CN105779537A - 多棘海盘车酶解多肽及其作为ace抑制剂的应用 - Google Patents
多棘海盘车酶解多肽及其作为ace抑制剂的应用 Download PDFInfo
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Abstract
本发明公开一种多棘海盘车酶解多肽,该多棘海盘车酶解多肽按照以下步骤制备而得:将整只多棘海盘车放入干燥箱,65℃条件下烘干并粉碎,过20目筛,将多棘海盘车粉末按照固液比为1:20g/ml的比例与蒸馏水混合,并向其中加入蛋白酶,所加入蛋白酶为多棘海盘车质量的5%,搅拌均匀后,在恒温水浴锅内酶解8小时,获得多棘海盘车酶解液,将多棘海盘车酶解液沸水浴10min,冷却后进行离心处理,离心条件:4000r/min,离心15min,然后取上清液,透析,浓缩,冷冻干燥,获得多棘海盘车酶解多肽;以及该种多棘海盘车酶解多肽作为ACE抑制剂的应用。
Description
技术领域
本发明涉及一种多棘海盘车酶解多肽,以及该多棘海盘车酶解多肽作为ACE抑制剂的具体应用。
背景技术
多棘海盘车(Asteriasamurensis),呈五角星状,直径14cm左右,体扁,呈黄色或浅褐色,背面稍隆,口面很平,是我国黄海沿岸一种极为普遍的海星。它属于海洋无脊椎动物,棘皮动物门、海星纲,海盘车科,是已知的一种可以食用的海星。多棘海盘车于我国渤海、黄海海域分布广泛,现今已经从多棘海盘车中提取到很多种甾体皂苷、甾醇、多糖、神经酰胺与脑苷脂等成分。多棘海盘车在中国黄渤海沿海居民中有长期食用的历史,其可食部为生殖腺,成份研究表明其富含维生素、微量元素、脂肪等,且含有丰富的不饱和脂肪酸。可用作高营养、无毒的新型海洋食品原料。
高血压是较为常见的慢性病,也是心脑血管病最主要的影响因素,它能引起心肌梗塞、心力衰竭以及慢性肾脏病等并发症,潜在的危害性大。近年来,随着人们生活水平的提高,高血压的发病率也呈上升趋势,严重威胁着人类健康。血管紧张素转化酶(angiotensinconvertingenzyme,ACE)是一种二肽酶,它在肾素-血管紧张素系统中对哺乳动物的血压调节具有重要作用,它能够将血管紧张素Ⅰ转化为具有强烈收缩血管作用的血管紧张素Ⅱ,还能够催化有促血管舒张作用的缓激肽水解,因此具有ACE抑制活性的物质具有显著地降血压效果。当前人为合成的降压药物(如卡托普利)长期服用往往会产生不同程度的副作用,如心血管疾病、血管性水肿、咳嗽、皮疹等。随着时代进步,人们越来越重视此类药物的安全性。因此,筛选对ACE具有强抑制活性的天然降压活性物质对人类健康具有重要的意义。
发明内容
本发明是为了解决现有技术所存在的上述不足,提出一种多棘海盘车酶解多肽,以及该种酶解多肽作为ACE抑制剂的应用。
本发明的技术解决方案是:一种多棘海盘车酶解多肽,其特征在于:所述的多棘海盘车酶解多肽按照以下步骤制备而得:
将整只多棘海盘车放入干燥箱,65℃条件下烘干并粉碎,过20目筛,将多棘海盘车粉末按照固液比为1:20g/ml的比例与蒸馏水混合,并向其中加入蛋白酶,所加入蛋白酶为多棘海盘车质量的5%,搅拌均匀后,在恒温水浴锅内酶解8小时,获得多棘海盘车酶解液,将多棘海盘车酶解液沸水浴10min,冷却后进行离心处理,离心条件:4000r/min,离心15min,然后取上清液,透析,浓缩,冷冻干燥,获得多棘海盘车酶解多肽。
所述的多棘海盘车酶解多肽按照以下步骤制备而得:
将整只多棘海盘车放入干燥箱,65℃条件下烘干并粉碎,过20目筛,将多棘海盘车粉末按照固液比为1:20g/ml的比例与蒸馏水混合,并向其中加入胃蛋白酶,所加入胃蛋白酶为多棘海盘车质量的5%,搅拌均匀后,用浓盐酸调节pH=2.0,然后在37℃的条件下于恒温水浴锅内酶解8小时,获得多棘海盘车酶解液,将多棘海盘车酶解液沸水浴10min,冷却后进行离心处理,离心条件:4000r/min,离心15min,然后取上清液,透析,浓缩,冷冻干燥,获得多棘海盘车酶解多肽。
所述的多棘海盘车酶解多肽按照以下步骤制备而得:
将整只多棘海盘车放入干燥箱,65℃条件下烘干并粉碎,过20目筛,将多棘海盘车粉末按照固液比为1:20g/ml的比例与蒸馏水混合,并向其中加入木瓜蛋白酶,所加入木瓜蛋白酶为多棘海盘车质量的5%,搅拌均匀后,用浓盐酸调节pH=6.5,然后在60℃的条件下于恒温水浴锅内酶解8小时,获得多棘海盘车酶解液,将多棘海盘车酶解液沸水浴10min,冷却后进行离心处理,离心条件:4000r/min,离心15min,然后取上清液,透析,浓缩,冷冻干燥,获得多棘海盘车酶解多肽。
所述的多棘海盘车酶解多肽按照以下步骤制备而得:
将整只多棘海盘车放入干燥箱,65℃条件下烘干并粉碎,过20目筛,将多棘海盘车粉末按照固液比为1:20g/ml的比例与蒸馏水混合,并向其中加入碱性蛋白酶,所加入碱性蛋白酶为多棘海盘车质量的5%,搅拌均匀后,用氢氧化钠调节pH=12.0,然后在50℃的条件下于恒温水浴锅内酶解8小时,获得多棘海盘车酶解液,将多棘海盘车酶解液沸水浴10min,冷却后进行离心处理,离心条件:4000r/min,离心15min,然后取上清液,透析,浓缩,冷冻干燥,获得多棘海盘车酶解多肽。
一种如上所述的多棘海盘车酶解多肽作为ACE抑制剂的应用。
本发明同现有技术相比,具有如下优点:
本发明所公开的多棘海盘车的酶解多肽,经过申请人的试验表明,该多棘海盘车酶解多肽对于血管紧张素转化酶(angiotensinconvertingenzyme,ACE)具有较好的抑制活性功能,该多肽可以作为降血压的药物和保健品的原料,以进行此类药物或保健品的生产。并且该种多棘海盘车酶解多肽获得容易,成本低廉,因此可以说它具备了多种优点,特别适合于在本领域中推广应用,其市场前景十分广阔。
附图说明
图1为本发明实施例的三种酶解多肽的ACE活性抑制率曲线图。
图2为卡托普利ACE活性抑制率曲线。
具体实施方式
下面将结合附图说明本发明的具体实施方式。如图1、图2所示:
一种多棘海盘车酶解多肽,其特征在于:所述的多棘海盘车酶解多肽按照以下步骤制备而得:
将整只多棘海盘车放入干燥箱,65℃条件下烘干并粉碎,过20目筛,将多棘海盘车粉末按照固液比为1:20g/ml的比例与蒸馏水混合,并向其中加入蛋白酶,所加入蛋白酶为多棘海盘车质量的5%,搅拌均匀后,在恒温水浴锅内酶解8小时,获得多棘海盘车酶解液,将多棘海盘车酶解液沸水浴10min,冷却后进行离心处理,离心条件:4000r/min,离心15min,然后取上清液,透析,浓缩,冷冻干燥,获得多棘海盘车酶解多肽。
实施例一:
将整只多棘海盘车放入干燥箱,65℃条件下烘干并粉碎,过20目筛,将多棘海盘车粉末按照固液比为1:20g/ml的比例与蒸馏水混合,并向其中加入胃蛋白酶,所加入胃蛋白酶为多棘海盘车质量的5%,搅拌均匀后,用浓盐酸调节pH=2.0,然后在37℃的条件下于恒温水浴锅内酶解8小时,获得多棘海盘车酶解液,将多棘海盘车酶解液沸水浴10min,冷却后进行离心处理,离心条件:4000r/min,离心15min,然后取上清液,透析,浓缩,冷冻干燥,获得胃蛋白酶酶解多肽(PE-P)。
实施例二:
将整只多棘海盘车放入干燥箱,65℃条件下烘干并粉碎,过20目筛,将多棘海盘车粉末按照固液比为1:20g/ml的比例与蒸馏水混合,并向其中加入木瓜蛋白酶,所加入木瓜蛋白酶为多棘海盘车质量的5%,搅拌均匀后,用浓盐酸调节pH=6.5,然后在60℃的条件下于恒温水浴锅内酶解8小时,获得多棘海盘车酶解液,将多棘海盘车酶解液沸水浴10min,冷却后进行离心处理,离心条件:4000r/min,离心15min,然后取上清液,透析,浓缩,冷冻干燥,获得木瓜蛋白酶酶解多肽(PA-P)。
实施例三:
将整只多棘海盘车放入干燥箱,65℃条件下烘干并粉碎,过20目筛,将多棘海盘车粉末按照固液比为1:20g/ml的比例与蒸馏水混合,并向其中加入碱性蛋白酶,所加入碱性蛋白酶为多棘海盘车质量的5%,搅拌均匀后,用氢氧化钠调节pH=12.0,然后在50℃的条件下于恒温水浴锅内酶解8小时,获得多棘海盘车酶解液,将多棘海盘车酶解液沸水浴10min,冷却后进行离心处理,离心条件:4000r/min,离心15min,然后取上清液,透析,浓缩,冷冻干燥,获得碱性蛋白酶酶解多肽(AP-P)。
上述三种多棘海盘车酶解多肽作为ACE抑制剂的应用。
对经过上述方法获得的多肽进行ACE抑制活性研究实验,具体步骤如下:
a.高效液相色谱检测条件:流动相:甲醇:水=30:70(含有0.1%TFA和0.05%冰乙酸);流速:1.0mL/min;检测波长:228nm;柱温:25℃;色谱柱:KromasilC18色谱柱(5um,I.D.4.6mm×250mm);进样量:20μL。
b.多肽样品抑制ACE活性分析:分别取10μL不同浓度的多肽样品液(由pH8.3的硼酸-硼砂缓冲液,含0.3mol/LNaCl配置)于1.5mL的离心管中,加入30μLACE(60U/mL),37℃下反应5min后,加入50μL马尿酰-组胺酰-亮氨酸(Hip-His-Leu,HHL,7.6mmol/L)溶液,充分混合37℃下反应30min,加入10μL的10%TFA溶液终止反应,测定马尿酸(Hip)的峰面积,平行测定三次计算平均值,通过抑制率公式计算样品抑制ACE活性。
式中:A——不含活性组分样品测定Hip的峰面积
B——含活性组分样品测得Hip的峰面积
c.卡托普利对照品ACE抑制活性分析
配制不同浓度的卡托普利溶液对照品,按照b的实验方法分别测定卡托普利样品的ACE抑制率。
实验结果表明:在本文HPLC条件下,Hip保留时间在9.5分钟左右,HHL在102分钟左右,Hip与HHL之间互不干扰,实验可行。测得Hip浓度在0.2~10mg/mL与峰面积的线性关系关系良好,回归方程为y=11239x-2556.1,R2=0.9991,最低检出限位0.2mg/mL,RSD的值在1.905~6.361%,说明该测定方法精密度良好,可用于对ACE抑制活性检测分析。
分别由胃蛋白酶、木瓜蛋白酶、碱性蛋白酶水解多棘海盘车所得多肽PE-P、PA-P、AP-P的抑制ACE活性测定结果见图1。
由图1可知,碱性蛋白酶水解多棘海盘车蛋白得到的多肽AP-P的抑制ACE活性显著高于另外两种酶水解所得的多肽。在AP-P的浓度达到10mg/mL时对ACE的抑制率高达95.88%。用木瓜蛋白酶和胃蛋白酶水解多棘海盘车得到的多肽PA-P和PE-P的ACE抑制率也很高,在本实验最高浓度(10mg/mL)对ACE的抑制率分别为88.5%、86.1%。PA-P和PE-P在浓度为0.2~2mg/mL时,其浓度与抑制率呈线性关系,当浓度大于2mg/mL后抑制率增长缓慢。PA-P在0~1mg/mL抑制率增长明显,当浓度大于2mg/mL后其对ACE的抑制活性基本达到平衡,抑制率没有显著变化。根据对AP-P、PA-P、PE-P抑制率的分析结果,最终得到AP-P、PA-P、PE-P半抑制浓度IC50分别为:0.3328、0.5526、0.6827mg/mL。
为对比多肽样品对ACE活性抑制的效果,实验分析了目前市面上治疗高血压疗效最好的卡托普利品的ACE活性抑制,如图2所示。在浓度0.2mg/mL浓度时卡托普利对ACE的活性抑制率已经达到99.99%。计算可知卡托普利的半抑制浓度IC50值为0.453μmol/L。
Claims (5)
1.一种多棘海盘车酶解多肽,其特征在于:所述的多棘海盘车酶解多肽按照以下步骤制备而得:
将整只多棘海盘车放入干燥箱,65℃条件下烘干并粉碎,过20目筛,将多棘海盘车粉末按照固液比为1:20g/ml的比例与蒸馏水混合,并向其中加入蛋白酶,所加入蛋白酶为多棘海盘车质量的5%,搅拌均匀后,在恒温水浴锅内酶解8小时,获得多棘海盘车酶解液,将多棘海盘车酶解液沸水浴10min,冷却后进行离心处理,离心条件:4000r/min,离心15min,然后取上清液,透析,浓缩,冷冻干燥,获得多棘海盘车酶解多肽。
2.根据权利要求1所述的多棘海盘车酶解多肽,其特征在于:所述的多棘海盘车酶解多肽按照以下步骤制备而得:
将整只多棘海盘车放入干燥箱,65℃条件下烘干并粉碎,过20目筛,将多棘海盘车粉末按照固液比为1:20g/ml的比例与蒸馏水混合,并向其中加入胃蛋白酶,所加入胃蛋白酶为多棘海盘车质量的5%,搅拌均匀后,用浓盐酸调节pH=2.0,然后在37℃的条件下于恒温水浴锅内酶解8小时,获得多棘海盘车酶解液,将多棘海盘车酶解液沸水浴10min,冷却后进行离心处理,离心条件:4000r/min,离心15min,然后取上清液,透析,浓缩,冷冻干燥,获得多棘海盘车酶解多肽。
3.根据权利要求1所述的多棘海盘车酶解多肽,其特征在于:所述的多棘海盘车酶解多肽按照以下步骤制备而得:
将整只多棘海盘车放入干燥箱,65℃条件下烘干并粉碎,过20目筛,将多棘海盘车粉末按照固液比为1:20g/ml的比例与蒸馏水混合,并向其中加入木瓜蛋白酶,所加入木瓜蛋白酶为多棘海盘车质量的5%,搅拌均匀后,用浓盐酸调节pH=6.5,然后在60℃的条件下于恒温水浴锅内酶解8小时,获得多棘海盘车酶解液,将多棘海盘车酶解液沸水浴10min,冷却后进行离心处理,离心条件:4000r/min,离心15min,然后取上清液,透析,浓缩,冷冻干燥,获得多棘海盘车酶解多肽。
4.根据权利要求1所述的多棘海盘车酶解多肽,其特征在于:所述的多棘海盘车酶解多肽按照以下步骤制备而得:
将整只多棘海盘车放入干燥箱,65℃条件下烘干并粉碎,过20目筛,将多棘海盘车粉末按照固液比为1:20g/ml的比例与蒸馏水混合,并向其中加入碱性蛋白酶,所加入碱性蛋白酶为多棘海盘车质量的5%,搅拌均匀后,用氢氧化钠调节pH=12.0,然后在50℃的条件下于恒温水浴锅内酶解8小时,获得多棘海盘车酶解液,将多棘海盘车酶解液沸水浴10min,冷却后进行离心处理,离心条件:4000r/min,离心15min,然后取上清液,透析,浓缩,冷冻干燥,获得多棘海盘车酶解多肽。
5.一种如权利要求1所述的多棘海盘车酶解多肽作为ACE抑制剂的应用。
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