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95例滑膜肉瘤的综合治疗及预后影响因素

陶芳, 王国文, 韩秀鑫, 马育林, 张超, 李丽丽

陶芳, 王国文, 韩秀鑫, 马育林, 张超, 李丽丽. 95例滑膜肉瘤的综合治疗及预后影响因素[J]. 肿瘤防治研究, 2019, 46(6): 519-525. DOI: 10.3971/j.issn.1000-8578.2019.18.1426
引用本文: 陶芳, 王国文, 韩秀鑫, 马育林, 张超, 李丽丽. 95例滑膜肉瘤的综合治疗及预后影响因素[J]. 肿瘤防治研究, 2019, 46(6): 519-525. DOI: 10.3971/j.issn.1000-8578.2019.18.1426
TAO Fang, WANG Guowen, HAN Xiuxin, MA Yulin, ZHANG Chao, LI Lili. Prognostic Factors and Comprehensive Treatment of 95 Synovial Sarcoma Patients[J]. Cancer Research on Prevention and Treatment, 2019, 46(6): 519-525. DOI: 10.3971/j.issn.1000-8578.2019.18.1426
Citation: TAO Fang, WANG Guowen, HAN Xiuxin, MA Yulin, ZHANG Chao, LI Lili. Prognostic Factors and Comprehensive Treatment of 95 Synovial Sarcoma Patients[J]. Cancer Research on Prevention and Treatment, 2019, 46(6): 519-525. DOI: 10.3971/j.issn.1000-8578.2019.18.1426

95例滑膜肉瘤的综合治疗及预后影响因素

基金项目: 

国家自然科学基金 81702161

国家自然科学基金 81602363

国家自然科学基金 81872184

详细信息
    作者简介:

    陶芳(1990-),女,硕士在读,主要从事骨与软组织肿瘤的临床研究

    通讯作者:

    王国文,E-mail: wgwhrb@163.com

  • 中图分类号: R738.5;R730.58

Prognostic Factors and Comprehensive Treatment of 95 Synovial Sarcoma Patients

More Information
  • 摘要:
    目的 

    探讨滑膜肉瘤患者以手术为主综合治疗的临床疗效及生存预后影响因素。

    方法 

    回顾性分析95例滑膜肉瘤患者的病历资料,统计分析患者治疗后复发、转移及生存情况,并通过Log rank法和Cox比例风险回归模型分别进行生存预后相关影响因素分析。

    结果 

    患者随访时间为8~296月,中位随访时间为62月。所有患者的中位总体生存期为76月(95%CI: 67.9~84.1),5年生存率70.7%,5年无进展生存率22.5%。多因素分析显示AJCC分期(P < 0.001)、肿瘤发病部位(P=0.027)、肿瘤大小(P=0.015)、辅助治疗时机(P=0.004)、治疗方案(P=0.005)和复发与转移(P=0.016)均为滑膜肉瘤的独立生存预后因素。化疗周期数≥4和 < 4的患者中位生存时间分别为84和66月(P=0.007)。

    结论 

    多种因素能够影响滑膜肉瘤的生存预后情况;术后辅助化疗、放疗、联合放化疗均能延长患者生存时间,术后随即联合辅助治疗的效果更佳;化疗患者接受4个及以上化疗周期治疗效果更佳。

     

    Abstract:
    Objective 

    To investigate prognostic factors and the efficacy of surgery-based comprehensive treatment for patients with synovial sarcoma.

    Methods 

    We retrospectively analyzed the medical records of 95 synovial sarcoma patients. Factors associated with survival were identified with univariate analysis by log-rank test and multivariate analysis by Cox proportional hazard regression model. Kaplan-Meier method was applied to do the survival analysis.

    Results 

    Patients were followed up for 8-296 months and the median follow-up time was 62 months. The median overall survival time of all patients was 76 months (95%CI: 67.9-84.1 months). The 5-year OS and PFS of this cohort were 70.7% and 22.5%, respectively. Multivariable analysis indicated that AJCC staging at diagnosis (P < 0.001), primary tumor site (P=0.027), tumor size (P=0.015), time of adjuvant therapy (P=0.004), therapeutic regimen (P=0.005) and recurrence and metastasis (P=0.016) were independent prognostic factors of OS. Kaplan-Meier method showed that the median overall survival time of patients with more than 4 courses chemotherapy was 84 months, significantly better than 66 months of those patients with less than 4 courses(P=0.007).

    Conclusion 

    Several clinical features could affect the prognosis of synovial sarcoma. Adjuvant chemotherapy, adjuvant radiotherapy and combining radiotherapy and chemotherapy are all effective for prolonging patients' survival time. After surgery, a sooner adjuvant therapy before disease progression could achieve better treatment effect. For patients accepting chemotherapy, 4 and above chemotherapy courses are favorable to obtain better therapeutic results.

     

  • 子宫内膜癌是女性生殖系统常见的恶性肿瘤之一,发病率呈上升趋势,好发于绝经后女性。近年研究表明,甲壳质酶蛋白40(Chitinase-3-like Protein 1, YKL-40)可作为子宫内膜癌的候选肿瘤标志物之一,在肿瘤细胞增殖[1]、血管形成[2]和抗凋亡[3]中具有枢纽作用,但具体的生物学功能仍需进一步探索。本课题组前期临床研究也表明,YKL-40在子宫内膜癌组织和血清中的表达高于子宫肌瘤患者以及健康者[4]

    结合前期研究工作,本课题提出:降低YKL-40基因的同时可降低子宫内膜癌细胞的抗凋亡能力以及提高癌细胞对顺铂化疗的敏感度。本实验通过siRNA(small interfering RNA)技术沉默子宫内膜癌细胞中YKL-40基因的表达,采用MTT实验、流式细胞仪及Annexin V-PE/7AAD双染法检测转染前后子宫内膜癌细胞对顺铂化疗敏感度的变化,进而探讨沉默YKL-40基因对子宫内膜癌细胞增殖的影响以及YKL-40与子宫内膜癌细胞对顺铂化疗敏感度的关系,为进一步探讨其影响增殖的机制、子宫内膜癌化疗耐药机制以及提高化疗效果提供思路和研究基础。

    人子宫内膜癌HEC-1A细胞由广西医科大学肿瘤医学院妇瘤科张洁清教授馈赠,DMEM/F12培养液购于美国HyClone公司,胎牛血清购于美国Gibco公司。YKL-40基因引物由日本Takara公司设计并合成。Annexin V-PE/7AAD凋亡试剂盒购于美国BD公司。顺铂购自山东齐鲁药业。

    人子宫内膜癌HEC-1A细胞株用DMEM/F12培养液(含10%胎牛血清和1%双抗)置于37℃、5%CO2培养箱中培养,细胞融合度达80%时进行传代,取对数生长期细胞进行实验。

    一条针对YKL-40的siRNA由上海汉恒公司合成。将人子宫内膜癌HEC-1A细胞分为三组:空白对照组、空载体组、siRNA实验组。siRNA实验组转染携带siRNA的慢病毒,空载体组转染只含绿色荧光蛋白(GFP)的空载病毒,空白对照组不进行转染。实验组转染的特异性siRNA序列为:GACTCTCTTTCTGTCGGA。选择细胞最佳病毒感染复数MOI值为20时进行转染,并加入8 μg/ml聚凝胺助转染。转染效率(%)=绿色荧光蛋白标记的细胞/细胞总数×100%。转染成功后用1 μg/ml嘌呤霉素筛选2~3周,耐嘌呤霉素的细胞用于后续实验。

    按照TRIzol试剂使用说明书提取各组细胞RNA,根据qRT-PCR试剂盒说明书进行稀释和后续操作。反转录后cDNA扩增配置20 μl反应体系,置入ABI stepone plus实时荧光定量PCR仪进行反应,设置反应条件为:95℃ 30 s,循环1次;95℃ 5 s;60℃ 34 s,40个循环。YKL-40引物:F: 5’-ATCACCAAGGAGCCAAACATC-3’;R: 5’-GGGGAAGTAGGATAGGGGACA-3’。内参照β肌动蛋白(β-actin)引物:F: 5’-ACACTGTGCCCATCTACG-3’;R: 5’-TGTCACGCACGATTTCC-3’。根据公式2-∆∆Ct[5](其中Ct值为循环阈值)计算各组细胞中YKL-40 mRNA的相对表达水平。实验重复三次。

    以5×104个/孔细胞接种到96孔板,每孔100 μl。设置5~7个复孔。细胞贴壁后加入不同浓度梯度的顺铂(山东齐鲁药业),使终浓度为100、50、25、12.5、6.25、3.125和0 μmol/L,同一培养条件下培养48 h,每孔加5 mg/ml MTT溶液20 μl,继续孵育4 h后终止培养,弃上清液。每孔加150 μl DMSO(dimethyl sulfoxide),振荡10 min,使结晶物充分溶解。在酶标仪上测定各孔吸光度值(570 nm处),以药物浓度为横坐标,吸光度值为纵坐标绘制细胞生长曲线。实验重复三次。

    人子宫内膜癌细胞分为两组,一组不加任何处理因素(A组),一组加入25 μmol/L顺铂(B组),继续培养48 h后用qRT-PCR实验检测两组细胞中YKL-40基因表达情况。实验过程如上。实验重复三次。

    将各组子宫内膜癌细胞中加入25 μmol/L顺铂,继续培养48 h后用Annexin V-PE/7AAD双染法检测各组细胞凋亡情况。用胰酶分别消化经过相同浓度顺铂处理的各组癌细胞,调整细胞浓度为1×107个/毫升,各取100 μl。加入1 ml PBS洗涤细胞两次,弃上清液,按凋亡试剂盒要求将10×Binding Buffer稀释成1×Binding Buffer。各组细胞加入1×Binding Buffer 100 μl,并加入5 μl Annexin V-PE和5 μl 7AAD,避光室温孵育15 min后加入1×Binding Buffer 400 μl,1 h内置于流式细胞仪上检测各组细胞凋亡情况。实验重复三次。

    实验数据均采用SPSS17.0软件进行分析,以(x± s)表示,两组间数据用两独立样本t检验进行分析,三组间数据采用方差分析,P < 0.05为差异有统计学意义。

    经慢病毒转染后,转染效率达80%以上,转染成功的细胞带有绿色荧光,表明转染成功,见图 1

    图  1  转染siRNA实验组同一视野下明场和荧光场图(×10)
    Figure  1  Transfection of siRNA on same view of bright and fluorescence field (×10)
    A: HEC-1A cells were observed under bright field microscopy; B: on the same field, HEC-1A cells were observed under a fluorescence microscope, and siRNA with fluorescence was successfully transfected into HEC-1A cells

    三组均数经SNK、LSD两两比较,实验组YKL-40 mRNA表达量明显低于空载体组(P=0.036)和空白对照组(P=0.005),而空白对照组和空载体组间差异无统计学意义(P=0.275),见图 2

    图  2  qRT-PCR法检测各组细胞YKL-40 mRNA表达含量
    Figure  2  Relative expression of YKL-40 mRNA detected by qRT-PCR
    *: P < 0.05, compared with blank control group and mock-treatment group. Bars indicated the mean±standard deviation from each experiment; 1: blank control group; 2: mock-treatment group; 3: experimental group

    MTT实验显示:加入不同浓度梯度的顺铂培养细胞48 h后,细胞的生长受到明显抑制,实验组细胞转染siRNA后比空白对照组和空载体组细胞生长抑制更显著(P < 0.05),但空白对照组和空载体组差异无统计学意义(P > 0.05),见图 3

    图  3  不同浓度顺铂处理后各组细胞生长抑制曲线
    Figure  3  Cell growth inhibition curves after different concentrations of cisplatin treatment
    **: P < 0.01, compared with blank control group and mock-treatment group. We determined that the effects of siRNA on chemosensitivity of EC HEC-1A cells by MTT assay. Cells proliferative ability in the experimental group was significantly inhibited, compared with those in the blank control and the mock-treatment groups when treated with 25μmol/L cisplatin. In this concentration, the chemosensitivity of HCE-1A cells to cisplatin was the highest by silencing YKL-40 gene

    qRT-PCR结果显示:子宫内膜癌细胞中加入相同浓度的顺铂处理48 h后,B组(处理后)细胞的YKL-40基因表达相对含量高于A组(处理前),细胞中YKL-40基因表达上调,差异有统计学意义(P=0.000),见图 4

    图  4  加入顺铂前后子宫内膜癌细胞YKL-40 mRNA的表达含量变化
    Figure  4  Relative expression of YKL-40 mRNA before and after cisplatin treatment detected by qRT-PCR
    **: P < 0.01, compared with group A; A: blank cells; B: the cells treated with cisplatin. Bars indicated the mean±standard deviation from each experiment

    流式细胞实验显示:相同浓度顺铂处理各组细胞后,三组均数经SNK、LSD两两比较,实验组细胞的总凋亡率(38.07±4.88)均明显高于空白对照组(13.3±1.01)(P=0.000)和空载体组(12.5±0.17)(P=0.000),而空白对照组和空载体组比较差异无统计学意义(P=0.776),见图 5

    图  5  流式细胞术检测转染后各组细胞凋亡图
    Figure  5  Apoptosis of each group after transfection detected by FCM
    A: blank control group; B: mock-treatment group; C: experimental group; HEC-1A cells apoptosis rate was increased after the inhibition of YKL-40 expression (P=0.000)

    YKL-40最早被发现于软骨细胞和平滑肌细胞[6],是哺乳动物甲壳质酶蛋白之一,但是缺乏甲壳质酶活性,它由各种细胞产生,包括肿瘤细胞和炎性细胞等[7]。YKL-40在多种恶性肿瘤[8-10]、炎性疾病[11]的组织以及血清中表达增高。在妇科恶性肿瘤如卵巢癌[12]和子宫内膜癌[13]组织和血清中的表达也高于正常组织。血清以及组织中高表达的YKL-40是各种肿瘤发生、发展的独立危险因子[10]

    研究表明,血清以及组织中YKL-40的表达可作为监测子宫内膜癌复发和预后的标志。YKL-40的表达与肿瘤分期相关,与患者的年龄、性别无关[13]。YKL-40在各种恶性肿瘤中具有促进细胞增殖、血管形成以及抗凋亡作用。本实验的前期研究表明[14],应用siRNA抑制YKL-40基因在子宫内膜癌中的表达,子宫内膜癌细胞的增殖和侵袭能力降低,表明YKL-40可能在子宫内膜癌中发挥促进细胞增殖和转移的作用。与胆管癌、前列腺癌、脑胶质瘤等体外肿瘤细胞中的研究结果一致[15-17]。体内动物实验也表明,基因干扰后其成瘤体积小于干扰前[2]。其机制可能与以下几个信号相关:在胆管癌细胞中,YKL-40促进细胞增殖与AKT/ERK通路相关[15];在胶质瘤细胞中,YKL-40促进细胞增殖可能与细胞外调节激酶ERK1/2(extracellular regulated kinase 1/2)通路相关[18];在卵巢癌的研究中可通过诱导Mcl-1抗凋亡基因,抑制卵巢癌细胞的凋亡[5];还有研究表明,YKL-40参与肿瘤细胞耐药机制可能与信号转导和转录激活因子3(STAT3)信号通路相关[19]。以上说明YKL-40在子宫内膜癌增殖和凋亡中发挥重要作用。

    本研究通过制备特异性YKL-40 siRNA慢病毒重组载体,转染到子宫内膜癌细胞中,可有效抑制YKL-40基因表达,有效地阻断YKL-40的活性。相同浓度的顺铂处理子宫内膜癌细胞,子宫内膜癌细胞中YKL-40基因的表达水平增加,提示在外界不良刺激条件下,YKL-40可能与子宫内膜癌增殖和凋亡相关。与van Linde[20]的研究一致,用ELISA的方法检测化疗后肿瘤患者血清中YKL-40的表达增高(P=0.0002)。且耐药性上皮性卵巢癌中YKL-40的水平高于化疗敏感的上皮性卵巢癌,YKL-40也是卵巢癌新辅助化疗的监测指标[21]。但是在Xu等[22]研究中,化疗后患者血清YKL-40的表达水平反而降低。在一项乳腺癌的研究中描述了新辅助化疗前后血清中YKL-40的表达情况:化疗敏感组化疗后YKL-40的水平降低;而化疗不敏感组化疗后YKL-40的水平较化疗前增高[23]。化疗后肿瘤患者YKL-40的表达水平可能是肿瘤对化疗病理反应,可能与肿瘤患者的预后密切相关。由此看出,在外界不良刺激下(比如化疗药物),YKL-40的表达增高可能是应激性增加,YKL-40也可能是一种抗凋亡因子,是一种化疗预后的监测指标。

    化疗前高表达的YKL-40是肿瘤化疗的独立预后因子[24]。YKL-40与耐药肿瘤细胞株的化疗敏感度密切相关,降低耐药细胞株中YKL-40的含量可提高肿瘤化疗药物的敏感度[19]。同时,卵巢癌患者血清中高表达的YKL-40增加了其二线化疗药物耐受的风险[25]。然而在一项非小细胞肺癌的研究中却表明,化疗前YKL-40的水平与化疗敏感度无关[26],化疗前后YKL-40的中位水平差异无统计学意义(P=0.62)。本研究表明,YKL-40 siRNA可增加子宫内膜癌细胞的化疗敏感度。用流式细胞仪测定发现,实验组细胞的凋亡率明显高于对照组,可能提示YKL-40与子宫内膜癌铂类药物耐药有关,抑制子宫内膜癌细胞YKL-40基因后,子宫内膜癌对铂类药物的敏感度增加,说明YKL-40可能是子宫内膜癌细胞铂类耐药的一种病理反应产物,其在子宫内膜癌细胞增殖和抗凋亡中具有重要作用。同时提示,子宫内膜癌细胞对化疗药物的耐药性可能与YKL-40水平相关。化疗前血清中YKL-40水平增高,则对化疗的敏感度低、预后差[22]。但YKL-40参与肿瘤耐药以及化疗敏感度的机制尚不明确。Boisen等[27]对卵巢癌的研究表明,YKL-40可能作为肿瘤化疗预后的评估指标。在胶质瘤细胞的研究也获得类似的结果,通过沉默YKL-40基因,在癌细胞的迁移能力明显降低的同时对铂类化疗药物的敏感度增加[17]YKL-40基因沉默能使卵巢癌细胞总体凋亡率增加,表明其在卵巢癌细胞中可能起到抗凋亡的作用[5]。癌细胞的研究中[16, 19, 28-29],体外通过特异性siRNA片段沉默YKL-40基因也可有效抑制增殖能力。

    本文从体外细胞实验验证了通过YKL-40基因沉默可提高子宫内膜癌细胞对铂类化疗药物的敏感度,且YKL-40基因具有抗凋亡作用。研究结果为子宫内膜癌的临床化疗效果提供了新的思路,表明YKL-40可能作为子宫内膜癌治疗的潜在靶点进行更加深入的研究。

    作者贡献
    陶芳:文章撰写、资料采集、随访及统计学分析
    王国文、马育林:文章审校
    韩秀鑫:资料采集
    张超:资料随访
    李丽丽:统计学分析
  • 图  1   95例滑膜肉瘤患者总生存分析

    Figure  1   Kaplan-Meier overall survival (OS) curve of 95 synovial sarcoma patients

    图  2   滑膜肉瘤患者辅助治疗时机生存分析

    Figure  2   Kaplan-Meier OS curves of synovial sarcoma patients according to time of adjuvant therapy

    图  3   滑膜肉瘤患者不同化疗周期数的生存分析

    Figure  3   Kaplan-Meier OS curves of synovial sarcoma patients according to courses of chemotherapy

    表  1   AI和MAID两种化疗方案基本用法

    Table  1   Information of AI and MAID chemotherapy regimens

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    表  2   生存预后相关的单因素和多因素分析

    Table  2   Prognostic factors in univariate and multivariate analyses

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    表  3   滑膜肉瘤患者化疗单因素分析结果

    Table  3   Univariate analysis of chemotheray outcomes of synovial sarcoma patients

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出版历程
  • 收稿日期:  2018-09-27
  • 修回日期:  2019-03-07
  • 网络出版日期:  2024-01-12
  • 刊出日期:  2019-06-24

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