目的明确长片段非编码RNA(lncRNA)X失活特异性转录本(XIST)对人鼻咽癌细胞顺铂(DDP)耐药性的影响及可能的机制。方法通过荧光定量PCR检测人鼻咽癌顺铂耐药HNE1细胞株(HNE1/DDP)中XIST的表达特征。采用MTT试验观察XIST上调和下调对HNE1/...目的明确长片段非编码RNA(lncRNA)X失活特异性转录本(XIST)对人鼻咽癌细胞顺铂(DDP)耐药性的影响及可能的机制。方法通过荧光定量PCR检测人鼻咽癌顺铂耐药HNE1细胞株(HNE1/DDP)中XIST的表达特征。采用MTT试验观察XIST上调和下调对HNE1/DDP细胞DDP耐药性的影响,并通过EdU试验和流式细胞技术观察其对HNE1/DDP细胞增殖和凋亡的影响。采用蛋白质印迹法检测XIST上调和下调对促凋亡因子程序性细胞死亡4(PDCD4)和Fas配体(Fas-L)蛋白表达的影响。结果 XIST在HNE1/DDP细胞的表达量显著高于HNE1细胞(0.57±0.06 vs 0.1±0.02,P<0.05)。下调XIST的表达显著降低HNE1/DDP细胞对DDP的耐药性(P<0.05),而上调XIST增加对DDP的耐药性(P<0.05)。下调XIST的表达显著降低HNE1/DDP细胞增殖(6.17±1.93 vs 16.59 4.86, P<0.05)并诱导细胞凋亡[(18.04±4.72)%vs(4.22±1.65)%, P<0.05],而上调XIST增加细胞增殖(25.40±7.21 vs 13.16±3.95, P<0.05)并抑制细胞凋亡[(2.82±0.88)%vs(6.46±1.75)%, P<0.05]。下调XIST的表达显著增加HNE1/DDP细胞中PDCD4(4.10±0.42 vs 1.0±0.12, P<0.05和Fas-L(3.07 0.29 vs 1.0±0.14, P<0.05)蛋白的表达,而上调XIST降低PDCD4(0.36±0.11 vs 1.0±0.18, P<0.05)和Fas-L(0.17±0.09 vs 1.0±0.21, P<0.05)蛋白的表达。结论 XIST在HNE1/DDP细胞中表达升高,下调和上调XIST的表达可分别降低和增加HNE1/DDP细胞对DDP的耐药性,其机制可能与PDCD4和Fas-L蛋白表达改变相关。展开更多
The cytogenetics of HNE- 1 cell line derived from the biopsy of nasopharyngeal carcinoma of a 27- year- old Chinese male has been investigated by chromosomal banding technique. A karyotypic characterization of subtera...The cytogenetics of HNE- 1 cell line derived from the biopsy of nasopharyngeal carcinoma of a 27- year- old Chinese male has been investigated by chromosomal banding technique. A karyotypic characterization of subteraploid and a modal number of 74 - 77 have been revealed in this cell line. All cells contained a series of non- random chromosomal rearrangements. 18 of them, including 5 isochromosomes. were present in all metaphases and 3 of them in a few one. These findings indicated that the severe DNA damage and increase of gene copies may be occurred in genome of HNE- 1 cells.展开更多
目的:探讨肿瘤坏死因子相关凋亡诱导配体(TNF related apoptosis indncing ligmard,TRAIL)联合化疗药物顺铂(Cisplatin,DDP)、5氟尿嘧啶(5-Fluorouracil,5-FU)作用于鼻咽癌HNE-1细胞株后对其细胞毒作用及凋亡影响的研究。方法:MTT法检...目的:探讨肿瘤坏死因子相关凋亡诱导配体(TNF related apoptosis indncing ligmard,TRAIL)联合化疗药物顺铂(Cisplatin,DDP)、5氟尿嘧啶(5-Fluorouracil,5-FU)作用于鼻咽癌HNE-1细胞株后对其细胞毒作用及凋亡影响的研究。方法:MTT法检测其增殖抑制率,FCM法检测细胞凋亡率。结果:TRAIL与DDP、5-FU联合作用于HNE-1细胞株时,其抑制率、凋亡率高于单独作用时的抑制率和凋亡率。结论:TRAIL与5-FU、DDP联合作用有协同抑制HNE-1细胞株增殖、诱导HNE-1细胞株凋亡的作用。展开更多
文摘目的明确长片段非编码RNA(lncRNA)X失活特异性转录本(XIST)对人鼻咽癌细胞顺铂(DDP)耐药性的影响及可能的机制。方法通过荧光定量PCR检测人鼻咽癌顺铂耐药HNE1细胞株(HNE1/DDP)中XIST的表达特征。采用MTT试验观察XIST上调和下调对HNE1/DDP细胞DDP耐药性的影响,并通过EdU试验和流式细胞技术观察其对HNE1/DDP细胞增殖和凋亡的影响。采用蛋白质印迹法检测XIST上调和下调对促凋亡因子程序性细胞死亡4(PDCD4)和Fas配体(Fas-L)蛋白表达的影响。结果 XIST在HNE1/DDP细胞的表达量显著高于HNE1细胞(0.57±0.06 vs 0.1±0.02,P<0.05)。下调XIST的表达显著降低HNE1/DDP细胞对DDP的耐药性(P<0.05),而上调XIST增加对DDP的耐药性(P<0.05)。下调XIST的表达显著降低HNE1/DDP细胞增殖(6.17±1.93 vs 16.59 4.86, P<0.05)并诱导细胞凋亡[(18.04±4.72)%vs(4.22±1.65)%, P<0.05],而上调XIST增加细胞增殖(25.40±7.21 vs 13.16±3.95, P<0.05)并抑制细胞凋亡[(2.82±0.88)%vs(6.46±1.75)%, P<0.05]。下调XIST的表达显著增加HNE1/DDP细胞中PDCD4(4.10±0.42 vs 1.0±0.12, P<0.05和Fas-L(3.07 0.29 vs 1.0±0.14, P<0.05)蛋白的表达,而上调XIST降低PDCD4(0.36±0.11 vs 1.0±0.18, P<0.05)和Fas-L(0.17±0.09 vs 1.0±0.21, P<0.05)蛋白的表达。结论 XIST在HNE1/DDP细胞中表达升高,下调和上调XIST的表达可分别降低和增加HNE1/DDP细胞对DDP的耐药性,其机制可能与PDCD4和Fas-L蛋白表达改变相关。
文摘The cytogenetics of HNE- 1 cell line derived from the biopsy of nasopharyngeal carcinoma of a 27- year- old Chinese male has been investigated by chromosomal banding technique. A karyotypic characterization of subteraploid and a modal number of 74 - 77 have been revealed in this cell line. All cells contained a series of non- random chromosomal rearrangements. 18 of them, including 5 isochromosomes. were present in all metaphases and 3 of them in a few one. These findings indicated that the severe DNA damage and increase of gene copies may be occurred in genome of HNE- 1 cells.
文摘目的:探讨肿瘤坏死因子相关凋亡诱导配体(TNF related apoptosis indncing ligmard,TRAIL)联合化疗药物顺铂(Cisplatin,DDP)、5氟尿嘧啶(5-Fluorouracil,5-FU)作用于鼻咽癌HNE-1细胞株后对其细胞毒作用及凋亡影响的研究。方法:MTT法检测其增殖抑制率,FCM法检测细胞凋亡率。结果:TRAIL与DDP、5-FU联合作用于HNE-1细胞株时,其抑制率、凋亡率高于单独作用时的抑制率和凋亡率。结论:TRAIL与5-FU、DDP联合作用有协同抑制HNE-1细胞株增殖、诱导HNE-1细胞株凋亡的作用。
