CN117442632A - 罗汉果苷v在制备改善阿尔兹海默病学习记忆能力的药物中的应用 - Google Patents
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Abstract
本发明公开了罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用,具体是罗汉果苷V通过减少淀粉样蛋白前体蛋白在制备改善阿尔兹海默病学习记忆能力的药物中的应用。本发明研究表明,罗汉果苷V能显著减少APP蛋白的表达水平、能有效改善AD小鼠的运动能力、能有效改善AD小鼠的学习记忆能力。
Description
【技术领域】
本发明属于治疗阿尔兹海默病药物技术领域,涉及罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用,具体是罗汉果苷V通过减少淀粉样蛋白前体蛋白在制备改善阿尔兹海默病学习记忆能力的药物中的应用。
【背景技术】
阿尔茨海默病(Alzheimer’s disease,AD)是一种发生于脑部、以渐进性的认知和记忆障碍、人格异常为主要特征的常见的神经退行性疾病,占老年痴呆的60%~80%,并且被认为是世界上第六大死亡原因。目前,已经确定了20多种促进疾病进展的病理因素。三个重要的假说被认为是AD病理学的根本原因,其包括乙酰胆碱缺乏、淀粉样β老年斑的形成和tau蛋白过度磷酸化。除这些关键因素外,病理因素如载脂蛋白E(APOE)、糖原合成酶激酶3β、Notch信号通路、Wnt信号通路等,被认为在AD的进展中起作用,但目前的AD治疗只对疾病早期的认知和功能下降提供有限的缓解,迄今尚无治愈方法,且会导致一系列不良反应,全球抗AD药物在临床中屡遭失败,临床成功率极低,作用于单一途径的药物都不太可能减轻导致AD的复杂病理级联反应,有必要探索新的治疗途径、研发新药物。
β淀粉样蛋白沉积斑块是由脑组织胞间β淀粉样蛋白沉积形成的,其形成的原因是由于基因突变(已知相关基因有Lys670-Asn,Met671-Leu基因等)导致β淀粉样蛋白的前体蛋白(amyloid precursor protein,APP)的结构和功能发生改变,导致脑脊液中长期含有高浓度的β淀粉样蛋白,在物理沉降和蛋白质凝结作用下形成斑块状沉淀。遗传学、生物化学和行为学研究表明,由连续淀粉样前体蛋白(APP)蛋白水解产生的神经毒性Aβ肽是AD发展的关键步骤。APP是一种在脑内高水平表达的单次跨膜蛋白,通过一系列连续的蛋白酶以快速和高度复杂的方式代谢,包括膜内γ-分泌酶复合物,其还处理其他关键调节分子。
罗汉果(Siraitia grosvenorii)是一种发现于中国南部地区著名的食药用植物。Mogroside I、III、IV和V是从罗汉果中提取的一组具有药理生物活性的三萜类成分,具有抗氧化、抗高血糖、免疫、镇咳和抗细胞毒活性。罗汉果苷V(Mogroside V,MV)是研究最充分和最常见的形式之一,已被报道可减轻炎症和高反应性,并抑制高血糖诱导的肺癌细胞迁移和侵袭。MV在中枢神经系统疾病中的保护作用日益受到人们的关注。在非竞争性NMDA受体拮抗剂地佐西平MK801诱导的类精神分裂症小鼠模型中,MV可以通过促进神经突生长、抑制细胞凋亡和[Ca2+]i释放减少来拯救精神分裂症相关的行为表型。
因此,研究MV是否能够通过减少淀粉样蛋白前体蛋白改善阿尔兹海默症学习记忆能力的作用,具有很好的市场前景。
【发明内容】
针对目前的阿尔茨海默病治疗只对疾病早期的认知和功能下降提供有限的缓解,迄今尚无治愈方法,且会导致一系列不良反应,本发明提供了罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用,具体是罗汉果苷V(简称MV)通过减少淀粉样蛋白前体蛋白在制备改善阿尔兹海默病学习记忆能力的药物中的应用。
本发明的目的通过以下技术方案来实现:
罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用。
进一步的,所述的罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用,具体是罗汉果苷V通过减少淀粉样蛋白前体蛋白在制备改善阿尔兹海默病学习记忆能力的药物中的应用。
进一步的,所述的罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用,所述药物是药物组合物,是以罗汉果苷V为主要活性成分,加上药学中可接受的辅料或辅助性成分制备成临床上可接受的药物制剂,所述的罗汉果苷V在药物组合物中的含量通常为0.01-95.0%(w/w)。
通常而言,作为药物,均是在制备成制剂后才临床应用。本发明所述的药物,作为药物组合物可根据本领域公知的方法制备,可通过将本发明药物与一种或多种药学上可接受的固体或液体赋形剂和/或辅剂结合,制成适于人或动物使用的任何剂型。
进一步的,所述的罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用,所述药物制剂包括口服制剂和注射制剂两种剂型。
进一步的,所述的罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用,所述口服制剂为口服胶囊,所述注射制剂为静脉注射液。
本发明所述药物或药物组合物可以单位剂量形式给药,给药途径可为肠道或非肠道,如口服、静脉注射、肌肉注射、皮下注射、鼻腔、口腔粘膜、眼、肺和呼吸道、皮肤、阴道、直肠等。
给药剂型可以是液体剂型、固体剂型或半固体剂型。液体剂型可以是溶液剂(包括真溶液和胶体溶液)、乳剂(包括o/w型、w/o型和复乳)、混悬剂、注射剂(包括水针剂、粉针剂和输液)、滴眼剂、滴鼻剂、洗剂和搽剂等;固体剂型可以是片剂(包括普通片、肠溶片、含片、分散片、咀嚼片、泡腾片、口腔崩解片)、胶囊剂(包括硬胶囊、软胶囊、肠溶胶囊)、颗粒剂、散剂、微丸、滴丸、栓剂、膜剂、贴片、气(粉)雾剂、喷雾剂等;半固体剂型可以是软膏剂、凝胶剂、糊剂等。
本发明药物可以制成普通制剂、也可以制成缓释制剂、控释制剂、靶向制剂及各种微粒给药系统。为了将本发明药物制成片剂,可以广泛使用本领域公知的各种赋形剂,包括稀释剂、黏合剂、润湿剂、崩解剂、润滑剂、助流剂。稀释剂可以是淀粉、糊精、蔗糖、葡萄糖、乳糖、甘露醇、山梨醇、木糖醇、微晶纤维素、硫酸钙、磷酸氢钙、碳酸钙等;润湿剂可以是水、乙醇、异丙醇等;黏合剂可以是淀粉浆、糊精、糖浆、蜂蜜、葡萄糖溶液、微晶纤维素、阿拉伯胶浆、明胶浆、羧甲基纤维素钠、甲基纤维素、羟丙基甲基纤维素、乙基纤维素、丙烯酸树脂、卡波姆、聚乙烯吡咯烷酮、聚乙二醇等;崩解剂可以是干淀粉、微晶纤维素、低取代羟丙基纤维素、交联聚乙烯吡咯烷酮、交联羧甲基纤维素钠、羧甲基淀粉钠、碳酸氢钠与枸橼酸、聚氧乙烯山梨糖醇脂肪酸酯、十二烷基磺酸钠等;润滑剂和助流剂可以是滑石粉、二氧化硅、硬脂酸盐、酒石酸、液体石蜡、聚乙二醇等。
还可以将片剂进一步制成包衣片,例如糖包衣片、薄膜包衣片、肠溶包衣片,或双层片和多层片。
为了将给药单元制成胶囊剂,可以将有效成分本发明药物与稀释剂、助流剂混合,将混合物直接置于硬胶囊或软胶囊中。也可将有效成分本发明药物先与稀释剂、黏合剂、崩解剂制成颗粒或微丸,再置于硬胶囊或软胶囊中。用于制备本发明药物片剂的各稀释剂、黏合剂、润湿剂、崩解剂、助流剂品种也可用于制备本发明药物的胶囊剂。
为将本发明药物制成注射剂,可以用水、乙醇、异丙醇、丙二醇或它们的混合物作溶剂并加入适量本领域常用的增溶剂、助溶剂、pH调剂剂、渗透压调节剂。增溶剂或助溶剂可以是泊洛沙姆、卵磷脂、羟丙基-β-环糊精等;pH调剂剂可以是磷酸盐、醋酸盐、盐酸、氢氧化钠等;渗透压调节剂可以是氯化钠、甘露醇、葡萄糖、磷酸盐、醋酸盐等。如制备冻干粉针剂,还可加入甘露醇、葡萄糖等作为支撑剂。
此外,如需要,也可以向药物制剂中添加着色剂、防腐剂、香料、矫味剂或其他添加剂。
和现有技术相比,本发明具有如下优点:
1、本发明所述的罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用,研究发现罗汉果苷V通过减少淀粉样蛋白前体蛋白来改善阿尔兹海默病学习记忆能力。
2、本发明所述的罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用,实验研究发现,通过水迷宫实验、旷场实验及细胞实验检测结果证明,MV对阿尔兹海默病模型小鼠的学习记忆能力及运动能力具有明显的改善作用,同时,在阿尔兹海默病细胞模型中发现,MV可以明显减少淀粉样蛋白前体蛋白的表达。
3、本发明所述的罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用,研究发现MV作为来源于纯天然的食药用植物罗汉果的主要成分之一,具有抗氧化、抗高血糖、免疫、镇咳等作用,对胃肠道等身体其他部位的不良反应较小。
4、本发明所述的罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用,作为来源于纯天然的食药用植物罗汉果的主要成分之一,MV的来源充足,因此用药成本较低。
【附图说明】
图1是本发明实验例中罗汉果苷V显著减少APP蛋白的表达水平的图;
图2是本发明实验例中罗汉果苷V有效改善AD小鼠的运动能力的图;
图3是本发明实验例中罗汉果苷V有效改善AD小鼠的学习记忆能力的图。
【具体实施方式】
以下结合实施例对本发明的具体实施方式做进一步说明。
实施例1:
罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用:
按照现有的工艺要求,制备成硬胶囊。
实施例2:
罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用:
按照现有的工艺要求,制备成注射剂。
实验例:
1、罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用:
2、材料与方法
2.1细胞培养与处理
含10%胎牛血清的DMEM/F12培养基(Gibco,New York,USA)培养过表达APP的人神经母细胞瘤细胞(SH-SY5Y-APP细胞),用于Western blotting检测;利用1μg/mL DOX诱导APP表达24h后,向过表达APP蛋白的细胞培养基中添加DMSO溶解的MV,使其终浓度分别为25μM、50μM和100μM;将细胞分为5个组,Blank组、APP组、MV25μM、MV50μM组和MV100μM组,用MV处理细胞48h,进行后续Western blotting检测;
2.2Western blotting实验
按照细胞质蛋白制备试剂盒(Applygen,北京,中国)的说明收集并裂解经MV不同浓度梯度处理的细胞;细胞被分离并聚集到不同的管中;使用BCA蛋白定量试剂盒(ThermoFisher Scientific,Massachusetts,USA)评估蛋白浓度;然后用SDS-PAGE分离各组分20μg蛋白,将蛋白转移到PVDF膜上;然后用5%脱脂奶粉封闭,分别加入抗APP、抗β-actin抗体,孵育过夜;将相应的荧光二抗与一抗室温结合1h;经过四次清洗后,于ODYSSEY成像系统(LI-COR,Nebraska,USA)帮助扫描膜;
2.3动物和处理
20只8月龄雄性转基因(APP/PS1)AD小鼠及10只雄性同窝对照小鼠购自江苏艾菱菲生物科技有限公司;本研究的所有实验均按照中国桂林医学院实验动物伦理委员会的指导原则进行;将小鼠分为Con组、AD组、MV干预组,每组各10只;DMSO溶解MV;基于MV药代动力学参数和优秀的生物利用度,对MV干预组小鼠以2.5mg/kg的剂量进行MV灌胃4周,Con组及AD组进行相同体积生理盐水灌胃4周;灌胃结束后,采用旷场实验记录小鼠平均运动速度,评价小鼠自主运动能力,利用水迷宫实验检测小鼠上台潜伏期评价小鼠空间学习记忆能力;
2.4行为学训练及检测
2.4.1旷场实验
MV灌胃4周后进行旷场实验;旷场实验:记录小鼠在50cm x 50cm x 50cm旷场箱内自由运动10min的运动轨迹及平均运动速度;
2.4.2水迷宫实验
利用上海欣软信息科技有限公司Morris水迷宫(Morris water maze,MWM,XR-XM101),沿着池边的四个极点将水箱均分成4个象限,将一个隐藏平台放置在一个象限的中点,进行连续5天的定位航行实验,将小鼠放入水箱,记录小鼠找到平台的时间,即为逃避潜伏期,每只小鼠每天训练3次,每次最多持续60s,60s内末找到平台的小鼠被引导到平台,停留20s,逃避潜伏期记录为60s;
2.5统计分析
数据以均数±标准差表示;使用GraphPad Prism软件9.0(GraphPad,California,USA)进行统计分析;采用单因素方差分析(One-way ANOVA)进行组间差异评估,然后采用Tukey的多重比较检验;P<0.05认为有统计学意义;
3、结果
3.1MV显著减少APP蛋白的表达水平
Western blotting实验结果显示,与Blank组相比,DOX诱导后,APP蛋白出现明显过表达;与DOX诱导的APP组相比,不同浓度MV处理的SH-SY5Y-APP细胞48小时后,APP单纯蛋白表达明显下降,且成浓度依赖性下降,其中,100μM MV处理组细胞中APP蛋白表达显著下降(P<0.05)(图1);
图1MV显著减少APP蛋白的表达水平;
A Western blotting实验结果显示APP及β-actin蛋白表达条带结果;B对APP及β-actin蛋白条带的灰度扫描结果;Blank:未添加DOX;APP:添加DOX;MV25:添加DOX 24h后进行25μM MV处理细胞;MV50:添加DOX 24h后进行50μM MV处理细胞;MV100:添加DOX 24h后进行100μM MV处理细胞;n=3,*p<0.05,****p<0.0001;
3.2MV有效改善AD小鼠的运动能力
采用旷场实验评估动物的自主运动能力,与对照组相比,AD组小鼠在记录时间内平均运动速度下降,而MV干预的AD小鼠平均运动速度明显得到恢复(图2);
图2MV有效改善AD小鼠的运动能力;
旷场实验记录小鼠10min的平均运动速度统计结果;Con:同窝对照小鼠;AD:生理盐水灌胃的AD小鼠;MV:MV灌胃的AD小鼠;n=10,**p<0.01;
3.3MV有效改善AD小鼠的学习记忆能力
采用水迷宫实验评估小鼠的学习记忆能力,与对照组相比,AD小鼠逃避潜伏期显著增加(P<0.05);与AD小鼠相比,MV组小鼠逃避潜伏期显著降低(P<0.05)(图3)表明其学习记忆能力明显改善;
图3MV有效改善AD小鼠的学习记忆能力;
水迷宫实验小鼠的上台潜伏期;n=10,AD与WT相比,****p<0.0001;AD与AD-MV相比,##P<0.01。
上述说明是针对本发明较佳可行实施例的详细说明,但实施例并非用以限定本发明的专利申请范围,凡本发明所提示的技术精神下所完成的同等变化或修饰变更,均应属于本发明所涵盖专利范围。
Claims (5)
1.罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用。
2.罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用,其特征在于:罗汉果苷V通过减少淀粉样蛋白前体蛋白在制备改善阿尔兹海默病学习记忆能力的药物中的应用。
3.根据权利要求1所述的罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用,其特征在于:所述的药物是药物组合物,是以罗汉果苷V为主要活性成分,加上药学中可接受的辅料或辅助性成分制备成临床上可接受的药物制剂,所述的罗汉果苷V在药物组合物中的含量通常为0.01-95.0%w/w。
4.根据权利要求3所述的罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用,其特征在于:所述药物制剂包括口服制剂和注射制剂两种剂型。
5.根据权利要求4所述的罗汉果苷V在制备改善阿尔兹海默病学习记忆能力的药物中的应用,其特征在于:所述口服制剂为口服胶囊,所述注射制剂为静脉注射液。
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