1、侵袭小室实验摘要:在 A549 细胞中过表达 human Oct-4 基因,通过对 Oct-4 过表达细胞组、空细胞组与阴性对照组进入下室的细胞数量进行测定,研究 Oct-4 基因对细胞迁移能力的影响。实验结果显示 Oct-4 基因可以促进 A549 细胞的迁移能力。为进一步深入研究 Oct-4 基因的功能提供实验数据。关键词:Oct-4,Transwell, A549,细胞迁移一、 实验原理 Transwell 小室底层的一张有通透性的膜(一般为聚碳酸酯膜),将其放置于孔板中,小室内称上室,培养板内称下室。由于聚碳酸酯膜有通透性,下层培养液中的成分可以影响到上室内的细胞。应用 Transwe
2、ll 可研究下层培养液中的成分对细胞生长、运动等的影响。肿瘤迁移实验:研究肿瘤细胞的迁移能力或特定情况下肿瘤细胞的迁移能力。常用 8.0、12.0m 膜,上室种肿瘤细胞,下室加入 FBS 或某些特定的趋化因子,肿瘤细胞会向营养成分高的下室跑,计数进入下室的细胞量可反映肿瘤细胞的迁移能力。肿瘤侵袭实验:研究肿瘤细胞的侵袭能力或特定情况下肿瘤细胞的侵袭能力。在聚碳酸酯膜上涂上一层基质胶,模仿细胞外基质,上室种肿瘤细胞,下室加入 FBS 或某些特定的趋化因子,细胞要把基质消化后才可以从上室迁移到下室,计数进入下室的细胞量测定细胞的侵袭能力。二、 实验目的 用质粒 Oct-4-EGFP 转染后的 A5
3、49 细胞与正常细胞组、阴性对照组进行比较分析,考察基因 Oct-4 对 A549 细胞的迁移能力产生的影响。三、 实验步骤 实验共分以下 4 个主要步骤:1. 质粒转染细胞:准备 A549 细胞,转染前一天按照 70-80%密度铺在 6cm 培养皿中。16h 后,按照转染试剂说明书转染细胞(8g 质粒,20l lipofectamine 2000 转染试剂) 。2. Transwell 铺板;a) 转染 12h 后,胰酶消化,收集细胞: 细胞计数后,每个样品准备 1106 cells/mL。b) 1,200rpm5min 离心后,重悬浮于 1mL 无血清培养基。c) 湿润小室: 将 300L
4、 预热的无血清培养基加入到小室中,常温放置 12h,将 ECM 膜湿润d) 将小室中的培养基去掉,24 孔板中,没有小室的孔中加入 500L 含 10%血清的培养基e) 用镊子将小室轻轻放入预先加好培养基的孔中,尽量避免产生气泡f) 每个样品取 300L,加入到小室中,即 3105 cells 加入到小室中,37,5% CO2 培养箱中培养3. 细胞培养及染色;a) 培养箱中培养 72h 后,取出小室b) 用棉棒将小室内的细胞和培养基去掉c) 24 孔板中,没有小室的孔中滴入 15 滴染色液(约 500L)d) 用镊子将小室轻轻放入预先加好染色液的孔中,尽量避免产生气泡e) 常温放置 20mi
5、n,进行染色f) 用去离子水洗 3-5 次,将背景洗掉g) 小室内边缘残留的细胞会影响实验结果,用棉棒擦干4. 统计分析。显微镜下拍照,使用 Image-Pro Plus 软件进行细胞计数。四、 实验结果 图 1. 过表达 Oct-4 对 A549 细胞迁移能力的影响从左开始依次为 A549 空细胞组,NC 对照组(过表达 EGFP),实验组(过表达 Oct-4-EGFP),每组实验均重复 3 次图 2. 过表达 Oct-4 对 A549 细胞迁移能力影响的统计分析*表示 p0.01结论:从实验结果以及进入小室的细胞的数量统计分析可以发现,A549 细胞在过表达 Oct-4-GFP 72h 以
6、后,迁移能力均高于空细胞组以及对照组(p0.01)。五、 参考文献 1. Koch KR, Zhang CO, Kaczmarek P, Barchi J Jr, Guo L, Shahjee HM, Keay S. The effect of a novel frizzled 8-related antiproliferative factor on in vitro carcinoma and melanoma cell proliferation and invasion. Invest New Drugs. 2012 Oct;30(5):1849-64.、2. Carmona FJ,
7、Villanueva A, Vidal A, Muoz C, Puertas S, Penin RM, Gom M, Lujambio A, Piulats JM, Mesa R, Snchez-Cspedes M, Mans M, Condom E, Eccles SA, Esteller M. Epigenetic disruption of cadherin-11 in human cancer metastasis. J Pathol. 2012 Oct;228(2):230-40.3. Huang W, Deng B, Wang RW, Tan QY, He Y, Jiang YG,
8、 Zhou JH. BCAR1 protein plays important roles in carcinogenesis and predicts poor prognosis in non-small-cell lung cancer. PLoS One. 2012;7(4):e36124.4. Liu D, Huang Y, Zeng J, Chen B, Huang N, Guo N, Liu L, Xu H, Mo X, Li W. Down-regulation of JAK1 by RNA interference inhibits growth of the lung ca
9、ncer cell line A549 and interferes with the PI3K/mTOR pathway. J Cancer Res Clin Oncol. 2011 Nov;137(11):1629-40.5. Mao H, Zhang L, Yang Y, Sun J, Deng B, Feng J, Shao Q, Feng A, Song B, Qu X. RhoBTB2 (DBC2) functions as tumor suppressor via inhibiting proliferation, preventing colony formation and
10、inducing apoptosis in breast cancer cells. Gene. 2011 Oct 15;486(1-2):74-80.6. Koch KR, Zhang CO, Kaczmarek P, Barchi J Jr, Guo L, Shahjee HM, Keay S. The effect of a novel frizzled 8-related antiproliferative factor on in vitro carcinoma and melanoma cell proliferation and invasion. Invest New Drug
11、s. 2012 Oct;30(5):1849-64.7. Chang HL, Pieretti-Vanmarcke R, Nicolaou F, Li X, Wei X, MacLaughlin DT, Donahoe PK. Mullerian inhibiting substance inhibits invasion and migration of epithelial cancer cell lines. Gynecol Oncol. 2011 Jan;120(1):128-348. Abouantoun TJ, MacDonald TJ. Imatinib blocks migra
12、tion and invasion of medulloblastoma cells by concurrently inhibiting activation of platelet-derived growth factor receptor and transactivation of epidermal growth factor receptor. Mol Cancer Ther. 2009 May;8(5):1137-47.9. Mendis E, Kim MM, Rajapakse N, Kim SK. The inhibitory mechanism of a novel ca
13、tionic glucosamine derivative against MMP-2 and MMP-9 expressions. Bioorg Med Chem Lett. 2009 May 15;19(10):2755-9.10. Xie Z, Choong PF, Poon LF, Zhou J, Khng J, Jasinghe VJ, Palaniyandi S, Chen CS. Inhibition of CD44 expression in hepatocellular carcinoma cells enhances apoptosis, chemosensitivity,
14、 and reduces tumorigenesis and invasion. Cancer Chemother Pharmacol. 2008 Nov;62(6):949-57.11. Park JS, Koh YS, Bang JY, Jeong YI, Lee JJ. Antitumor effect of all-trans retinoic acid-encapsulated nanoparticles of methoxy poly(ethylene glycol)-conjugated chitosan against CT-26 colon carcinoma in vitr
15、o. J Pharm Sci. 2008 Sep;97(9):4011-9.12. Jiang HB, Xu M, Wang XP. Pancreatic stellate cells promote proliferation and invasiveness of human pancreatic cancer cells via galectin-3. World J Gastroenterol. 2008 Apr 7;14(13):2023-8.13. Rajapakse N, Kim MM, Mendis E, Huang R, Kim SK. Carboxylated chitoo
16、ligosaccharides (CCOS) inhibit MMP-9 expression in human fibrosarcoma cells via down-regulation of AP-1. Biochim Biophys Acta. 2006 Dec;1760(12):1780-8.14. Laman H, Funes JM, Ye H, Henderson S, Galinanes-Garcia L, Hara E, Knowles P, McDonald N, Boshoff C. Transforming activity of Fbxo7 is mediated s
17、pecifically through regulation of cyclin D/cdk6. EMBO J. 2005 Sep 7;24(17):3104-16.15. Chen YJ, Shieh CJ, Tsai TH, Kuo CD, Ho LT, Liu TY, Liao HF. Inhibitory effect of norcantharidin, a derivative compound from blister beetles, on tumor invasion and metastasis in CT26 colorectal adenocarcinoma cells
18、. Anticancer Drugs. 2005 Mar;16(3):293-9.16. Liao HF, Chen YY, Liu JJ, Hsu ML, Shieh HJ, Liao HJ, Shieh CJ, Shiao MS, Chen YJ. Inhibitory effect of caffeic acid phenethyl ester on angiogenesis, tumor invasion, and metastasis. J Agric Food Chem. 2003 Dec 31;51(27):7907-12.17. Pan Q, Bao LW, Merajver SD.Tetrathiomolybdate inhibits angiogenesis and metastasis through suppression of the NFkappaB signaling cascade. Mol Cancer Res. 2003 Aug;1(10):701-6.