CN117482227A - Il-33蛋白和csf1r抗体联用及在制备治疗胃癌腹腔转移药物中的应用 - Google Patents
Il-33蛋白和csf1r抗体联用及在制备治疗胃癌腹腔转移药物中的应用 Download PDFInfo
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Abstract
本发明公开了IL‑33蛋白和CSF1R抗体联用及在制备治疗胃癌腹腔转移药物中的应用,本发明还提供一种药物组合物,所述的药物组合物包括IL‑33蛋白和CSF1R抗体。IL‑33蛋白和CSF1R抗体联用进行腹腔转移肿瘤微环境免疫调控,抑制胃癌腹腔转移进展。本发明通过615系小鼠腹腔瘤实验发现腹腔注射IL‑33蛋白和CSF1R抗体对于抑制615系小鼠胃癌的腹腔转移有显著作用。
Description
技术领域
本发明涉及胃癌药物领域,具体涉及IL-33蛋白和CSF1R抗体联用及在制备治疗胃癌腹腔转移药物中的应用。
背景技术
IL-33是IL-1的家族成员,由上皮细胞、内皮细胞和成纤维细胞分泌,以应对各种刺激,包括感染或细胞应激引起的损伤。IL-33可与表达在T细胞、NK细胞、DC细胞、巨噬细胞等免疫细胞表面的ST2受体结合,诱发机体的免疫反应。IL-33/ST2可刺激多种免疫细胞反应,在调控肿瘤发生发展、维持炎症中起到关键作用。
炎症是肿瘤微环境中影响恶性肿瘤进展的重要因素,越来越多的研究致力于探索IL-33在癌症监控和抗肿瘤免疫中发挥的作用。目前,IL-33在肿瘤发生发展中的具体作用仍存在争议,有研究认为IL-33过表达促进肿瘤进展,然而部分研究则证实IL-33可抑制肿瘤生长转移。目前尚无该药物相关的胃癌腹腔转移研究报道。
发明内容
本发明通过研究IL-33对巨噬细胞的调控,开发新的组合药物用于治疗胃癌腹腔转移,为胃癌腹腔转移临床治疗提供新的方向。
为实现上述目的,本发明提供的技术方案是:
IL-33蛋白和CSF1R抗体联用在制备治疗胃癌腹腔转移药物中的应用。
所述的IL-33蛋白激活免疫细胞发挥抗肿瘤作用,本发明保护IL-33蛋白在制备抗肿瘤免疫细胞激活药物中的应用。
所述的CSF1R抗体清除腹腔中肿瘤相关巨噬细胞,辅助增强IL-33蛋白的抗肿瘤作用,本发明保护CSF1R抗体在制备肿瘤相关巨噬细胞清除药物中的应用。
本发明中IL-33蛋白和CSF1R抗体联用进行腹腔转移肿瘤微环境免疫调控,抑制胃癌腹腔转移进展。
本发明还提供一种药物组合物,所述的药物组合物包括IL-33蛋白和CSF1R抗体,IL-33蛋白与CSF1R抗体的质量比例范围为1:400-1000。
所述的药物组合物还包括药学上可接受的辅料。
与现有技术相比,本发明的有益效果是:
本发明通过基础实验在细胞和动物水平首先证实IL-33对胃癌腹腔转移肿瘤微环境中免疫细胞的激活作用,并发现其可诱导M2型巨噬细胞极化和肿瘤浸润。本发明通过研究IL-33在肿瘤微环境中的作用,发现在应用IL-33激活肿瘤微环境的同时清除免疫抑制细胞或阻止其发挥促肿瘤功能,将有利于进一步增强IL-33的抗肿瘤效果,因此提出了IL-33蛋白和CSF1R抗体联用在制备治疗胃癌腹腔转移药物中的应用,IL-33蛋白和CSF1R抗体联用进行腹腔转移肿瘤微环境免疫调控,抑制胃癌腹腔转移进展。
本发明通过615系小鼠腹腔瘤实验发现腹腔注射IL-33蛋白和CSF1R抗体对于抑制615系小鼠胃癌的腹腔转移有显著作用。鉴于目前胃癌晚期患者易发生腹腔转移且尚无较好的临床治疗方案,IL-33蛋白和CSF1R抗体联合应用为治疗胃癌腹腔转移提供了新的思路,有望成为胃癌腹腔转移临床治疗的新模式。
附图说明
图1显示了IL-33在胃癌中表达下调,并与患者预后相关。
图2显示了IL-33高表达与多种免疫细胞浸润增多相关。
图3显示了在615系小鼠腹腔播散模型中,腹腔应用IL-33蛋白延缓肿瘤生长。
图4显示了在615系小鼠腹腔播散模型中,腹腔应用IL-33蛋白促进腹腔免疫细胞的招募和激活,促进M2巨噬细胞浸润增多。
图5显示了在615系小鼠腹腔播散模型中,腹腔应用IL-33蛋白诱导腹腔炎性环境形成。
图6显示了IL-33蛋白和CSF1R抗体联合应用显著抑制胃癌腹腔转移的进展。
图7显示了肿瘤组织多重免疫荧光检测M2型巨噬细胞浸润。
具体实施方式
以下通过实施例的形式对本发明的上述内容再作进一步的详细说明,但不应将此理解为本发明上述主题的范围仅限于以下的实施例,凡基于本发明上述内容所实现的技术均属于本发明的范围。
下述实施例中所使用的实验方法,如无特殊说明均为常规方法,所用的试剂、方法和设备,如无特殊说明均为本技术领域常规试剂、方法和设备。
本发明经前期研究发现,肿瘤相关巨噬细胞在调节肿瘤微环境中的重要作用。由于CSF1R+巨噬细胞在肿瘤内的存在与各种肿瘤的不良预后相关,因此对微环境中的肿瘤相关巨噬细胞靶向CSF1R信号是消除或重极化这些细胞的一种有效策略。肿瘤相关巨噬细胞及其前体细胞在胃癌腹腔转移中浸润比例较高,可占腹腔转移微环境中免疫细胞的30%。CSF1R介导的信号转导对单核吞噬细胞系统,尤其是巨噬细胞的分化和生存至关重要。
本发明通过研究推测IL-33在肿瘤微环境中具有双重作用,一方面IL-33可以激活正性免疫细胞如CD8+T细胞、NK细胞发挥抗肿瘤作用,另一方面也可以促进免疫抑制细胞如Treg、M2的增殖。因此,在应用IL-33激活肿瘤微环境的同时清除免疫抑制细胞或阻止其发挥促肿瘤功能,将有利于进一步增强IL-33的抗肿瘤效果。
本研究中用于动物实验的IL-33购自BioXcell公司(产品编号:210-33),为重组蛋白。
本发明通过胃癌组织免疫组化等证实IL-33在胃癌中表达下调并与患者预后相关;通过615系小鼠腹腔播散模型抑瘤实验中发现,腹腔局部应用IL-33后腹水上清中γ干扰素、肿瘤坏死因子α等促炎细胞因子表达水平升高,腹腔炎性环境形成。肿瘤中CD8+T细胞、NK细胞、DC及M2巨噬细胞浸润增多,总体上胃癌腹腔播散被抑制。RNA测序提示M2相关标记物及吞噬相关信号通路在IL-33治疗组显著上调富集。在小鼠腹腔播散模型抑瘤实验中发现,局部应用IL-33蛋白联合CSF1R抗体对胃癌腹腔转移有显著协同抗肿瘤作用。
在本发明所述的医药用途中,对于IL-33蛋白和CSF1R抗体联合应用的给药时间、给药次数和给药频率等等,需要根据病情的具体诊断结果而定,这在本领域人员掌握的技术范围之内。
以下结合具体实施例对本发明进行详细的说明:
实施例1:IL-33在胃癌中表达下调,并与患者预后相关
实验方法和结果如下:
1.1应用免疫组化检测170例胃癌患者肿瘤组织样本中IL-33蛋白的表达水平,操作步骤如下:
(1)切片:每个蜡块标本制备2张切片,切片厚度为2μm左右,把切片放于漂烘仪中展平;
(2)烘片:载玻片捞取切片,65℃烘烤40分钟;
(3)脱蜡:将载玻片置入100%二甲苯中,分4缸,每次浸泡2分钟,共4次;将载玻片从二甲苯中取出,依次放入无水乙醇、90%、80%和70%乙醇中浸泡,各2分钟;
(4)用流动清水冲洗约5分钟,直到载玻片表面变为无蜡状态,将载玻片的组织面轻轻擦干;
(5)将载玻片放入3%H2O2中浸泡15分钟;
(6)抗原修复:对于福尔马林固定的石蜡包埋组织切片,用水浴锅加热0.01M枸橼酸钠缓冲液(PH=6.0)至95℃,煮沸热修复,将组织切片置于其中进行加热10-15分钟,待缓冲液冷却后将切片取出;
(7)复温:将装有抗原修复液混合物的压力锅放入冷水中,重新加热至室温,注意勿让冷水入锅中(以下步骤中的载玻片位于湿盒中,必须保持组织湿润);
(8)用免疫组化笔圈出组织范围,加入血清密封液,在37℃的培养箱中孵育1小时,用PBS清洗玻片3次,不要直接正对组织清洗,轻轻晃动使其干燥;
(9)加入一抗:按照说明书将一抗稀释至合适浓度,将稀释好的一抗覆盖整个组织,4℃下孵育过夜;然后室温下复温30分钟以上,PBS缓冲液清洗玻片3次,每次1分钟,注意不要直接正对组织清洗,轻轻晃动使其干燥;
(10)加入二抗:二抗稀释后滴加覆盖于整个组织,在37℃的培养箱中孵育30分钟,用PBS缓冲液洗涤载玻片3次,每次1分钟,注意不要直接正对组织清洗,轻轻晃动使其干燥;
(11)DAB显色:应用DAB染色液,按照每1mlA液加入20ulB液的比例进行配制,混合均匀,将DAB工作液滴加于载玻片组织上,在显微镜下观察10分钟并同时上色,用水即时冲洗,停止染色;
(12)苏木精染色:将载玻片组织浸于苏木精溶液中约1分钟,用流水冲洗,无水乙醇去臭;
(13)应用中性树脂进行封片。
1.2根据阳性染色细胞百分比和染色强度计算出IL-33的IHC评分
IHC Hscore评分(0-12)如下:总分=染色细胞百分比×染色强度。IL-33的表达水平定义如下:1.IL-33低表达(Hscore≤4);2.IL-33高表达(Hscore>4)。
1.3所有胃癌患者通过门诊、住院电子病历系统及电话进行随访
随访内容包括生存情况(存活或死亡)、死亡时间,起始时间是病理确诊日期,截止时间是临床死亡时间或随访截止时间(2020年11月),起始时间与截止时间之间为总生存期。
实验结果如图1所示,图1中A显示了通过免疫组化检测170例人癌旁组织和胃癌组织中IL-33的蛋白表达水平;IL-33在癌旁组织和胃癌肿瘤组织中的表达有差异,IL-33蛋白在胃正常组织中的表达高于肿瘤组织;图1中B显示了与IL-33低表达患者相比,IL-33高表达患者的预后较好(p=0.0141),说明IL-33的表达水平与患者预后显著相关。
实施例2:IL-33高表达与多种免疫细胞浸润增多相关
实验方法和结果如下:
应用生信分析评估胃癌患者不同样本间IL-33的表达差异对免疫细胞浸润的影响,下载TCGA数据库中514例胃癌样本RNA测序数据,利用xCell工具分析胃癌样本免疫细胞浸润程度,p<0.05表示有显著差异。
实验结果如图2所示,利用xCell工具分析了TCGA-STAD中的样本,IL-33高表达与多种免疫细胞浸润增多相关,如CD8+T细胞、DC细胞、M2型巨噬细胞等浸润显著增加;此外,IL-33高表达与总体免疫评分、基质评分和微环境评分呈正相关,说明IL-33高表达与肿瘤微环境的激活相关。
实施例3:615系小鼠腹腔播散模型中,腹腔应用IL-33蛋白延缓肿瘤生长
实验方法和结果如下:
3.1MFC胃癌腹腔瘤动物模型的建立:
选取对数增殖期的MFC胃癌细胞系,胰酶消化后收集细胞,PBS重悬至2.5×106/ml,置于冰上;选取体重18-20g,鼠龄6周,SPF级雌性615系小鼠,取酒精棉球消毒615系小鼠右下腹部区域皮肤,用1ml无菌注射器吸取混匀的肿瘤细胞悬液,对615系小鼠进行腹腔肿瘤种植,细胞种植量约为5×105/只(200ul),旋转推针后用棉签轻压针眼处,防止细胞悬液溢出。
3.2MFC胃癌腹腔瘤动物模型的抗肿瘤疗效评价:
根据小鼠体重将其分为2组:空白对照组(仅给予PBS)、IL-33组,每组5只;按上述方法种瘤,615系小鼠腹腔注射5×105个MFC细胞建立腹腔播散模型,种瘤当天记为Day0(D0),D2开始对小鼠进行治疗,IL-33组腹腔注射给药IL-33蛋白,给药剂量为20μg/kg,每2天给药1次。于治疗观察终点(D16)处死小鼠,暴露腹腔;评估空白对照组和IL-33治疗组小鼠腹腔内肿瘤结节和肠系膜肿瘤结节数目、小鼠腹腔内肿瘤重量。
实验结果如图3所示,图3中A显示了IL-33在小鼠腹腔播散模型中的给药示意图,615系小鼠(每组5只)腹腔注射5×105个MFC细胞,于D0腹腔种瘤,D2开始对小鼠进行治疗,给予IL-33腹腔注射,给药剂量为20μg/kg,每2天给药1次,于治疗观察终点(D16)处死小鼠,暴露腹腔;PBS组作为空白对照组;图3中B显示了与仅给予PBS的空白对照组相比,IL-33治疗组腹腔内肿瘤结节和肠系膜肿瘤结节明显减少;对取出的肿瘤组织进行称重发现,与空白对照组相比,IL-33治疗组肿瘤结节的重量较低,具有统计学差异(p=0.0032)。
实施例4:在615系小鼠腹腔播散模型中,腹腔应用IL-33促进腹腔免疫细胞的招募和激活,促进M2巨噬细胞浸润增多。
实验方法和结果如下:
4.1肿瘤组织单细胞悬液的制备:
针对实施例3中的小鼠,取腹腔播散肿瘤组织,置于6孔板中;6孔板每孔加入2ml含1mg/ml的IV型胶原酶、100单位/ml的DNA酶的RPMI-1640培养基,37℃孵箱中消化2小时;充分消化后,应用70μm滤器研磨过滤;1500rpm离心5分钟;加入适量(3ml)红细胞裂解液,裂解3分钟;加入3倍体积PBS终止红细胞裂解;1500rpm离心5分钟,去上清,获得单细胞沉淀。
4.2流式细胞术检测小鼠肿瘤组织中免疫细胞浸润情况:
将单细胞沉淀用1ml RPMI-1640重悬至12孔板中;刺激阻断:12孔板的每个孔加入2ul Leukocyte Activation Cocktail,37℃放置4-6小时;将12孔板中的细胞转移至1.5mlEP管中,1500rpm离心5分钟,去上清;表面marker染色:每管应用200ul PBS重悬细胞,加入表面流式抗体各2ul,4℃避光孵育30分钟;每管加入1ml PBS清洗,1500rpm离心5分钟,弃上清;固定破膜:每管加入250ul固定/破膜液,4℃孵育20分钟;每管加入1ml的1×washbuffer清洗1次,1500rpm离心5分钟,去上清;胞内细胞因子染色:取适量细胞因子流式抗体,用wash buffer稀释至50ul,重悬细胞,4℃避光孵育30分钟;每管加入1ml wash buffer清洗1次,1500rpm离心5分钟,去上清;100ul stain buffer重悬细胞,上机检测,数据应用Flowjo软件分析结果。
实验结果如图4所示,取实施例3中小鼠肿瘤组织,制备肿瘤组织单细胞悬液,通过流式细胞术检测不同免疫细胞亚群:CD8+T细胞、NK细胞、巨噬细胞和M2巨噬细胞的浸润情况;IL-33治疗组的CD8+T细胞、NK细胞、总体巨噬细胞和M2细胞的浸润明显高于PBS对照组;此外,IL-33治疗组中CD8+T细胞、NK细胞分泌γ干扰素明显升高,说明IL-33作用下免疫细胞的抗肿瘤功能被激活。
实施例5:在615系小鼠腹腔播散模型中,腹腔应用IL-33蛋白诱导腹腔炎性环境形成。
实验方法和结果如下:
应用流式微球技术(CBA)检测实施例3中两组小鼠腹水上清中Th1/Th2细胞因子的变化情况。
(1)标准品准备:用250ul Assay buffer溶解标准品冻干粉,颠倒多次充分混匀,室温平衡10分钟;转移至EP管中,标记为C7;另取7个EP管,分别标记为C6、C5、C4、C3、C2、C1、C0,每个EP管中加入75ul Assay buffer;以4倍倍比梯度稀释,即从C7中取出25ul依次梯度稀释,直到稀释至C1为止;C0为Assay buffer(0pg/ml),用作对照管;
(2)样品准备:取小鼠腹水,1500rpm离心5分钟,获取腹水上清。取50ul小鼠腹水上清与50ul Assay buffer混合,稀释样本;
(3)混合CBA微球:根据样本数计算微球用量,将未预混的微球涡旋1分钟后按用量混合,Assay buffer补齐体积;
(4)建立检测体系:标准品孔:25ul Matrix B+25ul标准品+25ul混合微球;样品孔:25ul Assay buffer+25ul样品+25ul混合微球;
(5)加入检测抗体:避光,涡旋震荡,室温孵育2小时;3000rpm离心5分钟,去上清,注意不要打散磁珠;每管加入25ul检测抗体,避光,涡旋震荡,室温孵育1小时;每管直接加入25ul SA-PE,避光,涡旋震荡,室温孵育30分钟;3000rpm离心5分钟,去上清,注意不要打散磁珠;每管加入150-300ul 1×wash buffer,涡旋震荡1分钟。
样本数据收集完毕后,应用CBA专用分析软件LEGENDplex进行标准曲线的绘制及数据分析。
实验结果如图5所示,收集实施例3中两组小鼠腹水,离心后取腹水上清用CBA方法检测上清中Th1/Th2细胞因子水平;检测结果显示,与PBS对照组相比,腹腔局部应用IL-33蛋白后,促炎细胞因子γ干扰素、IL-5、肿瘤坏死因子α、IL-2分泌水平显著提高,说明IL-33蛋白可诱导腹腔炎性环境形成。
实施例6:IL-33蛋白和CSF1R抗体联合应用显著抑制胃癌腹腔转移的进展。
实验方法和结果如下:
1.1MFC胃癌皮下瘤模型的构建:
胰酶消化处于对数增殖期的MFC胃癌细胞系,重悬肿瘤细胞,调整细胞终浓度为5×107/ml,置于冰上;选取体重18-20g,鼠龄6周,SPF级雌性615系小鼠,局部脱毛后取酒精棉球消毒615系小鼠右下腹部区域皮肤,用1ml无菌注射器吸取混匀的肿瘤细胞悬液,对615系小鼠进行皮下肿瘤种植,细胞种植量约为5×106/只(100ul),种瘤部位是右侧腹股沟处皮下,注入肿瘤细胞悬液后可见种植部位皮下鼓起小包,旋转推针后用棉签轻压针眼处,防止细胞悬液溢出。
1.2抗肿瘤作用评估:
按照上述方法种瘤,种瘤当天记为Day0(D0),根据小鼠体重将小鼠随机分为4组,每组5只:空白对照组、IL-33组、CSF1R抗体组、IL-33+CSF1R抗体组。D2开始对小鼠进行治疗,IL-33组和IL-33+CSF1R抗体组对小鼠给药IL-33蛋白,给药剂量为20μg/kg,每2天给药1次;CSF1R抗体组和IL-33+CSF1R抗体组对小鼠给药CSF1R抗体,给药剂量为400ug/只,每3天给药1次。于治疗观察终点(D22)处死小鼠,暴露腹腔。评估4组小鼠腹腔内肿瘤结节和肠系膜肿瘤结节数目、小鼠腹腔内肿瘤重量。
实验结果如图6所示,图6中A:IL-33蛋白和CSF1R抗体联合应用腹腔瘤治疗模式图。图6中B:与IL-33单药组或CSF1R抗体单药组相比,IL-33+CSF1R抗体联合治疗组小鼠腹腔内肿瘤重量明显降低。图6中C:与IL-33单药组或CSF1R抗体单药组相比,IL-33+CSF1R抗体联合治疗组小鼠腹腔内肠系膜上肿瘤结节数目明显减少,有更好的抑瘤作用。
实施例7:肿瘤组织多重免疫荧光检测M2型巨噬细胞浸润。
实验方法和结果如下:
针对实施例6中4组小鼠肿瘤组织分别进行免疫荧光染色评估巨噬细胞相关标记物表达
(1)组织固定:将组织从4%多聚甲醛中取出,依次于50%、70%、80%、90%、100%的乙醇中脱水,每一级别脱水30分钟;
(2)脱蜡及水化:脱水后将组织于二甲苯与无水乙醇的混合液中放置2小时,后于二甲苯I(1.5小时),二甲苯II(1.5小时)透明处理;
(3)组织浸蜡去除多余的透明液,石蜡包埋;
(4)切片:蜡块于切片机中切片,厚度2μm,切片于水中展平;
(5)载玻片捞片,37℃烘干;
(6)脱蜡:切片依次放于二甲苯20分钟,无水乙醇和二甲苯1:1混合液5分钟,100%、90%、80%、70%的乙醇中脱蜡各1分钟;
(7)用流动清水冲洗约5分钟,直到载玻片表面变为无蜡状态,然后将载玻片的组织面轻轻擦干;
(8)抗原修复:对于福尔马林固定的石蜡包埋组织切片,用水浴锅加热0.01M枸橼酸钠缓冲液(PH=6.0)至95℃,煮沸热修复,将组织切片置于其中进行加热10-15分钟,待缓冲液冷却后将切片取出;
(9)PBS清洗切片5分钟;
(10)将切片置于0.025%TritonX-100的TBS中洗2次,每次5分钟;
(11)5%BSA中室温孵育1小;
(12)按说明书稀释一抗,向切片部分滴加稀释后的一抗,4℃避光过夜;
(13)将切片置于0.025%TritonX-100的TBS中洗2次,每次5分钟;
(14)每张切片滴加50ul hoechst染色10分钟;
(15)避光,PBS清洗玻片3次,每次5分钟;
(16)应用抗荧光淬灭封片液进行封片,纸巾轻轻擦掉多余封片液,玻片于4℃避光保存;
(17)荧光显微镜或共聚焦显微镜下观察组织切片。
实验结果如图7所示,对实施例6中的4组小鼠肿瘤组织石蜡切片行CD86和CD163的多重免疫荧光检测。蓝色荧光信号为DAPI染色的细胞核,红色荧光信号表示CD86的表达,绿色荧光信号表示CD163的表达。结果表明,与空白对照组相比,局部腹腔应用IL-33蛋白,小鼠腹腔播散肿瘤中CD163的表达明显上调,说明M2型巨噬细胞浸润增多;当应用CSF1R抗体后,CD163荧光信号显著减弱,说明巨噬细胞被清除,M2型巨噬细胞浸润减少。
以上所述,仅是本发明的较佳实施例,并非对本发明作任何形式上的限制,任何熟悉本专业的技术人员,在不脱离本发明技术方案范围内,依据本发明的技术实质,对以上实施例所作的任何简单的修改、等同替换与改进等,均仍属于本发明技术方案的保护范围之内。
Claims (6)
1.IL-33蛋白和CSF1R抗体联用在制备治疗胃癌腹腔转移药物中的应用。
2.根据权利要求1所述的应用,其特征在于:所述的IL-33蛋白激活免疫细胞发挥抗肿瘤作用。
3.根据权利要求2所述的应用,其特征在于:所述的CSF1R抗体清除腹腔中肿瘤相关巨噬细胞,辅助增强IL-33蛋白的抗肿瘤作用。
4.根据权利要求1-3任一项所述的应用,其特征在于:IL-33蛋白和CSF1R抗体联用进行腹腔转移肿瘤微环境免疫调控,抑制胃癌腹腔转移进展。
5.一种药物组合物,其特征在于:所述的药物组合物包括IL-33蛋白和CSF1R抗体,IL-33蛋白与CSF1R抗体的质量比例范围为1:400-1000。
6.根据权利要求5所述的药物组合物,其特征在于:还包括药学上可接受的辅料。
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WO2021068196A1 (en) * | 2019-10-11 | 2021-04-15 | General Regeneratives (Shanghai) Limited | Methods of using il-33 protein in treating cancers |
WO2022166909A1 (en) * | 2021-02-08 | 2022-08-11 | The First Hospital Of Jilin University | Use of ppar-delta inhibitor in combination with immunotherapeutic drug for preparing anti-tumor drug |
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WO2021068196A1 (en) * | 2019-10-11 | 2021-04-15 | General Regeneratives (Shanghai) Limited | Methods of using il-33 protein in treating cancers |
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