NDLI: Voltage-gated Ca$^{2+}$ channels in type III taste cells

Content Provider	Springer Nature Link
Author	Romav, R. A. Yatzenko, Y. E. Kabava, N. V. Bystrova, M. F. Kolesnikov, S. S.
Copyright Year	2009
Abstract	In the mammalian taste bud, the heterogeneous cell population includes three morphologically distinct types of cells, type I to type III, which are also different in their electrophysiological features. Particularly, voltage-gated (VG) Ca$^{2+}$ channels are functional solely in taste cells of the type III. These channels were studied here with external Ba$^{2+}$ ions as current carriers. It was specifically shown that VG Ba$^{2+}$ currents were almost completely blockable with nifedipine as well as with ionic blockers, such as Cd$^{2+}$, Ni$^{2+}$, and Co$^{2+}$. Kinetic properties of VG Ba$^{2+}$ currents in type III cells and their sensitivity to the blockers indicated that these currents were largely mediated by VG Ca$^{2+}$ channels of the L-type. The expression of genes, which encode pore-forming α1-subunits of Ca$^{2+}$ channels, was analyzed using methods of molecular biology. Among four genes encoding L-type Ca$^{2+}$ channel α1-subunits (Ca $_{ ν }$ 1.1-Ca $_{ ν }$ 1.4), the expression of Ca $_{ ν }$ 1.2 was demonstrated in taste cells.
Starting Page	254
Ending Page	260
Page Count	7
File Format	PDF
ISSN	19907478
Journal	Biochemistry (Moscow) Supplement Series A: Membrane and Cell Biology
Volume Number	3
Issue Number	3
e-ISSN	19907494
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2009-09-03
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	taste cell voltage-gated Ca$^{2+}$ channel dihydropyridine Cell Biology
Content Type	Text
Resource Type	Article
Subject	Cell Biology Biochemistry Biophysics

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