医学研究生学报
醫學研究生學報
의학연구생학보
JOURNAL OF MEDICAL POSTGRADUATE
2015年
2期
141-145
,共5页
陈艳%余年%解渊%张亢%狄晴
陳豔%餘年%解淵%張亢%狄晴
진염%여년%해연%장항%적청
高迁移率族蛋白1%脑微血管内皮细胞%多药耐药基因1a%P-糖蛋白%癫痫
高遷移率族蛋白1%腦微血管內皮細胞%多藥耐藥基因1a%P-糖蛋白%癲癇
고천이솔족단백1%뇌미혈관내피세포%다약내약기인1a%P-당단백%전간
High-mobility group box-1%Brain microvascular endothelial cell%Multidrug resistance gene 1a%P-glycoprotein%Epilepsy
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bEnd.3,分为不同浓度HMGB1组(10、100、500、1000 ng/mL HMGB1处理bEnd.3细胞8 h);不同时间HMGB1处理组(以100 ng/mL HMGB1处理bEnd.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bEnd.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 qPCR结果显示:10、100、500、1000 ng/mL 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/mL 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。
目的:癲癇腦內可大量釋放高遷移率族蛋白1(high mobility group box protein 1, HMGB1),但針對HMGB1與癲癇腦內血管內皮細胞過錶達的耐藥蛋白P-糖蛋白(P-glycoprotein, P-gp)關繫的研究甚少。文中探討HMGB1對體外培養的小鼠腦微血管內皮細胞P-gp錶達的影響。方法體外培養永生化小鼠腦微血管內皮細胞株bEnd.3,分為不同濃度HMGB1組(10、100、500、1000 ng/mL HMGB1處理bEnd.3細胞8 h);不同時間HMGB1處理組(以100 ng/mL HMGB1處理bEnd.3細胞4、8、16、24、32 h);對照組(給予等量正常培養基)。採用實時定量PCR檢測bEnd.3細胞中P-gp編碼基因多藥耐藥基因1a (mdr1a)mRNA錶達水平,免疫印跡法、免疫細胞化學法檢測P-gp蛋白錶達水平。結果 qPCR結果顯示:10、100、500、1000 ng/mL HMGB1組mdr1a mRNA錶達量分彆為1.646±0.176、1.777±0.135、1.617±0.043和1.398±0.182,較對照組(1.030±0.284)明顯升高(P<0.05)。 HMGB1處理4、8、16、24、32 h組mdr1a mRNA錶達量分彆為2.655±0.112、2.168± 0.212、1.823±0.232、1.418±0.376和1.445±0.123,較對照組(1.010±0.164)明顯升高(P<0.05)。免疫印跡法結果顯示:與對照組比較,各濃度組P-gp蛋白錶達水平均增高(P<0.05),HMGB1處理8、16 h組P-gp蛋白錶達增高(P<0.05)。免疫細胞化學染色結果顯示:100 ng/mL HMGB1處理16 h後P-gp蛋白錶達灰度值(110.843±4.036)較對照組(160.303±2.193)明顯減少(P<0.01)。結論 HMGB1能夠上調小鼠腦微血管內皮細胞耐藥蛋白P-gp和其編碼基因mdr1a錶達,可能與中樞神經繫統疾病尤其是癲癇的耐藥相關。
목적:전간뇌내가대량석방고천이솔족단백1(high mobility group box protein 1, HMGB1),단침대HMGB1여전간뇌내혈관내피세포과표체적내약단백P-당단백(P-glycoprotein, P-gp)관계적연구심소。문중탐토HMGB1대체외배양적소서뇌미혈관내피세포P-gp표체적영향。방법체외배양영생화소서뇌미혈관내피세포주bEnd.3,분위불동농도HMGB1조(10、100、500、1000 ng/mL HMGB1처리bEnd.3세포8 h);불동시간HMGB1처리조(이100 ng/mL HMGB1처리bEnd.3세포4、8、16、24、32 h);대조조(급여등량정상배양기)。채용실시정량PCR검측bEnd.3세포중P-gp편마기인다약내약기인1a (mdr1a)mRNA표체수평,면역인적법、면역세포화학법검측P-gp단백표체수평。결과 qPCR결과현시:10、100、500、1000 ng/mL HMGB1조mdr1a mRNA표체량분별위1.646±0.176、1.777±0.135、1.617±0.043화1.398±0.182,교대조조(1.030±0.284)명현승고(P<0.05)。 HMGB1처리4、8、16、24、32 h조mdr1a mRNA표체량분별위2.655±0.112、2.168± 0.212、1.823±0.232、1.418±0.376화1.445±0.123,교대조조(1.010±0.164)명현승고(P<0.05)。면역인적법결과현시:여대조조비교,각농도조P-gp단백표체수평균증고(P<0.05),HMGB1처리8、16 h조P-gp단백표체증고(P<0.05)。면역세포화학염색결과현시:100 ng/mL HMGB1처리16 h후P-gp단백표체회도치(110.843±4.036)교대조조(160.303±2.193)명현감소(P<0.01)。결론 HMGB1능구상조소서뇌미혈관내피세포내약단백P-gp화기편마기인mdr1a표체,가능여중추신경계통질병우기시전간적내약상관。
[Abstract ] Objective High-mobility group box-1 (HMGB1) is abundantly released in the epileptogenic brain tissue , but few reports are seen about the effect of HMGB 1 on the expression of P-glycoprotein ( P-gp) in the vascular endothelial cells of the epi-leptogenic tissue .This study is to explore whether HMGB 1 can regulate P-gp expression in the brain microvascular endothelial cells of the mouse in vitro . Methods Immortalized brain microvascular endothelial bEnd .3 cells of the mouse were cultured in vitro and al-located to different concentration groups ( treated with culture medium containing 10 , 100 , 500 , and 1000 ng/mL HMGB1 for 8 hours), treatment duration groups (treated with culture medium containing 100 ng/mL HMGB1 for 4, 8, 16, 24, and 32 hours), and a control group ( treated with culture medium without HMGB 1 ) .The mRNA expression of P-gp-encoding gene-multidrug resistance gene 1a (mdr1a) was detected by real-time qPCR, and its protein expression determined by Western blot and immunocytochemistry . Results The results of qPCR manifested that the expressions of mdr 1a mRNA were 1.646 ±0.176, 1.777 ±0.135, 1.617 ±0.043, and 1.398 ±0.182 in the 10, 100, 500, and 1000 ng/mL HMGB1 groups, respectively, significantly higher than 1.030 ±0.284 in the control group (P<0.05), and so were those in the 4, 8, 16, 24 h, and 32 h groups (2.655 ±0.112, 2.168 ±0.212, 1.823 ± 0.232, 1.418 ±0.376, and 1.445 ±0.123) than in the control (1.010 ±0.164) (P <0.05).Western blot showed a significant increase in the P-gp protein expression in all the concentration groups (P<0.05) as well as in the 8 h and 16 h treatment duration groups as compared with the control group (P<0.05).Immunocytochemis-try also revealed a higher P-gp expression in the HMGB1-treated than in the control cells (P<0.01). Conclusion HMGB1 can upregu-late the expressions of mdr1a mRNA and P-gp protein in the brain microvascular endothelial cells of the mouse , which may associated with drug resistance of central nervous system diseases , especially that of epilepsy .