title: Insights into Vibrio parahaemolyticus CHN25 response to artificial gastric fluid stress by transcriptomic analysis.
abstract: Vibrio parahaemolyticus is the causative agent of food-borne gastroenteritis disease. Once consumed, human acid gastric fluid is perhaps one of the most important environmental stresses imposed on the bacterium. Herein, for the first time, we investigated Vibrio parahaemolyticus CHN25 response to artificial gastric fluid (AGF) stress by transcriptomic analysis. The bacterium at logarithmic growth phase (LGP) displayed lower survival rates than that at stationary growth phase (SGP) under a sub-lethal acid condition (pH 4.9). Transcriptome data revealed that 11.6% of the expressed genes in Vibrio parahaemolyticus CHN25 was up-regulated in LGP cells after exposed to AGF (pH 4.9) for 30 min, including those involved in sugar transport, nitrogen metabolism, energy production and protein biosynthesis, whereas 14.0% of the genes was down-regulated, such as ATP-binding cassette (ABC) transporter and flagellar biosynthesis genes. In contrast, the AGF stress only elicited 3.4% of the genes from SGP cells, the majority of which were attenuated in expression. Moreover, the number of expressed regulator genes was also substantially reduced in SGP cells. Comparison of transcriptome profiles further revealed forty-one growth-phase independent genes in the AGF stress, however, half of which displayed distinct expression features between the two growth phases. Vibrio parahaemolyticus seemed to have evolved a number of molecular strategies for coping with the acid stress. The data here will facilitate future studies for environmental stresses and pathogenicity of the leading seafood-borne pathogen worldwide.
authors.affiliation: Key Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), China Ministry of Agriculture College of Food Science and Technology, Shanghai Ocean University, 999 Hu Cheng Huan Road, Shanghai 201306, China. m120250546@st.shou.edu.cn.
authors.forename: Xuejiao
authors.initials: X
authors.lastname: Sun
authors.affiliation: College of Information Technology, Shanghai Ocean University, 999 Hu Cheng Huan Road, Shanghai 201306, China. tgliu@shou.edu.cn.
authors.forename: Taigang
authors.initials: T
authors.lastname: Liu
authors.affiliation: Archaea Centre, Department of Biology, University of Copenhagen, Ole Maaløes Vej 5, DK2200 Copenhagen N, Denmark. peng@bio.ku.dk.
authors.forename: Xu
authors.initials: X
authors.lastname: Peng
authors.affiliation: Key Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), China Ministry of Agriculture College of Food Science and Technology, Shanghai Ocean University, 999 Hu Cheng Huan Road, Shanghai 201306, China. lmchen@shou.edu.cn.
authors.forename: Lanming
authors.initials: L
authors.lastname: Chen
mesh_terms: D000220:Adaptation, Biological / Q000235:genetics; D005744:Gastric Acid; D005750:Gastric Juice; D020869:Gene Expression Profiling; D015964:Gene Expression Regulation, Bacterial / Q000187:drug effects; D059647:Gene-Environment Interaction; D006863:Hydrogen-Ion Concentration; D053858:Metabolic Networks and Pathways; D050296:Microbial Viability / Q000187:drug effects; D013312:Stress, Physiological; D059467:Transcriptome; D014736:Vibrio parahaemolyticus / Q000187:drug effects / Q000502:physiology*