RESUMEN
Little is known about whether tamoxifen (TAM) can affect resting state microglia apoptosis and about the cellular mechanism that may account for this.To explore this question,we incubated the microglia cell line BV-2 cells with TAM at different concentrations.Cell viability was assessed by the MTT assay,and flow cytometric analysis was performed to detect the cell apoptosis rate.Furthermore,mitochondrial membrane potential (△ψm) was tested by flow cytometry,and Bax,Bcl-2,Fas,and Fas-L expression was detected by Western blot.The results demonstrated that TAM decreased cell viability and induced apoptosis of BV-2 cells in a concentration- and time-dependent manner.In addition,disruption of Δψm was followed by up-regulated expression of pro-apoptotic Bax,Fas and Fas-L,and down-regulated expression of anti-apoptotic Bcl-2.These results indicate that TAM may induce apoptosis of BV-2 cells through both mitochondria- and death receptor-mediated pathways.
RESUMEN
In this study, we explored the operation options for middle cranial fossa arachnoid cysts(MCFAC). One hundred and forty-nine patients who were operated for a symptomatic MCFAC between 1993 and 2006 in our hosptial were analyzed. Follow-up time ranged from 1 y to 14 y(mean=5.4 y). All these patients were divided into three subgroups according to Galassi classification.Long-term outcome and complications were studied respectively. Fenestration (F) resulted in a more favorable long-term outcome and less complication for cysts of types Ⅰ and Ⅱ, whereas a favorable outcome was noted in type Ⅲ patients who underwent cysto-peritoneal shunting (S). We are led to conclude that Fenestration is suitable for cysts of types Ⅰ and Ⅱ (Galassi classification),cysto-peritoneal shunting is better for cysts of type Ⅲ.