CN1824307A - 一种治疗b细胞淋巴瘤的药物组合物 - Google Patents
一种治疗b细胞淋巴瘤的药物组合物 Download PDFInfo
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Abstract
本发明涉及一种治疗B细胞淋巴瘤的药物组合物,该药物由利妥昔(Rituximab,Rituxan,美罗华)和SAHA(suberoylanilide hydroxamicacid,辛二酰苯胺氧肟酸)组成,该药物有明显协同作用,较单用可显著抑制B淋巴瘤细胞生长增殖,协同诱导凋亡,协同抑制NF-κB活性和下调BCL-XL表达。两药组合在提高疗效的同时可大幅降低治疗费用。
Description
技术领域
本发明涉及一种治疗癌症的药物组合物,尤其涉及一种治疗B细胞淋巴瘤的药物组合物。
背景技术
淋巴瘤是一种起源于淋巴组织的恶性肿瘤,近年来在世界范围内的发病率几乎增长了一倍,严重危害人类的健康。B细胞淋巴瘤是最常见的淋巴瘤种类,约占淋巴瘤的50-60%。除早期、局限性、低度恶性的B细胞淋巴瘤可单纯使用放射治疗外,目前主要的治疗方式仍为联合化疗。采用联合化疗可使约50-60%的患者获得疾病缓解,20-30%的患者获得长期生存,但大部分患者对治疗无效或治疗后迅速复发,疾病进展快,预后差。更重要的是,化疗的毒副反应大,患者尤其是老年或合并其它疾病患者不能耐受。
CD20广泛表达于B细胞淋巴瘤细胞表面,是开展免疫治疗的理想靶点。近年来,人-鼠嵌合性抗CD20单克隆抗体利妥昔(Rituximab,Rituxan,美罗华)已成功应用于临床,通过抗体介导的针对细胞特异表面标记的免疫治疗,具有低毒,低骨髓抑制和较高特异性的特点,为B细胞淋巴瘤的治疗开辟了新途径。然而患者的治疗费用昂贵,部分患者在治疗早期或疾病复发时发生耐药。因此,研究利妥昔和其他药物联合应用的可行性对于提高疗效、降低费用具有重要意义。
组蛋白去乙酰化酶(histone deacetylase,HDAC)抑制剂可通过抑制HDAC,阻断由于HDAC募集功能紊乱而导致的基因表达受抑,有显著的抗肿瘤效应。其中SAHA(suberoylanilide hydroxamic acid,辛二酰苯胺氧肟酸)已进入II期临床,治疗复发的B细胞淋巴瘤患者有一定的疗效,是一种极具潜力的靶向治疗药物。
发明内容
本发明的目的在于提供一种治疗B细胞淋巴瘤的药物组合物。
本发明的目的是通过以下技术方法来实现的:本发明一种治疗B细胞淋巴瘤的药物组合物,该药物由利妥昔和SAHA组成。利妥昔用量为1-100μg/ml,SAHA用量为1-10μM。利妥昔用量可为1-50μg/ml,SAHA用量可为1-5μM。利妥昔用量优选为20μg/ml,SAHA用量优选为2.5μM。
本发明应用了以下两种人的细胞株:对利妥昔敏感的滤泡型淋巴瘤SU-DHL-4细胞株,和对利妥昔耐药的Burkitt’s淋巴瘤Daudi细胞株。该两种人的细胞株分别经不同浓度的利妥昔(0、1、20、50、100μg/ml)和SAHA(0、1、2.5、5、10μM)联合处理,进行了MTT实验、流式细胞仪检测annexin-V和线粒体跨膜电位实验、免疫印迹分析实验及核蛋白胶电泳转移检测实验。
本发明所公开的一种治疗B细胞淋巴瘤的药物组合物,其优点表现在:通过使用本发明的药物组合物,发挥两种药的协同作用,可以协同抑制B淋巴瘤细胞生长增殖,协同诱导B淋巴瘤细胞凋亡,协同抑制NF-κB活性和下调BCL-XL表达。两药组合在提高疗效的同时下可大幅降低费用。
附图说明
图1A显示单用利妥昔抑制B淋巴瘤细胞生长的效果图。
图1B显示单用SAHA抑制B淋巴瘤细胞生长的效果图。
图1C显示合用利妥昔、SAHA抑制B淋巴瘤细胞生长的效果图。
图2A显示流式细胞仪检测滤泡型淋巴瘤SU-DHL-4细胞株凋亡对照组的效果图。
图2B显示单用利妥昔诱导滤泡型淋巴瘤SU-DHL-4细胞株凋亡的效果图。
图2C显示单用SAHA诱导滤泡型淋巴瘤SU-DHL-4细胞株凋亡的效果图。
图2D显示合用利妥昔、SAHA诱导滤泡型淋巴瘤SU-DHL-4细胞株凋亡的效果图。
图2E显示合用利妥昔、SAHA诱导滤泡型淋巴瘤SU-DHL-4细胞株凋亡的协同指数效果图。
图2F显示用流式细胞仪检测Burkitt’s淋巴瘤Daudi细胞株凋亡对照组的效果图。
图2G显示单用利妥昔诱导Burkitt’s淋巴瘤Daudi细胞株凋亡的效果图。
图2H显示单用SAHA诱导Burkitt’s淋巴瘤Daudi细胞株凋亡的效果图。
图2I显示合用利妥昔、SAHA诱导Burkitt’s淋巴瘤Daudi细胞株凋亡的效果图。
图2J显示合用利妥昔、SAHA诱导Burkitt’s淋巴瘤Daudi细胞株凋亡的协同指数效果图。
图3显示单用及合用利妥昔或SAHA作用24小时线粒体跨膜电位的结果图。
图4A显示单用及合用利妥昔或SAHA对滤泡型淋巴瘤SU-DHL-4细胞株Caspase-3、PARP和BCL-XL影响的结果图。
图4B显示显示单用及合用利妥昔或SAHA对Burkitt’s淋巴瘤Daudi细胞株Caspase-3、PARP和BCL-XL影响的结果图。
图5显示单用及合用利妥昔或SAHA对B淋巴瘤细胞NF-κB活性影响的结果图
具体实施方式
下面结合实施例对本发明作进一步描述。
实施例1
一种治疗B细胞淋巴瘤的药物组合物制备
本发明一种治疗B细胞淋巴瘤的药物组合物,该药物由利妥昔和SAHA按照一定的浓度比例混合制得。其中利妥昔用量为20μg/ml,SAHA用量为2.5μM。
实施例2
一种治疗B细胞淋巴瘤的药物组合物制备
本发明一种治疗B细胞淋巴瘤的药物组合物,该药物由利妥昔和SAHA按照一定的浓度比例混合制得。其中利妥昔用量为1μg/ml,SAHA用量为10μM。
实施例3
一种治疗B细胞淋巴瘤的药物组合物制备
本发明一种治疗B细胞淋巴瘤的药物组合物,该药物由利妥昔和SAHA按照一定的浓度比例混合制得。其中利妥昔用量为100μg/ml,SAHA用量为1μM。
实施例4
一种治疗B细胞淋巴瘤的药物组合物药效评价
(一)试剂:
利妥昔购自上海罗氏公司,-4℃保存。SAHA由上海默沙东赠送,溶解于DMSO中,储存液浓度为100mM,-20℃保存。MTT、碘化丙啶(PI)、rhodamine 123(Rh123)、二硫苏糖醇购自Sigma公司。抗PARP、caspase-3、BCL-XL、NF-κB(P65)、过氧化物酶偶联的羊抗鼠二抗和羊抗兔二抗均购自Santa Cruz公司。抗β-actin购自Abcam公司。
(二)细胞培养,细胞存活和细胞形态学:
本研究应用了以下两种人的细胞株:滤泡型淋巴瘤SU-DHL-4细胞株,对利妥昔敏感,Burkitt’s淋巴瘤Daudi细胞株,对利妥昔耐药。淋巴瘤细胞在5%CO2-95%空气,饱和湿度以及37℃的条件下,培养于RPMI-1640培养液中(Gibco/BRL),并加入10%胎牛血清。在每次实验中,细胞接种密度为2×105/ml。细胞的存活率采用台盼兰拒染实验检测。细胞形态学观察采用瑞氏染色法。
(三)MTT实验:
在96孔板中,用不同浓度利妥昔或SAHA处理细胞。72小时后,向每孔中加入0.1mg MTT,在37℃下孵育4小时后,在分光光度计570nm处测量标本吸光度值。
(四)流式细胞仪检测annexin-V和线粒体跨膜电位:
细胞凋亡用ApoAlert Annexin V-FITC Apoptosis kit(BD)进行分析。在检测线粒体跨膜电位中,细胞用PBS洗后,在37℃下与10μg/mlRh123孵育30分钟,然后再用50μg/ml PI染色。荧光强度用流式细胞仪进行测量。
(五)免疫印迹分析:
用200ml Laemmli裂解缓冲液(0.5M Tris-HCl,pH6.8,2mM EDTA,10%glycerol,2%SDS and 5%β-mercaptoethanol)裂解5×106细胞。蛋白裂解物(20μg)用于10%聚丙烯酰胺凝胶电泳,再转移至硝酸纤维素膜上。硝酸纤维素膜在溶于TBS/0.05%Tween 20的5%脱脂牛奶中封闭,之后与一抗在室温孵育2小时,与辣根过氧化物酶标记的二抗孵育1小时。免疫复合物用辣根过氧化物酶化学发光检测试剂盒检测。
(六)核蛋白分离:
1×107细胞与不含NP-40的裂解缓冲液(10mM HEPES,10mM KCl,1.5mM MgCl2,0.5mM DTT,pH7.9)洗后,重悬于提取缓冲液(20mM HEPES,pH7.9,420mM NaCl,0.5mM DTT,0.2mM EDTA and 25%甘油)中,冰上孵育20分钟。12000×g离心10分钟后,上清即为核蛋白。
(七)胶电泳转移检测实验:
Daudi细胞核蛋白提取物用考马斯亮蓝试剂(Pierce)定量。核蛋白(10μg)与32P标记的双链NF-κB(5’-AGTTGAGGGGACTTTCCCAGGC-3’)共有序列孵育,然后用4%非变性PAGE凝胶分离,用放射自显影检测被标记的条带。
(八)统计分析:
实验结果用三次独立实验的平均值和标准差表示,用t检验来比较差异。P值小于0.05则认为具有统计学差异。所有的统计采用SAS8.2软件。
(九)结果:
采用CD20阳性B淋巴瘤细胞系SU-DHL-4和Daudi细胞进行培养,通过分析生长曲线观察利妥昔、SAHA单独及联合应用对细胞生长增殖的影响。B淋巴瘤细胞分别经不同浓度的利妥昔(0、1、20、50、100μg/ml)和SAHA(0、1、2.5、5、10μM)联合处理。单用和合用不同剂量利妥昔或SAHA对B淋巴瘤细胞的抑制作用见图1A、图1B、图1C,利妥昔(20μg/ml)联合SAHA(2.5μM)应用48小时可显著抑制SU-DHL-4和Daudi细胞的增殖。
用流式细胞仪检测单用及合用药后B淋巴瘤细胞的凋亡(Annexin V和PI双染法)。SU-DHL-4经利妥昔20μg/mL、SAHA 2.5μM及利妥昔20μg/mL与SAHA 2.5μM联合处理的48小时后,Annexin V阳性细胞分别为:对照组3.4%(见图2A);利妥昔组17.3%(见图2B);SAHA组26.3%(见图2C);利妥昔与SAHA合用组56.7%(见图2D)。在Daudi细胞中:对照组3.0%(见图2F);利妥昔组4.2%(见图2G);SAHA组24.4%(见图2H);利妥昔与SAHA合用组61.7%(见图2I)。同时我们应用Berenbaum建立的等效应线图法分析利妥昔与SAHA的联合应用是协同、相加或拮抗。将利妥昔与SAHA单用与合用Annexin V阳性率取30%±5%,计算两者合用的协同指数(combined index,CI):CI=d1/D1+d2/D2。D1、D2代表单用药物1和2时产生30%±5%效应时所需的药物剂量,d1、d2代表联合应用药物1和2时产生同等效应时的药物剂量。CI>1,图形为凸形,两者联合应用为拮抗作用,CI=1,图形为一直线,两者联合应用为相加作用,CI<1,图形为凹形,两者联合应用为协同作用。利妥昔与SAHA作用于SU-DHL-4和Daudi细胞,图形均为凹型(见图2E、图2J),证明两者为协同作用。
用亲脂阴离子染料Rh123和PI双染色检测单个细胞可获得线粒体跨膜电位(Δψm)和细胞膜的完整性,前者由于线粒体摄取量与线粒体Δψm成正比,摄取量减少表示Δψm下降;PI不能通过完整的细胞膜,细胞发生凋亡早期细胞膜仍保持完整,PI不能进入细胞,反之,坏死细胞膜破坏早期即发生PI染色增加。请参阅见图3,经利妥昔(20μg/ml)联合SAHA(2.5μM)合用24小时后出现了Δψm的下降。
利妥昔与SAHA单用或合用SU-DHL-4细胞和Daudi细胞蛋白表达变化见图4A、图4B示。利妥昔单用Caspase-3活化不明显,SAHA单用可以诱导Caspase-3表达增加,相应的其底物PARP剪切成89KD的片段,不能发挥正常功能,导致细胞凋亡,利妥昔和SAHA合用时这种效应更明显。因此,利妥昔诱导B淋巴瘤细胞系凋亡无需激活的Caspases参与,而SAHA诱导B淋巴瘤细胞系凋亡通过激活的Caspases进行,这也可以部分解释两者协同作用的机制。BCL-XL是BCL-2家族的重要的凋亡抑制因子,可通过稳定线粒体膜通透性,减少凋亡因子的释放,抑制细胞凋亡。利妥昔和SAHA可以下调BCL-XL蛋白表达,合用组BCL-XL的下调更明显,从而促进淋巴瘤细胞凋亡(图4A和图4B)。
NF-κB是一个信号传导家族,多以异源性二聚体形式发挥作用,在细胞核内调节与细胞恶性转化、免疫以及炎症反应有关的许多基因的表达。BCL-XL是NF-κB的靶基因,NF-κB激活可上调BCL-XL的表达。在利妥昔(20μg/ml)联合SAHA(2.5μM)应用48小时可抑制NF-κB的表达(图5A)。在Daudi细胞中,核蛋白胶电泳转移检测进一步证实两者合用可导致NF-κB转录活性的减低(图5B)。
综上所述,抗CD20单克隆抗体利妥昔与组蛋白去乙酰化酶抑制剂合用能够抑制NF-κB活性,下调BCL-XL表达,协同抑制淋巴瘤细胞凋亡,可能成为B细胞淋巴瘤的又一种有效治疗方法。
Claims (4)
1、一种治疗B细胞淋巴瘤的药物组合物,其特征在于该药物由利妥昔和SAHA组成。
2、如权利要求1所述的药物组合物,其特征在于利妥昔用量为1-100μg/ml,SAHA用量为1-10μM。
3、如权利要求1所述的药物组合物,其特征在于利妥昔用量为1-50μg/ml,SAHA用量为1-5μM。
4、如权利要求1所述的药物组合物,其特征在于利妥昔用量为20μg/ml,SAHA用量为2.5μM。
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CN103169807A (zh) * | 2013-04-11 | 2013-06-26 | 太仓市胜舟生物技术有限公司 | 一种中西组合药物在制药中的应用 |
CN110496223A (zh) * | 2018-05-17 | 2019-11-26 | 复旦大学附属肿瘤医院 | 一种治疗非霍奇金氏淋巴瘤的药物组合物 |
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CN102264368A (zh) * | 2008-12-22 | 2011-11-30 | 米伦纽姆医药公司 | 极光激酶抑制剂与抗cd20抗体的组合 |
CN102264368B (zh) * | 2008-12-22 | 2014-09-10 | 米伦纽姆医药公司 | 极光激酶抑制剂与抗cd20抗体的组合 |
US10391100B2 (en) | 2008-12-22 | 2019-08-27 | Millennium Pharmaceuticals, Inc. | Combination of aurora kinase inhibitors and anti-CD20 antibodies |
CN103169807A (zh) * | 2013-04-11 | 2013-06-26 | 太仓市胜舟生物技术有限公司 | 一种中西组合药物在制药中的应用 |
CN110496223A (zh) * | 2018-05-17 | 2019-11-26 | 复旦大学附属肿瘤医院 | 一种治疗非霍奇金氏淋巴瘤的药物组合物 |
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