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Title
  • Effect of gap junction blocker beta-glycyrrhetinic acid on taste disk cells in frog.
Creator

Sato, Toshihide

Nishishita, Kazuhisa

Okada, Yukio

Toda, Kazuo

Rights
    • © 2009 Springer Science+Business Media, LLC.
    • The original publication is available at www.springerlink.com
Subject
  • Other Depolarizing response profile
  • Other Frog taste disk cell
  • Other Gap junction blocker
  • Other Gap junction hemichannel
  • Other Membrane resistance increase
Description
Other
  • A gap junction blocker, 18beta-glycyrrhetinic acid (beta-GA), increased the membrane resistance of Ia, Ib and II/III cells of frog taste disk by 50, 160, and 300 M Omega, respectively, by blocking the gap junction channels and hemichannels. The amplitudes of gustatory depolarizing potentials in the disk cells for 4 basic taste stimuli were reduced to 40-60% after intravenous injection of beta-GA at 1.0 mg/kg. beta-GA of 1.0 mg/kg did not affect the resting potentials and the reversal potentials for tastant-induced depolarizing potentials in any taste disk cells. The percentage of cells responding to each of 4 basic taste stimuli and varying numbers of 4 taste qualities did not differ between control and beta-GA-treated taste disk cells. This implies that gustatory depolarizing response profiles for 4 basic taste stimuli were very similar in control and beta-GA-treated taste disk cells. It is concluded that beta-GA at 1.0 mg/kg reduced the amplitude of gustatory depolarizing potentials in taste disk cells by strongly blocking depolarizing currents flowing through the gap junction channels and hemichannels, but probably weakly affected the gustatory transduction mechanisms for 4 taste stimuli.
Other
  • identifier:Cellular and molecular neurobiology, 29(4), pp.503-512; 2009
Other
  • identifier:1573-6830
PublisherSpringer Netherlands
Date Issued 2009-06
Languageeng
NIItypejournal article
VersiontypeAM
Identifier URI http://hdl.handle.net/10069/22211
Relation
  • isIdenticalTo PMID 19145483
  • isIdenticalTo DOI https://doi.org/10.1007/s10571-008-9342-6
Journal
    • ISSN 0272-4340
    • Cellular and molecular neurobiology
    29(4), 503-512
File
Oaidate2012-01-26T06:48:00Z