CN115475252A - 一种基于非天然核酸适体的protac的制备方法及其在三阴性乳腺癌治疗中的应用 - Google Patents
一种基于非天然核酸适体的protac的制备方法及其在三阴性乳腺癌治疗中的应用 Download PDFInfo
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- CN115475252A CN115475252A CN202211119800.6A CN202211119800A CN115475252A CN 115475252 A CN115475252 A CN 115475252A CN 202211119800 A CN202211119800 A CN 202211119800A CN 115475252 A CN115475252 A CN 115475252A
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Abstract
本发明属于非天然核酸筛选和乳腺癌靶向治疗领域,尤其涉及一种基于非天然核酸适体的PROTAC(PROteolysis‑TArgeting Chimera)的制备方法及其在三阴性乳腺癌治疗中的应用。本发明首先利用体外筛选技术鉴定出能够结合c‑Myc/Max二聚体的苏糖核酸(TNA)适体,连接天然结合c‑Myc的E box DNA序列,形成二价亲和分子,进一步连接泛素连接酶E3的配体,构建TNA适体‑E box‑E3配体复合物(TEP),该复合物特异性诱导c‑Myc降解。当与palbociclib联用时,TEP高效抑制了三阴性乳腺癌小鼠中肿瘤的生长。与现有的小分子抑制剂比较,本发明中的基于非天然核酸的PROTAC分子亲和性更高,在使用剂量更小的情况下,仍具有高效的抗肿瘤效果。TNA的引入增强了复合物的亲和力、生物稳定性和靶向性,更适用于体内应用,为TNBC的靶向治疗提供了新的策略。
Description
技术领域
本发明属于非天然核酸筛选和乳腺癌靶向治疗领域,尤其涉及一种基于非天然核酸适体的PROTAC的制备方法及其在三阴性乳腺癌治疗中的应用。
背景技术
乳腺癌是发病率第一,死亡率第二的恶性肿瘤。其中,三阴性乳腺癌(Triple-negative breast cancer,TNBC)的侵袭性强、复发率高、临床预后差。因缺少可利用的有效靶点,治疗药物的选择十分有限。许多在其他乳腺癌亚型中具有较好疗效的靶向药物分子,在TNBC的治疗中响应率较低。
近年来,越来越多的研究表明,c-Myc是TNBC潜在的治疗靶点。c-Myc是一类癌基因,在超过50%的人类癌症中高表达。c-Myc与其相关因子X(Max)共同作用结合DNA增强子原件结合DNA增强子原件(E box,5’-CAC[G/A]TG-3’),调节下游参与细胞的增殖、分化、凋亡以及血管生成的靶基因的转录。在TNBC中,c-Myc的高表达与TNBC预后差相关,因此,靶向抑制c-Myc可能为TNBC提供一种潜在的治疗策略。
目前报道的靶向c-Myc抑制剂主要为小分子抑制剂,其作用机制是阻断c-Myc与Max的相互作用,从而阻断转录功能。然而,c-Myc是一类天然的无序蛋白,缺乏小分子可以利用的识别位点,寻找直接作用于c-Myc的小分子抑制剂是国际上药物研发的难点,目前已经报道的c-Myc的小分子抑制剂活性普遍较低,特异性差,毒性高,进入临床应用较为困难。核酸适体是一类具有靶向功能的生物大分子,可以利用的结合位点更多,经过化学修饰的非天然核酸具备区别于天然核酸的化学结构,可以增强核酸分子的生物稳定性,是新型的可以用于疾病的诊断和治疗的分子工具。
核酸适体与靶标结合通常是一一对应的关系,为了实现适体在体内与靶标形成多次转换对应的关系,可以借鉴蛋白降解靶向嵌合体(PROteolysis TArgeting Chimera,PROTAC),在适体的序列末端通过化学手段连接一个泛素连接酶的配体,在细胞内招募泛素连接酶,对临近的蛋白进行泛素化标记,从而诱导蛋白质降解。在这个过程中,由于核酸适体-泛素连接酶配体复合物不会被降解,所以一个核酸适体-泛素连接酶配体复合物可以诱导多个蛋白的降解。
综上所述,利用体外筛选技术分离可以靶向c-Myc/Max二聚体的TNA适体,并在筛选文库中引入E box DNA序列,竞争性抑制c-Myc/Max复合物与靶基因的结合,同时利用内源蛋白酶体降解途径,诱导c-Myc/Max二聚体降解,实现抑制活性与诱导降解的双功能,在体内体外抑制TNBC增殖,为TNBC的治疗提供新的策略。
发明内容
本发明的目的是为了解决背景技术中提及的c-Myc小分子抑制剂的特异性差,毒性高的问题,提供一种基于非天然核酸适体的PROTAC的制备方法及其在三阴性乳腺癌治疗中的应用。
为实现上述技术目的,本发明采取的技术方案为:
一种基于非天然核酸适体的PROTAC配体复合物,其包括结合c-Myc/Max二聚体的非天然核酸适体和天然结合c-Myc/Max的E box DNA序列,同时在非天然核酸适体–E box的末端连接一个E3泛素连接酶配体。
上述的一种基于非天然核酸适体的PROTAC配体复合物,其所述的非天然核酸包括苏糖核酸TNA或氟代阿拉伯糖核酸FANA或锁核酸LNA。
上述的一种基于非天然核酸适体的PROTAC配体复合物,其所述E3泛素连接酶配体包括泊马度胺、沙利度胺、来那度胺、阿伐度胺或吲地磺胺。
一种基于非天然核酸适体的PROTAC的制备方法,其包括以下步骤:体外筛选非天然核酸适体;将非天然核酸适体进行高通量测序,挑选拷贝数高的序列进行亲和性测试;连接E box DNA;将E3泛素连接酶配体连接到非天然核酸适体-E box的末端,即制得降解c-Myc的非天然核酸PROTAC。
上述的一种基于非天然核酸适体的PROTAC的制备方法,其体外筛选非天然核酸适体包括以下步骤:
1)以生物素标记的DNA随机文库为模板,体外“转录”合成非天然核酸文库,通过链霉亲和素树脂分离,乙醇沉淀法收集非天然核酸文库;
2)体外构建c-Myc/Max二聚体,与非天然核酸文库孵育,非天然核酸文库与c-Myc/Max的摩尔比为第一轮1:1,第二轮2:1,第三轮10:1,通过毛细管电泳进行分离,毛细管进样体积为11nL,回收与c-Myc/Max结合的组分;
3)以回收到的组分为模板,使用非天然核酸聚合酶将非天然核酸“逆转录”为DNA序列,用于下一轮筛选。
上述的一种基于非天然核酸适体的PROTAC的制备方法,其亲和性测试包括以下步骤:
1)利用带有E box增强子序列的引物,以DNA序列为模板,在非天然核酸聚合酶催化下,“转录”合成带有E box序列的非天然核酸序列;
2)通过链霉亲和素柱分离非天然核酸-E box链;
3)将带有E box序列的DNA作为互补链,与非天然核酸-E box链进行退火,形成杂交双链;
4)将上述的杂交双链与c-Myc/Max二聚体孵育30min,利用8%的非变性聚丙烯酰胺凝胶电泳分析混合物,在80V恒压及冰浴条件下,电泳1h,分析亲和性强弱。
上述的一种基于非天然核酸适体的PROTAC的制备方法,其将E3泛素连接酶配体连接到非天然核酸适体的E box的末端的具体方法为:利用酰胺化反应将E3泛素连接酶配体连接到非天然核酸适体的E box的末端,形成TEP分子;
一种基于非天然核酸适体的PROTAC的应用,其所述非天然核酸PROTAC应用于抑制三阴性乳腺癌增殖。
上述的一种基于非天然核酸适体的PROTAC的应用,其利用阳离子脂质体纳米粒子包裹CDK4/6抑制剂或TEP,进行药物联用。
有效效果:
本发明的基于非天然核酸适体的c-Myc抑制剂利用非天然核酸作为分子工具,结合PRORAC技术,实现对c-Myc的特异性降解,与现有的小分子抑制剂比较,本发明中的非天然核酸抑制剂的亲和性更高,使用剂量更小,生物毒性更低。
附图说明
图1是TNA适体E box与E3泛素连接酶配体结合的原理概括说明图。
图2是筛选后的TNA适体E box结合c-Myc/Max的示意图;其中,A.TNA与DNA结构单元。B.筛选过程示意图。凝胶电泳迁移方法测试TNA aptamer-E box对c-Myc/Max的亲和力的胶图和亲和力计算图,T1E(C,D),T2E(E,F),T3E(G,H)和E box(I,J)。
图3是E box和筛选后富集程度最高的三条序列的二级结构预测示意图。
图4是TNA适体E box结合内源性c-Myc的示意图。其中,A和B.Pull down实验证明三条TNA aptamer-E box可以结合三阴性乳腺癌细胞系MDA-MB-468和Hs578T中的c-Myc/Max的示意图;C.共聚焦荧光显微镜对转染了TNA aptamer-E box的Hs578T细胞进行成像的成像图。
图5是TEP分子在细胞内降解c-Myc的示意图。其中,A.pomalidominde-COOH连接TE的示意图。B.TEP在细胞内降解c-Myc,而E box-pomalidominde(EP)和对照序列DNA-pomalidominde(DP)不能降解c-Myc;C.TEP降解c-Myc的浓度梯度。D.TEP降解c-Myc的时间梯度图。E.TEP处理Hs578T细胞后,免疫荧光表征细胞内的c-Myc的表达水平的示意图。F.小分子MYCi975降解c-Myc的浓度梯度图。G.100nM的TE,100nM的TEP和100nM TEP与150nM的蛋白酶体抑制剂MG132共同处理4T1细胞后的c-Myc水平。
图6是TEP与帕博西布的协同作用图。A,B和C.100nM的TEP和不同浓度的帕博西布的协同作用图,其中,当帕博西布为5mM时协同效应最为明显。
图7是E-box单链序列连接泊马度胺前后的质谱结果图。
图8是TEP分子与相同序列的DNA的序列在10%人血清中的稳定性实验的示意图;
图9是脂质体纳米粒子包裹TEP或帕博西部的粒径分布测量图,琼脂糖凝胶电泳验证脂质体与TEP结合图。
图10是TEP与帕博西布联合治疗。A,对荷瘤小鼠进行间隔给药示意图。B,脂质体搭载核酸后,通过小鼠尾静脉注射,在体内可以靶向4T1肿瘤部位。C,不同给药组小鼠肿瘤的大小对比照片。D,不同给药组小鼠肿瘤的生长曲线。E,不同给药组小鼠肿瘤的重量。F,各组肿瘤的苏木精&伊红(H&E)染色图,Ki67和c-Myc的免疫组化的代表性图片。
具体实施方式
以下结合附图对本发明的实施例作进一步详细描述。
实施例1
如图1、图2所示,本发明提供了一种基于非天然核酸适体的PROTAC配体复合物,包括结合c-Myc/Max二聚体的非天然核酸适体和天然结合c-Myc/Max的E box DNA序列,同时在非天然核酸适体–E box的末端连接一个E3泛素连接酶配体。非天然核酸包括苏糖核酸TNA或氟代阿拉伯糖核酸FANA或锁核酸LNA等非天然核酸。E3泛素连接酶配体包括泊马度胺、沙利度胺、来那度胺、阿伐度胺或吲地磺胺。核酸适体是一类具有靶向功能的生物大分子,可以利用的结合位点更多,经过化学修饰的非天然核酸适体具备区别于天然核酸的化学结构,可以增强核酸分子的生物稳定性。同时,在E box的末端连接泛素连接酶的配体泊马度胺pomalidomide,利用内源蛋白酶体降解途径,诱导c-Myc/Max二聚体循环降解,实现抑制活性与诱导降解的双功能,对TNBC的治疗效果更佳。
一种基于非天然核酸适体的PROTAC的制备方法,包括以下步骤:
步骤一、体外筛选非天然核酸适体,包括以下步骤:
1)制备非天然核酸文库,参照表1、图2所示,以生物素标记的DNA随机文库为模板,外源添加FAM标记的DNA引物P1,在Kod-RI DNA聚合酶的催化下体外“转录”合成非天然核酸TNA文库,利用链霉素亲和柱分离法分离出TNA文库单链。体外构建c-Myc/Max二聚体,在模拟的生理条件下(136mM NaCl,2.6mM KCl,4mM Na2HPO4,1.8mM KH2PO4,2mM MgCl2,pH 7.4)与TNA文库孵育。TNA文库与c-Myc/Max的摩尔比为:第一轮1:1,第二轮2:1,第三轮10:1;
2)体外构建c-Myc/Max二聚体,与TNA文库孵育,TNA文库与c-Myc/Max的摩尔比为第一轮1:1,第二轮2:1,第三轮10:1,通过毛细管电泳进行分离,毛细管内径50μm,总长度60cm,毛细管进样体积为11nL,回收与c-Myc/Max结合的组分;
3)以回收到的组分为模板,使用Bst DNA聚合酶将TNA序列“逆转录”为相应的DNA序列;进行PCR扩增,分离单链后,回收DNA模板,再进行“转录”反应制备TNA文库,产生可用于下一轮筛选的TNA文库;
循环进行“转录-链分离-孵育-靶标结合组分分离-逆转录-扩增-链分离”的步骤。
上述的实验步骤循环进行3轮。
步骤二、筛选后的非天然核酸适体进行高通量测序,挑选拷贝数高的序列进行亲和性测试,连接E box DNA,包括以下步骤:
1)利用Cy5.5标记的引物P3,引物部分带有E box增强子序列,以生物素标记的DNA序列为模板,在Kod-RI催化下,“转录”合成非天然核酸序列;将富集后的DNA文库进行高通量测序,选择其中拷贝数较高的序列进行活性测试,并进行序列统计分析。拷贝数最高的三条序列的二级结构如图2B所示;
2)通过链霉亲和素柱分离Cy5.5-E box-TNA;
3)使用一段22nt的带有E box序列的DNA作为互补链,将Cy5.5标记的E box-TNA与含有E box序列的22nt的DNA退火,形成TNA-E box(TE)分子杂交双链;
4)将c-Myc和Max按摩尔比1:1孵育30min,将100nM的Cy5.5-TE与不同浓度的c-Myc/Max在37℃下培养1h,孵育缓冲液为20mM Tris,50mM NaCl,2mM MgCl2,0.1%Tween-20,pH 7.5,总体积10μL。孵育后加入5μL 50%的甘油,通过8%的非变性聚丙烯酰胺凝胶电泳分析,在80V恒压、冰浴条件下,电泳1h,电泳后使用Odyssey CLx成像,使用自带软件Image J software分析定量。参照表2、图3所示,对结合了c-Myc/Max二聚体的Cy5.5-Ebox-TNA进行定量,分析亲和性强弱。
步骤三、将E3泛素连接酶配体连接到TNA-E box的末端,即制得降解c-Myc的非天然核酸PROTAC,包括以下步骤:
1)利用酰胺化反应将E3泛素连接酶配体泊马度胺连接到TNA-E Box的末端,形成TEP分子;
2)将TEP分子转染到TNBC细胞内部。
参照图4-图8,本实施例测试结果如下:
(1)TE分析结合内源性c-Myc测试。
使用1%的BSA处理链霉亲和素磁珠,室温下震荡1h。100pmole Biotin-TE分子与100μL磁珠孵育1h,孵育缓冲液:20mM Tris,1M NaCl,1mM EDTA,pH 7.5。高速离心收集磁珠,清洗一次,缓冲液:20mM Tris,10mM NaCl,0.1%Tween-20,pH 7.5。使用非变性的细胞裂解液裂解细胞Hs578T和MDA-MB-468细胞。200μg的全细胞裂解液与磁珠在4℃下孵育过夜,使用一条随机序列作为对照,孵育后高速离心收集磁珠,使用清洗缓冲液重悬磁珠,摇晃5分钟,重复3次,加入30μL 1×蛋白上样缓冲液,99℃下煮10min,最后用于Western Blot分析。
(2)荧光共定位分析
在35-mm玻璃皿中种植1×106个Hs578T细胞,培养过夜。FAM标记的TE分子通过Lipofectamine3000转染到1×106个Hs578T细胞内。步骤如下:50pmole FAM-TE溶解在25μLOpti-MEM中,5μL的Lipofectamine3000溶解在25μL Opti-MEM中,混合后室温下孵育15min,加入到1mL Opti-MEM中,与Hs578T细胞孵育6h后,PBS洗一次,用4%的多聚甲醛固定细胞,室温下避光固定30min。使用Hoechst 33258染色30min,PBS洗两次,使用Olympus激光共聚焦荧光显微镜对细胞成像。
(3)TEP在细胞内降解c-Myc
1)DNA-pomalidomide的制备。利用酰胺化反应将E3泛素连接酶配体连接到TNA-EBox的末端,形成TEP分子;
1mg COOH标记的pomalidomide在激活缓冲液(15mM EDC,15mM NHS,100mM MES,500mM NaCl,pH 6.0)中震荡30min,温度为25℃。加入60μL 100nmole的NH2-DNA和40μL 1MNaHCO3 pH 8.5,25℃下反应2h。反应后产物用乙醇沉淀收集,HPLC纯化。
2)经过退火杂交形成TEP;
3)将TEP分子转染到TNBC细胞内部。
(4)免疫荧光
在35-mm玻璃皿中种植1×106个Hs578T细胞,培养过夜。TEP复合物通过Lipofectamine3000转染到Hs578T细胞内,步骤同上。转染后换成含10%FBS,1%青霉素-链霉素双抗的DMEM培养基,继续培养24h。PBS洗一次,用4%的多聚甲醛固定细胞,室温下避光固定30min。0.1%Triton-X 100对细胞处理10min,用含1%BSA的PBST室温下封闭1h。使用c-Myc一抗(1:100,ab32072)4℃下过夜孵育,细胞用PBST清洗两次,使用Alex555标记的二抗(1:200,ab150078)室温下避光孵育1h。PBST清洗两次,Hoechst 33258室温下染色30min,PBST清洗两次。使用Olympus激光共聚焦荧光显微镜对细胞成像。
(5)CCK8细胞活力测试
在6孔板中种植1×106个Hs578T细胞,培养过夜。转染TEP浓度为100nM,转染步骤如(4)所示,转染后继续培养12h,以5×103的密度转接到96孔板中,培养12h。使用不同浓度的帕博西布(1,5and 10μM)处理细胞24h。使用CCK8试剂盒追踪监测细胞活力,1h后,测量450nm的吸收值,计算每个孔的细胞活力。
本发明应用于抑制三阴性乳腺癌增殖,利用阳离子脂质体纳米粒子包裹CDK4/6抑制剂或TEP,进行药物联用。参照图9所示,脂质体纳米粒子包裹TEP和帕博西布粒径分布测量图。包裹TEP和帕博西布的阳离子脂质体纳米粒子的制备步骤如下:
(6)采用薄膜水合法制备阳离子脂质体
使用电子分析天平准确称取10mg 1,2-dioleoyl-3-trimethylammonium-propane(chloride salt)(DOTAP)、10mg 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine(DOPE)、25mg Soybean soft phospholipid(S100)、12.5mg cholesterol、2.5mg 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[amino(polyethylene glycol)-2000-cRGD(DSPE-PEG2000-cRGD)和1.5mg帕博西布,溶解在10ml氯仿-甲醇(5:1,v/v)溶液中,并置于25mL茄形瓶中,通过旋转蒸发器在40℃水浴中减压蒸发30min至所有有机溶剂蒸发,且在瓶壁上沉积了一层磷脂薄膜,随后在真空干燥箱中放置过夜,以确保完全除去残留的溶剂。将脂膜溶解在5mL超纯水中,60℃下水化1小时。用超声探头在400W的脉冲(脉冲1s,脉冲1s)下超声10分钟,超声后使用0.22μm滤膜过滤,得到脂质体纳米溶液,储存在4℃冰箱以备使用。
(7)体内靶向以及抑制肿瘤生长实验
向体重为15g左右的雌性Balb/c小鼠背部皮下注射2×107个4T1肿瘤细胞,待体积达到200mm3左右时,尾静脉注射搭载了Cy5-TEP的脂质体,Cy5-TEP约为2nmole。2小时后对其体表进行成像。
向体重为15g左右的雌性Balb/c小鼠背部皮下注射2×107个4T1肿瘤细胞,待一周后,体积达到100mm3左右时开始间隔给药,采用肿瘤原位注射的方式,TEP(6mg/kg),帕博西布(10mg/kg),联合组TEP(6mg/kg)+帕博西布(10mg/kg),一共给药四次,每两天测量肿瘤大小,采用V=1/2ab2的公式计算肿瘤体积。移植肿瘤后第17天将肿瘤剥出,拍照,称量。
本发明首先利用体外筛选技术鉴定出能够结合c-Myc/Max二聚体的苏糖核酸(TNA)适体,连接天然结合c-Myc的E box序列,形成二价亲和分子,进一步借鉴靶向PROTAC,连接泛素连接酶E3的配体,构建TNA适体-E box-E3配体复合物,特异性诱导c-Myc降解。该技术方案可以应用于治疗三阴性乳腺癌药品,利用脂质体纳米粒子同时包裹CDK4/6抑制剂和基于非天然核酸适体的c-Myc抑制剂,进行药物联用。与现有的小分子抑制剂比较,本发明中的非天然核酸抑制剂的亲和性更高,使用剂量更小。苏糖核酸的引入能够增强复合物的生物稳定性,更适用于体内应用,为TNBC的靶向治疗提供新的策略。
以上仅是本发明的优选实施方式,本发明的保护范围并不仅局限于上述实施例,凡属于本发明思路下的技术方案均属于本发明的保护范围。应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理前提下的若干改进和润饰,应视为本发明的保护范围。
Claims (9)
1.一种基于非天然核酸适体的PROTAC复合物分子,其特征在于:包括结合c-Myc/Max二聚体的非天然核酸适体、天然结合c-Myc/Max的E box DNA 序列、以及一个招募E3泛素连接酶的小分子配体。
2.根据权利要求1所述的一种基于非天然核酸适体的PROTAC复合物,其特征在于:所述的非天然核酸为苏糖核酸TNA。
3.根据权利要求1所述的一种基于非天然核酸适体的PROTAC复合物,其特征在于:所述E3泛素连接酶配体为泊马度胺Pomalidominde。
4.根据权利要求1-3任意一项所述的一种基于非天然核酸适体的PROTAC的制备方法,其特征在于,包括以下步骤:体外筛选非天然核酸适体;对富集文库进行高通量测序,挑选拷贝数高的序列进行亲和性测试;连接非天然核酸适体、E box DNA和E3泛素连接酶配体,即制得靶向降解c-Myc的、基于非天然核酸的PROTAC。
5.根据权利要求4所述的一种基于非天然核酸适体的PROTAC的制备方法,其特征在于,体外筛选非天然核酸适体包括以下步骤:
1)以生物素标记的DNA随机文库为模板,体外“转录”合成非天然核酸文库,通过链霉亲和素树脂分离,乙醇沉淀法收集非天然核酸文库;
2)体外构建c-Myc/Max二聚体,与非天然核酸文库孵育,非天然核酸文库与c-Myc/Max的摩尔比为第一轮1:1,第二轮2:1,第三轮10:1,通过毛细管电泳进行分离,毛细管进样体积为11 nL,回收与c-Myc/Max结合的非天然核酸组分;
3)以回收到的组分为模板,使用非天然核酸聚合酶将非天然核酸“逆转录”为DNA序列,用于下一轮筛选。
6.根据权利要求4所述的一种基于非天然核酸适体的PROTAC的制备方法,其特征在于,亲和性测试包括以下步骤:
1)利用带有E box增强子序列的引物,以DNA序列为模板,在非天然核酸聚合酶催化下,“转录”合成带有E box序列的非天然核酸序列;
2)通过链霉亲和素柱分离非天然核酸-E box链;
3)将带有E box序列的DNA作为互补链,与非天然核酸-E box链进行退火,形成杂交双链;
4)将上述的杂交双链与c-Myc/Max二聚体孵育30 min,利用8%的非变性聚丙烯酰胺凝胶电泳分析混合物,在80 V恒压及冰浴条件下,电泳1 h,分析亲和性强弱。
7.根据权利要求4所述的一种基于非天然核酸适体的PROTAC的制备方法,其特征在于:将E3泛素连接酶配体连接到非天然核酸适体的E box的末端的具体方法为:利用酰胺化反应将E3泛素连接酶配体连接到非天然核酸适体的E Box的末端,形成非天然核酸-E box-E3泛素连接酶配体分子。
8.根据权利要求1-7任意一项所述的一种基于非天然核酸适体的PROTAC的应用,其特征在于:所述非天然核酸PROTAC应用于抑制三阴性乳腺癌增殖。
9.根据权利要求8所述的一种基于非天然核酸适体的PROTAC的应用,其特征在于:利用阳离子脂质体纳米粒子包裹CDK4/6抑制剂或TEP,进行药物联用。
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WO2022161502A1 (zh) * | 2021-02-01 | 2022-08-04 | 羿尊生物医药(浙江)有限公司 | 一种靶向蛋白降解系统及其应用 |
CN114895029A (zh) * | 2022-03-08 | 2022-08-12 | 中南大学 | 用于检测和/或治疗三阴性乳腺癌的dna核酸链靶向系统及其制备和应用 |
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WO2022161502A1 (zh) * | 2021-02-01 | 2022-08-04 | 羿尊生物医药(浙江)有限公司 | 一种靶向蛋白降解系统及其应用 |
CN114895029A (zh) * | 2022-03-08 | 2022-08-12 | 中南大学 | 用于检测和/或治疗三阴性乳腺癌的dna核酸链靶向系统及其制备和应用 |
Non-Patent Citations (2)
Title |
---|
XINTONG LI等: "c‑Myc-Targeting PROTAC Based on a TNA-DNA Bivalent Binder for Combination Therapy of Triple-Negative Breast Cancer", 《JOURNAL OF THE AMERICAN CHEMICAL SOCIETY》, 26 April 2024 (2024-04-26) * |
李欣彤: "非天然核酸适体的体外筛选及非天然核酸的纳米孔测序", 《中国博士学位论文全文数据库基础科学辑》, 15 December 2021 (2021-12-15), pages 72 - 83 * |
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