目的研究硫链丝菌肽(TST)对人鼻咽癌HNE-1细胞株增殖能力及Forkhead box protein M1(Foxm1)表达的影响。方法以MTT法分别测定不同浓度(1、2、4、8、12、16μmol/L)TST作用于人鼻咽癌HNE-1细胞48h的增殖抑制率;通过流式细胞仪(FCM)检测...目的研究硫链丝菌肽(TST)对人鼻咽癌HNE-1细胞株增殖能力及Forkhead box protein M1(Foxm1)表达的影响。方法以MTT法分别测定不同浓度(1、2、4、8、12、16μmol/L)TST作用于人鼻咽癌HNE-1细胞48h的增殖抑制率;通过流式细胞仪(FCM)检测不同浓度(1、2μmol/L)TST分别作用于HNE-1细胞48h后对其细胞周期动力学的影响;采用免疫细胞化学法和Western blot检测HNE-1细胞中Foxm1蛋白表达以及不同浓度TST作用于HNE-1细胞48hFoxm1蛋白表达的变化。结果不同浓度(1、2、4、8、12、16μmol/L)TST作用于HNE-1细胞48h后的增殖抑制率分别为8.31%、17.46%、34.28%、58.68%、87.91%、99.05%;浓度分别为1、2μmol/L的TST作用于HNE-1细胞48h后,均使HNE-1细胞停滞于G1/G0期(P<0.05),且呈剂量依赖性(P<0.05);同时将TST作用于HNE-1细胞48后,经免疫细胞化学法和Western blot均检测到Foxm1蛋白在HNE-1细胞胞质中表达显著降低(P<0.05)。结论 TST对人鼻咽癌HNE-1细胞株具有明显的增殖抑制作用,可能与降低肿瘤细胞中Foxm1蛋白表达有关。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
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.