Taste receptor : a new therapeutic target for obesity and diabetes
Project/Area Number |
20689034
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Research Category |
Grant-in-Aid for Young Scientists (A)
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Allocation Type | Single-year Grants |
Research Field |
Functional basic dentistry
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Research Institution | Kyushu University |
Principal Investigator |
SHIGEMURA Noriatsu Kyushu University, 歯学研究院, 准教授 (40336079)
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Project Period (FY) |
2008 – 2010
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Project Status |
Completed (Fiscal Year 2010)
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Budget Amount *help |
¥22,880,000 (Direct Cost: ¥17,600,000、Indirect Cost: ¥5,280,000)
Fiscal Year 2010: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2009: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Fiscal Year 2008: ¥11,700,000 (Direct Cost: ¥9,000,000、Indirect Cost: ¥2,700,000)
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Keywords | 味覚 / うま味 / 遺伝子多型性 / 受容体 / 臓器 / ヒト / 肥満 |
Research Abstract |
Umami taste is elicited by L-glutamate, and is thought to be one of five basic taste qualities that plays a key role in intake of amino acids. A heterodimer of a G protein coupled receptor, T1R1 and T1R3, is proposed to function as its receptor. However, little is known about single nucleotide polymorphisms (SNP) in the genes and its potential links with individual differences in umami sensitivity. Here we investigated the association between recognition thresholds for umami substances and genetic variations in human T1R1 and T1R3, and the functions of T1R1/T1R3 variants using a heterologous expression system. Our study demonstrated that the T1R1-372Thr creates a more sensitive umami receptor than -372Ala, while T1R3-757Cys creates a less sensitive one than -757Arg for umami substances, and showed a strong correlation between the recognition thresholds and in vitro dose-response relationships. These results in human studies support the propositions that a T1R1/T1R3 heterodimer acts as an umami receptor, and that genetic variation in this heterodimer directly affects umami taste sensitivity.
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Report
(4 results)
Research Products
(65 results)
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[Journal Article] Endocannabinoids selectively enhance sweet taste.2010
Author(s)
Yoshida R, Ohkuri T, Jyotaki M, Yasuo T, Horio N, Yasumatsu K, Sanematsu K, Shigemura N, Yamamoto T, Margolskee RF, Ninomiya Y.
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Journal Title
Proc Natl Acad Sci USA. 107(2)
Pages: 935-939
Related Report
Peer Reviewed
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[Journal Article] Discrimination of taste qualities among mouse fungiform taste bud cells.2009
Author(s)
Yoshida R, Miyauchi A, Yasuo T, Jyotaki M, Murata Y, Yasumatsu K, Shigemura N, Yanagawa Y, Obata K, Ueno H, Margolskee RF, Ninomiya Y.
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Journal Title
J Physiol. 587(Pt18)
Pages: 4425-4439
Related Report
Peer Reviewed
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[Journal Article] Endocannabinoids selectively enhance sweet taste.2009
Author(s)
Yoshida R, Ohkuri T, Jyotaki M, Yasuo T, Horio N, Yasumatsu K, Sanematsu K, Shigemura N, Yamamoto T, Margolskee RF, Ninomiya Y.
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Journal Title
Proc Natl Acad Sci USA. 107(2)
Pages: 935-9
Related Report
Peer Reviewed
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[Journal Article] Discrimination of taste qualities among mouse fungiform taste bud cells.2009
Author(s)
Yoshida R, Miyauchi A, Yasuo T, Jyotaki M, Murata Y, Yasumatsu K, Shigemura N, Yanagawa Y, Obata K, Ueno H, Margolskee RF, Ninomiya Y.
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Journal Title
J physiol. 587
Pages: 4425-39
Related Report
Peer Reviewed
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[Journal Article] Gurmarin sensitivity of sweet taste responses is associated with co-expression patterns of T1r2, T1r3, and gustducin2008
Author(s)
Shigemura N, Nakao K, Yasuo T, Murata Y, Yasumatsu K, Nakashima A, KatsukawaH, SakoN, Ninomiya Y.
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Journal Title
Biochem Biophys Res Commun. 367
Pages: 356-63
Related Report
Peer Reviewed
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[Presentation] 味覚と肥満2009
Author(s)
重村憲徳
Organizer
日本咀嚼学会第20回記念学術大会
Place of Presentation
福岡
Year and Date
2009-10-03
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