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Artículo
Identification and Functional Characterization of a K1 Channel a- Subunit with Regulatory Properties Specific to Brain
(1997)
The physiological diversity of K1 channels mainly depends on the expression of several genes encoding different a-subunits. We have cloned a new K1 channel a-subunit (Kv2.3r) that is unable to form functional channels on ...
Artículo
Artículo
Hypoxia induces voltage-dependent Ca2+ entry and quantal dopamine secretion in carotid body glomus cells
(1994)
We have investigated the changes of cytosolic [Ca2+1 and the secretory -activity in single glomus cells dispersed from rabbit carotid bodies during exposure to solutions with variable 02 tension (Po2). In normoxic conditions ...
Artículo
Oxygen sensing by ion channels and chemotransduction in single glomus cells
(1996)
We have monitored cytosolic [Ca2+] and dopamine release in intact fura-2-loaded glomus cells with microfluoroimetry and a polarized carbon fiber electrode. Exposure to low PO2 produced a rise of cytosolic [Ca2+] with two ...
Artículo
Gating of O2-sensitive K + Channels of Arterial Chemoreceptor Cells and Kinetic Modifications Induced by Low PO2
(1992)
We have studied the kinetic properties of the O2-sensitive K+ channels (KO2 channels) of dissociated glomus cells from rabbit carotid bodies exposed to variable O2 tension (PO2). Experiments were done using single-channel ...
Artículo
Thyrotropin-releasing-hormone (TRH) and its physiological metabolite TRH-OH inhibit Na+ channel activity in mammalian septal neurons
(1990)
The interaction of thyrotropin-releasing hormone (TRH) and its physiological metabolite TRH-OH with Na+ channels was studied in enzymatically dissociated guinea pig septal neurons by using the whole-cell variant of the ...
Artículo
Single K+ channels in membrane patches of arterial chemoreceptor cells are modulated by 02 tension
(1991)
Type I cells of the carotid body are known to participate in the detection of 02 tension in arterial blood but the primary chemotransduction mechanisms are not well understood. Here we report the existence in excised ...
Artículo
A Small Domain in the N Terminus of the Regulatory a-Subunit Kv2.3 Modulates Kv2.1 Potassium Channel Gating
(1999)
Recent work has demonstrated the existence of regulatory K1 channel a-subunits that are electrically silent but capable of forming heterotetramers with other pore-forming subunits to modify their function. We have investigated ...
Artículo
Potassium Channel Types in Arterial Chemoreceptor Cells and Their Selective Modulation by Oxygen
(1992)
Single K+ channel currents were recorded in excised membrane patches from dispersed chemoreceptor cells of the rabbit carotid body under conditions that abolish current flow through Na+ and Ca2+ channels. We have found ...
Artículo
Oxygen-sensitive calcium channels in vascular smooth muscle and their possible role in hypoxic arterial relaxation
(1995)
We have investigated the modifications of cytosolic [Ca2+] and the activity of Ca2+ channels in freshly dispersed arterial myocytes to test whether lowering 02 tension (P02) directly influences Ca2+ homeostasis in these ...