CN117448445B - Pten、tsc1和tsc2基因在马兜铃酸敏感性检测中的应用 - Google Patents
Pten、tsc1和tsc2基因在马兜铃酸敏感性检测中的应用 Download PDFInfo
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Abstract
本发明属于生物医学技术领域,具体涉及PTEN,TSC1和TSC2基因的在马兜铃酸敏感性检测中的应用。本发明提供AA‑Ⅰ的敏感性基因PTEN,TSC1和TSC2,所述的基因PTEN,TSC1和TSC2的表达量能够有效用于马兜铃酸毒性反应个体化差异的早期监测。PTEN、TSC1、TSC2基因测序FPKM数值小于0.5以下定义为不表达上述基因的个体,以此判断临床个体为AA‑Ⅰ敏感个体,为含马兜铃酸中药的用药安全提供技术支持。
Description
技术领域
本发明属于生物医学技术领域,具体涉及PTEN、TSC1和TSC2基因的在马兜铃酸敏感性检测中的应用。
背景技术
马兜铃酸(Aristolochic acids,AAs)是一类硝基菲类羧酸,具有肾脏毒性和致癌性。在马兜铃酸类化合物中,主要的毒性成分为马兜铃酸Ⅰ(AA-Ⅰ)和马兜铃酸Ⅱ(AA-Ⅱ)。已报道的大量马兜铃酸肾病(AAN)病例中,有些AAN患者后续发生尿路上皮癌和膀胱癌。泌尿系统致癌性的发现使马兜铃酸被列为Ⅰ类致癌物。现在存于2020版药典中的马兜铃科植物仅有细辛一种,细辛临床应用广泛,主要用于治疗过敏性哮喘、鼻炎、咳嗽以及新冠病毒感染等症。除了入汤剂外,大量的中成药制剂中亦含有细辛。申请人前期使用质谱检测了中国药典中收载的含有细辛的中成药中AA-Ⅰ的含量,在人参再造丸、珠贝定喘丸、小青龙汤口服液、通天口服液、儿童清肺口服液、九味羌活颗粒、辛芩颗粒、养血清脑丸颗粒、参芪十一味颗粒、醒脑再造丸胶囊、参三七伤药胶囊中未检测出AA-Ⅰ;鹭鸶咯丸、同仁大活络丸、散风活络丸、十一味参芪片、胃炎宁颗粒、小青龙汤颗粒中的AA-Ⅰ含量在质谱检测限以下;在平肝舒络丸、乌梅丸、风湿安泰片、参三七伤药片、鼻炎灵片、猴枣牛黄散、正天丸、痧气丸、追风透骨片、鼻渊舒口服液、齿痛消炎灵颗粒、镇脑宁胶囊、感特灵胶囊、辛芳鼻炎胶囊、十一味参芪胶囊中检测出AA-Ⅰ含量范围在0.01-0.05μg/g。
药物摄入体内后经肝组织代谢,机体的遗传背景不同、以及是否处于疾病状态会影响机体对药物的代谢,导致机体对药物出现不同的反应,因此筛选药物敏感性基因对临床安全用药至关重要。含马兜铃酸中药在临床应用一直争议较大,AA-Ⅰ长期给药造成肾脏损伤及肾纤维化,而针对AA-Ⅰ是否能诱导肝脏损伤,各个研究团队结果并不一致。临床结果显示马兜铃酸肾病患者具有性别差异性,以女性患者居多。由此推测马兜铃酸毒性可能具有人群易感性,本申请旨在提供马兜铃酸毒性易感基因,为临床安全用药提供科学依据。
PTEN基因突变会导致错构瘤综合征,为常染色体显性遗传病。患者会发生乳腺癌、甲状腺癌、子宫内膜癌和其他癌症。TSC1、TSC2基因突变会导致结节性硬化症,其为一种多器官受累的常染色体显性遗传病,临床诊断指标为大脑皮质结节、室管膜下巨细胞和星形细胞瘤、肾脏的血管肌脂肪瘤、淋巴管性肌瘤病、心脏横纹肌瘤、面部血管纤维瘤、皮肤皮革样病变和白斑。TSC1与TSC2在体内是以复合体形式存在,TSC2敲除后会导致TSC1的降解。
现有技术中尚未公开PTEN、TSC1和TSC2基因在马兜铃酸敏感性检测中的应用。
发明内容
为了解决上述问题,本发明提供了PTEN、TSC1和TSC2可作为马兜铃酸敏感性基因分子标志物,用于马兜铃酸毒性反应个体化差异的早期监测。
一方面,本发明提供了一种用于检测分子标志物的试剂在制备马兜铃酸敏感性检测产品中的应用,所述的分子标志物为PTEN、TSC1或TSC2中的至少一种。
具体地,所述的产品用于检测对马兜铃酸毒性的敏感性。
所述的PTEN、TSC1或TSC2的基因突变会诱导马兜铃酸毒性增强。
进一步具体地,所述的产品用于检测PTEN、TSC1或TSC2的表达量,即PTEN、TSC1或TSC2mRNA和蛋白表达可以诊断马兜铃酸毒性的个体化差异。
更进一步具体地,所述的PTEN、TSC1、TSC2基因测序FPKM数值小于0.5以下判断临床个体为马兜铃酸毒性敏感个体。
具体地,所述的试剂为特异性结合PTEN、TSC1或TSC2的试剂。
优选地,所述的特异性结合PTEN、TSC1或TSC2的试剂可以是PTEN、TSC1或TSC2的抗体。
具体地,所述的试剂为特异性结合PTEN、TSC1或TSC2的核酸的试剂。
具体地,所述的试剂为用于检测PTEN、TSC1或TSC2表达量的试剂。
优选地,所述的试剂为特异性扩增PTEN、TSC1或TSC2基因的引物和特异性识别PTEN、TSC1或TSC2的 mRNA的探针。
具体地,所述的产品包括但不限于:特异性分析PTEN、TSC1或TSC2的芯片或试剂盒。
在一些实施例中,所述的产品为芯片;所述的芯片包括但不限于:固相载体和特异性识别PTEN、TSC1或TSC2的探针。
在一些实施例中,所述的产品为试剂盒;所述试剂盒的包括但不限于:核酸抽提试剂、荧光染料、探针和引物中的一种或多种。
在另一些实施例中,所述的产品为试剂盒;所述的试剂盒为检测PTEN、TSC1或TSC2的ELISA试剂盒;所述试剂盒的包括特异性识别PTEN、TSC1或TSC2的抗体;所述试剂盒的还包括固相载体、标准品、底物、终止液和缓冲液中的一种或多种。
具体地,所述的产品针对的检测组织包括但不限于:血清、肝组织、肾组织、心脏组织、神经组织、皮肤组织、子宫组织、甲状腺组织、乳腺组织、血管或心脏组织。
又一方面,本发明提供了检测马兜铃酸敏感性的方法。
所述的方法中包括:药物喂食小鼠,检测小鼠组织中PTEN、TSC1或TSC2的表达量。
所述的组织包括但不限于:血清、肝组织、肾组织、心脏组织、神经组织、皮肤组织、子宫组织、甲状腺组织、乳腺组织、血管或心脏组织。
本发明所取得的技术效果:PTEN、TSC1或TSC2的基因突变会诱导马兜铃酸毒性增强。PTEN、TSC1或TSC2的基因突变会导致PTEN、TSC1或TSC2mRNA和蛋白质表达水平下降,因此检测PTEN、TSC1或TSC2的mRNA和蛋白表达可以诊断马兜铃酸毒性的个体化差异。
附图说明
图1为AA-Ⅰ处理PTEN缺失细胞及其对照细胞24h后的生存率,野生型对照细胞(WT);PTEN基因缺失细胞(PTEN -/-)。
图2为AA-Ⅰ处理TSC2缺失细胞及其对照细胞24h后的生存率, 野生型对照细胞(WT);TSC2基因缺失细胞(TSC2 -/-)。
图3为AA-Ⅰ处理肝脏PTEN基因缺失小鼠(Alb-PTEN -/-)及其对照鼠(WT)后的体重变化曲线。
图4为AA-Ⅰ处理肝脏PTEN基因缺失小鼠(Alb-PTEN -/-)及其对照鼠(WT)后的血清生化指标变化。
图5为AA-Ⅰ处理肝脏PTEN基因缺失小鼠(Alb-PTEN -/-)及其对照鼠(WT)后肝脏组织病理HE染色切片。
图6为PTEN缺失细胞及其野生型对照细胞蛋白与mRNA检测;其中A为PTEN蛋白表达水平检测结果;B为PTENmRNA检测结果。
图7为TSC2缺失细胞及其野生型对照细胞蛋白与mRNA检测;其中A为TSC1、TSC2蛋白表达水平检测结果;B为TSC1、TSC2的 mRNA检测结果。
图8为正常肝组织与肝癌组织中 PTEN、TSC1、TSC2蛋白表达情况。
图9为正常肝组织PTEN、TSC1、TSC2基因表达情况。
具体实施方式
下面结合具体实施例,对本发明作进一步详细的阐述,下述实施例不用于限制本发明,仅用于说明本发明。以下实施例中所使用的实验方法如无特殊说明,实施例中未注明具体条件的实验方法,通常按照常规条件,下述实施例中所使用的材料、试剂等,如无特殊说明,均可从商业途径得到。
实施例1AA-Ⅰ对PTEN基因缺失细胞敏感
1、试验试剂
AA-I (分子式为:C17H11NO7,分子量为341.27),购自北京赛百草科技有限公司,批号:SH21031903。
CCK,购自北京全式金生物技术有限公司,批号:Q10707。
2、试验材料
小鼠PTEN基缺失成纤维细胞系(PTEN -/-)及其野生型对照细胞系(WT) 由中国医学科学院基础医学研究所张宏冰教授赠予。
3、试验仪器
细胞培养箱:Thermo Forma Steri-cycle;安全柜:YATAIKELONG;酶标仪:TECANSPARK。
4、试验方法
细胞培养96孔板每孔铺104个细胞,AA-I及其溶剂对照加入细胞中,培养24h后,加入CCK试剂,酶标仪选择450nm滤光片,检测细胞活性。
5、试验结果
AA-I药物设置10μM,20μM,40μM,100μM几个浓度梯度,结果显示WT细胞系IC50值为45μM,PTEN -/-细胞细胞系IC50值为19μM。即PTEN基因缺失会导致AA-I对细胞敏感性增强,毒性增强。
实施例2AA-Ⅰ对TSC2基因缺失细胞敏感
试验试剂、仪器与方法如实施例1
1、试验材料
小鼠TSC2基因缺失成纤维细胞系(TSC2 -/-)及其野生型对照细胞系(WT),实验室自建。
2、试验结果
AA-I药物设置10μM,20μM,40μM,100μM几个浓度梯度,结果显示WT细胞系IC50值为45μM,TSC2 -/-细胞细胞系IC50值为19μM。即TSC2基因缺失会导致AA-I对细胞敏感性增强,毒性增强。TSC1与TSC2在体内以复合体的形式存在,TSC2缺失后必然会导致TSC1蛋白降解,故TSC1基因缺失也会导致AA-I对细胞敏感性增强,毒性增强。
实施例3AA-Ⅰ造成PTEN基因缺失小鼠肝脏组织损伤
1、试验试剂
AA-I (分子式为:C17H11NO7,分子量为341.27),购自北京赛百草科技有限公司,批号:SH21031903。
CMC-Na,购自北京索莱宝科技有限公司,批号:1020M021。
2、试验材料
小鼠基因型:肝脏敲除PTEN基因小鼠(Alb-PTEN -/-)及其野生对照鼠(WT),本实验室繁殖。
小鼠品系:C57B6J;性别:雄性;动物周龄:6-8周。
动物要求:无特殊病原菌。
试验期间动物饲养地点:中国中医科学院中药研究所屏障环境动物实验室。饲养条件:屏障系统,温度20-26℃,相对湿度为40-70%,全新风。采取人工光照,12小时明暗周期。动物饲养于聚碳酸酯小鼠饲养笼。饲料:使用标准小鼠颗粒饲料,由北京市科澳协力饲料有限公司提供。饮用水:饮用纯净水,每周更换两次高压灭菌的饮水瓶。
3、试验仪器
动物天平:Sartorius,德国,型号:BSA3202s-CW、BSA224S-CW。
4、试验方法
4.1 随机分组
小鼠分为4组:野生型溶剂对照组(WT),野生型AA-I灌胃给药组(WT+AA-I),肝敲除PTEN溶剂对照组(Alb-PTEN -/-),肝敲除PTENAA-I灌胃给药组(Alb-PTEN -/-+AA-I)。
4.2 研究方法
溶剂对照组小鼠灌胃给予0.5% CMC-Na 7天,AA-I组,灌胃给予AA-I(5mg/kg)7天后。小鼠给药结束后,观察至14天,观察期间记录小鼠体重变化,记录小鼠生存状态。观察期结束后处死小鼠,留取小鼠组织进行后续试验研究。
4.3 胃、肾组织病理检查
留取小鼠血清、肝组织和肾组织,其中肝和肾组织留取2份,一份冻存于-80℃,另一份用10%的中性福尔马林将肺组织固定备用。送检组织经甲醛充分固定后,逐级乙醇脱水,二甲苯透明,石蜡包埋,常规制备3μm石蜡切片。用HE染色,光学显微镜( DP71型,OLYMPUS,放大400倍)检查组织损伤情况。血清用于生化检测。
5、试验结果
试验起始时,WT+AA-I组小鼠与Alb-PTEN -/-+AA-I组小鼠体重无明显差别,给药后至实验结束期间,WT+AA-I组小鼠体重略高于Alb-PTEN -/-+AA-I组小鼠(图3),而溶剂对照组则表现为Alb-PTEN -/-组小鼠体重略高于小鼠WT组(图3),此结果提示Alb-PTEN -/-小鼠对AA-I敏感性高于WT小鼠。
血液生化结果显示Alb-PTEN -/-+AA-I组小鼠碱性磷酸酶(ALP)显著高于WT+AA-I组小鼠,而WT组小鼠与WT+AA-I组小鼠无明显差异(图4),此结果提示Alb-PTEN -/-小鼠对AA-I敏感性高于正常小鼠,即AA-I会造成Alb-PTEN -/-小鼠肝损伤,对正常小鼠无明显影响。
AA-I 造成Alb-PTEN -/-小鼠肝脏组织病理结果改变,主要表现为细胞质产生空泡样变性,细胞核消失不见(图5),而对正常小鼠影响不大此结果提示AA-I会造成Alb-PTEN -/-小鼠肝损伤,即PTEN基因敲除后造成机体对AA-I敏感性增强。
实施例4临床样本AA-Ⅰ敏感个体筛查
在Human Protein Atlas 数据库中查询PTEN、TSC1、TSC2在肝组织中的表达情况,结果发现在正常个体中PTEN均可检测到中度表达,但是在肝脏肿瘤细胞中未检测到PTEN表达(图8),同时在正常肝脏组织中PTEN基因的FPKM值为18(图9)。TSC1在正常肝组织呈现中度表达,在肝癌组织中呈现中、高度表达,有些病人肝癌组织中未检测到TSC1表达(图8),同时在正常肝脏组织中TSC1基因的FPKM值为2.43(图9)。TSC2在正常肝组织呈现高表达,在肝癌组织中呈现中、高度表达,有些病人肝癌组织中未检测到TSC2表达(图8),同时在正常肝脏组织中TSC2基因的FPKM值为13.2。综合以上结果,将PTEN、TSC1、TSC2基因测序FPKM数值小于0.5以下定义为不表达上述基因的个体,以此判断临床个体是否为AA-Ⅰ敏感个体。
实施例5一种检测AA-Ⅰ敏感性基因的试剂盒
1、试验材料如实施例1、实施例2。
2、试验试剂
RNA提取试剂盒,购自OMEGA公司,批号:R6934010000E1PU021。
cDNA反转录试剂盒,购自东洋纺(上海)生物科技有限公司,批号:061200。
qPCR试剂盒,购自北京全式金生物有限公司,批号:P20814。
PTEN抗体,购自Cell signalling公司,批号:7。
TSC1抗体,购自Cell signallin公司,批号:3。
TSC2抗体,购自Cell signalling公司,批号:1。
预制胶,购自Invitrogen公司,批号:21100210。
Actin抗体,购自SantaCruze公司,批号:E0615。
3、试验仪器
分光光度计:Thermos,美国,型号:NANODROP 2000。
实时荧光定量PCR仪器:Roche,美国,型号:LightCycler 480 Ⅱ。
显影仪:Proteinsimple,美国,型号:FluorChem E。
4、试验方法
(1)PTEN、TSC1、TSC2基因mRNA实时荧光定量PCR检测
mRNA提取:使用OMEGA公司RNA提取试剂盒进行提取RNA工作,提取的细胞系包括:PTEN -/-及其对照WT细胞系,TSC2 -/-及其WT对照细胞系,按照说明书操作即可。
mRNA反转录:使用东洋纺公司mRNA反转录试剂盒进行大鼠胃组织mRNA的转录,按照说明书操作即可。
实时荧光定量qPCR:使用全式金real-time PCR试剂盒对cDNA进行qPCR反应,具体按照说明书操作即可。小鼠、人源的PTEN、TSC1、TSC2基因信息见表1,小鼠qPCR反应所使用的引物序列见表2。
表1:PTEN、TSC2基因信息
表2PTEN、TSC1、TSC2qPCR引物信息
(2) PTEN、TSC1、TSC2蛋白表达western-blot检测
蛋白提取:使用蛋白裂解液裂解细胞。
Western-blot:使用invitrogen公司预制胶进行蛋白质电泳,按照说明书操作即可。一抗:1:1000稀释,二抗1:10000稀释。使用显色试剂进行显影。
5、试验结果
qPCR结果显示,PTEN -/-细胞系与其对照WT细胞系相比PTEN基因的mRNA和蛋白表达明显下调见图6。;TSC2-/-细胞系与其WT对照细胞系相比TSC1、TSC2基因的mRNA和蛋白表达明显下调,见图7。
实施例6试剂盒实际检测效果验证
使用基因敲除小鼠验证试剂盒的检测效果。使用心脏TSC1基因敲除小鼠,提取心脏组织mRNA,进行TSC1、TSC2基因的qPCR反应,结果显示心脏组织中TSC1、TSC2的mRNA表达量明显下调。使用肝脏PTEN基因敲除小鼠,提取肝组织mRNA,进行PTEN基因的qPCR反应,结果显示心脏组织中PTEN的mRNA表达量明显下调。
使用人源的肝细胞系LO2验证试剂盒的检测效果。提取细胞mRNA,进行TSC1基因、TSC2基因、PTEN基因的qPCR反应,结果显示肝细胞中均可检测到这3个基因的表达。
Claims (10)
1.用于检测TSC2的试剂在制备成纤维细胞马兜铃酸敏感性检测产品中的应用。
2.根据权利要求1所述的应用,其特征在于,所述的试剂为特异性结合TSC2的试剂。
3.根据权利要求1所述的应用,其特征在于,所述的试剂为特异性结合TSC2的核酸的试剂。
4.根据权利要求1所述的应用,其特征在于,所述的试剂为用于检测TSC2表达量的试剂。
5.根据权利要求4所述的应用,其特征在于,所述的试剂为特异性扩增TSC2基因的引物和特异性识别TSC2的mRNA的探针。
6.根据权利要求1所述的应用,其特征在于,所述的产品为特异性分析TSC2的芯片或试剂盒。
7.根据权利要求6所述的应用,其特征在于,所述的芯片包括固相载体和特异性识别TSC2的探针。
8.根据权利要求6所述的应用,其特征在于,所述试剂盒的包括核酸抽提试剂、荧光染料、探针和引物中的一种或多种。
9.根据权利要求6所述的应用,其特征在于,所述试剂盒的包括特异性识别TSC2的抗体。
10.根据权利要求9所述的应用,其特征在于,所述试剂盒的还包括固相载体、标准品、底物、终止液和缓冲液中的一种或多种。
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CN112237168A (zh) * | 2019-07-18 | 2021-01-19 | 上海交通大学 | 用马兜铃酸i或其联合四氯化碳构建小鼠肝癌模型的方法 |
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CN112237168A (zh) * | 2019-07-18 | 2021-01-19 | 上海交通大学 | 用马兜铃酸i或其联合四氯化碳构建小鼠肝癌模型的方法 |
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