目的 探討不同劑量X線照射對(duì)人結(jié)直腸癌Caco2細(xì)胞系中microRNA-221 (miR-221)和張力蛋白在10號(hào)染色體上同源缺失的磷酸酶(PTEN)表達(dá)的影響。
方法 常規(guī)培養(yǎng)Caco2細(xì)胞系并分為5組,分別給予不同劑量(0、2、4、6及8 Gy) 的X射線照射,24 h后提取細(xì)胞總RNA和蛋白質(zhì),應(yīng)用real-time RT-PCR方法檢測(cè)Caco2細(xì)胞中miR-221和PTEN mRNA的表達(dá)水平,用Western-blot法檢測(cè)PTEN蛋白的表達(dá)水平。
結(jié)果 Caco2細(xì)胞系在不同劑量的X線照射下,其miR-221表達(dá)水平隨著照射劑量的增加而增高,呈劑量依賴性(P<0.01);PTEN mRNA的表達(dá)水平無(wú)明顯變化(P>0.05),但PTEN蛋白表達(dá)水平則隨X線照射劑量的增加而逐漸降低,亦呈劑量依賴效應(yīng)(P<0.01)。
結(jié)論 X線照射劑量可影響結(jié)直腸癌Caco2細(xì)胞中miR-221和PTEN蛋白的表達(dá)。
引用本文: 鐘育波,孫凱,張曉檳,雷尚通,鄧海軍. X線輻射劑量對(duì)結(jié)直腸癌細(xì)胞microRNA-221和PTEN表達(dá)的影響△. 中國(guó)普外基礎(chǔ)與臨床雜志, 2013, 20(10): 1113-1116. doi: 復(fù)制
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- 1. Jang MJ, Kim JW, Min KT, et al. Prognostic significance ofmicroRNA gene polymorphisms in patients with surgically resectedcolorectal cancer[J]. Exp Ther Med, 2011, 2(6):1127-1132.
- 2. 李昂, 曹鋒, 方育, 等. 術(shù)前放化療結(jié)合全直腸系膜切除在低位進(jìn)展期直腸癌治療中的應(yīng)用[J]. 中國(guó)普外基礎(chǔ)與臨床雜志, 2012, 19(9):971-974.
- 3. Sun K, Wang W, Zeng JJ, et al. MicroRNA-221 inhibits CDK-N1C/p57 expression in human colorectal carcinoma[J]. Acta Pharmacol Sin, 2011, 32(3):375-384.
- 4. Leslie NR, Foti M. Non-genomic loss of PTEN function in cancer:not in my genes[J]. Trends Pharmacal Sci, 2011, 32(3):131-140.
- 5. 王鵬, 郭琳, 王強(qiáng), 等. PTEN、Fas/FasL和MMP-2在胃癌組織的表達(dá)及其臨床意義[J]. 中國(guó)普外基礎(chǔ)與臨床雜志, 2009, 16(12):991-995.
- 6. Bunney TD, Katan M. Phosphoinositide signalling in cancer:beyond PI3K and PTEN[J]. Nat Rev Cancer, 2010, 10(5):342- 352.
- 7. 巴一. 2012年NCCN指南結(jié)直腸癌新輔助及解救化療方案變更與解讀[J]. 中國(guó)實(shí)用外科雜志, 2012, 32(9):716-719.
- 8. Ortholan C, Romestaing P, Chapet O, et al. Correlation in rectal cancer between clinical tumor response after neoadjuvant radiotherapy and sphincter or organ preservation:10-year results of the Lyon R 96-02 randomized trial[J]. Int J Radiat Oncol Biol Phys, 2012, 83(2):165-171.
- 9. Bisceglia G, Mastrodonato N, Rucci B, et al. Effectiveness of neoadjuvant radiotherapy in the treatment of locally advanced rectal cancer:a single-center experience in 263 patients[J]. Dig Surg, 2010, 27(3):217-223.
- 10. Lin C, Yu Y, Zhao HG, et al. Combination of quercetin with radiotherapy enhances tumor radiosensitivity in vitro and in vivo[J]. Radiother Oncol, 2012, 104(3):395-400.
- 11. Schetter AJ, Okayama H, Harris CC. The role of microRNAs in colorectal cancer[J]. Cancer J, 2012, 18(3):244-252.
- 12. Sun K, Guo C, Deng HJ, et al. Construction of lentivirus-based inhibitor of hsa-microRNA-338-3p with specific secondary structure[J]. Acta Pharmacol Sin, 2013, 34(1):167-175.
- 13. Sun K, Deng HJ, Lei ST, et al. miRNA-338-3p suppresses cell growth of human colorectal carcinoma by targeting smoothened[J]. World J Gastroenterol, 2013, 19(14):2197-2207.
- 14. Zhao L, Bode AM, Cao Y, et al. Regulatory mechanisms and clinical perspectives of miRNA in tumor radiosensitivity[J]. Carcinogenesis, 2012, 33(11):2220-2227.
- 15. 陳榮, 劉光輝, 周總光, 等. 外周血microRNA作為腫瘤標(biāo)志物的研究進(jìn)展[J]. 中國(guó)普外基礎(chǔ)與臨床雜志, 2012, 19(9):1020-1023.
- 16. 孫凱, 曾俊杰, 王偉, 等. 微小RNA-221 對(duì)結(jié)直腸癌中CDK-N1C/p57表達(dá)的調(diào)控研究[J]. 中華胃腸外科雜志, 2011, 14(4):41-55.
- 17. Carracedo A, Alimonti A, Pandolfi PP. PTEN level in tumor suppression:how much is too little ?[J]. Cancer Res, 2011, 71(3):629-633.
- 18. 肖華, 張峰, 王學(xué)浩, 等. PTEN基因在過(guò)氧化物酶體增殖物激活受體γ調(diào)節(jié)肝癌細(xì)胞生長(zhǎng)中的作用[J]. 中國(guó)普外基礎(chǔ)與臨床雜志, 2007, 14(4):413-416.
- 19. Zhang C, Kang C, Wang P, et al. MicroRNA-221 and-222 regulate radiation sensitivity by targeting the PTEN pathway[J]. Int J Radiat Oncol Biol Phys, 2011, 80(1):240-248.
- 20. 張曉檳, 孫凱, 雷尚通, 等. Anti-microRNA-221通過(guò)上調(diào)PTEN蛋白表達(dá)增加結(jié)直腸癌細(xì)胞的放射增敏性[J]. 南方醫(yī)科大學(xué)學(xué)報(bào), 2013, 33(5):728-732.