CN104998250B - 一种恩替卡韦与甘露聚糖肽药物组合物及其制备方法 - Google Patents
一种恩替卡韦与甘露聚糖肽药物组合物及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种恩替卡韦与甘露聚糖肽药物组合物及其制备方法,所述组合物,可以抑制病毒复制再生的药物、增强人体免疫力,并且疗效显著、没有任何交叉作用、安全性高,具有更好的抗病毒能力,可增强患者的免疫力和增强肝细胞再生的功能。
Description
技术领域
本发明涉及医药领域,更具体地,涉及恩替卡韦与甘露聚糖肽的药物组合物及其制备方法。
背景技术
乙型病毒性肝炎是乙型肝炎病毒(HBV)持续感染引起的肝脏炎症坏死的疾病。乙型肝炎病毒一般无直接细胞毒作用,慢性HBV感染的动态过程包括病毒、宿主的免疫状态和肝细胞之间互相作用,其感染的主要机制虽尚未完全明确,但大体认为与机体免疫功能低下相关,感染HBV后出现免疫应答或免疫调节功能紊乱,进而导致肝脏损伤。其严重的临床结局是失代偿期肝硬化和原发性肝癌。故研究乙型肝炎的治疗意义重大。
恩替卡韦,化学名9-[(1S,3R,4S)-4-羟基-3-(羟甲基)-2-亚甲基环戊烷]鸟嘌呤一水合物,其化学结构式如下:
恩替卡韦(Entecavir)是一种脱氧鸟嘌呤核苷类似物,2005年美国FDA批准用于对乙肝治疗。在体内通过聚合酶的引导、从前基因到负链的转录和DNA正链的合成等三个环节对乙肝病毒的复制起抑制作用。从理论上讲,在常用的核苷类似物中,拉米夫定、阿德福韦酯仅抑制一种酶,恩替卡韦抑制的是两种酶,作用更强,具有快速应答,显著改善临床症状,耐药率低的特点,近年来被广泛用于多种情况的乙肝患者,大大改善他们的生存和预后,且其对急、慢性乙型肝炎患者均有较好的疗效。
甘露聚糖肽为我国首创的新型免疫促进剂,是具有一定均一性的混合物,由不同链长的甘露聚糖肽分子构成。主要的组成氨基酸为天门冬氨酸、苏氨酸、丝氨酸、谷氨酸、丙氨酸和亮氨基酸,此外还有少量的甘氨酸、缬氨酸、异亮氨基酸、络氨酸、苯丙氨基酸、赖氨酸、精氨酸等。在动物实验和细胞水平上的研究中,甘露聚糖肽均可起到抑制肿瘤生长和促进免疫系统效果。尤其在免疫系统方面,甘露聚糖肽在一定剂量内促进吞噬细胞、K细胞和NK细胞发挥其免疫功能,增强体液免疫应答和免疫记忆功能,提高人们对一般疾病和各种病原性细菌、病毒等的抵抗力。因此,甘露聚糖肽可发挥调节免疫、抗病毒的作用,适用于免疫功能低下的各种疾病,比如免疫病理损害的慢性乙型肝炎。
乙型肝炎目前尚无特殊治疗方法,但在治疗上有一致的认识。由中华医学会肝病学分会中华医学会感染病学分会联合制订的《乙型肝炎防治指南》中明确指出:最大限度地长期抑制或消除HBV,减轻肝细胞炎症坏死及肝纤维化,延缓和阻止疾病进展,减少和防止肝脏失代偿、肝硬化、肝细胞癌及其并发症的发生,从而改善生活质量和延长存活时间。乙型肝炎治疗主要包括抗病毒、免疫调节、抗炎保肝等治疗,其中抗病毒治疗是关键。现有技术中没有将恩替卡韦和甘露聚糖肽合用的报道,本发明人将恩替卡韦和甘露聚糖肽组合应用,意外的发现两者具有协同增效作用。
发明内容
本发明的目的是提供一种既抗病毒又促进免疫的恩替卡韦与甘露聚糖肽新的药物组合物,本发明的恩替卡韦与甘露聚糖肽药物组合物,含有恩替卡韦和甘露聚糖肽,必要时可以加入药学上可接受的辅料。
本发明的药物组合物,其中恩替卡韦和甘露聚糖肽的重量比例为1:10-30.
本发明的药物组合物,可以是任意一种药物制剂形式,优选口服药物制剂,更优选为:片剂、胶囊剂、颗粒剂、粉剂、液体制剂。
本发明除了恩替卡韦和甘露聚糖肽外,还含有药学上可接受的的辅料:玉米淀粉作为填充剂和崩解剂;纤维素胶和预胶化淀粉作为增塑剂和粘合剂;明胶作为乳化剂、粘合剂和崩解剂;甘油作为矫味剂;羟丙纤维素作为水分散性材料;硬脂酸镁或硬脂酸锌、滑石粉、硅粉等作为润滑剂;微晶纤维素作为粘合剂和崩解剂;交联羧甲纤维素钠作为粘合剂和崩解剂;乳糖作为填充剂和粘合剂;阿拉伯胶作为乳化剂和粘合剂;硬脂酸作为乳化剂和粘合剂,甲基羟丙纤维素作为粘合剂和崩解剂;蔗糖作为矫味剂;聚乙二醇作为填充剂、乳化剂和崩解剂;变性食用淀粉作为填充剂和崩解剂;豆油和卵磷脂等作为脂溶性的辅助性物质;二氧化钛用作着色剂等。
本发明给药方式:片剂、胶囊制剂可以每日口服1-3次。
本发明用于实现上述技术目的技术方案如下:药物组合物片剂,该片剂包含恩替卡韦0.5份、甘露聚糖肽5~15份、乳糖80~90份、微晶纤维素9~15份、交联羧甲基纤维素钠0.5~5份、硬脂酸镁0.5~5份。
药物组合物胶囊,该胶囊包含恩替卡韦0.5份、甘露聚糖肽5~15份、乳糖40~60份、微晶纤维素10~40份、微粉硅胶0.5~2份、硬脂酸镁2~5份。
本发明中的片剂和包衣片生产:一般先将相应重量份的恩替卡韦、甘露聚糖肽和一种或两种赋形剂采用湿法生产工艺,或干法生产工艺进行均匀混合。混合过程可以是制粒混合、腾涌混合、掺合混合等。混匀的混合物经压片而成片剂。将包衣液喷至片剂得包衣片。
本发明中的硬胶囊生产:一般先将相应重量份恩替卡韦、甘露聚糖肽、乳糖、微晶纤维素、微粉硅胶过筛并干燥;将乳糖、微晶纤维素和微粉硅胶混合均匀,然后将恩替卡韦、甘露聚糖肽与其混合均匀;用干法生产工艺制粒,所得的颗粒加入相应重量份的硬脂酸镁,混合均匀,得混合粒;用空心胶囊填充得恩替卡韦甘露聚糖肽药物组合物胶囊。
本发明药物组合物制剂,和单独使用每个单一的抗病毒药物相比,不仅具有抗病毒能力,还能增强患者的免疫力,具有很好的协同作用和药理活性。
以下通过实验数据进一步说明本发明的有益效果:
药物组合物治疗乙肝的动物实验-对乙肝病毒的抑制作用
试验用小鸭保持正常光照,喂食标准食物,三天大的小鸭用1.5×107基因当量的鸭乙肝病毒通过静脉注射感染。感染三天后开始使用表1的药物组合物制剂处方1、处方3、处方5和恩替卡韦治疗,每组三只鸭子包括对照组。监测小鸭血清中病毒DNA的水平变化,测量使用分支链DNA信号放大技术,三只鸭的鸭乙肝病毒DNA(pg/ml)的平均值列入表1。试验用药量为人用药量十倍(mg/Kg),给药共28天。
表1 小鸭血清中乙肝病毒DNA的水平变化(pg/ml,单位为千)
结果显示,单用恩替卡韦或甘露聚糖肽抑制乙肝病毒效果均明显弱于药物组合物,停药后,又有乙肝病毒大量出现,在32-34天。
药物组合物制剂治疗乙肝的动物试验-增高肝细胞的更新率
试验用鸭为天生感染乙肝的三至四个月大的鸭子,保持正常光照,卫视标准食物。分别使用处方4、恩替卡韦治疗35天,且分别在用药前和治疗后进行肝活组织检查。肝组织样品(0.07-0.1g)在0.01M Tris-HCl缓冲液(pH 7.5)-0.01M EDTA的介质中均质化后,利用分支链DNA信号放大技术定量分析方法测定1.0×106肝细胞中的细胞外乙型肝炎病毒DNA数(CCC DNA)。测量值以用药前作为100%,共三组鸭,每组六只包括对照组。正常化后的测量值(六只的平均值)列入表2。试验用药量为人用药量10倍(mg/Kg)。
表2 治疗前后肝脏内CCC DNA的变化情况
处方4 | 恩替卡韦 | 甘露聚糖肽 | 对照组 | |
治疗前 | 100% | 100% | 100% | 100% |
治疗后 | 5.2% | 43% | 92% | 105% |
这个结果显示,本发明中的药物组合物能够增高肝细胞的更新率,即有提高肝细胞再生的能力,而单用恩替卡韦甘露聚糖肽没有这种功能。
增强免疫力的功能-体外细胞试验
本发明中的药物组合物制剂增强免疫力的功能用原发性人类肝细胞试验,细胞在有药物组合物制剂和无药物组合物制剂的条件下同时用50倍基因当量的乙肝病毒感染十四个小时。试验是在外加了3.5×10-6氢化可的松琥珀酸酯,2%DMSO,5%成年人血清和5%胎牛血清的H介质中进行。感染完成后,用介质洗去所有的药物组合物制剂,然后每两天换一次介质,用定量ELISA仪器测量感染后第十二天细胞所分泌的HBsAg的量。每一种处方有一个无药物组合物制剂的对照样和八个平行样,HBsAg的量为八个样品的平均值。药物组合物制剂的用量以处方中的硫辛酸计(用药中硫辛酸量是38μM)。
表3 测得的乙肝表面抗原(HBsAg)分泌量
空白 | 处方1 | 处方2 | 处方3 | 处方4 | 处方5 | |
HBsAg(ng/ml) | 25.3 | 6.7 | 4.2 | 21.8 | 3.9 | 2.6 |
这项试验结果显示,本发明中的药物组合物制剂具有良好的免疫力增强的功能。
具体实施方式
下面结合实施例进一步说明本发明,对本发明作进一步地描述。
实施例1恩替卡韦与甘露聚糖肽药物组合物制剂处方配比
表1:治疗病毒性乙肝恩替卡韦与甘露聚糖肽药物组合物制剂的处方配比,其既可用于片剂也可用于硬胶囊。
固体剂型的一般生产方法如下所示:
1、配比的恩替卡韦、甘露聚糖肽和赋形剂一起混匀;
2、步骤1得到的均匀物进一步压紧成小颗粒;
3、将润滑剂如硬脂酸镁等和上述步骤2所得的小颗粒混合;
4、步骤3的混匀物压制成片剂或其他固体剂型;
5、若需要,可将包衣液呈雾状液滴喷至步骤4所得片剂上。
若采用硬胶囊制剂时,则把步骤3得到的均匀物直接进行用空心胶囊填充。
表4 恩替卡韦与甘露聚糖肽药物组合物制剂处方配比(每粒用量,mg)
实施例2药物组合物片剂的处方和制备
处方
制备方法:按处方量称取各组分,充分混合均匀,制粒,压片机压片。
实施例3药物组合物胶囊的处方和制备
处方
制备方法:按处方量称取各组分,过筛并干燥,充分混合均匀,制粒,用空心胶囊填充得药物组合物胶囊。
Claims (5)
1.一种恩替卡韦与甘露聚糖肽药物组合物,其活性成分由恩替卡韦和甘露聚糖肽组成,其中恩替卡韦和甘露聚糖肽的重量比例为1:10-20。
2.根据权利要求1所述的药物组合物,其特征在于,该药物组合物制备成以下剂型的药物制剂,选自:片剂、胶囊剂、颗粒剂、粉剂、液体制剂。
3.根据权利要求2所述的药物组合物,其特征在于,按重量份数计,所述片剂由恩替卡韦0.5份、甘露聚糖肽5~10份、乳糖80~90份、微晶纤维素9~15份、交联羧甲基纤维素钠0.5~5份、硬脂酸镁0.5~5份组成。
4.根据权利要求2所述的药物组合物,其特征在于,按重量份数计,所述胶囊剂由恩替卡韦0.5份、甘露聚糖肽5~10份、乳糖40~60份、微晶纤维素10~40份、微粉硅胶0.5~2份、硬脂酸镁2~5份组成。
5.根据权利要求1所述的药物组合物在制备治疗病毒型乙肝的药物中的应用。
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