Fe3O4纳米颗粒细胞毒性的研究
2013-04-29周征赵曼陈杰刘选明
周征 赵曼 陈杰 刘选明
3结论
集落实验和RTPCR实验结果显示:在实验所采用的颗粒浓度范围内,Fe3O4纳米颗粒对HeLa细胞基本没有细胞毒性.对于核苷酸修复通路有缺陷的XPF细胞,Fe3O4纳米颗粒可以抑制该细胞的生长和分裂,表现出一定的细胞毒性.Fe3O4纳米颗粒可以使XPF细胞内CHEK1,RPA1,RPA2,RPA3基因转录比较明显地增加.CHEK1基因转录的增加可以使XPF细胞的细胞周期停止,从而抑制其分裂和生长.而RPA1,RPA2,RPA3基因转录增加暗示了Fe3O4纳米颗粒对XPF细胞产生某种损害.但究竟是何种损害需要进一步研究.本文的研究结果表明:Fe3O4纳米颗粒在肿瘤诊断、治疗上的应用必须谨慎,对有先天核苷酸剪切修复通路突变的肿瘤患者,就不能使用Fe3O4纳米颗粒,否则会对患者造成额外的损害.
参考文献
[1]陈舒怿, 古宏晨, 吴强, 等. 超顺磁性铁纳米颗粒标记对视网膜前体细胞体外培养的影响J]. 国际眼科杂志, 2008, 8(5): 913-915.
CHEN Shuyi,GU Hongchen.WU Qiang Wu, et al. Effects of superparamagnetic iron oxide nanoparticles labeling on ability to survive of retinal stem cells in vitroJ] . Int J Ophthalmol, 2008, 8(5): 913-915.(In Chinese)
2]VOGELSTIN B, LANE D, LEVINE A J. Surfing the p53 networkJ]. Nature, 2000, 408(6810): 307-310.
3]MOMAND J, WU H H, DASGUPTA G. MDM2master regulator of the p53 tumor suppressor proteinJ]. Gene, 2000, 242(1-2): 15-29.
4]ABBAS T, DUTTA A. p21 in cancer: intricate networks and multiple activitiesJ]. Nature Reviews Cancer, 2009, 9(6): 400-414.
5]FORTIN A. APAF1 is a key transcriptional target for p53 in the regulation of neuronal cell deathJ]. The Journal of Cell Biology, 2001, 155(2): 207-216.
6]MORONI M C, HICKMAN E S, DENCHI E L, et al. Apaf1 is a transcriptional target for E2F and p53J]. Nature Cell Biology, 2001, 3(6): 552-558.
7]YOSHIDA K, MIKI Y. Role of BRCA1 and BRCA2 as regulators of DNA repair, transcription, and cell cycle in response to DNA damageJ]. Cancer Science, 2004, 95(11): 866-871.
8]LAZZARO F, GIANNATTASIO M, PUDDU F, et al. Checkpoint mechanisms at the intersection between DNA damage and repairJ]. DNA Repair, 2009, 8(9): 1055-1067.
9]BARTEK J,LUKAS J. Chk1 and Chk2 kinases in checkpoint control and cancerJ]. Cancer Cell, 2003, 3(5): 421-429.
10]刁汇玲, 朱心强, 杨军. 复制蛋白A功能研究进展J]. 中国药理学与毒理学杂志, 2006, 20(5): 433-436.
DIAO Huiling, ZHU Xinqiang, YANG Jun. Replication protein A: current progressesJ]. Chin J Pharmacol Toxicol, 2006, 20(5): 433-436.(In Chinese)