CN111920837A - 一种黄蜀葵花提取物及其在制备尿路感染药物中的应用 - Google Patents
一种黄蜀葵花提取物及其在制备尿路感染药物中的应用 Download PDFInfo
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Abstract
本发明涉及一种黄蜀葵花提取物及其在制备尿路感染药物中的应用,本发明的提取物具有良好的尿路感染如膀胱炎治疗活性,还具有明显抑制尿路充血以及水肿,尤其是膀胱充血以及膀胱水肿。
Description
技术领域
本发明涉及一种黄蜀葵花提取物及其在制备尿路感染药物中的应用,具体涉及一种黄蜀葵花提取物的制药用途。
背景技术
黄蜀葵花为锦葵科植物黄蜀葵Abelmoschus manihot(L.)Medic.的干燥花冠,其味甘、寒,归肾、膀胱经;具有清利湿热,消肿解毒功效。用于痈疽肿毒,水火烫伤。该药始载于《嘉佑本草》,《嘉佑本草》记载:黄蜀葵花,主诸恶疮脓水久不瘥者,作末敷。《本草纲目》曰:黄蜀葵花,其花气味甘、寒、滑、无毒,治诸恶疮脓水久不瘥者,作末敷之即愈,为疮家要药。《本草衍义》中述:“子临产时,取四十九粒,研烂,用温水调服,良久产。”《岭南采药录》记载:“消疮排脓用黄蜀葵根,捣烂敷;治疳疔痔疮时黄蜀葵根,煎水洗。”《本草纲目》亦云:“花、子与根性功相同,可以互用。无花用子,无子用根,治痈疽肿毒,无花,用根、叶亦可。”
尿路感染(Urinary tract infection,UTI)是指病原体在尿中生长繁殖,并侵犯尿道粘膜或组织而引起的炎症。其主要病因是机体抵抗力减弱时,由细菌感染引起的泌尿系统炎症性病变,常见致病菌有大肠杆菌、副大肠杆菌、变形杆菌等,其中90%的门诊病人,50%的住院病人其致病菌是大肠杆菌。在感染性疾病中,尿路感染的发病率占第二位,仅次于呼吸道感染。
中药治疗泌尿系感染,具有抗菌消炎,镇痛清热,利尿,调节免疫等多方面的药理作用,疗效肯定,在临床治疗中特别对于抗菌药物严重耐药的患者,或处于妊娠期,哺乳期地妇女等,有其特殊的价值,对于严重感染的患者,配合抗生素使用,可明显缩短症状持续时间而增加疗效。
文献报道的黄蜀葵花提取方法有乙醇回流提取、超声提取、常温浸泡提取,但黄蜀葵花总黄酮成分复杂,成分含量变化较大,且提取率偏低,能耗大。因此,有必要探索一种尿路感染的治疗药物及其提取工艺。
发明内容
本发明提供如下技术方案:
本发明提供一种黄蜀葵花提取物在制备尿路感染药物中的应用。所述尿路感染为膀胱炎。
同时,本发明还提供一种黄蜀葵花提取物在制备尿路充血与水肿药物中的应用,进一步为膀胱充血以及膀胱水肿。更进一步,所述尿路充血与水肿为尿路感染伴有的尿路充血与水肿,进一步所述尿路充血与水肿为膀胱炎伴有的膀胱充血与水肿。
所述黄蜀葵花提取物,含有如下质量比的7种黄酮类成分:槲皮素:槲皮素-3'-O-葡萄糖苷:杨梅素:棉皮素-8-O-β-D-葡萄糖醛酸苷:异槲皮苷:芦丁:金丝桃苷的质量比为:1:4-12:1-3:10-40:6-16:0.8-2:7-28。
所述黄蜀葵花提取物,其中槲皮素:槲皮素-3'-O-葡萄糖苷:杨梅素:棉皮素-8-O-βD-葡萄糖醛酸苷:异槲皮苷:芦丁:金丝桃苷的质量比为:1:5-10:1-2.5:10-40:6-16:0.8-2:8-27,优选为:1:5-9:1-3:10-38:6-15:0.8-2:8-26,进一步优选为:1:5-7:1-3:10-14:6-10:0.8-1.5:8-12。
所述的黄蜀葵花提取物,也称为黄蜀葵花黄酮类提取物,其中所述7种黄酮成分占提取物总重的8.0%以上,可以选自8.5%-15.0%,或者8.5%-12.0%,或者8.6%-11.0%。
本发明还进一步提供所述黄蜀葵花提取物的制备方法:包括如下步骤:
(1)用溶剂将黄蜀葵花浸泡或不浸泡;
(2)用溶剂对浸泡后的黄蜀葵花进行渗漉或回流提取;
(3)收集渗漉液或回流提取液,去除溶剂。
进一步所述提取物的方法,其步骤如下:
(1)用溶剂将黄蜀葵花浸泡;
(2)用溶剂对浸泡后的黄蜀葵花进行渗漉;
(3)收集渗漉液,去除溶剂得总黄酮。
所述的黄蜀葵花经切碎或粉碎后进行提取,优选尺寸等于小于24目筛筛孔。
所述溶剂为50%-90%乙醇水溶液,优选为55%-75%乙醇水溶液,进一步优选为55%-65%乙醇水溶液。
所述的浸泡时间为0.5-5小时,优选为1-2小时。
所述的渗漉速度为1-200ml/min/kg,优选为10-100ml/min/kg,进一步优选为20-80ml/min/kg。
所述的渗漉溶剂用量为15-25倍量。
所述的去除溶剂为减压浓缩,温度为55℃-70℃。
具体而言,本发明黄蜀葵花提取物的制备方法如下:
(1)取黄蜀葵花粉碎为粗粉后,用50%-90%乙醇水溶液将黄蜀葵花浸泡1-5小时;
(2)用50%-90%乙醇水溶液对浸泡后的黄蜀葵花进行渗漉,渗漉速度为10-100ml/min/kg,渗漉溶剂用量为15-25倍量;
(3)收集渗漉液,在55℃-70℃减压去除溶剂即得。
本发明黄蜀葵花提取物的制备方法进一步优选步骤如下:
(1)取黄蜀葵花粉碎为粗粉后,用60%-80%乙醇水溶液将黄蜀葵花浸泡1-4小时;
(2)用60%-80%乙醇水溶液,优选60-70%乙醇对浸泡后的黄蜀葵花进行渗漉,渗漉速度为20-80ml/min/kg,渗漉溶剂用量为18-20倍量;
(3)收集渗漉液,在60℃-65℃减压去除溶剂即得。
本发明具有如下有益效果:
1、本发明提供的黄蜀葵提取物,除了具有显著的尿路感染如膀胱炎的治疗效果,还具有明显抑制尿路充血以及水肿,尤其是膀胱充血以及膀胱水肿的效果。
2、本发明的渗漉提取工艺,在提高黄蜀葵花总黄酮提取率的前提下,不但能减少提取溶剂的用量,降低能耗,还可以充分回收提取溶剂,大大降低溶剂的损耗,降低生产成本,有利于工业化生产。另外,本发明的工艺,可以大幅提高槲皮苷及槲皮素在所述7种黄酮成分中的含量,使得提取物具有更好的尿路感染如膀胱炎的治疗活性。
附图说明
图1是渗漉提取物B对膀胱炎小鼠膀胱组织HE染色病理切片的影响。
具体实施方式
本实施例用到的黄蜀葵花为黄蜀葵的干燥花,产地为江苏现代药用植物种植有限公司的江苏兴化种植基地。
实施例1黄蜀葵花提取物的制备
取35g黄蜀葵花切碎后,用50%乙醇水溶液将黄蜀葵花浸泡1小时;用50%乙醇水溶液对浸泡后的黄蜀葵花进行渗漉,渗漉速度为50ml/min/kg,渗漉溶剂用量为15倍量;收集渗漉液,在55℃减压去除溶剂得黄蜀葵花提取物8.13g。
实施例2黄蜀葵花提取物的制备
取30g黄蜀葵花切碎后,用90%乙醇水溶液将黄蜀葵花浸泡5小时;用90%乙醇水溶液对浸泡后的黄蜀葵花进行渗漉,渗漉速度为80ml/min/kg,渗漉溶剂用量为25倍量;收集渗漉液,在55℃减压去除溶剂得黄蜀葵花提取物8.42g。
实施例3黄蜀葵花提取物的制备
取25g黄蜀葵花粉碎过24目筛后,用60%乙醇水溶液将黄蜀葵花浸泡1小时;用60%乙醇水溶液对浸泡后的黄蜀葵花进行渗漉,渗漉速度为80ml/min/kg,渗漉溶剂用量为18倍量;收集渗漉液,在60℃减压去除溶剂得黄蜀葵花提取物8.28g。
实施例4黄蜀葵花提取物的制备
取20黄蜀葵花粉碎过10目筛后,用70%乙醇水溶液将黄蜀葵花浸泡3小时;用70%乙醇水溶液对浸泡后的黄蜀葵花进行渗漉,渗漉速度为40ml/min/kg,渗漉溶剂用量为20倍量;收集渗漉液,在55℃减压去除溶剂得黄蜀葵花提取物8.57g。
实施例5黄蜀葵花提取物的制备
回流提取:取25g黄蜀葵花粉碎过24目筛后,加18倍量95%乙醇,回流提取1小时后,收集提取液(95%乙醇回流提取液),在60℃减压去除溶剂得黄蜀葵花提取物4.29g。
回流提取:取25g黄蜀葵花粉碎过24目筛后,加18倍量70%乙醇,回流提取1小时后,收集提取液(70%乙醇回流提取液),在60℃减压去除溶剂得黄蜀葵花提取物6.72g。称为渗漉提取物A。
渗漉提取:取25黄蜀葵花粉碎过10目筛后,用70%乙醇水溶液将黄蜀葵花浸泡3小时;用70%乙醇水溶液对浸泡后的黄蜀葵花进行渗漉,渗漉速度为40ml/min/kg,渗漉溶剂用量为20倍量;收集渗漉液(70%乙醇渗漉液),在55℃减压去除溶剂得黄蜀葵花提取物8.51g。
渗漉提取:取25g黄蜀葵花粉碎过24目筛后,用60%乙醇水溶液将黄蜀葵花浸泡1小时;用60%乙醇水溶液对浸泡后的黄蜀葵花进行渗漉,渗漉速度为40ml/min/kg,渗漉溶剂用量为18倍量;收集渗漉液(60%乙醇渗漉液),在60℃减压去除溶剂得黄蜀葵花提取物8.38g。称为渗漉提取物B。
实施例6黄蜀葵花提取物的含量测定
对实施例5中制备得到的渗漉液样品进行7种成分的含量的测定。检测方法采用《一测多评法测定黄蜀葵花中7个成分》(《药物分析杂志》,2013年第12期,2082-2087)中报道的UPLC法测定其中成分的含量。样品中各成分的检测结果如下表所示:
其中,渗漉提取方法对7种成分的提取效果在不同的乙醇浓度下,提取效果比回流提取有显著差异,7种成分含量提高,并且转移更完全,其中异槲皮苷及槲皮素转移率显著增加。与现有技术教导的70%乙醇对总黄酮回流提取为最优工艺有显著差异的效果(正交试验法优选黄蜀葵花总黄酮提取工艺,实用临床医药杂志,2006,10(4):98-99。正交试验法优选黄蜀葵花中金丝桃苷的提取工艺,中国药师,2009,12(3):354-356)。另外,70%乙醇渗漉液部分的固形物中,7种黄酮成分占固形物总重的8.69%,60%乙醇渗漉液部分的固形物(渗漉提取物B)中,7种黄酮成分共占固形物总重的9.45%。
其中,7种黄酮成分在黄蜀葵花提取物中的质量比例如下表所示:
实施例7总黄酮提取物的抗菌抗炎活性测定
7.1体外抗菌试验:
采用试管法对实施例5中制备得到的渗漉提取物B进行体外抗菌作用研究,结果显示:渗漉提取物B体外对大肠杆菌、副大肠杆菌和绿脓杆变形杆菌的标准菌株和临床分离菌株均有明显的抑制作用。其中,对大肠杆菌、副大肠杆菌的最小抑菌浓度为0.05-0.1mg/ml,对变形杆菌的最小抑菌浓度为0.1-0.5mg/ml。
7.2小鼠泌尿道感染试验:
实验方法:ICR小鼠,体重22±2g。随机抽取9只小鼠做为空白组。其余小鼠禁水24h后,70mg/kg的戊巴比妥钠,按0.1ml/10g进行腹腔麻醉,麻醉成功后,使小鼠仰卧于平台,以胶带固定,轻压小鼠腹部促其排尿,然后将聚乙烯-10管经外尿道口缓慢插入膀胱,排净尿液。微量进样针量取大肠杆菌,经聚乙烯-10管,缓慢注入膀胱。用4号丝线捆扎小鼠尿道外口,保持大肠杆菌在膀胱内30分钟,松开结扎丝线。结束后,碘伏棉球消毒尿道口及周围皮肤以防止感染发生,安置好小鼠待其复苏。按体重随机分为模型组,口服灌胃给药渗漉提取物B水溶液的低(75mg/kg),中(150mg/kg),高剂量(300mg/kg)组及阳性药盐酸左氧氟沙星组(Levofloxacin)。造模24小时后观察尿液中白细胞增多,则造模成功。连续给药5天,每天同一时间称量小鼠体重,并在固定时间采用膀胱压迫刺激法收集尿液,观察不同组别小鼠尿液的浑浊度并拍照。连续给药5天后,称量小鼠体重并记录后脱颈椎处死,迅速摘除膀胱并称重,按照膀胱重量×100/小鼠体重,计算膀胱指数。将膀胱组织用10%福尔马林固定,常规脱水后石蜡包埋。切片经HE染色,光学显微镜下观察组织病理学变化。
实验结果:(1)体重。与空白组比较,造模后小鼠渗漉提取物B给药中、高组体重下降,二者比较有显著性差异(P<0.05),渗漉提取物B低剂量组体重有降低趋势。与模型组比较,渗漉提取物B给药中、高组连续给药5天后,明显增加(P<0.05)。(2)尿液。与空白组比较,模型组尿液浑浊、颜色加深,随着给药天数的增加,不同治疗组的尿液颜色变浅,浑浊程度均有明显减轻。(3)膀胱形态。连续给药5天后,空白组小鼠膀胱透明,光滑。与空白组比较,模型组小鼠膀胱明显肿大、充血、水肿;膀胱指数明显增加,与空白组比较有显著性差异。与模型组比较,渗漉提取物B不同剂量给药组膀胱充血、水肿减轻,膀胱指数均下降,其中、高剂量组与模型组比较均有显著性差异。(4)膀胱病理切片。如图1可见,膀胱组织HE染色病理切片显示,模型组表现为粘膜下间质充血、水肿、炎细胞浸润,粘膜上皮细胞增生,严重病例上皮细胞坏死。与模型组相比,渗漉提取物B中、高剂量连续灌胃给药5天后,膀胱组织病理程度明显减轻,病理学评分也明显下降,与模型组比较有统计学有显著性差异。以上结果显示,渗漉提取物B在150mg/kg、300mg/kg剂量具有显著的尿道感染如膀胱炎治疗活性,75mg/kg剂量也有降低模型小鼠肾脏指数的趋势。
Claims (10)
1.一种黄蜀葵花提取物,含有如下质量比的成分:
槲皮素:槲皮素-3'-O-葡萄糖苷:杨梅素:棉皮素-8-O-β-D-葡萄糖醛酸苷:异槲皮苷:芦丁:金丝桃苷的质量比为:1:4-12:1-3:10-40:6-16:0.8-2:7-28。
2.权利要求1所述的提取物,其特征在于槲皮素:槲皮素-3'-O-葡萄糖苷:杨梅素:棉皮素-8-O-βD-葡萄糖醛酸苷:异槲皮苷:芦丁:金丝桃苷的质量比为:1:5-10:1-2.5:10-40:6-16:0.8-2:8-27。
3.权利要求1所述的提取物,其特征在于槲皮素:槲皮素-3'-O-葡萄糖苷:杨梅素:棉皮素-8-O-βD-葡萄糖醛酸苷:异槲皮苷:芦丁:金丝桃苷的质量比为:1:5-9:1-3:10-38:6-15:0.8-2:8-26。
4.权利要求1所述的提取物,其特征在于槲皮素:槲皮素-3'-O-葡萄糖苷:杨梅素:棉皮素-8-O-βD-葡萄糖醛酸苷:异槲皮苷:芦丁:金丝桃苷的质量比为优选为:1:5-7:1-3:10-14:6-10:0.8-1.5:8-12。
5.权利要1所述的一种黄蜀葵花提取物在制备尿路感染药物中的应用。
6.权利要求5所述的应用,其特征在于,所述尿路感染为膀胱炎。
7.权利要1所述的一种黄蜀葵花提取物在制备尿路充血与水肿药物中的应用。
8.权利要求7要求所述的应用,其特征在于,所述尿路充血与水肿为尿路感染伴有的尿路充血与水肿。
9.权利要求5-7任意一项所述的应用,其特征在于,所述尿路为膀胱。
10.权利要其1-9所述的提取物,其特征在于所述提取物由如下方法制备:(1)用溶剂将黄蜀葵花浸泡或不浸泡;(2)用溶剂对浸泡后的黄蜀葵花进行渗漉或回流提取;(3)收集渗漉液或回流提取液,去除溶剂。
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