CN116790402A - 一株具有抗炎特性的单形拟杆菌菌株、培养方法及应用 - Google Patents
一株具有抗炎特性的单形拟杆菌菌株、培养方法及应用 Download PDFInfo
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Abstract
本发明属于微生物技术领域,具体涉及一株具有抗炎特性的单形拟杆菌(Bacteroides uniformis)JCM5828、培养方法及应用。所述单形拟杆菌能够恢复DSS诱导的肠道炎症小鼠的结肠长度、提高结肠上皮屏障完整性、降低促炎基因TNF‑α、IL‑6、IL‑1β表达水平、提高抑炎基因IL‑10及紧密连接蛋白基因ZO‑1、Occludin、Claudin‑1的表达水平,具有对肠道炎症的治疗作用,能够抗炎药物、抗炎保健品或者抗炎饲料添加剂等抗炎产品。
Description
技术领域
本发明属于微生物技术领域,具体涉及一株具有抗炎特性的单形拟杆菌(Bacteroides uniformis)JCM5828、培养方法及应用。
背景技术
炎症性肠病包括溃疡性结结肠和克罗恩病,是由多种功能失调的免疫反应介导的慢性复发性炎性肠病,是基因易感宿主中由环境、微生物组和免疫调节因素相互作用的结果而发展的。研究发现,溃疡性结肠炎的时空和地理分布似乎都与社会的工业化和城市化平行,以前认为由于生活方式的影响,其主要发生在西方发达国家,近几十年来,趋势已转向亚洲、非洲和南美的发展中国家和新兴工业化国家。炎症性肠病患者常伴有肠道微生物区系的失调,传统药物虽然可以抑制病程的发展,但长期使用也会导致诸多如耐药性等的副作用。因此,安全无副作用的新型肠道炎症治疗手段亟待开发。
益生菌是一种活的微生物,当给予足够的量时,会对宿主产生有益的影响。它们通过调节肠道微生物区系,促进粘膜屏障功能和对病原体的抵抗力来发挥这些作用。目前,临床上认为益生菌能够维持或缓解炎症性肠病的临床发展。益生菌的作用机制主要通过4种方式实现:抑制病原菌或与其竞争、增强肠道上皮的屏障功能、调节宿主免疫功能、参与肠-脑轴调节。
拟杆菌作为革兰氏阴性、无芽孢、专性厌氧的小杆菌,正常寄居于人和动物的肠道、口腔、上呼吸道和生殖道。含有大量编码碳水化合物活性酶的基因,且能够根据需要进行稳定的转换,降解或发酵消化道难以消化的膳食纤维,产生大量的如乙酸、丙酸等短链脂肪酸及葡聚糖等代谢产物,从而帮助宿主分解多糖提高营养利用率、加快肠粘膜的血管形成以及免疫系统发育以提高宿主的免疫力并维持肠道微生态平衡。智发朝等(Fan,H.etal.Bacteroides fragilis strain ZY-312 defense against Cronobacter sakazakii-induced necrotizing enterocolitis in vitro and in a neonatal ratmodel.Msystems 4,e00305-00319(2019))研究发现了一株能够治疗肠道炎症的脆弱拟杆菌并通过毒力实验证明了其安全性。此外,刘洋洋等人(刘洋洋,郑丽君,常秀娟,梁德宝&林渝清.解纤维素拟杆菌在预防和/或治疗炎症性肠病中的应用.CN113521109A.)从人类粪便中分离出一株具有益生特性的解纤维素拟杆菌并通过小鼠克罗恩病模型及大鼠溃疡性结肠炎模型充分证明了该菌在治疗炎症性肠病方面效果显著。任志鸿等(任志鸿et al.普通拟杆菌菌株及在制备炎症性肠病治疗药物中的应用.CN111269852A)也从人类粪便中分离纯化得到一株普通拟杆菌并通过DSS诱导的小鼠溃疡性结肠炎模型验证了其益生效果。为了探究其他具有治疗肠道炎症潜力的拟杆菌菌株,本发明提供了一株具有益生特性的单形拟杆菌菌株,该菌株在治疗炎症方面具有显著的效果。
发明内容
为了解决上述技术问题,本发明提供了一株具有抗炎特性的单形拟杆菌菌株、培养方法及应用。
本发明的目的是提供一种具有抗炎特性的单形拟杆菌菌株,命名为JCM5828,该菌株已于2022年8月3日保藏于中国典型培养物保藏中心,保藏编号为CCTCC NO:M 20221218。
本发明还提供了一种上述具有抗炎特性的单形拟杆菌菌株的培养方法,将单个菌落接种于HBI培养基中,37℃好氧培养24h,得到单形拟杆菌菌液。
本发明还提供了一种包含上述具有抗炎特性的单形拟杆菌菌株的抗炎产品。
优选的,所述抗炎产品为抗炎药物、抗炎保健品或者抗炎饲料添加剂。
优选的,所述抗炎产品为片剂、散剂、粉剂、颗粒剂、胶囊剂、液体制剂中的任意一种。
优选的,所述抗炎产品是将所述单形拟杆菌以活菌或死菌的固态或液态菌制剂的形式制备成的。
优选的,如果是液态抗炎产品,则所述抗炎产品中耐久肠球菌含量≥109cfu/mL;如果是固态抗炎产品,则所述抗炎产品中耐久肠球菌含量≥109cfu/g。
本发明还提供了一种所述的具有抗炎特性的单形拟杆菌菌株的应用,所述单形拟杆菌菌株用于制备治疗溃疡性结肠炎症的产品。
优选的,所述单形拟杆菌菌株用于制备促炎基因表达抑制剂,或者用于制备抑炎基因及紧密连接蛋白基因表达促进剂,或者用于制备血清中IFN-γ的浓度调节剂。
优选的,所述促炎基因为TNF-α、IL-6和IL-1β,所述抑炎基因为IL-10,所述紧密连接蛋白基因为ZO-1、Occludin和Claudin-1。
与现有技术相比,本发明具有以下有益效果:
本发明所述单形拟杆菌JCM5828可使用于动物或是人类。所述单形拟杆菌还可配合所属领域中的常规用料组分;例如,对于药物组合物,可包括适量的辅料,所述辅料可以为赋型剂、稀释剂、填充剂、吸收促进剂等;对于食品组合物,本发明的单形拟杆菌可以按照现有技术中含单形拟杆菌的食品进行生产,所述组合物可根据受施予者的需要,而采用不同形态。例如粉剂、锭剂、造粒、微胶囊、液体制剂等。
本发明发掘了单形拟杆菌新的用途,开拓了一个新的应用领域。本发明通过实验证明,单形拟杆菌安全无毒,药理作用强,对于肠道炎症有很好的治疗作用,从而预示了单形拟杆菌具有很好的食用和药用前景。单形拟杆菌作为一种益生菌,可用于制备治疗炎症性肠病的食品或药物组合物,进而为临床提供适合人体服用的保健食品或治疗药物。
根据本发明的具体实施方案,所述组合物是用于下调促炎基因IL-6和/或TNF-α和/或IL-1β的表达,上调抑炎基因IL-10及紧密连接蛋白基因ZO-1、Occludin和Claudin-1的表达。具体应用时,所述单形拟杆菌的应用量应达到5×109CFU/mL,以起到缓解和治疗肠道炎症的作用,单形拟杆菌肠JCM5828还可治疗出血性大肠杆菌诱导的羔羊腹泻。
生物保藏信息说明
一种单形拟杆菌(Bacteroides uniformis),命名为BacteroidesuniformisJCM5828,简称为JCM5828。该菌株已于2022年8月3日保藏于中国典型培养物保藏中心CCTCC(地址:湖北省武汉市武昌区八一路珞珈山,武汉大学),分类命名:单形拟杆菌(Bacteroides uniformis);保藏编号为CCTCC NO:M 20221218。
附图说明
图1是单形拟杆菌JCM5828的平板培养图;
图2是本发明实施例2中单形拟杆菌对DSS诱导的肠道炎症小鼠体重的影响;
图3是本发明实施例2中单形拟杆菌对DSS诱导的肠道炎症小鼠结肠长度的影响;A为长度测量统计图,B为结肠实物长度测量;
图4是本发明实施例2中单形拟杆菌对DSS诱导的肠道炎症小鼠结肠杯状细胞数的影响;A为小鼠结肠上皮中杯状细胞数量统计结果,B为小鼠结肠上皮中杯状细胞染色结果;
图5是本发明实施例2中单形拟杆菌对DSS诱导的肠道炎症小鼠结肠组织基因表达量的影响;A-G分别为IL-10、IL-6、IL-1β、TNF-α、Occludin、ZO-1、Claudin-1;
图6是实施例3中单形拟杆菌对大肠杆菌诱导的肠道炎症小鼠结肠组织基因表达量的影响;A-F分别为IL-6、IL-1β、TNF-α、Occludin、ZO-1、Claudin-1;
图7是实施例4单形拟杆菌在治疗大肠杆菌诱导的羔羊腹泻方面相关基因表达量的影响;A-F分别为体重、DAI Score、ADFI(干物质采食量)、血清因子(TNF-α、IL-1β、IFN-γ)、结肠组织切片HE染色结果、Histology score。
具体实施方式
为了使本领域技术人员更好地理解本发明的技术方案能予以实施,下面结合具体实施例和附图对本发明作进一步说明。
在本发明的描述中,如未特殊说明,所用试剂均为市售,所用方法均为本领域常规技术。
实施例1单形拟杆菌JCM5828菌液的制备
(1)由羔羊粪便中分离单形拟杆菌JCM5828
收集新鲜的羔羊粪便1g悬浮于PBS缓冲液中,充分混合,连续稀释至10-8倍。根据拟杆菌种利用碳源的差异,设计以木聚糖(xylan)为唯一碳源的培养基,配方如下(g/L):蛋白胨20g、酵母提取物5g、氯化钠5g、磷酸氢二钾0.05g、磷酸二氢钾0.05g、半胱氨酸盐酸盐1g、溴甲酚紫0.012g、琼脂20g,并添加5g单一碳源木聚糖,均匀溶于水后调节pH至7.0。高压蒸汽灭菌后,待降温至50℃时,加入0.01‰氯化血红素(即氯化血红素终浓度0.01‰,w/v)、0.01‰维生素K1(即维生素K1终浓度0.01‰,v/v)、0.1‰卡那霉素(即卡那霉素终浓度0.1‰,v/v)、0.0075‰万古霉素(即万古霉素终浓度0.0075‰,v/v)配置成单一碳源固体培养基。将40μL粪便稀释液涂板至固体培养基上,37℃厌氧培养48h后挑取单菌落进行菌种鉴定并纯化培养,得到目标菌株。
单形拟杆菌JCM5828平板培养结果参见图1。
(2)单形拟杆菌JCM 5828全基因组测序;
采用农业农村部印发的《直接饲喂微生物和发酵制品生产菌株鉴定及其安全性评价指南》方法,对单形拟杆菌JCM 5828基因组中抗生素耐药基因按照覆盖度≥70%,匹配度≥80%进行筛选。评价结果显示,单行拟杆菌JCM 5828仅对头孢霉素Cephalosporin敏感。符合欧洲食品安全委员会(European Food Safety Authority)对食用细菌耐药性评价规范中的要求。单行拟杆菌JCM 5828不含外源抗生素耐药基因,食用安全。
单形拟杆菌16s rRNA基因序列测序结果如下:
GGTTTACCTAGGGCGCTCCTTGCGGTTACGCACTTCAGGTACCCCCGGCTTTCATGGCTTGACGGGCGGTGTGTACAAGGCCCGGGAACGTATTCACCGCGCCGTGGCTGATGCGCGATTACTAGCGAATCCAGCTTCATGGAGTCGGGTTGCAGACTCCAATCCGAACTGAGAGAGGCTTTCGGGATTAGCATCACGTCGCCGTGTAGCTGCCTTCTGTACCCCCCATTGTAACACGTGTGTAGCCCCGGACGTAAGGGCCGTGCTGATTTGACGTCATCCCCACCTTCCTCACATCTTACGACGGCAGTCTCGACAGAGTCCCCAGCATCACCTGATGGTAACTATCGATAAGGGTTGCGCTCGTTATGGCACTTAAGCCGACACCTCACGGCACGAGCTGACGACAACCATGCAGCACCTTCACAACTGCCTTGCGGCTGACATGTCTCCACATCATTCAGTTGCAATTCAAGCCCGGGTAAGGTTCCTCGCGTATCATCGAATTAAACCACATGTTCCTCCGCTTGTGCGGGCCCCCGTCAATTCCTTTGAGTTTCACCGTTGCCGGCGTACTCCCCAGGTGGAATACTTAACGCTTTCGCTTGGCCGCTTACTGTATATCGCAAACAGCGAGTATTCATCGTTTACTGTGTGGACTACCAGGGTATCTAATCCTGTTTGATACCCACACTTTCGAGCATCAGCGTCAGTTACAGTCCAGCAGGCTGCCTTCGCAATCGGAGTTCTTCGTGATATCTAAGCATTTCACCGCTACACCACGAATTCCGCCTGCCTCTACTGTACTCAAGACACCCAGTATCAACTGCAATTTTACGGTTGAGCCGCAAACTTTCACAACTGACTTAAGCGTCCGCCTACGCTCCCTTTAAACCCAATAAATCCGGATAACGCTCGGATCCTCCGTATTACCGCGGCTGCTGGCACGGAGTTAGCCGATCCTTATTCATACGGTACATACAAAAAGGCACACGTGCCTCACTTTATTCCCGTATAAAAGAAGTTTACAACCCATAGGGCAGTCATCCTTCACGCTACTTGGCTGGTTCAGACTCTCGTCCATTGACCAATATTCCTCACTGCTGCCTCCCGTAGGAGTTTGGACCGTGTCTCAGTTCCAATGTGGGGGACCTTCCTCTCAGAACCCCTATCCATCGAAGGCTTGGTGGGCCGTTACCCCGCCAACAACCTAATGGAACGCATCCCCATCGATGACCGAAATTCTTTAATAGTTCTACCATGCGGAAGAACTATGCCATCGGGTATTAATCTTTCTTTCGAAAGGCTATCCCCGAGTCATCGGCAGGTTGGATACGTGTTACTCACACCGTGCGCCGGTCGCCATCAAACTTAGCAAGCTAAGTGGGAAGCATATTCT
(3)单形拟杆菌JCM5828的富集培养及菌液制备
选取纯化好的单个菌落接种于脑心浸液(HBI)培养基中进行富集培养(37℃厌氧培养24h),并取培养后的菌液在5000r/min、4℃条件下离心10min,弃去上清,并用生理盐水洗涤、重悬后进行梯度稀释,以调整单形拟杆菌JCM5828的浓度,保存备用。
实施例2单形拟杆菌JCM5828对于炎症性肠病的短期治疗作用
采用实施例1制备的单形拟杆菌JCM5828菌液进行以下实验:
实验动物:C57BL/6J雌性小鼠。
动物模型构建:化学药物诱导炎症性肠病(葡聚糖硫酸钠DSS诱导溃疡性结肠炎)。
动物试验设计:取24只小鼠随机分为3组:阴性对照组(NC)、阳性对照组(Con)、单形拟杆菌处理组(B.u)。试验第0-14d,NC小鼠自由饮水,Con和B.u组小鼠自由饮用含有3%DSS的饮用水。试验15-24d,NC小鼠自由饮水,Con和B.u组小鼠仍自由饮用含3g/100mL DSS的饮用水,此外,NC和Con组小鼠每日灌胃200μL生理盐水,B.u组小鼠每日灌胃200μL含5×109CFU/mL Bacteroides uniformis JCM5828的生理盐水,于第24d处死小鼠并采样。
测量指标:小鼠体重、小鼠结肠长度、结肠组织切片AB-PAS染色、结肠组织杯状细胞数、促炎基因(TNF-α、IL-6、IL-1β)、抑炎基因IL-10及紧密连接蛋白基因(ZO-1、Occludin、Claudin-1)表达量。
试验结果:如图2所示,与NC组相比,DSS处理后Con组小鼠的体重显著下降,B.u组小鼠体重显著上升(P<0.05),结果显示,单形拟杆菌JCM5828能够防止DSS导致的小鼠体重降低。如图3所示,NC组结肠长度最长,其次为B.u组,最后为Con组,结果显示,单形拟杆菌JCM5828处理能够显著缓解DSS影响下的结肠长度变短(P<0.05)。如图4所示,与Con组相比,B.u组小鼠结肠上皮中杯状细胞数量显著上升(P<0.05),说明单形拟杆菌JCM5828处理能够显著改善DSS处理下小鼠的肠道上皮屏障完整性。如图5所示,与Con组相比,B.u组小鼠结肠组织中促炎基因TNF-α、IL-6、IL-1β的表达水平显著降低(P<0.05),且抑炎基因IL-10的表达水平显著升高(P<0.05)。此外,B.u组小鼠结肠上皮组织中紧密连接蛋白基因ZO-1、Occludin、Claudin-1的表达量显著高于Con组小鼠(P<0.05)。
实施例2的实验结果说明单形拟杆菌JCM5828炎症性肠病尤其是溃疡性结肠炎有治疗作用。
实施例3单形拟杆菌JCM5828抑制肠道致病菌的作用
采用实施例1制备的单形拟杆菌JCM5828菌液进行以下实验:
(1)抑菌实验
致病菌种类:金黄色葡萄球菌、大肠杆菌、枯草芽孢杆菌、幽门螺杆菌、沙门氏菌。
实验方法:牛津杯法,将孵育18h的致病菌菌液0.2ml、菌体浓度107CFU/mL分别均匀涂布接种于营养琼脂平板上,平板中心放置牛津杯,每个牛津杯中装有0.2ml实施例1制备的单形拟杆菌JCM5828菌液;用无菌水0.2ml作为阴性对照。上述体系在37℃培养24h,测量抑菌圈直径,测量3次,求取平均值。
实验结果:结果参见表1。
表1羔羊腹泻指数评分标准
(2)动物实验
实验动物:6周龄C57BL/6J雌性小鼠。
动物模型构建:大肠杆菌O157:H7诱导肠道炎症的模型参考(Wang,G.,Tang,H.,Zhang,Y.,Xiao,X.,Xia,Y.,&Ai,L.(2020).The intervention effects ofLactobacillus casei LC2W on Escherichia coli O157:H7-induced mousecolitis.Food Science and Human Wellness,9(3),289-294.)。
动物试验设计:取24只小鼠随机分为3组:阴性对照组(NC)、阳性对照组(Con)、单形拟杆菌JCM5828处理组(B.u)。试验第0-3d,所有实验小鼠饮用含有5g/L链霉素的饮水,以抑制肠道中微生物,为植入大肠杆菌O157:H7做准备。第4-13d,NC小鼠每天灌胃生理盐水0.6mL;Con组小鼠每日灌胃0.3mL大肠杆菌O157活菌浓度含量为1×109CFU/mL的生理盐水,同时灌胃0.3mL的生理盐水;B.u组小鼠灌胃0.3mL大肠杆菌O157活菌浓度为2×109CFU/mL的生理盐水,同时灌胃单形拟杆菌JCM5828活菌含量为2×109CFU/mL的生理盐水0.3mL;于第14天处死小鼠并采样。
测量指标:促炎基因(TNF-α、IL-6、IL-1β)、屏障蛋白基因ZO-1、Occludin、Claudin-1的表达量。
试验结果:如图6所示,与Con组相比,B.u组小鼠结肠组织中促炎基因TNF-α、IL-6、IL-1β的表达水平显著降低(P<0.05)。此外,B.u组小鼠结肠上皮组织中紧密连接蛋白基因ZO-1、Occludin、Claudin-1的表达量显著高于Con组小鼠(P<0.05)。
实施例3的实验结果说明单形拟杆菌JCM5828炎症性肠病尤其是溃疡性结肠炎有治疗作用。
实施例4单形拟杆菌JCM5828在治疗大肠杆菌诱导的羔羊腹泻方面的效果实验。
实验分组:取24只60d健康湖羊随机分为3组,阴性对照组(NC)、阳性对照组(Con)、单形拟杆菌处理组(B.u),试验共分为两阶段。试验第一阶段:阴性对照组(NC)处理对象为健康羔羊,每日晨饲前灌胃5mL生理盐水;阳性对照组(Con)及单形拟杆菌处理组(B.u)羔羊每日晨饲前灌胃5mL含1×1012CFU/mL出血性大肠杆菌(E.coil O157)的生理盐水,试验第一阶段持续8d。试验第二阶段:NC组和Con组羔羊于每日晨饲前灌胃5mL生理盐水;B.u组羔羊每日晨饲前灌胃5mL含1×1012CFU/mL Bacteroides uniformis JCM5828的生理盐水,试验第二阶段持续16d,于第25d处死羔羊并采样。
测量指标:羔羊体重、腹泻评分、结肠组织切片HE染色,血清中TNF-α、IL-6、IL-1β、IFN-γ、LPS的浓度。
羔羊腹泻评分标准:腹泻指数评分标准:以滩羊粪便形态、肛门周围皮肤洁净程度及炎症情况为评价指标,按照表3分为0、1、2、3等级将羔羊腹泻进行量化。
表2羔羊腹泻指数评分标准
试验结果:如图7所示,与NC组相比,E.coil O157处理后Con组羔羊的体重显著下降,而经B.u处理后羔羊体重显著上升(P<0.05),结果显示,单形拟杆菌JCM5828能够防止致病菌引起的羔羊体重降低。结肠组织切片HE染色结果显示,与Con组相比,B.u组小鼠结肠上皮中炎症因子浸润和上皮损伤显著降低(P<0.05),说明单形拟杆菌JCM5828处理能够显著改善DSS处理下小鼠的肠道上皮屏障完整性。如图7所示,与Con组相比,B.u组小鼠血清中TNF-α、IL-1β、IFN-γ的浓度显著降低(P<0.05)。
已有研究结果显示TNF-α、IL-6、IL-1β、IFN-γ及LPS等与糖尿病、肠道炎症、静脉血栓等疾病相关。结合实施例2、实施例3及实施例4,本发明首次发现,单形拟杆菌JCM5828不但能够影响组织中TNF-α、IL-6、IL-1β等促炎因子基因的表达量,也能够调控血清中TNF-α、IL-6、IL-1β及LPS的浓度。同时,化学腹泻及生物腹泻模型的共同验证也表明耐久肠球菌在治疗肠道炎症方面具有广泛的应用前景。
需要说明的是,本发明中涉及数值范围时,应理解为每个数值范围的两个端点以及两个端点之间任何一个数值均可选用,由于采用的步骤方法与实施例相同,为了防止赘述,本发明描述了优选的实施例。尽管已描述了本发明的优选实施例,但本领域内的技术人员一旦得知了基本创造性概念,则可对这些实施例做出另外的变更和修改。所以,所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。
Claims (10)
1.一株具有抗炎特性的单形拟杆菌(Bacteroides uniformis)菌株,其特征在于,命名为JCM5828,该菌株已于2022年8月3日保藏于中国典型培养物保藏中心,保藏编号为CCTCCNO:M 20221218。
2.根据权利要求1所述的具有抗炎特性的单形拟杆菌菌株的培养方法,其特征在于,将单个菌落接种于HBI培养基中,37℃好氧培养24h,得到单形拟杆菌菌液。
3.一种包含权利要求2所述的具有抗炎特性的单形拟杆菌菌株的抗炎产品。
4.根据权利要求3所述的具有抗炎特性的单形拟杆菌菌株的抗炎产品,其特征在于,所述抗炎产品为抗炎药物、抗炎保健品或者抗炎饲料添加剂。
5.根据权利要求3所述的具有抗炎特性的单形拟杆菌菌株的抗炎产品,其特征在于,所述抗炎产品为片剂、散剂、粉剂、颗粒剂、胶囊剂、液体制剂中的任意一种。
6.根据权利要求3所述的具有抗炎特性的单形拟杆菌菌株的抗炎产品,其特征在于,所述抗炎产品是将所述单形拟杆菌以活菌或死菌的固态或液态菌制剂的形式制备成的。
7.根据权利要求3所述的具有抗炎特性的单形拟杆菌菌株的抗炎产品,其特征在于,如果是液态抗炎产品,则所述抗炎产品中耐久肠球菌含量≥109cfu/mL;如果是固态抗炎产品,则所述抗炎产品中耐久肠球菌含量≥109cfu/g。
8.根据权利要求1所述的具有抗炎特性的单形拟杆菌菌株的应用,其特征在于,所述单形拟杆菌菌株用于制备治疗溃疡性结肠炎症的产品。
9.根据权利要求8所述的具有抗炎特性的单形拟杆菌菌株的应用,其特征在于,所述单形拟杆菌菌株用于制备促炎基因表达抑制剂,或者用于制备抑炎基因及紧密连接蛋白基因表达促进剂,或者用于制备血清中IFN-γ的浓度调节剂。
10.根据权利要求9所述的具有抗炎特性的单形拟杆菌菌株的应用,其特征在于,所述促炎基因为TNF-α、IL-6和IL-1β,所述抑炎基因为IL-10,所述紧密连接蛋白基因为ZO-1、Occludin和Claudin-1。
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