Effects of microRNA-127-3p on proliferation, invasion and migration of papillary thyroid cancer cells
-
摘要:目的
探讨微小RNA-127-3p(miR-127-3p)对乳头状甲状腺癌细胞增殖、侵袭及迁移的影响, 并明确miR-127-3p与肿瘤细胞侵袭抑制因子(SCAI)基因的靶向关系。
方法选取乳头状甲状腺癌细胞株TPC1、正常人甲状腺细胞株Nthy-ori 3-1为研究对象。将生长良好的TPC1细胞株根据转染方式的不同分为空白组(NC组,未进行任何处理)、miR-NC组(转染miR-127-3p过表达的空载体)、miR-127-3p组(转染miR-127-3p-mimics)、si-NC组(转染SCAI敲低空载体)和si-SCAI组(转染si-SCAI)。采用噻唑蓝(MTT)实验检测细胞增殖能力, Transwell小室实验检测细胞迁移、侵袭能力,实时荧光定量聚合酶链反应(PCR)检测细胞中miR-127-3p、SCAI mRNA的表达水平,蛋白质印迹法(Western blot)检测细胞SCAI蛋白表达水平。采用生物信息预测miR-127-3p与SCAI的靶向作用关系,并使用荧光素酶报告实验进行验证。
结果TPC1细胞中的miR-127-3p表达水平低于Nthy-ori 3-1细胞, SCAI蛋白、SCAI mRNA表达水平高于Nthy-ori 3-1细胞,差异有统计学意义(P < 0.01)。与NC组、miR-NC组比较, miR-127-3p组细胞48、72 h时的增殖能力、细胞迁移和侵袭能力降低,差异有统计学意义(P < 0.01)。与NC组、si-NC组比较, si-SCAI组细胞48、72 h时的增殖能力、细胞迁移和侵袭能力升高,差异有统计学意义(P < 0.01)。与NC组和miR-NC组比较, miR-127-3p组SCAI蛋白表达水平升高,差异有统计学意义(P < 0.01)。转载WT-SCAI的miR-127-3p组细胞荧光素酶活性高于转载WT-SCAI的NC组细胞,差异有统计学意义(P < 0.05)。
结论乳头状甲状腺癌细胞中的miR-127-3p、SCAI呈低表达,过表达miR-127-3p可能通过促进SCAI的表达抑制乳头状甲状腺癌细胞的增殖、侵袭和迁移。
-
关键词:
- 微小RNA-127-3p /
- 肿瘤细胞侵袭抑制因子 /
- 乳头状甲状腺癌 /
- 侵袭 /
- 转移 /
- 增殖
Abstract:ObjectiveTo investigate the effects of microRNA-127-3p (miR-127-3p) on proliferation, invasion and migration of papillary thyroid cancer cells, and to clarify the targeting relationship between miR-127-3p and tumor cell invasion inhibitor (SCAI) gene.
MethodsPapillary thyroid carcinoma cell line TPC1 and normal human thyroid cell line Nthy-ori 3-1 were selected as study objects.The well-grown TPC1 cell lines were divided into blank group (NC group, without treatment), miR-NC group (transfected with miR-127-3p overexpressed empty vector), miR-127-3p group (transfected miR-127-3p-mimics), si-NC group (transfected with empty vector of knockdown SCAI) and si-SCAI group (transfected si-SCAI) according to different transfection modes. The cell proliferation was detected by Methyl Thiazolyl Tetrazolium (MTT); cell migration and invasion was detected by transwell assay; the levels of miR-127-3p and SCAI mRNA were detected by real-time fluorescence quantitative polymerase chain reaction (PCR); the expression of SCAI protein was detected by Western blot.The relationship between miR-127-3p and SCAI was predicted by bioinformatics, and luciferase assay was used to verify its reliability.
ResultsThe level of miR-127-3p in TPC1 cells was lower than that in Nthy-ori 3-1 cells, and the levels of SCAI protein and SCAI mRNA were higher than those in Nthy-ori 3-1 cells (P < 0.01). Compared with NC group and miR-NC group, the abilities of proliferation, cell migration and invasion of the miR-127-3p group were decreased at 48 and 72 h (P < 0.01). Compared with NC group and Si-NC group, the proliferation ability, cell migration and invasion ability of the si-SCAI group increased at 48 and 72 h, and the differences were statistically significant (P < 0.01). Compared with NC and miR-NC groups, the level of SCAI protein in the miR-127-3p group was higher (P < 0.01).The luciferase activity of cells transfected with WT-SCAI in the miR-127-3p group was higher than that of cells transfected with WT-SCAI in the NC group (P < 0.05).
ConclusionThe expression of miR-127-3p and SCAI is low in papillary thyroid carcinoma cells.The miR-127-3p overexpression may inhibit the proliferation, invasion and migration of papillary thyroid carcinoma cells by promoting SCAI expression.
-
尽管多数乳头状甲状腺癌患者经过综合治疗后预后良好,但仍有部分患者出现远处转移。微小RNA在肿瘤复发中扮演着重要角色[1-2]。研究[3]表明,宫颈癌组织微小RNA-127-3p(miR-127-3p)表达降低,可抑制宫颈癌细胞恶性生物学行为。miR-127-3p过表达可抑制黑色素瘤细胞的增殖、侵袭及转移,诱导肿瘤细胞凋亡[4]。但miR-127-3p与甲状腺癌恶性表型的关系无文献报告。肿瘤细胞侵袭抑制因子(SCAI)在肿瘤组织中异常表达,参与调控肿瘤的恶性表型[5-7], 但SCAI与乳头状甲状腺癌的关系尚不清楚。研究[7-8]显示, SCAI与多种微小RNA存在靶向关系,参与调控肿瘤的恶性表型。但miR-127-3p与SCAI的关系未知。本研究分析miR-127-3p对乳头状甲状腺癌恶性表型的影响及其作用机制。
1. 材料与方法
1.1 主要试剂、细胞株及仪器
选取乳头状甲状腺癌细胞TPC1、正常人甲状腺细胞Nthy-ori 3-1(本实验保存)。主要试剂和仪器主要包括: 引物、miR-127-3p过表达载体(mimics)、miR-NC(miR-127-3p过表达的空载体)、对照质粒、si-NC、si-SCAI、突变型(MUT)-SCAI、野生型(WT)-SCAI(广州云舟生物科技股份有限公司); 鼠抗人SCAI、β-actin、羊抗鼠二抗(沈阳万类康生物有限公司); RNA提取、聚合酶链反应(PCR)试剂盒,转染试剂盒(广州云舟生物科技股份有限公司); 氯化丙定(PI)(广州云舟生物科技股份有限公司); 荧光素酶检测试剂盒(大连医友生物有限公司); 噻唑蓝(MTT, 大连医友生物有限公司); Transwell小室(Corning,美国); 酶标仪(杭州奥盛仪器有限公司); PCR仪(杭州奥盛仪器有限公司)。
1.2 细胞培养、转染及分组
利用完全DMEM培养基培养细胞,培养箱条件设置为37 ℃、5%CO2, 隔日传代、换液。取生长良好的TPC1细胞,将质粒及Lip 2000一起加入到细胞培养基中进行转染,分为空白组(NC组,无处理)、miR-NC组(转染miR-127-3p过表达的空载体)、miR-127-3p组(转染miR-127-3p-mimics)、si-NC组(转染SCAI敲低空载体)和si-SCAI组(转染si-SCAI)。
1.3 实时荧光定量PCR检测miR-127-3p、SCAI mRNA水平
取对数生长期的细胞,利用Trizol提取总RNA, 检测浓度,逆转录cDNA: 10 mmol/L dNTP1.5 μL, 5×PCR buffer 5 μL, 反转录酶1 μL, DEPC水2.5 μL, 总体积25 μL。然后采用PCR扩增,引物序列见表 1。反应体系: SYBR ® Premix Ex TaqTM(2×)12.5 μL+上下游引物(10 μmol/L) 1 μL, 加DEPC水,总体积为25 μL。反应参数: 95 ℃ 1 min、90 ℃ 20 s、50 ℃ 15 s, 共40个循环。2-△△Ct法表示表达量。内参为 U6 、GAPDH。所有实验均重复3次。
表 1 目标引物序列基因 上游 下游 miR-127-3p 5′-GACCCAGTTCAAGTAATTCAG-3′ 5′-CGAGCCAAGTAATGGAGAA-3′ SCAI 5′-CGGCTACATTGTCTGCCTG-3′ 5′-CAGTGC GTGTCGTGGAGT-3′ GAPDH 5′-TGCACCACCAACTGCTTAGC-3′ 5′-GGCATGGACTGTGGTTGAG-3′ U6 5′-CTCGCTTCGGCAGCACA-3′ 5′-AACGCTTCACGAATTTGCGT-3′ 1.4 MTT实验
将细胞接种于96孔板,培养箱继续培养,分别于0、48、72、96 h检测细胞活力,检测前加入20 μL MTT, 培养4 h, 然后加入150 μL DMSO, 水平摇床摇动30 min,上机检测光密度(OD)值。每组5个复孔。
1.5 Transwell小室实验
迁移实验: 上室中加入1×105个细胞,用无血清培养基配制,下室加入含20%血清培养基, 48 h后去除上室未穿细胞,用4%多聚甲醛固定, 0.1%结晶紫染色,洗涤,计数。侵袭实验: 首先用DMEM培养基按照1∶8稀释基质胶,上室中加40 μL基质胶,其余同上。所有实验均重复3次。
1.6 Western blot法检测SCAI蛋白的表达
去除培养基,加入裂解液提取总蛋白。配制3%胶,点样, SDS-PAGE电泳2 h将蛋白转移至膜上, 5%脱脂奶粉封闭1 h, 加入SCAI(1∶1 000)、β-actin(1∶1 000)抗体冰箱过夜,次日加入二抗(1∶1 000), 室温1 h, 洗涤3次后上机曝光, Image J软件分析光密度。所有实验均重复3次。
1.7 荧光素酶实验验证miR-127-3p与SCAI的靶向关系
分别将MUT-SCAI、WT-SCAI质粒分别转入NC组和miR-127-3p组, 48 h后检测各组细胞荧光活性。所有实验均重复3次。
1.8 统计学方法
使用SPSS11.0软件处理和分析数据,计量资料以(x±s)表示, 2组间比较行t检验,多组比较行单因素方差分析。P<0.05为差异有统计学意义。
2. 结果
2.1 乳头状甲状腺癌细胞、正常人甲状腺细胞中的miR-127-3p表达
TPC1细胞中的miR-127-3p表达水平低于Nthy-ori 3-1细胞,差异有统计学意义(P<0.01)。见图 1。
2.2 乳头状甲状腺癌细胞及正常甲状腺细胞中SCAI蛋白、SCAI mRNA表达
TPC1细胞中SCAI蛋白、SCAI mRNA表达均低于Nthy-ori 3-1细胞,差异有统计学意义(P<0.01)。见图 2。
2.3 miR-127-3p过表达对TPC1细胞增殖、迁移和侵袭的影响
miR-127-3p组细胞中的miR-127-3p表达水平高于NC组、miR-NC组,差异有统计学意义(P<0.05), 但NC组、miR-NC组的表达水平差异无统计学意义(P>0.05)。miR-127-3p组48、72 h细胞OD值、迁移和侵袭细胞数量低于NC组、miR-NC组,差异有统计学意义(P<0.05); NC组、miR-NC组的细胞活力、细胞迁移和细胞侵袭数量比较,差异无统计学意义(P>0.05)。见图 3。
2.4 抑制SCAI表达对TPC1细胞增殖、迁移和侵袭的影响
si-SCAI组细胞中SCAI蛋白及SCAI mRNA水平低于NC组、si-NC组,差异有统计学意义(P<0.05), 但NC组、miR-NC组细胞中SCAI蛋白及SCAI mRNA水平比较,差异无统计学意义(P>0.05)。si-SCAI组48、72 h细胞OD值、迁移和侵袭细胞数量高于NC组、si-NC组,差异有统计学意义(P<0.05)。见图 4。
2.5 各组细胞SCAI蛋白表达
miR-127-3p组SCAI蛋白表达水平高于NC组、miR-NC组,差异有统计学意义(P<0.05)。见图 5。
2.6 miR-127-3p与SCAI的靶向关系
生物信息分析显示, miR-127-3p与SCAI存在互补碱基。转载WT-SCAI的miR-127-3p组细胞荧光素酶活性高于转载WT-SCAI的NC组细胞,差异有统计学意义(P<0.05)。见图 6。
3. 讨论
大量文献[9-12]报道,微小RNA在乳头状甲状腺癌进展中发挥重要作用。miR-127-3p在多种肿瘤组织中高表达。研究[13]表明,下调miR-127-3p能抑制肝癌进展。miR-127-3p可抑制黑色素瘤细胞的恶性行为,促进凋亡[14]。研究[15]发现,卵巢癌患者血清miR-127-3p与临床病理特征有关。本研究结果显示,乳头状甲状腺癌细胞中miR-127-3p呈低表达,提示miR-127-3p可能是乳头状甲状腺癌的抑癌基因。为了进一步研究miR-127-3p在乳头状甲状腺癌发生、发展中的作用,本研究构建了miR-127-3p过表达乳头状甲状腺癌细胞,并分析了其对肿瘤细胞恶性表型的影响。结果显示, miR-127-3p过表达的细胞增殖、侵袭及迁移能力显著降低。研究[16-20]发现, miR-127在前列腺癌、膀胱癌及结肠癌组织中呈低表达,机制可能是miR-127启动子区域的异常甲基化,通过去甲基化药物激活miR-127表达,并抑制其靶标B细胞淋巴瘤细胞6(Bcl-6)抑制肿瘤发生。
miR-127-3p靶向多个基因行使其功能,如miR-127-3p可通过靶向MAPK4抑制卵巢癌肿瘤的生长[21]。另外, miR-127-3p可通过Wnt/β-catenin信号通路抑制肿瘤细胞的增殖[22]。SCAI是一种抑癌基因,参与肿瘤细胞的恶性生物学行为。另外,在多种肿瘤中SCAI可被多种微小RNA抑制[23-24]。本研究结果显示,乳头状甲状腺癌细胞中SCAI呈高表达,抑制SCAI后增强了细胞恶性生物学行为,提示SCAI与肿瘤进展有关。许娟秀等[25]研究发现, miR-135a可靶向SCAI抑制宫颈癌糖酵解。研究[26]发现,在肝癌细胞中SCAI可作为miR-425-5p的靶基因,当其被miR-425-5p抑制后可以促进肝癌细胞的上皮间质转化(EMT)和转移。上述结果证实,miR-127-3p通过负向调控SCAI的表达抑制甲状腺癌细胞的增殖、侵袭及迁移。
综上所述,乳头状甲状腺癌中miR-127-3p呈低表达,可抑制细胞恶性生物学行为,机制可能与靶向SCAI有关,但具体机制有待进一步探讨。
-
表 1 目标引物序列
基因 上游 下游 miR-127-3p 5′-GACCCAGTTCAAGTAATTCAG-3′ 5′-CGAGCCAAGTAATGGAGAA-3′ SCAI 5′-CGGCTACATTGTCTGCCTG-3′ 5′-CAGTGC GTGTCGTGGAGT-3′ GAPDH 5′-TGCACCACCAACTGCTTAGC-3′ 5′-GGCATGGACTGTGGTTGAG-3′ U6 5′-CTCGCTTCGGCAGCACA-3′ 5′-AACGCTTCACGAATTTGCGT-3′ -
[1] WANG N, QIAN L X. Predictive factors for occult bilateral papillary thyroid carcinoma[J]. Acad Radiol, 2021, 28(3): 328-332. doi: 10.1016/j.acra.2020.01.023
[2] SALIMINEJAD K, KHORRAM KHORSHID H R, SOLEYMANI FARD S, et al. An overview of microRNAs: biology, functions, therapeutics, and analysis methods[J]. J Cell Physiol, 2019, 234(5): 5451-5465. doi: 10.1002/jcp.27486
[3] 李婧, 姚婷婷, 刘昀昀, 等. Hsa-miR-127-3p在宫颈癌组织中的表达及对宫颈癌细胞迁移和侵袭能力的影响[J]. 现代妇产科进展, 2017, 26(7): 506-508. doi: 10.13283/j.cnki.xdfckjz.2017.07.006 [4] 魏丽, 连红梅, 刘鹏, 等. MiR-127-3p靶向MAPK4对葡萄膜黑色素瘤细胞增殖、凋亡、迁移和侵袭的影响[J]. 中山大学学报: 医学科学版, 2020, 41(1): 76-85. https://www.cnki.com.cn/Article/CJFDTOTAL-ZSYK202001012.htm [5] BOX L C, BLANKENSHIP J C, HENRY T D, et al. SCAI position statement on the performance of percutaneous coronary intervention in ambulatory surgical centers[J]. Catheter Cardiovasc Interv, 2020, 96(4): 862-870. doi: 10.1002/ccd.28991
[6] ZHANG Y, TANG K Q, CHEN L Z, et al. Exosomal CircGDI2 suppresses oral squamous cell carcinoma progression through the regulation of miR-424-5p/SCAI axis[J]. Cancer Manag Res, 2020, 12: 7501-7514. doi: 10.2147/CMAR.S255687
[7] LUO X, ZHANG X L, PENG J M, et al. MiR-371b-5p promotes cell proliferation, migration and invasion in non-small cell lung cancer via SCAI[J]. Biosci Rep, 2020, 40(11): BSR20200163. doi: 10.1042/BSR20200163
[8] CHEN N, YANG H, SONG L J, et al. MicroRNA-409-3p promotes osteoblastic differentiation via activation of Wnt/β-catenin signaling pathway by targeting SCAI[J]. Biosci Rep, 2021, 41(1): BSR20201902. doi: 10.1042/BSR20201902
[9] DUAN Y Y, ZHANG Y, PENG W, et al. MiR-7-5pand miR-451 as diagnostic biomarkers for papillary thyroid carcinoma in formalin-fixed paraffin-embedded tissues[J]. Pharmazie, 2020, 75(6): 266-270.
[10] YUAN Q L, FAN Y X, LIU Z, et al. MiR-744-5p mediates lncRNA HOTTIP to regulate the proliferation and apoptosis of papillary thyroid carcinoma cells[J]. Exp Cell Res, 2020, 392(1): 112024. doi: 10.1016/j.yexcr.2020.112024
[11] LIU F Z, LOU K X, ZHAO X T, et al. MiR-214 regulates papillary thyroid carcinoma cell proliferation and metastasis by targeting PSMD10[J]. Int J Mol Med, 2018, 42(6): 3027-3036.
[12] ZHOU S L, TANG Q L, ZHOU S X, et al. MiR-296-5p suppresses papillary thyroid carcinoma cell growth via targeting PLK1[J]. Eur Rev Med Pharmacol Sci, 2019, 23(5): 2084-2091.
[13] 张玉蓉, 贾俊枝, 徐国明, 等. MiR-127-3p靶向MAPK4对肝癌HepG2细胞株生物学特性的影响[J]. 中国免疫学杂志, 2020, 36(11): 1330-1337. https://www.cnki.com.cn/Article/CJFDTOTAL-ZMXZ202011010.htm [14] WAN N, YANG W X, CHENG H Y, et al. FOXD3-AS1 contributes to the progression of melanoma via miR-127-3p/FJX1 axis[J]. Cancer Biother Radiopharm, 2020, 35(8): 596-604.
[15] ZHANG S T, ZHANG X P, FU X Q, et al. Identification of common differentially-expressed miRNAs in ovarian cancer cells and their exosomes compared with normal ovarian surface epithelial cell cells[J]. Oncol Lett, 2018, 16(2): 2391-2401.
[16] ZHOU Z B, HUANG G X, FU Q, et al. circRNA. 33186 contributes to the pathogenesis of osteoarthritis by sponging miR-127-5p[J]. Mol Ther, 2019, 27(3): 531-541.
[17] JI L, ZHU Z N, HE C J, et al. MiR-127-3p targets KIF3B to inhibit the development of oral squamous cell carcinoma[J]. Eur Rev Med Pharmacol Sci, 2019, 23(2): 630-640.
[18] YUAN R Q, ZHANG X M, FANG Y, et al. MiR-127-3p inhibits the proliferation of myocytes by targeting KMT5a[J]. Biochem Biophys Res Commun, 2018, 503(2): 970-976.
[19] ZHAI L L, WU R M, HAN W H, et al. MiR-127 enhances myogenic cell differentiation by targeting S1PR3[J]. Cell Death Dis, 2017, 8(3): e2707.
[20] LIU X, MENG Z, XING Y G, et al. MiR-127 inhibits ovarian cancer migration and invasion by up-regulating ITGA6[J]. Minerva Med, 2021, 112(2): 309-310.
[21] DU S Y, HUANG X X, LI N M, et al. MiR-127-3p inhibits proliferation of ovarian cancer in rats through down-regulating MAPK4[J]. Eur Rev Med Pharmacol Sci, 2020, 24(20): 10383-10390.
[22] DONG J S, LI L, FANG X, et al. Exosome-encapsulated microRNA-127-3p released from bone marrow-derived mesenchymal stem cells alleviates osteoarthritis through regulating CDH11-mediated Wnt/β-catenin pathway[J]. J Pain Res, 2021, 14: 297-310.
[23] LUO X, ZHANG X L, PENG J M, et al. MiR-371b-5p promotes cell proliferation, migration and invasion in non-small cell lung cancer via SCAI[J]. Biosci Rep, 2020, 40(11): BSR20200163.
[24] CHEN N, YANG H, SONG L J, et al. MicroRNA-409-3p promotes osteoblastic differentiation via activation of Wnt/β-catenin signaling pathway by targeting SCAI[J]. Biosci Rep, 2021, 41(1): BSR20201902.
[25] 许娟秀, 吴海根. 沉默HBXIP通过抑制miR-135a调控宫颈癌CaSki细胞的SCAI表达、上皮-间充质转化和糖酵解[J]. 中国病理生理杂志, 2019, 35(8): 1423-1431. https://www.cnki.com.cn/Article/CJFDTOTAL-ZBLS201908012.htm [26] FANG F, SONG T Q, ZHANG T, et al. MiR-425-5p promotes invasion and metastasis of hepatocellular carcinoma cells through SCAI-mediated dysregulation of multiple signaling pathways[J]. Oncotarget, 2017, 8(19): 31745-31757.
-
期刊类型引用(1)
1. 王继绪,张国栋,陈茂丽,韩永峰. 乙型肝炎病毒相关性肝细胞肝癌患者血清miR-125a-5p、 miR-127-3p表达及临床意义. 国际检验医学杂志. 2024(15): 1860-1866 . 百度学术
其他类型引用(0)