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AN ANALYSIS OF SYNAPTIC TRANSMISSION MECHANISM FROM TASTE RECEPTOR CELL TO GUSTATORY NERVE

Research Project

Project/Area Number 12671810
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Functional basic dentistry
Research InstitutionNAGASAKI UNIVERSITY GRADUATE SCHOOL OF BIOMEDICAL SCIENCES

Principal Investigator

MIYAMOTO Takenori  INTEGRATIVE SENSORY PHYSIOLOGY, RESEARCH ASSOCIATE, 大学院・医歯薬学総合研究科, 助手 (10167679)

Co-Investigator(Kenkyū-buntansha) MIYAZAKI Toshihiro  ORALCYTOLOGY AND CELL BIOLOGY, RESEARCH ASSOCIATE, 大学院・医歯薬学総合研究科, 助手 (10174161)
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 2002: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2001: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2000: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsTaste cell / Taste stmuli / transmitter / carbonfiber electrode / patch clamp / bioassay / paracrine / vallate papilla / von Ebner's gland complex / アミノ酸 / アセチルコリン / ペプチド / 有廓乳頭味細胞 / エブネル腺 / 電気化学的検出法 / セロトニン / グルタミン酸 / マウス / 味神経 / 塩味 / うま味
Research Abstract

Immunohistochemical studies have demonstrated that taste receptor cells containing serotonin exist in taste buds. In the previous studies, we detected serotonin secreted from the serosal side of the lingual epithelium in response to the repeated application of NaCl or citric acid to the mucosal side of the lingual epithelium using full-automatical perfusion/sampling device for epithelial tissue and HPLC. Therefore, we attempted to detect serotonin secreted from a single taste bud in response to the application of taste stimuli to the taste pore using localized stimulation procedure and carbon fiber electrodes. However, we were unable to detect any monoamines. We attempted to immunohistochemically detect localization of several subtypes of glutamatergic receptor molecules in the taste buds of the fungiform papilla. One of the metabotropic glutamatergic receptors, mGluR4 was detected in the taste bud cells, but not in the gustatory nerve terminal of the afferent synapse. Taken together w … More ith electrophysiological data, mGluR4 in the taste bud cells possibly play an inhibitory role for transduction mechanism of umami. These results suggest mat substances other than glutamate and monoamines mediate the transmission from taste receptor cells to gustatory nerves. Therefore, we performed a bioassay using vallate papilla (VP)/von Ebner's gland (VEG) complex, where several receptor molecules are expressed on the acinar cells. The results indicated that localized bitter stimuli to the cleft of isolated vallate papilla suppressed voltage-gated K^+ currents of acinar cells, whereas sour stimuli induced inward current responses in acinar cells with slow time course, suggesting that these actions of taste stimuli are due to paracrine effect of transmitters released from taste bud cells. These findings also suggest that transmitter released by bitter stimulus is different from that by sour stimulus, and receptor molecules for these multiple transmitters were expressed on acinar cells of VEG. Less

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (26 results)

All Other

All Publications (26 results)

  • [Publications] Miyamoto, et al.: "Differential transduction mechanisms underlying NaCl-and Kcl-induced responses in mouse taste cells"Chemical senses. vol.26. 67-77 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 宮本武典他: "マウス非単離味細胞のMSG応答とGMPによる増強"日本味と匂学会誌. 8巻3号. 307-310 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Imendra, et al.: "Serotonin differentially modulates the electrical properties of different subsets of taste receptor cells in bullfrog"European Journal of Neuroscience. Vol.16. 629-640 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Miyazaki, et al.: "Comparative study of the proliferative activity of serous-and mucous-type acinar cells in-developing mongolian gerbil mixed salivary glands"Acta Histochemica et Cytochemica. Vol.35. 305-312 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 宮本武典: "味覚情報の受容と伝達のメカニズム-味覚障害治療の基礎として-"日本歯科東洋医学会誌. 21巻1/2号. 1-23 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 宮本武典他: "スナネズミのエブネル腺細胞の膜特性と味物質による修飾"歯科基礎医学雑誌. 44巻5号. 482-482 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Imendra et al: "Serotonin inhibits voltage-gated sodium current by cyclic adenosine monophosphate-dependent mechanism in bullfrog taste receptor cells"Neuroscience Letters. vol.294. 151-154 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Miyamoto et al.: "Differential transduction mechanisms underlying NaCl- and KCl-induced responses in mouse taste cells"Chemical Senses. vol.26. 67-77 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Miyamoto et al.: "MSG-induced response and its enhancement by GMP in mouse non-dissociated taste cells"Japanese Journal of Taste and Smell Research. vol.8. 307-310 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Imendra et al.: "Serotonin differentially modulates the electrical properties of different subsets of taste receptor cells in bullfrog"European Journal of Neuroscience. vol.16. 629-640 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Miyazaki et al.: "Comparative study of the proliferative activity of serous- and mucous-type acinar cells in developing mongolian gerbil mixed salivary glands"Acta Histochemica et Cytochemica. vol.35. 305-312 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Miyamoto: "Mechanism for reception and transmission of gustatory information"Journal of Japan Dental society of Oriental Medicine. vol.21. 1-23 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Miyamoto et al.: "Modulation of membrane properties of acinar cells in gerbil von Ebner's gland by tastants"Japanese Journal of Oral Biology. vol.44. 482 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Imendra et al.: "Serotonin differentially modulates the electrical properties of different subsets of taste receptor cells in bullfrog"European Journal of Neuroscience. Vol.16. 629-640 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Miyazaki et al.: "Comparative study of the proliferative activity of serous-and mucous-type acinar cells in developing mongolian gerbil mixed salivary glands"Acta Histochemica et Cytochemica. Vol.35. 305-312 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Imendra 他: "Effect of acetic acid on intracellular Ca^<2+> concentration in bullfrog taste disc cells"日本味と匂学会誌. 9巻3号. 531-534 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 宮本武典: "味覚情報の需要と伝達のメカニズム-味覚障害治療の基礎として-"日本歯学東洋医学会誌. 2巻1/2号. 1-23 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 宮本武典他: "スナネズミのエブネル腺細胞の膜特性と味物質による修飾"歯科基礎医学雑誌. 44巻5号. 482 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Miyamoto et al.: "Differential transduction mechanisms underlying NaCI-and Kcl-induced responses in mouse taste cells."Chemical senses. Vol.26. 67-77 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Fukasawa et al.: "Reconstituted ion channels of frog fungiform papilla cell membrane."Zoological Science. Vol.18. 299-307 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Okada et al.: "Saccharin activates cation conductance via inositol 1,4,5-trisphsphate production in isolated frog taste cells."European Journal of Neuroscience. Vol.13. 308-314 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 宮本 武典他: "マウス非単離味細胞のMSG応答とGMPによる増強"日本味と匂学会誌. 8巻3号. 307-310 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 宮本 武典他: "味覚情報の受容と伝達のメカニズム-味覚障害治療の基礎として-"日本歯科東洋医学会誌. (印刷中). (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Sato,T. et al: "The origin of slow potential on the tongue surface induced by frog glossopharyngeal efferent fiber stimulation."Chemical Senses. 25巻. 583-589 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Imendra,K.G. et al.: "Serotonin inhibits voltage-gated soduim channnel by CAMP-dependent mechanism in bullfrog taste receptor cells."Neuroscience Letters. 294巻. 151-154 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Imendra,K.G. et al.: "Differential effects of serotonin on voltage-gated potassium current (Ik) in different cubsets of bullfrog taste receptor cells."日本味と匂学会誌. 7巻. 511-512 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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