周征 趙曼 陳杰 劉選明
3結論
集落實驗和RTPCR實驗結果顯示:在實驗所采用的顆粒濃度范圍內,Fe3O4納米顆粒對HeLa細胞基本沒有細胞毒性.對于核苷酸修復通路有缺陷的XPF細胞,Fe3O4納米顆粒可以抑制該細胞的生長和分裂,表現出一定的細胞毒性.Fe3O4納米顆粒可以使XPF細胞內CHEK1,RPA1,RPA2,RPA3基因轉錄比較明顯地增加.CHEK1基因轉錄的增加可以使XPF細胞的細胞周期停止,從而抑制其分裂和生長.而RPA1,RPA2,RPA3基因轉錄增加暗示了Fe3O4納米顆粒對XPF細胞產生某種損害.但究竟是何種損害需要進一步研究.本文的研究結果表明:Fe3O4納米顆粒在腫瘤診斷、治療上的應用必須謹慎,對有先天核苷酸剪切修復通路突變的腫瘤患者,就不能使用Fe3O4納米顆粒,否則會對患者造成額外的損害.
參考文獻
[1]陳舒懌, 古宏晨, 吳強, 等. 超順磁性鐵納米顆粒標記對視網膜前體細胞體外培養的影響J]. 國際眼科雜志, 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]刁匯玲, 朱心強, 楊軍. 復制蛋白A功能研究進展J]. 中國藥理學與毒理學雜志, 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)