CN114573430B - 一种甘草抗炎物质及其制备方法 - Google Patents
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Abstract
本发明公开了一种甘草抗炎物质及其制备方法。本发明从甘草中制备分离得到一种酚类抗炎物质,该化合物的产率为0.1~9.4mg/kg(纯度为85~95%)。本发明对于推动甘草的深加工利用,提升甘草产品附加值,促进该行业的可持续发展具有重要的意义。
Description
技术领域
本发明涉及农产品加工领域,涉及一种生物活性物质及其制备方法,具体涉及3,4’-二羟基-5-O-香叶基二苯乙烯及其制备方法。
背景技术
甘草属于豆科甘草属植物,广泛种植于世界各地,我国北部、西部地区为主要甘草种植地区。甘草属于药食同源植物,香甜可口,营养价值和保健功能较高,具有预防炎症、抗氧化等功效。有研究表明,甘草富含酚类物质,具有抗癌、调节免疫等生物活性。然而,目前仍有大量的甘草活性成分未被鉴定,相关活性物质组成仍有待研究。
发明内容
本发明的目的是提供一种甘草抗炎物质及其制备方法,具体为3,4’-二羟基-5-O-香叶基二苯乙烯及其制备方法。
本发明的第一个目的是提供3,4’-二羟基-5-O-香叶基二苯乙烯,该化合物是从甘草中提取分离得到,其结构式如下式(I)所示:
本发明的第二个目的是提供3,4’-二羟基-5-O-香叶基二苯乙烯的制备方法,其是从甘草中制备分离得到的,具体包括以下步骤:用体积分数30~95%乙醇水溶液或热水浸提甘草,将浸提液浓缩去除乙醇后用水溶解,然后依次用石油醚、乙酸乙酯萃取,将乙酸乙酯萃取液浓缩得浸膏,浸膏经硅胶柱层析,以石油醚/乙酸乙酯为洗脱剂,从体积比100/0~60/40梯度洗脱,收集石油醚/乙酸乙酯体积比为80/20洗脱的馏分,该馏分再经反相柱层析,以乙腈/水为洗脱剂,从体积比5/95~100/0梯度洗脱,收集乙腈/水体积比为75/25洗脱的馏分,蒸发干燥即得到3,4’-二羟基-5-O-香叶基二苯乙烯。
优选,所述的甘草为新鲜的或干燥的甘草根茎。
优选,所述的用体积分数30~95%乙醇水溶液或热水浸提甘草,乙醇水溶液或水的用量是5~30mL/g甘草,浸提的温度为25~100℃,浸提时间为1~72小时。
优选,所述的将浸提液浓缩去除乙醇后用水溶解,是将浸提液在40~80℃下浓缩除去乙醇,再加入1~5倍体积的水溶解。
优选,所述的依次用石油醚、乙酸乙酯萃取,是先用石油醚萃取3~12次,再用乙酸乙酯萃取3~12次。
本发明的第三个目的是提供3,4’-二羟基-5-O-香叶基二苯乙烯或其盐在制备抗炎护肤品、药品或食品中的应用。
本发明的第四个目的是提供一种抗炎护肤品、药品或食品,其含有上述3,4’-二羟基-5-O-香叶基二苯乙烯或其盐作为活性成分。
本发明的第五个目的是提供甘草在制备3,4’-二羟基-5-O-香叶基二苯乙烯中的应用。
本发明证实,所述的化合物3,4’-二羟基-5-O-香叶基二苯乙烯具有良好的抑制炎症能力,该化合物对巨噬细胞NO合成的抑制活性IC50值为19.4μM,明显优于阳性对照白藜芦醇(IC50值32.7μM)。表明本发明提供的化合物3,4’-二羟基-5-O-香叶基二苯乙烯具有优异的炎症抑制活性,可用于制备抗炎护肤品、药品或食品。
与现有技术相比,本发明的优势在于:
本发明从甘草中制备分离得到3,4’-二羟基-5-O-香叶基二苯乙烯,该化合物的产率为0.1~9.4mg/kg(纯度为85~95%)。本发明对于推动甘草的深加工利用,提升甘草产品附加值,促进该行业的可持续发展具有重要的意义。同时也为3,4’-二羟基-5-O-香叶基二苯乙烯的制备提供了一种新的方法。
具体实施方式
以下实施例是对本发明的进一步说明,而不是对本发明的限制。
实施例1
一、3,4’-二羟基-5-O-香叶基二苯乙烯的制备分离
1)选料:选择新鲜甘草根茎,清水洗涤;
2)干燥粉碎:将甘草晒干或烘干,采用粉碎机粉碎;
3)浸提:按5mL/g甘草的投料量(即每克甘草加5mL乙醇水溶液),往甘草中加入体积分数30%的乙醇水溶液,在25℃浸提1小时,过滤,收集过滤液;
4)有机溶剂分级:将上述过滤液在40℃下浓缩除去乙醇,得浓缩液,加入浓缩液1倍体积的水,先后用等体积的石油醚、乙酸乙酯分别萃取3次;选择乙酸乙酯相萃取液进行浓缩,将得到的浸膏用于后续纯化;
5)取乙酸乙酯相萃取液浓缩后得到的浸膏,采用硅胶柱(100~200目)层析,以石油醚/乙酸乙酯为洗脱溶剂,从体积比100/0~60/40梯度洗脱,收集石油醚/乙酸乙酯体积比为80/20洗脱的组分,再经C18反相柱层析,以乙腈/水为洗脱剂,从体积比5/95~100/0梯度洗脱,收集乙腈/水体积比为75/25洗脱的组分,在60℃蒸发浓缩干燥,即得到化合物1(3,4’-二羟基-5-O-香叶基二苯乙烯)。
采用该方法获得的3,4’-二羟基-5-O-香叶基二苯乙烯的产率为0.1~2.6mg/kg,纯度为85~95%。
二、化合物1(3,4’-二羟基-5-O-香叶基二苯乙烯)的结构鉴定
化合物1(3,4’-二羟基-5-O-香叶基二苯乙烯)可溶解于甲醇,质谱结果表明:该化合物分子量为364。该化合物的1HNMR(500MHz,CD3OD)和13C NMR(125MHz,CD3OD)见表1。
表1化合物1的13C与1H谱化学位移
综上所述,鉴定该化合物1的结构式如式(I)所示,名称为:3,4’-二羟基-5-O-香叶基二苯乙烯。
实施例2
1)选料:选择新鲜甘草根茎,清水洗涤;
2)干燥粉碎:将甘草晒干或烘干,采用粉碎机粉碎;
3)浸提:按30mL/g甘草的投料量(即每克甘草加30mL乙醇水溶液),往甘草中加入体积分数95%的乙醇水溶液,在60℃浸提72小时,过滤,收集过滤液;
4)有机溶剂分级:将上述过滤液在60℃浓缩除去乙醇,得浓缩液,加入浓缩液5倍体积的水,先后用等体积的石油醚、乙酸乙酯分别萃取12次;选择乙酸乙酯相萃取液进行浓缩,将得到的浸膏用于后续纯化;
后续纯化步骤与实施例1相同,由此得到化合物1并鉴定为3,4’-二羟基-5-O-香叶基二苯乙烯。
采用该方法获得的3,4’-二羟基-5-O-香叶基二苯乙烯的产率为5.2~9.4mg/kg,纯度为85~95%。
实施例3
1)选料:选择新鲜甘草根茎,清水洗涤;
2)干燥粉碎:将甘草晒干或烘干,采用粉碎机粉碎;
3)浸提:按20mL/g甘草的投料量(即每克甘草加20mL乙醇水溶液),往桑叶粉末中加入体积分数40%的乙醇水溶液,在55℃浸提24小时,过滤,收集过滤液;
4)有机溶剂分级:将上述过滤液在60℃浓缩除去乙醇,得浓缩液,加入浓缩液3倍体积的水,先后用等体积的石油醚、乙酸乙酯分别萃取6次;选择乙酸乙酯相萃取液进行浓缩,将得到的浸膏用于后续纯化;
后续纯化步骤与实施例1相同,得到化合物1并鉴定为3,4’-二羟基-5-O-香叶基二苯乙烯。
采用该方法获得的3,4’-二羟基-5-O-香叶基二苯乙烯的产率为2.2~6.4mg/kg,纯度为85~95%。
实施例4
1)选料:选择新鲜甘草根茎,清水洗涤;
2)干燥粉碎:将甘草晒干或烘干,采用粉碎机粉碎;
3)浸提:按5mL/g甘草的投料量(即每克甘草加5mL乙醇水溶液),往甘草中加入体积分数95%的乙醇水溶液,在70℃浸提48小时,过滤,收集过滤液;
4)有机溶剂分级:将上述过滤液在80℃浓缩除去乙醇,得浓缩液,加入浓缩液1倍体积的水,先后用等体积的石油醚、乙酸乙酯分别萃取6次;选择乙酸乙酯相萃取液进行浓缩,将得到的浸膏用于后续纯化;
后续纯化步骤与实施例1相同,得到化合物1并鉴定为3,4’-二羟基-5-O-香叶基二苯乙烯。
采用该方法获得的3,4’-二羟基-5-O-香叶基二苯乙烯的产率为1.6~4.3mg/kg,纯度为85~95%。
实施例5
1)选料:选择新鲜甘草根茎,清水洗涤;
2)干燥粉碎:将甘草晒干或烘干,采用粉碎机粉碎;
3)浸提:按20mL/g甘草的投料量(即每克甘草加20mL水),往甘草中加入水,在100℃浸提3小时,过滤,收集过滤液;
4)有机溶剂分级:将上述过滤液在80℃浓缩得浓缩液,先后用等体积的石油醚、乙酸乙酯分别萃取6次;选择乙酸乙酯相萃取液进行浓缩,将得到的浸膏用于后续纯化;
后续纯化步骤与实施例1相同,得到化合物1并鉴定为3,4’-二羟基-5-O-香叶基二苯乙烯。
采用该方法获得的3,4’-二羟基-5-O-香叶基二苯乙烯的产率为0.7~2.5mg/kg,纯度为85~95%。
实施例6
巨噬细胞RAW264.7为免疫细胞,常用于抗炎活性评价。巨噬细胞经脂多糖处理后,会诱发系列炎症反应,促进NO合成,提升细胞NO水平。通过添加抗炎物质,可降低NO合成水平。本发明通过巨噬细胞NO合成水平分析试验,检测化合物对巨噬细胞RAW264.7作为评价细胞模型的抗炎活性,所述的测试方法具体包括以下步骤:
RAW264.7的生长培养基为DMEM培养基+10%FBS+50μg/mL链霉素和50U/mL的青霉素,培养于5%CO2、37℃培养箱中。将细胞以1.7×104个/孔的细胞浓度,每孔100μL铺于96孔板中,培养12h后,吸除培养基。加入含200ng/mL脂多糖、0~50μM抗炎物质3,4’-二羟基-5-O-香叶基二苯乙烯的培养基100μL。培养24h后,收集上清液,试剂盒测定NO水平,计算抗炎活性IC50值。不含脂多糖的培养基为空白对照;仅含脂多糖的培养基作为模型对照;白藜芦醇作为阳性对照。每个处理3个重复。
结果表明,3,4’-二羟基-5-O-香叶基二苯乙烯的抗炎活性IC50值为19.4μM,阳性对照白藜芦醇的IC50值32.7μM。表明本发明提供的化合物3,4’-二羟基-5-O-香叶基二苯乙烯具有良好的抗炎活性,明显优于阳性对照,可用于制备抗炎护肤品、药品或食品。
以上仅是本发明的优选实施方式,应当指出的是,上述优选实施方式不应视为对本发明的限制,本发明的保护范围应当以权利要求所限定的范围为准。对于本技术领域的普通技术人员来说,在不脱离本发明的核心技术和范围内,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (9)
2.一种制备权利要求1所述的3,4’-二羟基-5-O-香叶基二苯乙烯的方法,其特征在于,用体积分数30~95%乙醇水溶液或热水浸提甘草,将浸提液浓缩去除乙醇后用水溶解,然后依次用石油醚、乙酸乙酯萃取,将乙酸乙酯萃取液浓缩得浸膏,浸膏经硅胶柱层析,以石油醚/乙酸乙酯为洗脱剂,从体积比100/0~60/40梯度洗脱,收集石油醚/乙酸乙酯体积比为80/20洗脱的馏分,该馏分再经反相柱层析,以乙腈/水为洗脱剂,从体积比5/95~100/0梯度洗脱,收集乙腈/水体积比为75/25洗脱的馏分,蒸发干燥即得到3,4’-二羟基-5-O-香叶基二苯乙烯。
3.根据权利要求2所述的方法,其特征在于,所述的甘草为新鲜的或干燥的甘草根茎。
4.根据权利要求2所述的方法,其特征在于,所述的用体积分数30~95%乙醇水溶液或热水浸提甘草,乙醇水溶液或水的用量是5~30mL/g甘草,浸提的温度为25~100℃,浸提时间为1~72小时。
5.根据权利要求2所述的方法,其特征在于,所述的将浸提液浓缩去除乙醇后用水溶解,是将浸提液在40~80℃下浓缩除去乙醇,再加入1~5倍体积的水溶解。
6.根据权利要求2所述的方法,其特征在于,所述的依次用石油醚、乙酸乙酯萃取,是先用石油醚萃取3~12次,再用乙酸乙酯萃取3~12次。
7.权利要求1所述的3,4’-二羟基-5-O-香叶基二苯乙烯或其盐在制备抗炎护肤品、药品或食品中的应用。
8.一种抗炎护肤品、药品或食品,其特征在于,其含有权利要求1所述的3,4’-二羟基-5-O-香叶基二苯乙烯或其盐作为活性成分。
9.甘草在制备权利要求1所述的3,4’-二羟基-5-O-香叶基二苯乙烯中的应用。
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