Effects of ketamine on proliferation and apoptosis of pheochromocytoma cell / 法医学杂志

OBJECTIVE@#To explore the effect of ketamine on adrenal pheochromocytoma (PC12) cell proliferation inhibition and induction of apoptosis and its mechanism.@*METHODS@#PC12 cells of rats were models for dopaminergic neuron. PC12 cells were cultured with ketamine at concentrations of 0.9, 1.2, 1.5, 1.8 and 2.1 mmol/L, respectively. The cell viability was measured by MTT method after incubation at 12, 24, 48 and 72h. Hoechst stain was used to observe the morphological changes of apoptosis. PC12 cells cultured after 48 h with different concentrations of ketamine were selected to detect apoptotic rate using flow cytometry and detect the expression of bax and bcl-2 proteins using Western blotting.@*RESULTS@#For different concentrations of ketamine, vitality of PC12 cells significantly decreased with increase of the incubation time. Apoptosis was obviously observed using Hoechst staining. Flow cytometry showed that apoptosis rates significantly increased with increasing ketamine concentrations.@*CONCLUSION@#Ketamine can inhibit the proliferation of PC12 cell by inducing apoptosis of the PC12 cell in a concentrations-dependent manner. The underlying mechanism may be related to promoting the expression of bax and inhibiting the expression of bcl-2 in the cells.

Behavior study of ketamine-induced symptoms similar to schizophrenia in mice / 法医学杂志

OBJECTIVE@#To observe the symptoms similar to schizophrenia in mice after ketamine single or continuous injection and to evaluate the feasibility of schizophrenia model injected with different dose of ketamine.@*METHODS@#A total of 40 male mice were randomly divided into 4 groups, which were injected intraperitoneally with physiological saline (control group), 25 mg/kg ketamine (low dose group), 50 mg/kg ketamine (middle dose group), and 100 mg/kg ketamine (high dose group) qd for 7 days continuously. The behavior changes of mice were observed.@*RESULTS@#Hyperactivity, stereotyped behavior and ataxia (P < 0.01) were observed in high dose group after single injection. After continuous injection of ketamine for 7 days, the middle dose group showed hyperactivity, stereotyped behavior and ataxia (P < 0.05), stereotyped behavior and ataxia were more significant in high dose group (P < 0.01).@*CONCLUSION@#Ketamine can induce the symptoms similar to schizophrenia in mice after single or continuous injection. The symptoms induced by high dose ketamine will be more prominent and stable after continuous injection.