CN111494426A - 僵蚕醇提物及其应用 - Google Patents
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Abstract
本发明公开了僵蚕醇提物及其应用,僵蚕醇提物以体积分数为95%和65%的乙醇溶液作为提取溶剂提取制得,提取得到的产物具有安全性好,且不会引起炎症反应,对大肠杆菌、金黄色葡萄球菌、痤疮丙酸杆菌和糠秕马拉色菌均具有一定程度的抑制作用,可作为痤疮相关化妆品原料,有望开拓僵蚕的使用价值,为功效型中药化妆品的研发和推广提供思路以及理论基础。
Description
技术领域
本发明涉及中药提取物领域,具体涉及僵蚕醇提物,还涉及僵蚕醇提物的应用。
背景技术
家蚕(Bombyx mori)是一种重要的经济昆虫,其在饲养过程中常被真菌、细菌、病毒等感染致病。在其真菌疾病中,由白僵菌引发的白僵病较为常见,感染白僵菌(Beauveriabassiana(Bals.)Vuill.)死亡后僵化的虫体即为白僵蚕,又名僵蚕。僵蚕作为一味传统中药,药用历史悠久,具有息风止痉、祛风止痛、化痰散结等功效。其含有多种成分,现代药理学研究表明其具有广泛的药理学作用。目前对僵蚕的研究,多集中在其抗惊厥、降血糖等中药药效方面,其他方面的研究很少。
因此,有必要对僵蚕提取物进行安全性和功效进行研究,有利于开拓僵蚕的使用价值,为功效型僵蚕产品的研发和推广提供思路以及理论基础。
发明内容
有鉴于此,本发明使用乙醇作为溶剂对僵蚕进行提取,得到的僵蚕提取液进行过滤浓缩,最后喷干/冻干成粉,僵蚕醇提物BBE。然后通过CCK-8法测得BBE的IC50为295.77±127.46μg/mL,通过鸡胚绒毛尿囊膜实验得出0.5%的BBE不具有眼刺激性,表明BBE的安全性高。
为此,本发明提供如下技术方案:
僵蚕醇提物,由以下方法制备:将干燥的僵蚕粉分别用体积分数为95%和65%的乙醇溶液作为提取溶剂提取,分别收集提取液,合并提取液,浓缩去除乙醇,干燥,得僵蚕醇提物。
优选的,所述僵蚕粉为粒径小于50目的粉末。
优选的,所述乙醇溶液按1:20的料液比添加。
优选的,所述提取为在18~25℃下提取2h。
经僵蚕醇提物BBE进行DPPH自由基清除实验显示,BBE浓度为5mg/mL时,DPPH·清除率达到97.91%,且其清除活力具有浓度相关性,表明BBE具有抗氧化的潜力。通过ELISA法检测BBE对RAW264.7巨噬细胞分泌炎性因子IL-1β的影响。结果显示,该方法提取得到的BBE在安全浓度范围内,不能降低LPS刺激RAW264.7巨噬细胞分泌炎性因子IL-1β的水平,但也不会致使其升高,因此可以具有抗炎能力。
为此,本发明提供如下技术方案:所述僵蚕醇提物在制备抗氧化和抗炎的药物中的应用。
为了检测BBE是否具有抑菌活性,选取革兰氏阴性代表菌大肠杆菌、革兰氏阳性代表菌金黄色葡萄球菌、与皮肤病相关的痤疮丙酸杆菌和糠秕马拉色菌作为待测菌株,对BBE的抑菌活性进行分析。结果显示,BBE具有较好的抑菌功效,其对金黄色葡萄球菌的抑制效果最好,其次是痤疮丙酸杆菌,对大肠杆菌的抑制效果最弱,表明BBE具有成为痤疮相关化妆品原料的应用潜力。
为此,本发明提供如下技术方案:
所述僵蚕醇提物在制备大肠杆菌抑制剂中的应用。
所述僵蚕醇提物在制备金黄色葡萄球菌抑制剂中的应用。
所述僵蚕醇提物在制备痤疮丙酸杆菌抑制剂中的应用。
所述僵蚕醇提物在制备糠秕马拉色菌抑制剂中的应用。
所述僵蚕醇提物在制备抗痤疮化妆品原料中的应用。
本发明的有益效果在于:本发明对僵蚕用醇进行提取,获得提取物主要含脂肪和黄酮,在脂肪和黄酮共同作用下能够抑制大肠杆菌、金黄色葡萄球菌、痤疮丙酸杆菌和糠秕马拉色菌等作用,然后对僵蚕提取物进行了安全性价,再对其进行功效筛选,期望能开拓僵蚕的使用价值,为功效型中药化妆品的研发和推广提供思路以及理论基础。
附图说明
为了使本发明的目的、技术方案和有益效果更加清楚,本发明提供如下附图进行说明:
图1为BBE对HaCat细胞的存活率曲线。
图2为BBE对CAM的刺激观察(A:阴性对照;B:阳性对照;C:0.5%僵蚕醇提物对CAM的刺激作用)。
图3为BBE对DPPH·的清除率。
图4为BBE对RAW264.7巨噬细胞分泌IL-1β的影响。
图5为BBE的抗细菌活性(A:BBE对大肠杆菌E.coli的抑制作用;B:BBE对金黄色葡萄球菌S.aureus的抑制作用)。
图6为BBE对痤疮丙酸杆菌P.acnes的抑制作用。
图7为BBE对糠秕马拉色菌M.furfur的抑制作用(A:阳性对照:0.5%的氟康唑处理;B:阴性对照:1mL丙酮处理;C:6mg/mL的BBE处理;D:5mg/mL的BBE处理;E:4mg/mL的BBE处理;F:3mg/mL的BBE处理)。
具体实施方式
下面结合附图和具体实施例对本发明作进一步说明,以使本领域的技术人员可以更好的理解本发明并能予以实施,但所举实施例不作为对本发明的限定。
实施例1、僵蚕醇提物的制备方法
将僵蚕烘干,磨粉,过50目筛;用95%和65%的乙醇作为提取溶剂,按照1:20的料液比分别室温提取2h,抽滤除去残渣并合并滤液,旋转蒸发仪浓缩提取液至没有乙醇味,最后使用冷冻干燥机冻干,得僵蚕醇提物BBE,BBE的主要成分为脂肪和黄酮。
实施例2、僵蚕醇提物BBE安全性实验
1、BBE对HaCat细胞毒性
将BBE配置成3000μg/mL的初始浓度,按照1.73的稀释因子将其稀释成8个浓度进行实验,具体步骤如下:
1)铺板:将对数生长期的HaCat细胞消化下来,用含10%胎牛血清的DMEM高糖培养基配置成细胞悬液,在96孔板中接种100μL的细胞悬液,每孔1~2×104个细胞。将96孔板置于37℃、5%CO2恒温培养箱培养;
2)样品准备:取适量样品,加含10%胎牛血清的DMEM高糖培养基溶解,将BBE配置成3000μg/mL的初始浓度,按照1.73的稀释因子将其稀释成8个浓度,并使用一次性注射器和0.22μm的过滤器对其进行过滤处理;
3)处理细胞:细胞贴壁后,将96孔板中的培养基吸出,加入100μL不同浓度的受试液。将96孔板置于37℃、5%CO2恒温培养箱培养。
4)24h后,吸出待测物质,按照每孔100μL加入培养基,再向每孔加入10μL CCK-8溶液,注意不要打出气泡,以免影响读数。将96孔板置于37℃、5%CO2恒温培养箱培养1h左右,使用酶标仪测定其在450nm处的吸光度值。
以含10%胎牛血清培养基和细胞的孔为空白对照,按下式计算细胞死亡率,用GraphPad Prism 5计算出IC50。
细胞死亡率(%)=1-(受试物OD值/空白对照OD值)×100%
结果如图1所示。结果显示,在3000μg/mL的浓度下,细胞存活率为(11±0)%,BBE对细胞产生了一定的刺激作用,但细胞仍能存活一小部分;在64.68μg/ml的浓度下,细胞存活率为(92±9)%,细胞大部分都存活。经GraphPad Prism 5分析,IC50为329.5μg/mL。
2、僵蚕醇提物BBE鸡胚绒毛尿囊膜试验
僵蚕醇提物BBE鸡胚绒毛尿囊膜试验,具体步骤如下:
1)鸡胚孵育:将种蛋以气室朝上的方式放置进孵化箱中,孵化箱温度设置为37.6℃,湿度为45%-60%,翻蛋频率3次/天-6次/天,在9日龄进行照蛋检查,观察其血管长势;
2)尿囊膜制备:用镊子小心翼翼的去除气室部分的蛋壳,暴露蛋壳膜,加入3-5滴生理盐水使蛋壳膜湿润,吸出多余的生理盐水,小心用尖头镊子将蛋壳膜撕开,暴露完整的尿囊膜;
3)在暴露出的尿囊膜上放置一个硅酮橡胶环,内加300μL BBE质量分数为0.5%样品,反应3min后,用生理盐水轻轻冲洗后,观察尿囊膜的反映情况,并按表1对其进行分值评价,再按表2对其进行刺激强度分级。同时利用生理盐水作为阴性对照,0.1M氢氧化钠作为阳性对照,
表1、鸡胚绒毛尿囊膜试验刺激反应评分
表2、眼刺激强度分级
结果如图2所示。结果显示,阴性对照组未引起血管的出血、凝血或血管融解(图2,A),ES值为0,按表1判定其无刺激性。阳性对照组引起几乎所有血管都出血,有明显得凝血点出现,且有血管融解现象发生(图2,B),ES值为18,按表1判定其具有强刺激性/腐蚀性。0.5%BBE组引起了小部分小血管融解,其他现象并未出现(图2,C),ES值为3,按表1判定其无/轻刺激性。
实施例3、僵蚕醇提物BBE功效实验
1、BBE对DPPH·的清除作用
配制初始浓度为5mg/mL的BBE溶液,二倍稀释成6个浓度的样品进行实验,实验结果如图3。结果显示,BBE对DPPH·的清除活性具有浓度依赖性,随浓度的升高,其清除率也在升高。当BBE的浓度从0.156mg/mL增加到5mg/mL时,其清除率也从(10.15±5.62)%增加到了(97.91±1.82)%。经计算,其半数清除浓度HSC50为3.167mg/mL。结果表明,BBE具有较强的DPPH·清除能力。
2、BBE对经LPS刺激的RAW264.7巨噬细胞分泌IL-1β的影响
根据BBE的IC50选择了200μg/mL、150μg/mL、10μg/mL、50μg/mL四个浓度进行试验。未经处理的巨噬细胞作为空白对照,地塞米松(DEX)作为阳性对照。结果如图4,LPS组的IL-1β的含量显著高于空白对照组,表明RAW264.7巨噬细胞刺激成功。阳性对照组的IL-1β的含量显著低于LPS组,这与的预期相符。而BBE组相较LPS组未显示出明显变化。表明BBE不能抑制RAW264.7巨噬细胞分泌炎性因子IL-1β,也不会刺激其产生更多IL-1β。
3、BBE对E.coli和S.aureus的抑制作用
利用营养肉汤稀释法检测BBE对E.coli和S.aureus的抑制作用。结果如图5,结果显示BBE对E.coli的抑制作用不强,且抑制率不具有浓度相关性,为(26.76±3.77)%。而BBE对S.aureus则有一个相对较好的抑制作用。BBE的浓度为2.5mg/mL时,对S.aureus的抑制率达到了(93.05±2.52)%。随着BBE浓度的降低,对S.aureus的抑制率也有了一定的下降,表明相比E.coli,BBE对S.aureus具有较强的抑制作用。
4、BBE对P.acnes的抑制作用
利用营养肉汤稀释法检测BBE对P.acnes的抑制作用。结果如图6,结果显示BBE的浓度为2.5mg/mL时,对P.acnes的抑制率为(66.19±10.2)%。随着BBE浓度的降低,对P.acnes的抑制率也有了一定的下降。表明BBE对P.acnes的抑制率具有浓度相关性。
5、BBE对M.furfur的抑制作用
利用琼脂稀释法检测BBE对M.furfur的抑制作用。结果表明0.5%的氟康唑进行处理后,完全抑制了M.furfur的生长(图7,A)。1mL的丙酮并不能抑制M.furfur的生长(图7,B),说明作为BBE的助溶剂被加入培养基的丙酮对实验结果不会产生影响。6mg/mL、5mg/mL的BBE完全抑制了M.furfur的生长(图7,C和D)。4mg/mL的BBE抑制了一部分M.furfur的生长(图7,E)。3mg/mL的BBE不能抑制M.furfur的生长(图7,F)。说明一定浓度的BBE对M.furfur具有抑制作用。
上述结果表明BBE对大肠杆菌、金黄色葡萄球菌、痤疮丙酸杆菌和糠秕马拉色菌均具有一定程度的抑制作用。皮肤表面供养了如痤疮丙酸杆菌、金黄色葡萄球菌、马拉色菌、表皮葡萄球菌等多种微生物,在合适条件下,这些微生物特别是痤疮丙酸杆菌大量增殖,引发炎症,导致痤疮的发生。因此,BBE既对几种关键菌有抑菌功效,且不会引起皮肤炎症,具有成为痤疮相关化妆品原料的应用潜力。
以上所述实施例仅是为充分说明本发明而所举的较佳的实施例,本发明的保护范围不限于此。本技术领域的技术人员在本发明基础上所作的等同替代或变换,均在本发明的保护范围之内。本发明的保护范围以权利要求书为准。
Claims (10)
1.僵蚕醇提物,其特征在于,由以下方法制备:将干燥的僵蚕粉分别用体积分数为95%和65%的乙醇溶液作为提取溶剂提取,分别收集提取液,合并提取液,浓缩去除乙醇,干燥,得僵蚕醇提物。
2.根据权利要求1所述僵蚕醇提物,其特征在于:所述僵蚕粉为粒径小于50目的粉末。
3.根据权利要求1所述僵蚕醇提物,其特征在于:所述乙醇溶液按1:20的料液比添加。
4.根据权利要求1所述僵蚕醇提物,其特征在于:所述提取为在18~25℃下提取2h。
5.权利要求1~4任一项所述僵蚕醇提物在制备大肠杆菌抑制剂中的应用。
6.权利要求1~4任一项所述僵蚕醇提物在制备金黄色葡萄球菌抑制剂中的应用。
7.权利要求1~4任一项所述僵蚕醇提物在制备痤疮丙酸杆菌抑制剂中的应用。
8.权利要求1~4任一项所述僵蚕醇提物在制备糠秕马拉色菌抑制剂中的应用。
9.权利要求1~4任一项所述僵蚕醇提物在制备抗痤疮化妆品原料中的应用。
10.权利要求1~4任一项所述僵蚕醇提物在制备抗氧化和抗炎的药物中的应用。
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