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Passive membrane electrical property and neuro-muscular transmission in human detrusor smooth muscle

Research Project

Project/Area Number 12671543
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Urology
Research InstitutionKyushu University

Principal Investigator

SEKI Narihito  Department of Urology, Assistant professor, 医学部附属病院, 講師 (90294941)

Co-Investigator(Kenkyū-buntansha) TERAMOTO Noriyoshi  Department of Pharmacology, Assistant professor, 大学院・医学研究院, 講師 (40294912)
ITO Yushi  Department of Pharmacology, Professor, 大学院・医学研究院, 教授 (80037506)
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 2002: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2001: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2000: ¥1,100,000 (Direct Cost: ¥1,100,000)
Keywordshuman detrusor / ATP / Purinergic receptor / Potassium channel / neuro-muscular transmission / Acetylcholine / Patch clamp / スルフォニルウレア受容体 / ヒト膀胱排尿筋 / 細胞内微小電極法 / 脱分極
Research Abstract

Patch-clamp experiments were performed using dispersed human detrusor myosites. In conventional whole-cell configuration (symmetrical 140 mM K^+ conditions, 500 μM ATP in pipette solution), application of 100 μM pinacidil caused an inward K^+ current that was suppressed by 5 μM glibenclamide at a holding potential of -60 mV. In cell-attached configuration, K_<ATP> channels (approximately 4.8 pA, 80 pS) were activated by 100 μM pinacidil and were reveresibly suppressed by 1 μM glibenclamide at -60 mV. The activity of K_<ATP> channels was readily observed just after the establishment of inside-out configuration, and channel activity was suppressed by internal application of 100 μM ATP. These electrophysiological properties are similar to those of native and recombinant K_<ATP> channels which are composed of Kir6.2. These results suggest that the pore region protein of human detrusor K_<ATP> channels is likely to be Kir6.2.

Report

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

    (28 results)

All Other

All Publications (28 results)

  • [Publications] Noriyoshi Teramoto: "The effects of caffeine on ATP-sensitive K^+ channels in smooth muscle cells from pig urethra"British Journal of Pharmacology. 131(3). 505-513 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Noriyoshi Teramoto: "Possible underestimation of the channel conductance underlying pinacidil-induced K^+ currents using noise analysis in pig urethral myocytes"Journal of Pharmacy and Pharmacology. 52. 1395-1403 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Noriyoshi Teramoto: "Dual action of ZD6169, a novel K^+ channel opener, on ATP-sensitive K^+ channels in pig urethral myocytes"British Journal of Pharmacology. 133(1). 154-164 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Takakazu Yunoki: "The effects of flecainide on ATP-sensitive K^+ channels in pig urethral myocytes"British Journal of Pharmacology. 133(5). 730-738 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Noriyoshi Teramoto: "The involvement of L-type Ca^<2+> channels in the relaxant effects of the ATP-sensitive K^+ channel opener ZD6169 on pig urethral smooth muscle"British Journal of Pharmacology. 134(7). 1505-1515 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Narihito Seki: "Intravesical instillation of resiniferatoxin for neurogenic bladder dysfunction in a patient with myelodysplasia"Jouranl of Urology. 166. 2368-2369 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Noriyoshi Teramoto: "Modification of ATP-sensitive K(+) channels by proteolysis in smooth muscle cells from pig urethra"Life Science. 72(4-5). 475-485 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Alison F. Brading: "Morphological and physiological characteristics of urethral circular and longitudinal smooth muscle"Scandinavian Journal of Urology and Nephrology. 207. 12-18 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Noriyoshi Teramoto: "The effects of caffeine on ATP-sensitive K^+ channels in smooth muscle cells from pig urethra"Br J Pharmacol. 131 (3). 505-513 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Noriyoshi Teramoto: "Possible underestimation of the channel conductance underlying pinacidil-induced K^+ currents using noise analysis in pig urethral myocytes"J Pharmacy Pharmacol. 52. 1395-1403 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Noriyoshi Teramoto: "Dual action of ZD6169, a novel K^+ channel opener, on ATP-sensitive K^+ channels in pig urethral myocytes"Br J Pharmacol. 133 (1). 154-164 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Takakazu Yunoki: "The effects of flecainide on ATP-sensitive K^+ channels in pig urethral myocytes"Br J Pharmacol. 133 (5). 730-738 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Narihito Seki: "Intravesical instillation of resiniferatoxin for neurogenic bladder dysfunction in a patient with myelodysplasia"J Urol. 166. 2368-2369 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Noriyoshi Teramoto: "Modification of ATP-sensitive K(+) channels by proteolysis in smooth muscle cells from pig urethra"Life Sci. 72 (4-5). 475-485 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Alison F. Brading: "Morphological and physiological characteristics of urethral circular and longitudinal smooth muscle"Scand J Urol Nephrol. 207. 12-18 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Noriyoshi Teramoto: "The involvement of L-type Ca channels in the relaxant effects of the ATP-sensitive K channel opener ZD6169 on pig urethral smooth muscle"British Journal of Pharmacology. 134 (7). 1505-1515 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Noriyoshi Teramoto: "The effects of caffeine on ATP-sensitive K^+ channels in smooth muscle cells from pig urethra"British Journal of Pharmacology. 131(3). 505-513 (2000)

    • Related Report
      2002 Annual Research Report
  • [Publications] Noriyoshi Teramoto: "Possible underestimation of the channel conductance underlying pinacidil-induced K^+ currents using noise analysis in pig urethral myocytes"Journal of Pharmacy and Pharmacology. 52. 1395-1403 (2000)

    • Related Report
      2002 Annual Research Report
  • [Publications] 関成人: "閉塞に伴う膀胱の形態と生理、薬理学的変化"Urological Review. 3(2). 7-10 (2000)

    • Related Report
      2002 Annual Research Report
  • [Publications] Noriyoshi Teramoto: "Dual action of ZD6169, a novel K^+ channel opener, on ATP-sensitive K^+ channels in pig urethral myocytes"British Journal of Pharmacology. 133(1). 154-164 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] Takakazu Yunoki: "The effects of flecainide on ATP-sensitive K^+ channels in pig urethral myocytes"British Journal of Pharmacology. 133(5). 730-738 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] Noriyoshi Teramoto: "The involvement of L-type Ca^<2+> channels in the relaxant effects of the ATP-sensitive K^+ channel opener ZD6169 on pig urethral smooth muscle"British Journal of Pharmacology. 134(7). 1505-1515 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] Narihito Seki: "Intravesical instillation of resiniferatoxin for neurogenic bladder dysfunction in a patient with myelodysplasia"Jouranl of Urology. 166. 2368-2369 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] Noriyoshi Teramoto: "Modification of ATP-sensitive K(+) channels by proteolysis in smooth muscle cells from pig urethra"Life Science. 72(4-5). 475-485 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Alison F. Brading: "Morphological and physiological characteristics of urethral circular and longitudinal smooth muscle"Scandinavian Journal of Urology and Nephrology. 207. 12-18 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 甲斐信幸: "膀胱平滑筋収縮機構"脳21. 5(3). 256-261 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 甲斐信幸: "頻尿・尿失禁の薬物療法 切迫性尿失禁"薬局. 53(8). 2175-2182 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 関成人: "神経泌尿器科学研究法:電気生理学:微小電極法"日本医学館. 9 (2000)

    • Related Report
      2002 Annual Research Report

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

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