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Weaning-associated feed deprivation stress causes microbiota disruptions in a novel mucin-containing in vitro model of the piglet colon(MPigut-IVM)

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Journal of Animal Science and Biotechnology 2021年第4期12卷 1428-1450页

作者： Raphaële Gresse Frédérique Chaucheyras-Durand Sylvain Denis Martin Beaumont Tom Van de Wiele Evelyne Forano Stéphanie Blanquet-Diot UniversitéClermont Auvergne INRAEUMR 454 MEDISF-63000 Clermont-FerrandFrance lallemand sas F-31702 BlagnacCedexFrance GenPhySE Universitéde ToulouseINRAEENVTF-31326 Castanet-TolosanFrance Ghent University Center for Microbial Ecology and TechnologyB-9000 GhentBelgium

Background:Risk factors for the etiology of post-weaning diarrhea,a major problem in swine industry associated with enormous economic losses,remain to be fully *** concordance with the ethical concerns raised by animal experiments,we developed a new in vitro model of the weaning piglet colon(MPigut-IVM)including a mucin bead compartment to reproduce the mucus surface from the gut to which gut microbes can ***:Our results indicated that the MPigut-IVM is able to establish a representative piglet archaeal and bacterial colon microbiota in terms of taxonomic composition and *** MPigut-IVM was consequently used to investigate the potential effects of feed deprivation,a common consequence of weaning in piglets,on the *** lack of nutrients in the MPigut-IVM led to an increased abundance of Prevotellaceae and Escherichia-Shigella and a decrease in Bacteroidiaceae and confirms previous in vivo *** top of a strong increase in redox potential,the feed deprivation stress induced modifications of microbial metabolite production such as a decrease in acetate and an increase in proportional valerate,isovalerate and isobutyrate ***:The MPigut-IVM is able to simulate luminal and mucosal piglet microbiota and represent an innovative tool for comparative studies to investigate the impact of weaning stressors on piglet ***,weaning-associated feed deprivation in piglets provokes disruptions of MPigut-IVM microbiota composition and functionality and could be implicated in the onset of post-weaning dysbiosis in piglets.

关键词： Colon Dysbiosis In vitro gut model Microbiota Mucin Piglet Weaning

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Effects of paraprobiotics on bile acid metabolism and liver health in largemouth bass(Micropterus salmoides)fed a cottonseed protein concentrate-based diet

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Animal Nutrition 2023年第2期13卷 302-312页

作者： Xiaoze Xie Xiaofang Liang Hao Wang Qiang Zhu Junjun Wang Ying Chang Eric Leclercq Min Xue Jie Wang National Aquafeed Safety Assessment Center Institute of Feed ResearchChinese Academy of Agricultural SciencesBeijing 100081China Xinjiang Jinlan Plant Protein Co. LtdShihezi 833200China State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China lallemand sas Blagnac 31702France

Cottonseed protein concentrate is a sustainable fishmeal alternative in aquafeed.A 10-week experiment was conducted to investigate the effects of a cottonseed protein concentrate-based diet with and without multi-strain yeast fractions(MsYF)on growth,bile acid metabolism,and health in largemouth *** hundred fish(54.0±0.0 g)were casually distributed into 16 tanks(4 replicates/diet).Fish were fed with 4 iso-nitrogen and iso-energetic diets 3 times daily,including a fishmeal diet(FM),a soy protein concentrate-based diet(SPC;replacing 81%fishmeal protein),a cottonseed protein concentrate-based diet(CPC;replacing 81%fishmeal protein),and a CPC diet supplemented with 800 mg/kg MsYF(CPCY).Results showed that the survival of SPC was the lowest,i.e.,48%,with no apparent diet effect among other treatments;we omitted the SPC in additional *** fed cottonseed protein concentrate-based diets showed lower growth than FM(P<0.05).Fish fed CPC showed the highest nuclear dense hepatic phenotypes ratio(50%),followed by CPCY(33%)and FM(17%).Further,dietary CPC increased hepatic total cholesterol and triglyceride levels with concurrently increased cholesterol syn-thesis but decreased triglyceride synthesis-associated transcription levels(P<0.05).Furthermore,di-etary CPC increased bile acid synthesis but decreased bile acid transport-associated transcription levels(P<0.05),and then induced an increment of plasma cholic acid and hepatic chenodeoxycholic acid content and the decrement of genus Romboustia(P<0.05).Regarding the effect of MsYF,fish fed CPCY reduced hepatic lipid accumulation and total plasma bile acid content(P<0.05)compared to CPC,suggesting an improvement in liver ***,dietary MsYF could reverse the microbiota community structure showing a similar gut microbial composition to *** conclusion,81%of fishmeal protein replaced by cottonseed protein concentrate suppressed growth and liver health,while dietary MsYF might mitigate the negative impact of a hi

关键词： Cottonseed protein concentrate Multi-yeast strain fractions Micropterus salmoides Liver health Bile acid metabolism Gut microbiota

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Bacteria colonization and gene expression related to immune function in colon mucosa is associated with growth in neonatal calves regardless of live yeast supplementation

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Journal of Animal Science and Biotechnology 2024年第5期15卷 1980-1995页

作者： Koki Nishihara Clothilde Villot Lautaro Cangiano Le Luo Guan Michael Steele Department of Animal Biosciences Animal Science and NutritionUniversity of GuelphGuelphON N1G 1Y2Canada Department of Agricultural Food and Nutritional ScienceUniversity of AlbertaEdmonton T6G 2P5Canada lallemand sas Blagnac F‑31702France Department of Animal and Dairy Sciences University of Wisconsin-MadisonMadisonWIUSA Faculty of Land and Food Systems The University of British ColumbiaVancouverBC V6T 1Z4Canada Present Address:Department of Animal Biosciences University of GuelphGuelphON N1G 2W1Canada

Background As Holstein calves are susceptible to gastrointestinal disorders during the first week of life,understanding how intestinal immune function develops in neonatal calves is important to promote better intestinal *** probiotics in early life may contribute to host intestinal health by facilitating beneficial bacteria colonization and developing intestinal immune *** objective of this study was to characterize the impact of early life yeast supplementation and growth on colon mucosa-attached bacteria and host immune *** Twenty Holstein bull calves received no supplementation(CON)or Saccharomyces cerevisiae boulardii(SCB)from birth to 5 d of *** tissue biopsies were taken within 2 h of life(D0)before the first colostrum feeding and 3 h after the morning feeding at d 5 of age(D5)to analyze mucosa-attached bacteria and colon *** sequencing showed that there was no difference inαandβdiversity of mucosa-attached bacteria between day and treatment,but bacteria related to diarrhea were more abundant in the colon mucosa on D0 compared to *** addition,q PCR indicated that the absolute abundance of Escherichia coli(***)decreased in the colon mucosa on D5 compared to D0;however,that of Bifidobacterium,Lactobacillus,and Faecalibacterium prausnitzii,which could competitively exclude ***,increased in the colon mucosa on D5 compared to ***-sequencing showed that there were no differentially expressed genes between CON and SCB,but suggested that pathways related to viral infection such as“Interferon Signaling”were activated in the colon mucosa of D5 compared to *** Growth affected mucosa-attached bacteria and host immune function in the colon mucosa during the first 5 d of life in dairy calves independently of SCB *** early life,opportunistic pathogens may decrease due to intestinal environmental changes by beneficial bacteria and/or host immune *** activation

关键词： Colon biopsy Dairy calves RNA-sequencing Saccharomyces cerevisiae boulardii 16S rRNA amplicon-sequencing

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