Neuron
LHRH and GTP-γ-S modify calcium current activation in bullfrog sympathetic neurons
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2017, Biochemical and Biophysical Research CommunicationsCitation Excerpt :To isolate the voltage dependence of the agmatine-induced ICav2.2 inhibition, we measured ICav2.2 using a double pulse protocol, consisting of two identical pulses from −80 to 0 mV for 20 ms, separated by a 10-ms conditioning depolarizing pulse (Fig. 2A and C, upper traces). Consistent with previous reports [17,31], NA inhibited ICav2.2 in voltage-dependent manner that displayed kinetic slowing and prepulse facilitation, which represents relief of current inhibition by conditioning depolarizing pulses (Fig. 2A and B). In contrast, agmatine-induced ICav2.2 inhibition did not show any kinetic slowing compared to the control current (Fig. 2C).
Gβ<inf>2</inf> mimics activation kinetic slowing of Ca<inf>V</inf>2.2 channels by noradrenaline in rat sympathetic neurons
2014, Biochemical and Biophysical Research CommunicationsCitation Excerpt :Neurotransmitters and hormones such as noradrenaline (NA), vasoactive intestinal polypeptide, somatostatin and gonadotropine releasing hormone have diverse modulating effects. One common means by which they affect cell function is via voltage-dependent inhibition of CaV2.2 channels [5–9]. Since CaV2.2 channels often transduce electrical to chemical signaling in excitable cells, their regulation can modulate intercellular communication.
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