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salmonella enterica Flagellin Is Recognized via FLS2 and Activates PAMP-Triggered Immunity in Arabidopsis thaliana

Molecular Plant 2014年第4期7卷 657-674页

作者： Ana Victoria Garcia Amelie Charrier Adam Schikora Jean Bigeard Stephanie Pateyron Marie-Ludivine de Tauzia-Moreau Alexandre Evrard Axel Mithofer Marie Laure Martin-Magniette Isabelle Virlogeux-Payant Heribert Hirt Unite de Recherche en Genomique Vegetale (URGV) UMR INRA/CNRS/Universite d'Evry Val d'Essonne 91057 Evry France Institute for Plant Pathology and Applied Zoology Research Centre for BioSystems Land Use and Nutrition JL University Giessen Heinrich-Buff-Ring 26-32 35392 Giessen Germany Transcriptomic Platform Unite de Recherche en Genomique Vegetale (URGV) 91057 Evry France Department of Bioorganic Chemistry Max Planck Institute for Chemical Ecology Hans-Knoll-Str. 8 07745 Jena Germany INRA UMR 518 MIA 75005 Paris France AgroParisTech UMR 518 MIA 75005 Paris France INRA UMR 1282 infectiologie et Sante Publique 37380 Nouzilly France

Infections with salmonella enterica belong to the most prominent causes of food poisoning and infected fruits and vegetables represent important vectors for salmonellosis. Recent evidence indicates that plants recognize S. enterica and raise defense responses. Nonetheless, the molecular mechanisms controlling the interaction of S. enterica with plants are still largely unclear. Here, we show that flagellin from S. enterica represents a prominent pathogenassociated molecular pattern （PAMP） in Arabidopsis thaliana, which induces PAMP-triggered immunity （PTI） via the recognition of the fig22 domain by the receptor kinase FLS2. The Arabidopsis fls2 mutant shows reduced though not abolished PTI activation, indicating that plants rely also on recognition of other S. enterica PAMPs. Interestingly, the S. enterica type III secretion system （T3SS） mutant prgH- induced stronger defense gene expression than wild-type bacteria in Arabidopsis, suggesting that T3SS effectors are involved in defense suppression. Furthermore, we observe that S. enterica strains show variation in the fig22 epitope, which results in proteins with reduced PTI-inducing activity. Altogether, these results show that S. enterica activates PTI in Arabidopsis and suggest that, in order to accomplish plant colonization, S. enterica evolved strategies to avoid or suppress PTI.

关键词： salmonella enterica Arabidopsis thaliana flagellin FLS2 immunity.

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The temporal dynamics of antimicrobial-resistant salmonella enterica and predominant serovars in China

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National Science Review 2023年第3期10卷 60-76页

作者： Yanan Wang Yue Liu Na Lyu Zhiyuan Li Sufang Ma Demin Cao Yuanlong Pan Yongfei Hu Hua Huang George F.Gao Xuebin Xu the Bacterium-learning Union Baoli Zhu International Joint Research Center of National Animal Immunology College of Veterinary MedicineHenan Agricultural University CAS Key Laboratory of Pathogen Microbiology and Immunology Institute of Microbiology Chinese Academy of Sciences Department of Microbiology Shanghai Municipal Center for Disease Control and Prevention Savaid Medical School University of Chinese Academy of Sciences State Key Laboratory of Animal Nutrition College of Animal Science and Technology China Agricultural University Beijing Products Quality Supervision and Inspection Institute Chinese Center for Disease Control and Prevention(China CDC) Beijing Key Laboratory of Antimicrobial Resistance and Pathogen Genomics Department of Pathogenic Biology School of Basic Medical Sciences Southwest Medical University

salmonella enterica is one of the most common bacterial pathogens in humans and *** studies on the trends and geographical distribution of antimicrobial-resistant salmonella and dominant serovars have been well studied in European and American countries while not in ***,taking the One-Health strategy,we used>35 000 salmonella enterica isolates to explore the temporal and spatial dynamics of dominant serovars in *** found that salmonella Typhimurium was the dominant serovar causing human infection in China,which was consistent with Australia but inconsistent with North American and European *** proportion of salmonella serovars Typhimurium,London,Rissen,Corvallis,Meleagridis,Kentucky,and Goldcoast showed an increasing trend during *** randomly selected 1962 isolates for comparative genomics and antimicrobial resistance studies and found that the number of antibiotic resistance genes(ARGs) per isolate increased 1.84 and 2.69 times of human and non-human origins,respectively,spanning 14 *** proportion of antimicrobial-resistant salmonella isolates had an increasing trend during 2006-2019,especially beta-lactam,quinolone,tetracycline,and rifampicin ***,we found that higher diversity of sequence types(STs) in *** than in other serovars,ST34 from pig and ST 19 from chicken origin,were mainly associated with isolates causing child and adult gastro-infection,*** results fill in the data gap on the trends of dominant serovars and antimicrobial resistance of salmonella enterica in *** data provide useful information for public health decision-makers prioritizing interventions for foodborne diseases and food safety.

关键词： salmonella enterica food safety antimicrobial resistance whole-genome sequencing public health

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Survival, Proliferation and Cell Cycle of Swine Fibroblast after Infection with salmonella enterica

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Advances in Microbiology 2016年第13期6卷 942-952页

作者： Mizuki Masuda Yijie Guo Kengo Kuroda Jun Xu Hiroshi Yoneyama Tomokazu Fukuda Bernard Mudenda Hang’ombe Katsuya Okuno Junko Nishimura Emiko Isogai Laboratory of Animal Microbiology Graduate School of Agricultural Science Tohoku University Sendai Japan Department of Immunobiology and Pathogenic Biology Medical School of Xi’an Jiaotong University Xi’an China Laboratory of Cell Engineering and Molecular Genetics Faculty of Science and Engineering Iwate University Morioka Japan Department of Clinical Microbiology School of Veterinary Medicine University of Zambia Lusaka Zambia Laboratory of Nutrition and Life Sciences Department of Biotechnology and Environmental Engineering Faculty of Engineering Hachinohe Institute of Technology Hachinohe Japan

Food-borne salmonellosis continues to be a major health concern worldwide. Carry-contamination of salmonella frequently occurs in meat production. We focused on cell dynamics of swine fibroblasts after infection with salmonella enterica serovar Enteritidis and Typhimurium, because fibroblast can be a target cell for salmonella latent infection. It was found that both S. Enteritidis and S. Typhimurium were able to adhere and invade to swine fibroblasts. The proliferations in fibroblasts were different between each serovar. S. Enteritidis reached to the maximum at 24 hr after infection while S. Typhimurium did not. In addition, the decrease in the G0/G1 phase cells and increase in G2/M phase cells on the fibroblast were observed by both salmonella infection. Cell death including apoptosis in the cells was inhibited by the infection of salmonella. These results suggest that nontyphoidal salmonella can survive for the long term by modifying bacterial cell proliferation and preventing cell death of host cells.

关键词： salmonella enterica Fibroblast Swine Cell Death Cell Cycle

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Simple Biochemical Detection and 16S rRNA-Based analysis of veterinary salmonella enterica

Simple Biochemical Detection and 16S rRNA-Based analysis of ...

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第四届全国牛病防制及产业发展大会

作者： Qiwei Chen Xiaowei Gong Fuying Zheng Xiaoan Cao Hong Yin Youquan Li Jizhang Zhou State Key Laboratory of Veterinary Etiological Biology Key Laboratory of Veterinary Public Health of Ministry of AgricultureLanzhou Veterinary Research InstituteChinese Academy of Agricultural Sciences

In this study,we provide more rapid,unambiguous identification of salmonella enterica.A total of seventeen isolates of salmonella（***）enterica were identified from swine（n=7）,cattle（n=5）and sheep（n=5）from *** isolates were confirmed as *** by 16S rRNA sequence analysis and traditional Biochemical profiling identification,which was the combination of two methods in order to promote meaningful and scientifically accurate communications with identified isolates.

关键词： salmonella enterica 16S rRNA Biochemical Detection Rapid identification

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