CN109682974A - 一种胰腺癌检测试剂及其在胰腺癌检测中的应用 - Google Patents

一种胰腺癌检测试剂及其在胰腺癌检测中的应用 Download PDF

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CN109682974A
CN109682974A CN201910038792.4A CN201910038792A CN109682974A CN 109682974 A CN109682974 A CN 109682974A CN 201910038792 A CN201910038792 A CN 201910038792A CN 109682974 A CN109682974 A CN 109682974A
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cancer
pancreas
pdacs
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陈萃英
谈宗男
朱宏章
杨昕
高文涛
苗毅
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Jiangsu first star Biological Technology Co., Ltd.
Xiansida (Nanjing) Biotechnology Co., Ltd.
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Changzhou Ji Tai Biotechnology Co Ltd
Pioneer Star (nanjing) Biological Technology Co Ltd
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Abstract

本发明提供了一种胰腺癌检测试剂,包括PDACS 1:在10mM的NH4HCO3中配制成不高于5.0%SDS,pH为7.5‑8.0的NH4HCO3溶液;PDACS 2:2~5U/µL的PNGaseF、1~2mU/µL唾液酸酶和双氧水按照体积1:1:13混合;PDACS 3:混合同体积的20mM的APTS和1M的NaCNBH3;PDACS 4:缓冲液。本发明还提供一种组合物在胰腺癌检测试剂中的应用,所述组合物由NGA2F和NG1A2F组成,所述组合物通过NGA2F/NG1A2F的比值来检测胰腺癌。本发明采用灵敏度高、操作简单、仅需微量样品、重复性高、稳定性好和高通量的检测方法,与现有技术相比,准确度达到86.3%,明显优于现有的检测方法。

Description

一种胰腺癌检测试剂及其在胰腺癌检测中的应用
技术领域
本发明属于生物医药技术领域,具体涉及一种胰腺癌的检测试剂及其在胰腺癌检测中的应用。
背景技术
胰腺癌是一种恶性程度很高,诊断和治疗都很困难的消化道恶性肿瘤,约90%为起源于腺管上皮的导管腺癌。5年生存率<5%,是预后最差的恶性肿瘤之一。胰腺癌早期的确诊率不高,手术死亡率较高,而治愈率很低。胰腺癌发病呈快速上升趋势。中国国家癌症中心最新统计数据显示,胰腺癌位列中国城市男性恶性肿瘤发病率的第8位,居大城市(北京、上海)人群恶性肿瘤死亡率的第5位。胰腺癌起病隐匿,早期症状不典型,常表现为上腹部不适、腰背部痛、消化不良或腹泻等,易与其他消化系统疾病相混淆,出现症状时大多已属中晚期。
胰腺癌的病理分型是以组织形态结构和细胞生物学特性为基础,不同类型的胰腺癌,其形态结构和生物学行为各异,流行病学和分子机制亦不同,以致于现有的胰腺癌病理分型系统众多。在所有类型的胰腺癌中,胰腺导管腺癌(PDAC)是最为常见的,占85-90%,而患者总体的5年生存率低于5%,这一数字在近50年来都没有改善。其它各类胰腺肿瘤约占胰腺肿瘤的10% - 15%。由于胰腺癌早期转移、生长迅速且位置较深,症状及体征均缺乏典型性,临床上容易漏诊或误诊。目前出现的胰腺癌诊断试剂盒都是检测一些常见的肿瘤标记物,如C19-9、癌胚抗原CEA等,灵敏性及准确性都偏低。单项检测往往有很大的局限性,难以满足快速诊断的要求。所以,本发明专利是应用糖组学方法鉴别诊断胰腺癌及各型胰腺肿瘤,提供一种非侵入性、高灵敏度、高特异度有利于早期诊断胰腺癌的方法。
发明内容
糖基化是指N-寡聚糖能通过上百种酶、转录因子、离子通道和蛋白之间复杂的相互作用而形成的,且参与多种分子过程,如蛋白折叠、细胞粘附、分子转移、信号转导、调节受体活性等;糖蛋白上的N-寡糖链的改变与疾病相关。
通过前期大量研究发现,在胰腺癌患者血清中,N-寡聚糖NGA2F(agalactosylated, core-a-1,6-fucosylated biantennary glycan),NG1A2F(monogalactosylated ,core – a – 1 , 6 - fucosylated biantennary)相对含量与正常血清中相比,发生了明显变化,因此可作为检测胰腺癌的标志物。
针对现有的胰腺癌检测中,血液检测和影像学检测特异性和准确度不高,病理检查有创伤性,抽样误差性,患者依存性差的问题,本发明提供一种胰腺癌的N-寡糖链检测检测方法。
本发明的技术方案如下:
一种胰腺癌检测试剂,包括PDACS 1:在10mM的NH4HCO3中配制成不高于5.0% SDS,pH为7.5-8.0的NH4HCO3溶液;PDACS 2:2~5U/µL的PNGaseF、1~2mU/µL唾液酸酶和双氧水按照体积1:1:13混合;PDACS 3:混合同体积的20mM的APTS和1M的NaCNBH3;PDACS 4:缓冲液。
所述PDACS1的体积为2µL,PDACS2的体积为2µL,PDACS3体积为2µL,PDACS4体积为200µL。
本发明还提供一种组合物在胰腺癌检测试剂中的应用,所述组合物由NGA2F和NG1A2F组成,NG1A2F由同分异构体NG1A2F1和NG1A2F2组成,所述组合物通过NGA2F/NG1A2F的比值来检测胰腺癌。
试剂制备:
PDACS1:于10mM的NH4HCO3,配制成含有不高于5% SDS、pH为7.5~8.0的NH4HCO3溶液。
PDACS 2:浓度2~5U/µL的PNGaseF,浓度1~2mU/µL唾液酸酶以及双氧水按照体积1:1:13混合。
PDACS 3:混合同体积的20mM APTS和1M NaCNBH3
PDACS 4:缓冲液。
N-寡糖链检测:
①N-寡糖链的制备:取在95℃下灭活的血清2µL,加入2µL PDACS1,
混匀放置5min,加入PDACS2试剂2µL,37~40℃反应3h后进行干燥。
②N-寡糖链的标记:在干燥后的样品中加入2µL的试剂PDACS3,不低
于60℃下进行荧光标记3h后,加入200µL的缓冲液终止反应。
③N-寡糖链分离分析:取上述反应后的液体样品10µL,在ABI3500dx
仪器下进行N-寡糖链分离,从而得到N-糖组图谱。
④数据处理分析:将所得到的N-糖组图谱进行峰值量化,用每个峰的
峰高值与所有峰的高度的总和相比,从而定量计算出每个峰的相对含量,继通过函数NGA2F/NG1A2F进行进一步的统计学分析,来检测胰腺癌。
本发明的有益效果:
(1)本发明的检测方法采用灵敏度高、操作简单、仅需微量样品、重复性高、稳定性好和高通量的检测方法,根据490例样本(胰腺癌样本50例,非胰腺癌样本440例)建立的血清的N-糖组图谱,得到胰腺癌样本血清中的聚糖NGA2F和NG1A2F相对含量,通过函数NGA2F/NG1A2F对受试者进行检测。本发明的检测方法,与现有技术相比,准确度达到86.3%,明显优于现有的检测方法。
(2)采用本发明的试剂,能够让众多高风险的人群接受常规、无创检测,帮助医生及患者及时监测胰腺癌的发生和病情进展,有望在临床中推广使用。
附图说明
图1为胰腺癌的N-寡糖链图谱;
图2为健康对照组血清样本的N-寡糖链图谱;
图3 为检测样本通过函数NGA2F/NG1A2F用于鉴别胰腺癌的ROC曲线;检测样本总数为490例,其中胰腺癌血清样本50例,健康对照组样本440例;得到曲线下面积AUC=0.863。
具体实施方式
下面结合具体实施例以及附图对本试剂进一步详述。需要说明的是,下列实施例仅用于说明而不用于限制本发明的范围。以下实施例中未注明具体条件的实验方法,通常按照常规条件试验,或按照制造厂商建议的条件,试剂都为实验室专用。
实例一:
(1)实验设备:
ABI3500dx 分析仪(Applied Biosystems),PCR,离心机
(2)试剂制备:
PDACS1:于10mM的NH4HCO3,配制成含有不高于5% SDS、pH为7.5~8.0的NH4HCO3溶液。
PDACS 2:浓度2~5U/µL的PNGaseF,浓度1~2mU/µL唾液酸酶以及双氧水按照体积1:1:13混合。
PDACS 3:混合同体积的20mM APTS和1M NaCNBH3
PDACS 4:缓冲液。
(3)N-寡糖链检测
a、N-寡糖链的制备:取在95℃下灭活的血清2µL,加入2µL PDACS1,混匀放置5min,加入PDACS2试剂2µL,37~40℃反应3h后进行干燥。
b、N-寡糖链的标记:在干燥后的样品中加入2µL的试剂PDACS3,不低于60℃下进行荧光标记3h后,加入200µL的缓冲液终止反应。
c、N-寡糖链分离分析:取上述反应后的液体样品10µL,在ABI3500dx仪器下进行N-寡糖链分离,从而得到N-糖组图谱。
d、数据处理分析:将所得到的N-糖组图谱进行峰值量化,用每个峰的峰高值与所有峰的高度的总和相比,从而定量计算出每个峰的相对含量,继通过函数NGA2F/NG1A2F进行进一步的统计学分析,来检测胰腺癌。
检测样本通过函数NGA2F/NG1A2F用于鉴别胰腺癌的ROC曲线;检测样本总数为490例,其中胰腺癌血清样本50例,健康对照组样本440例;得到曲线下面积AUC=0.863。
本发明的检测方法,与现有技术相比,准确度达到86.3%,明显优于现有的检测方法。采用本发明的试剂,能够让众多高风险的人群接受常规、无创检测,帮助医生及患者及时监测胰腺癌的发生和病情进展,有望在临床中推广使用。
以上结合附图所述的具体实施例,对本发明的目的、技术方案和有益效果进行了进一步详细说明,所应理解的是,以上所述仅为本发明的具体实施例而已,但并非对本发明保护范围的限制,所属领域技术人员应该明白,凡在本发明的精神和原则之内,不需要付出创造性劳动即可做出的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。

Claims (3)

1.一种胰腺癌检测试剂,其特征在于:包括PDACS 1:在10mM的NH4HCO3中配制成不高于5.0% SDS,pH为7.5-8.0的NH4HCO3溶液;PDACS 2:2~5U/µL的PNGaseF、1~2mU/µL唾液酸酶和双氧水按照体积1:1:13混合;PDACS 3:混合同体积的20mM的APTS和1M的NaCNBH3;PDACS 4:缓冲液。
2.根据权利要求1所述的胰腺癌检测试剂,其特征在于:所述PDACS1的体积为2µL,PDACS2的体积为2µL,PDACS3体积为2µL,PDACS4体积为200µL。
3.一种组合物在胰腺癌检测试剂中的应用,所述组合物由NGA2F和NG1A2F组成,所述组合物通过NGA2F/NG1A2F的比值来检测胰腺癌。
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WO2023040911A1 (zh) * 2021-09-15 2023-03-23 江苏先思达生物科技有限公司 一种肠癌检测试剂及其在肠癌检测中的应用

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