CN116570656A - 一种外用抗特应性皮炎的三草止痒配方精油、制备方法及应用 - Google Patents
一种外用抗特应性皮炎的三草止痒配方精油、制备方法及应用 Download PDFInfo
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Abstract
本发明公开了一种外用抗特应性皮炎的三草止痒配方精油、制备方法及应用,该配方精油包括以下原料:紫草精油2‑5mL、墨旱莲精油3‑5mL、茜草精油2‑5mL、五味子精油2‑5mL、乌梅精油2‑4mL、冰片2‑4g,诸药合用,全方共奏凉血活血、透疹消斑、滋阴养津、抗过敏之功效。本发明精油由纯中药提取,标本兼治,药效显著,副作用少,复发率低,使用依从性高,且本发明中药原材料丰富,制备工艺简单,成本低效果佳,是治疗特应性皮炎药物上的创新,具有很好的市场前景。
Description
技术领域
本发明涉及一种外用抗特应性皮炎的三草止痒配方精油、制备方法及应用,属于中医药技术领域。
背景技术
特应性皮炎(Atopic dermatitis,AD)是一种由免疫反应失衡引起的慢性、复发性、瘙痒性的皮肤顽疾,主要是以剧烈瘙痒和湿疹样皮疹为特征,常伴随皮肤红肿、干燥、剥落、糜烂等症状。AD发病于各个年龄段,且30%的儿童与8%的成年AD患者常伴有焦虑、睡眠障碍以及抑郁等症状,严重影响患者的身心健康与生活质量。目前,西医对AD的治疗多采用局部糖皮质素激素、免疫调节剂及抗组胺类药物,可暂时缓解患者的临床症状,但长期使用疗效欠佳且副作用大,不易耐受。中医认为AD病因病理多为脾肺气虚、心火亢盛,外感风湿之邪蕴藉体内化热所致。根据病理辩证论治的中医药思维在治疗AD中疗效确切,副作用小,具有显著的优势。在中医理论指导下,内服中药可改善AD患者体质、提高睡眠质量、缓解神经焦虑等临床症状,取得了较好疗效。但内服中药使用不便且口感欠佳,长期服用对患者是巨大的挑战。而外用中药组方携带方便、疗效确切、直达病灶,具有明显的临床优势,所以探索方便高效的治疗特应性皮炎的中药外治创新药物具有重要意义。
发明内容
针对现有技术的不足,本发明的目的是提供一种外用抗特应性皮炎的三草止痒配方精油、制备方法及应用,能够有效治疗特应性皮炎。
为了实现上述目的,本发明的技术方案之一是:
一种外用抗特应性皮炎的三草止痒配方精油,包括以下原料:紫草精油2-5mL、墨旱莲精油3-5mL、茜草精油2-5mL、五味子精油2-5mL、乌梅精油2-4mL、冰片2-4g。
优选的,所述的精油包括以下原料:紫草精油3mL、墨旱莲精油3mL、茜草精油3mL、五味子精油3mL、乌梅精油2mL、冰片3g。
本发明的技术方案之一是:一种所述精油的制备方法,包括以下步骤:
(1)精油的制备
a.紫草精油、墨旱莲精油、五味子精油、乌梅精油:称量一定量的紫草、墨旱莲、五味子或乌梅,加入超纯水浸泡,加入沸石后回流提取,收集得到紫草精油、墨旱莲精油、五味子精油或乌梅精油;
b.茜草精油:将干燥茜草粉碎,称量一定量的茜草,加入超纯水浸泡,加入沸石后回流提取,得到黄色晶片状固体,收集黄色晶片状固体并干燥;将干燥晶片状固体溶解于甜杏仁基底油中配制成茜草精油;
(2)量取紫草精油、墨旱莲精油、茜草精油、五味子精油、乌梅精油,混合,加入混合精油等体积的甜杏仁基底油稀释,加入冰片溶解混匀制成。
进一步,紫草粉或墨旱莲先粉碎至4-6mm,再加入超纯水浸泡。
进一步,超纯水的加入量为8-12倍重量。
进一步,浸泡时间为2-3h。
进一步,回流提取温度为80-90℃。
进一步,步骤b中干燥晶片状固体和甜杏仁基底油的比例为20-40mg:4-8mL。
优选的,步骤b中干燥晶片状固体和甜杏仁基底油的比例为30mg:6mL。
本发明的技术方案之一是:一种所述精油在制备抗特应性皮炎药物中的应用。
有益效果
历代治疗风证皮肤病的名方中均遵循“治风先治血,血行风自灭”之法,本发明的三草止痒配方精油由紫草、茜草、墨旱莲、五味子、乌梅、冰片组成,其中以甘寒咸紫草为君,气味芳香,清中有透散之力,清热凉血,活血解毒,透疹消斑。以茜草、墨旱莲为臣,增强紫草凉血通经之效,既能活血祛瘀,又能滋补肝肾。以乌梅,五味子为佐,乌梅酸涩平,生津,敛肺,药理实验证明具有抗过敏的作用。五味子酸甘温,益气生津,补肾宁心,收敛固涩,药性甘温,可助诸药畅达周身,以助紫草养阴凉血之功。以辛苦微寒之冰片为使,其气走窜,清中有透散之力。诸药合用,全方共奏凉血活血、透疹消斑、滋阴养津、抗过敏之功效,有效用于治疗特应性皮炎。
本发明精油由纯中药提取,标本兼治,药效显著,副作用少,复发率低,使用依从性高,且本发明中药原材料丰富,制备工艺简单,成本低效果佳,是治疗特应性皮炎药物上的创新,具有很好的市场前景。
附图说明
图1为不同浓度精油对细胞活性的影响(n=5)。
图2为三草止痒配方精油对AD小鼠脏器指数的影响(n=6)。与空白组比,##P<0.01;与模型组比,**P<0.01。
图3为三草止痒配方精油对加强刺激后AD小鼠搔抓次数的影响(n=6)。与空白组比,##P<0.01;与模型组比,**P<0.01。
图4为三草止痒配方精油对AD小鼠耳肿胀度的影响(n=6)。与空白组比,##P<0.01;与模型组比,**P<0.01。
图5为三草止痒配方精油对AD小鼠皮肤病理状态的影响。
图6为三草止痒配方精油对AD小鼠血清中TNF-α、IL-6水平的影响(n=6)。与空白组比,##P<0.01;与模型组比,**P<0.01。
图7为三草止痒配方精油对AD小鼠血清中IgE水平的影响(n=6)。与空白组比,##P<0.01;与模型组比,**P<0.01。
具体实施方式
以下结合实施例对本发明的具体实施方式作进一步详细说明。
实施例1:精油的制备
紫草精油:将干燥紫草粉碎至4-6mm碎段,称量一定量的紫草碎段于圆底烧瓶中,加入10倍重量的超纯水,浸泡2h,加入沸石后将圆底烧瓶置于加热套中,连接精油提取装置,80-90℃温度条件下回流提取(冷凝管温度保持15-25℃),直至不再出现精油液滴,收集得到紫草精油。
墨旱莲精油:将干燥墨旱莲粉碎至4-6mm碎段,称量一定量的墨旱碎段莲于圆底烧瓶中,加入10倍重量的超纯水,浸泡2h,加入沸石后将圆底烧瓶置于加热套中,连接精油提取装置,80-90℃温度条件下回流提取(冷凝管温度保持15-25℃),直至不再出现精油液滴,收集得到墨旱莲精油。
茜草精油:将干燥茜草粉碎至4-6mm碎段,称量一定量的茜草碎段于圆底烧瓶中,加入10倍重量的超纯水,浸泡2h,加入沸石后将圆底烧瓶置于加热套中,连接精油提取装置,80-90℃温度条件下回流提取(冷凝管温度保持15-25℃),得到黄色晶片状固体,收集黄色晶片状固体并用无水硫酸钠进行干燥;称量30mg干燥晶片状固体溶解于6mL甜杏仁基底油中配制成茜草精油。
五味子精油:称量一定量的五味子于圆底烧瓶中,加入8倍重量的超纯水,浸泡3h,加入沸石后将圆底烧瓶置于加热套中,连接精油提取装置,80-90℃温度条件下回流提取(冷凝管温度保持15-25℃),直至不再出现精油液滴,收集得到五味子精油。
乌梅精油:称量一定量的乌梅于圆底烧瓶中,加入12倍重量的超纯水,浸泡2h,加入沸石后将圆底烧瓶置于加热套中,连接精油提取装置,80-90℃温度条件下回流提取(冷凝管温度保持15-25℃),直至不再出现精油液滴,收集得到乌梅精油。
实施例2:三草止痒配方精油
一种外用抗特应性皮炎的三草止痒配方精油,包括以下原料:紫草精油3mL、墨旱莲精油3mL、茜草精油3mL、五味子精油3mL、乌梅精油2mL、冰片3g。
其制备方法为:量取紫草精油3mL、墨旱莲精油3mL、茜草精油3mL、五味子精油3mL、乌梅精油2mL,混合,加入混合精油等体积的甜杏仁基底油(14mL)稀释后,加入冰片3g溶解混匀制成。
实施例3:三草止痒配方精油
一种外用抗特应性皮炎的三草止痒配方精油,包括以下原料:紫草精油2mL、墨旱莲精油5mL、茜草精油5mL、五味子精油2mL、乌梅精油3mL、冰片4g。
其制备方法同实施例2。
实施例4:三草止痒配方精油
一种外用抗特应性皮炎的三草止痒配方精油,包括以下原料:紫草精油5mL、墨旱莲精油4mL、茜草精油2mL、五味子精油5mL、乌梅精油4mL、冰片2g。
其制备方法同实施例2。
实验例1:细胞实验
1实验材料与试剂
小鼠单核RAW264.7巨噬细胞,胎牛血清(FBS)购自赛业生物科技有限公司;噻唑兰(MTT)、DMEM培养基均购自北京索莱宝科技有限公司;小鼠肿瘤坏死因子-α(TNF-α)ELISA试剂盒购自MABTECH瑞典生物科技公司;脂多糖(LPS)购自西格玛奥德里奇(上海)贸易有限公司;Griess试剂盒购置于上海碧云天生物技术有限公司。
2 实验方法
2.1 细胞培养
RAW264.7巨噬细胞用含10%(v/v)FBS的DMEM培养基(高糖)在37℃、5% CO2恒温培养箱中培养,每24h更换培养基,细胞生长至80-90%进行传代,待细胞状态稳定后,以促炎介质NO和促炎症因子TNF-α为指标,对配方精油进行分析。
2.2精油配制
取本发明实施例1制备的精油(茜草精油以干燥晶片状固体为样品),利用DMEM培养基配制成紫草(A)、茜草(B)、墨旱莲(C)、五味子(D)和乌梅(E)的单方储备溶液,并按照A:B:C:D:E质量比为3:3:3:3:2的比例进行混合配制成不同浓度的配方精油储备溶液。
2.3MTT法评价配方精油对细胞活力的影响
将RAW264.7巨噬细胞分为无细胞空白组、正常对照组及配方精油给药组,每组重复5孔,利用对数生长期的细胞,接种5×104个/孔细胞于96孔板中,在37℃、5% CO2的培养箱中培养过夜,弃上清,无细胞空白组、正常对照组分别加入DMEM培养基100μL,给药组分别加入配方精油总浓度为23.5、47.0、70.5、94.0、117.5μg/mL的含药DMEM培养基100μL(以47.0μg/mL为例说明组成:分别含有10.0μg/mL的A、B、C、D,7.0μg/mL的E),继续培养24h后,加入10μL浓度为5mg/mL的MTT溶液,继续培养4h,弃去96孔板中溶液,加入150μL的二甲基亚砜(DMSO),在490nm下测定吸光度(OD)。
细胞存活率=[OD(给药组)-OD(空白组)]/[OD(对照组)-OD(空白组)]×100%。
2.4Griess法检测NO的含量
将RAW264.7巨噬细胞分为精油各配方给药组(包括A,B,C,D,E,A+B,A+B+C,A+B+C+D,A+B+C+D+E)、空白对照组(CON)、模型组(LPS)及阳性药地塞米松组(DEX),每组3孔。取对数生长期细胞,2×105个/孔接种于24孔板,于37℃、5% CO2的恒温培养箱中培养过夜,弃上清,CON组加500μL DMEM培养基,LPS组加500μL含1.0μg/mL LPS的DMEM培养基,精油给药组分别加500μL给药浓度为42.0μg/mL A,42.0μg/mL B,42.0μg/mL C,42.0μg/mL D,42.0μg/mL E,42.0μg/mL(21.0μg/mL A+21.0μg/mL B),42.0μg/mL(14.0μg/mL A+14.0μg/mL B+14.0μg/mL C),42.0μg/mL(10.5μg/mL A+10.5μg/mL B+10.5μg/mL C+10.5μg/mL D)和42.0μg/mL(9.0μg/mL A+9.0μg/mL B+9.0μg/mL C+9.0μg/mL D+6.0μg/mL E)的含1.0μg/mL LPS的DMEM培养基,DEX组加500μL含5μg/mL DEX的DMEM培养基,继续培养24h,取上清,备用。使用Griess试剂盒测定NO浓度,取50μL细胞培养上清,分别加入50μL Griess I和50μLGriess II,于540nm波长下测定OD值,用亚硝酸盐标准品配制系列浓度样品制作标准曲线,带入标准曲线计算NO浓度。
2.5ELISA法检测TNF-α水平
取2.4部分细胞上清,按照TNF-α检测试剂盒说明书测定细胞上清中TNF-α的含量。
3实验结果
3.1配方精油对细胞活力的影响
结果如图1所示,与对照组相比,当给药浓度升至117.5μg/mL时,影响了细胞的正常生长(P<0.01),当给药浓度≤94.0μg/mL时,对细胞存活率几乎没有影响。鉴于高浓度与培养基互溶性偏低,最终选择42.0μg/mL作为精油总浓度用于后续实验。
3.2精油各组方对LPS诱导的RAW264.7细胞产生NO的影响
NO是炎症反应和免疫应答中的重要调节因子,由一氧化氮合酶(NOS)催化L-精氨酸产生。在免疫性炎症发病进程中,体内NO水平异常升高,可激活NF-κB信号通路,诱导TNF-α、IL-1β等促炎因子的产生,而TNF-α增加又能激活iNOS,产生更多的NO,从而形成正反馈循环,加重炎症反应。所以在LPS诱导的巨噬细胞模型中,NO的抑制程度与良好的抗炎药效作用紧密相关,基于此对精油各组方的NO抑制作用进行了分析。结果如表1所示,LPS模型组NO含量远高于空白对照组,存在显著性差异(P<0.01),说明模型构建成功。与模型组相比,当给药DEX及各单味精油加入后,NO分泌量均减少(P<0.01),但随着单味精油的依次加入,NO的分泌量明显减少,A+B+C+D+E组成的复方三草止痒精油的效果最佳。
3.3精油各组方对LPS诱导的RAW264.7细胞TNF-α的影响
炎症是机体的自然防御机制,一般地,疾病的严重程度与细胞因子风暴所释放的细胞因子的量紧密相关,而TNF-α是急性炎症最早产生的多功能细胞因子,基于此以TNF-α为指标考察了精油组方的抗炎作用。结果如表1所示,LPS模型组TNF-α急剧升高,存在显著性差异(P<0.01)。与模型组相比,当给药DEX及各单味精油后,TNF-α分泌量均减少(P<0.01),且随着单味精油依次加入,TNF-α的抑制作用明显增强,A+B+C+D+E组成的复方三草止痒精油的效果最佳。另外值得一提的是无论是单方或是组方精油的TNF-α作用均优于阳性药组地塞米松,突出了精油在抗炎和免疫调节中优异的药效作用。基于此,在后续的活体实验中,本发明选择了A+B+C+D+E组成的三草止痒配方精油进行进一步的研究。
表1组方精油对细胞中NO水平及TNF-α的影响(n=5)
注:与对照组比,##P<0.01;与模型组比,**P<0.01。
实验例2:动物实验
1实验材料
1.1实验动物
BALB/c小鼠,SPF级,30只,雄性,体重18-22g,由山东省济南朋悦实验动物繁育有限公司提供,许可证号:SCXK(鲁)20190003。实验单位使用许可证号:SCXK(豫)2020-0004。于25℃恒温环境中饲养,给予无菌纯水和饲料,昼夜交替照明。
1.2实验试剂及药物
本发明实施例2制备的三草止痒配方精油。二硝基氯苯(DNCB),购制于Sigma-Aldrich公司,批号:BCCD8094;丁酸氢化可的松乳膏,天津金耀药业有限公司,国药准字H10940095。丙酮,烟台市双双化工有限公司;橄榄油,西班牙贝蒂斯(Betis)橄榄油公司。
2造模与给药
将小鼠随机分为空白组(对照组)、模型组、阳性药组、精油低剂量组、精油高剂量组共5组,每组6只。小鼠适应性喂养一周后,于小鼠背部剃毛操作,并在第一二两天连续涂1%DNCB丙酮-橄榄油溶液(4:1)100μL于剃毛处(首先配制体积比为4:1的丙酮橄榄油溶液,然后称量200mg的DNCB粉末溶解于20mL丙酮-橄榄油(4:1,v/v)溶液中,即可得到1%DNCB丙酮-橄榄油溶液),空白组不涂抹。涂抹处出现结痂,组织液渗出,红肿等症状则说明造模成功。第5天用0.5% DNCB丙酮-橄榄油溶液(4:1)20μL涂抹在各组小鼠右耳内外侧进行激发一次,第5~8天分别给予药物治疗,低剂量组涂复方精油0.01mL、高剂量组涂0.02mL,阳性组涂丁酸氢化可的松乳膏0.01g,模型组与空白组不做处理。后续(第9天开始)继续使用一次激发,四次给药(激发当天及后续三天),此4天为1个加强刺激周期,共进行4个周期,于第4个周期结束当天取材。在第3、4次加强刺激过后,各组小鼠在10min之内记录其抓挠右侧耳朵、颈部、以及后背的皮肤次数,连续搔抓记为1次。第四次加强刺激5h之后在各组小鼠左侧耳朵和右侧耳朵相同的部位用游标卡尺测量其厚度,平行测量3次,计算小鼠耳肿胀度(耳肿胀厚度=右侧耳朵厚度-左侧耳朵厚度)。取样前称量小鼠体重,取血后将其解剖,称量其脾脏组织,用脾脏重量/体重,就可以得到脏器指数。取出的血液离心后取血清,测定TNF-a、IL-6和IgE含量;并对小鼠皮损部位皮肤做病理切片,观察其病理改变。
3实验结果
3.1三草止痒配方精油对特应性皮炎小鼠脏器指数的影响
在DNCB所致特应性皮炎小鼠模型中,以丁酸氢化可的松乳膏为阳性药,比较了高、低剂量的三草止痒配方精油对动物脏器指数的影响。结果如图2所示,造模后,模型组的肺组织脏器指数显著升高(P<0.01);而给药后,阳性药组、低精油剂量组和高精油剂量组的脏器指数均显著回调(P<0.01),且高低精油剂量组与阳性药组无显著性差异,说明三草止痒配方精油可有效降低特应性皮炎小鼠肿胀的现象。
3.2三草止痒配方精油对特应性皮炎小鼠搔抓次数的影响
皮肤瘙痒是特应性皮炎的典型特征,所以在采用治疗几天后,对第三次和第四次加强刺激后各组小鼠在10min之内抓挠右侧耳朵、颈部、以及后背的皮肤次数进行分析,以考察精油的止痒作用。结果如图3所示,加强刺激后,与空白组小鼠相比,模型组小鼠出现显著的搔抓现象(P<0.01),而阳性药及高、低剂量精油组小鼠均出现了明显的好转(P<0.01),且高剂量精油组要优于阳性药组。同时,值得注意的是,第四次刺激后,精油高低剂量组小鼠搔抓次数相比于第三次出现了明显的减少(P<0.05),说明三草止痒配方精油具有优异的去痒的药效。
3.3三草止痒配方精油对特应性皮炎小鼠耳肿胀度的影响
耳肿胀度是衡量动物过敏严重程度的重要指标,所以在第四次刺激5h后,使用游标卡尺测量各组小鼠左右耳相同部位的厚度,计算小鼠耳肿胀度。结果如图4所示,与空白组相比,模型组小鼠的右耳肿胀的程度明显较高(P<0.01);与模型组小鼠相比,阳性药组、三草止痒配方精油高、低剂量组的右耳肿胀的程度明显地减轻(P<0.01),且精油高低剂量组均优于阳性药组。
3.4三草止痒配方精油对特应性皮炎小鼠皮肤组织病理变化的影响
正常空白组小鼠表皮细胞排列有序,厚度正常,各层次清晰,无明显水肿和炎性细胞浸润现象,与空白组相比,模型组小鼠皮肤表皮明显增厚,过度角化,棘层肥厚,真皮层水肿,并伴有大量炎性细胞浸润。阳性药及精油高低剂量组治疗后,与模型组相比,组织水肿,炎性细胞浸润、角化等现象均有明显改善,说明配方精油能显著改善特应性皮炎的病理状态(图5)。
3.5三草止痒配方精油对特应性皮炎小鼠血清中TNF-α、IL-6的影响
血清中TNF-α可促使淋巴细胞进入机体,释放大量的细胞因子,使机体炎症反应加剧;而IL-6是调节机体免疫力的重要的细胞因子,可诱导C反应蛋白的形成和炎性细胞的聚集,进而释放更多的炎性介质加重病情,所以血清中TNF-α和IL-6水平是衡量机体特应性皮炎程度的重要指标。基于此对小鼠血清中TNF-α、IL-6进行分析,结果如图6所示,与空白组相比,模型组小鼠体内TNF-α、IL-6均显著升高(P<0.01);而给药后,与模型组相比,阳性药组与三草止痒配方精油高低剂量组均降低两者的含量(P<0.01),出现显著的回调现象,说明三草止痒配方精油通过抑制细胞因子的表达有效控制了小鼠体内的炎症反应。
3.6三草止痒配方精油对特应性皮炎小鼠血清中IgE的影响
AD发病原因复杂,与遗传、免疫及皮肤屏障功能受损等有关,其中多种原因协同过敏原激活免疫通路导致B细胞释放过多的IgE在AD致病过程中扮演重要作用。所以小鼠血清中IgE含量是衡量AD是否严重的重要指标。结果如图7所示,与空白组相比,模型组小鼠IgE含量显著升高(P<0.01);而与模型组相比,三草止痒配方精油高低剂量组均显著降低IgE的含量(P<0.01),与阳性药组和空白组不存在显著性差异,展现出三草止痒配方精油抗过敏的药效作用。
实验例3:临床应用
在动物实验确保安全的基础上,经临床试用效果非常好,有关资料如下:
经对门诊确诊的特应性皮炎患者30例,其中男14例,女16例,按照剂量50μL/cm2的量在患处进行涂抹,一天两次,连用两周进行药效评价。疗效评价标准:显著有效:皮损面积恢复80%及以上,瘙痒等症状消失或基本消失;有效:皮损面积恢复80%以下,30%及以上,瘙痒等症状减轻;无效:皮损恢复低于30%,瘙痒等症状无改善。
结果显示,经过两周的治疗,30例的患者中,有14例疗效显著,占比46.7%(显著有效);15例瘙痒减轻,皮损有明显恢复,占比50%(有效);无效病例1例,占比为3.3%(无效);总有效率高达96.7%,说明本发明所用三草止痒配方精油具有较好的抗特应性皮炎的作用。
结论
由以上实验结果可知,本发明原料丰富,生产制备简单方便,疗效好,具有明显的凉血活血、透疹消斑、抗过敏之功效,是治疗特应性皮炎药物上的创新,具有很好的市场前景。
Claims (10)
1.一种外用抗特应性皮炎的三草止痒配方精油,其特征在于,包括以下原料:紫草精油2-5mL、墨旱莲精油3-5mL、茜草精油2-5mL、五味子精油2-5mL、乌梅精油2-4mL、冰片2-4g。
2.根据权利要求1所述的精油,其特征在于,包括以下原料:紫草精油3mL、墨旱莲精油3mL、茜草精油3mL、五味子精油3mL、乌梅精油2mL、冰片3g。
3.一种权利要求1或2所述精油的制备方法,其特征在于,包括以下步骤:
(1)精油的制备
a.紫草精油、墨旱莲精油、五味子精油、乌梅精油:称量一定量的紫草、墨旱莲、五味子或乌梅,加入超纯水浸泡,回流提取,收集得到紫草精油、墨旱莲精油、五味子精油或乌梅精油;
b.茜草精油:将干燥茜草粉碎,称量一定量的茜草,加入超纯水浸泡,回流提取,得到黄色晶片状固体,收集黄色晶片状固体并干燥;将干燥晶片状固体溶解于基底油中配制成茜草精油;
(2)量取紫草精油、墨旱莲精油、茜草精油、五味子精油、乌梅精油,混合,加入混合精油等体积的基底油稀释,加入冰片溶解混匀制成。
4.根据权利要求3所述的制备方法,其特征在于,紫草粉或墨旱莲先粉碎至4-6mm,再加入超纯水浸泡。
5.根据权利要求3所述的制备方法,其特征在于,超纯水的加入量为8-12倍重量。
6.根据权利要求3所述的制备方法,其特征在于,浸泡时间为2-3h。
7.根据权利要求3所述的制备方法,其特征在于,回流提取温度为80-90℃。
8.根据权利要求3所述的制备方法,其特征在于,步骤b中干燥晶片状固体和基底油的比例为20-40mg:4-8mL。
9.根据权利要求8所述的制备方法,其特征在于,步骤b中干燥晶片状固体和基底油的比例为30mg:6mL。
10.一种如权利要求1或2所述精油在制备抗特应性皮炎药物中的应用。
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