CN111041093B - 检测卷曲螺旋结构域蛋白127表达水平的试剂的应用和试剂盒 - Google Patents

检测卷曲螺旋结构域蛋白127表达水平的试剂的应用和试剂盒 Download PDF

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CN111041093B
CN111041093B CN201910615529.7A CN201910615529A CN111041093B CN 111041093 B CN111041093 B CN 111041093B CN 201910615529 A CN201910615529 A CN 201910615529A CN 111041093 B CN111041093 B CN 111041093B
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张虎
郝玲
吴隽松
胡明
李春明
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Abstract

本发明属于生物技术领域,涉及检测卷曲螺旋结构域蛋白127表达水平的试剂的应用和试剂盒。更具体地,涉及检测CCDC127表达水平的试剂在制备用于乳腺癌辅助诊断和/或乳腺癌患者预后判断的制剂中的应用以及一种用于乳腺癌辅助诊断和/或乳腺癌患者预后判断的试剂盒。临床样本检测结果显示,乳腺癌中CCDC127表达较癌旁组织显著升高;且CCDC127高表达不利于乳腺癌患者总体生存。因此,检测该基因表达变化的试剂可用于乳腺癌预后或者诊断、治疗。

Description

检测卷曲螺旋结构域蛋白127表达水平的试剂的应用和试 剂盒
技术领域
本发明属于生物技术领域,更具体地,涉及检测卷曲螺旋结构域蛋白127(CCDC127)表达水平的试剂在制备用于乳腺癌辅助诊断和/或乳腺癌患者预后判断的制剂中的应用以及一种用于乳腺癌辅助诊断和/或乳腺癌患者预后判断的试剂盒。
背景技术
2015年,世界卫生组织(the World Health Organization,WHO)的统计数据显示,癌症是引起人类过早死亡的主要疾病。2018年预测数据表明,乳腺癌将成为全球女性最常见癌症之一,位于女性恶性癌症发病率首位。根据中国2014年的统计数据,在279000例乳腺癌患者中,死亡病例近66000例。因此,乳腺癌是严重威胁女性健康的重要疾病。乳腺肿瘤的异质性产生是恶性转变一个重要标志,可以分为肿瘤间异质性和肿瘤内异质性。肿瘤间异质性是由不同乳腺肿瘤产生的,肿瘤内异质性是由某一个乳腺肿瘤内异质性细胞群体产生的。肿瘤内异质性是乳腺癌个性化给药和有效治疗发展的主要障碍。肿瘤异质性的临床意义很早就得到了广泛认可,乳腺癌是人们最早认识的实体瘤之一,人们通过分析雌激素受体的表达认识到癌症异质性细胞表型的临床和治疗意义。随着分子生物学和基因组技术的迅速发展,肿瘤内异质性在功能水平、细胞水平和基因组水平得到关注。
因此,临床上迫切需要开发新的乳腺癌治疗和预后标志物。
发明内容
本发明的目的是提供一种新的乳腺癌预后标志物卷曲螺旋结构域蛋白127(CCDC127),由此进一步提供检测CCDC127表达水平的试剂在制备用于乳腺癌辅助诊断和/或乳腺癌患者预后判断的制剂中的应用以及一种用于乳腺癌辅助诊断和/或乳腺癌患者预后判断的试剂盒。
CCDC127,是一种蛋白编码基因,定位于5p15.33,包含3个外显子,Gene ID:133957,其编码蛋白质主要定位于细胞质和细胞核。目前,有关CCDC127基因在乳腺癌发生发展中的作用未见报道。本发明的发明人通过癌症和肿瘤基因图谱(Cancer GenomeAtlas,TCGA)高通量数据挖掘发现CCDC127高表达不利于乳腺癌患者预后,并通过收集临床乳腺癌患者样本和随访信息,进一步验证CCDC127表达差异对乳腺癌患者的预后作用。
为了实现上述目的,本发明的第一方面提供检测卷曲螺旋结构域蛋白127(CCDC127)表达水平的试剂在制备用于乳腺癌辅助诊断和/或乳腺癌患者预后判断的制剂中的应用。
进一步地,所述检测CCDC127表达水平包括检测CCDC127的基因表达水平和/或检测CCDC127的蛋白表达水平。
更具体地,所述检测CCDC127表达水平的方法包括:通过RT-qPCR方法检测乳腺癌和癌旁组织中CCDC127的表达量;通过分子探针技术检测乳腺癌和癌旁组织中CCDC127mRNA表达量;通过免疫组化或Western-Blot检测乳腺癌和癌旁组织中CCDC127蛋白表达量。
更具体地,所述检测CCDC127表达水平的试剂为靶向CCDC127编码DNA序列的寡核酸探针、PCR引物,或者为靶向CCDC127的抗体。
根据本发明,优选地,所述检测CCDC127表达水平的试剂为具有SEQ ID NO:1和SEQID NO:2所示核苷酸序列的实时荧光定量PCR特异性引物。
5’-CTGGGATTGGCTGCTTTTCG-3’,SEQ ID NO:1;
5’-GACAGCACGCCGATTTTCTG-3’,SEQ ID NO:2。
本发明的第二方面提供一种用于乳腺癌辅助诊断和/或乳腺癌患者预后判断的试剂盒,该试剂盒包括:检测CCDC127表达水平的试剂。
进一步地,所述检测CCDC127表达水平的试剂为靶向CCDC127编码DNA序列的寡核酸探针、PCR引物,或者为靶向CCDC127的抗体。
具体地,所述检测CCDC127表达水平的试剂为具有SEQ ID NO:1和SEQ ID NO:2所示核苷酸序列的实时荧光定量PCR特异性引物。
根据本发明,所述试剂盒还可以含有其他常规的用于实时荧光定量的试剂,优选地,所述试剂盒还包括以下组分中的至少一种:Trizol、异丙醇、氯仿、无水乙醇、无RNA酶水、随机引物、5×M-MLV缓冲液、dNTPs、RNA酶抑制剂、M-MLV逆转录酶、具有SEQ ID NO:3和SEQ ID NO:4所示核苷酸序列的ACTB实时荧光定量PCR特异性引物。
5’-GGCACCCAGCACAATGAAGA-3’,SEQ ID NO:3;
5’-ACTCCTGCTTGCTGATCCAC-3’,SEQ ID NO:4。
临床样本检测结果显示,乳腺癌中CCDC127表达较癌旁组织显著升高(P<0.001);且CCDC127高表达不利于乳腺癌患者总体生存(P=0.0318)。因此,检测该基因表达变化的试剂可用于乳腺癌预后或者诊断、治疗。
本发明的其它特征和优点将在随后具体实施方式部分予以详细说明。
附图说明
通过结合附图对本发明示例性实施方式进行更详细的描述,本发明的上述以及其它目的、特征和优势将变得更加明显。
图1示出了TCGA高通量数据分析乳腺癌中CCDC127的表达。乳腺癌组织中CCDC127表达显著高于正常组织(P<0.001)。
图2示出了TCGA高通量数据分析CCDC127高表达对乳腺癌患者生存的影响。CCDC127高表达不利于乳腺癌患者总体生存(P=0.0097)。
图3示出了乳腺癌组织中CCDC127的表达。乳腺癌组织中CCDC127表达显著高于癌旁组织(P<0.001)。
图4示出了乳腺癌组织中CCDC127高表达对乳腺癌患者生存的影响。CCDC127高表达不利于乳腺癌患者总体生存(P=0.0318)。
具体实施方式
下面将更详细地描述本发明的优选实施方式。虽然以下描述了本发明的优选实施方式,然而应该理解,可以以各种形式实现本发明而不应被这里阐述的实施方式所限制。实施例中未注明具体条件者,皆按照常规条件或制造商建议的条件进行。所用试剂或仪器未注明生产厂商者,均为可以通过市售购买获得的常规产品。
实施例1
本实施例用于说明TCGA高通量数据分析乳腺癌中CCDC127的表达变化。
1.TCGA高通量数据分析过程:
登录TCGA门户网站UALCAN(http://ualcan.path.uab.edu/index.html)首页,点击“Analysis”,输入基因名称“CCDC127”,选择TCGA dataset“Breast invasivecarcinoma”,检索,点击“Expression”,记录结果。利用GraphPad 12.0软件作图,统计方法为T检验,P<0.05为差异有统计学意义。
2.结果:乳腺癌组织中CCDC127的表达较正常组织显著升高(P<0.001),如图1所示。
实施例2
本实施例用于说明TCGA高通量数据分析CCDC127高表达与乳腺癌预后关系。
1.TCGA高通量数据分析过程:
登录TCGA门户网站cBioPortal(http://www.cbioportal.org/),选择肿瘤数据集“Breast Invasive Carcinoma(TCGA Provisional)”,组学数据选择“mRNA Expression z-Scores(RNA Seq V2RSEM)”,基因输入“CCDC127:EXP>=2”,检索,弹出页面中点击“Survival”,记录结果。Kaplan-Meier法绘制生存曲线,log-rank检验生存曲线差异,P<0.05为差异有统计学意义。
2.结果:CCDC127高表达不利于乳腺癌患者总体生存(P=0.0187)(图2)。
实施例3
本实施例用于说明制备检测CCDC127表达量的试剂用于制备乳腺癌患者预后的试剂盒(50次反应)。
1.Trizol 50.0ml;
2.异丙醇50.0ml;
3.氯仿50.0ml;
4.无水乙醇50.0ml;
5.无RNA酶水5.0ml
6. 1.0μM随机引物(Random primers)50.0μl;
7. 5×M-MLV缓冲液2.0ml;
8. 10.0mM三磷酸碱基脱氧核苷酸(dNTPs)100.0μl;
9. 40U/μl RNA酶抑制剂50.0μl;
10. 200U/μl M-MLV逆转录酶50.0μl;
11.ABI 2×PCR Mix 2.0ml;
12. 10.0μM CCDC127实时荧光定量PCR特异性引物30.0μl,引物序列见表1;
13. 10.0μM ACTB实时荧光定量PCR特异性引物30.0μl,引物序列见表1。
表1荧光定量RT-PCR引物序列
Figure BDA0002123816370000061
实施例4
本实施例用于说明临床乳腺癌组织样本CCDC127的检测。
1.本项研究在患者知情同意下进行。57例乳腺癌患者临床信息来自患者就诊记录。乳腺癌标本分为两部分:一部分在液氮中立即冻结,保存在-80℃直到进行RNA提取,另一部分则用于组织病理学评估。
2.组织中总RNA提取:本实验在冰浴中进行。取30~50mg组织(新鲜或-70℃及液氮中保存的组织均可)置1.5ml离心管中,加入1ml Trizol充分匀浆,室温静置5min;每管加入200μl氯仿,剧烈混匀30sec,静置15min,4℃12000rpm离心15min;轻轻吸取上层液体400μl至另一新离心管中,加入等体积异丙醇,轻轻颠倒混匀,4℃12000rpm离心10min;弃上清,加入1ml 75%酒精洗涤沉淀物,4℃12000rpm离心10min;尽可能弃掉上清,室温下晾干10min,每管加入10μl无RNA酶水,溶解(65℃促溶10-15min)。测定OD260,计算RNA浓度。
RNA(mg/ml)=40×OD260×稀释倍数(n)/1000
3.反转录:每25μl反转录体系包括100pmol随机引物,2μg总RNA,M-MLV反转录酶1μl,RNase抑制剂0.625μl,dNTPs(10mM)1.25μl,5×M-MLV缓冲液5μl,无RNA酶水补齐至25μl。反应条件为:37℃1h,95℃5min。
4.定量PCR:每20μl反应体系包含2×PCR Mix 10μl,上、下游引物各0.4μl,cDNA 1μl,ddH2O 8.2μl。反应条件为:94℃2min,94℃15s,60℃40s,40个循环。
5.2-ΔΔCT法计算CCDC127相对表达量:本实验检测57例乳腺癌组织和18例癌旁组织中CCDC127的相对表达量变化。ACTB作为内参基因,将qPCR测得的靶基因CCDC127CT值与同组织来源的内参基因ACTB的CT值相减得到ΔCT,再将ΔCT与对照组ΔCT相减得到ΔΔCT(取癌旁样本ΔCT的平均值为ΔCT对照),利用Excell表格中Power函数计算每组CCDC127相对表达量。利用软件GraphPad Prism 6.0绘图,T检验分析乳腺癌和癌旁CCDC127表达差异,P<0.05为差异具有统计学意义。
6.CCDC127高表达与乳腺癌患者预后:患者随访时间为1-32个月,成功接受随访患者数为57例。CCDC127相对表达量高于癌旁组织相对表达量均数2倍的为高表达,共9例,其他为CCDC127低表达,共48例。Kaplan-Meier法绘制生存曲线,log-rank检验生存曲线差异,P<0.05为差异有统计学意义。
7.结果:
临床样本检测结果显示,乳腺癌中CCDC127表达较癌旁组织显著升高(P<0.001),如图3所示;且CCDC127高表达不利于乳腺癌患者总体生存(P=0.0318),如图4所示。
以上已经描述了本发明的各实施例,上述说明是示例性的,并非穷尽性的,并且也不限于所披露的各实施例。在不偏离所说明的各实施例的范围和精神的情况下,对于本技术领域的普通技术人员来说许多修改和变更都是显而易见的。
序列表
<110> 江苏医药职业学院
<120> 检测卷曲螺旋结构域蛋白127表达水平的试剂的应用和试剂盒
<130> BJI1900772JSYY
<160> 4
<170> SIPOSequenceListing 1.0
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<212> DNA
<213> 人工序列(Artificial Sequence)
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<212> DNA
<213> 人工序列(Artificial Sequence)
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<213> 人工序列(Artificial Sequence)
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actcctgctt gctgatccac 20

Claims (5)

1.检测CCDC127表达水平的试剂在制备用于乳腺癌辅助诊断和/或乳腺癌患者预后判断的制剂中的应用。
2.根据权利要求1所述的应用,其中,所述检测CCDC127表达水平包括检测CCDC127的基因表达水平和/或检测CCDC127的蛋白表达水平。
3.根据权利要求1所述的应用,其中,所述检测CCDC127表达水平的方法包括:通过RT-qPCR方法检测乳腺癌和癌旁组织中CCDC127的表达量;通过分子探针技术检测乳腺癌和癌旁组织中CCDC127 mRNA表达量;通过免疫组化或Western-Blot检测乳腺癌和癌旁组织中CCDC127蛋白表达量。
4.根据权利要求1所述的应用,其中,所述检测CCDC127表达水平的试剂为靶向CCDC127编码DNA序列的寡核酸探针、PCR引物,或者为靶向CCDC127的抗体。
5.根据权利要求4所述的应用,其中,所述检测CCDC127表达水平的试剂为SEQ ID NO:1和SEQ ID NO:2所示核苷酸序列的实时荧光定量PCR特异性引物。
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