Voltage-dependent calcium block of normal and tetramethrin-modified single sodium channels
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منابع مشابه
Voltage-dependent block of normal and mutant muscle sodium channels by 4-Chloro-m-Cresol.
1 The effects of 4-Chloro-m-Cresol (4-CmC) were examined on heterologously expressed wild type (WT), Paramyotonia Congenita (R1448H) and Hyperkalemic Periodic Paralysis (M1360V) mutant alpha-subunits of human muscle sodium channels. 2 Block of rested sodium channels caused by 4-CmC was concentration-dependent with an ECR50 of 0.40 mM in WT, 0.45 mM in R1448H and 0.49 mM in M1360V. 3 Inactivatio...
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Hydrogen and some divalent cations block Na channels in a voltage-dependent manner (Woodhull 1973; Ulbricht and Wagner 1975; Mozhayeva et al. 1981, 1982a; Begenisich and Danko 1983). The potential-dependence of this blockage suggests that the binding site for blocking ions is situated in the pore at some fractional distance (<5) from the outside (Woodhull 1973). Alkaloid aconitine has been show...
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Voltage-activated calcium channels can be divided into two subgroups based on their activation threshold, low-voltage-activated (LVA) and high-voltage-activated (HVA). Auxiliary subunits of the HVA calcium channels contribute significantly to biophysical properties of the channels. We have cloned and characterized members of two families of auxiliary subunits: alpha2delta and gamma. Two new alp...
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In this study, involvement ofvoltage-dependent calcium channels in LTP of responses of rat visual cortex slices was analyzed. Field potentials including EPSP1 and EPSP2 from layers II/III were recorded through stimulation of layer IV. Whereas nifedipine, a L-type calcium channel blocker (L-VDCC), did not considerably affect the LTP of responses, but Ni2+, a relatively selective blocker of T-typ...
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In this study, involvement ofvoltage-dependent calcium channels in LTP of responses of rat visual cortex slices was analyzed. Field potentials including EPSP1 and EPSP2 from layers II/III were recorded through stimulation of layer IV. Whereas nifedipine, a L-type calcium channel blocker (L-VDCC), did not considerably affect the LTP of responses, but Ni2+, a relatively selective blocker of T-typ...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 1984
ISSN: 0006-3495
DOI: 10.1016/s0006-3495(84)84159-4