To clarify the possible role played by calcineurin in kindling development,
we examined the effects of pretreatment with FK506, a selective calcineuri
n inhibitor, on pentylenetetrazole (PTZ) kindling in rats. FK506 facilitate
d the speed of kindling induced by repeated administration of 30-mg/kg PTZ,
while FK506 did not ameliorate acute seizure manifestations after a single
injection of PTZ. Our results suggested that calcineurin might exert an in
hibitory effect on PTZ kindling. (C) 2001 Elsevier Science B.V. All rights
reserved.