CN114230815A - 实现黄酮不同部位靶向释放的乳液凝胶珠及其制备方法 - Google Patents
实现黄酮不同部位靶向释放的乳液凝胶珠及其制备方法 Download PDFInfo
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Abstract
本公开涉及一种实现黄酮不同部位靶向释放的乳液凝胶珠的制备方法,所述方法包括如下步骤:S1、黄酮分散液的制备;S2、柑橘果胶水溶液的制备;S3、黄酮乳液的制备;S4、乳液凝胶珠的制备。该方法同时以柑橘果胶为乳化剂及基质,在特定环境水溶液中,仅通过一步交联调控的滴注法,构建成分组成基本一致的小肠和结肠靶向乳液凝胶珠,进而实现黄酮在小肠和结肠两种不同的靶向递送,有助于相关功能食品的靶向设计。
Description
技术领域
本公开涉及生物材料技术领域,具体地,涉及一种实现黄酮不同部位靶向释放的乳液凝胶珠及其制备方法。
背景技术
黄酮是食品中广泛存在的一类重要功效成分,具有多种显著的健康功效。如今,口服营养制剂是补充功效成分的主要途径,口服后,其在胃肠道解体,功效成分经胃肠道上皮细胞吸收后进入体循环。众所周知,小肠是人体主要的消化和吸收场所,几乎全部消化产物的吸收都是在小肠内进行的。为了提高生物活性物质的稳定性、分散性和小肠生物利用度,已有研究设计了多种载体体系,如乳液、胶囊等。然而,营养和代谢方面的研究进展促进了人们对健康与结肠之间相互作用的深入理解。与小肠相比,结肠具有较长的转运时间和较低的酶活性,因此是一个极具吸引力的生物活性物质递送部位。通常情况下,易被胃酸破坏或胰腺酶代谢的活性物质在结肠中受到的影响最小。此外,延长的结肠转运时间可能通过增加活性物质溶解和吸收的时间来提高低水溶性活性物质的口服生物利用度。由此可见,小肠和结肠均是改善生物活性物质口服生物利用度的重要部位,针对特定部位吸收生物活性物质时,设计构建靶向递送体系是最有效的策略之一。
果胶作为非淀粉多糖可被结肠菌群产生的果胶酶完全降解,而不受胃蛋白酶或肠道酶的影响,使其成为结肠靶向载体的最佳选择。目前的研究往往集中于果胶基结肠靶向递送体系的设计与构建,只能实现单一部位的靶向,难以同时实现小肠和结肠两种不同的靶向递送。
发明内容
本公开的目的是提供一种实现黄酮不同部位靶向释放的乳液凝胶珠及其制备方法,该方法同时以柑橘果胶为乳化剂及基质,在特定环境水溶液中,仅通过一步交联调控的滴注法,构建成分组成基本一致的小肠和结肠靶向乳液凝胶珠,进而实现黄酮在小肠和结肠两种不同的靶向递送,有助于相关功能食品的靶向设计。
为了实现上述目的,本公开第一方面提供一种实现黄酮不同部位靶向释放的乳液凝胶珠的制备方法,所述方法包括如下步骤:
S1、黄酮分散液的制备:将黄酮溶解在植物油中,使用超声处理使其分散均匀,得到黄酮分散液;
S2、柑橘果胶水溶液的制备:将柑橘果胶粉末溶解在去离子水中,使用恒温磁力搅拌器连续搅拌使其分散均匀,后置于0-6℃下过夜水化,得到柑橘果胶水溶液;
S3、黄酮乳液的制备:将所述黄酮分散液和所述柑橘果胶水溶液按照质量比为0.1-5:1.9-5的比例进行混合得到混合液,将所述混合液搅拌后进行高速剪切得到黄酮粗乳液,将所述黄酮粗乳液经高压均质循环处理,得到体系均一的黄酮乳液;
S4、乳液凝胶珠的制备:采用注射器将所述黄酮乳液滴入含有酸化乙醇或金属离子水溶液中,然后反应固化,并用去离子水进行冲洗,得到乳液凝胶珠。
可选地,步骤S1中,所述超声处理条件包括:温度为25-40℃,时间为10-40min,频率为25-80kHz;
所述黄酮分散液中黄酮的质量百分比为0.1-0.5%。
可选地,步骤S2中,所述恒温磁力搅拌器处理的条件包括:温度为25-50℃,时间为4-12h;
所述柑橘果胶水溶液中的柑橘果胶的浓度为20-40mg/mL。
可选地,步骤S3中,所述搅拌的条件包括:温度为25-40℃,时间为5-20min;
所述高速剪切的条件包括:速率为10000-14000rpm,时间为2-4min;
所述高压均质循环处理的条件包括:压力为500-750bar,循环次数为1-5次。
可选地,步骤S4中,所述注射器固定于注射泵上,所述注射器头部与软硅胶管相连,所述软硅胶管的直径为0.1-0.5cm,黄酮乳液出口与所述酸化乙醇或金属离子水溶液液面的垂直距离为0.5-5cm,所述黄酮乳液滴落速度为1-3mL/min。
可选地,步骤S4中,所述酸化乙醇水溶液中的酸为盐酸、醋酸或磷酸中的至少一种;
所述酸在所述酸化乙醇中的体积浓度为1-10%;
所述乙醇在所述酸化乙醇中的而体积浓度为90-99%;
所述金属离子为钙离子;
所述反应固化的时间为4-12h;
所述冲洗条件包括:冲洗时间为3-5min,冲洗次数为1-3次。
可选地,所述方法还包括将所述乳液凝胶珠在2-5℃条件下储藏或干燥处理。
本公开第二方面提供一种第一方面所述的制备方法得到的乳液凝胶珠。
本公开第三方面提供一种第二方面所述的乳液凝胶珠在胃肠道消化过程中的靶向特性。
可选地,所述靶向特性包括黄酮在小肠和结肠中的靶向释放。
通过上述技术方案,本公开的制备方法简单,安全无毒;本方法制备的载有黄酮的乳液凝胶珠,无需昂贵的生化试剂,所用乙醇经济适用,降低了成本,使用的柑橘果胶可较容易的从植物细胞组织中获得,提高了柑橘加工副产物的综合利用。
本公开在实现小肠和结肠两种不同靶向递送黄酮的同时,让黄酮通过一种分散乳液的形式被固化形成凝胶珠,改善其溶解性、稳定性,强化其营养功能。
本公开得到的乳液凝胶珠的黄酮包埋率较高,该乳液凝胶珠外观呈球形,硬度较强,在体外模拟胃肠道消化过程中具有良好的靶向特性。
本公开的其他特征和优点将在随后的具体实施方式部分予以详细说明。
附图说明
附图是用来提供对本公开的进一步理解,并且构成说明书的一部分,与下面的具体实施方式一起用于解释本公开,但并不构成对本公开的限制。在附图中:
图1为不同交联方法制备的乳液凝胶珠的结构示意图。
图2为乳液凝胶珠的照片及微观图。
图3为乳液凝胶珠中黄酮的包埋率。
图4为乳液凝胶珠在体外模拟胃肠道消化释放的黄酮变化量。
图5为乳液凝胶珠体外模拟胃肠道消化后外观及表面微观变化(左图为实施例1,右图为实施例2)。
具体实施方式
以下结合附图对本公开的具体实施方式进行详细说明。应当理解的是,此处所描述的具体实施方式仅用于说明和解释本公开,并不用于限制本公开。
本公开第一方面提供一种实现黄酮不同部位靶向释放的乳液凝胶珠的制备方法,所述方法包括如下步骤:
S1、黄酮分散液的制备:将黄酮溶解在植物油中,使用超声处理使其分散均匀,得到黄酮分散液;
S2、柑橘果胶水溶液的制备:将柑橘果胶粉末溶解在去离子水中,使用恒温磁力搅拌器连续搅拌使其分散均匀,后置于0-6℃下过夜水化,得到柑橘果胶水溶液;
S3、黄酮乳液的制备:将所述黄酮分散液和所述柑橘果胶水溶液按照质量比为0.1-5:1.9-5的比例进行混合得到混合液,将所述混合液搅拌后进行高速剪切得到黄酮粗乳液,将所述黄酮粗乳液经高压均质循环处理,得到体系均一的黄酮乳液;
S4、乳液凝胶珠的制备:采用注射器将所述黄酮乳液滴入含有酸化乙醇或金属离子水溶液中,然后反应固化,并用去离子水进行冲洗,得到乳液凝胶珠。
本公开中,所述植物油可以为玉米油;所述黄酮分散液和所述柑橘果胶水溶液按照质量比优选为1:4。
根据本公开,步骤S1中,所述超声处理条件包括:温度为25-40℃,时间为10-40min,频率为25-80kHz;
所述黄酮分散液中黄酮的质量百分比为0.1-0.5%;优选为0.2%。
根据本公开,步骤S2中,所述恒温磁力搅拌器处理的条件包括:温度为25-50℃,时间为4-12h;
所述柑橘果胶水溶液中的柑橘果胶的浓度为20-40mg/mL。
本公开中,所述柑橘果胶粉末由常规方法制得;所述柑橘果胶水溶液中的柑橘果胶的浓度优选为30mg/mL。
根据本公开,步骤S3中,所述搅拌的条件包括:温度为25-40℃,时间为5-20min;
所述高速剪切的条件包括:速率为10000-14000rpm,时间为2-4min;
所述高压均质循环处理的条件包括:压力为500-750bar,循环次数为1-5次。
根据本公开,步骤S4中,所述注射器固定于注射泵上,所述注射器头部与软硅胶管相连,所述软硅胶管的直径为0.1-0.5cm,黄酮乳液出口与所述酸化乙醇或金属离子水溶液液面的垂直距离为0.5-5cm,所述黄酮乳液滴落速度为1-3mL/min。
根据本公开,步骤S4中,所述酸化乙醇水溶液中的酸为盐酸、醋酸或磷酸中的至少一种;优选地,所述酸可以为盐酸;
所述酸在所述酸化乙醇中的体积浓度为1-10%;
所述乙醇在所述酸化乙醇中的而体积浓度为90-99%;
所述金属离子为钙离子;优选地,所述钙离子的摩尔浓度至少为100Mm;
所述反应固化的时间为4-12h;
所述冲洗条件包括:冲洗时间为3-5min,冲洗次数为1-3次。
在本公开中的一种实施方案中,制备的所述乳液凝胶珠为醇乳液凝胶珠时,所用的柑橘果胶水溶液pH为2.0-3.0。
在本公开中的一种实施方案中,制备的所述乳液凝胶珠为钙乳液凝胶珠时,所用的柑橘果胶水溶液pH为4.0-6.0。
其中,醇乳液凝胶珠和钙乳液凝胶珠分别为酸化醇交联和钙交联得到的乳液凝胶珠。
根据本公开,所述方法还包括将所述乳液凝胶珠在2-5℃条件下储藏或干燥处理。
本公开第二方面提供一种第一方面所述的制备方法得到的乳液凝胶珠。
本公开第三方面提供一种第二方面所述的乳液凝胶珠在胃肠道消化过程中的靶向特性。
根据本公开,所述靶向特性包括黄酮在小肠和结肠中的靶向释放。
下面通过实施例来进一步说明本公开,但是本公开并不因此而受到任何限制。
下述实施例中所使用的实验方法如无特殊说明,均为常规方法。
下述实施例中所用的材料、试剂等,如无特殊说明,均可从商业途径得到(如下表)。
名称 | 购买厂家 | 货号 |
黄酮 | 上海源叶生物科技有限公司 | S30645 |
玉米油 | 益海嘉里食品营销有限公司 | 一级 |
尿素 | Sigma-Aldrich公司 | U5128 |
黏蛋白 | 上海源叶生物科技有限公司 | S12066 |
胃蛋白酶 | Sigma-Aldrich公司 | V900497 |
胆盐 | Sigma-Aldrich公司 | 48305 |
脂肪酶 | Sigma-Aldrich公司 | L3126 |
果胶酶 | 诺维信生物技术有限公司 | Pectinex Ultra Color SON40011 |
实施例1
醇交联乳液凝胶珠的制备方法如下:
乳液的制备:配制含黄酮、玉米油的悬浮液,超声分散均匀,后与柑橘果胶水溶液混合,黄酮浓度为0.2wt%,玉米油浓度为20wt%,柑橘果胶浓度为30mg/mL。将混合溶液搅拌后依次进行高速剪切(11000rpm,3min)、高压均质(600bar,3次),获得体系均一的乳液。
乳液凝胶珠的制备:采用50ml注射器(相连软硅胶管孔径0.2cm)将乳液滴入酸化乙醇水溶液中,其中盐酸体积为1%(1ml浓盐酸+9ml水),乙醇体积为50%(45ml乙醇+45ml水)。乳液滴与水溶液液面的垂直距离为5cm;然后反应固化8h,并用去离子水冲洗三次,即得到醇乳液凝胶珠。
实施例2
按照实施例1的方法制备钙交联乳液凝胶珠,区别在于,将乳液滴入酸化乙醇水溶液调整为钙离子水溶液,离子摩尔浓度为100mM。
利用数码相机和扫描电镜对实施例1和实施例2形成的乳液凝胶珠进行观察,结果如图1所示,在醇和钙两种交联的条件下,均形成球状的乳液凝胶珠。
测试例1
本测试例用于说明乳液凝胶珠的理化性质的表征方法
理化性质表征:凝胶珠的形状和大小用光学显微镜记录,并通过Image J图像分析软件进行尺寸分析。采用直径为38mm的橡胶圆柱探针,以1.0mm/s的探针速度进行双压缩(形变为初始高度的50%)测试,使用Texture Exponent 6.1.4.0软件获得乳液凝胶珠的硬度。采用称重法测定乳液凝胶珠的水分含量。结果如表1所示。
测试例2
本测试例用于说明乳液凝胶珠黄酮包埋率的测定
取1g乳液凝胶珠分散在10ml磷酸盐缓冲液(50mM;pH 7.4)中,加入果胶酶浓度为1.6U/mg果胶,在磁力搅拌器上混合均匀,再加入10ml乙醇以确保黄酮溶解完全,最后用乙醇-水混合物(1:1)将上清液(含黄酮)稀释至标定范围(0.1-20μg.ml-1),在283nm处测定吸光度值。未包埋黄酮的乳液凝胶珠作为对照。结果如图3所示。
测试例3
本测试例用于说明乳液凝胶珠体外模拟胃肠道消化情况表征
口腔模拟消化:称取1g乳液凝胶珠与10mL口腔模拟液(0.117g/L氯化钠、0.4g/L尿素、0.149g/L氯化钾、2.1g/L碳酸氢钠、1g/L黏蛋白)充分混合,调节pH 6.8,于37℃水浴中搅拌90s,转速100r/min,90s后停止反应。
胃部模拟消化:经口腔消化后的样品以体积比1:1与胃模拟液(2g/L氯化钠、3.2g/L胃蛋白酶,用HCl溶液调节pH 2.0)混合,然后调节pH 2.0,于37℃水浴中搅拌1h,转速100r/min。
小肠模拟消化:消化液样品在经过模拟胃消化阶段1h后,调节pH 7.0,并依次加入4mL胆盐溶液(5g/L)、1mL氯化钙(83.25g/L)溶液,再调节其pH 7.0;最后加入2.5mL现配制的脂肪酶液(4.8g/L),于37℃水浴中搅拌2h,转速100r/min。
结肠模拟消化:消化液样品在经过模拟小肠消化阶段2h后,加入果胶酶(1.6U/mg果胶),调节其pH 7.0,于37℃水浴中搅拌12h,转速100r/min。
取上述各阶段消化液样品1mL,用于黄酮释放量的测定,测定方法同黄酮包埋率。结果如图4所示。各阶段消化后的凝胶珠外观图及凝胶珠表面微观图结果如图5所示。
表1乳液凝胶珠的理化性质
通过上述实验结果可知,实施例1和实施例2所得到的乳液凝胶珠的包埋率分别高达88%和95%。实施例1和实施例2所得到的乳液凝胶珠尺寸相近,外观呈球形,含水量及硬度相差不大。体外模拟胃肠道消化时,实施例1和实施例2所得到的乳液凝胶珠分别在小肠和结肠部位降解较完全,黄酮的释放量分别为78%和82%,体现了良好的小肠和结肠靶向释放特性。
以上结合附图详细描述了本公开的优选实施方式,但是,本公开并不限于上述实施方式中的具体细节,在本公开的技术构思范围内,可以对本公开的技术方案进行多种简单变型,这些简单变型均属于本公开的保护范围。
另外需要说明的是,在上述具体实施方式中所描述的各个具体技术特征,在不矛盾的情况下,可以通过任何合适的方式进行组合,为了避免不必要的重复,本公开对各种可能的组合方式不再另行说明。
此外,本公开的各种不同的实施方式之间也可以进行任意组合,只要其不违背本公开的思想,其同样应当视为本公开所公开的内容。
Claims (10)
1.一种实现黄酮不同部位靶向释放的乳液凝胶珠的制备方法,其特征在于,所述方法包括如下步骤:
S1、黄酮分散液的制备:将黄酮溶解在植物油中,使用超声处理使其分散均匀,得到黄酮分散液;
S2、柑橘果胶水溶液的制备:将柑橘果胶粉末溶解在去离子水中,使用恒温磁力搅拌器连续搅拌使其分散均匀,后置于0-6℃下过夜水化,得到柑橘果胶水溶液;
S3、黄酮乳液的制备:将所述黄酮分散液和所述柑橘果胶水溶液按照质量比为0.1-5:1.9-5的比例进行混合得到混合液,将所述混合液搅拌后进行高速剪切得到黄酮粗乳液,将所述黄酮粗乳液经高压均质循环处理,得到体系均一的黄酮乳液;
S4、乳液凝胶珠的制备:采用注射器将所述黄酮乳液滴入含有酸化乙醇或金属离子水溶液中,然后反应固化,并用去离子水进行冲洗,得到乳液凝胶珠。
2.根据权利要求1所述的方法,其中,步骤S1中,所述超声处理条件包括:温度为25-40℃,时间为10-40min,频率为25-80kHz;
所述黄酮分散液中黄酮的质量百分比为0.1-0.5%。
3.根据权利要求1所述的方法,其中,步骤S2中,所述恒温磁力搅拌器的处理条件包括:温度为25-50℃,时间为4-12h;
所述柑橘果胶水溶液中的柑橘果胶的浓度为20-40mg/mL。
4.根据权利要求1所述的方法,其中,步骤S3中,所述搅拌的条件包括:温度为25-40℃,时间为5-20min;
所述高速剪切的条件包括:速率为10000-14000rpm,时间为2-4min;
所述高压均质循环处理的条件包括:压力为500-750bar,循环次数为1-5次。
5.根据权利要求1所述的方法,其中,步骤S4中,所述注射器固定于注射泵上,所述注射器头部与软硅胶管相连,所述软硅胶管的直径为0.1-0.5cm,黄酮乳液出口与所述酸化乙醇或金属离子水溶液的液面的垂直距离为0.5-5cm,所述黄酮乳液滴落速度为1-3mL/min。
6.根据权利要求1所述的方法,其中,步骤S4中,所述酸化乙醇水溶液中的酸为盐酸、醋酸或磷酸中的至少一种;
所述酸在所述酸化乙醇中的体积浓度为1-10%;
所述乙醇在所述酸化乙醇中的而体积浓度为90-99%;
所述金属离子为钙离子;
所述反应固化的时间为4-12h;
所述冲洗条件包括:冲洗时间为3-5min,冲洗次数为1-3次。
7.根据权利要求1所述的方法,其中,所述方法还包括将所述乳液凝胶珠在2-5℃条件下储藏或干燥处理。
8.权利要求1-7任意一项所述的制备方法得到的乳液凝胶珠。
9.权利要求8所述的乳液凝胶珠在胃肠道消化过程中的靶向特性。
10.根据权利要求9所述靶向特性,其中,所述靶向特性包括黄酮在小肠和结肠中的靶向释放。
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