CN114652698B - 一种用于乳腺癌治疗的siSphk1-DOX共递送靶向纳米制剂及其制备方法和应用 - Google Patents

一种用于乳腺癌治疗的siSphk1-DOX共递送靶向纳米制剂及其制备方法和应用 Download PDF

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CN114652698B
CN114652698B CN202210157942.5A CN202210157942A CN114652698B CN 114652698 B CN114652698 B CN 114652698B CN 202210157942 A CN202210157942 A CN 202210157942A CN 114652698 B CN114652698 B CN 114652698B
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梁金英
王全喜
尚校军
黄梦影
侯雪艳
马素英
王霄
阎玺庆
马伟伟
史永利
尹延彦
杨雪
赵营
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Abstract

本发明公开了一种用于乳腺癌治疗的siSphk1‑DOX共递送靶向纳米制剂及其制备方法和应用,所述共递送靶向纳米制剂由酸敏感脂质外层和DOX‑DE‑siSphk1纳米核组成,其中酸敏感脂质外层为DOPE、PC‑98T和胆固醇的混合物,DOX‑DE‑siSphk1纳米核中先将DOX荷载于DE胶束疏水内核形成DOX‑DE胶束,再将siRNA借助电荷物理结合于DOX‑DE胶束表面形成DOX‑DE‑siSphk1纳米粒。本发明还具体公开了该siSphk1‑DOX共递送靶向纳米制剂的制备方法及其在乳腺癌治疗中的应用。本发明的靶向纳米递送系统可通过静脉注射给药,借助酸敏感脂质外层和胶束内核实现siSphk1和DOX在乳腺癌细胞的靶向递送作用。

Description

一种用于乳腺癌治疗的siSphk1-DOX共递送靶向纳米制剂及其制备方法和应用
技术领域
本发明属于靶向纳米药物递送系统技术领域,具体涉及一种用于乳腺癌治疗的siSphk1-DOX共递送靶向纳米制剂及其制备方法和应用。
背景技术
乳腺癌是一种高度异质性的疾病,其病变过程涉及多种分子作用机制。目前,阿霉素(DOX)仍是临床上广泛使用的蒽醌类抗乳腺癌药物,可用晚期乳腺癌的治疗。但是DOX的治疗窗窄、心脏毒性大、耐药性强,这些问题严重制约其临床应用。很多情况下,化疗对乳腺癌患者的初期治疗有效,但在长期治疗过程中,会导致治疗失败甚至恶化复发。近年来,核酸(siRNA)和化疗药物的同时递送在乳腺癌治疗中引起极大的兴趣,有望提高阿霉素的治疗效果,并降低其心脏毒性和多药耐药性,实现乳腺癌的有效治疗。
研究显示,鞘氨醇激酶1(Sphingosine kinases 1,Sphk1)在乳腺癌中异常高表达,并参与肿瘤的生长和转移。RNA干扰技术将双链小RNA(siRNA)导入细胞,使靶基因发生转录后沉默,进而降低相关蛋白的生成,有望成为肿瘤治疗的新策略。然而,由于siRNA自身的分子量和分子结构的局限,在临床应用中面临众多挑战。本发明采用实验室合成的二油酰磷脂乙醇胺(Dioleoyl ethanolamine,DE)制备胶束疏水内核,胶束疏水内核包裹DOX,并借助物理吸附siRNA,外层包裹酸敏感脂质层,构建DOX和siSphk1共荷载纳米制剂,将DOX和siSphk1靶向递送至肿瘤组织,避免对正常组织的伤害。同时发挥DOX和siSphk1的抗肿瘤治疗作用,将有望提高DOX的抗癌治疗效果,并降低其心脏毒性和多药耐药现象,目前尚没有该方面的相关文献报道。
发明内容
为了降低DOX的心脏毒性和多药耐药性,本发明提供了一种用于乳腺癌治疗的siSphk1-DOX共递送靶向纳米制剂及其制备方法和应用,该方法制备的siSphk1-DOX共递送靶向纳米制剂应用于乳腺癌治疗,可实现siSphk1和DOX的乳腺癌靶向递送和治疗。
本发明为解决上述技术问题采用如下技术方案,一种用于乳腺癌治疗的siSphk1-DOX共递送靶向纳米制剂,其特征在于:所述共递送靶向纳米制剂由酸敏感脂质外层和DOX-DE-siSphk1纳米核组成,其重量百分比为酸敏感脂质外层60%-80%,DOX-DE-siSphk1纳米核20%-40%,其中酸敏感脂质外层为DOPE、PC-98T和胆固醇的混合物,其重量百分比为DOPE30%-45%、PC-98T 20%-45%和胆固醇10%-50%,DOX-DE-siSphk1纳米核中先将DOX荷载于DE胶束疏水内核形成DOX-DE胶束,其重量百分比为DOX 25%-45%和DE 55%-75%,再将siRNA借助电荷物理结合于DOX-DE胶束表面形成DOX-DE-siSphk1纳米粒,其重量百分比为siSphk11%-4%和DOX-DE 96%-99%,Sphk1 F:5’-CTGTCACCCATGAACCTGCT-3’,Sphk1 R:5’-TACAGGGAGGTAGGCCAGTC-3’,该共递送靶向纳米制剂静脉给药后靶向递送至乳腺癌细胞,用于乳腺癌靶向治疗。
本发明所述的用于乳腺癌治疗的siSphk1-DOX共递送靶向纳米制剂的制备方法,其特征在于具体步骤为:将DE和DOX溶解于无水乙醇,透析24h,取出透析袋内溶液稀释,挤膜,得DOX-DE胶束,随后加入siSphk1孵育24h,借助物理结合作用形成DOX-DE-siSphk1纳米粒;将脂质膜材用氯仿溶解,旋转蒸发除去有机溶剂,形成均匀脂质膜,加DOX-DE-siSphk1纳米粒分散液至脂质膜中,于40℃旋转震荡30min,用200nm聚碳酸酯膜挤压过膜3次,即得用于乳腺癌治疗的siSphk1-DOX共递送靶向纳米制剂。
本发明所述的用于乳腺癌治疗的siSphk1-DOX共递送靶向纳米制剂在制备治疗乳腺癌药物中的应用。
本发明与现有技术相比具有以下优点和有益效果:本发明制备了一种由PC-98T、DOPE和胆固醇组成的酸敏感脂质外层包裹DOX-DE-siSphk1纳米粒的靶向纳米递送系统,该靶向纳米递送系统可通过静脉注射给药,借助酸敏感脂质外层和胶束内核实现siSphk1和DOX在乳腺癌细胞的靶向递送作用。肿瘤微酸环境下释放的DE-siSphk1纳米粒可渗透进乳腺癌细胞内部,增加DOX和siSphk1在乳腺癌细胞的摄取,并提高DOX的乳腺癌治疗效果,同时降低其心脏毒性和多药耐药性。
附图说明
图1为siRNA和DOX共递送纳米粒透射电镜图,由图可见DOX-DE-siSphk1和DOX-DE-siSphk1/ASLNP的粒径分布为182.5±1nm和205.2±2nm,粒径分布均匀。
图2为siRNA和DOX共递送纳米粒的耐药乳腺癌细胞MCF-7/ADR摄取图,DOX-DE-siSphk1/ASLNP在MCF-7/ADR乳腺癌细胞中的摄取高于游离药物组和DOX-DE-siSphk1。
图3为DOX-DE-siSphk1/ASLNP尾静脉注射至腋下异位MCF-7/ADR乳腺癌细胞移植瘤动物模型体内,1h和6h后活体成像仪检测,以及尾静脉注射28天后,荷MCF-7/ADR乳腺癌小鼠体内肿瘤块,由图可知,DOX-DE-siSphk1/ASLNP纳米粒在肿瘤组织内的分布量远大于游离药物组和DOX-DE-siSphk1,而在肝和心脏的分布量少于游离药物组和DOX-DE-siSphk1。DOX-DE-siSphk1/ASLNP纳米粒的抗肿瘤疗效优于游离药物组和DOX-DE-siSphk1。
具体实施方式
以下通过实施例对本发明的上述内容做进一步详细说明,但不应该将此理解为本发明上述主题的范围仅限于以下的实施例,凡基于本发明上述内容实现的技术均属于本发明的范围。
实施例1:DOX-DE-siSphk1/ASLNP纳米粒的制备和表征
称取DOX 3mg和DE 7mg溶解于20mL无水乙醇,透析24h,取出透析袋内溶液稀释,用200nm聚碳酸酯膜挤压过膜3次,得DOX-DE胶束。随后加入siSphk1 110μg孵育24h,借物理结合作用形成DOX-DE-siSphk1纳米粒。
DOX和siRNA的酸敏感递送系统膜材处方组成为DOPE 8mg、PC-98T 8mg和胆固醇4mg,加入圆底烧瓶中,氯仿适量溶解,于40℃旋转蒸发除去有机溶剂,形成均匀脂质膜。取6mL DOX-DE-siSphk1纳米粒分散液至脂质膜中,于40℃旋转震荡30min,用200nm聚碳酸酯膜挤压过膜3次,即得DOX-DE-siSphk1/ASLNP纳米粒。用动态光散射法测定粒径,结果显示,平均粒径为205.2nm左右,粒径均一。
实施例2:DOX-DE-siSphk1/ASLNP纳米粒的制备和表征
称取DOX 2.5mg和DE 7.7mg溶解于20mL无水乙醇,透析24h,取出透析袋内溶液稀释,用200nm聚碳酸酯膜挤压过膜3次,得DOX-DE胶束。随后加入siSphk1 130μg孵育24h,借物理结合作用形成DOX-DE-siSphk1纳米粒。
DOX和siRNA的酸敏感递送系统膜材处方组成为DOPE 12mg、PC-98T 12mg和胆固醇6mg,加入圆底烧瓶中,氯仿适量溶解,于40℃旋转蒸发除去有机溶剂,形成均匀脂质膜。取6mL DOX-DE-siSphk1纳米粒分散液至脂质膜中,于40℃旋转震荡30min,用200nm聚碳酸酯膜挤压过膜3次,即得DOX-DE-siSphk1/ASLNP纳米粒。用动态光散射法测定粒径,结果显示,平均粒径为205.2nm左右,粒径均一。
实施例3:DOX-DE-siSphk1/ASLNP纳米粒的制备和表征
称取DOX 6mg和DE 10mg溶解于20mL无水乙醇,透析24h,取出透析袋内溶液稀释,用200nm聚碳酸酯膜挤压过膜3次,得DOX-DE胶束。随后加入siSphk1 250μg孵育24h,借物理结合作用形成DOX-DE-siSphk1纳米粒。
DOX和siRNA的酸敏感递送系统膜材处方组成为DOPE 10mg、PC-98T 12mg和胆固醇5mg,加入圆底烧瓶中,氯仿适量溶解,于40℃旋转蒸发除去有机溶剂,形成均匀脂质膜。取6mL DOX-DE-siSphk1纳米粒分散液至脂质膜中,于40℃旋转震荡30min,用200nm聚碳酸酯膜挤压过膜3次,即得DOX-DE-siSphk1/ASLNP纳米粒。用动态光散射法测定粒径,结果显示,平均粒径为205.2nm左右,粒径均一。
表1 不同pH值的磷酸盐溶液中,DOX-DE-siSphk1/ASLNP中DOX释放度
pH值 释放度
7.4 15%±1.3
6.5 75%±1.0
5.7 92%±1.5
以上显示和描述了本发明的基本原理,主要特征和优点,在不脱离本发明精神和范围的前提下,本发明还有各种变化和改进,这些变化和改进都落入要求保护的本发明的范围。
序列表
<110> 新乡医学院
<120> 一种用于乳腺癌治疗的siSphk1-DOX共递送靶向纳米制剂及其制备方法和应用
<130> 2022
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<213> 人工序列(artificial sequence)
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<212> DNA
<213> 人工序列(artificial sequence)
<400> 2
tacagggagg taggccagtc 20
序列表
<110> 新乡医学院
<120> 一种用于乳腺癌治疗的siSphk1-DOX共递送靶向纳米制剂及其制备方法和应用
<130> 2022
<160> 2
<170> SIPOSequenceListing 1.0
<210> 1
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<212> DNA
<213> 人工序列(artificial sequence)
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<210> 2
<211> 20
<212> DNA
<213> 人工序列(artificial sequence)
<400> 2
tacagggagg taggccagtc 20

Claims (3)

1.一种用于乳腺癌治疗的siSphk1-DOX共递送靶向纳米制剂,其特征在于:所述共递送靶向纳米制剂由酸敏感脂质外层和DOX-DE-siSphk1纳米核组成,其重量百分比为酸敏感脂质外层60%-80%,DOX-DE-siSphk1纳米核20%-40%,其中酸敏感脂质外层为DOPE、PC-98T和胆固醇的混合物,其重量百分比为DOPE 30%-45%、PC-98T 20%-45%和胆固醇10%-50%,DOX-DE-siSphk1纳米核中先将DOX荷载于DE胶束疏水内核形成DOX-DE胶束,其重量百分比为DOX25%-45%和DE 55%-75%,再将siRNA借助电荷物理结合于DOX-DE胶束表面形成DOX-DE-siSphk1纳米粒,其重量百分比为siSphk1 1%-4%和DOX-DE 96%-99%,Sphk1 F:5’-CTGTCACCCATGAACCTGCT-3’,Sphk1 R:5’-TACAGGGAGGTAGGCCAGTC-3’,该共递送靶向纳米制剂静脉给药后靶向递送至乳腺癌细胞,用于乳腺癌靶向治疗,所述DE为二油酰磷脂乙醇胺。
2.一种权利要求1所述的用于乳腺癌治疗的siSphk1-DOX共递送靶向纳米制剂的制备方法,其特征在于具体步骤为:将DE和DOX溶解于无水乙醇,透析24h,取出透析袋内溶液稀释,挤膜,得DOX-DE胶束,随后加入siSphk1孵育24h,借助物理结合作用形成DOX-DE-siSphk1纳米粒;将脂质膜材用氯仿溶解,旋转蒸发除去有机溶剂,形成均匀脂质膜,加DOX-DE-siSphk1纳米粒分散液至脂质膜中,于40℃旋转震荡30min,用200nm聚碳酸酯膜挤压过膜3次,即得用于乳腺癌治疗的siSphk1-DOX共递送靶向纳米制剂。
3.权利要求1所述的用于乳腺癌治疗的siSphk1-DOX共递送靶向纳米制剂在制备治疗乳腺癌药物中的应用。
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