CN117660351A - 人egfr基因双位点突变非小细胞肺癌细胞株hc5720及其应用 - Google Patents
人egfr基因双位点突变非小细胞肺癌细胞株hc5720及其应用 Download PDFInfo
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Abstract
本发明公开了一种人EGFR基因双位点突变非小细胞肺癌细胞株HC5720及其应用。该细胞株有EGFR基因L858R和V834L两个位点的突变,EGFR(L858R Mutant Specific)、角蛋白Pan‑Keratin及Epcam蛋白表达阳性,该细胞株对Erlotinib敏感。该细胞株可以作为研究人EGFR基因L858R和V834L双位点突变非小细胞肺癌细胞形态学及生物学特点、分析EGFR基因L858R和V834L双位点突变靶向药物敏感性及筛选和评估靶向抗肿瘤药物、以及研究耐药机制、耐药性逆转的重要工具,从而为人类寻求更有效的肿瘤治疗方法等,具有较高的科研和生产应用价值,预期有良好的科研、经济和社会效益。
Description
技术领域
本发明涉及肿瘤生物学领域,尤其涉及一种人的EGFR基因L858R和V834L双位点突变非小细胞肺癌细胞株HC5720,同时涉及该非小细胞肺癌细胞株HC5720的应用。
背景技术
肺癌是严重危害人类生命和健康的常见恶性肿瘤。肺癌分为小细胞肺癌(SCLC)和非小细胞肺癌(NSCLC),其中80%~85%为非小细胞肺癌,约2/3非小细胞肺癌存在基因改变,约1/2患者可获得靶向治疗机会。对靶向治疗有显著反应的NSCLC基因型包括表皮生长因子受体(epidermal growth factor receptor,EGFR)突变、ALK基因重排、ROS原癌基因重排等。为了促进和满足对人非小细胞肺癌的研究,需要越来越多的各种人体来源的存在特殊基因改变的肺癌细胞株。为此我们建立了一种人的非小细胞肺癌细胞株HC5720,该细胞株有EGFR基因L858R和V834L两个位点的突变。查阅最新文献,目前世界上还未见有EGFR基因L858R和V834L两个位点的突变细胞株的报道。
发明内容
本发明的目的是提供一种人的EGFR基因L858R和V834L双位点突变非小细胞肺癌细胞株及其应用。该细胞株可用于构建人的有EGFR基因L858R和V834L双位点突变非小细胞肺癌体内外肿瘤的动物和细胞模型,还能用于抗肿瘤药物的筛选及耐药机制的研究等等。
上述提及的人非小细胞肺癌细胞株,命名为人非小细胞肺癌细胞株HC5720,保藏于中国典型培养物保藏中心,地址:湖北省武汉市武昌区八一路299号武汉大学中国典型培养物保藏中心,保藏日期为2023年11月16日,保藏编号为CCTCC NO:C2023357。
所述的人非小细胞肺癌细胞株HC5720,该细胞株有EGFR基因L858R和V834L两个位点的突变。
所述的人非小细胞肺癌细胞株HC5720,该细胞株EGFR(L858R
Mutant Specific)蛋白、角蛋白Pan-Keratin及Epcam蛋白表达阳性,
所述的人非小细胞肺癌细胞株HC5720,该细胞株对Erlotinib敏感。
本发明还提供所述的人非小细胞肺癌细胞株HC5720在药物筛选中的应用。
所述的应用是在筛选制备抗肿瘤药物中的应用。
本发明还提供所述的人非小细胞肺癌细胞株HC5720在构建人非小细胞肺癌体内、外肿瘤模型中的应用。
本发明的细胞株取自一个54岁的女性黄种人的中至低分化腺癌的肺部手术肿瘤标本,然后接种至SCID Beige小鼠背部皮下,当SCID Beige小鼠背部某一点的皮下移植瘤直径大于1-1.5cm时,取瘤块剪碎继续接种至SCID Beige小鼠,这样接种5代,取第5代瘤块用II型胶原酶消化,接种至T25培养瓶中,采用改良的ACL4无血清培养基培养2个月后改用含10%FBS RPMI1640培养基扩增培养。该细胞株角蛋白Pan-Keratin、Epcam、及EGFR(L858RMutant Specific)蛋白表达阳性。
本发明包括以下步骤:
(1)人非小细胞肺癌细胞株HC5720在SCID Beige小鼠背部皮下接种传代及在ACL4无血清培养基中的培养。
(2)人非小细胞肺癌细胞株HC5720在含10%FBS RPMI1640培养基中培养、消化及传代。
(3)人非小细胞肺癌细胞株HC5720角蛋白Pan-Keratin、Epcam及EGFR(L858RMutant Specific)蛋白的表达。
(4)人非小细胞肺癌细胞株HC5720在免疫缺陷小鼠体内的致瘤能力。
(5)检测人非小细胞肺癌细胞株HC5720 EGFR基因突变。
(6)人非小细胞肺癌细胞株HC5720对靶向药物Erlotinib的敏感性。
(7)人非小细胞肺癌细胞株HC5720种属及STR的鉴定。
本发明的人非小细胞肺癌细胞株HC5720,可以用于研究人的EGFR基因L858R和V834L双位点突变非小细胞肺癌细胞形态学及生物学特点、筛选和评估抗肿瘤药物及作用机制、研究肿瘤耐药机制、开发肿瘤耐药逆转药物及研究更有效的肿瘤治疗方法等,并可用于EGFR基因L858R和V834L双位点突变非小细胞肺癌致瘤机制及其相关信号通路的研究。具有较高的科研和生产应用价值,预期能产生良好的科研、经济和社会效益。
附图说明
图1为本发明的人非小细胞肺癌细胞株HC5720在倒置相差显微镜下拍摄的照片;A为40倍,B为100倍。
图2为本发明人非小细胞肺癌细胞株HC5720角蛋白Pan-Keratin、Epcam及EGFR(L858R MUTANT SPECIFIC)蛋白的表达。
A、B、C为HC5720细胞在200倍显微镜下免疫荧光角蛋白Pan-Keratin(A)、Epcam(B)及EGFR(L858R Mutant Specific)(C)蛋白的表达(绿色荧光为角蛋白Pan-Keratin、Epcam及EGFR(L858R Mutant Specific,蓝色荧光为细胞核);D为本发明人非小细胞肺癌细胞株免疫印迹角蛋白Pan-Keratin及EGFR(L858R Mutant Specific)蛋白的表达,平滑肌细胞、H3122细胞株为对照细胞,GAPDH为内参蛋白对照。
图3为本发明人非小细胞肺癌细胞株HC5720在免疫缺陷小鼠SCID Beige皮下所成的瘤体(红色箭头所指处)。
图4为本发明人非小细胞肺癌细胞株HC5720 EGFR基因L858R和V834L双位点突变,箭头处为EGFR基因21号外显子核酸2761G被T取代、2834T被G取代,即第834号氨基酸V被L取代、第858号L被R取代;P0为病人来源的肿瘤标本,P1、P2、P3及P4为SCID Beige小鼠皮下移植瘤,HC5720为建成的HC5720细胞株。
图5为本发明人非小细胞肺癌细胞株HC5720对靶向药物Erlotinib的敏感性测定。
图6为本发明人非小细胞肺癌细胞株HC5720种属(A)及STR(B)的鉴定。
具体实施方式
为详细说明本发明的技术内容、构造特征、所实现目的及效果,以下结合实施方式予以详细说明。
本发明中涉及的现有实验方法、测试方法及溶液配制方法可以参考《细胞实验指南》,标准书号:7-03-007598-6/Q.891原著:[美]D.L.斯佩克特R.D.戈德曼&L.A.莱因万德。
实施例中提及的试剂、抗体及试剂盒均为市购产品。
实施例1人的EGFR基因L858R和V834L双位点突变非小细胞肺癌细胞株HC5720的制备
步骤为:
(1)HC5720细胞获取:细胞取自一个54岁的女性黄种人的中至低分化腺癌的肺部手术肿瘤标本。从手术室无菌取该病人肺肿瘤组织转移至含15mL Hank’s液的无菌离心管中,4℃运至实验室。在实验室生物安全柜中用0.01M PBS缓冲液清洗3次,去除正常组织及坏死肿瘤组织,将瘤体剪成1.0~1.5mm大小的瘤块,接种至SCID Beige小鼠背部皮下,在肿瘤标本离开人体后1h内完成接种。此为第1代荷瘤小鼠(下称P1)。当SCID Beige小鼠某一点的皮下移植瘤直径大于1~1.5cm时,用戊巴比妥钠过量麻醉处死小鼠,剥离肿瘤,取部分瘤块按上述方法继续接种至SCID Beige小鼠背部皮下,重复上述步骤,进行肿瘤传代,建立第2、3、4、5代荷瘤小鼠(下称P2、P3、P4、P5),待P5代皮下移植瘤直径大于1-1.5cm时,用戊巴比妥钠过量麻醉处死小鼠,剥离肿瘤。实验室生物安全柜中用0.01M PBS缓冲液清洗3次,去除正常组织及坏死肿瘤组织,将瘤体剪成1mm×1mm×1mm的组织块,用400units/mlcollagenase type II消化瘤块,将消化好的细胞置于70um一次性滤筛过滤,离心,小心去上清。再次清洗离心,按照人单个核细胞分离液试剂盒分离单个核细胞,以去除死细胞和红细胞,再次清洗细胞两次,去上清,用ACL4培养基将细胞团稀释到0.5×106个/ml,将5ml细胞接种至25cm2培养瓶中。采用ACL4无血清培养基培养2个月后改用含10%FBS RPMI1640培养基扩增培养。
(2)人非小细胞肺癌细胞株HC5720的形态学观察:取人非小细胞肺癌细胞株HC5720接种于25cm2培养瓶中,待生长至对数期,置倒置相差显微镜下观察活细胞形态并拍照,如图1所示,可见本发明细胞株HC5720呈上皮样细胞形态贴壁生长。
(3)本发明人非小细胞肺癌细胞株HC5720的消化:取人非小细胞肺癌细胞株HC5720接种于25cm2培养瓶中,待生长汇合至80%时,吸走培养基,加入5ml不含钙镁磷酸盐缓冲液(D-PBS缓冲液)清洗,加0.25%胰蛋白酶和乙二胺四乙酸(0.25%Trypsin-EDTA)1ml室温消化,镜下观察,待细胞变圆,成流沙样,加入3mL含10%FBS RPMI1640培养基中和,稍吹打,吸入15ml离心管中,800转/分离心5分钟,弃上清,加入含10%FBS RPMI1640培养基,稍吹打混匀,1:3-4传代培养。
(4)本发明人非小细胞肺癌细胞株HC5720的冻存:将实施例1中获得的细胞置入冻存管的冻存液中,再将冻存管置于液氮中保存。冻存液由95%含10%FBS RPMI1640培养基和5%二甲基亚砜(DMSO)组成。冻存过程采取将冻存管置于nalgene程序降温盒,-80℃过夜后放入液氮的步骤。
(5)本发明人非小细胞肺癌细胞株HC5720的复苏:从液氮中取出装有细胞的冻存管,立即直立放入37-40℃水浴中轻轻摇动,保证冻存管盖在水面上,使冻存物在1-2分钟内解冻,用酒精擦拭冻存管外壁后拿入生物安全柜。将解冻后的细胞悬液置于15ml无菌离心管中,加入D-PBS缓冲液5ml,800转/分离心5分钟,弃上清,加入5mL含10%FBS RPMI1640培养基,稍吹打混匀成混合液,吸混合液置入一个25cm2的细胞培养瓶中,拧松瓶盖放入二氧化碳培养箱,在37℃、5%CO2、饱和湿度的条件下培养,2-3天更换培养基一次,细胞密度达到80-90%时消化传代。
实施例2本发明人非小细胞肺癌细胞株HC5720角蛋白Pan-Keratin、Epcam及EGFR(L858R MUTANT SPECIFIC)蛋白的表达。
(1)人非小细胞肺癌细胞株HC5720免疫荧光Pan-Keratin、Epcam及EGFR(L858RMUTANT SPECIFIC)蛋白的表达取12孔板培养的汇合至30-40%本发明人非小细胞肺癌细胞株HC5720,吸去原培养基,冷D-PBS缓冲液漂洗一遍,冰甲醇固定,按常规免疫荧光染色,结果见图2,HC5720表达Pan-Keratin、Epcam及EGFR(L858R MUTANT SPECIFIC)蛋白。
(2)人非小细胞肺癌细胞株HC5720免疫印迹Pan-Keratin及EGFR(L858R MUTANTSPECIFIC)蛋白的表达取6孔板培养的汇合至80-90%本发明人非小细胞肺癌细胞株HC5720,吸去原培养基,冷D-PBS缓冲液漂洗一遍,加入含蛋白酶抑制剂及磷酸酶抑制剂的细胞裂解液,冰上立即用细胞刮刮取细胞,转刮取的细胞抽提液置EP管,超声10-15s,冰上冷却,4℃12000转/分离心10分钟,取上清,用BCA试剂盒测蛋白浓度,取总蛋白25ug加上样缓冲液上样,按蛋白免疫印迹方法常规电泳、转膜、孵育抗体,机器曝光。结果见图2,蛋白免疫印迹的结果显示Pan-Keratin及EGFR(L858R MUTANT SPECIFIC)蛋白表达。
实施例3人非小细胞肺癌细胞株HC5720的细胞生长曲线和倍增时间测定
取本发明的人非小细胞肺癌细胞株HC5720,用0.25%胰蛋白酶和乙二胺四乙酸(0.25%Trypsin-EDTA)消化制备成单细胞悬液,接种于24孔板,每孔细胞1×104个,于24、48、72、96、120、144、168小时计算细胞数,每次计数3孔,取平均值绘制细胞曲线,并计算倍增时间(Td)。按Patterson公式计算细胞在对数生长期的群体倍增时间Td(h)=Tlg2/lg(N/NO),其中T表示细胞对数增值的时间,N为对数增殖期结束时的细胞数,NO为对数增殖期开始时的细胞数,算得HC5720群体倍增时间为27.85±2.08h。
实施例4本发明人非小细胞肺癌细胞株HC5720免疫缺陷小鼠SCID Beige皮下成瘤性测定
用0.25%胰蛋白酶和乙二胺四乙酸(0.25%Trypsin-EDTA)分别消化处于对数生长期的本发明的人非小细胞肺癌细胞株HC5720,预冷PBS洗两遍,去除细胞中残余的血清,预冷无血清培养基吹打细胞沉淀至合适的浓度,加4度基质胶与无血清培养基的比例1:1,2-3×10^6个细胞/只接种至3-4周SCID Beige皮下,接种体积为0.1ml,每周两次观察成瘤情况直至瘤体形成。图3为人非小细胞肺癌细胞株HC5720在免疫缺项小鼠SCID Beige皮下所形成的瘤体。
实施例5人非小细胞肺癌细胞株HC5720的EGFR基因L858R和V834L双位点突变测定
取T25培养瓶培养的汇合至80-90%本发明人非小细胞肺癌细胞株HC5720,吸去原培养基,加入细胞裂解液,按试剂盒的方法抽提RNA,逆转录成CDNA,使用如下引物扩增
EGFRForward 5'-AGCTTGTGGAGCCTCTTACACC-3'
EGFRReverse5'-TAAAATTGATTCCAATGCCATCC-3',送公司测序,分析测序结果,可见HC5720 EGFR基因有L858R和V834L双位点突变,见图4。
实施例6人非小细胞肺癌细胞株HC5720对靶向药物Erlotinib的敏感性测定
取汇合至70%左右的一瓶T25细胞,消化、中和、离心,加培养基混匀计数,取混匀液100ul(约5000个细胞)接种至96孔板,接种24小时后加入不同浓度Erlotinib(0nmol/L、33nmol/L、66nmol/L、100nmol/L、333nmol/L、666nmol/L、1μmol/L、3.33μmol/L、6.66μmol/L、10μmol/L)100ul,每个浓度重复6孔。72小时后用CCK8试剂盒检测,检测结果显示HC5720对Erlotinib敏感,见图5。Erlotinib IC50=96.15nmol/L。
实施例7本发明人非小细胞肺癌细胞株HC5720种属及STR鉴定
取本发明的人非小细胞肺癌细胞株HC5720汇合至80-90%25cm2培养瓶细胞一瓶,吸去培养液,0.25%胰蛋白酶和乙二胺四乙酸(0.25%Trypsin-EDTA)消化,离心,弃去培养基,加入5ml磷酸盐缓冲液,漂洗一遍,离心,弃去磷酸盐缓冲液,将细胞沉淀送至公司进行细胞种属鉴定及人源细胞STR鉴定。结果见图6,细胞来源为人类,HC5720为新细胞株,查阅数据库未见与此一样的STR序列。
以上所述仅为本发明的实施例,并非因此限制本发明的专利保护范围,凡是利用本发明说明书内容所作的等效结构变换,或直接或间接运用在其他相关的技术领域,均同理包括在本发明的专利保护范围内。
Claims (6)
1.一种人EGFR基因双位点突变非小细胞肺癌细胞株HC5720,保藏编号为CCTCC NO:C2023357。
2.如权利要求1所述的人EGFR基因双位点突变非小细胞肺癌细胞株HC5720,其特征在于,该细胞株有EGFR基因L858R和V834L两个位点的突变。
3.如权利要求1所述的人EGFR基因双位点突变非小细胞肺癌细胞株HC5720,其特征在于,该细胞株EGFR(L858R Mutant Specific)蛋白、角蛋白Pan-Keratin及Epcam蛋白表达阳性。
4.如权利要求1所述的人EGFR基因双位点突变非小细胞肺癌细胞株HC5720,其特征在于,该细胞株对Erlotinib敏感。
5.权利要求1所述的人EGFR基因双位点突变非小细胞肺癌细胞株HC5720在药物筛选中,特别是在筛选制备抗肿瘤药物中的应用。
6.权利要求1所述的人EGFR基因双位点突变非小细胞肺癌细胞株HC5720在构建人非小细胞肺癌体内、外肿瘤模型中的应用。
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