目的 建立人中分化結(jié)腸腺癌細(xì)胞裸鼠皮下移植瘤模型,以探討碘-125(125I)粒子治療中分化結(jié)腸腺癌的有效性。
方法 將人中分化結(jié)腸腺癌細(xì)胞(SW480)種植到雄性BALB/c-nu/nu裸小鼠皮下,建立動(dòng)物模型,用隨機(jī)抽簽法隨機(jī)將荷瘤裸小鼠分成對(duì)照組和實(shí)驗(yàn)組(每組24只),對(duì)照組植入1顆空白粒子,實(shí)驗(yàn)組植入1顆劑量為1.48×107 Bq的125I粒子,觀察粒子植入后瘤體生長(zhǎng)情況,分別于植入后第7、14、21及28天處死實(shí)驗(yàn)組與對(duì)照組荷瘤裸小鼠,每個(gè)時(shí)相6只裸小鼠。剝?nèi)×鲶w,分別用于免疫組化SP法測(cè)定增殖細(xì)胞核抗原(PCNA)的表達(dá),原位末端標(biāo)記(TUNEL)法檢測(cè)腫瘤細(xì)胞凋亡情況。
結(jié)果 隨著放射時(shí)間的延長(zhǎng),從第10天起實(shí)驗(yàn)組腫瘤體積明顯小于對(duì)照組(P lt;0.05),從第14天開(kāi)始PCNA標(biāo)記指數(shù)表達(dá)顯著低于對(duì)照組(P lt;0.05),從第21天開(kāi)始凋亡指數(shù)顯著高于對(duì)照組(P lt;0.05)。
結(jié)論 125I粒子通過(guò)持續(xù)低劑量輻射后可以下調(diào)PCNA的表達(dá),誘導(dǎo)人中分化結(jié)腸腺癌細(xì)胞凋亡增加,是其抑制人中分化結(jié)腸腺癌增殖可能的生物學(xué)機(jī)理之一。
引用本文: 李瀅旭,羅開(kāi)元,陳億,郭晉,唐靜. 125I粒子抑制中分化結(jié)腸腺癌的實(shí)驗(yàn)研究. 中國(guó)普外基礎(chǔ)與臨床雜志, 2010, 17(10): 1062-1066. doi: 復(fù)制
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- 1. Kemp Z, Thirlwell C, Sieber O, et al. An update on the genetics of colorectal cancer [J]. Hum Mol Genet, 2004; 13(2): R177-R185..
- 2. 郁寶銘. 結(jié)直腸癌外科治療的現(xiàn)狀和展望 [J]. 中國(guó)普外基礎(chǔ)與臨床雜志, 2008; 15(9): 631-636.
- 3. Chedid AD, Villwock Mde M, Chedid MF, et al. Prognostic factors following liver resection for hepatic metastases from colorectal cancer [J]. Arq Gastroenterol, 2003; 40(3): 159-165.
- 4. 王寧, 黃志勇. PCNA和CEA在胃粘膜上皮異型增生和胃癌中的表達(dá) [J]. 診斷病理學(xué)雜志, 1994; 1(2): 94-96..
- 5. 戴林, 張學(xué)庸. 增殖細(xì)胞核抗原與胃癌 [J]. 國(guó)外醫(yī)學(xué)消化系疾病分冊(cè), 1996; 16(1): 3-5..
- 6. Nasif WA, El-Emshaty HM, Lotfy M, et al. Apoptosis dysregulation in human gastric carcinomas: relationship to anti- and pro-apoptotic protein expression [J]. Asian Pac J Cancer Prev, 2007; 8(1): 45-50..
- 7. 柴樹德, 鄭廣鈞. 粒子植入治療胸部腫瘤 [M]. 天津: 天津科技出版社, 2007: 260-265..
- 8. 付改發(fā), 雷光焰, 趙竹蓮, 等. 125I新型粒子永久植入治療惡性腫瘤的應(yīng)用與觀察 [J]. 現(xiàn)代腫瘤醫(yī)學(xué), 2004; 12(2): 108-109..
- 9. 王俊杰, 修典榮, 冉維強(qiáng). 粒子組織間治療腫瘤 [M]. 第2版. 北京: 北京大學(xué)醫(yī)學(xué)出版社, 2004: 49-56..
- 10. Hartwell LH, Kastan MB. Cell cycle control and cancer [J]. Science, 1994; 266(5192): 1821-1828..
- 11. Nasmyth K. Viewpoint: putting the cell cycle in order [J]. Science, 1996; 274(5293): 1643-1645..
- 12. Rizzo MG, Ottavio L, Travali S, et al. The promoter of the human proliferating cell nuclear antigen (PCNA) gene is bidirectional [J]. Exp Cell Res, 1990; 188(2): 286-293.
- 13. Lee CH, Lee MK, Kang CD, et al. Differential expression of hypoxia inducible factor-1 alpha and tumor cell proliferation between squamous cell carcinomas and adenocarcinomas among operable non-small cell lung carcinomas [J]. J Korean Med Sci, 2003; 18(2): 196-203..
- 14. Israels ED, Israels LG. The cell cycle [J]. Stem Cells, 2001; 19(1): 88-91..
- 15. 魏道嚴(yán), 金敖興, 黃幗, 等. 小劑量輻射對(duì)小鼠腫瘤的抑制作用 [J]. 中華放射腫瘤學(xué)雜志, 1995; 4(4): 261.
- 16. Kerr JF, Wyllie AH, Currie AR. Apoptosis: a basic biological phenomenon with wide-ranging implications in tissue kinetics [J]. Br J Cancer, 1972; 26(4): 239-257..
- 17. Zou JP, Shimizu J, Ikegame K, et al. Tumor-immunotherapy with the use of tumor-antigen-pulsed antigen-presenting cells [J]. Cancer Immunol Immunother, 1992; 35(1): 1-6.