CN112812989B - 一种能够缓解银屑病的青春双歧杆菌及其应用 - Google Patents
一种能够缓解银屑病的青春双歧杆菌及其应用 Download PDFInfo
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Abstract
本发明公开了一种能够缓解银屑病的青春双歧杆菌及其应用,属于微生物技术领域以及医药技术领域。本发明提供的青春双歧杆菌(Bifidobacterium adolescentis)CCFM667具有缓解银屑病的作用,银屑病样小鼠病变皮肤情况缓解和抑制银屑病样小鼠皮肤表皮层增厚,并使银屑病样小鼠脾脏重量减轻,使银屑病样小鼠皮肤中IL‑22、IL‑23水平降低30.2%,在制备预防和/或治疗银屑病的产品(如食品、药品或保健食品等)中,具有巨大的应用前景。
Description
技术领域
本发明涉及一种能够缓解银屑病的青春双歧杆菌及其应用,属于微生物技术领域以及医药技术领域。
背景技术
银屑病是一种慢性的、免疫介导的疾病,主要影响皮肤和关节处,具有复杂的遗传性,全球患病率约为2-3%,并且患病率逐年有所上升。虽然可在任意年龄阶段发病,但在18-39 岁或50-69岁之间的发病率最高。作为一种皮肤病,银屑病可表现为多种表型,包括斑块型银屑病(又称寻常型银屑病)、点状银屑病、逆型银屑病、脓疱性银屑病、掌跖牛皮癣和红皮病性银屑病。同一个体可能出现多种表型,其中寻常型银屑病是最常见的。所有表型共有的症状包括瘙痒、灼痛和酸痛等。银屑病不会危及生命,但严重影响患者身体健康,且因为其在皮肤上层会出现很多大小不一的丘疹和红斑,并且表面还会覆盖着银白色鳞屑,且多产生于头皮、手脚伸侧易被他人看见的部位,影响患者社交生活,也给患者的心理带来了极大的压力。
银屑病是一种全身性炎症性疾病,是一种遗传、环境、免疫等共同介导的疾病,其发病机制尚未完全明确。免疫相关细胞释放的促炎性细胞因子增多以及先天性和适应性免疫系统的慢性激活被认为是导致多个组织和器官长期受损的机制。目前多种银屑病相关的异常已被报道,包括抗原提呈、NF-κB信号通路的激活、辅助性T细胞群(尤其是IL-17的主要来源的TH17细胞)的分化和IL-17反应的增强,这些异常促进了宿主的免疫应答和免疫细胞的浸润。
银屑病目前没有彻底治愈的医疗方法和药物,这仍然是一个世界性医疗难题。其在临床中有较多特征表现和变化,如何采用有针对性的治疗措施一直是医学界广泛探讨的课题,中西医在治疗方法上各有不同,随着银屑病基因学的发展,对于银屑病的发病机理和治疗方法有了不同的认识和进展,但距离彻底治愈银屑病还在不断探索。根据银屑病严重程度不同要进行差异化治疗,选择不同的药物和治疗手段,医学界将皮损治疗病程分为进行期、静止期、退行期三个阶段。目前治疗银屑病的中西医药物很多,也尝试了很多不同的治疗方法,但都不能完全根治,只能缓解发生症状和降低复发几率,且大多伴有不同的副作用。
益生菌是通过定殖在人体内,改变宿主某一部位菌群组成的一类对宿主有益的活性微生物。通过调节宿主黏膜与系统免疫功能或通过调节肠道内菌群平衡,促进营养吸收保持肠道健康的作用,从而产生有利于健康作用的单微生物或组成明确的混合微生物。大量文献报道了银屑病患者肠道菌群的失衡,多种益生菌相对丰度下降,如艾克曼菌(Akkermansia muciniphila)、普拉梭菌(Faecalibacterium prausnitzii)等,因此通过补充益生菌从而缓解银屑病似乎成了一种可能。国外相关研究也证实了该种可能,Chen等人用戊糖乳杆菌 (Lactobacillus pentosus)GMNL-77干预银屑病样小鼠,结果显示,该戊糖乳杆菌缓解了银屑病病情。David等人发现26个银屑病患者连续口服婴儿双歧杆菌(Bifidobacterium infantis) 6周后,患者病情得到缓解。但该菌株仅缓解了患者血清中的炎症水平,未阐述对皮肤的缓解作用。
因此,或许可通过开发能够缓解银屑病的益生菌,从而解决银屑病难治疗、易反复、副作用大的现状。
发明内容
技术问题:本发明要解决的技术问题是提供一株能够缓解银屑病的益生菌。
本发明的第一个目的是提供一株青春双歧杆菌(Bifidobacteriumadolescentis)CCFM667,所述青春双歧杆菌(Bifidobacterium adolescentis)CCFM667已于2020年12月7日保藏于广东省微生物菌种保藏中心,保藏编号为GDMCC No:61349,保藏地址为广州市先烈中路100 号大院59号楼5楼。
本发明的青春双歧杆菌(Bifidobacterium adolescentis)CCFM667经测序分析,其16S rRNA 序列如SEQ ID NO.1所示,将该序列在NCBI中进行核酸序列比对,结果显示菌株为青春双歧杆菌(Bifidobacterium adolescentis),命名为青春双歧杆菌(Bifidobacterium adolescentis) CCFM667。
本发明的青春双歧杆菌(Bifidobacterium adolescentis)CCFM667的微生物形态学特征为:细胞呈轻微不规则、圆形末端的弯曲杆菌,非运动性、不产芽孢。
本发明的第二个目的是提供含有所述青春双歧杆菌CCFM667的组合物。
在一种实施方式中,所述组合物中青春双歧杆菌的数量≥1×105CFU/g或1×105CFU/mL。
本发明的第三个目的是提供所述青春双歧杆菌(Bifidobacteriumadolescentis)CCFM667 在制备缓解银屑病的产品中的应用。
在一种实施方式中,所述缓解银屑病包括:缓解皮肤褶皱、鳞屑和/或红斑症状,抑制皮肤角质增厚。
在一种实施方式中,所述产品包括但不限于食品、功能性食品、保健品或药物。
在一种实施方式中,所述产品中青春双歧杆菌(Bifidobacterium adolescentis)CCFM667 的活菌数不低于1×106CFU/mL。
在一种实施方式中,所述药物含有青春双歧杆菌(Bifidobacteriumadolescentis)CCFM667、药物载体和/或药用辅料。
在一种实施方式中,所述药物载体包含微囊、微球、纳米粒以及脂质体。
在一种实施方式中,所述药用辅料包含赋形剂以及附加剂。
在一种实施方式中,所述药用辅料包含抗黏合剂、渗透促进剂、缓冲剂、增塑剂、表面活性剂、消泡剂、增稠剂、包合剂、吸收剂、保湿剂、溶剂、抛射剂、增溶剂、助溶剂、乳化剂、着色剂、pH值调节剂、黏合剂、崩解剂、填充剂、润滑剂、润湿剂、整合剂、渗透压调节剂、稳定剂、助流剂、矫味剂、防腐剂、发泡剂、助悬剂、包衣材料、芳香剂、稀释剂、絮凝剂与反絮凝剂、助滤剂以及释放阻滞剂。
在一种实施方式中,所述附加剂包含微晶纤维素、羟丙基甲基纤维素以及精制卵磷脂。
在一种实施方式中,所述药物的剂型包含颗粒剂、胶囊剂、片剂、丸剂或口服液。
在一种实施方式中,所述食品包含使用含有青春双歧杆菌(Bifidobacteriumadolescentis) CCFM667的发酵剂生产得到的乳制品、豆制品或果蔬制品。
在一种实施方式中,所述食品是含有青春双歧杆菌(Bifidobacteriumadolescentis) CCFM667的固体饮料。
在一种实施方式中,所述发酵剂的制备方法为:将青春双歧杆菌(Bifidobacterium adolescentis)CCFM667按照占培养基总质量2~4%的接种量接种到培养基中,于37℃下培养30h,得到培养液;将培养液离心,得到菌体;将菌体用pH为7.2的磷酸盐缓冲液清洗3 次后用冻干保护剂重悬(冻干保护剂和菌体的质量比为2:1),得到重悬液;将重悬液采用真空冷冻法进行冻干,得到青春双歧杆菌(Bifidobacterium adolescentis)CCFM667的发酵剂。
在一种实施方式中,所述培养基包含占培养基总质量87.7%的水、10%的脱脂乳、0.5%的葡萄糖、1.5%的胰蛋白胨以及0.3%的酵母浸膏溶解。
在一种实施方式中,所述培养基的pH为6.8。
在一种实施方式中,所述脱脂奶粉:麦芽糊精:L-谷氨酸钠=8~10:8~10:1。
本发明还要求保护所述青春双歧杆菌CCFM667在食品领域的应用。
有益效果:本发明提供一株具有缓解银屑病的作用青春双歧杆菌(Bifidobacterium adolescentis)CCFM667,具体体现在:
(1)使银屑病样小鼠病变皮肤情况缓解和改善;
(2)银屑病样小鼠皮肤表皮层增厚被抑制;
(3)银屑病样小鼠脾脏重量减轻21.9%;
(4)银屑病样小鼠皮肤中IL-22水平降低30.2%;
(5)银屑病样小鼠皮肤中IL-23水平降低24.6%;
因此,青春双歧杆菌(Bifidobacterium adolescentis)CCFM667在制备预防和/或治疗银屑病的产品(如食品、药品或保健食品等)中,具有巨大的应用前景。
生物材料保藏
青春双歧杆菌(Bifidobacterium adolescentis)CCFM667,分类命名为Bifidobacterium adolescentis,已于2020年12月7日保藏于广东省微生物菌种保藏中心,保藏编号为GDMCC No:61349,保藏地址为广州市先烈中路100号大院59号楼5楼。
附图说明
图1:不同组别实验小鼠病变皮肤情况。
图2:不同组别实验小鼠皮肤病理切片。
图3:不同组别实验小鼠脾脏重量。
图4:不同组别实验小鼠皮肤中IL-22含量。
图5:不同组别实验小鼠皮肤中IL-23含量。
具体实施方式
下面结合具体实施例对本发明进行进一步的阐述。
下述实施例中涉及的培养基如下:
mMRS培养基配方(1L):蛋白胨10g,牛肉膏10g,酵母粉5g,葡萄糖20g,K2HPO4 2g,柠檬酸二铵2g,乙酸钠2g,吐温80 1mL,MgSO4·7H2O 0.5g,半胱氨酸盐酸盐0.5g, MnSO4·4H2O 0.25g,pH为7.2~7.4。
mMRS固体培养基配方(1L):蛋白胨10g,牛肉膏10g,酵母粉5g,葡萄糖20g, K2HPO42g,柠檬酸二铵2g,乙酸钠2g,吐温80 1mL,MgSO4·7H2O 0.5g,半胱氨酸盐酸盐0.5g,MnSO4·4H2O 0.25g,琼脂20g,pH为7.2~7.4。
下述实施例中涉及的检测方法如下:
活菌数的检测方法:采用国标《GB 4789.35-2016食品安全国家标准食品微生物学检测乳酸菌检测》。
酸度检测方法:采用国标GB 431334-2010。
青春双歧杆菌(Bifidobacterium adolescentis)1为按照实施例1采用相同方法分离获得的菌株,其16S rDNA序列如SEQ ID NO.2所示。
实施例1:青春双歧杆菌的筛选和鉴定
具体步骤如下:
以来源于人体粪便为样本,将样本经预处理后,在20%甘油中保存于-80℃冰箱,取出解冻后,混匀样本吸取0.5mL样本加到4.5mL,以含有0.05g/L半胱氨酸的9g/L生理盐水进行梯度稀释,选择合适的梯度稀释液涂布在MRS固体培养基上,于37℃培养48h,挑取副干酪乳杆菌的典型菌落至MRS固体培养基上划线纯化,挑取单菌落转接至MRS液体培养基 (含有0.05g/L半胱氨酸)增菌,30%甘油保藏,得到菌株CCFM667;其中,副干酪乳杆菌的典型菌落呈乳白色、不规则型、圆形凸起、光滑。
提取CCFM667的基因组,将CCFM667的16S rDNA进行扩增和测序(上海生工生物工程股份有限公司),将该序列在GenBank中进行比对,结果显示菌株为青春双歧杆菌,命名为青春双歧杆菌(Bifidobacterium adolescentis)CCFM667。
实施例2:青春双歧杆菌的培养
具体步骤如下:
将青春双歧杆菌(Bifidobacterium adolescentis)CCFM667接入mMRS固体培养基中于 37℃培养48h后,观察其菌落并在显微镜下对其菌体进行观察,发现其菌落乳白色、不规则型、圆形凸起、光滑,其菌体形状呈轻微不规则、圆形末端的弯曲杆菌,通常单个、成对和小簇存在。
将青春双歧杆菌(Bifidobacterium adolescentis)CCFM667接入MRS液体培养基中于37℃培养30h后,转入新鲜的MRS液体培养基中,同样条件培养30h,6000g离心菌体15min,0.9%生理盐水洗涤菌体后6000g再次离心10min,得到菌体,用30%蔗糖溶液重悬,获得菌蔗糖悬液,待用或冻存于-80℃。待给小鼠灌胃时,从-80℃取出后离心弃上清,用生理盐水重悬得到灌胃用的菌悬液。
实施例3:青春双歧杆菌对银屑病小鼠病变皮肤的缓解作用
将6-8周龄的SPF级BALB/c雌性小鼠分成4组,分别为正常组、模型组和实验组,其中,实验组1灌胃青春双歧杆菌CCFM667(以下简写为CCFM667组),实验组2灌胃青春双歧杆菌B.adolescentis 1(以下简写为B.adolescentis 1组),每组6只,饲养在江南大学实验动物中心,普通饲料喂养,恒定温度21-26℃,湿度40-70%,噪声小于等于60dB,动物照度15-20LX(所有动物实验程序皆由江南大学动物福利与伦理管理委员会进行审查并批准)。
实验周期共计3周,第3周开始造模,造模前一天对小鼠背部进行脱毛处理,面积约为 2.5cm×2.5cm。造模期间每天对模型组和实验组小鼠耳部和背部脱毛区涂抹咪喹莫特乳膏,耳部10mg,背部62.5mg,正常组仅涂抹等量的凡士林。实验期间,CCFM667组每天灌胃0.2mL (活菌数为1×109CFU/mL)的CCFM667菌悬液,B.adolescentis 1组每天灌胃0.2mL(活菌数为1×109CFU/mL)B.adolescentis 1菌悬液,正常组和模型组仅灌胃等量的无菌生理盐水作为对照,所有分组均为自由饮水和摄食。造模期间每天对小鼠背部情况拍照记录,于第4周第1天处死小鼠。结果见图1。
由图1可知,正常组小鼠背部脱毛区皮肤光滑,无鳞屑无红斑;而模型组小鼠背部脱毛区皮肤具有褶皱感,并覆有明显的鳞屑,伴有红斑;而CCFM667组较之模型组,背部脱毛区皮肤光滑,且基本无鳞屑不红斑;而B.adolescentis 1组小鼠背部脱毛区皮肤如模型组一样,具有褶皱感并覆有明显鳞屑,且有红斑。
以上实验结果表明,相比于青春双歧杆菌B.adolescentis 1,青春双歧杆菌(Bifidobacterium adolescentis)CCFM667更能够缓解银屑病小鼠病变皮肤的症状。
实施例4:青春双歧杆菌对银屑病小鼠角质增厚的抑制作用
将6-8周龄的SPF级BALB/c雌性小鼠分成4组,分别为正常组、模型组和实验组,其中,其中,实验组1灌胃青春双歧杆菌CCFM667(以下简写为CCFM667组),实验组2灌胃青春双歧杆菌B.adolescentis 1(以下简写为B.adolescentis 1组),每组6只,饲养在江南大学实验动物中心,普通饲料喂养,恒定温度21-26℃,湿度40-70%,噪声小于等于60dB,动物照度15-20LX(所有动物实验程序皆由江南大学动物福利与伦理管理委员会进行审查并批准)。
实验周期共计3周,第3周进行造模,造模前一天对小鼠背部进行脱毛处理,面积约为 2.5cm×2.5cm。造模期间每天对模型组和实验组小鼠耳部和背部脱毛区涂抹咪喹莫特乳膏,耳部10mg,背部62.5mg,正常组仅涂抹等量的凡士林。实验期间,CCFM667组每天灌胃0.2mL (活菌数为1×109CFU/mL)的CCFM667菌悬液,B.adolescentis 1组每天灌胃0.2mL(活菌数为1×109CFU/mL)B.adolescentis 1菌悬液,正常组和模型组仅灌胃等量的无菌生理盐水作为对照,所有分组均为自由饮水和摄食。于第4周第1天处死小鼠,取小鼠背部脱毛区部分皮肤制作病理学切片,进而进行组织病理学分析。结果见图2。
由图2可知,空白组小鼠皮肤表皮层仅由一层或两层细胞组成,表皮各层未见炎症反应;而模型组小鼠角质明显增厚,并伴有严重的炎症;而CCFM667组较之模型组,角质增厚现象较轻,且炎症现象较轻;而B.adolescentis 1组小鼠皮肤角质增厚明显,且炎症现象严重。
以上实验结果表明,相比于青春双歧杆菌B.adolescentis 1,青春双歧杆菌(Bifidobacterium adolescentis)CCFM667更能够抑制银屑病小鼠病变皮肤的角质增厚现象。
实施例5:青春双歧杆菌对银屑病小鼠脾脏增重的抑制作用
将6-8周龄的SPF级BALB/c雌性小鼠分成4组,分别为正常组、模型组和实验组,其中,实验组1灌胃青春双歧杆菌CCFM667(以下简写为CCFM667组),实验组2灌胃青春双歧杆菌B.adolescentis 1(以下简写为B.adolescentis 1组),每组6只,饲养在江南大学实验动物中心,普通饲料喂养,恒定温度21-26℃,湿度40-70%,噪声小于等于60dB,动物照度15-20LX(所有动物实验程序皆由江南大学动物福利与伦理管理委员会进行审查并批准)。
实验周期共计3周,第3周进行造模,造模前一天对小鼠背部进行脱毛处理,面积约为 2.5cm×2.5cm。造模期间每天对模型组和实验组小鼠耳部和背部脱毛区涂抹咪喹莫特乳膏,耳部10mg,背部62.5mg,正常组仅涂抹等量的凡士林。实验期间CCFM667组每天灌胃0.2mL (活菌数为1×109CFU/mL)的CCFM667菌悬液,B.adolescentis 1组每天灌胃0.2mL(活菌数为1×109CFU/mL)B.adolescentis 1菌悬液,正常组和模型组仅灌胃等量的无菌生理盐水作为对照,所有分组均为自由饮水和摄食。于第4周第1天处死小鼠,立即取小鼠脾脏并称重,结果见图3。
由图3可知,小鼠灌胃青春双歧杆菌CCFM667后,脾脏重量减轻21.9%,较模型组显著降低(p<0.001),说明本发明中的菌株,能够抑制脾脏增重;而小鼠灌胃青春双歧杆菌B.adolescentis 1后,脾脏重量仅减轻1.4%,与模型组无显著差异。
以上实验结果表明,青春双歧杆菌(Bifidobacterium adolescentis)CCFM667更能够抑制银屑病小鼠脾脏增重现象。
实施例6:青春双歧杆菌对银屑病小鼠皮肤中IL-22的影响
将6-8周龄的SPF级BALB/c雌性小鼠分成4组,分别为正常组、模型组和实验组,其中,实验组1灌胃青春双歧杆菌CCFM667(以下简写为CCFM667组),实验组2灌胃青春双歧杆菌B.adolescentis 1(以下简写为B.adolescentis 1组),每组6只,饲养在江南大学实验动物中心,普通饲料喂养,恒定温度21-26℃,湿度40-70%,噪声小于等于60dB,动物照度15-20LX(所有动物实验程序皆由江南大学动物福利与伦理管理委员会进行审查并批准)。
实验周期共计3周,第3周进行造模,造模前一天对小鼠背部进行脱毛处理,面积约为 2.5cm×2.5cm。造模期间每天对模型组和实验组小鼠耳部和背部脱毛区涂抹咪喹莫特乳膏,耳部10mg,背部62.5mg,正常组仅涂抹等量的凡士林。实验期间,CCFM667组每天灌胃0.2mL (活菌数为1×109CFU/mL)的CCFM667菌悬液,B.adolescentis 1组每天灌胃0.2mL(活菌数为1×109CFU/mL)B.adolescentis 1菌悬液,正常组和模型组仅灌胃等量的无菌生理盐水作为对照,所有分组均为自由饮水和摄食。于第4周第1天处死小鼠,取小鼠背部脱毛区部分皮肤于-80℃保存,通过ELISA试剂盒检测皮肤中IL-22的含量,结果见图4。
由图4可知,小鼠灌胃青春双歧杆菌CCFM667后,皮肤中IL-22的含量降低了30.2%,较模型组显著降低(p<0.01),说明本发明中的菌株CCFM667能够抑制炎症反应;而小鼠灌胃青春双歧杆菌B.adolescentis 1后,皮肤中IL-22的含量甚至升高了。
以上实验结果表明,青春双歧杆菌(Bifidobacterium adolescentis)CCFM667能显著下调银屑病小鼠中典型上调促炎因子至正常水平,尤其是降低IL-22水平,显著优于另外一株青春双歧杆菌B.adolescentis 1。
实施例7:青春双歧杆菌对银屑病小鼠皮肤中IL-23的影响
将6-8周龄的SPF级BALB/c雌性小鼠分成4组,分别为正常组、模型组和实验组,其中,实验组1灌胃青春双歧杆菌CCFM667(以下简写为CCFM667组),实验组2灌胃青春双歧杆菌B.adolescentis 1(以下简写为B.adolescentis 1组),每组6只,饲养在江南大学实验动物中心,普通饲料喂养,恒定温度21-26℃,湿度40-70%,噪声小于等于60dB,动物照度15-20LX(所有动物实验程序皆由江南大学动物福利与伦理管理委员会进行审查并批准)。
实验周期共计3周,第3周进行造模,造模前一天对小鼠背部进行脱毛处理,面积约为 2.5cm×2.5cm。造模期间每天对模型组和实验组小鼠耳部和背部脱毛区涂抹咪喹莫特乳膏,耳部10mg,背部62.5mg,正常组仅涂抹等量的凡士林。实验期间,CCFM667组每天灌胃0.2mL (活菌数为1×109CFU/mL)的CCFM667菌悬液,B.adolescentis 1组每天灌胃0.2mL(活菌数为1×109CFU/mL)B.adolescentis 1菌悬液,正常组和模型组仅灌胃等量的无菌生理盐水作为对照,所有分组均为自由饮水和摄食。于第4周第1天处死小鼠,取小鼠背部脱毛区部分皮肤于-80℃保存,通过ELISA试剂盒检测皮肤中IL-23的含量,结果见图5。
由图5可知,小鼠灌胃青春双歧杆菌CCFM667后,皮肤中IL-23的含量降低了24.6%,较模型组显著降低(p<0.001),说明本发明中的菌株,能够抑制炎症反应;而小鼠灌胃青春双歧杆菌B.adolescentis 1后,皮肤中IL-23的含量并未降低,与模型组无显著差异。
以上实验结果表明,青春双歧杆菌(Bifidobacterium adolescentis)CCFM667能显著下调银屑病小鼠中典型上调促炎因子至正常水平,尤其是降低IL-23水平,显著优于另外一株青春双歧杆菌B.adolescentis 1。
实施例8:含有青春双歧杆菌CCFM667固体饮料的制备
将保藏于保菌管中青春双歧杆菌(Bifidobacterium adolescentis)CCFM667按照占培养基总质量3%的接种量接种到培养基中,于37℃下培养30h,得到培养液;将培养液离心,得到菌体;将菌体用pH为7.2的磷酸盐缓冲液清洗3次后用海藻糖浓度为100g/L的海藻糖冻干保护剂重悬(冻干保护剂和菌体的质量比为2:1),得到重悬液;将重悬液采用真空冷冻法进行冻干,得到青春双歧杆菌(Bifidobacterium adolescentis)CCFM667菌粉。
将含有109CFU的青春双歧杆菌(Bifidobacterium adolescentis)CCFM667菌粉同麦芽糊精进行混合,CCFM667菌粉和麦芽糊精总质量为1克,得到富含青春双歧杆菌(Bifidobacterium adolescentis)CCFM667的固体饮料。
实施例9:含有青春双歧杆菌CCFM667发酵乳的制备
将原料乳(鲜奶、脱脂乳等)95℃、20min热处理后冷却至37℃,将保藏于保菌管中的青春双歧杆菌(Bifidobacterium adolescentis)CCFM667种子液按照占总体积3%的接种量接种到灭菌后的原料乳中,再在该原料乳中按照占总体积3%的接种量接种可共生的商业发酵剂 (保加利亚乳杆菌、嗜热链球菌等),最后将该原料乳在37℃下混菌发酵至滴定酸度为0.6% (以乳酸菌计),得到富含青春双歧杆菌(Bifidobacterium adolescentis)CCFM667的发酵乳。
实施例10:青春双歧杆菌CCFM667的发酵剂的制备
将保藏于保菌管中的青春双歧杆菌(Bifidobacterium adolescentis)CCFM667种子液按照占培养基总质量2~4%的接种量接种到发酵培养基中,于37℃下培养30h,得到培养液;将培养液离心,得到菌体;将菌体用pH为7.2的磷酸盐缓冲液清洗3次后用冻干保护剂重悬,并控制冻干保护剂和菌体的质量比为2:1,得到重悬液;将重悬液采用真空冷冻法进行冻干,得到青春双歧杆菌(Bifidobacterium adolescentis)CCFM667的发酵剂。
所述发酵培养基包含占培养基总质量87.7%的水、10%的脱脂乳、0.5%的葡萄糖、1.5%的胰蛋白胨以及0.3%的酵母浸膏,发酵培养基pH为6.8。
可选地,发酵培养基中还加入脱脂奶粉和L-谷氨酸钠,脱脂奶粉:麦芽糊精:L-谷氨酸钠=8~10:8~10:1。
虽然本发明已以较佳实施例公开如上,但其并非用以限定本发明,任何熟悉此技术的人,在不脱离本发明的精神和范围内,都可做各种的改动与修饰,因此本发明的保护范围应该以权利要求书所界定的为准。
SEQUENCE LISTING
<110> 江南大学
<120> 一种能够缓解银屑病的青春双歧杆菌及其应用
<130> BAA201539A
<160> 2
<170> PatentIn version 3.3
<210> 1
<211> 1019
<212> DNA
<213> Bifidobacterium adolescentis
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<222> (1055)..(1056)
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<220>
<221> misc_feature
<222> (1061)..(1061)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1068)..(1068)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1071)..(1071)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1075)..(1076)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1082)..(1085)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1088)..(1090)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1094)..(1101)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1103)..(1103)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1109)..(1109)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1111)..(1111)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1114)..(1117)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1122)..(1122)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1124)..(1124)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1127)..(1130)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1133)..(1133)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1136)..(1136)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1138)..(1138)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1140)..(1140)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1142)..(1142)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1147)..(1147)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1150)..(1151)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1155)..(1156)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1158)..(1163)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1167)..(1167)
<223> n is a, c, g, or t
<220>
<221> misc_feature
<222> (1169)..(1172)
<223> n is a, c, g, or t
<400> 2
nnnnnnnnnn nnnnnnnnnn nnnnnntgca gtcgaacggg atcggctgga gcttgctccg 60
gccgtgagag tggcgaacgg nnnnntaatg cgtgaccgac ctgccccata caccggaata 120
gctcctggaa acgggtggta atgccggatg ctccagttgg atgcatgtcc ttctgggaaa 180
gattctatcg gtatgggatg gggtcgcgtc ctatcatctt gatggcgggg taacggccca 240
ccatggcttc gacgggtagc cggcctgaga gggcgaccgg ccacattggg actgagatac 300
ggcccagact cctacgggag gcagcagtgg ggaatattgc acaatgggcg caagcctgat 360
gcagcgacgc cgcgtgcggg atgacggcct tcgggttgta aaccgctttt gactgggagc 420
aagcccttcg gggtgagtgt acctttcgaa taagcaccgg ctaactacgt gccagcagcc 480
gcggtaatac gtagggtgca agcgttatcc ggaattattg ggcgtaaagg gctcgtaggc 540
ggttcgtcgc gtccggtgtg aaagtccatc gcttaacggt ggatccgcgc cgggtacggg 600
cgggcttgag tgcggtaggg gagactggaa ttcccggtgt aacggtggaa tgtgtagata 660
tcgggaagaa caccaatggc gaaggcaggt ctctgggccg tcactgacgc tgaggagcga 720
aagcgtgggg agcgaacagg attagatacc ctggtagtcc acgccgtaaa cggtggatgc 780
tggatgtggg gaccattcca cggnctccgt gtcggagcca acgcgttaag catcccgcct 840
ggggagtacg gccgcaaggc taaaactcaa agaaattgac gggggcccgc acaagcggcg 900
gagcatgcgg attaatncga tgcaacgcga agaancttac ctgggcttga catgttcccg 960
acagccccan agatggcggc ntcccttcgg ggcgtgttca caggnggnng catgnncgtc 1020
gncanctcnt gtcgngagat gtngggntaa gtccnncaac nagcgcancc ntccnncctg 1080
gnnnncannn cgtnnnnnnn ngnacctcnc nggnnnnacc gncnggnnnn aanctngnan 1140
gnagggnggn naatnncnnn nnnaatncnn nn 1172
Claims (8)
1.青春双歧杆菌(Bifidobacterium adolescentis)CCFM667,已于2020年12月7日保藏于广东省微生物菌种保藏中心,保藏编号为GDMCC No:61349。
2.含有权利要求1所述青春双歧杆菌CCFM667的组合物。
3.根据权利要求2所述的组合物,其特征在于,所述组合物为发酵剂;所述发酵剂中青春双歧杆菌的数量≥1×105CFU/g或1×105CFU/mL。
4.权利要求1所述的青春双歧杆菌(Bifidobacterium adolescentis)CCFM667,或权利要求2或3所述的组合物在制备缓解银屑病的产品中的应用。
5.根据权利要求4所述的应用,其特征在于,所述缓解银屑病为:缓解皮肤褶皱、鳞屑和/或红斑症状,或抑制皮肤角质增厚。
6.根据权利要求4所述的应用,其特征在于,所述产品为食品、保健品或药物。
7.一种含有权利要求1所述青春双歧杆菌CCFM667的药物,其特征在于,还含有药物载体和/或药用辅料。
8.含有权利要求1所述的青春双歧杆菌CCFM667的固体饮料。
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