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Glycyrrhizic acid promotes M1 macrophage polarization in murine bone marrow-derived macrophages associated with the activation of JNK and NF-κB

Glycyrrhizic acid promotes M1 macrophage polarization in mur...

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中国畜牧兽医学会动物微生态学分会第五届第十二次全国学术研讨会

作者： Yulong Mao Baikui Wang Xin Xu Wei Du Weifen Li Youming Wang Key Laboratory of Animal Molecular Nutrition of Education of Ministry College of Animal ScienceZhejiang University

The roots and rhizomes of Glycyrrhiza species(licorice) have been widely used as natural sweeteners and herbal *** aim of this study is to investigate the effect of glycyrrhizic acid(GA) from licorice on macrophage *** phenotypic and functional activities of murine bone marrow-derived macrophages(BMDMs) treated by GA were assessed with flow cytometry,real-time fluorescence PCR,cytochemistry assay,western blotting and enzyme linked immunosorbent *** results showed that GA obviously increased the cell surface expression of CD80,CD86 and MHCH ***,GA upregulated the expression of CCR7 and the production of TNF-α,IL-12,IL-6,and NO(the markers of classically activated(M1) macrophages),whereas it downregulated the expression of MR,Ym1,and Arg1(the markers of alternatively activated(M2) macrophage).The functional tests showed that GA dramatically enhanced the uptake of FITC-dextran and *** K88 by BMDMs and markedly decreased the intracellular survival of *** K88 and ***,we demonstrated that JNK and NF-κB activation are required for GA-induced NO and M1-related cytokines production,while ERK1/2 pathway exhibits a regulatory effect via induction of ***,these findings indicated that GA promoted polarization of M1 macrophages and enhanced its phagocytosis and bactericidal *** results expanded our knowledge about the role of GA in macrophage polarization.

关键词： Glycyrrhizic acid promotes M1 macrophage polarization in murine bone marrow-derived macrophages associated with the activation of JNK and NF JNK

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藏猪源解淀粉芽孢杆菌的益生性、安全性和应用性研究

藏猪源解淀粉芽孢杆菌的益生性、安全性和应用性研究

引用

中国畜牧兽医学会动物微生态学分会第五届第十二次全国学术研讨会

作者：郭政宏周彪严亨秀西南民族大学生命科学与技术学院

解淀粉芽孢杆菌(Bacillus amyloliquefaciens)是一种在形态、生理生化和培养特征等方面与枯草芽孢杆菌(Bacillus subtilis)非常相似的芽孢杆菌,其在生长繁殖过程中能够产生许多淀粉酶、蛋白酶和抑菌物等代谢产物。2007年,解淀粉芽孢杆菌... 详细信息

解淀粉芽孢杆菌(Bacillus amyloliquefaciens)是一种在形态、生理生化和培养特征等方面与枯草芽孢杆菌(Bacillus subtilis)非常相似的芽孢杆菌,其在生长繁殖过程中能够产生许多淀粉酶、蛋白酶和抑菌物等代谢产物。2007年,解淀粉芽孢杆菌FZB42全基因组序列的测定使人类对这种芽孢杆菌有了更多的了解,同时也促进了解淀粉芽孢杆菌在多方面的研究应用;如在动物饲养研究中,Gonzalez-Ortiz等用解淀粉芽孢杆菌CECT5940和屎肠球菌CECT4515复合制剂饲喂成年狗,促进了营养物消化吸收、降低了粪便中致病菌的含量;在环境保护研究中,高大响等从健康鸡粪便中分离到了1株具有除臭作用的解淀粉芽孢杆菌,李超等从滇池富营养化水中分离筛选得到了1株对鱼腥藻生长具有抑制效果的解淀粉芽孢杆菌DC1等。黄曲霉毒素(aflation,AFT)是由黄曲霉等真菌产生的次级代谢产物,其具有抑制免疫、致癌的作用,威胁着畜牧业及饲料工业,其中影响最大、分布最广的就是黄曲霉毒素B1(AFB1),目前,利用微生物对AFB1进行生物降解,具有特异性强、效率高等优点。动物体外肠道模型与动物机体胃肠道环境有一定的差异,1株潜在的益生菌能否在动物体内产生益生作用,终须进行动物试验等应用性研究。此次试验主要探讨解淀粉芽孢杆菌SWUN-TP23对动物生长性能的影响、对动物的安全性及添加到饲料中对黄曲霉毒素B1的降解能力,以为解淀粉芽孢杆菌SWUN-TP23应用于畜牧生产中提供一定的参考依据。探讨了1株来自藏猪粪便中具有一定体外益生潜力的解淀粉芽孢杆菌SWUN-TP23在动物体内的益生性、安全性及添加到饲料中的应用性。结果显示,按10～8 cfu/ml饲喂小鼠对其生长性能影响最大,可促进小鼠胸腺和脾脏发育,使日均增重较对照组提高2倍左右,在肉眼和光学显微镜下观察小鼠心、肝、脾、肺、肾等内脏均未发现明显的病理变化;添加于发酵饲料中,可降解一定量的黄曲霉毒素B1。试验证明,该菌株能提高小鼠生长性能,增强小鼠的免疫力,安全无毒,且添加到发酵饲料中还能在一定程度上降低饲料中黄曲霉毒素B1的含量,具有一定的应用价值。

关键词：藏猪解淀粉芽孢杆菌益生性安全性黄曲霉毒素B1

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复合微生态制剂对肉鸡生产性能、消化酶活性及免疫功能的影响

复合微生态制剂对肉鸡生产性能、消化酶活性及免疫功能的影响

引用

中国畜牧兽医学会动物微生态学分会第五届第十二次全国学术研讨会

作者：郑文才徐静杨革玲广州广牧丰生物技术有限公司

在肉鸡养殖过程中,由细菌或病毒引起的疾病(如大肠杆菌病、鸡白痢等)是始终困扰养殖户的难题。肉鸡肠道健康、肠道微生物平衡是解决该问题的关键。禽类肠道菌的组成和结构具有其明显的特点,刚出壳的雏鸡,肠道内无菌;7日龄时,小肠部位的... 详细信息

在肉鸡养殖过程中,由细菌或病毒引起的疾病(如大肠杆菌病、鸡白痢等)是始终困扰养殖户的难题。肉鸡肠道健康、肠道微生物平衡是解决该问题的关键。禽类肠道菌的组成和结构具有其明显的特点,刚出壳的雏鸡,肠道内无菌;7日龄时,小肠部位的菌群基本形成,25日龄时盲肠菌群才能建立。正常菌群在雏鸡消化道完成定植过程需要30天左右。肠道菌群尚不完善的雏鸡肠黏膜生物屏障不完整,易被病原菌(大肠杆菌、产气荚膜梭菌等)、寄生虫(球虫等)感染,诱发坏死性肠炎等疾病。添加外源益生菌能够维持肠道微生态平衡、促进机体免疫功能、提高饲料转化率、促进营养物质的吸收,从而防治家禽疾病的发生,提高家禽生产性能。此外,酸化剂降低饲料的PH值及酸结合力、提高动物肠道内消化酶的分泌、增殖有益菌、抑制有害菌、降低肠道PH、提高动物抗应激和免疫力等方面具有重要作用。益生菌和有机酸联合使用在肉鸡上的应用效果研究较少。本试验通过在肉鸡的饲养过程中使用益生菌和有机酸按一定比例组成的复合微生态制剂——牧喜多,探讨该产品对肉鸡生产性能、肠道消化酶活性及免疫性能的影响,为其在肉鸡中推广应用提供一定的依据。本试验旨在探讨复合微生态制剂对肉鸡生产性能、消化酶活性和免疫功能的影响。试验选用600只10日龄AA肉公鸡随机分为2个组,分别饲喂基础饲粮(对照组)和在基础饲粮中添加1000mg/kg复合微生态制剂的试验饲粮(试验组),每组6个重复,每个重复50只鸡。预饲期4天,正试期28天。结果表明:与对照组相比,饲粮中添加复合微生态制剂1)显著提高肉鸡体重(P<0.05)、体增重(P<0.05),降低肉鸡料肉比(P<0.05);2)显著提高肉鸡十二指肠食糜及胰脏胰蛋白酶活性(P<0.05)、28日龄肉鸡十二指肠淀粉酶活性(P<0.05)、42日龄肉鸡胰脏脂肪酶活性(P<0.05);3)显著提高28、42日龄肉鸡胸腺指数(P<0.05)及法氏囊指数(P<0.05);4)显著提高28日龄肉鸡血清IgG含量(P<0.05)、新城疫抗体效价(P<0.05)及42日龄肉鸡盲肠SIgA含量(P<0.05)、血清IgG含量(P<0.05)。结果提示:在肉鸡养殖过程中使用复合微生态制剂牧喜多能够提高肉鸡的生产性能、增强其消化能力及免疫功能。

关键词：复合微生态制剂肉鸡生产性能消化酶活性免疫功能

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一株泰山枯草芽孢杆对黄曲霉毒素B1的降解研究

一株泰山枯草芽孢杆对黄曲霉毒素B1的降解研究

引用

中国畜牧兽医学会动物微生态学分会第五届第十二次全国学术研讨会

作者：孙玲玉马连营蔡玉梅柴同杰山东农业大学动物医学院

黄曲霉毒素(Aflatxoin,AFT)是由黄曲霉(As-pergillus flavus)、寄生曲霉(Aspergillus parasiti-cus))等多种真菌产生的次级代谢产物,其中分布范围最广、化学性质最为稳定的为黄曲霉毒素B 1(Afalatoxin B1,AFB1)。目前,利用微生物及其代... 详细信息

黄曲霉毒素(Aflatxoin,AFT)是由黄曲霉(As-pergillus flavus)、寄生曲霉(Aspergillus parasiti-cus))等多种真菌产生的次级代谢产物,其中分布范围最广、化学性质最为稳定的为黄曲霉毒素B 1(Afalatoxin B1,AFB1)。目前,利用微生物及其代谢产物对黄曲霉毒素进行生物解毒,具备效果稳定、特异性强及效率高等优势而成为研究的热点。在微生物降解黄曲霉毒素方面,已经研究了有不同的微生物,细菌如红色棒状杆菌(Mann and Rehm,1977;Wu et al.,2009),荧光假单胞菌,败血假单胞菌,葡萄球菌(Oluwaffemi et al.,2016),真菌如假蜜环菌(Liu et al.,2001),平谷菌(Yehia,2014)。使用安全、特异性强、降解效率高,是解决黄曲霉毒素污染的首要任务。泰山属暖温带季风气候,地表植物种类繁多,土壤主要由棕壤组成,富含矿物质和有机质成分,非常适合微生物包括枯草芽孢杆菌的生长。为此,本试验首次从泰山土壤中分离对AFB1具有高降解作用的枯草芽孢杆菌,并对其降解过程进行了初步研究,为AFB1的生物性降解和霉变饲料控制方面的应用研究奠定基础。枯草芽孢杆菌是对人,家畜是有益的土壤居住菌。该菌能分泌的代谢物中含有大量的活性物质。由于该细菌代谢物对黄曲霉毒素的效果研究未见报道,利用生物方法降解黄曲霉毒素也受到了广泛的关注。因此,本实验从土壤中分离了枯草芽孢杆菌,并进行了鉴定。经16sRNA基因测序鉴定为枯草芽孢杆菌,最终确定1株具有较高降解作用的枯草芽孢杆菌。并利用该菌株的代谢物对AFB1进行了降解率、代谢物活性组分、性质的确定及降解饲料中AFB1效果的研究。结果表明,泰山枯草芽孢杆菌代谢物对AFB1的降解率达90.28%,其中,泰山枯草芽孢杆菌发酵后的上清液对AFB1的降解活性最高,确定发酵后的上清液中存在解毒活性组分;对解毒活性物质进行加热和蛋白酶K变性处理后,解毒活性显著降低,表明起解毒作用的活性物质是其分泌的一种胞外酶;应用性试验也证明了该菌的代谢产物对对霉变饲料中黄曲霉毒素的降解作用。总之,此次枯草芽孢杆菌代谢物对黄曲霉毒素B1的有效降解,显示了枯草芽孢杆菌在饲料和饲料行业中应用潜力。

关键词：枯草芽孢杆菌分离鉴定 AFB1

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Gut microbiota of giant panda

Gut microbiota of giant panda

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中国畜牧兽医学会动物微生态学分会第五届第十二次全国学术研讨会

作者： Wei Guo Sudhanshu Mishra jingsi Tang Bo Zeng Ruihong Ning Ying Li Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province Sichuan Agricultural University

The giant panda(Ailuropoda melanoleuca) is a highly vulnerable mammal(The IUCN Red List of Threatened Species,2016),whilst being the most iconic and flagship species for wildlife conservation *** giant panda,a member of family Ursidae and possessing a typical carnivore like short gastrointestinal tract,is an enigmatic species because it consumes nearly 12.5 kg of highly fibrous bamboo leaves and stems each day,and it became full-time bamboo eating species by the late Pliocene(2 Mya).Along with the threat of climate change,this bamboo specialist is at risk to extinction because of its sole reliance on large quantities of low-nutrition and low-energy content food from *** profound investigation of Panda's genome has reported that it encodes all enzymes crucial for a carnivorous digestive system but lacks those required for digesting cellulose rich bamboo *** the excellent studies on Tas1r1pseudogenization(umami taste receptor gene) and appetite-reward system in the panda's genome to understand the evolutionary consequences of dietary switch of the panda,there is still uncertainty about the underlying mechanisms and one question still remains unanswered;"why pandas shifted to bamboo diet?" Under such circumstances,it was believed that the giant panda is dependent on gut microbiota in order to adapt to highly fibrous bamboo ***,gastrointestinal disease is reported to be a primary cause of death in both wild and ***,it becomes most significant to understand,how gut microbiota impacts panda's health and nutrition,and biology behind this *** metagenomic study found the Clostridium bacteria in giant panda gut contains genes known to code enzymes that digest cellulose(Zhu et al.,2011),which was opposed later by a current study with larger sample size of captive pandas which suggested that panda's carnivore-like gut microbiota has not evolved to efficiently digest cellulose from a fibre-rich bamboo diet(Xue et al.201

关键词： Gut microbiota of giant panda

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Effects of Bacillus licheniformis on the growth performance and expression of lipid metabolism-related genes in broiler chickens challenged with Clostridium perfringens-induced necrotic enteritis

Effects of Bacillus licheniformis on the growth performance ...

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中国畜牧兽医学会动物微生态学分会第五届第十二次全国学术研讨会

作者： Mengjia Zhou Dong Zeng Xueqin Ni Teng Tu Zhongqiong Yin Kangcheng Pan Bo Jing Animal Microecology Institute College of Veterinary MedicineSichuan Agricultural University Key Laboratory of Animal Disease and Human Health of Sichuan Province Animal Genetics and Breeding Institute College of Animal Science and technology Sichuan Agricultural University

Background:Necrotic enteritis(NE),caused by Clostridium perfringens,has cost the poultry industry $2billion in *** study aimed to investigate the effect of Bacillus licheniformis as dietary supplement on the growth,serum antioxidant status,and expression of lipid-metabolism genes of broiler chickens with ***-induced ***:A total of 240 one-day-old broilers were randomly grouped into four:a negative control,an NE experimental model(PC),chickens fed a diet supplemented with 30%of fishmeal from day 14 onwards and challenged with coccidiosis vaccine(FC),and NE group supplied with feed containing 1.0×10～6 CFU/g ***(BL).Results:Body weight gain,feed conversion ratio,serum antioxidant status,and lipid-metabolism-gene expression were *** the PC group,FCR increased significantly whereas serum catalase and glutathione peroxidase activity decreased compared with NC *** *** supplementation improved FCR and oxidative stress in experimental avian *** Bacillus licheniformis as a direct-fed microbial(DFM) could also significantly upregulate catabolism-related genes,namely,peroxisome proliferator-activated receptor-α and carnitine palmitoyltransferase-1,in livers and changed the expression of lipid-anabolism ***:These results suggested that dietary *** supplementation can enhance growth and antioxidant ability,as well as change the expression of genes related to fatty-acid synthesis and oxidation in the livers of NE-infected broilers.

关键词： broiler chicken necrotic enteritis growth performance antioxidant lipid metabolism

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Preventing non-alcoholic fatty liver disease through Lactobacillus johnsonii BS15 by attenuating inflammation and mitochondrial injury and improving gut environment in obese mice

Preventing non-alcoholic fatty liver disease through Lactoba...

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中国畜牧兽医学会动物微生态学分会第五届第十二次全国学术研讨会

作者： Jinge Xin Dong Zeng Hesong Wang Xueqin Ni Dan Yi Kangcheng Pan Bo Jing Animal Microecology Institute College of Veterinary MedicineSichuan Agricultural University Key Laboratory of Animal Disease and Human Health of Sichuan Province

The increasing prevalence of obesity worldwide is associated with a parallel increase in non-alcoholic fatty liver disease(NAFLD).To investigate the effect of Lactobacillus johnsonii BS 15 on NAFLD,120 male ICR mice were randomly divided into four groups and administrated with BS 15(2×10～7 cfu/0.2 mL or 2×10～8 cfu/0.2 mL)or phosphate buffered saline(PBS) throughout a 17-week experimental *** mice were fed with normal chow diet(NCD) five weeks before the experimental ***,with the exception of the PBS group,NCD was changed into high-fat diet(HFD) for the remaining experimental *** showed that BS15-treated HFD mice were protected from hepatic steatosis and hepatocyte ***15 exhibited a positive effect on liver lipid peroxidation through an anti-oxidative stress activity by enhancing the liver antioxidant defense *** addition,BS15 inhibited the insulin resistance;decreased the mRNA levels of acetyl-CoA carboxylase 1,fatty acid synthase,and peroxisome proliferator-activated receptor y;and increased the expression of the fasting-induced adipose factor in ***,BS 15 attenuated mitochondria abnormalities when the content of uncoupling protein-2 decreased and cytochrome c increased in NAFLD *** 15 also reduced the level of serum lipopolysaccharide in NAFLD mice by lowering the intestinal permeability and adjusting gut flora,followed by the downregulation of the TNFα mRNA level in liver and the serum level of C-reactive *** findings suggest that BS15 may be effective in preventing NAFLD induced by HFD.

关键词： Lactobacillus johnsonii non-alcoholic fatty liver disease intestinal permeability hepatocyte apoptosis hepatic inflammation oxidative stress

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The bacterial communities associated with fecal types and body weight of rex rabbits

The bacterial communities associated with fecal types and bo...

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中国畜牧兽医学会动物微生态学分会第五届第十二次全国学术研讨会

作者： Bo Zeng Shushu Han Ping Wang Bin Wen Wensu Jian Wei Guo Zhiju Yu Dan Du Xiangchao Fu Fanli Kong Mingyao Yang Xiaohui Si Jiangchao Zhao Ying Li Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province Sichuan Agricultural University Sichuan Academy of Grassland Science Department of Pediatrics and Communicable Disease University of Michigan

Rex rabbit is an important small herbivore for fur and meat ***,little is known about the gut microbiota in rex rabbit,especially regarding their relationship with different fecal types and growth of the *** characterized the microbiota of both hard and soft feces from rex rabbits with high and low body weight by using the Illumina MiSeq platform targeting the V4 region of the 16 S *** weight rex rabbits possess distinctive microbiota in hard feces,but not in soft feces,from the low weight *** detected the overrepresentation of several genera such as YS2/Cyanobacteria,and Bacteroidales and underrepresentation of genera such as Anaeroplasma *** Clostridiaceae in high weight hard *** fecal types,several bacterial taxa such as Ruminococcaceae,and Akkermansia *** enriched in soft *** analysis revealed that metabolic pathways such as "stilbenoid,diarylheptanoid,gingerol biosynthesis" were enriched in high weight rabbits,and pathways related to "xenobiotics biodegradation" and "various types of N-glycan biosynthesis" were overrepresented in rabbit soft *** study provides foundation to generate hypothesis aiming to test the roles that different bacterial taxa play in the growth and caecotrophy of rex rabbits.

关键词： The bacterial communities associated with fecal types and body weight of rex rabbits

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The expression of immune-related gene of ducks infected with Avian pathogenic Escherichia coli(APEC)

The expression of immune-related gene of ducks infected with...

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中国畜牧兽医学会动物微生态学分会第五届第十二次全国学术研讨会

作者： Rong Li Ning Li Jinzhou Zhang Yao Wang Jiyuan Liu Yumei Cai Tongjie Chai Liangmeng Wei College of Animal Science and Veterinary Medicine Shandong Agricultural University Sino-German Cooperative Research Centre for Zoonosis of Animal Origin Shandong Province Collaborative Innovation Centre for the Origin and Control of Emerging Infectious Diseases of Taishan Medical College

Avian pathogenic Escherichia coli(APEC) can cause a serious disease in ducks,characterized by perihepatitis,pericarditis and *** the studies of bacteria isolation and methods of detection have been already reported,the host immune responses to APEC infection were still *** this research,we examined the expression of immune-related genes and bacteria distribution in APEC-infected ducks *** results demonstrated that APEC could quickly replicate in multiple tissues with the highest bacteria content in the spleen at 2 day post infection at early *** expressions of Toll-like receptors(TLRs),avian P-defensins(AvBDs) and Major histocompatibility complex(MHC) were tested in the liver,spleen and brain of the infected ***2,TLR4,TLRS and TLR15 showed different expression pattern,which indicated they were all response to APEC *** expression of AvBD2 was up-regulated in all the tested tissues,whereas the expression of AvBD4,AvBD5,AvBD7 and AvBD9 were down-regulated during three tested ***,MHC-Ⅰ was up-regulated at all tested days,but MHC-Ⅱ was dramatically *** study suggested that APEC could replicate in various tissues in a short time,and the activation of host immune responses begins at the initial time of *** results were useful to understand the immune responses of ducks infection with APEC and put insight into pathogenesis of APEC due to host facts.

关键词： Cherry Valley ducks APEC Host immune responses TLRs AvBDs MHCs

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Dietary administration of Bacillus subtilis HAINUP40 enhances growth,digestive enzyme activities,innate immune responses and disease resistance of tilapia,Oreochromis niloticus

Dietary administration of Bacillus subtilis HAINUP40 enhance...

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中国畜牧兽医学会动物微生态学分会第五届第十二次全国学术研讨会

作者： Shifeng Wang Haitian Liu Yan Cai Wei Yuan Yongcan Zhou Key Laboratory of Tropical Biological Resources of Ministry of Education College of Marine SciencesHainan University

The probiotic properties of Bacillus subtilis HAINUP40 isolated from the aquatic environment,and the effects of dietary administration of *** HAINUP40 on the growth performance,intestinal probiotic recovery,digestive enzyme activities,innate immunity and disease resistance of tilapia(Oreochromis niloticus) were *** probiotic properties investigated include tolerance to simulated gastrointestinal stress,auto-aggregation,cell surface hydrophobicity and extracellular enzyme *** cell number of *** changed little after 4 h in simulated gastric fluid at pH = 2.0,3.0,4.0 and small intestinal fluid at pH = *** HAINUP40 revealed a strong auto-aggregation property(34.6-87.0%) after a 24 h incubation *** exhibited significant cell surface hydrophobicity in xylene(28.8%) and chloroform(41.3%) and produced extracellular proteases and *** tilapia(mean weight = 95.02 ± 7.65 g) were fed with a diet containing 10～8cfu/g *** HAINUP40,their final body weight,percent weight gain(PWG),specific growth rate(SGR),total antioxidant capacity(T-AOC) and serum superoxide dismutase(SOD) increased significantly(p<0.05) after 8weeks;feed conversion rate(FCR) is significantly lower(p < 0.05) after 8 weeks;the protease and amylase activity in the digestive tract increased significantly(p<0.05) after 4 and 8 weeks;and respiratory bursts and serum lysozyme activity increased significantly(p< 0.05) after 2 ***,being challenged with pathogenic Streptococcus agalactiae for 2 weeks,the relative percent survival(RPS%) is 52.94%.The results of this study strongly suggest that dietary supplement of *** HAINUP40 can effectively enhances the growth performance,immune response,and disease resistance of Nile tilapia.

关键词： Bacillus subtilis HAINUP40 Tilapia(Oreochromis niloticus) Growth Digestive enzyme activity Innate immunity Protection

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