Protein kinases and neuronal excitability
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چکیده
Like most cells, neurons are regulated by intracellular second messengers formed in response to extracellular signals. Among the components of a neuron that are subject to regulation are its complement of ion channels, which determine the neuron's intrinsic electrical properties. Modulation of these electrical properties influences both the responsiveness of neurons and their capacity to signal to other cells. Also subject to regulation by second messengers are neurotransmitter receptors, proteins that determine the amount of neurotransmitter release, components of the neuronal cytoskeleton, and elements that control gene expression in neurons, including ion channel genes. Regulation by second messengers constitutes a fundamental mechanism that allows neurons to control long-lasting changes in behavior and to change patterns of behaviors in response to sensory input. This is perhaps most apparent in cases where deficits in the brain levels of neurotransmitters, such as dopamine or serotonin, which elicit second messenger production in neurons, result in profound psychopathology, including schizophrenia, anxiety, and depression.
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تاریخ انتشار 2004