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Laboratory of Molecular Physiology; National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health; Bethesda, Maryland
Submitted 29 October 2007; accepted in final form 25 January 2008
The effect of N-arachidonoyl L-serine (ARA-S), a recently discovered lipoamino acid found in the CNS, on N-type Ca2+ channels of rat sympathetic ganglion neurons was determined using whole cell patch clamp. Application of ARA-S produced a rapid and reversible augmentation of Ca2+ current that was voltage dependent and resulted from a hyperpolarizing shift in the activation curve. ARA-S did not influence G protein modulation of Ca2+ channels and appeared to act independently of G-protein-coupled receptors. These findings provide a foundation for investigating possible roles for ARA-S in nervous system function.
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