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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Elementary properties and pharmacological sensitivities of calcium channels in mammalian peripheral neurons.

The major component of whole-cell Ca2+ current in differentiated, neuron-like rat pheochromocytoma (PC12) cells and sympathetic neurons is carried by dihydropyridine-insensitive, high-threshold-activated N-type Ca2+ channels. We show that these channels have unitary properties distinct from those of previously described Ca2+ channels and contribute both slowly inactivating and large sustained components of whole-cell current. The N-type Ca2+ currents are modulated by GTP binding proteins. The snail toxin omega-conotoxin reveals two pharmacological components of N-type currents, one blocked irreversibly and one inhibited reversibly. Contrary to previous reports, neuronal L-type channels are insensitive to omega-conotoxin. N-type Ca2+ channels appear to be specific for neuronal cells, since their functional expression is greatly enhanced by nerve growth factor.[1]

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