CN113518611B - 用于增强皮肤吸收的多层阳离子脂质体及其制备方法 - Google Patents
用于增强皮肤吸收的多层阳离子脂质体及其制备方法 Download PDFInfo
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- CN113518611B CN113518611B CN202080017531.5A CN202080017531A CN113518611B CN 113518611 B CN113518611 B CN 113518611B CN 202080017531 A CN202080017531 A CN 202080017531A CN 113518611 B CN113518611 B CN 113518611B
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- cationic
- ceramide
- skin
- cholesterol
- liposome
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Abstract
涉及一种用于增强皮肤吸收的多层阳离子脂质体,与包括该脂质体的化妆品组合物及其制备方法。
Description
本申请要求享有2019年9月24日提交的韩国专利申请第10-2019-0117490号的优先权,并且所述说明书的整体为本申请的参考文献。
技术领域
涉及一种用于增强皮肤吸收的多层阳离子脂质体,与包括该脂质体的化妆品组合物及其制备方法。
背景技术
皮肤由表皮、真皮以及皮下脂肪层组成,并且作为人体最外层的膜,其在保护身体免受有害环境影响和维持稳态(Homeostasis)方面起着重要作用。其中,作为表皮最外层的角质层由属于蛋白质成分的角质细胞(corneocyte)和细胞间脂质组成。特别地,细胞间脂质由神经酰胺、胆固醇以及游离脂肪酸等组成,并且起到皮肤屏障的作用,如阻断有害物质经皮肤侵入以及维持皮肤水分等。然而,在有效吸收各种有效成分方面,角质层的所述皮肤屏障功能却成为阻碍因素。
在用于增强功效物质分皮肤吸收方面,脂质体是广为人知的代表性药物输送系统。由于脂质体由属于生物体内物质的磷脂组成,具有较高的生物相容性,因此广泛用于化妆品或医药品领域。另外,脂质体内部有亲水性空间,并且具有可以在双层或多层结构之间装载疏水性物质的特点,因此有利于将各种功效物质输送至皮肤。根据形成膜的组成成分,脂质体可以制备成醇质体、弹性脂质体、聚合物涂覆的脂质体、阳离子脂质体等,并且每种脂质体将有效成分输送至皮肤的原理不同。其中,阳离子脂质体为由阳离子脂质组成的脂质体,其通过静电引力容易地与带有负电荷的皮肤表面接触,从而增强有效成分吸收到皮肤内。
因此,为了提高有效成分的皮肤吸收率,需要研发具有优异的生物相容性和较高的皮肤粘附性的阳离子脂质体。另外,为了增加与皮肤的相似性,需要研发含有神经酰胺和胆固醇等细胞间脂质成分的脂质体。
发明内容
技术问题
一方面提供一种阳离子脂质体(cationic liposome)组合物,其包括阳离子脂质、神经酰胺以及胆固醇。
另一方面提供一种化妆品组合物,其包括阳离子脂质体,其中,所述阳离子脂质体包括磷脂层与装载物质,所述磷脂层包括阳离子脂质、胆固醇以及神经酰胺;所述装载物质装载于所述磷脂层内部且包括水溶性皮肤活性物质或油溶性皮肤活性物质。
另一方面提供一种阳离子脂质体组合物的制备方法,其中,所述阳离子脂质体组合物包括阳离子脂质、神经酰胺以及胆固醇。
技术方案
一方面提供一种阳离子脂质体(cationic liposome)组合物,其包括阳离子脂质、神经酰胺以及胆固醇。
另一方面提供一种化妆品组合物,其包括阳离子脂质体,其中,所述阳离子脂质体包括磷脂层与装载物质,所述磷脂层包括阳离子脂质、胆固醇以及神经酰胺;所述装载物质装载于所述磷脂层内部且包括水溶性皮肤活性物质或油溶性皮肤活性物质。
本说明书中的术语“脂质体”指的是,被微小的球形膜围住的直径约为50至2000nm的囊泡(vesicle),并且是包括被脂质双层围住的所有分区的概念。
说明书中的术语“阳离子脂质”指的是,在所选pH(例如,生理pH)下具有正净电荷的脂质,并且所述生理pH可以是指6至8,具体地为6.5至8,更具体地为7.5的pH。
所述阳离子脂质可以是二甲基二-十八烷基溴化铵(DDA)、1,2-二油酰基-3-三甲基铵-丙烷、3β-[N-(N',N'-二甲基氨基乙烷)氨基甲酰基]胆固醇(3β-[N-(N',N'-dimethylaminoethane)carbamoyl]cholesterol,DC-Chol)、1,2-二油酰基-3-三甲基铵-丙烷(DODAP)、1,2-二-O-十八碳烯基-3-三甲基丙烷铵(1,2-di-O-octadecenyl-3-trimethylammonium propane,DOTMA)、1,2-二肉豆蔻油酰基-sn-甘油基-3-乙基磷酰胆碱(1,2-dimyristoleoyl-sn-glycero-3-ethylphosphocholine,14:1Etyle PC)、1-棕榈酰基-2-油酰基-sn-甘油基-3-乙基磷酰胆碱(1-palmitoyl-2-oleoyl-sn-glycero-3-ethylphosphocholine,16:0-18:1Ethyl PC)、1,2-二油酰基-sn-甘油基-3-乙基磷酰胆碱(1,2-dioleoyl-sn-glycero-3-ethylphosphocholine,18:1Ethyl PC)、1,2-二硬脂酰基-sn-甘油基-3-乙基磷酰胆碱(1,2-distearoyl-sn-glycero-3-ethylphosphocholin,18:0Ethyl PC)、1,2-二棕榈酰基-sn-甘油基-3-乙基磷酰胆碱(1,2-dipalmitoyl-sn-glycero-3-ethylphosphocholine,16:0Ethyl PC)、1,2-二肉豆蔻酰基-sn-甘油基-3-乙基磷酰胆碱(1,2-dimyristoyl-sn-glycero-3-ethylphosphocholine,14:0Ethyl PC)、1,2-二月桂酰基-sn-甘油基-3-乙基磷酰胆碱(1,2-dilauroyl-sn-glycero-3-ethylphosphocholin,12:0Ethyl PC)、N1-[2-((1S)-1-[(3-氨基丙基)氨基]-4-[二(3-氨基-丙基)氨基]丁基甲酰胺基)乙基]-3,4-二[油酰氧基]-苯甲酰胺(N1-[2-((1S)-1-[(3-aminopropyl)amino]-4-[di(3-amino-propyl)amino]butylcarboxamido)ethyl]-3,4-di[oleyloxy]-benzamide,MVL5)、1,2-二肉豆蔻酰基-3-二甲基铵-丙烷(1,2-dimyristoyl-3-dimethylammonium-propane,14:0DAP)、1,2-二棕榈酰-3-二甲基铵-丙烷(1,2-dipalmitoyl-3-dimethylammonium-propane,16:0DAP)、1,2-二硬脂酰-3-二甲基铵-丙烷(1,2-distearoyl-3-dimethylammonium-propane,18:0DAP)、N-(4-羧基苄基)-N,N-二甲基-2,3-双(油酰氧基)丙-1-胺(N-(4-carboxybenzyl)-N,N-dimethyl-2,3-bis(oleoyloxy)propan-1-aminium,DOBAQ)、1,2-硬脂酰-3-三甲基铵-丙烷(1,2-stearoyl-3-trimethylammonium-propane,18:0TAP)、1,2-二棕榈酰基-3-三甲基铵-丙烷(1,2-dipalmitoyl-3-trimethylammonium-propane,16:0TA)、1,2-二肉豆蔻酰基-3-三甲基铵-丙烷(1,2-dimyristoyl-3-trimethylammonium-propane,14:0TAP)、N4-胆固醇-精胺(N4-Cholesteryl-Spermine,GL67)、聚季铵盐-10(Polyquaternium-10)、聚季铵盐-7(Polyquaternium-7)、瓜尔胶羟丙基三甲基氯化铵(Guar HydroxypropyltrimoniumChloride)、椰油酰胺丙胺氧化物(Cocamidopropylamine Oxide)、硬脂酰胺丙基二甲胺(Stearamidopropyl Dimethylamine)或它们的组合。
本说明书中的术语“神经酰胺”指的是一种鞘脂,已知鞘脂具有通过去除被内部和外部压力损伤的细胞,来保护皮肤免受压力的功能,所述神经酰胺可以是神经酰胺EOP、神经酰胺NS、神经酰胺NP、神经酰胺AS、神经酰胺EOS、神经酰胺AP、神经酰胺NDS、葡萄糖神经酰胺、ω羟基神经酰胺或它们的组合。
本说明书中的术语“胆固醇”是皮肤角质结构中的主要成分,其与神经酰胺、脂肪酸一同构成细胞膜系统,所述胆固醇可以是胆固醇、氯化胆固醇、胆固醇辛酸酯、胆固醇壬酸酯、胆固醇油醇碳酸酯、胆固醇异硬脂基碳酸酯或它们的组合。
所述阳离子脂质体组合物可以具有多层结构。所述术语“多层结构”可以是指,用于区分外伤和内伤的由三层或更多层组成的结构,由于所述阳离子脂质体组合物具有多层结构,因此在有效成分的装载与有效成分的皮肤渗透方面,显示出更有利的效果。具体地,所述阳离子脂质体可以具有多层结构,其中水溶性皮肤活性物质位于磷脂层之间,油溶性皮肤活性物质位于磷脂层内部。如上所述,由于皮肤活性物质分离并稳定地存在于多层结构的每一层,因此可以将养分等皮肤活性物质稳定地输送到皮肤的真皮层,且不损坏输送系统。在一具体实施方案中,使用透射电子显微镜观察阳离子脂质体和普通脂质体的结果显示,包括1,2-二油酰基-3-三甲基铵-丙烷、胆固醇以及神经酰胺而制备的阳离子脂质体显示出多层结构,与此相反普通脂质体显示出双层(bilayer)结构。
所述神经酰胺和胆固醇的重量比可以是1至10:40至60,例如,1至10:45至60,例如,1至8:40至55,例如,1至6:40至55,例如,1至6:45至55,例如,1至4:40至55,例如,1至4:45至55,例如,1至3:40至55,例如,1至3:45至55。如果在所述重量比中神经酰胺的比例增加,可能会因结晶而发生沉淀现象,如果胆固醇的比例增加,膜会变得过于坚固,因而可能会对有效成分的释放造成不利影响。
所述阳离子脂质体的ζ电位可以显示出正电位。在中性pH条件下,所述阳离子脂质体的ζ电位可以是1至80mV,例如5至75mV,例如10至60mV,例如15至55mV,例如20至55mV。在一具体实施方案中,确认到测量不包括阳离子脂质的普通脂质体ζ电位的结果为负值,与此相反,测量包括1,2-二油酰基-3-三甲基铵-丙烷、胆固醇以及神经酰胺而制备的阳离子脂质体ζ电位的结果为正值。
所述阳离子脂质体组合物可以通过本领域已知的方法来制备,例如,可以通过薄膜水合法(thin film hydration method)来制备。例如,可以通过将这些物质的水溶液用作水溶性(亲水性)物质的水合液(hydrating fluid),或在脂质体制备过程中的某个步骤中添加药物或药液,来制备捕集(entrapped)水溶性物质的脂质体。另外,脂溶性(疏水性)物质可以通过溶解于构成脂质的有机溶液中后,经蒸发形成干燥的含药物脂质膜,然后进行水合来制备。
由于所述化妆品组合物包括阳离子脂质体,因此包括在化妆品组合物中的有效成分的皮肤渗透和皮肤吸收程度可以显著增强。一具体实施方案中,确认到将作为有效成分的烟酰胺包合至阳离子脂质体或普通脂质体后,对其皮肤渗透程度进行比较后的结果显示,相比于普通脂质体,包合至包括1,2-二油酰基-3-三甲基铵-丙烷、胆固醇和神经酰胺而制备的阳离子脂质体的烟酰胺,其皮肤渗透与皮肤吸收程度显著增加。
所述水溶性或油溶性皮肤活性物质可以是指,能够给皮肤带来积极的效果或作用的物质,例如,其可以显现出包括抗氧化、皮肤美白、强化皮肤屏障、改善皮肤弹性、改善皮肤皱纹、保护皮肤免受紫外线损伤、恢复被紫外线损伤的皮肤、皮肤保湿、促进皮肤再生、改善皮肤炎症、防止皮肤老化等在内的各种皮肤改善效果。
所述水溶性皮肤活性物质可以是烟酰胺、抗坏血酸、腺苷、植物提取物或它们的组合。
所述油溶性皮肤活性物质可以是视黄醇、视黄醇乙酸酯、棕榈酸视黄酯、辅酶Q10、α-生育酚、生育酚乙酸酯、植物提取物、植物提取物精油或它们的组合。
所述化妆品组合物的剂型只要是常规化妆品的剂型就没有限制,但其可以是例如,柔肤水、收敛水或营养护肤水等化妆水,营养霜、按摩霜、精华、眼霜、眼部精华、卸装膏、洁面乳、卸妆水、面膜、粉饼、润肤露、润肤霜、润肤油或润肤精华。
所述化妆品组合物可以进一步包括,防腐剂、稳定剂、表面活性剂、增溶剂、保湿剂、润肤剂、紫外线吸收剂、防腐剂、杀菌剂、抗氧化剂、pH调节剂、有机和无机颜料、香料、凉味剂或限制剂等。所属领域的技术人员可在不损害本发明的目的和效果的范围内,容易地选择所述保湿剂等添加成分的调配量。
另一方面提供一种阳离子脂质体组合物的制备方法,其中,所述阳离子脂质体组合物包括阳离子脂质、神经酰胺以及胆固醇。所述阳离子脂质、神经酰胺、胆固醇以及阳离子脂质体组合物等相同于以上的描述。
制备所述阳离子脂质体组合物的方法可以包括,将阳离子脂质、神经酰胺以及胆固醇溶解于有机溶剂,从而制备溶液的步骤;从所述溶液中去除溶剂,从而形成脂质膜的步骤;以及干燥和水合所述脂质膜的步骤。
所述方法还可以进一步包括均化所述干燥和水合的脂质膜的步骤。
所述有机溶剂可以是甲醇、乙醇、丙醇、异丙醇、丁醇、丙酮、乙醚、苯、氯仿、乙酸乙酯、二氯甲烷、己烷、环己烷或它们的组合,但并不特别限定于此。
有益效果
根据一方面的阳离子脂质体组合物中,脂质体所含有的有效成分的皮肤渗透程度显著高于普通脂质体,因此其可以用于增强脂质体组合物中包括的有效成分的吸收。
根据另一方面的阳离子脂质体组合物由于包括胆固醇和神经酰胺,脂质体膜的稳定性和皮肤安全性得到明显改善,因此可以安全地用作化妆品组合物。
附图说明
图1是示出阳离子脂质体、普通脂质以及不包括神经酰胺和胆固醇的阳离子脂质体,根据时间变化的平均粒径的图。
图2是示出阳离子脂质体、普通脂质以及不包括神经酰胺和胆固醇的阳离子脂质体,根据时间变化的ζ电位(mV)的图。
图3是示出以1:20的重量比包括神经酰胺和胆固醇的阳离子脂质体的粒径增加的图。
图4a是示出以1:30的重量比包括神经酰胺和胆固醇的阳离子脂质体的粒径增加的图。
图4b是示出以1:30的重量比包括神经酰胺和胆固醇的阳离子脂质体的沉淀现象的图。
图5是确认阳离子脂质体多层结构的透射电子显微镜的观察图片。
图6是示出阳离子脂质体的皮肤吸收能力得到确认的生物体外(in vitro)皮肤渗透评价结果的图。
图7是示出为了对比皮肤吸收能力已得到确认的阳离子脂质体的皮肤渗透程度,而利用人造皮肤的皮肤渗透评价结果的荧光显微镜图片。
具体实施方式
下面,将通过以下实施例进行更详细的描述。但是,这些实施例仅用于示例性描述,本发明的范围并不限于这些实施例。
实施例1、阳离子脂质体的制备
通过薄膜水合法制备阳离子脂质体。向圆烧瓶内放入Egg pc(L-α-phosphatidylcholine)、属于阳离子脂质的1,2-二油酰基-3-三甲基铵-丙烷(DOTAP:1,2-dioleoyl-3-trimethylammonium-propane)、神经酰胺以及胆固醇后,将其溶解于20mL的氯仿-甲醇(4:1)直至完全溶解,然后利用旋转蒸发器完全去除溶剂,从而在烧瓶壁上形成薄膜。将形成的脂质层真空干燥12小时完全去除残留溶剂后,添加10mL的净化水进行水合,然后利用探头超声破碎仪(probe sonicator)均化5分钟。将如此得到的脂质体溶液用0.45μm过滤器(Minisart CA 26mm)过筛后用于实验。
比较例1、普通脂质体的制备
除上述配方中的阳离子脂质1,2-二油酰基-3-三甲基铵-丙烷(DOTAP:1,2-dioleoyl-3-trimethylammonium-propane)外,普通脂质体通过上述配方与方法来制备。用于阳离子脂质体和普通脂质体的神经酰胺和胆固醇,是为了提高膜的稳定性、与生物体的相似度以及皮肤安全性。
比较例2、不包括神经酰胺和胆固醇的阳离子脂质体的制备
为评价阳离子脂质体的皮肤吸收功能,以及了解实施例的脂质体制备过程中使用的神经酰胺和胆固醇对脂质体的膜稳定性和皮肤安全性的影响,将不包括神经酰胺和胆固醇的阳离子脂质体作为比较例2来制备。具体的制备方法与所述实施例1相同。
实施例1、比较例1以及比较例2的配方如下表1。
【表1】
所述阳离子脂质体中的阳离子脂质大于或等于0.1%,或Egg PC小于或等于0.5%,或大于或等于1.0%时,可能在保管过程中出现浑浊而使其稳定性变差。另外,神经酰胺和胆固醇的重量比为1至10:40至60(w/w)时,膜稳定性最优异。如果在所述重量比中神经酰胺的比例增加,可能会因结晶而发生沉淀现象,如果胆固醇的比例增加,膜会变得过于坚固,因而可能会对有效成分的释放造成不利影响,因此维持适当的比例非常重要。
比较例3~5、根据神经酰胺和胆固醇含量变化的阳离子脂质体的制备
为评价阳离子脂质体的皮肤吸收功能,以及了解在实施例的脂质体制备过程中使用的神经酰胺和胆固醇对脂质体的膜稳定性和皮肤安全性的影响,制备了神经酰胺和胆固醇含量不同的脂质体。具体的制备方法与所述实施例1相同。
实施例2、比较例3至5的配方如下表2。
【表2】
实验例1、脂质体颗粒的物理性质评价
1.1确认粒径和ζ电位
为测量普通脂质体和阳离子脂质体的粒径和ζ电位,在中性条件(pH7)下使用了动态光散射装置(DLS,SZ-100,HORIBA)。在制备后的4周内每周测量粒径和ζ电位,结果分别示于图1至图4a。
结果如图1所示,确认到普通脂质体的粒径为180至200nm,阳离子脂质体的粒径为100至120nm,并且如图2所示,普通脂质体的ζ电位为-10至0mV,阳离子脂质体的ζ电位为20至50mV,其表面电荷为阳离子。即,随时间观察包括胆固醇和神经酰胺的实施例1的阳离子脂质体的粒径和ζ电位的稳定性后,确认到其在4周内保持了稳定的物理性质。与此相反,不包括神经酰胺和胆固醇的比较例2的阳离子脂质体,随着时间的推移显示出粒径增加的趋势。从所述结果可以确认到,胆固醇和神经酰胺对提高阳离子脂质体的膜稳定性方面,发挥重要作用。
图3是示出比较例3粒径增加的图,图4是示出比较例5粒径增加的图(4a)和沉淀现象的图(4b)。
如图3所示,可以确认到以1:20的重量比包括神经酰胺和胆固醇的比较例3的阳离子脂质体,并未出现肉眼可见的沉淀现象,但是制备1周后其尺寸从约50nm增加一倍至约100nm。另外,以1:100的重量比包括神经酰胺和胆固醇的比较例4的阳离子脂质体,在利用旋转蒸发器使得烧瓶壁上形成薄膜的步骤中发生沉淀现象,因此无法制备脂质体。另外,如图4a所示,可以确认到以1:30的重量比包括神经酰胺和胆固醇的比较例5的阳离子脂质体,由于神经酰胺的增加,制备1周后其尺寸从约100nm增加一倍或更多至约200nm,并且如4b所示,发生脂质膜塌陷和沉淀现象。因此,根据一方面的阳离子脂质体可以通过以1至10:30至60的重量比包括神经酰胺和胆固醇,来改善由于结晶而引起的沉淀问题和膜变坚固的问题。
1.2确认颗粒结构和外观
为分析脂质体的结构,将脂质体颗粒保持在超低温的状态下,使用了能够观察其原始结构的Cryo-TEM(Cryogenic transmission electron microscopy)。首先,将5μL的脂质体加载到200目蕾丝碳膜Cu-grid,然后将其用样品快速冷冻仪(vitrobot)浸入液化(约-170℃)乙烷中迅速冷冻。在200kV的加速电压下,用Cryo-TEM(Tecnai F20,FEI)观察制备的冷冻试样。
结果如图5所示,阳离子脂质体形成有利于有效成分装载和有效成分皮肤渗透的多层结构体,而普通脂质体形成双层结构体。
实验例2、生物体外(in vitro)皮肤渗透评价
为评价所述实施例1和比较例1中制备的阳离子脂质体和普通脂质体在生物体外(in vitro)条件下的有效成分的皮肤吸收效果,用弗朗茨扩散池系统(Franz diffusioncell system)进行了皮肤渗透实验。具体地,为进行皮肤渗透实验,将含有已知美白功能成分烟酰胺的普通脂质体和阳离子脂质体分别定量涂覆于人造膜(Strat-M,Merck),并且使用PBS:EtOH(8:2)作为受体相。实验在32℃下进行,涂覆8小时后通过取样口收集受体相,并且利用HPLC从收集的样品中分析烟酰胺。
为了测量8小时后保留在角质层和皮肤中的烟酰胺量,用PBS洗涤3次人造皮肤,然后用胶带剥离技术测量了保留在角质层中的烟酰胺量。皮肤角质层用胶带剥离3次后放入10mL的EtOH中,然后利用超声波清洗机萃取。经过胶带剥离技术之后角质层被去除的皮肤,在进行冲洗后与上述描述同样地放入EtOH中,并使用超声波清洗机进行萃取。利用HPLC对如此得到的试样中的烟酰胺进行定量。HPLC的分析条件如下表3。利用人造膜的皮肤渗透实验结果如图6。
【表3】
利用人造膜8小时后确认皮肤吸收效果的结果如图6所示,阳离子脂质体相比于普通脂质体,在存在于角质层的烟酰胺量(Tape),存在于除角质层之外的表皮和真皮的烟酰胺量(Membrane),渗透皮肤的量(Transdermal)以及将它们加起来的渗透总量方面,显示出显著增强的皮肤吸收能力。
实验例3、人造皮肤的皮肤渗透评价
除实验例2的结果外,还利用人造皮肤(Neoderm,TEGO SCIENCE)进行了皮肤渗透评价,以通过视觉确认实施例1的阳离子脂质体的皮肤渗透程度。具体地,向仅剩表皮层的人造皮肤滴加30μL的装载荧光试剂罗丹明B(Sigma-aldrich)的脂质体,并在37℃下温育2小时。然后,取下固定人造皮肤的支架,将分离的人造皮肤放入装有OCT(Optimal CuttingTemperature)溶液的模具中,并在80℃下保存约20分钟,然后利用冰冻切片机(LeicaCM1850,Leica Microsystems)切片成20μm大小。用共聚焦激光显微镜(Confocal LaserMicroscopy LSM-700,Zeiss)观察了切片组织。
结果如图7所示,确认到相比于普通脂质体,处理实施例1的阳离子脂质体的皮肤截面显示出更高的荧光强度,且更深地渗透到表皮的下层部。所述结果对应于实验例2中利用弗朗茨扩散池系统的生物体外皮肤渗透实验的结果。
此外,所述结果可以分析为,在所述实验中使用的荧光试剂罗丹明B作为水溶性荧光试剂捕集到脂质体核中,当捕集的荧光试剂在脂质体颗粒与细胞膜融合后分散到皮肤细胞中时,由于阳离子脂质体的表面电位与具有负电荷的皮肤表面的亲和力,其比普通脂质体显现出更高的皮肤渗透。
实验例4、皮肤安全性评价
为了比较阳离子脂质体包括神经酰胺和胆固醇时与不包括时的皮肤安全性,针对所述实施例1和比较例2进行了安全性评价。具体地,针对20名无皮肤病的成人男女,进行了如下所述实施例1和比较例2的阳离子脂质体刺激程度的评价。在受试者手臂的一半涂覆20μL的试样,密封实验部位后贴附24小时。在去除贴附剂后的30分钟和24小时后,依据CTFA指南中所示的术语(terminology)检测皮肤反应。算出按照判定标准所得的受试者的皮肤刺激指数(PII)评分的平均值后,将小于1评价为低刺激,小于2为轻度刺激,小于3.5为中度刺激,大于或等于3.5为强刺激。
【表4】
结果如所述表4所示,确认到含有神经酰胺的阳离子脂质体和普通脂质体为无刺激,因此可以安全地用作化妆品组合物,但不含有神经酰胺的比较例2的阳离子脂质体显示出刺激程度较高的低刺激。通过所述结果确认到,阳离子脂质体可以通过包括神经酰胺而提高脂质体的皮肤安全性。
通过上述结果可以确认到,所述阳离子脂质体相较于普通脂质体,脂质体中含有的有效成分的皮肤渗透程度明显更高,并且所述阳离子脂质体因包括胆固醇和神经酰胺而明显改善阳离子脂质体的膜稳定性和皮肤安全性。
Claims (8)
1. 一种阳离子脂质体(cationic liposome)组合物,其包括阳离子脂质、Egg PC、胆固醇以及神经酰胺;
其中,所述阳离子脂质为DOTAP;
其中,其以1:40至60的重量比包括所述神经酰胺和胆固醇;并且,所述阳离子脂质体具有多层结构。
2.一种化妆品组合物,其包括阳离子脂质体,其中,所述阳离子脂质体包括磷脂层与装载物质,
所述磷脂层包括阳离子脂质、Egg PC、胆固醇以及神经酰胺;
所述装载物质装载于所述磷脂层内部且包括水溶性皮肤活性物质或油溶性皮肤活性物质;
其中,所述阳离子脂质为DOTAP;其以1:40至60的重量比包括所述神经酰胺和胆固醇;并且,所述阳离子脂质体具有多层结构。
3.根据权利要求2所述的化妆品组合物,其中,所述水溶性皮肤活性物质位于磷脂层之间,油溶性皮肤活性物质位于磷脂层内部。
4.根据权利要求2所述的化妆品组合物,其中,所述阳离子脂质体的ζ电位为10至60mV。
5.根据权利要求2所述的化妆品组合物,其中,所述水溶性皮肤活性物质为烟酰胺、抗坏血酸、腺苷、植物提取物或它们的组合。
6.根据权利要求2所述的化妆品组合物,其中,所述油溶性皮肤活性物质为视黄醇、视黄醇乙酸酯、棕榈酸视黄酯、辅酶Q10、α-生育酚、生育酚乙酸酯、植物提取物或它们的组合。
7.根据权利要求6所述的化妆品组合物,其中,所述植物提取物为植物提取物精油。
8.一种阳离子脂质体组合物的制备方法,其包括:将阳离子脂质、Egg PC、神经酰胺以及胆固醇溶解于有机溶剂,从而制备溶液;
从所述溶液中去除溶剂,从而形成脂质膜;以及
干燥和水合所述脂质膜;
其中,所述阳离子脂质为DOTAP;其以1:40至60的重量比包括所述神经酰胺和胆固醇;并且,所述阳离子脂质体具有多层结构。
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KR102378946B1 (ko) * | 2021-09-03 | 2022-03-28 | 한국콜마주식회사 | 유효 성분의 포집력이 우수한 리포좀 화장료 조성물 |
CN114601766A (zh) * | 2022-03-07 | 2022-06-10 | 沈阳汇一登顶生物科技有限责任公司 | 一种含有阳离子物质的纯露仿皮肤脂类混合脂质体以及由其制备的美肤品 |
CN115105447B (zh) * | 2022-06-30 | 2023-07-28 | 山东福瑞达生物股份有限公司 | 一种具有修护功效的阳离子α葡聚糖寡糖修饰的脂质体及其制备方法和应用 |
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