CN104341499B - 抗麻疹与百白破四价卵黄抗体制剂的制备工艺 - Google Patents
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Abstract
抗麻疹与百白破四价卵黄抗体制剂的制备工艺,包括如下步骤:免疫接种疫苗鸡的选择‑免疫接种疫苗制备及剂量‑免疫程序‑卵黄分离方法与技巧‑卵黄抗体水溶性组分液(WSF)制备‑卵黄抗体分离提取‑卵黄抗体提取物无菌处理‑PEG溶液配制‑透析袋处理。本发明从鸡蛋中制备高纯度和高效价的百白破的特异性卵黄抗体IgY,鸡蛋作为正常的膳食成分其IgY是没有毒副作用的,提纯的IgY是现代理想的免疫增强剂和治疗剂,制备方便,安全可靠,可用于人群麻疹与百白破的预防和治疗,特别是儿童暴露下的紧急预防和治疗。
Description
技术领域
本发明涉及医药生物技术领域,特别是涉及一种抗麻疹与百白破四价卵黄抗体制剂的制备工艺。
背景技术
麻疹(measles)是由麻疹病毒引起一种严重危害儿童健康的急性呼吸道传染病,传染性极强,儿童是主要易感人群(尤多见于婴儿)。麻疹病毒(measles virus)属副粘病毒科,是麻疹的病原体,麻疹病毒主要通过喷嚏、咳嗽和说话等途径由飞沫传播。麻疹最常见并发症为肺炎,是麻疹死亡主要原因,还有喉炎、脑炎、肝损害等,特别当儿童营养不良时,常常引起并发症死亡,迄今为止麻疹仍是低龄儿童中疫苗可预防性传染病导致死亡的首要原因之一。包括我国在内的世界卫生组织西太平洋区域每年大约有3万名儿童死于麻疹。因此其危害在疫苗可预防疾病中仍占有重要地位。目前WHO已将麻疹定为继天花、脊髓灰质炎之后的第三个将被消除或消灭的疾病。
百白破疫苗是百日咳、白喉、破伤风混合疫苗的简称,它是由百日咳疫苗、精制白喉和破伤风类毒素按适量比例配制而成,用于预防百日咳、白喉、破伤风三种疾病。百日咳(bronchocephalitis)是小儿常见的高传染性急性呼吸道传染病,感染对象多为5 岁以下婴幼儿,其致病菌是百日咳杆菌,主要通过空气传播,人类是百日咳杆菌的唯一宿主。其主要的临床表现特征为阵发性痉挛性咳嗽,咳嗽末伴有特殊的吸气吼声,病程可达数周甚至3个月左右,故有百日咳之称。据据报道,每年全球有200万-4000万例百日咳病例,且约35万死亡病例,即使在一些免疫接种覆盖率很高的发达国家,近年来百日咳发病率也呈明显上升趋势。白喉(diphtheritis)白喉是由白喉杆菌所引起的一种急性呼吸道疾病,由白喉棒状杆菌产毒株感染引起,具有极强的传染性,为乙类传染病,多发生于秋冬或早春季节,15岁以下儿童发病率约占90%,其中1~5岁儿童发病率最高。其主要的临床表现以发热,气憋,声音嘶哑,犬吠样咳嗽,咽、扁桃体及其周围组织出现白色伪膜为特征,严重者可并发心肌炎和神经麻痹,全身中毒症状明显。自从实施白喉毒素的接种以来,白喉的发病率明显下降,但大龄的患者构成比偏多,所以加强对大龄者的预防接种是防止白喉再次流行的重要手段。破伤风(lockjaw)是由梭状芽胞杆菌感染引起的常和创伤相关的一种急性致命性疾病,典型症状是在肌紧张性收缩(肌强直、发硬)的基础上,阵发性强烈痉挛,通常最先受影响的肌群是咀嚼肌,随后顺序为面部表情肌、颈、背、腹、四肢肌,最后为膈肌,破伤风杆菌及其毒素不能侵入正常的皮肤和黏膜,一切开放性损伤,均有可能发生破伤风,另外还可能发生于不洁条件下分娩的产妇和新生儿。新生儿破伤风由脐带感染引起,病死率很高,虽然世界卫生组织积极推行了全球免疫计划,据估计全世界每年仍有近百万破伤风病例,数十万新生儿死于破伤风。
IgY及理化性质:禽类的免疫系统包括细胞免疫和体液免疫系统,分别受胸腺和法氏囊的控制。当机体受到外来抗原刺激后,法氏囊内的B细胞分化成为浆细胞,分泌特异性抗体进入血液循环,当血液流经卵巢时,特异性抗体(主要是IgG)在卵细胞中逐渐蓄积,形成卵黄抗体(yolk antibody, IgY),IgY的理化性质与哺乳动物的IgG相似。正常鸡IgY的分子量约为180KDa,由两条轻链(2L)和两条重链(2H)组成,分子量分别为60-70KDa和22-30KDa。其等电点约为5.2。 IgY与一般哺乳动物IgG相比,具有较强的耐热、耐酸、抗离子强度和一定的抗酶降解能力。 在低于75℃条件下,IgY具有良好的热稳定性。IgY制剂在4℃贮存5年或在室温贮存6个月其活性仍无明显变化或下降,65℃时可保持24h以上,70℃时加热90min后其活性才明显下降,60℃,30min条件下巴氏消毒不影响IgY,高于80℃,大部分IgY失去活性。 IgY对胃蛋白酶有较高的抵抗力,但对胰蛋白酶十分敏感。将胃蛋白酶和IgY在pH2.0温育1h后,几乎所有活性丧失,但在pH4.0时1h后可保持91%的活性,甚至温育10h后仍有63%活性。IgY分别与胰蛋白酶和胰凝乳酶温育8h,活性分别保持39%和41%。
IgY的作用机理:特定病原菌的IgY能直接黏附于病原菌的细胞壁上,改变病原细胞的完整性,直接抑制病原菌的生长;IgY可黏附于细菌的菌毛上,使之不能黏附于肠道黏膜上皮细胞;一部分IgY在肠道消化酶作用下,降解为可结合片段,这些片段含有抗体的可变小肽(Fab)部分,这些小肽很容易被肠道吸收,进入血液后能与特定的病原菌黏附因子结合,使病原菌不能黏附易感细胞而失去致病性,而IgY的稳定区(Fe部分)留在肠内。
发明内容
本发明的目的在于提供一种抗麻疹与百白破四价卵黄抗体制剂的制备工艺,用于人群麻疹和百白破的预防和治疗,特别是儿童暴露下的紧急预防和治疗。
抗麻疹与百白破四价卵黄抗体制剂的制备工艺,包括如下步骤:
1)免疫接种疫苗鸡的选择:选择健康状态良好,17-18周龄粤禽鸡;
2)免疫接种疫苗制备及剂量:麻疹疫苗与百白破疫苗1:1比例混合,每只鸡免疫接种人用麻疹疫苗每次量为0.75ml;
3)免疫程序:免疫途径为皮下注射,免疫次数为4次,免疫时间为第1次与第2次间隔为3天,第3次与第4次间隔为7天,免疫注射技巧为3点注射;
4)卵黄分离方法与技巧:用75%酒精浸泡鸡蛋5-10分钟,取出鸡蛋用清水冲洗,干净纱布将蛋壳擦干,用剪刀打开蛋壳一个小孔,让蛋清缓慢流出,顺流尽蛋清,打开蛋壳,小心将整个蛋黄移至灭菌滤纸上,来回流动,除尽蛋清,取蛋黄加入量杯,记录卵黄量;
5)卵黄抗体水溶性组分液(WSF)制备:按卵黄量的8倍加入灭菌的双蒸水,用0.1MHCl调卵黄稀释液PH为5.0-5.1,放置在4℃环境下搅拌8小时取出,在4℃环境下将卵黄稀释液放入离心机中以10000-12000转/分钟,离心15分钟,收取得卵黄抗体水溶性组分液上清液;
6)卵黄抗体分离提取方法:将卵黄抗体水溶性组分液上清液加入8%PEG6000100ml,搅拌30分钟,然后在4℃环境下放入离心机中以10000-12000转/分钟,离心15分钟,收集沉淀,去上清液,沉淀装入透析袋透析;
7)卵黄抗体提取物无菌处理:将直径0.22µm过滤膜装入滤器,高压蒸汽灭菌后抗体提取物过滤,即为无菌抗体,将卵黄抗体置-20℃保存备用,保存期2年;
8)PEG溶液配制:用PBS(0.01mol/L PH7.4)配制;
9)透析袋处理:将透析袋放入300ml透析处理液(2%NaHCO3、1mmol/L EDTA,PH8.0)中煮沸10分钟后,以蒸馏水彻底漂洗后再用300ml(PH 8.0)1mmol/LEDTA液中煮沸10分钟,最后用灭菌的双蒸水里外彻底冲洗。
所述步骤3)免疫注射技巧3点注射为,胸部一点,两翼下各一点。
所述步骤4)打开蛋壳一个小孔后,从小孔内注入少量无菌NS洗净蛋清。
采用上述技术方案的有益效果是:
本发明从鸡蛋中制备高纯度和高效价的百白破的特异性卵黄抗体IgY, 鸡蛋作为正常的膳食成分其IgY是没有毒副作用的,提纯的IgY是现代理想的免疫增强剂和治疗剂,制备方便,安全可靠,可用于人群麻疹与百白破的预防和治疗,特别是儿童暴露下的紧急预防和治疗。
具体实施方式
一、免疫家禽:
1)免疫原制备: 免疫原为人用麻疹与百白破疫苗,将麻疹与百白破疫苗无菌条件下1:1比例进行混合;
2)免疫家禽:选择17-18周龄粤禽鸡四只,将免疫原注射到粤禽鸡体内,每只免疫原注射量0.75ml,免疫途径为皮下注射,免疫次数为4次,免疫时间为第1次与第2次间隔为3天,第3次与第4次间隔为7天,免疫注射技巧为3点注射;加强免疫时免疫剂量与方法与首次免疫相同;
3)收集鸡蛋:免疫结束后收集鸡蛋,收集从最后一次免疫算起每日鸡蛋,将鸡蛋编号并做好记录,并于4℃冰箱保存备用,(收集粤禽鸡未免疫前鸡蛋为阴性对照)。
二、提取卵黄抗体:
1)将收集的鸡蛋用75%酒精浸泡5-10分钟;
2)将鸡蛋取出,用清水冲洗,干净纱布将蛋壳擦干;
3)将鸡蛋蛋壳用剪刀打开一个小孔,让蛋清缓慢流出,直至流尽蛋清,并从小孔内注入少量无菌NS将残余蛋清洗净;
4)把只剩蛋黄的蛋壳用小镊子轻轻打开,小心将整个卵黄移至灭菌滤纸上,来回流动,除尽蛋清;
5)把卵黄加入无菌量杯,记录卵黄量(大约8-10g),然后加入8倍灭菌的双蒸水与量杯中制成卵黄稀释液;
6)用0.1M HCl小心调节卵黄稀释液的PH值,使其PH为5.0-5.1,然后将其置4℃冰箱搅拌8小时;
7)搅拌结束后,从冰箱取出卵黄稀释液,在4℃环境下将卵黄稀释液放入高速低温离心机中以10000-12000转/分钟,离心15分钟,收取得卵黄抗体水溶性组分液上清液(WSF);
8)于水溶性组分液上清液(WSF)中加入PBS(0.01mol/L PH7.4)配制8%PEG6000100ml(20g卵黄时),将其同一方向搅拌30分钟,在4℃的环境下置于高速低温离心机以10000-12000转/分钟,离心,收集沉淀,除去上清液;
9)将透析袋于300ml透析处理液(2%NaHCO3、1mmol/L EDTA,PH 8.0)中煮沸10分钟后,将透析袋以蒸馏水彻底漂洗后,再在300ml(PH 8.0)1mmol/LEDTA液中煮沸10分钟,再以灭菌水里外彻底冲洗;
10)将收集的沉淀装入透析袋,透析24h后,0.22µm膜过滤,然后于-20℃保存;
11)IgY含量测定(mg/ml)=(OD280-OD403×0.3)×0.62;
12)IgY效价测定双向琼脂扩散试验效价≧1:16,ELISA试验≧1:8000。
本发明制剂具有特异性预防麻疹和百白破的功能,增强非特异性免疫功能。该制剂无过敏反应,服用安全,简便,采用口服给药途径,不受条件限制,不影响该制剂的生物学活性,是一种高效安全的制剂。
Claims (3)
1.抗麻疹与百白破四价卵黄抗体制剂的制备工艺,其特征在于:该工艺包括如下步骤:
1)免疫接种疫苗鸡的选择:选择健康状态良好,17-18周龄粤禽鸡;
2)免疫接种疫苗制备及剂量:麻疹疫苗与百白破疫苗1:1比例混合,每只鸡免疫接种人用麻疹疫苗与百白破疫苗的混合疫苗每次量为0.75ml;
3)免疫程序:免疫途径为皮下注射,免疫次数为4次,免疫时间为第1次与第2次间隔为3天,第3次与第4次间隔为7天,免疫注射技巧为3点注射;
4)卵黄分离方法与技巧:用75%酒精浸泡鸡蛋5-10分钟,取出鸡蛋用清水冲洗,干净纱布将蛋壳擦干,用剪刀打开蛋壳一个小孔,让蛋清缓慢流出,顺流尽蛋清,打开蛋壳,小心将整个蛋黄移至灭菌滤纸上,来回流动,除尽蛋清,取蛋黄加入量杯,记录卵黄量;
5)卵黄抗体水溶性组分液(WSF)制备:按卵黄量的8倍加入灭菌的双蒸水,用0.1M HCl调卵黄稀释液PH为5.0-5.1,放置在4℃环境下搅拌8小时取出,在4℃环境下将卵黄稀释液放入离心机中以10000-12000转/分钟,离心15分钟,收取得卵黄抗体水溶性组分液上清液;
6)卵黄抗体分离提取方法:将卵黄抗体水溶性组分液上清液加入8%PEG6000 100ml,搅拌30分钟,然后在4℃环境下放入离心机中以10000-12000转/分钟,离心15分钟,收集沉淀,去上清液,沉淀装入透析袋透析;
7)卵黄抗体提取物无菌处理:将直径0.22µm过滤膜装入滤器,高压蒸汽灭菌后抗体提取物过滤,即为无菌抗体,将卵黄抗体置-20℃保存备用,保存期2年;
8)PEG溶液配制:用0.01mol/L 、PH7.4的PBS配制;
9)透析袋处理:将透析袋放入2%NaHCO3、1mmol/L EDTA,PH 8.0的透析处理液300ml中煮沸10分钟后,以蒸馏水彻底漂洗后再用300ml PH 8.0的1mmol/LEDTA液煮沸10分钟,最后用灭菌的双蒸水里外彻底冲洗。
2.如权利要求1所述的抗麻疹与百白破四价卵黄抗体制剂的制备工艺,其特征在于:所述步骤3)免疫注射技巧3点注射为,胸部一点,两翼下各一点。
3.如权利要求1所述的抗麻疹与百白破四价卵黄抗体制剂的制备工艺,其特征在于:所述步骤4)打开蛋壳一个小孔后,从小孔内注入少量无菌生理盐水洗净蛋清。
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