中华病理学杂志
中華病理學雜誌
중화병이학잡지
Chinese Journal of Pathology
2015年
4期
274-277
,共4页
张玲%贺婵婷%毕炀辉%刘峰%崔鹤洋%王娟%宋彬%师如意%杨斌%王芳%贾志武%赵振祥%刘静
張玲%賀嬋婷%畢煬輝%劉峰%崔鶴洋%王娟%宋彬%師如意%楊斌%王芳%賈誌武%趙振祥%劉靜
장령%하선정%필양휘%류봉%최학양%왕연%송빈%사여의%양빈%왕방%가지무%조진상%류정
黑色素瘤%转染%印迹法,蛋白质
黑色素瘤%轉染%印跡法,蛋白質
흑색소류%전염%인적법,단백질
Melanoma%Transfection%Blotting,western
目的:研究野生型BRAF及突变型BRAFV600E背景下Mps1激酶对BRAFWT/MEK/ERK通路的影响。方法(1)在BRAF野生型背景的黑色素瘤细胞中单独或联合转染pBabe-puro-GST-BRAF-WT/pBabe-puro-GST-BRAFV600E、pBabe-puro-GFP-Mps1-WT 及空载体,应用 Western blot方法来检测 Mps1及 p-ERK 表达水平。(2)用 pSUPER-Mps1反转录病毒感染 BRAF 野生型及BRAFV600E突变型背景黑色素瘤细胞,敲低内源性Mps1,Western blot法检测Mps1及p-ERK表达水平。(3)在BRAFV600E突变型背景的黑色素瘤细胞中转染pBabe-puro-GFP-Mps1,Western blot法检测Mps1及p-ERK表达水平。结果(1)在BRAF野生型背景的黑色素瘤细胞中转染pBabe-puro-GST-BRAF-WT及pBabe-puro-GFP-Mps1-WT,与未处理组及转染空载体组相比,p-ERK水平显著降低( P<0.01);在BRAF野生型背景的黑色素瘤细胞中转染pBabe-puro-GST-BRAFV600E及pBabe-puro-GFP-Mps1-WT,与未处理组及转染空载体组相比,p-ERK表达水平未发生明显变化。(2)在BRAF野生型背景的黑色素瘤细胞中敲低内源性Mps1后,与对照组相比p-ERK含量增多;而在BRAFV600E突变型黑色素瘤细胞中敲低内源性Mps1后,与对照组相比p-ERK含量未发生明显变化。(3)转染Mps1的BRAFV600E突变型细胞中 p-ERK 水平较对照组及空载体组没有发生显著变化。结论Mps1激酶和BRAFWT/MEK/ERK通路之间存在一条自动调节的负反馈回路,而癌基因BRAFV600E表现出对该负反馈回路的抵抗作用。
目的:研究野生型BRAF及突變型BRAFV600E揹景下Mps1激酶對BRAFWT/MEK/ERK通路的影響。方法(1)在BRAF野生型揹景的黑色素瘤細胞中單獨或聯閤轉染pBabe-puro-GST-BRAF-WT/pBabe-puro-GST-BRAFV600E、pBabe-puro-GFP-Mps1-WT 及空載體,應用 Western blot方法來檢測 Mps1及 p-ERK 錶達水平。(2)用 pSUPER-Mps1反轉錄病毒感染 BRAF 野生型及BRAFV600E突變型揹景黑色素瘤細胞,敲低內源性Mps1,Western blot法檢測Mps1及p-ERK錶達水平。(3)在BRAFV600E突變型揹景的黑色素瘤細胞中轉染pBabe-puro-GFP-Mps1,Western blot法檢測Mps1及p-ERK錶達水平。結果(1)在BRAF野生型揹景的黑色素瘤細胞中轉染pBabe-puro-GST-BRAF-WT及pBabe-puro-GFP-Mps1-WT,與未處理組及轉染空載體組相比,p-ERK水平顯著降低( P<0.01);在BRAF野生型揹景的黑色素瘤細胞中轉染pBabe-puro-GST-BRAFV600E及pBabe-puro-GFP-Mps1-WT,與未處理組及轉染空載體組相比,p-ERK錶達水平未髮生明顯變化。(2)在BRAF野生型揹景的黑色素瘤細胞中敲低內源性Mps1後,與對照組相比p-ERK含量增多;而在BRAFV600E突變型黑色素瘤細胞中敲低內源性Mps1後,與對照組相比p-ERK含量未髮生明顯變化。(3)轉染Mps1的BRAFV600E突變型細胞中 p-ERK 水平較對照組及空載體組沒有髮生顯著變化。結論Mps1激酶和BRAFWT/MEK/ERK通路之間存在一條自動調節的負反饋迴路,而癌基因BRAFV600E錶現齣對該負反饋迴路的牴抗作用。
목적:연구야생형BRAF급돌변형BRAFV600E배경하Mps1격매대BRAFWT/MEK/ERK통로적영향。방법(1)재BRAF야생형배경적흑색소류세포중단독혹연합전염pBabe-puro-GST-BRAF-WT/pBabe-puro-GST-BRAFV600E、pBabe-puro-GFP-Mps1-WT 급공재체,응용 Western blot방법래검측 Mps1급 p-ERK 표체수평。(2)용 pSUPER-Mps1반전록병독감염 BRAF 야생형급BRAFV600E돌변형배경흑색소류세포,고저내원성Mps1,Western blot법검측Mps1급p-ERK표체수평。(3)재BRAFV600E돌변형배경적흑색소류세포중전염pBabe-puro-GFP-Mps1,Western blot법검측Mps1급p-ERK표체수평。결과(1)재BRAF야생형배경적흑색소류세포중전염pBabe-puro-GST-BRAF-WT급pBabe-puro-GFP-Mps1-WT,여미처리조급전염공재체조상비,p-ERK수평현저강저( P<0.01);재BRAF야생형배경적흑색소류세포중전염pBabe-puro-GST-BRAFV600E급pBabe-puro-GFP-Mps1-WT,여미처리조급전염공재체조상비,p-ERK표체수평미발생명현변화。(2)재BRAF야생형배경적흑색소류세포중고저내원성Mps1후,여대조조상비p-ERK함량증다;이재BRAFV600E돌변형흑색소류세포중고저내원성Mps1후,여대조조상비p-ERK함량미발생명현변화。(3)전염Mps1적BRAFV600E돌변형세포중 p-ERK 수평교대조조급공재체조몰유발생현저변화。결론Mps1격매화BRAFWT/MEK/ERK통로지간존재일조자동조절적부반궤회로,이암기인BRAFV600E표현출대해부반궤회로적저항작용。
Objective To study the effect of Mps1 on BRAFWT/MEK/ERK pathway in the presence of wild type BRAF or BRAFV600E in melanoma.Methods Melanoma cells harboring BRAFWT genotype were transfected either with pBabe-puro-GST-BRAF-WT and/or pBabe-puro-GFP-Mps1-WT or pBabe-puro-GST-BRAFV600E and/or pBabe-puro-GFP-Mps1-WT, followed by Western blot to detect Mps1 and p-ERK expression.The melanoma cells harboring BRAFWT and BRAFV600E genotype were infected with pSUPER-Mps1 retrovirus to knockdown the endogenous Mps1 protein, followed by Western blot to detect Mps1 and p-ERK expression.Meanwhile, melanoma cells harboring BRAFV600E genotype were infected with pBabe-puro-GFP-Mps1 and Western blot was performed to detect Mps1 and p-ERK expression. Results In melanoma cells harboring BRAFWT genotype and transfected with pBabe-puro-GST-BRAF-WT and pBabe-puro-GFP-Mps1-WT, phospho-ERK levels were notably reduced as compared to either negative control or empty vector.However, cells transfected with pBabe-puro-GST-BRAFV600E and pBabe-puro-GFP-Mps1-WT, phospho-ERK levels did not change significantly compared with either negative control or empty vector.Knockout of Mps1 in BRAF wild-type cell lines led to an increased ERK activity.However, there was no significant change of ERK activity in BRAFV600E cell lines in the absence of Mps1.The expression of p-ERK in BRAFV600E mutant cell lines infected with pBabe-puro-GFP-Mps1-WT did not show any significant difference from either negative control or empty vector. Conclusions Based on these findings, it suggests that there exists an auto-regulatory negative feedback loop between the Mps1 kinase and BRAFWT/ERK signaling.Oncogenic BRAFV600E abrogates the regulatory negative feedback loop of Mps1 on the MAPK pathway.