title: Toxic effects of phencyclidine on developing chick embryo brain.
abstract: We studied the effects of Phencyclidine (PCP, Angel Dust) on the developing chick embryo brain. In Group-1, the eggs were injected with PCP on the 7th day of incubation and the embryo brains were studied on the 10th day. In Group-2, eggs were injected twice; first on the 7th day and then on the 10th day of incubation. Group-2 brains were then studied on the 16th day of incubation. PCP significantly depressed the development of embryo brains. Cerebral hemisphere weight, total protein and total DNA were significantly lower on day 10 of incubation in Group-1. Similar results were observed in Group-2. Concomitantly, the concentration of brain serotonin at day 10 was also significantly reduced when PCP was injected into the eggs on the 7th day of incubation. Since serotonin has been reported to influence development of the chick embryo brain, the present finding of the effect of PCP on brain development might be a secondary phenomenon. The possible implications of the effects of PCP on human brain development are also discussed.
mesh_terms: D000818:Animals; D001921:Brain / Q000196:embryology*; D002642:Chick Embryo; D010622:Phencyclidine / Q000633:toxicity*; D012701:Serotonin / Q000378:metabolism
chemical_list: D012701:Serotonin; D010622:Phencyclidine