[Mechanism of vitamin B6 regulation of acetylcholine-induced currents in mollusk neurons: pre- and postsynaptic effects].

Vitamin B6 has been studied for the mechanism of its effect on acetylcholine-induced sodium-potassium and chloride currents in E16 neuron of isolated brain of the snail Helix pomatia. The results indicate that the effect of vitamin B6 on acetylcholine-induced currents in postsynaptic neuron E16 is mediated via changes in gamma-aminobutyric acid (GABA) release from a presynaptic neuron and subsequent GABA-induced and cAMP-dependent processes in E16 neuron. It is suggested that effects of vitamin and antivitamin B6 on axons of a presynaptic neuron or neurons may be connected with regulation of GABA synthesis from glutamate catalyzed by the pyridoxal-phosphate-containing enzyme.