CN104922176B - 一种野菊花提取物的应用 - Google Patents
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Abstract
本发明公开了一种野菊花提取物的应用,所述野菊花提取物中含有蒙花苷,蒙花苷的质量百分数不小于50%,所述应用为,将野菊花提取物用于预防或治疗高尿酸血症。本发明结合野菊花提取物中蒙花苷能降低黄嘌呤氧化酶活性的特性,将其用于预防或治疗高尿酸血症,可显著降低模型大鼠血清尿酸水平,并可降低血清肌酐、尿素氮的水平,具有成分易于分离、质量可控、使用剂量小、作用显著等优点,对于改善人类健康具有重大而深远的意义。
Description
技术领域
本发明属于医药技术领域,本发明涉及野菊花提取物(蒙花苷含量不少于50%)在预防和/或防治高尿酸血症中的应用,可以明显降低高尿酸血症大鼠血清中的尿酸值。
背景技术
野菊花为菊科菊属多年生草本植物野菊(Chrysanthemum indicum L.)的干燥头状花序,又名“苦薏”、“山野菊”、“路边菊”、“野黄菊”。野菊花为传统用药,《名医别录》中记载:“苦、辛、微寒”,具有“清热解毒、平肝”之功效。《本草纲目》中也有记载:野菊花清热解毒、泻火明目、利咽疏肝。经现代研究发现,野菊花之所以能“通关窍、利滞气”,主要是其含有微量龙脑、樟脑和菊油环酮等挥发油。现代研究表明,野菊花具有许多方面的药理活性:心肌保护、降压降脂、抗氧化、抗血小板聚集、抗炎以及抑菌和抗病毒等作用。临床上主要用于治疗痈毒疖肿、高血压、湿疹、丹毒、宫颈炎、肺炎、呼吸道炎症等。蒙花苷是一类天然黄酮类化合物。蒙花苷及其衍生物在植物界分布广泛,存在于许多植物的花、叶、果实中,多以苷的形式存在在植物中分布广泛,目前发现主要存在于甘松、杭白菊、野菊花、密蒙花、小蓟、大蓟、蜘蛛香等植物中。近年来的研究发现其具有很高的生物活性,如预防和改善糖尿病、抗菌、抗病毒、抗肿瘤、抗衰老、抗缺氧、抗疲劳、抑制血糖升高、抑制血小板聚集和抑制磷酸二酯酶等。而我国野菊花资源丰富,蒙花苷的来源也较丰富,因其有较高的药用保健价值,疗效确切,有着良好的开发潜力和基础。
高尿酸血症(Hyperuricemia,HUA)是一组以遗传性和(或)获得性引起尿酸排泄减少和(或)体内嘌呤代谢障碍,导致血尿酸增高的一种疾病。临床上把任何原因引起的尿酸生成增多和/或排泄减少,导致血尿酸浓度升高,即男性和绝经后女性的血尿酸浓度大于420μmol/L(7.0mg/dL),绝经前女性的血尿酸浓度大于350μmol/L(5.8mg/dL)称为高尿酸血症。随着社会经济的发展,人们生活水平提高了,生活方式改变了,高尿酸血症的发病率在逐年升高(10%以上),但是高尿酸血症的早期无症状,仅有血尿酸持续性或波动性增高,从血尿酸升高至症状出现的时间可长达数年至数十年,有些可能终身不会出现症状,所以往往不被重视。在几万年的进化过程中,人类基因发生突变失去了尿酸酶的功能,仅靠肾脏的排泄和机体尿酸池的动态平衡来维持血尿酸的稳定,也表明机体具有强大的代偿功能。但现今随着生活方式的改变,机体产生的尿酸增多,在肾功能正常的人体,推测机体可能通过增加尿尿酸的排泄和增加尿酸池的容量(组织沉积)来代偿。长期代偿而导致肾功能损伤后,这种代偿能力会下降,尿尿酸的排泄量减少,组织的沉积进一步增多。此时,需要依靠药物的治疗来促进抑制尿酸的生成或尿酸的排泄。
现代医学根据成因将高尿酸血症分为生成增多型和排泄减少型,并依据肾功能情况选用抑制尿酸生成药如别嘌醇,或促进尿酸排泄药如苯溴马隆、丙磺舒、苯磺唑酮。尽管这些药物有明显的降尿酸作用,但副作用也较大,如皮疹、发热、肝肾功能障碍、造血功能异常、痛风发作等,因而限制了其应用的范围。因此,开发研究药效明确且安全的新型抗高尿酸血症药物十分必要。
发明内容
本发明的目的在于针对现有技术的不足,提供一种野菊花提取物的应用。
本发明的目的是通过以下技术方案实现的:一种野菊花提取物的应用,其特征在于,所述野菊花提取物中含有蒙花苷,蒙花苷的质量百分数不小于50%,所述应用为,将野菊花提取物用于预防或治疗高尿酸血症。
本发明的原理是:本发明的应用主要是通过蒙花苷抑制黄嘌呤氧化酶(XOD)活性的特性来进行预防或治疗高尿酸血症。
本发明的有益效果在于:本发明结合野菊花提取物中蒙花苷抑制黄嘌呤氧化酶(XOD)活性的特性,将其用于预防或治疗高尿酸血症,可显著降低模型大鼠血清尿酸水平,并可降低血清肌酐、尿素氮的水平,对于改善人类健康具有重大而深远的意义。
具体实施方式
一种野菊花提取物的应用,所述野菊花提取物中含有蒙花苷,蒙花苷的质量百分数不小于50%,所述应用为,将野菊花提取物用于预防或治疗高尿酸血症。该应用是利用了蒙花苷抑制黄嘌呤氧化酶(XOD)活性的特性进行降尿酸的,从而来预防或治疗高尿酸血症。
本发明研究人员采用正常雄性SD大鼠高嘌呤饲料边造模边灌胃给药,先高嘌呤饲料造模后给药2种方式,以SD大鼠血清尿酸、肌酐、尿素氮、黄嘌呤氧化酶等为指标,发现野菊花提取物(约含蒙花苷60%)能显著降低高尿酸血症大鼠血清UA、BUN、CR水平,降低血清XOD活性。
本发明药物是从中药野菊花中提取得到的野菊花提取物(约含蒙花苷60%)。药品制备野菊花提取物可以与药学上认可的辅料组成片剂、颗粒剂、丸剂、胶囊剂、散剂、口服液等各种剂型。食品制备野菊花提取物可以小剂量添加在各种允许添加量的保健食品中。
下面结合实施例对本发明作进一步说明。
实施例1:野菊花提取物的制备(现有技术)。
(1)野菊花2.5kg,加入10倍重量的质量分数为75%酒精,100℃提取三次,每次1h,微压,后浓缩至浸膏;
(2)加入质量分数为20%酒精1-2L,50-60℃溶解,离心取沉淀;
(3)加入300ml乙醚清洗两-三次至无色,后加入300ml乙酸乙酯溶解一次,离心取沉淀;
(4)用乙酸乙酯/乙醇(240ml:60ml)的混合溶液清洗一次,后200ml以下无水乙醇清洗一次;
(5)加入1L质量分数为40%乙醇,80℃溶解,趁热离心取沉淀后干燥,即 得到野菊花提取物,其中的蒙花苷的质量百分数不小于50%。
实施例2:药效学实验
一、预防性给药
动物分组:清洁级雄性SD大鼠40只,普通饲料适应性喂养14天后,玻璃毛细管大鼠眼底静脉丛采血,离心取上清液,根据实验动物血清尿酸值随机分为4组,分别为正常对照组、模型对照组、阳性药(别嘌醇)组、野菊花提取物(Chr.E)组(80mg/kg),每组10只。各组之间基础血清尿酸值无显著差异(P>0.05)。除正常组给予普通饲料外,其余各组每天给予含酵母膏和腺嘌呤的饲料,实验期间自由采食饮水。
病理模型:除正常组给予普通饲料外,其余各组每天给予含酵母膏和腺嘌呤的饲料。高嘌呤饲料的配制:参照文献方法制备高嘌呤饲料,将酵母膏、腺嘌呤分别以10%和0.1%的含量均匀拌入粉碎的大鼠颗粒饲料中,重新压粒成型即为高嘌呤饲料。
给药方式:造模同时,各组分别给予相应药物灌胃,1ml/100g体重,每日一次,连续给药4周。正常对照组及模型对照组给予相应体积的蒸馏水。
检测指标:每2周大鼠禁食不禁水12h,玻璃毛细管大鼠眼底静脉丛采血,分离血清,全自动生化仪检测血清中尿酸(UA)、尿素氮(BUN)、肌酐(CR)的含量,试剂盒检测血清XOD的活性。
统计分析:计量资料数据以表示,组间比较采用t-test检验。
从表1可见,造模给药2周后,与正常对照组比较,模型对照组大鼠血清UA有一定升高趋势,但无显著差异。
表1造模给药2周后野菊花提取物对大鼠血清尿酸及相关指标水平的影响(n=10)
注:与正常对照组比较,△P<0.05,△△P<0.01;与模型对照组比较,*P<0.05,**P<0.01
从表2可见,造模给药4周后,与正常对照组比较,模型对照组大鼠血清UA显著升高(P<0.01),血清XOD显著升高(P<0.01);血清BUN、CR均有一定的升高趋势,但无显著性差异;与模型对照组比较,野菊花提取物组血清UA、BUN、CR、XOD值均显著降低(P<0.05)。
表2造模给药4周后野菊花提取物对大鼠血清尿酸及相关指标水平的影响(n=10)
注:与正常对照组比较,△P<0.05,△△P<0.01;与模型对照组比较,*P<0.05,**P<0.01
二、治疗性给药
动物分组:取第一部分实验中停药2周后的雄性SD大鼠60只,除正常组给予普通饲料外,其余各组每天给予高嘌呤饲料,实验期间自由饮水,玻璃毛细管大鼠眼底静脉丛采血,离心取上清液,根据实验动物血清尿酸值随机分为6组,分别为正常对照组、模型对照组、阳性药(别嘌醇)组,Chr.E高剂量组(60mg/kg)、Chr.E中剂量组(30mg/kg)、Chr.E低剂量组(15mg/kg),每组10只。模型对照组、阳性药(别嘌醇)组,Chr.E高剂量组(60mg/kg)、Chr.E中剂量组(30mg/kg)、Chr.E低剂量组(15mg/kg)与正常组相比,血清UA显著升高(P<0.01)。
病例模型:除正常组给予普通饲料外,其余各组每天给予含酵母膏和腺嘌呤的饲料。高嘌呤饲料的配制:参照文献方法制备高嘌呤饲料,将酵母膏、腺嘌呤分别以10%和0.1%的含量均匀拌入粉碎的大鼠颗粒饲料中,重新压粒成型即为高嘌呤饲料。
给药方式:造模成功后,各组分别给予相应药物灌胃,1ml/100g体重,每日一次,连续给药7周。正常对照组及模型对照组给予相应体积的蒸馏水。
检测指标:给药后第3、7周大鼠禁食不禁水12h,玻璃毛细管大鼠眼底静脉丛采血,分离血清,全自动生化仪检测血清中尿酸(UA)、尿素氮(BUN)、肌酐(CR)的含量,试剂盒检测血清XOD的活性。
统计分析:计量资料数据以表示,组间比较采用t-test检验。
从表1可见,给药0周时,与正常对照组比较,造模各组大鼠血清UA、XOD显著升高(P<0.01),血清BUN、CR有升高趋势,但无显著差异。
表1给药0周时野菊花提取物对大鼠血清尿酸及相关指标水平的影响(n=10)
注:与正常对照组比较,△P<0.05,△△P<0.01;与模型对照组比较,*P<0.05,**P<0.01
从表2可见,给药3周后,与正常对照组比较,模型对照组大鼠血清UA显著升高(P<0.01);与模型对照组比较,各给药组大鼠血清UA、CR、BUN值无明显统计学差异。
表2给药3周后野菊花提取物对大鼠血清尿酸及相关指标水平的影响(n=10)
注:与正常对照组比较,△P<0.05,△△P<0.01;与模型对照组比较,*P<0.05,**P<0.01
从表3可见,给药7周后,与正常对照组比较,模型对照组大鼠血清UA、XOD显著升高(P<0.01);与模型对照组比较,Chr.E高剂量组(60mg/kg)血清UA、XOD水平显著降低(P<0.01)。
表3给药7周后野菊花提取物对大鼠血清尿酸及相关指标水平的影响(n=10)
注:与正常对照组比较,△P<0.05,△△P<0.01;与模型对照组比较,*P<0.05,**P<0.01 。
Claims (1)
1.一种野菊花提取物的应用,所述野菊花提取物的提取方法如下:
(1)野菊花2.5kg,加入10倍重量的质量分数为75%的酒精,100℃提取三次,每次1h,微压后浓缩至浸膏;
(2)加入质量分数为20%的酒精1-2L,50-60℃溶解,离心取沉淀;
(3)加入300ml乙醚清洗两-三次至无色,后加入300ml乙酸乙酯溶解一次,离心取沉淀;
(4)用240ml乙酸乙酯和60ml乙醇组成的混合溶液清洗一次,然后用200ml以下的无水乙醇清洗一次;
(5)加入1L 质量分数为40%乙醇,80℃溶解,趁热离心取沉淀后干燥,得到野菊花提取物;野菊花提取物中含有蒙花苷,蒙花苷的质量百分数不小于50%;
其特征在于,应用为:将野菊花提取物用于制备预防或治疗高尿酸血症的药物。
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