CN113827705A - 一种动物胎盘脂多糖、动物血干扰素复合免疫增强剂 - Google Patents
一种动物胎盘脂多糖、动物血干扰素复合免疫增强剂 Download PDFInfo
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Abstract
本发明提供一种动物胎盘脂多糖、动物血干扰素复合免疫增强剂,以动物胎盘脂多糖、动物血干扰素为主要原料,加有无菌生理盐水以及辅料组成,其具体配方为每100 mL中含有胎盘脂多糖5‑30 mg;干扰素10500‑10800IU;聚乙二醇酯15‑20g;余量由无菌生理盐水补足,pH为6.0‑8.0。本发明复合免疫增强剂将动物胎盘脂多糖和动物血干扰素完美的结合,使脂多糖和干扰素发挥协同作用,与市面上现有类似产品相比,生物利用度较高、免疫增效作用强、无毒副作用、能够促进动物生长,改善动物的健康状态,可减少服用次数,缩短疗程。有助于实现减抗替抗的目的,间接提高人类食品安全。
Description
技术领域
本发明涉及生物技术领域,具体涉及一种动物胎盘脂多糖、动物血干扰素复合免疫增强剂及其制备方法。
背景技术
动物胎盘脂多糖是一种类酸性黏多糖与脂质的共价结合物。大量实验研究证明,它能明显诱导机体淋巴细胞的增殖,促进淋巴细胞的DNA合成;能够增强机体对多种细菌和病毒的非特异免疫力,同时对机体的体液免疫应答也具有良好的促进作用,可产生较好的免疫保护性。脂多糖能增强非特异性免疫防卫系统的体液因素使补体的含量增高,也可诱导干扰素的产生,使溶菌酶和吞噬细胞活性增强,提高嗜中性白细胞和巨噬细胞的杀菌作用。临床研究表明脂多糖对于病毒和细菌引起的许多过敏性疾患、感染性疾病有很好的预防和治疗作用,如对慢性支气管炎、支气管哮喘、慢性胃肠炎、过敏性皮疹和预防感冒等都有较好疗效。近些年已有厂家生产人胎盘脂多糖注射液,但针剂注射使用不便且长时间肌肉注射会给患者带来肌肉疼痛等问题,使其应用受到很大限制。
干扰素是一组具有多种功能的活性蛋白质(主要是糖蛋白),是一种由病毒和其他种类的干扰素诱导剂,刺激网状内皮系统(人体免疫系统的一种)、巨噬细胞、淋巴细胞以及体细胞所产生的一种糖蛋白。干扰素可根据蛋白质的氨基酸结构、抗原性和细胞来源,将其分为:IFN-α、IFN-β、IFN-γ三类。IFN-ω属于IFN-α家族,其结构和大小与其它IFN-α稍有差异,但抗原性有较大的不同。它具有高度的种属特异性,故动物的干扰素对人无效,干扰素具有具有多种生物活性,包括抗增殖、免疫调节、抗病毒、抗肿瘤和诱导分化作用。干扰素作为免疫增强剂可与疫苗联合使用,不仅能提高特异性中和抗体水平,提前疫苗保护期窗口,并且能显著提高细胞免疫应答水平。但干扰素结构不稳定,在很多缓冲体系或有其他离子存在的情况下容易失活;干扰素相对分子量小,在体内易受肾的代谢作用,体内半衰期短。
研制高抗病毒活性和高免疫调节活性的长效、稳定的溶液剂,是动物制剂专家不断研发的重要课题。本发明通过系统研究,提供了一种稳定的缓冲体系,研制出了长效聚合干扰素的溶液剂,此剂型在临床使用中既可以注射、也可以饮水,适用的pH值范围广,具有重要的应用价值。
发明内容
本发明解决的技术问题:提供一种动物胎盘脂多糖、动物血干扰素复合免疫增强剂,该免疫增强剂生物利用度较高、免疫增效作用强、无毒副作用、能够促进动物生长,改善动物的健康状态,实现减抗替抗的目的,间接提高人类食品安全。
本发明采用的技术方案:一种动物胎盘脂多糖、动物血干扰素复合免疫增强剂,由下述重量份的原料组成:以动物胎盘(猪、牛、羊等)脂多糖、动物血(猪、牛、羊、鸡、鸭、鹅等)干扰素为主要原料,加有无菌生理盐水以及辅料组成,其具体配方为每100 mL中含有胎盘脂多糖5-30 mg;干扰素10500-10800IU;聚乙二醇酯15-20g;余量由无菌生理盐水补足,pH为6.0-8.0。
其中的动物胎盘脂多糖是通过以下提取工艺步骤得到的:
(1)以新鲜动物胎盘为原料,去除胎膜和脐带,用纯水冲洗干净,依次用绞肉机、胶体磨、研磨机粉碎后,放-20℃以下冷库速冻24-48 h,然后取出37℃水浴融化,如此冻融3-5次后置于反应釜中进行消化酶解;
(2)向反应釜中加2-3倍原料重的生理盐水,加入原料重量20-40%的新鲜胰浆,用饱和氢氧化钙调pH值至7.5-8.5,间隙搅拌下,加热至50-55℃,消化10-12 h后,加热至60℃,用超声波发生器中波处理20-30 min,冷却至室温。用过滤式离心机离心过滤,滤液为酶解液;
(3)将酶解液用醋酸调pH值至4.0-6.0,放冷藏室静置过夜,然后高速(8000 r/min以上)4-8℃条件下离心20-30 min,分别收集上清液和沉淀,上清液即为脂多糖多肽粗提液;
(4)将脂多糖多肽粗提液用截留分子量10万的超滤装置进行超滤,透过液再经截留分子量1万超滤装置进行超滤,收集浓缩液即为脂多糖提取液。
其中的动物血干扰素是通过以下提取工艺步骤得到的:
(1)无菌采集健康动物鲜血,于10℃的条件下离心20min,吸取中间层白细胞,用质量分数为0.85%NH4Cl洗涤两次后离心,收集沉淀白细胞,除去NH4Cl,按照白细胞:培养液体积比1:10加入含5%动物血清的Eagle`sMEM混合培养液悬浮,将动物白细胞数稀释在10×107 个/ml~25×107个/ml之间,制得动物白细胞悬浮液;
(2)取一份动物白细胞悬浮液,加入含100个活性单位的动物白细胞干扰素,置于37℃ 水浴摇床搅拌培养48h;
(3)按照每毫升动物白细胞悬液50HANDVⅡ的加入量,在细胞悬液中加入一定量新城疫病毒NDVⅡ,调节pH为7.5,在水浴恒温振荡器37℃旋转培养24h,培养完成后,用6MHCl把培养液的pH调至3.5,在4℃下酸化处理4d,再用质量体积浓度6%的NaOH溶液把pH调至7.2,离心去除沉淀,取上清液,制得动物白细胞干扰素粗制液;
本发明动物胎盘脂多糖、动物血干扰素复合免疫增强剂的制备方法如下:
(1)取一份动物白细胞干扰素粗制液,用NaOH溶液调节pH值到8.5,在冰浴条件下,按照干扰素粗制液:聚乙二醇酯摩尔比1:5向溶液中加入聚乙二醇酯,聚乙二醇酯加入量为五份,升温至4℃,搅拌反应2h,向溶液中加入五份聚乙二醇酯,升温至12℃,搅拌反应2h,向溶液中加入五份聚乙二醇酯,升温至25℃,搅拌反应2h,向溶液加入五份聚乙二醇酯,升温至 36℃,搅拌反应2h,完全反应后,加入0.75Μ的半胱甘氨酸终止反应,得到聚乙二醇酯修饰的干扰素;
(2)先将聚乙二醇修饰的干扰素和脂多糖按配方称重后混合,加入总体积50-80%的生理盐水,搅拌均匀,后经过0.22μm除菌膜除菌;
(3)在净化百级条件下无菌操作将灭菌后混合液用饱和氢氧化钙调pH值至6.0-8.0,搅拌均匀,最后用灭菌生理盐水加至总体积即为复合无菌液;
(4)将复合无菌液按规格要求直接灌封,冷冻保存。
本发明的有益效果:
1、本发明复合免疫增强剂将动物胎盘脂多糖和动物干扰素完美的结合,使胎盘脂多糖和干扰素发挥协同作用,与市面上现有类似产品相比,生物利用度较高、免疫增效作用强、无毒副作用、能够促进动物生长,改善动物的健康状态,可减少服用次数,缩短疗程。目前尚未见有此类配方报道。
2、发明产品配方组合科学适用,各组份均为纯生物原料,对人体无毒副作用,各个成分之间具有相互协同作用,适口性好,大大提高产品的食用舒适性,可实现减抗替抗的目的,间接提高人类食品安全。
3、本发明产品生产采用传统工艺与现代工艺相结合,简易设备与现代设备相结合,可操作性强,规模可大可小,生产成本低,经济效益显著。
4、本发明将动物胎盘和血液废物利用,符合资源循环利用的基本原则,同时对环境保护非常有益。
具体实施方式
以下通过具体实施例再对本发明的上述内容作进一步的详细说明。但不应将此理解为本发明上述主题的范围仅局限于以下的实施例。在不脱离本发明上述技术思想的情况下,根据本领域普通技术知识和惯用手段做出的各种替换或变更,均应包括在本发明的范围内。
实施例1
一种动物胎盘脂多糖、动物血干扰素复合免疫增强剂,由下述重量份的原料组成:以猪胎盘脂多糖、鸡血干扰素为主要原料,加有无菌生理盐水以及辅料组成,其具体配方为每100 mL中含有胎盘脂多糖5mg;干扰素10500IU;聚乙二醇酯15g;余量由无菌生理盐水补足,pH为6.0。
其中的动物胎盘脂多糖是通过以下提取工艺步骤得到的:
(1)以新鲜猪胎盘及产仔猪血为原料,去除胎膜和脐带,用纯水冲洗干净,依次用绞肉机、胶体磨、研磨机粉碎后,放-20℃以下冷库速冻24h,然后取出37℃水浴融化,如此冻融3次后置于反应釜中进行消化酶解;
(2)向反应釜中加2倍原料重的生理盐水,加入原料重量20%的新鲜胰浆,用饱和氢氧化钙调pH值至7.5,间隙搅拌下,加热至50℃,消化10 h后,加热至60℃,用超声波发生器中波处理20 min,冷却至室温。用过滤式离心机离心过滤,滤液为酶解液;
(3)将酶解液用醋酸调pH值至4.0,放冷藏室静置过夜,然后高速(8000 r/min以上)4℃条件下离心20 min,分别收集上清液和沉淀,上清液即为脂多糖多肽粗提液;
(4)将脂多糖多肽粗提液用截留分子量10万的超滤装置进行超滤,透过液再经截留分子量1万超滤装置进行超滤,收集浓缩液即为脂多糖提取液。
其中的动物血干扰素是通过以下提取工艺步骤得到的:
(1)无菌采集健康动物鲜血,于10℃的条件下离心20min,吸取中间层白细胞,用质量分数为0.85%NH4Cl洗涤两次后离心,收集沉淀白细胞,除去NH4Cl,按照白细胞:培养液体 积比1:10加入含5%鸡血清的Eagle`sMEM混合培养液悬浮,将鸡白细胞数稀释在10×107 个/ml个/ml之间,制得鸡白细胞悬浮液;
(2)取一份鸡白细胞悬浮液,加入含100个活性单位的鸡白细胞干扰素,置于37℃水浴摇床搅拌培养48h;
(3)按照每毫升鸡白细胞悬液50HANDVⅡ的加入量,在细胞悬液中加入一定量新城疫病毒NDVⅡ,调节pH为7.5,在水浴恒温振荡器37℃旋转培养24h,培养完成后,用6MHCl 把培养液的pH调至3.5,在4℃下酸化处理4d,再用质量体积浓度6%的NaOH溶液把pH调至 7.2,离心去除沉淀,取上清液,制得鸡白细胞干扰素粗制液;
本发明动物胎盘脂多糖、动物血干扰素复合免疫增强剂的制备方法如下:
(1)取一份鸡白细胞干扰素粗制液,用NaOH溶液调节pH值到8.5,在冰浴条件下,按照干扰素粗制液:聚乙二醇酯摩尔比1:5向溶液中加入聚乙二醇酯,聚乙二醇酯加入量为五份,升温至4℃,搅拌反应2h,向溶液中加入五份聚乙二醇酯,升温至12℃,搅拌反应2h,向溶液中加入五份聚乙二醇酯,升温至25℃,搅拌反应2h,向溶液加入五份聚乙二醇酯,升温至36℃,搅拌反应2h,完全反应后,加入0.75Μ的半胱甘氨酸终止反应,得到聚乙二醇酯修饰的干扰素;
(2)先将聚乙二醇修饰的干扰素和脂多糖按配方称重后混合,加入总体积50%的生理盐水,搅拌均匀,后经过0.22μm除菌膜除菌;
(3)在净化百级条件下无菌操作将灭菌后混合液用饱和氢氧化钙调pH值至6.0,搅拌均匀,最后用灭菌生理盐水加至总体积即为复合无菌液;
(4)将复合无菌液按规格要求直接灌封,冷冻保存。
实施例2
一种动物胎盘脂多糖、动物血干扰素复合免疫增强剂,由下述重量份的原料组成:以羊胎盘脂多糖、鸭血干扰素为主要原料,加有无菌生理盐水以及辅料组成,其具体配方为每100 mL中含有胎盘脂多糖30 mg;干扰素10800IU;聚乙二醇酯20g;余量由无菌生理盐水补足,pH为8.0。
其中的动物胎盘脂多糖是通过以下提取工艺步骤得到的:
(1)以新鲜羊胎盘为原料,去除胎膜和脐带,用纯水冲洗干净,依次用绞肉机、胶体磨、研磨机粉碎后,放-20℃以下冷库速冻48 h,然后取出37℃水浴融化,如此冻融5次后置于反应釜中进行消化酶解;
(2)向反应釜中加3倍原料重的生理盐水,加入原料重量40%的新鲜胰浆,用饱和氢氧化钙调pH值至8.5,间隙搅拌下,加热至55℃,消化12 h后,加热至60℃,用超声波发生器中波处理30 min,冷却至室温。用过滤式离心机离心过滤,滤液为酶解液;
(3)将酶解液用醋酸调pH值至6.0,放冷藏室静置过夜,然后高速(8000 r/min以上)8℃条件下离心30 min,分别收集上清液和沉淀,上清液即为脂多糖多肽粗提液;
(4)将脂多糖多肽粗提液用截留分子量10万的超滤装置进行超滤,透过液再经截留分子量1万超滤装置进行超滤,收集浓缩液即为脂多糖提取液。
其中的动物血干扰素是通过以下提取工艺步骤得到的:
(1)无菌采集健康动物鲜血,于10℃的条件下离心20min,吸取中间层白细胞,用质量分数为0.85%NH4Cl洗涤两次后离心,收集沉淀白细胞,除去NH4Cl,按照白细胞:培养液体积比1:10加入含5%鸭血清的Eagle`sMEM混合培养液悬浮,将鸭白细胞数稀释在25×107个/ml之间,制得鸭白细胞悬浮液;
(2)取一份鸭白细胞悬浮液,加入含100个活性单位的鸭白细胞干扰素,置于37℃水浴摇床搅拌培养48h;
(3)按照每毫升鸭白细胞悬液50HANDVⅡ的加入量,在细胞悬液中加入一定量新城疫病毒NDVⅡ,调节pH为7.5,在水浴恒温振荡器37℃旋转培养24h,培养完成后,用6MHCl 把培养液的pH调至3.5,在4℃下酸化处理4d,再用质量体积浓度6%的NaOH溶液把pH调至 7.2,离心去除沉淀,取上清液,制得鸭白细胞干扰素粗制液;
本发明动物胎盘脂多糖、动物血干扰素复合免疫增强剂的制备方法如下:
(1)取一份鸭白细胞干扰素粗制液,用NaOH溶液调节pH值到8.5,在冰浴条件下,按照干扰素粗制液:聚乙二醇酯摩尔比1:5向溶液中加入聚乙二醇酯,聚乙二醇酯加入量为五份,升温至4℃,搅拌反应2h,向溶液中加入五份聚乙二醇酯,升温至12℃,搅拌反应2h,向溶液中加入五份聚乙二醇酯,升温至25℃,搅拌反应2h,向溶液加入五份聚乙二醇酯,升温至36℃,搅拌反应2h,完全反应后,加入0.75Μ的半胱甘氨酸终止反应,得到聚乙二醇酯修饰的干扰素;
(2)先将聚乙二醇修饰的干扰素和脂多糖按配方称重后混合,加入总体积80%的生理盐水,搅拌均匀,后经过0.22μm除菌膜除菌;
(3)在净化百级条件下无菌操作将灭菌后混合液用饱和氢氧化钙调pH值至8.0,搅拌均匀,最后用灭菌生理盐水加至总体积即为复合无菌液;
(4)将复合无菌液按规格要求直接灌封,冷冻保存。
实施例3
一种动物胎盘脂多糖、动物血干扰素复合免疫增强剂,由下述重量份的原料组成:以牛胎盘脂多糖、鹅血干扰素为主要原料,加有无菌生理盐水以及辅料组成,其具体配方为每100 mL中含有胎盘脂多糖20 mg;干扰素10600IU;聚乙二醇酯18g;余量由无菌生理盐水补足,pH为7.0。
其中的动物胎盘脂多糖是通过以下提取工艺步骤得到的:
(1)以新鲜牛胎盘为原料,去除胎膜和脐带,用纯水冲洗干净,依次用绞肉机、胶体磨、研磨机粉碎后,放-20℃以下冷库速冻36 h,然后取出37℃水浴融化,如此冻融4次后置于反应釜中进行消化酶解;
(2)向反应釜中加2.5倍原料重的生理盐水,加入原料重量30%的新鲜胰浆,用饱和氢氧化钙调pH值至8.0,间隙搅拌下,加热至52℃,消化11 h后,加热至60℃,用超声波发生器中波处理25 min,冷却至室温。用过滤式离心机离心过滤,滤液为酶解液;
(3)将酶解液用醋酸调pH值至5.0,放冷藏室静置过夜,然后高速(8000 r/min以上)7℃条件下离心25 min,分别收集上清液和沉淀,上清液即为脂多糖多肽粗提液;
(4)将脂多糖多肽粗提液用截留分子量10万的超滤装置进行超滤,透过液再经截留分子量1万超滤装置进行超滤,收集浓缩液即为脂多糖提取液。
其中的动物血干扰素是通过以下提取工艺步骤得到的:
(1)无菌采集健康动物鲜血,于10℃的条件下离心20min,吸取中间层白细胞,用质量分数为0.85%NH4Cl洗涤两次后离心,收集沉淀白细胞,除去NH4Cl,按照白细胞:培养液体 积比1:10加入含5%鹅血清的Eagle`sMEM混合培养液悬浮,将鹅白细胞数稀释在20×107 个/ml之间,制得鹅白细胞悬浮液;
(2)取一份鹅白细胞悬浮液,加入含100个活性单位的鹅白细胞干扰素,置于37℃水浴摇床搅拌培养48h;
(3)按照每毫升鹅白细胞悬液50HANDVⅡ的加入量,在细胞悬液中加入一定量新城疫病毒NDVⅡ,调节pH为7.5,在水浴恒温振荡器37℃旋转培养24h,培养完成后,用6MHCl 把培养液的pH调至3.5,在4℃下酸化处理4d,再用质量体积浓度6%的NaOH溶液把pH调至 7.2,离心去除沉淀,取上清液,制得鹅白细胞干扰素粗制液;
本发明动物胎盘脂多糖、动物血干扰素复合免疫增强剂的制备方法如下:
(1)取一份鹅白细胞干扰素粗制液,用NaOH溶液调节pH值到8.5,在冰浴条件下,按照干扰素粗制液:聚乙二醇酯摩尔比1:5向溶液中加入聚乙二醇酯,聚乙二醇酯加入量为五份,升温至4℃,搅拌反应2h,向溶液中加入五份聚乙二醇酯,升温至12℃,搅拌反应2h,向溶液中加入五份聚乙二醇酯,升温至25℃,搅拌反应2h,向溶液加入五份聚乙二醇酯,升温至36℃,搅拌反应2h,完全反应后,加入0.75Μ的半胱甘氨酸终止反应,得到聚乙二醇酯修饰的干扰素;
(2)先将聚乙二醇修饰的干扰素和脂多糖按配方称重后混合,加入总体积70%的生理盐水,搅拌均匀,后经过0.22μm除菌膜除菌;
(3)在净化百级条件下无菌操作将灭菌后混合液用饱和氢氧化钙调pH值至7.0,搅拌均匀,最后用灭菌生理盐水加至总体积即为复合无菌液;
(4)将复合无菌液按规格要求直接灌封,冷冻保存。
上述实施例,只是本发明的较佳实施例,并非用来限制本发明实施范围,故凡以本发明权利要求所述内容所做的等效变化,均应包括在本发明权利要求范围之内。
Claims (5)
1.一种动物胎盘脂多糖、动物血干扰素复合免疫增强剂,其特征在于,所述复合免疫增强剂,包括下述重量份的原料:以动物胎盘脂多糖、动物血干扰素为主要原料,加有无菌生理盐水以及辅料组成,其具体配方为每100 mL中含有胎盘脂多糖5-30 mg;干扰素10500-10800IU;聚乙二醇酯15-20g;余量由无菌生理盐水补足,pH为6.0-8.0。
2.根据权利要求1所述的一种动物胎盘脂多糖、动物血干扰素复合免疫增强剂,其特征在于,所述动物胎盘采用猪、牛、羊其中一种或多种的胎盘,所述动物血为猪、牛、羊、鸡、鸭、鹅其中一种或多种的血液。
3.根据权利要求1所述的一种动物胎盘脂多糖、动物血干扰素复合免疫增强剂,其特征在于,所述其中的动物胎盘脂多糖是通过以下提取工艺步骤得到的:
以新鲜动物胎盘为原料,去除胎膜和脐带,用纯水冲洗干净,依次用绞肉机、胶体磨、研磨机粉碎后,放-20℃以下冷库速冻24-48 h,然后取出37℃水浴融化,如此冻融3-5次后置于反应釜中进行消化酶解;
(2)向反应釜中加2-3倍原料重的生理盐水,加入原料重量20-40%的新鲜胰浆,用饱和氢氧化钙调pH值至7.5-8.5,间隙搅拌下,加热至50-55℃,消化10-12 h后,加热至60℃,用超声波发生器中波处理20-30 min,冷却至室温;用过滤式离心机离心过滤,滤液为酶解液;
(3)将酶解液用醋酸调pH值至4.0-6.0,放冷藏室静置过夜,然后在8000 r/min以上高速,4-8℃条件下离心20-30 min,分别收集上清液和沉淀,上清液即为脂多糖多肽粗提液;
(4)将脂多糖多肽粗提液用截留分子量10万的超滤装置进行超滤,透过液再经截留分子量1万超滤装置进行超滤,收集浓缩液即为脂多糖提取液。
4.根据权利要求1所述的一种动物胎盘脂多糖、动物血干扰素复合免疫增强剂,其特征在于,所述其中的动物血干扰素是通过以下提取工艺步骤得到的:
(1)无菌采集健康动物鲜血,于10℃的条件下离心20min,吸取中间层白细胞,用质量分数为0.85%NH4Cl洗涤两次后离心,收集沉淀白细胞,除去NH4Cl,按照白细胞:培养液体积比1:10加入含5%动物血清的Eagle`sMEM混合培养液悬浮,将动物白细胞数稀释在10×107 个/ml~25×107个/ml之间,制得动物白细胞悬浮液;
(2)取一份动物白细胞悬浮液,加入含100个活性单位的动物白细胞干扰素,置于37℃水浴摇床搅拌培养48h;
(3)按照每毫升动物白细胞悬液50HANDVⅡ的加入量,在细胞悬液中加入一定量新城疫病毒NDVⅡ,调节pH为7.5,在水浴恒温振荡器37℃旋转培养24h,培养完成后,用6MHCl 把培养液的pH调至3.5,在4℃下酸化处理4d,再用质量体积浓度6%的NaOH溶液把pH调至 7.2,离心去除沉淀,取上清液,制得动物白细胞干扰素粗制液。
5.一种如权利要求1所述的动物胎盘脂多糖、动物血干扰素复合免疫增强剂的制备方法,其特征在于,包括如下步骤:
(1)取一份动物白细胞干扰素粗制液,用NaOH溶液调节pH值到8.5,在冰浴条件下,按照干扰素粗制液:聚乙二醇酯摩尔比1:5向溶液中加入聚乙二醇酯,聚乙二醇酯加入量为五份,升温至4℃,搅拌反应2h,向溶液中加入五份聚乙二醇酯,升温至12℃,搅拌反应2h,向溶液中加入五份聚乙二醇酯,升温至25℃,搅拌反应2h,向溶液加入五份聚乙二醇酯,升温至36℃,搅拌反应2h,完全反应后,加入0.75Μ的半胱甘氨酸终止反应,得到聚乙二醇酯修饰的干扰素;
(2)先将聚乙二醇修饰的干扰素和脂多糖按配方称重后混合,加入总体积50-80%的生理盐水,搅拌均匀,后经过0.22μm除菌膜除菌;
(3)在净化百级条件下无菌操作将灭菌后混合液用饱和氢氧化钙调pH值至6.0-8.0,搅拌均匀,最后用灭菌生理盐水加至总体积即为复合无菌液;
(4)将复合无菌液按规格要求直接灌封,冷冻保存。
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