CN113493524A - 双特异性嵌合抗原受体及其应用 - Google Patents
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Abstract
本发明属于免疫治疗技术领域,具体涉及一种可识别CD19和CD22肿瘤相关抗原的双特异性嵌合抗原受体,一种该嵌合抗原受体的表达载体、CAR‑T细胞及其应用。所述双特异性嵌合抗原受体可识别CD19和CD22双靶点,不仅可以有效的表达于T淋巴细胞,而且能够减少肿瘤免疫逃逸的几率,降低CAR‑T治疗后肿瘤复发率。
Description
技术领域
本发明属于免疫治疗技术领域,具体涉及一种双特异性嵌合抗原受体,包含双特异性嵌合抗原受体的载体,一种表达双特异性嵌合抗原受体的CAR-T细胞及其应用。
背景技术
CAR-T(嵌合抗原受体T)细胞疗法在治疗血液系统恶性肿瘤中已取得了显著成果。但是由于肿瘤尤其是实体瘤的异质性,往往肿瘤细胞表面不止表达一个靶抗原,并且随着研究的进展研发人员还发现经CAR-T细胞治疗的少部分患者出现肿瘤细胞下调或突变其表面表达的CAR-T靶点抗原产生逃逸(Robbie G. Majzner et al. (2018) Tumor AntigenEscape from CAR T-cell Therapy),造成治疗效果较差以及复发等情况。因此设计针对多靶点的CAR结构十分有必要,简单的同时表达2个不同靶点的CAR涉及到不同的CAR结构感染能力不同,会产生多种CAR-T细胞亚群,不利于产品临床应用;如果仅是简单的两个不同靶点CAR结构串联于一个载体,这样CAR载体较大不易转导T细胞,不同的结构涉及到CAR载体病毒制备能力不同,CAR转导能力不同,对T细胞产生的刺激不同,疗效不同等多种因素。
发明内容
有鉴于此,本发明的目的之一在于一种靶向CD19和CD22双靶点的双特异性嵌合抗原受体,所述双特异性嵌合抗体可以同时识别CD19和CD22双靶点,可以避免表达CD19肿瘤对CD19 CART的免疫逃逸,对经CD19 CART治疗后复发但CD19为阴性的患者也可以起到治疗作用。
随着CAR-T治疗临床数据的积累,研究者们发现在CAR-T治疗后复发的患者体内CAR-T针对的靶抗原被下调甚至“丢失”,本发明设计可同时识别两个肿瘤相关靶点的双特异性嵌合抗原受体来避免肿瘤表面其中之一抗原丢失,而导致的CAR-T细胞就失去“杀伤目标”。
为实现上述目的,本发明采用以下方案:
所述CAR结构为靶向CD19和CD22双抗原的双特异性嵌合抗原受体,并且双特异性嵌合抗原受体结构为靶向CD19的嵌合抗原受体与靶向CD22的嵌合抗原受体经自剪切肽连接串联;靶向CD19ScFv的氨基酸序列为SEQ ID NO.8,靶向CD22ScFv的氨基酸序列为SEQ IDNO.9。
进一步,所述的靶向CD19ScFv的氨基酸序列为SEQ ID NO.9,靶向CD22ScFv的氨基酸序列为SEQ ID NO.10。
进一步,所述靶向CD19ScFv的核苷酸序列为SEQ ID NO.2,靶向CD22ScFv的核苷酸序列为SEQ ID NO.3。
进一步,所述的靶向双特异性位点的双CAR自剪切多肽选自T2A、P2A、E2A、F2A以及内部核糖体进入位点IRES。
优选的,所述的嵌合抗原受体包含如SEQ ID NO.1的核苷酸序列。
优选的,所述的嵌合抗原受体连接胞外识别区与跨膜区域的hinge区核苷酸序列如SEQ ID NO.4所示;跨膜区域的核苷酸序列如SEQ ID NO.5所示;胞内共刺激信号域为CD137,核苷酸序列如SEQ ID NO.6所示;胞内信号活化区域为CD3ζ,核苷酸序列如SEQ IDNO.7所示。
优选的,所述的嵌合抗原受体连接胞外识别区与跨膜区域的hinge区氨基酸序列如SEQ ID NO.10所示;跨膜区域的氨基酸序列如SEQ ID NO.11所示;胞内共刺激信号域为CD137,氨基酸序列如SEQ ID NO.12所示;胞内信号活化区域为CD3ζ,氨基酸序列如SEQ IDNO.13所示。
某些实施例中,所述嵌合抗原受体结构中的铰链区序列可以来源于:IgG、CD8、CD7、CD4;所述嵌合抗原受体中跨膜区可以来源于:CD8、CD28、CD3ε、CD4、CD16、CD137、CD80以及CD86;所述嵌合抗原受体中胞内信号区可来源于:CD3、CD137、CD28、CD27、OX40、ICOS、GITR、CD2、CD40、PD-1、PD1L、B7-H3、淋巴细胞功能相关抗原-1(LFA-1)、ICAM-1、CD7、NKG2C、CD83、CD86以及CD127。
本发明的目的之二在于提供一种包含靶向双特异性抗原的嵌合抗原受体的载体。
进一步,所述的嵌合抗原受体的CAR表达载体可以为慢病毒表达载体、逆转录病毒表达载体、腺病毒表达载体、腺相关病毒表达载体、DNA载体,RNA载体、质粒中的任一种。
优选的,所述的CAR表达载体为慢病毒表达载体。
进一步,所述的CAR表达载体包含如SEQ ID NO:1示的核苷酸序列。
在某些实施例中,所述慢病毒载体选自基本上由以下组成的群组:人免疫缺陷病毒1(HIV-1)、人免疫缺陷病毒2(HIV-2)、维斯纳-梅迪病毒(visna-maedi virus,VMV)病毒、山羊关节炎-脑炎病毒(CAEV)、马传染性贫血病毒(EIAV)、猫免疫缺陷病毒(FIV)、牛免疫缺陷病毒(BIV)和猿猴免疫缺陷病毒(SIV)。
在某些实施例中,载体包含左(5')逆转录病毒LTR、Psi(Ψ)包装信号、中心多嘌呤段/DNA瓣(cPPT/FLAP)、逆转录病毒导出元件、可操作地连接到编码本文所涵盖的CAR的多核苷酸的启动子和右(3')逆转录病毒LTR。
在某些实施例中,CAR包含乙型肝炎病毒转录后调节元件(HPRE)或土拔鼠转录后调节元件(WPRE)以及优化的土拔鼠转录后调节元件(oPRE)。
在某些实施例中,CAR表达载体的启动子可以是缺氧诱导调控的启动子。
在某些实施例中,可操作地连接到编码本文所涵盖的CAR的多核苷酸的所述启动子选自由以下组成的群组:WTPGK、截短的PGK启动子、巨细胞病毒立即早期基因启动子(CMV)、延伸因子1α启动子(EF1-α)、磷酸甘油酸激酶-1启动子(PGK)、泛素-C启动子(UBQ-C)、巨细胞病毒增强子/鸡β-肌动蛋白启动子(CAG)、多瘤病毒增强子/单纯疱疹胸苷激酶启动子(MC1)、β肌动蛋白启动子(β-ACT)、猿猴病毒40启动子(SV40)和骨髓增生肉瘤病毒增强子,阴性对照区缺失的、dl587rev引物结合位点取代的(MND)启动子。
本发明的目的之三在于提供一种CAR-T细胞,所述CART细胞可以同时识别CD19和CD22两个肿瘤相关抗原。
进一步,所述的CAR-T细胞可以应用于表达CD19和CD22抗原的肿瘤治疗。
本发明的目的之四在于提供的嵌合抗原受体结构和/或CAR表达载体和/或CAR-T细胞在制备治疗肿瘤的药物中的应用。
具体的,所述细胞可以与其他可增强CAR表达活性的活性剂和/或治疗组合使用。
具体的,所述活性剂和/或治疗可以是手术、化疗、放射、免疫抑制剂,例如环孢素(cyclosporin)、 硫唑嘌呤(azathioprine)、甲氨蝶呤(methotrexate)、霉酚酸酯(mycophenolate)和FK506、抗体或其它免疫清除剂(immunoablativeagents) 例如CAMPATH、抗CD3抗体或其它抗体治疗、环磷酰胺(cytoxan)、氟 达拉滨(fludarabine)、环孢素(cyclosporin)、FK506、雷帕霉素(rapamycin)、 霉酚酸(mycophenolicacid)、类固醇(steroids)、FR901228、细胞因子和辐射。
在某些实施例中,所述细胞可以表达其它活性剂,例如,增 强CAR表达细胞的活性的活性剂。活性剂可以是抑制抑制性分子的活性剂。抑制性分子如PD1可以在一些实施方案中降低CAR表达细胞发动免疫效应子反应的能力。抑制性分子包括 PD1、PD-L1、CTLA4、TIM3、LAG3、VISTA、BTLA、TIGIT,LAIR1、CD160、2B4、CEACAM(CEACAM-1、CEACAM-3、 CEACAM-5)、LAG3、VISTA、BTLA、TIG、LAIR1、CD160、2B4、CD80、CD86、B7-H3(CD276)、B7-H4(VTCN1)、HVEM(TNFRSF14或CD270)、KIR、A2aR、MHC I类、MHC II类、GAL9、腺苷、TGFR(TGFRβ)和TGFRβ。所述抑制性分子的胞外结构域可以融合到跨膜结构域和胞内信号传导结构域,比如PD1CAR。
进一步,所述肿瘤共表达CD19和CD22抗原。
本发明的有益效果在于:
1)本发明提供了一种可同时识别CD19和CD22的嵌合抗原受体,可降低肿瘤免疫逃逸的风险,降低CAR-T治疗后肿瘤复发;
2)本发明提供的双特异性嵌合抗原受体,可以有效的表达于T淋巴细胞,增强CAR-T有效性,提高CAR-T细胞针对肿瘤靶细胞的杀伤,能够用于肿瘤的靶向治疗;
3)本发明提供包含嵌合抗原受体的表达载体制备病毒容易,CAR转导效率高,适合工业化生产。
附图说明
图1:CAR结构图。
图2:双CAR结构在CHO细胞表达检测。
图3:靶细胞抗原表达。
图4:双CAR结构在T淋巴细胞中表达检测。
图5:双CAR体外杀伤结果。
图6:小鼠荷瘤靶细胞表型检测。
图7:双CAR体内杀伤结果。
具体实施方式
以下将参照附图,对本发明的优选实施例进行详细描述。优选实施例中未注明具体条件的实验方法,通常按照常规条件,例如分子克隆实验指南(第三版,J.萨姆布鲁克等著) 中所述的条件,或按照制造厂商所建议的条件。所举实施例是为了更好地对本发明的内容进行说明,但并不是本发明的内容仅限于所举实施例。所以熟悉本领域的技术人员根据上述发明内容对实施方案进行非本质的改进和调整,仍属于本发明的保护范围。
实施例1:质粒构建
设计如图1所示的CAR结构,利用靶向CD19和CD22双靶点CAR进行验证,如图1所示双CAR结构,核酸序列如SEQ ID NO:1所示,利用双酶切分别切割并回收片段,基因片段进行连接、转化并挑单克隆,获得载体编号分别为14。CAR结构原件包含:核苷酸序列如SEQ ID NO:2,氨基酸序列如SEQ ID NO:8的靶向CD19的ScFv;核苷酸序列如SEQ ID NO:3,氨基酸序列如SEQ ID NO:9的靶向CD22的ScFv;核苷酸序列如SEQ ID NO:4,氨基酸序列如SEQ ID NO:10的铰链结构;核苷酸序列如SEQ ID NO:5,氨基酸序列如SEQ ID NO:11的跨膜结构;核苷酸序列如SEQ ID NO:6,氨基酸序列如SEQ ID NO:12的胞内共刺激结构域,核苷酸序列如SEQID NO:7,氨基酸序列如SEQ ID NO:13的胞内活化信号;双靶向CAR的氨基酸序列如SEQ IDNO: 14。
CAR结构如图1所示。
实施例2:制备慢病毒及感染T淋巴细胞
本实施例包装慢病毒采用磷酸钙法,具体为:用含10% FBS(w/v)的DMEM培养基培养293T细胞至较佳状态,包装质粒(RRE:REV:2G)和表达质粒按一定比列加入到1.5的离心管中,加入CaCl2和2× HBS,混匀后室温静置后加入到处理好的293T细胞培养液中,3-5h后再次换液至10mL含10%FBS的DMEM培养基,48h或72h后收集细胞上清,纯化病毒,滴度测定。
滴度表:
制备的慢病毒感染CHO细胞,分别将感染CHO细胞后的CD19CART、CD22CAR-T、双CART19和双CART20采用CD19-FC,CD22-His(Acro,2028b-81XF1-KY)流式标记试剂标记后检测双CAR结构中靶向CD19 CAR和靶向CD22 CAR的表达,用Protein-L检测总的CAR表达,结果如图2所示:CD19CAR-T仅能识别CD19-FC,CD22CART仅能识别CD22-His,而双CART14可以识别CD19-FC和CD22-His双靶点,并且CAR阳性率大于50%。
利用梯度离心法进行淋巴细胞分离;离心后,取第二层白色淋巴细胞层,生理盐水洗涤,加入含有10%FBS的RPMI 1640完全培养基培养,获得人PBMC细胞。获得的PBMC细胞经抗CD3、CD28单克隆抗体活化24h后,按一定的感染复数(MOI)感染已活化的PBMC,在病毒感染的第12天检测CAR-T的阳性率,检测方法为流式检测,抗体为:Protein-L-PE,Protein-L可识别抗体轻链,CAR抗原识别区的ScFv序列的轻链可被Protein-L识别,因此利用Protein-L可检测CAR阳性率和CAR表达强度。
结果如图4所示:在PBMC细胞CAR表达效率大于20%。
实施例3:靶细胞制备和靶抗原检测
以K562-Luc为模式细胞分别构建外源高表达CD19、CD22、共表达CD19和CD22的靶细胞,并采用抗CD19抗体和抗CD22抗体(Acro,2028b-81XF1-KY)检测靶细胞表面抗原表达。结果见图3所示:K562-CD19为仅CD19阳性细胞,K562-CD22为仅CD22阳性细胞,K562-CD19-CD22为CD19和CD22双阳性细胞。
实施例4:双靶点CAR-T有效性验证
分别以CD19单阳性的K562-CD19细胞、CD22单阳性的K562-CD22细胞,CD19和CD22双阳性的K562-CD19-CD22细胞作为靶细胞验证双靶点CAR-T有效性功能,证明双靶点CAR结构的有效性。将效应细胞(CAR-T细胞)按照一定的效靶比铺于靶细胞中,使用Steady-Glo®Luciferase Assay System (Promega Cat. #E2520)试剂盒提供的标准方法检测杀伤效果,杀伤率用下列公式计算:
杀伤结果如图5所示:我们设计的双CAR结构表达的CAR-T细胞不仅对CD19靶点有杀伤效果还对CD22靶点同样具有杀伤效果,还可以对CD19和CD22双阳性的K562-CD19-CD22细胞进行杀伤,并且杀伤效果不亚于单靶点CART对单靶点肿瘤细胞的杀伤。
实施例5、双靶点CAR-T细胞在动物模型中的抗肿瘤效果验证
使用CD19阳性的K562-CD19细胞和CD22阳性的K562-CD22细胞采用1:1混合的方式进行尾静脉回输,构建双靶点小鼠动物模型。图6为靶细胞K562-CD19:K562-CD22=1:1混合后表型检测结果,混合后的靶细胞分别具有CD19和CD22的表达。
体内验证使用小鼠为NOD.Cg-PrkdcscidII2rgtm1Sug/JicCrl,简称NOG小鼠,由日本实验动物研究所(CIEA)的Mamoru Ito培育而成,为国际上CAR-T体内相关成瘤实验最常见品系。体内验证使用的成瘤靶细胞为K562-CD19:K562-CD22=1:1。选择6-8周鼠龄雌性NOD/SCID小鼠,标记耳号后,尾静脉注射K562-CD19:K562-CD22=1:1混合细胞1×106/只细胞量。成瘤第3天测量小鼠肿瘤荧光强度,根据肿瘤体积随机分为生理盐水组、Control T组、CD19 CAR-T组、CD22 CAR-T组以及双CAR 19结构、双CAR 20结构。成瘤第3天向不同分组小鼠尾静脉注射对应的CAR-T细胞3*10^6 CAR-T细胞/只;Control T组于第3天回输总数相同的T淋巴细胞,生理盐水组回输对应体积的生理盐水。
结果如图7所示:与Control T细胞相比,双靶点CAR-T 12和13具有优异的体内杀伤效果,并且双靶点CART14的杀伤细胞优于CD19或CD22单靶点CART体内效果。
最后说明的是,以上实施例仅用以说明本发明的技术方案而非限制,尽管参照较佳实施例对 本发明进行了详细说明,本领域的普通技术人员应当理解,可以对本发明的技术方案进行修 改或者等同替换,而不脱离本发明技术方案的宗旨和范围,其均应涵盖在本发明的权利要求 范围当中。
序列表
<110> 重庆精准生物技术有限公司
<120> 双特异性嵌合抗原受体及其应用
<160> 14
<170> SIPOSequenceListing 1.0
<210> 1
<211> 3033
<212> DNA
<213> 人工序列(Artificial Sequence)
<400> 1
atggcactgc cagtgaccgc cctgctgctg cctctggccc tgctgctgca cgcagcacgc 60
ccagacatcc agatgacaca gtcccccagc tccctgtctg ccagcgtggg cgaccgggtg 120
accatcacat gcagagcctc tcaggatatc agcaagtatc tgaactggta ccagcagaag 180
ccaggcaagg cccccaggct gctgatctat cacacctccc gcctgcactc tggagtgcca 240
agccggttct ccggatctgg aagcggaacc gactacaccc tgacaatctc tagcctgcag 300
cctgaggatt tcgccacata ctattgccag cagggcaata ccctgccata tacatttggc 360
ggaggaacca ggctggagat caagggatcc acatctggaa gcggcaagcc aggatccgga 420
gagggatcta ccaagggaca ggtgcagctg caggagtccg gacctggact ggtgaagcca 480
agccagacac tgtccctgac ctgtacagtg agcggcgtgt ccctgcctga ttacggcgtg 540
tcctggatca gacagccacc tggcaaggcc ctggagtggc tgggcgtgat ctggggctct 600
gagaccacat actattccac ctctctgaag accaggctga caatctctaa ggacaacagc 660
aagaatcagg tggtgctgac catgacaaac atggaccctg tggataccgc cacatactat 720
tgtgccaagc actactatta cggcggcagc tatgccatgg attactgggg ccagggctcc 780
tctgtgaccg tgagctccct cgagaccacg acgccagcgc cgcgaccacc aacaccggcg 840
cccaccatcg cgtcgcagcc cctgtccctg cgcccagagg cgtgccggcc agcggcgggg 900
ggcgcagtgc acacgagggg gctggacttc gcctgtgata tctacatctg ggcgcccttg 960
gccgggactt gtggggtcct tctcctgtca ctggttatca ccctttactg caaacggggc 1020
agaaagaaac tcctgtatat attcaaacaa ccatttatga gaccagtaca aactactcaa 1080
gaggaagatg gctgtagctg ccgatttcca gaagaagaag aaggaggatg tgaactgaga 1140
gtgaagttca gcaggagcgc agacgccccc gcgtacaagc agggccagaa ccagctctat 1200
aacgagctca atctaggacg aagagaggag tacgatgttt tggacaagag acgtggccgg 1260
gaccctgaga tggggggaaa gccgagaagg aagaaccctc aggaaggcct gtacaatgaa 1320
ctgcagaaag ataagatggc ggaggcctac agtgagattg ggatgaaagg cgagcgccgg 1380
aggggcaagg ggcacgatgg cctttaccag ggtctcagta cagccaccaa ggacacctac 1440
gacgcccttc acatgcaggc cctgccccct cgcgaattcg gaagcggagc tactaacttc 1500
agcctgctga agcaggctgg agacgtggag gagaaccctg gacctatggc actgcctgtg 1560
accgccctgc tgctgccact ggccctgctg ctgcacgcag caaggccaca ggtgcagctg 1620
cagcagagcg gaccaggact ggtgaagcca tcccagaccc tgtctctgac atgcgccatc 1680
tccggcgatt ctgtgagctc caacagcgcc gcctggaatt ggatccggca gtcccccagc 1740
cggggcctgg agtggctggg acggacatac tatagatcca agtggtacaa cgattatgcc 1800
gtgagcgtga agtcccggat caccatcaac cccgacacat ctaagaatca gttcagcctg 1860
cagctgaaca gcgtgacccc tgaggacaca gccgtgtact attgtgccag agaggtgacc 1920
ggcgacctgg aggatgcctt tgacatctgg ggccagggca ccatggtgac agtgtctagc 1980
ggcagcacat ccggatctgg caagccagga agcggagagg gctccaccaa gggcgatatc 2040
cagatgacac agtccccctc ctctctgagc gcctccgtgg gcgacagggt gaccatcaca 2100
tgccgcgcct ctcagaccat ctggagctac ctgaactggt atcagcagag gccaggcaag 2160
gcacctaatc tgctgatcta cgcagccagc tccctgcagt ccggagtgcc ttctaggttc 2220
agcggaaggg gatctggaac cgacttcacc ctgacaatct ctagcctgca ggccgaggac 2280
ttcgccacat actattgtca gcagtcttat agcatcccac agacctttgg ccagggcaca 2340
aagctggaga tcaagctcga gaccacgacg ccagcgccgc gaccaccaac accggcgccc 2400
accatcgcgt cgcagcccct gtccctgcgc ccagaggcgt gccggccagc ggcggggggc 2460
gcagtgcaca cgagggggct ggacttcgcc tgtgatatct acatctgggc gcccttggcc 2520
gggacttgtg gggtccttct cctgtcactg gttatcaccc tttactgcaa acggggcaga 2580
aagaaactcc tgtatatatt caaacaacca tttatgagac cagtacaaac tactcaagag 2640
gaagatggct gtagctgccg atttccagaa gaagaagaag gaggatgtga actgagagtg 2700
aagttcagca ggagcgcaga cgcccccgcg tacaagcagg gccagaacca gctctataac 2760
gagctcaatc taggacgaag agaggagtac gatgttttgg acaagagacg tggccgggac 2820
cctgagatgg ggggaaagcc gagaaggaag aaccctcagg aaggcctgta caatgaactg 2880
cagaaagata agatggcgga ggcctacagt gagattggga tgaaaggcga gcgccggagg 2940
ggcaaggggc acgatggcct ttaccagggt ctcagtacag ccaccaagga cacctacgac 3000
gcccttcaca tgcaggccct gccccctcgc taa 3033
<210> 2
<211> 735
<212> DNA
<213> 人工序列(Artificial Sequence)
<400> 2
gacatccaga tgacacagtc ccccagctcc ctgtctgcca gcgtgggcga ccgggtgacc 60
atcacatgca gagcctctca ggatatcagc aagtatctga actggtacca gcagaagcca 120
ggcaaggccc ccaggctgct gatctatcac acctcccgcc tgcactctgg agtgccaagc 180
cggttctccg gatctggaag cggaaccgac tacaccctga caatctctag cctgcagcct 240
gaggatttcg ccacatacta ttgccagcag ggcaataccc tgccatatac atttggcgga 300
ggaaccaggc tggagatcaa gggatccaca tctggaagcg gcaagccagg atccggagag 360
ggatctacca agggacaggt gcagctgcag gagtccggac ctggactggt gaagccaagc 420
cagacactgt ccctgacctg tacagtgagc ggcgtgtccc tgcctgatta cggcgtgtcc 480
tggatcagac agccacctgg caaggccctg gagtggctgg gcgtgatctg gggctctgag 540
accacatact attccacctc tctgaagacc aggctgacaa tctctaagga caacagcaag 600
aatcaggtgg tgctgaccat gacaaacatg gaccctgtgg ataccgccac atactattgt 660
gccaagcact actattacgg cggcagctat gccatggatt actggggcca gggctcctct 720
gtgaccgtga gctcc 735
<210> 3
<211> 747
<212> DNA
<213> 人工序列(Artificial Sequence)
<400> 3
caggtgcagc tgcagcagag cggaccagga ctggtgaagc catcccagac cctgtctctg 60
acatgcgcca tctccggcga ttctgtgagc tccaacagcg ccgcctggaa ttggatccgg 120
cagtccccca gccggggcct ggagtggctg ggacggacat actatagatc caagtggtac 180
aacgattatg ccgtgagcgt gaagtcccgg atcaccatca accccgacac atctaagaat 240
cagttcagcc tgcagctgaa cagcgtgacc cctgaggaca cagccgtgta ctattgtgcc 300
agagaggtga ccggcgacct ggaggatgcc tttgacatct ggggccaggg caccatggtg 360
acagtgtcta gcggcagcac atccggatct ggcaagccag gaagcggaga gggctccacc 420
aagggcgata tccagatgac acagtccccc tcctctctga gcgcctccgt gggcgacagg 480
gtgaccatca catgccgcgc ctctcagacc atctggagct acctgaactg gtatcagcag 540
aggccaggca aggcacctaa tctgctgatc tacgcagcca gctccctgca gtccggagtg 600
ccttctaggt tcagcggaag gggatctgga accgacttca ccctgacaat ctctagcctg 660
caggccgagg acttcgccac atactattgt cagcagtctt atagcatccc acagaccttt 720
ggccagggca caaagctgga gatcaag 747
<210> 4
<211> 135
<212> DNA
<213> 人工序列(Artificial Sequence)
<400> 4
accacgacgc cagcgccgcg accaccaaca ccggcgccca ccatcgcgtc gcagcccctg 60
tccctgcgcc cagaggcgtg ccggccagcg gcggggggcg cagtgcacac gagggggctg 120
gacttcgcct gtgat 135
<210> 5
<211> 72
<212> DNA
<213> 人工序列(Artificial Sequence)
<400> 5
atctacatct gggcgccctt ggccgggact tgtggggtcc ttctcctgtc actggttatc 60
accctttact gc 72
<210> 6
<211> 126
<212> DNA
<213> 人工序列(Artificial Sequence)
<400> 6
aaacggggca gaaagaaact cctgtatata ttcaaacaac catttatgag accagtacaa 60
actactcaag aggaagatgg ctgtagctgc cgatttccag aagaagaaga aggaggatgt 120
gaactg 126
<210> 7
<211> 336
<212> DNA
<213> 人工序列(Artificial Sequence)
<400> 7
agagtgaagt tcagcaggag cgcagacgcc cccgcgtaca agcagggcca gaaccagctc 60
tataacgagc tcaatctagg acgaagagag gagtacgatg ttttggacaa gagacgtggc 120
cgggaccctg agatgggggg aaagccgaga aggaagaacc ctcaggaagg cctgtacaat 180
gaactgcaga aagataagat ggcggaggcc tacagtgaga ttgggatgaa aggcgagcgc 240
cggaggggca aggggcacga tggcctttac cagggtctca gtacagccac caaggacacc 300
tacgacgccc ttcacatgca ggccctgccc cctcgc 336
<210> 8
<211> 245
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 8
Asp Ile Gln Met Thr Gln Ser Pro Ser Ser Leu Ser Ala Ser Val Gly
1 5 10 15
Asp Arg Val Thr Ile Thr Cys Arg Ala Ser Gln Asp Ile Ser Lys Tyr
20 25 30
Leu Asn Trp Tyr Gln Gln Lys Pro Gly Lys Ala Pro Arg Leu Leu Ile
35 40 45
Tyr His Thr Ser Arg Leu His Ser Gly Val Pro Ser Arg Phe Ser Gly
50 55 60
Ser Gly Ser Gly Thr Asp Tyr Thr Leu Thr Ile Ser Ser Leu Gln Pro
65 70 75 80
Glu Asp Phe Ala Thr Tyr Tyr Cys Gln Gln Gly Asn Thr Leu Pro Tyr
85 90 95
Thr Phe Gly Gly Gly Thr Arg Leu Glu Ile Lys Gly Ser Thr Ser Gly
100 105 110
Ser Gly Lys Pro Gly Ser Gly Glu Gly Ser Thr Lys Gly Gln Val Gln
115 120 125
Leu Gln Glu Ser Gly Pro Gly Leu Val Lys Pro Ser Gln Thr Leu Ser
130 135 140
Leu Thr Cys Thr Val Ser Gly Val Ser Leu Pro Asp Tyr Gly Val Ser
145 150 155 160
Trp Ile Arg Gln Pro Pro Gly Lys Ala Leu Glu Trp Leu Gly Val Ile
165 170 175
Trp Gly Ser Glu Thr Thr Tyr Tyr Ser Thr Ser Leu Lys Thr Arg Leu
180 185 190
Thr Ile Ser Lys Asp Asn Ser Lys Asn Gln Val Val Leu Thr Met Thr
195 200 205
Asn Met Asp Pro Val Asp Thr Ala Thr Tyr Tyr Cys Ala Lys His Tyr
210 215 220
Tyr Tyr Gly Gly Ser Tyr Ala Met Asp Tyr Trp Gly Gln Gly Ser Ser
225 230 235 240
Val Thr Val Ser Ser
245
<210> 9
<211> 249
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 9
Gln Val Gln Leu Gln Gln Ser Gly Pro Gly Leu Val Lys Pro Ser Gln
1 5 10 15
Thr Leu Ser Leu Thr Cys Ala Ile Ser Gly Asp Ser Val Ser Ser Asn
20 25 30
Ser Ala Ala Trp Asn Trp Ile Arg Gln Ser Pro Ser Arg Gly Leu Glu
35 40 45
Trp Leu Gly Arg Thr Tyr Tyr Arg Ser Lys Trp Tyr Asn Asp Tyr Ala
50 55 60
Val Ser Val Lys Ser Arg Ile Thr Ile Asn Pro Asp Thr Ser Lys Asn
65 70 75 80
Gln Phe Ser Leu Gln Leu Asn Ser Val Thr Pro Glu Asp Thr Ala Val
85 90 95
Tyr Tyr Cys Ala Arg Glu Val Thr Gly Asp Leu Glu Asp Ala Phe Asp
100 105 110
Ile Trp Gly Gln Gly Thr Met Val Thr Val Ser Ser Gly Ser Thr Ser
115 120 125
Gly Ser Gly Lys Pro Gly Ser Gly Glu Gly Ser Thr Lys Gly Asp Ile
130 135 140
Gln Met Thr Gln Ser Pro Ser Ser Leu Ser Ala Ser Val Gly Asp Arg
145 150 155 160
Val Thr Ile Thr Cys Arg Ala Ser Gln Thr Ile Trp Ser Tyr Leu Asn
165 170 175
Trp Tyr Gln Gln Arg Pro Gly Lys Ala Pro Asn Leu Leu Ile Tyr Ala
180 185 190
Ala Ser Ser Leu Gln Ser Gly Val Pro Ser Arg Phe Ser Gly Arg Gly
195 200 205
Ser Gly Thr Asp Phe Thr Leu Thr Ile Ser Ser Leu Gln Ala Glu Asp
210 215 220
Phe Ala Thr Tyr Tyr Cys Gln Gln Ser Tyr Ser Ile Pro Gln Thr Phe
225 230 235 240
Gly Gln Gly Thr Lys Leu Glu Ile Lys
245
<210> 10
<211> 47
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 10
Lys Pro Thr Thr Thr Pro Ala Pro Arg Pro Pro Thr Pro Ala Pro Thr
1 5 10 15
Ile Ala Ser Gln Pro Leu Ser Leu Arg Pro Glu Ala Cys Arg Pro Ala
20 25 30
Ala Gly Gly Ala Val His Thr Arg Gly Leu Asp Phe Ala Cys Asp
35 40 45
<210> 11
<211> 24
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 11
Ile Tyr Ile Trp Ala Pro Leu Ala Gly Thr Cys Gly Val Leu Leu Leu
1 5 10 15
Ser Leu Val Ile Thr Leu Tyr Cys
20
<210> 12
<211> 44
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 12
Val Lys Arg Gly Arg Lys Lys Leu Leu Tyr Ile Phe Lys Gln Pro Phe
1 5 10 15
Met Arg Pro Val Gln Thr Thr Gln Glu Glu Asp Gly Cys Ser Cys Arg
20 25 30
Phe Pro Glu Glu Glu Glu Gly Gly Cys Glu Leu Arg
35 40
<210> 13
<211> 111
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 13
Val Lys Phe Ser Arg Ser Ala Asp Ala Pro Ala Tyr Gln Gln Gly Gln
1 5 10 15
Asn Gln Leu Tyr Asn Glu Leu Asn Leu Gly Arg Arg Glu Glu Tyr Asp
20 25 30
Val Leu Asp Lys Arg Arg Gly Arg Asp Pro Glu Met Gly Gly Lys Pro
35 40 45
Arg Arg Lys Asn Pro Gln Glu Gly Leu Tyr Asn Glu Leu Gln Lys Asp
50 55 60
Lys Met Ala Glu Ala Tyr Ser Glu Ile Gly Met Lys Gly Glu Arg Arg
65 70 75 80
Arg Gly Lys Gly His Asp Gly Leu Tyr Gln Gly Leu Ser Thr Ala Thr
85 90 95
Lys Asp Thr Tyr Asp Ala Leu His Met Gln Ala Leu Pro Pro Arg
100 105 110
<210> 14
<211> 1010
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 14
Met Ala Leu Pro Val Thr Ala Leu Leu Leu Pro Leu Ala Leu Leu Leu
1 5 10 15
His Ala Ala Arg Pro Asp Ile Gln Met Thr Gln Ser Pro Ser Ser Leu
20 25 30
Ser Ala Ser Val Gly Asp Arg Val Thr Ile Thr Cys Arg Ala Ser Gln
35 40 45
Asp Ile Ser Lys Tyr Leu Asn Trp Tyr Gln Gln Lys Pro Gly Lys Ala
50 55 60
Pro Arg Leu Leu Ile Tyr His Thr Ser Arg Leu His Ser Gly Val Pro
65 70 75 80
Ser Arg Phe Ser Gly Ser Gly Ser Gly Thr Asp Tyr Thr Leu Thr Ile
85 90 95
Ser Ser Leu Gln Pro Glu Asp Phe Ala Thr Tyr Tyr Cys Gln Gln Gly
100 105 110
Asn Thr Leu Pro Tyr Thr Phe Gly Gly Gly Thr Arg Leu Glu Ile Lys
115 120 125
Gly Ser Thr Ser Gly Ser Gly Lys Pro Gly Ser Gly Glu Gly Ser Thr
130 135 140
Lys Gly Gln Val Gln Leu Gln Glu Ser Gly Pro Gly Leu Val Lys Pro
145 150 155 160
Ser Gln Thr Leu Ser Leu Thr Cys Thr Val Ser Gly Val Ser Leu Pro
165 170 175
Asp Tyr Gly Val Ser Trp Ile Arg Gln Pro Pro Gly Lys Ala Leu Glu
180 185 190
Trp Leu Gly Val Ile Trp Gly Ser Glu Thr Thr Tyr Tyr Ser Thr Ser
195 200 205
Leu Lys Thr Arg Leu Thr Ile Ser Lys Asp Asn Ser Lys Asn Gln Val
210 215 220
Val Leu Thr Met Thr Asn Met Asp Pro Val Asp Thr Ala Thr Tyr Tyr
225 230 235 240
Cys Ala Lys His Tyr Tyr Tyr Gly Gly Ser Tyr Ala Met Asp Tyr Trp
245 250 255
Gly Gln Gly Ser Ser Val Thr Val Ser Ser Leu Glu Thr Thr Thr Pro
260 265 270
Ala Pro Arg Pro Pro Thr Pro Ala Pro Thr Ile Ala Ser Gln Pro Leu
275 280 285
Ser Leu Arg Pro Glu Ala Cys Arg Pro Ala Ala Gly Gly Ala Val His
290 295 300
Thr Arg Gly Leu Asp Phe Ala Cys Asp Ile Tyr Ile Trp Ala Pro Leu
305 310 315 320
Ala Gly Thr Cys Gly Val Leu Leu Leu Ser Leu Val Ile Thr Leu Tyr
325 330 335
Cys Lys Arg Gly Arg Lys Lys Leu Leu Tyr Ile Phe Lys Gln Pro Phe
340 345 350
Met Arg Pro Val Gln Thr Thr Gln Glu Glu Asp Gly Cys Ser Cys Arg
355 360 365
Phe Pro Glu Glu Glu Glu Gly Gly Cys Glu Leu Arg Val Lys Phe Ser
370 375 380
Arg Ser Ala Asp Ala Pro Ala Tyr Lys Gln Gly Gln Asn Gln Leu Tyr
385 390 395 400
Asn Glu Leu Asn Leu Gly Arg Arg Glu Glu Tyr Asp Val Leu Asp Lys
405 410 415
Arg Arg Gly Arg Asp Pro Glu Met Gly Gly Lys Pro Arg Arg Lys Asn
420 425 430
Pro Gln Glu Gly Leu Tyr Asn Glu Leu Gln Lys Asp Lys Met Ala Glu
435 440 445
Ala Tyr Ser Glu Ile Gly Met Lys Gly Glu Arg Arg Arg Gly Lys Gly
450 455 460
His Asp Gly Leu Tyr Gln Gly Leu Ser Thr Ala Thr Lys Asp Thr Tyr
465 470 475 480
Asp Ala Leu His Met Gln Ala Leu Pro Pro Arg Glu Phe Gly Ser Gly
485 490 495
Ala Thr Asn Phe Ser Leu Leu Lys Gln Ala Gly Asp Val Glu Glu Asn
500 505 510
Pro Gly Pro Met Ala Leu Pro Val Thr Ala Leu Leu Leu Pro Leu Ala
515 520 525
Leu Leu Leu His Ala Ala Arg Pro Gln Val Gln Leu Gln Gln Ser Gly
530 535 540
Pro Gly Leu Val Lys Pro Ser Gln Thr Leu Ser Leu Thr Cys Ala Ile
545 550 555 560
Ser Gly Asp Ser Val Ser Ser Asn Ser Ala Ala Trp Asn Trp Ile Arg
565 570 575
Gln Ser Pro Ser Arg Gly Leu Glu Trp Leu Gly Arg Thr Tyr Tyr Arg
580 585 590
Ser Lys Trp Tyr Asn Asp Tyr Ala Val Ser Val Lys Ser Arg Ile Thr
595 600 605
Ile Asn Pro Asp Thr Ser Lys Asn Gln Phe Ser Leu Gln Leu Asn Ser
610 615 620
Val Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala Arg Glu Val Thr
625 630 635 640
Gly Asp Leu Glu Asp Ala Phe Asp Ile Trp Gly Gln Gly Thr Met Val
645 650 655
Thr Val Ser Ser Gly Ser Thr Ser Gly Ser Gly Lys Pro Gly Ser Gly
660 665 670
Glu Gly Ser Thr Lys Gly Asp Ile Gln Met Thr Gln Ser Pro Ser Ser
675 680 685
Leu Ser Ala Ser Val Gly Asp Arg Val Thr Ile Thr Cys Arg Ala Ser
690 695 700
Gln Thr Ile Trp Ser Tyr Leu Asn Trp Tyr Gln Gln Arg Pro Gly Lys
705 710 715 720
Ala Pro Asn Leu Leu Ile Tyr Ala Ala Ser Ser Leu Gln Ser Gly Val
725 730 735
Pro Ser Arg Phe Ser Gly Arg Gly Ser Gly Thr Asp Phe Thr Leu Thr
740 745 750
Ile Ser Ser Leu Gln Ala Glu Asp Phe Ala Thr Tyr Tyr Cys Gln Gln
755 760 765
Ser Tyr Ser Ile Pro Gln Thr Phe Gly Gln Gly Thr Lys Leu Glu Ile
770 775 780
Lys Leu Glu Thr Thr Thr Pro Ala Pro Arg Pro Pro Thr Pro Ala Pro
785 790 795 800
Thr Ile Ala Ser Gln Pro Leu Ser Leu Arg Pro Glu Ala Cys Arg Pro
805 810 815
Ala Ala Gly Gly Ala Val His Thr Arg Gly Leu Asp Phe Ala Cys Asp
820 825 830
Ile Tyr Ile Trp Ala Pro Leu Ala Gly Thr Cys Gly Val Leu Leu Leu
835 840 845
Ser Leu Val Ile Thr Leu Tyr Cys Lys Arg Gly Arg Lys Lys Leu Leu
850 855 860
Tyr Ile Phe Lys Gln Pro Phe Met Arg Pro Val Gln Thr Thr Gln Glu
865 870 875 880
Glu Asp Gly Cys Ser Cys Arg Phe Pro Glu Glu Glu Glu Gly Gly Cys
885 890 895
Glu Leu Arg Val Lys Phe Ser Arg Ser Ala Asp Ala Pro Ala Tyr Lys
900 905 910
Gln Gly Gln Asn Gln Leu Tyr Asn Glu Leu Asn Leu Gly Arg Arg Glu
915 920 925
Glu Tyr Asp Val Leu Asp Lys Arg Arg Gly Arg Asp Pro Glu Met Gly
930 935 940
Gly Lys Pro Arg Arg Lys Asn Pro Gln Glu Gly Leu Tyr Asn Glu Leu
945 950 955 960
Gln Lys Asp Lys Met Ala Glu Ala Tyr Ser Glu Ile Gly Met Lys Gly
965 970 975
Glu Arg Arg Arg Gly Lys Gly His Asp Gly Leu Tyr Gln Gly Leu Ser
980 985 990
Thr Ala Thr Lys Asp Thr Tyr Asp Ala Leu His Met Gln Ala Leu Pro
995 1000 1005
Pro Arg
1010
Claims (10)
1.靶向CD19和CD22双抗原的双特异性嵌合抗原受体,其特征在于,双特异性嵌合抗原受体结构为靶向CD19的嵌合抗原受体与靶向CD22的嵌合抗原受体经自剪切肽连接串联;靶向CD19ScFv的氨基酸序列为SEQ ID NO.8,靶向CD22ScFv的氨基酸序列为SEQ ID NO.9。
2.权利要求1所述的嵌合抗原受体,其特征在于,靶向CD19ScFv的核苷酸序列为SEQ IDNO.2,靶向CD22ScFv的核苷酸序列为SEQ ID NO.3。
3.权利要求1所述的嵌合抗原受体,其特征在于,所述嵌合抗原受体核苷酸序列如SEQID NO.1所示。
4.权利要求1所述的嵌合抗原受体,其特征在于,连接胞外识别区与跨膜区域的hinge区氨基酸序列如SEQ ID NO.10所示;跨膜区域的氨基酸序列如SEQ ID NO.11所示;胞内共刺激信号域为CD137,氨基酸序列如SEQ ID NO.12所示;胞内信号活化区域为CD3ζ,氨基酸序列如SEQ ID NO.13所示。
5.权利要求1所述的嵌合抗原受体,其特征在于,连接胞外识别区与跨膜区域的hinge区核苷酸序列如SEQ ID NO.4所示;跨膜区域的核苷酸序列如SEQ ID NO.5所示;胞内共刺激信号域为CD137,核苷酸序列如SEQ ID NO.6所示;胞内信号活化区域为CD3ζ,核苷酸序列如SEQ ID NO.7所示。
6.包含权利要求1-5任一项所述的嵌合抗原受体的CAR表达载体,其特征在于,所述表达载体为慢病毒表达载体、逆转录病毒表达载体、腺病毒表达载体、腺相关病毒表达载体、DNA载体,RNA载体、质粒中的任一种。
7.权利要求6所述的CAR表达载体,其特征在于,所述载体包含如SEQ ID NO:1所示的核苷酸序列。
8.表达权利要求7所述的嵌合抗原受体的CAR-T细胞。
9.权利要求1所述的CAR结构和/或权利要求6所述的表达载体和/或权利要求8所述的CAR-T细胞在制备治疗肿瘤的药物中的应用。
10.根据权利要求9所述的应用,其特征在于,所述肿瘤共表达CD19和CD22抗原。
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