To observe the effects of phenylallyl compounds on prostaglandin E2(PGE2)release in mouse cerebral microvascular endothelial cells (bEnd.3) stimulated by IL-1β, and to analyze their structure-activity relationshi...To observe the effects of phenylallyl compounds on prostaglandin E2(PGE2)release in mouse cerebral microvascular endothelial cells (bEnd.3) stimulated by IL-1β, and to analyze their structure-activity relationship. Different concentrations of phenylallyl compounds were added separately, and the content of PGE2 induced by IL-1β in the culture media was measured by ELISA assay. The 50% inhibitory concentration (IC 50 ) of PGE2 was calculated. Studies showed that phenylallyl compounds could affect the PGE2 release differently in bEnd.3 cells induced by IL-1β. Close relationships were shown between the inhibitory activities and the location and number of the substituent groups. In conclusion, phenylallyl compounds exhibited inhibitory activities at different extent on PGE2 release in bEnd.3 cells stimulated by IL-1β and presented certain structure-activity relationship.展开更多
目的癫痫脑内可大量释放高迁移率族蛋白1(high mobility group box protein 1,HMGB1),但针对HMGB1与癫痫脑内血管内皮细胞过表达的耐药蛋白P-糖蛋白(P-glycoprotein,P-gp)关系的研究甚少。文中探讨HMGB1对体外培养的小鼠脑微血管内皮细...目的癫痫脑内可大量释放高迁移率族蛋白1(high mobility group box protein 1,HMGB1),但针对HMGB1与癫痫脑内血管内皮细胞过表达的耐药蛋白P-糖蛋白(P-glycoprotein,P-gp)关系的研究甚少。文中探讨HMGB1对体外培养的小鼠脑微血管内皮细胞P-gp表达的影响。方法体外培养永生化小鼠脑微血管内皮细胞株b End.3,分为不同浓度HMGB1组(10、100、500、1000 ng/m L HMGB1处理b End.3细胞8 h);不同时间HMGB1处理组(以100 ng/m L HMGB1处理b End.3细胞4、8、16、24、32 h);对照组(给予等量正常培养基)。采用实时定量PCR检测b End.3细胞中P-gp编码基因多药耐药基因1a(mdr1a)mRNA表达水平,免疫印迹法、免疫细胞化学法检测P-gp蛋白表达水平。结果 q PCR结果显示:10、100、500、1000ng/m L HMGB1组mdr1a mRNA表达量分别为1.646±0.176、1.777±0.135、1.617±0.043和1.398±0.182,较对照组(1.030±0.284)明显升高(P<0.05)。HMGB1处理4、8、16、24、32 h组mdr1a mRNA表达量分别为2.655±0.112、2.168±0.212、1.823±0.232、1.418±0.376和1.445±0.123,较对照组(1.010±0.164)明显升高(P<0.05)。免疫印迹法结果显示:与对照组比较,各浓度组P-gp蛋白表达水平均增高(P<0.05),HMGB1处理8、16 h组P-gp蛋白表达增高(P<0.05)。免疫细胞化学染色结果显示:100 ng/m L HMGB1处理16 h后P-gp蛋白表达灰度值(110.843±4.036)较对照组(160.303±2.193)明显减少(P<0.01)。结论 HMGB1能够上调小鼠脑微血管内皮细胞耐药蛋白P-gp和其编码基因mdr1a表达,可能与中枢神经系统疾病尤其是癫痫的耐药相关。展开更多
目的探索新生隐球菌GXM能否影响脑微血管内皮细胞基因的表达,为进一步研究隐球菌嗜中枢性的分子机制提供线索。方法使用Roche Nimble Gen 12×135K小鼠基因表达谱芯片,筛选小鼠脑微血管内皮细胞系b End.3与不同浓度新生隐球菌GXM作...目的探索新生隐球菌GXM能否影响脑微血管内皮细胞基因的表达,为进一步研究隐球菌嗜中枢性的分子机制提供线索。方法使用Roche Nimble Gen 12×135K小鼠基因表达谱芯片,筛选小鼠脑微血管内皮细胞系b End.3与不同浓度新生隐球菌GXM作用后差异表达的基因;结合基因本体论(Gene Ontology),使用top GO进行差异基因GO分析,结合GO语义挖掘与隐球菌侵袭中枢神经系统能力相关的差异表达基因的信息;采用荧光实时定量PCR对重要基因PIK3C2G和ADAMDEC1的表达水平变化加以验证。结果 b End.3细胞与新生隐球菌GXM作用前后基因表达对比发现,实验组GXM(90μg/m)组总共有402个基因表达上调,296个基因表达下调,GXM(180μg/m)组总共有421个基因表达上调,564个基因表达下调,细胞膜、细胞骨架、磷酸肌醇-3-激酶活化、1-磷酸肌醇-3-激酶活化、细胞紧密连接等生物过程差异表达基因较为富集;对PIK3C2G基因和ADAMDEC1基因表达水平变化进行荧光定量PCR验证,结果与芯片结果一致,基因表达水平不同程度上升,且与GXM浓度正相关。结论新生隐球菌GXM能够影响脑微血管内皮细胞基因表达,PIK3C2G基因、ADAMDEC1基因表达上调可能和隐球菌穿越血脑屏障有关。展开更多
文摘To observe the effects of phenylallyl compounds on prostaglandin E2(PGE2)release in mouse cerebral microvascular endothelial cells (bEnd.3) stimulated by IL-1β, and to analyze their structure-activity relationship. Different concentrations of phenylallyl compounds were added separately, and the content of PGE2 induced by IL-1β in the culture media was measured by ELISA assay. The 50% inhibitory concentration (IC 50 ) of PGE2 was calculated. Studies showed that phenylallyl compounds could affect the PGE2 release differently in bEnd.3 cells induced by IL-1β. Close relationships were shown between the inhibitory activities and the location and number of the substituent groups. In conclusion, phenylallyl compounds exhibited inhibitory activities at different extent on PGE2 release in bEnd.3 cells stimulated by IL-1β and presented certain structure-activity relationship.
基金supported by the Grant-in-Aid for Scientific Research(30872790)Grants-in-Aid for Young Scientists(30901631)the National Natural Science Foundation of China and the Grant from Ministry of Education of China(2009016211004)
文摘目的探索新生隐球菌GXM能否影响脑微血管内皮细胞基因的表达,为进一步研究隐球菌嗜中枢性的分子机制提供线索。方法使用Roche Nimble Gen 12×135K小鼠基因表达谱芯片,筛选小鼠脑微血管内皮细胞系b End.3与不同浓度新生隐球菌GXM作用后差异表达的基因;结合基因本体论(Gene Ontology),使用top GO进行差异基因GO分析,结合GO语义挖掘与隐球菌侵袭中枢神经系统能力相关的差异表达基因的信息;采用荧光实时定量PCR对重要基因PIK3C2G和ADAMDEC1的表达水平变化加以验证。结果 b End.3细胞与新生隐球菌GXM作用前后基因表达对比发现,实验组GXM(90μg/m)组总共有402个基因表达上调,296个基因表达下调,GXM(180μg/m)组总共有421个基因表达上调,564个基因表达下调,细胞膜、细胞骨架、磷酸肌醇-3-激酶活化、1-磷酸肌醇-3-激酶活化、细胞紧密连接等生物过程差异表达基因较为富集;对PIK3C2G基因和ADAMDEC1基因表达水平变化进行荧光定量PCR验证,结果与芯片结果一致,基因表达水平不同程度上升,且与GXM浓度正相关。结论新生隐球菌GXM能够影响脑微血管内皮细胞基因表达,PIK3C2G基因、ADAMDEC1基因表达上调可能和隐球菌穿越血脑屏障有关。