Abstract:
:1. Effects of inositol-1,4,5-trisphosphate (InsP3) applied through a patch pipette to Xenopus laevis olfactory receptor cells (ORCs) were studied using the patch-clamp technique in conjunction with calcium imaging with fura-2. 2. InsP3 activated, first, a novel voltage-independent Ca2+ current (ICa) and, second, a nonselective cation current (Icat). 3. The activation of these currents occurred at different intracellular calcium concentrations, and the activation of either current led to a marked increase of [Ca2+]i in the dendritic knob. 4. The results suggest that InsP3 might act as a second messenger in vertebrate olfactory receptor cells by activating, through different mechanisms, a plasma membrane Ca2+ conductance (ICa) and a nonselective cation conductance (Icat).
journal_name
J Neurophysioljournal_title
Journal of neurophysiologyauthors
Schild D,Lischka FW,Restrepo Ddoi
10.1152/jn.1995.73.2.862subject
Has Abstractpub_date
1995-02-01 00:00:00pages
862-6issue
2eissn
0022-3077issn
1522-1598journal_volume
73pub_type
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