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消化系统肿瘤患者奥沙利铂相关血小板下降的临床分析

戴宇翃, 谭茜敏, 李一鸣, 黄婷婷, 邱红, 邱萍

戴宇翃, 谭茜敏, 李一鸣, 黄婷婷, 邱红, 邱萍. 消化系统肿瘤患者奥沙利铂相关血小板下降的临床分析[J]. 肿瘤防治研究, 2021, 48(5): 497-502. DOI: 10.3971/j.issn.1000-8578.2021.20.1260
引用本文: 戴宇翃, 谭茜敏, 李一鸣, 黄婷婷, 邱红, 邱萍. 消化系统肿瘤患者奥沙利铂相关血小板下降的临床分析[J]. 肿瘤防治研究, 2021, 48(5): 497-502. DOI: 10.3971/j.issn.1000-8578.2021.20.1260
DAI Yuhong, TAN Ximin, LI Yiming, HUANG Tingting, QIU Hong, QIU Ping. Clinical Analysis of Oxaliplatin-related Thrombocytopenia in Patients with Digestive System Malignancy[J]. Cancer Research on Prevention and Treatment, 2021, 48(5): 497-502. DOI: 10.3971/j.issn.1000-8578.2021.20.1260
Citation: DAI Yuhong, TAN Ximin, LI Yiming, HUANG Tingting, QIU Hong, QIU Ping. Clinical Analysis of Oxaliplatin-related Thrombocytopenia in Patients with Digestive System Malignancy[J]. Cancer Research on Prevention and Treatment, 2021, 48(5): 497-502. DOI: 10.3971/j.issn.1000-8578.2021.20.1260

消化系统肿瘤患者奥沙利铂相关血小板下降的临床分析

基金项目: 

国家自然科学基金面上项目 81372664

华中科技大学双一流自主创新学科医师资助项目 3011540024

华中科技大学双一流自主创新学科医师资助项目 5001540074

华中科技大学双一流自主创新学科医师资助项目 5001540095

武汉市中青年医学骨干人才培养工程 2016whzqnyxggrcl

详细信息
    作者简介:

    戴宇翃(1985-),女,硕士,主治医师,主要从事消化系统恶性肿瘤的诊疗及恶性肿瘤的姑息治疗

    通信作者:

    邱萍(1986-),女,硕士,副主任医师,主要从事胸部恶性肿瘤的综合治疗及晚期恶性肿瘤姑息治疗,E-mail: 2904431997@qq.com

  • 中图分类号: R730.7

Clinical Analysis of Oxaliplatin-related Thrombocytopenia in Patients with Digestive System Malignancy

Funding: 

National Natural Science Foundation of China 81372664

Double Top Independent Innovation Physician Funded Projects of Huazhong University of Science and Technology 3011540024

Double Top Independent Innovation Physician Funded Projects of Huazhong University of Science and Technology 5001540074

Double Top Independent Innovation Physician Funded Projects of Huazhong University of Science and Technology 5001540095

Wuhan Young and Middle-age Medical Backbone Training Project 2016whzqnyxggrcl

More Information
  • 摘要:
    目的 

    探讨消化系统恶性肿瘤患者在接受含奥沙利铂方案化疗后血小板计数及脾脏直径的变化趋势,及其相关性。

    方法 

    回顾性分析72例消化系统肿瘤患者临床资料,测量及分析患者治疗期间及治疗后血小板数值及脾脏直径的变化。

    结果 

    全组72例患者各级血小板下降发生率为65.3%。化疗开始后血小板下降的中位发生时间为2.53±0.49月,中位奥沙利铂累积剂量为520±35.81 mg/m2;化疗开始后血小板最低值出现的中位时间为4.03±0.49月,中位奥沙利铂累积剂量为780±36.32 mg/m2。共有52例(72.2%)患者出现不同程度的脾脏增大;中位增大比例为(18.82±0.01)%。化疗开始后开始出现脾脏增大的中位时间为2.15±0.19月,脾脏直径最大的中位时间为4.68±2.89月,化疗结束后脾脏开始缩小的中位时间为3.28±0.44月,化疗结束后脾脏恢复的中位时间为8.80±1.05月。

    结论 

    含奥沙利铂方案的化疗可引起血小板下降、脾脏肿大,并且在化疗结束后较长时间难以恢复到基线水平。脾脏径线增加与脾肿大和血小板下降具有显著相关性。

     

    Abstract:
    Objective 

    To investigate the changing trend and correlation of platelet count and spleen diameter in patients with digestive system malignancy receiving oxaliplatin-based chemotherapy.

    Methods 

    We retrospectively analyzed clinical data of 72 patients with digestive system cancer, recorded and analyzed platelet count and spleen diameter during and after oxaliplatin-based chemotherapy.

    Results 

    The incidence of thrombocytopenia in all patients was 65.3%. The median time of thrombocytopenia after the beginning of chemotherapy was 2.53±0.49 months, and the median cumulative dose of oxaliplatin was 520±35.81 mg/m2; the median time of lowest platelet count after the beginning of chemotherapy was 4.03±0.49 months, and the median cumulative dose of oxaliplatin was 780±36.32 mg/m2. Splenomegaly occurred in 52(72.2%) patients during the follow-up. The median increase rate was (18.82±0.01)%. The median time of splenomegaly after the beginning of chemotherapy was 2.15±0.19 months, the median time for the largest spleen diameter was 4.68±2.89 months; after the end of chemotherapy, the median time for spleen contraction was 3.28±0.44 months, and the median time for spleen recovery was 8.80±1.05 months.

    Conclusion 

    Oxaliplatin-based chemotherapy can cause thrombocytopenia and splenomegaly, and it is difficult to recover to baseline for a long time after the end of chemotherapy. The increase of spleen diameter was positively correlated with splenomegaly and thrombocytosis.

     

  • 卵巢癌是一个突出的公共卫生问题,尽管其发病率在女性生殖系统恶性肿瘤中低于宫颈癌及子宫内膜癌,但死亡率占据妇科恶性肿瘤之首[1]。根据世界卫生组织的统计,每年新增病例约225 500例,卵巢癌死亡的病例约140 200例左右[2]。1980年以来,卵巢癌的5年总生存率仍低于30%,未见明显改善[3]。因此探讨卵巢癌的发病机制,寻找新的治疗策略,成为女性健康领域的重大诉求。

    乳脂肪球表皮生长因子8(milk fat globule-EGF factor 8, MFG-E8),又称为乳凝集素,是一种分泌型糖蛋白,由MFG-E8基因编码[4],其在许多生理和病理过程中发挥重要作用,如吞噬作用、动脉粥样硬化的发病机制、血管生成、免疫保护以及其他[5-8]。已有研究证实MFG-E8在多种肿瘤中高表达,并可促进肿瘤细胞的增殖和侵袭等[9-13],但MFG-E8在卵巢癌中的研究较少[14]。前期实验中,我们已经证实沉默MFG-E8可抑制上皮性卵巢癌细胞增殖、影响细胞周期分布、迁移、黏附、侵袭等生物学特性,并对其相关机制进行了探讨。有研究显示在肿瘤干细胞标记阳性的黑素瘤、乳腺癌以及非小细胞肺癌细胞株中证实MFG-E8可激活Stat3和Sonic Hedgehog信号途径,与IL-6协同增强其抗癌药耐药性[15],但其对于卵巢癌细胞化疗抵抗的影响尚不明确。本研究通过探讨沉默MFG-E8基因对卵巢癌SKOV3细胞顺铂药物敏感度的影响及其相关作用机制,为上皮性卵巢癌靶向治疗提供新思路。

    SKOV3细胞购自中科院上海细胞库。引物由上海生工合成,MFG-E8 siRNA及NC siRNA由江苏吉玛生物公司构建并合成。RPMI 1640培养基、胎牛血清均购自美国Gibco公司、细胞培养瓶和多孔培养板均购自美国Corning公司、CCK-8增殖试剂盒购自美国MCE公司、E-cadherin兔抗人单克隆抗体、N-cadherin兔抗人单克隆抗体、Vimentin兔抗人单克隆抗体、Snail+Slug兔抗人多克隆抗体以及GAPDH兔抗人单克隆抗体均购自美国Abcam公司、蛋白酶抑制剂、BCA检测试剂盒、ECL化学发光检测试剂盒均购自武汉塞维尔公司。Lipofectamine™2000购自美国Invitrogen公司、反转录聚合酶链反应(RT-PCR)试剂盒购于日本TaKaRa公司、顺铂购自山东齐鲁药业有限公司(H20073653)。

    SKOV3细胞用含10%胎牛血清的RPMI1640培养基中,在37℃、5%CO2饱和湿度条件下常规培养,1~2天换液一次。

    MFG-E8 siRNA以及阴性对照siRNA(NC siRNA)序列如下:MFG-E8 siRNA#1:正义(5’-3’)GAUUUCCCAAGAAGUGCGATT,反义(5’-3’)UCGCACUUCUUGGGAAAUCTT;MFG-E8 siRNA#2:正义(5’-3’)GGACACGAAUU-CGAUUUCATT,反义(5’-3’)UGAAAUCGAAUUCGUGUCCTT;MFG-E8 siRNA#3:正义(5’-3’)GGCCUGAAGAAUAACAGCATT,反义(5’-3’)UGCUGUUAUUCUUCAGGCCTT;NC siRNA:正义(5’-3’)UUCUUCGAACGUGUCACGUTT,反义(5’-3’)ACGUGACACGUUCGGAGAATT。转染前一天,用胰酶消化细胞并计数,将细胞铺入六孔板中,使转染时细胞汇合度达到50%~70%,此时用不含抗生素的培养基进行培养,第二天进行细胞转染。转染步骤参考Lipofectamine™2000的试剂说明进行。步骤如下:(1)分别将2 μg NC siRNA或转染组MFG-E8 siRNA #1、#2、#3、5 μl LipofectamineTM2000溶于250 μl Opti-MEMⅠ培养基中,室温孵育5 min。(2)将上述siRNA与Lipofectamine™2000混合,室温下继续孵育20 min。(3)将500 μl上述混合物分别加入各孔细胞中,轻轻混悬。转染6~8 h后更换含10%血清的完全培养基继续培养至48 h。收集细胞用于后续的研究。

    取对数生长期的SKOV3细胞,常规胰酶消化,离心后用RPIM 1640培养基(含10%胎牛血清)重悬为单细胞悬液,计数板计数后,按每孔1×105个/孔接种于6孔板内,每组设6个复孔,置于5%CO2、37℃的培养箱内培养24 h,第二天用NC siRNA和MFG-E8 siRNA分别转染细胞。于转染后24 h,分别加入使用浓度为0、1.5、3、4.5、6、7.5、9、10.5 μg/ml顺铂作用于各组细胞,继续置于培养箱内培养48 h后,每孔加入CCK-8试剂10 μl,孵育2 h,应用酶标仪于450 nm波长处测定吸光度值(OD),根据以下公式计算细胞相对增殖抑制率。

    相对增殖抑制率(%)=1-[(实验孔OD值-空白孔OD值)/(对照孔OD值-空白孔OD值)]×100%。本研究空白孔为单纯培养基。GraphPad Prism 5.0统计软件计算各组细胞顺铂注射液的IC50,选取适宜的药物浓度进行后续试验。

    取SKOV3细胞单细胞悬液,计数后将1×105个/孔细胞均匀接种于96孔板中。贴壁12 h后,用NC siRNA和MFG-E8 siRNA转染细胞,方法同前,每组设6个复孔。转染后24 h,分别加入顺铂(药物浓度为上述实验中检测顺铂对阴性对照组细胞的IC50值)继续培养。分别在加药24、48和72 h后,每孔加入10 μl CCK-8,继续培养2 h,利用多功能酶标仪测定各个孔在450 nm处的OD值。

    按照TRIzol试剂盒说明书提取细胞总RNA,并对所提取的RNA完整性鉴定和定量,反转录合成cDNA,SYBR®GreenⅠ行Real-time PCR检测,50℃适应2 min,94℃预变性5 min,94℃变性15 s,60℃复性、延伸45 s,循环40次。每次延伸前读板。95℃反应10 min后作溶解曲线分析。以GAPDH作为内参基因,分析目的基因的mRNA相对表达量。

    加入细胞蛋白裂解液提取细胞总蛋白,测定蛋白浓度,SDS-聚丙烯酰氨凝胶电泳,湿转法电转印蛋白质至PVDF膜,将PVDF膜放入5%脱脂牛奶封闭液中,封闭2 h,将膜放置于含有一抗的稀释液中,4℃过夜,加入二抗(1:500)室温孵育2 h,将等体积的化学发光试剂A和B混匀后与PVDF膜共孵育1 min,应用Image Quant LAS 4000凝胶成像系统进行显色,Gelpro4.0软件分析条带灰度值,蛋白相对表达量=待检样品蛋白的灰度值/内参的灰度值。

    所有实验结果均采用均数±标准差(x±s)表示,GraphPad Prism5.0统计软件处理,t检验对数据进行统计分析,P < 0.05为差异有统计学意义。

    分别将NC siRNA及MFG-E8 siRNA转染SKOV3细胞中,于转染后48 h收集细胞检测MFG-E8 siRNA的干扰效率,Vehicle(溶剂组)只加转染试剂LipofectamineTM2000。

    Western blot结果显示,MFG-E8蛋白的表达在MFG-E8 siRNA#3中明显低于MFG-E8 siRNA#1、MFG-E8 siRNA#2以及组Vehicle组和NC siRNA组细胞,其中NC siRNA组相对蛋白量为0.85±0.106,MFG-E8 siRNA组相对蛋白量为0.28±0.079(P=0.0003),见图 1。上述结果表明所用MFG-E8 siRNA#3序列可以有效干扰MFG-E8的表达,阴性序列对MFG-E8蛋白表达无明显影响,因此应用MFG-E8 siRNA#3(Msi)及NC siRNA(Csi)完成后续试验。

    图  1  转染后48 h各组细胞中MFG-E8蛋白的表达
    Figure  1  Expression of MFG-E8 protein in SKOV3 cells after MFG-E8 siRNA transfection for 48h
    Csi: NC siRNA group; Msi: MFG-E8 siRNA group.

    不同浓度的顺铂作用于两组细胞48 h后结果显示,随着药物浓度的增高,两组细胞的增殖抑制率均有上升,MFG-E8 siRNA转染组细胞增殖抑制率上升较明显(P=0.0001),见图 2A。GraphPad Prism 5.0统计软件计算顺铂对两组细胞的IC50,MFG-E8 siRNA转染组(3.308±1.75)明显低于对照组(1.934±0.06),差异有统计学意义(P=0.0002)。

    图  2  CCK-8检测顺铂对两组SKOV3细胞的毒性反应
    Figure  2  Toxicities reaction of cisplatin in two groups of SKOV3 cells detected by CCK-8
    A: cell growth rate was evaluated using CCK-8 assay in SKOV3 cells transfected with MFG-E8 siRNA(Msi) or NC siRNA(Csi), followed by different concentration of Casplatin treatment for 48h respectively; B: cell growth rate was evaluated using CCK-8 assay in SKOV3 cells transfected with MFG-E8 siRNA(Msi) or NC siRNA(Csi), followed by 3μg /ml Casplatin treatment for 24h, 48h and 72h, respectively.

    据所测阴性对照组的IC50,将3 μg/ml顺铂浓度作用于两组细胞,检测不同时间后两组细胞对顺铂的敏感度变化。结果表明,处理48、72 h后,可见MFG-E8 siRNA转染组细胞增殖活性显著低于阴性对照组,见图 2B表 1

    表  1  FG-E8 siRNA转染联合顺铂(3 μg/ml) 对细胞增殖的影响
    Table  1  Influence of MFG-E8 siRNA t ransfection combined with casplatin (3μg/ml) on proliferation of SKOV3 cells
    下载: 导出CSV 
    | 显示表格

    结果显示,与阴性对照组相比,MFG-E8 siRNA转染组中ABCB1及ABCC1 mRNA表达均明显降低,差异有统计学意义(P=0.0059, P=0.0206),见图 3

    图  3  qRT-PCR检测两组细胞中耐药基因ABCB1、ABCC1 mRNA相对表达水平
    Figure  3  ABCB1 and ABCC1 mRNA expression in SKOV3 cells of two groups detected by qRT-PCR

    Csi与Msi组中N-Cadherin mRNA表达量分别为1.01±0.073和0.72±0.086,差异有统计学意义(P=0.002),Snail mRNA表达量分别为1.06±0.072和0.71±0.032,差异有统计学意义(P=0.000);Vimentin mRNA相对表达量分别为1.03±0.181和0.60±0.122,差异有统计学意义(P=0.0469);E-Cadherin mRNA相对表达量分别为0.92±0.087和1.69±0.2371,差异有统计学意义(P=0.001)。说明沉默MFG-E8基因可下调N-Cadherin、Vimentin、Snail mRNA的表达,上调E-Cadherin mRNA表达,见图 4

    图  4  qRT-PCR检测转染MFG-E8 siRNA对SKOV3细胞中EMT的影响
    Figure  4  Effect of MFG-E8 siRNA transfection on EMT in SKOV3 cells detected by qRT-PCR

    Western blot检测结果显示,Csi组与Msi组N-Cadherin蛋白的相对表达量为0.67±0.03和0.47±0.013,差异有统计学意义(P=0.020);snail+slug蛋白相对表达量分别为0.33±0.02和0.12±0.017,差异有统计学意义(P=0.0002);Vimentin蛋白相对表达量分别为0.53±0.081和0.27± 0.062,差异有统计学意义(P=0.0258);E-Cadherin蛋白相对表达量分别为0.27±0.033和0.61±0.034,差异有统计学意义(P=0.0085)。结果表明,沉默MFG-E8可降低SKOV3细胞中N-Cadherin、Vimentin、Snail+Slug蛋白的表达,上调E-Cadherin蛋白表达,见图 5

    图  5  Western blot检测转染MFG-E8 siRNA对SKOV3细胞中EMT相关蛋白表达的影响
    Figure  5  Effect of MFG-E8 siRNA transfection on expression of EMT-related proteins in SKOV3 cells detected by Western blot

    尽管随着治疗技术的进展,手术及联合放化疗等治疗手段广泛应用于临床,但中晚期的上皮性卵巢癌患者病死率仍无明显改善。卵巢癌在女性生殖系统恶性肿瘤中死亡率最高,其恶性进展的特征包括:腹腔内肿瘤细胞的扩散,大量腹水的快速形成,肿瘤血管的形成[16]。认识卵巢癌的发病机制,寻找更有效的治疗方案,是关乎女性健康的一大挑战。

    MFG-E8可从各种类型的细胞中分泌,包括乳腺上皮细胞、巨噬细胞和未成熟的树突细胞,并通过与吞噬细胞上的αVβ3整合素结合来介导凋亡细胞的有效吞噬作用[17-18],已有研究证实MFG-E8可促进肿瘤增殖、侵袭[5, 9]

    化疗是上皮性卵巢癌的主要治疗手段之一,尤其是对中晚期患者来说。本研究进一步检测了MFG-E8 siRNA转染对SKOV3细胞顺铂毒性反应以及联合顺铂处理对细胞增殖的影响。结果显示,随着药物浓度的增高,各组细胞的增殖抑制率上升,MFG-E8 siRNA转染组细胞增殖抑制率上升明显,当顺铂浓度达到7.5 μg/ml以上时,两组细胞OD值趋于接近,参考顺铂对阴性对照组细胞的IC50,设定药物浓度为3 μg/ml作用于两组细胞,测不同的时间点(24、48、72 h)对抗肿瘤药物敏感度的变化。结果显示处理48、72 h后,MFG-E8 siRNA转染组细胞增殖活性显著低于阴性对照联合顺铂处理组细胞。提示MFG-E8参与了卵巢癌耐药的发生过程。

    虽然一线化疗(铂类联合)对大多数卵巢癌患者在初始治疗时疗效显著,但大约70%的晚期卵巢癌患者会在治疗后复发,并最终因化疗耐药而导致死亡。有研究表明,MFG-E8可以促进肿瘤细胞对化疗的耐药性[15],ABCB1(P-gp MDR1)以及ABCC1(MRP1)均属于为ATP结合盒(ATP binding cassette transporters)转运蛋白超家族成员,广泛分布于肿瘤组织内,与多重耐药相关[19]。研究发现,多重耐药分子机制复杂,涉及多个方面,如肿瘤细胞对化疗药物的摄取降低、排出增加、以及机体对药物代谢的改变、DNA损伤修复增强等,但其具体机制尚不明确。ATP结合盒转运蛋白具有“药泵”作用,它可以将化疗药物从肿瘤细胞内泵出,降低细胞内有效药物浓度,从而产生耐药。为进一步了解MFG-E8基因对多重耐药蛋白ABCB1及ABCC1的影响,我们用qRT-PCR检测MFG-E8 siRNA对ABCB1及ABCC1 mRNA表达变化,结果显示,与阴性对照组相比,MFG-E8 siRNA转染组中ABCB1及ABCC1 mRNA表达均明显降低。这表明沉默MFG-E8对顺铂的增敏作用可能是通过降低ABCB1及ABCC1表达产生。

    越来越多的研究表明上皮间充质细胞转化(epithelial mesenchymal transtion, EMT)激活可促进肿瘤组织的侵袭、远处转移及肿瘤耐药[20-21]。EMT是指上皮性细胞失去细胞极性转化为间质细胞的过程,间充质细胞可表现出更高的侵袭性及迁移性等恶性表型[22]。EMT在各种病理过程中同样发挥着重要作用,包括伤口愈合、组织纤维化和癌症进展[20-21]。EMT被分为三型:1型EMT指在胚胎发育阶段上皮细胞转化为运动间充质细胞;2型涉及伤口愈合和组织再生;3型发生在上皮性肿瘤细胞中与肿瘤进展和转移密切相关[23]。EMT的形成体现在上皮性标志物E-cadherin蛋白表达降低,同时伴有N-cadherin、Vimentin、Snail及Slug蛋白表达升高[24]。本研究同时检测沉默MFG-E8基因表达在mRNA水平及蛋白水平对EMT进程的影响,结果显示MFG-E8 siRNA可上调E-cadherin表达,同时抑制N-cadherin、Vimentin、Snail及Slug表达,证实沉默MFG-E8基因可逆转SKOV3细胞中的EMT形成过程。我们的结果与MFG-E8在恶性黑色素瘤及结直肠癌中的作用研究结果一致[5, 25]

    综上,本研究提示在沉默MFG-E8基因可以增加肿瘤细胞对化疗药物的敏感度,并下调多重耐药蛋白ABCB1及ABCC1 mRNA水平的表达,说明MFG-E8与化疗耐药相关,并且沉默MFG-E8可抑制EMT进程。这将为表达MFG-E8的卵巢癌的治疗提供新思路。

    Competing interests: The authors declare that they have no competing interests.
    作者贡献:
    戴宇翃:研究实施、数据分析及论文写作
    谭茜敏、李一鸣、黄婷婷:参与数据收集和结果分析
    邱红:参与研究设计和构思
    邱萍:研究构思及设计、论文写作和修改
  • 图  1   72例患者含奥沙利铂方案化疗结束后血小板恢复时间曲线

    Figure  1   Time curve of platelet count recovery in 72 patients after oxaliplatin-based chemotherapy

    图  2   72例含奥沙利铂方案化疗患者脾脏直径增加趋势

    Figure  2   Increase of spleen diameter in 72 patients received oxaliplatin-based chemotherapy

    图  3   72例含奥沙利铂方案化疗患者脾脏直径变化趋势

    Figure  3   Change of spleen diameter in 72 patients received oxaliplatin-based chemotherapy

    图  4   72例患者含奥沙利铂方案化疗结束后脾脏直径中位恢复时间曲线

    Figure  4   Time curve of spleen diameter recovery in 72 patients after oxaliplatin-based chemotherapy

    图  5   有无脾脏增大患者血小板中位恢复时间

    Figure  5   Time curve of platelet count recovery in patients with or without splenomegaly

    表  1   72例消化系统肿瘤患者的临床资料

    Table  1   Clinical characteristics of 72 patients with digestive system malignancy

    下载: 导出CSV

    表  2   72例患者辅助治疗与一线治疗对比

    Table  2   Adjuvant therapy versus first-line therapy on 72 patients

    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-10-27
  • 修回日期:  2021-01-20
  • 网络出版日期:  2024-01-12
  • 刊出日期:  2021-05-24

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