MK-212 ; Prolactin response ; Fluoxetine ; Body temperature ; Obsessive-compulsive disorder
Abstract
Objects : This study was performed to evaluate the effect of MK-212(6-chloro-2-[1-piperaziny1]-pyrazine), a serotonin agonist, on body temperature and plasma prolactin levels in patients with obsessive-compulsive disorder(OCD) receiving fluoxetine, a selective serotonin reuptake inhibitor.
Methods : Body temperature and prolactin responses to the MK-212 and placebo were examined in patients with OCD. A single dose of 20㎎ of MK-212 or placebo were given orally under single-blind, random-assignment conditions to ten subjects before and after 8 weeks fluoxetine treatment.
Results : Fluoxetine treatment group showed a significant potentiation in prolactin and body temperature response to MK-212 as compared to an unmedicated state in patients with OCD.
Conclusions : These results support the previous hypothesis that OCD may involve the subsensitivity of the 5-HT receptor itself and/or decreased functional activity of the postreceptor signal transduction.