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Biochemical studies of K+ efflux from rat pinealocytes revealed for the first time that norepinephrine (NE) increases 86Rb+ and 42K+ efflux. The effects of NE depend upon concurrent activation of both alpha 1- and beta-adrenoceptors. This effect is mediated by cAMP and Ca2+, which appear to act in conjunction to control K+ efflux; studies with charybdotoxin(More)
The Joseph Rowntree Foundation has supported this project as part of its programme of research and innovative development projects, which it hopes will be of value to policy makers, practitioners and service users. The facts presented and views expressed in this report are, however, those of the author and not necessarily those of the Foundation. All rights(More)
To characterize the effect of beta-endorphin on T-lymphocyte activation, we examined its influence on membrane currents, intracellular calcium flux, and c-myc mRNA levels during mitogenic stimulation of Jurkat cells. While beta-endorphin weakly enhanced voltage-activated K+ currents of Jurkat cells by itself, it suppressed these currents in the presence of(More)
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