CN111514289A - 新冠病毒免疫纳米颗粒制剂的合成方法 - Google Patents
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Abstract
本发明公布一种新冠病毒免疫纳米颗粒制剂的合成方法。主要步骤包括:1)PLGA‑PEG‑NH2溶液的制备;2)混合法制备新冠S蛋白@CpG纳米颗粒。CpG可全身性激活机体免疫功能,形成肌体对新冠病毒的免疫反应,并形成免疫记忆。PLGA‑PEG‑NH2无毒,生物相容性好,具有优异的成囊性,可以很好地用于鼻腔给药,延长药物在体内的滞留,从而提高效果。新冠病毒免疫纳米颗粒可很好地预防新冠病毒的感染。
Description
技术领域
本发明涉及纳米颗粒制剂的合成技术领域,具体涉及一种通过PLGA-PEG-NH2包裹新冠病毒S蛋白、吲哚菁绿(CpG)和CpG的策略,合成病毒免疫纳米颗粒制剂的方法。
背景技术
目前,冠状病毒是世界上对人类威胁最大的流行性疾病之一。免疫治疗通过激活人体免疫系统,依靠自身免疫机能杀灭病毒,从而达到预防病毒感染的作用。鉴于CpG可以在体内可以激发全身免疫系统产生细胞因子风暴(如干扰素和各种白细胞介素等),并使在抗病毒过程中具有重要作用的树突状细胞(DC细胞,提呈病毒抗原),巨噬细胞(RAW细胞,吞噬病毒) 和自然杀伤细胞(NK细胞,杀伤病毒)等被大量激活,随后大幅提高T细胞的增值效率。这种免疫纳米颗粒通过激活患者自身免疫系统,利用病毒的特征S蛋白诱导机体的特异性细胞免疫和体液免疫反应,增强机体的抗病毒能力,阻止病毒的感染,以达到清除或控制病毒扩散的目的。
PLGA-PEG-NH2是一种二嵌段聚合物。其中PLGA由两种单体——乳酸和羟基乙酸随机聚合而成,是一种可降解的功能高分子有机化合物,其降解产物是乳酸和羟基乙酸,同时也是人代谢途径的副产物,所当它应用在医药和生物材料中时不会有毒副作用,具有良好的生物相容性、无毒、良好的成囊和成膜的性能。PEG具有良好的水溶性,生物相容性好,并赋予了聚合物温敏相变的性质。
发明内容
本发明为克服现有技术的不足,提供一种通过PLGA-PEG-NH2包裹新冠病毒S蛋白和CpG 的策略,合成病毒免疫纳米颗粒制剂的方法。利用CpG和病毒S蛋白诱导机体的特异性细胞免疫和体液免疫反应,增强机体的抗病毒能力,阻止病毒的感染,以达到清除或控制病毒扩散的目的。
本发明的技术方案是一种病毒免疫纳米颗粒制剂的合成方法,通过PLGA-PEG-NH2包裹新冠病毒S蛋白和CpG的策略,具体步骤如下:
1)称取PLGA-PEG-NH2材料,加入水中溶解,得到浓度为0.2-0.5mg/ml的PLGA-PEG-NH2溶液;
2)称取CpG材料,加入水中溶解,得到浓度为5-10mg/ml的CpG溶液;
3)各取适量混合成病毒免疫纳米颗粒。
2、根据权利要求1所述的仿生模拟合成病毒免疫纳米颗粒制剂的方法,其特征是,所述步骤3)具体如下:
(1)在室温下将盛有1ml的PLGA-PEG-NH2溶液的单口瓶置于旋转搅拌器上,搅拌速度设定为 500r/min;
(2)边搅拌边逐滴加入8uL的CpG水溶液和20uL病毒S蛋白溶液,继续搅拌直至完全混匀,最终得到新冠S蛋白@CpG病毒免疫纳米颗粒。
本发明的优势在于:
1)CpG可以激活细胞免疫,增强机体的抗病毒能力,阻止病毒的感染,以达到清除或控制病毒扩散的目的。
2)PLGA-PEG-NH2无毒,生物相容性好,可以很方便的形成纳米颗粒,可以很好地用于体内注射,延长药物在体内的滞留,从而提高效果。
附图说明
图1:新冠S蛋白@CpG病毒免疫纳米颗粒的TEM图像。
具体实施方式
以下结合附图和具体实施例来对本发明作进一步的说明。
实施例1:
1)准确称取0.25mg的PLGA-PEG-NH2材料,加入1mL水溶解,得到浓度为0.25mg/ml的 PLGA-PEG-NH2水溶液。
2)准确称取5mg的CpG材料,加入1mL水溶解,得到浓度为5mg/ml的CpG水溶液。
3)混合法合成新冠S蛋白@CpG病毒免疫纳米颗粒的方法如下:
(1)在室温下将盛有1ml的PLGA-PEG-NH2溶液的单口瓶置于旋转搅拌器上,搅拌速度设定为 500r/min;
(2)边搅拌边逐滴加入8uL的CpG水溶液和20uL病毒S蛋白溶液,继续搅拌直至完全混匀,最终得到新冠S蛋白@CpG病毒免疫纳米颗粒。
实施例2:
1)准确称取0.2mg的PLGA-PEG-NH2材料,加入1mL水溶解,得到浓度为0.2mg/ml的PLGA-PEG-NH2有机溶液。
2)准确称取8mg的CpG材料,加入1mL水溶解,得到浓度为8mg/ml的CpG水溶液。
3)混合法合成新冠S蛋白@CpG病毒免疫纳米颗粒的方法如下:
(1)在室温下将盛有1ml的PLGA-PEG-NH2溶液的单口瓶置于旋转搅拌器上,搅拌速度设定为500r/min;
(2)边搅拌边逐滴加入20uL病毒S蛋白溶液和20uLCpG溶液,继续搅拌直至完全混匀,最终得到新冠S蛋白@CpG病毒免疫纳米颗粒。
实施例3:
1)准确称取0.4mg的PLGA-PEG-NH2材料,加入1mL水溶解,得到浓度为0.4mg/ml的PLGA-PEG-NH2有机溶液。
2)准确称取6mg的CpG材料,加入1mL水溶解,得到浓度为6mg/ml的CpG水溶液。
3)混合法合成新冠S蛋白@CpG病毒免疫纳米颗粒的方法如下:
(1)在室温下将盛有1ml的PLGA-PEG-NH2溶液的单口瓶置于旋转搅拌器上,搅拌速度设定为 500r/min;
(2)边搅拌边逐滴加入10uL的CpG水溶液和20uL病毒S蛋白溶液,继续搅拌直至完全混匀,最终得到新冠S蛋白@CpG病毒免疫纳米颗粒。图1:新冠S蛋白@CpG病毒免疫纳米颗粒的TEM图像。
Claims (2)
1.新冠病毒免疫纳米颗粒制剂的合成方法,其特征是,通过PLGA-PEG-NH2包裹新冠病毒S蛋白和CpG的策略,具体步骤如下:
1)称取PLGA-PEG-NH2材料,加入水中溶解,得到浓度为0.2-0.5mg/ml的PLGA-PEG-NH2溶液;
2)称取CpG材料,加入水中溶解,得到浓度为5-10mg/ml的CpG溶液;
3)取20uL病毒S蛋白溶液和20uLCpG溶液加入1mlPLGA-PEG-NH2水溶液中混合成病毒免疫纳米颗粒。
2.根据权利要求1所述的新冠病毒免疫纳米颗粒制剂的合成方法,其特征是,所述步骤3)具体如下:
(1)在室温下将盛有1ml的PLGA-PEG-NH2溶液的单口瓶置于旋转搅拌器上,搅拌速度设定为500r/min;
(2)边搅拌边逐滴加入20uL新冠病毒S蛋白溶液和20uLCpG溶液,继续搅拌直至完全混匀,最终得到新冠S蛋白@CpG病毒免疫纳米颗粒。
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| CN113633764A (zh) * | 2021-09-02 | 2021-11-12 | 中国食品药品检定研究院 | 一种含佐剂的新冠dna疫苗 |
| CN113633764B (zh) * | 2021-09-02 | 2024-05-14 | 中国食品药品检定研究院 | 一种含佐剂的新冠dna疫苗 |
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