose.
To elucidate temporal and spacial receptor-receptor interactions in living cells, N-or C-terminus of the subunits were connected with either luciferase or green fluorescent proteins and transfer of bioluminescent resonance energy from luciferase to fluorescent proteins was monitored.
Using gene targeting, physical and functional interactions of α 1-adrenergic receptor subtypes and V1 vasopressin subtypes were investigated. Elucidation of the physiological and pathophysiological roles of the specific α 1-adrenergic receptor subtype has been hampered, because the α 1-adrenergic receptor subtypes are co-expressed in the same arterial smooth muscles with different ratios, and that sufficiently subtype-selective agonists and antagonists have not been available. In addition, recent biochemical and pharmacological studies confirmed the potential role of dimerization of distinct α 1-adrenergic receptor subtypes in controlling their expression and pharmacological properties. Our data showed that α 1B-and α 1D-adrenergic receptors play distinctive contributions to the resting and agonist-stimulated BP regulations, particularly to the progression of hypertensive state. The V1a receptor, on the other hand, plays an important role in normal resting arterial BP regulation mainly by its regulation of circulating blood volume and baroreflex sensitivity.
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Research Products
(10 results)
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[Journal Article] V1a vasopressin receptors maintain normal blood pressure by regulating circulating blood volume and baroreflex sensitivity.2006
Author(s)
Koshimizu, T, Nasa, Y, Tanoue, A, Oikawa, R, Kawahara, Y, Kiyono, Y, Adachi, T, Tanaka, T, Kuwaki, T, Mori, T, Takeo, S, Okamura, H, Tsujimoto, G.
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Journal Title
Proc Natl Acad Sci USA 103(20)
Pages: 7807-12
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Carboxyl-terminal splicing enhances physical interactions between the cytoplasmic tails of purinergic P2X receptors.2006
Author(s)
Koshimizu, T, Kretschmannova, K, He, ML, Ueno, S, Tanoue, A, Yanagihara, N, Stojilkovic, SS, Tsujimoto, G.
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Journal Title
Mol Pharmacol 69(5)
Pages: 1588-98
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Free fatty acids administered into the colon promote the secretion of glucagon-like peptide-1 and insulin.2006
Author(s)
Adachi, T, Tanaka, T, Takemoto, K, Koshimizu, T, Hirasawa, A, Tsujimoto, G.
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Journal Title
Biochem Biophys Res Commun 340(1)
Pages: 332-7
Description
「研究成果報告書概要(欧文)」より
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