CN105476952A - 一种白蛋白结合型紫杉醇缓释制剂及其制备方法 - Google Patents
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Abstract
本发明公开了一种白蛋白结合型紫杉醇缓释制剂及其制备方法。该制剂组分包含:无菌紫杉醇、人血清白蛋白、药用级壳聚糖。本发明提供的一种白蛋白结合型紫杉醇缓释制剂,可提高紫杉醇释放的稳定性和安全性,延长药效,提高靶向能力,减少药物副反应。选择壳聚糖凝胶类为载体和合适的配比能够保护药物免受环境影响,隔离活性成分,降低挥发性和毒性,可获得适宜的释药速度,起到作用和缓而持久、不良反应较少的效果,并且可以提高药物有效率。
Description
技术领域
本发明涉及医药领域,具体涉及一种白蛋白结合型紫杉醇缓释制剂及其制备方法。
背景技术
紫杉醇是从红豆杉属植物中分离纯化得到的天然抗肿瘤药物。是新型抗微管药物,通过促进微管蛋白聚合,抑制解聚,保持微管蛋白稳定,抑制细胞有丝分裂。体外实验证明紫杉醇具有显著的放射增敏作用,可能是使细胞中止于对放疗敏感的G2和M期。药理和临床研究发现,紫杉醇具有广谱的抗癌活性,对卵巢癌和乳腺癌有独特的疗效,是继顺铂和阿霉素后最有希望的化疗药物,被国内外专家誉为90年代抗肿瘤药最重大成就之一。紫杉醇注射液是治疗卵巢癌、乳腺癌、肺癌、鼻咽癌等实体肿瘤的一线用药。对于头颈癌、食管癌,精原细胞瘤,复发非何金氏淋巴瘤等有一定疗效。是治疗难治性卵巢癌的最有效药物之一,在治疗乳腺癌疾病中占有重要地位;是高效、低毒和广谱的抗癌药,也是目前市场需求量最大和市场销售额增长最快的抗癌药,约占化疗药的30%以上。
白蛋白结合型紫杉醇(Abraxane)是美国FDA批准用于转移性乳腺癌治疗的注射用紫杉醇,是全球首个获批的无溶剂型紫杉类化疗药物,通过利用肿瘤摄取营养的生物机制和纳米微粒白蛋白结合技术平台,使药物高浓度地聚集在肿瘤组织内并发挥高效抗肿瘤作用。该剂型的药物有效率有所提高,但是由于白蛋白在药物传输过程中降解速率较大,对到达病灶的有效药物量有一定影响。
发明内容
本发明提供了一种白蛋白结合型紫杉醇缓释制剂及其制备方法。主要利用壳聚糖的成膜性能及其良好的生理活性,在白蛋白结合型紫杉醇外部包裹壳聚糖膜,既不会引起生物学反应,还可以提高紫杉醇的稳定性和安全性,提高药物利用率,延长药效,提高靶向能力,起列作用和缓而持久、不良反应较少的治疗效果。
具体实施方式
下面结合具体实施例对本发明作进一步说明,以助于理解本发明的内容。
实施例1
将纳米级无菌紫杉醇1g加入20ml温度为20℃的无水乙醇中溶解,加入橄榄油10g,搅拌均匀,加入大豆磷脂1g,注射用生理盐水40ml搅拌均匀,加入人血清白蛋白10g搅拌均匀,用0.22μm微孔滤膜过滤,得到微乳溶液;将所得微乳溶液冷冻干燥,即得一种白蛋白结合型紫杉醇冻干制剂;
无菌壳聚糖20g加入温度为20℃的注射用水中50ml,保温搅拌过夜得透明液体,加入白蛋白结合型紫杉醇冻干制剂,高速搅拌形成包裹均匀的乳液,用0.22μm微孔滤膜过滤,得到微乳溶液;将所得微乳溶液冷冻干燥,并加入注射用水150ml溶解得到缓释型制剂。
实施例2
将纳米级无菌紫杉醇0.5g加入20ml温度为30℃的无水乙醇中溶解,加入橄榄油7g,搅拌均匀,加入大豆磷脂2g,注射用生理盐水30ml搅拌均匀,加入人血清白蛋白10g搅拌均匀,用0.22μm微孔滤膜过滤,得到微乳溶液;将所得微乳溶液冷冻干燥,即得一种白蛋白结合型紫杉醇冻干制剂;
无菌壳聚糖15g加入温度为35℃的注射用水中40ml,保温搅拌过夜得透明液体,加入白蛋白结合型紫杉醇冻干制剂,高速搅拌形成包裹均匀的乳液,用0.22μm微孔滤膜过滤,得到微乳溶液;将所得微乳溶液冷冻干燥,并加入注射用水100ml溶解得到缓释型制剂。
实施例3
将纳米级无菌紫杉醇0.5g加入15ml温度为35℃的无水乙醇中溶解,加入橄榄油6g,搅拌均匀,加入大豆磷脂1g,注射用生理盐水40ml搅拌均匀,加入人血清白蛋白8g搅拌均匀,用0.22μm微孔滤膜过滤,得到微乳溶液;将所得微乳溶液冷冻干燥,即得一种白蛋白结合型紫杉醇冻干制剂;
无菌壳聚糖10g加入温度为35℃的注射用水中40ml,保温搅拌过夜得透明液体,加入白蛋白结合型紫杉醇冻干制剂,高速搅拌形成包裹均匀的乳液,用0.22μm微孔滤膜过滤,得到微乳溶液;将所得微乳溶液冷冻干燥,并加入注射用水100ml溶解得到缓释型制剂。
实施例4:
将纳米级无菌紫杉醇2g加入30ml温度为20℃的无水乙醇中溶解,加入橄榄油10g,搅拌均匀,加入大豆磷脂2g,注射用生理盐水200ml搅拌均匀,加入人血清白蛋白60g搅拌均匀,用0.22μm微孔滤膜过滤,得到微乳溶液;将所得微乳溶液冷冻干燥,即得一种白蛋白结合型紫杉醇冻干制剂;
无菌壳聚糖10g加入温度为35℃的注射用水中40ml,保温搅拌过夜得透明液体,加入白蛋白结合型紫杉醇冻干制剂,高速搅拌形成包裹均匀的乳液,用0.22μm微孔滤膜过滤,得到微乳溶液;将所得微乳溶液冷冻干燥,并加入注射用水250ml溶解得到缓释型制剂。
实施例5:
将纳米级无菌紫杉醇1g加入20ml温度为38℃的无水乙醇中溶解,加入橄榄油20g,搅拌均匀,加入大豆磷脂5g,注射用生理盐水200ml搅拌均匀,加入人血清白蛋白20g搅拌均匀,用0.22μm微孔滤膜过滤,得到微乳溶液;将所得微乳溶液冷冻干燥,即得一种白蛋白结合型紫杉醇冻干制剂;
无菌壳聚糖50g加入温度为40℃的注射用水中200ml,保温搅拌过夜得透明液体,加入白蛋白结合型紫杉醇冻干制剂,高速搅拌形成包裹均匀的乳液,用0.22μm微孔滤膜过滤,得到微乳溶液;将所得微乳溶液冷冻干燥,并加入注射用水400ml溶解得到缓释型制剂。
Claims (7)
1.一种白蛋白结合型紫杉醇缓释制剂,包括无菌紫杉醇(纳米级)、人血清白蛋白(纳米级)、表面活性剂、油相等,其特征在于制剂中加入无菌壳聚糖。
2.根据权利要求1所述白蛋白结合型紫杉醇缓释制剂,其含量比例为无菌紫杉醇用量1份、人血清白蛋白用量5-30份、无菌壳聚糖用量5-50份、油相10-20份、表面活性剂1-5份。
3.根据权利要求1所述白蛋白结合型紫杉醇缓释制剂,壳聚糖脱乙酰度为40-60%,相对分子质量低于1×104。
4.根据权利要求1所述白蛋白结合型紫杉醇缓释制剂,所述表面活性剂为磷脂、壳聚糖聚乙二醇等,其中磷脂为大豆磷脂、蛋黄磷脂或合成磷脂,所述磷脂纯度为90%以上。
5.根据权利要求1所述白蛋白结合型紫杉醇缓释制剂,油相选自橄榄油、薏苡仁油、三丁酸甘油酯、三辛酸甘油酯的一种或几种。
6.一种白蛋白结合型紫杉醇缓释制剂的制备方法,包括如下步骤:
(1)一定温度下将纳米级无菌紫杉醇加入无水乙醇中溶解,加入油相,搅拌均匀,陆续加入表面活性剂和注射用生理盐水搅拌均匀,加入人血清白蛋白搅拌均匀,用0.22μm微孔滤膜过滤,得到微乳溶液;将所得微乳溶液冷冻干燥,即得一种白蛋白结合型紫杉醇冻干制剂;
(2)一定温度下无菌壳聚糖加入加入注射用水中,搅拌过夜得透明液体,加入白蛋白结合型紫杉醇冻干制剂,高速搅拌形成包裹均匀的乳液。用0.22μm微孔滤膜过滤,得到微乳溶液;将所得微乳溶液冷冻干燥,并加入注射用水溶解得到缓释型制剂。
7.根据权利要求6所述一种白蛋白结合型紫杉醇缓释制剂的制备方法,制剂的制备温度为20-40℃。
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