1
|
Song D, Jia A, Qi X, Dong K, Liu S, Man C, Yang X, Jiang Y. Co-culture of Cronobacter sakazakii and Staphylococcus aureus: Explore the influence of mixed biofilm formation and regulation of Cronobacter sakazakii biofilm formation genes. Food Res Int 2023; 173:113457. [PMID: 37803782 DOI: 10.1016/j.foodres.2023.113457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 09/01/2023] [Accepted: 09/10/2023] [Indexed: 10/08/2023]
Abstract
Bacterial biofilm is a protective matrix composed of metabolites secreted by bacteria that envelop bacteria. By forming a biofilm, bacteria can considerably improve their environmental tolerance. In food-related processing environment, different types of microorganisms are often present in biofilms. The main contaminating strain in the powdered infant formula (PIF) processing environment, Cronobacter sakazakii and Staphylococcus aureus continues to pollute the PIF processing environment after biofilm production. This study selected Cronobacter sakazakii with a weak biofilm-forming ability as one of the test organisms. The coexistence of Cronobacter sakazakii and Staphylococcus aureus on the surface of production equipment was simulated to analyze the interaction. Biofilm formation in the co-culture group was significantly higher than the others. In-depth study of the effect of Staphylococcus aureus on the biofilm formation genes of Cronobacter sakazakii. Results show two bacteria can coexist on the surface of a metal device, forming a more compact hybrid biofilm structure. Under co-culture conditions, S. aureus increased bcsA and fliD expression in Cronobacter sakazakii, whereas decreased bcsC expression. Signaling molecules produced by Staphylococcus aureus (Autoinducer 2) significantly promoted the biofilm formation of Cronobacter sakazakii at the concentration of 0-500 ng/mL (0.099-0.177) and up-regulated the expression of bcsA, filD and flhD genes.
Collapse
Affiliation(s)
- Danliangmin Song
- Department of Food Science, Northeast Agricultural University, Harbin 150038, China.
| | - Ai Jia
- Department of Food Science, Northeast Agricultural University, Harbin 150038, China.
| | - Xuehe Qi
- Department of Food Science, Northeast Agricultural University, Harbin 150038, China.
| | - Kai Dong
- Department of Food Science, Northeast Agricultural University, Harbin 150038, China.
| | - Shiyu Liu
- Department of Food Science, Northeast Agricultural University, Harbin 150038, China.
| | - Chaoxin Man
- Key Laboratory of Dairy Science, Ministry of Education, Harbin 150030, China.
| | - Xinyan Yang
- Key Laboratory of Dairy Science, Ministry of Education, Harbin 150030, China.
| | - Yujun Jiang
- Department of Food Science, Northeast Agricultural University, Harbin 150038, China.
| |
Collapse
|
2
|
Lin Z, Wang G, Zhang K, Jiang S, Li S, Yang H. Metabolomics investigation of global responses of Cronobacter sakazakii against common sanitizing in infant formula processing environments. Food Res Int 2023; 172:113162. [PMID: 37689917 DOI: 10.1016/j.foodres.2023.113162] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 06/14/2023] [Accepted: 06/16/2023] [Indexed: 09/11/2023]
Abstract
Cronobacter sakazakii, an opportunistic bacterium, has raised a serious outbreak in powdered infant formula recent years. In this work, four sanitizing strategies used during infant formula processing, including chlorine, quaternary ammonium chloride (QAC), 60 °C heating, and malic acid (MA), were utilized against C. sakazakii among planktonic, air-dried (A), and air-dried & washed (AW) state, followed by an exploration of the metabolic responses induced by these treatments via a dual-platform metabolomics analysis with the ultra-high performance liquid chromatography-mass spectrometry and nuclear magnetic resonance. In the planktonic state, MA was the most effective in inhibiting bacterial growth, followed by chlorine, QAC, and 60 °C heating. Under A state, the efficacy of heating improved considerably, compared to that in the planktonic state, and remained unaltered under AW state. Chlorine and QAC were ineffective to control bacterial growth under A state, but their efficacy rose under AW state. Furthermore, the metabolomic analysis revealed chlorine induces amino acids catabolism, membrane lysis, and depression in carbohydrate and nucleotide metabolism in both planktonic and AW states, while the initiation of antioxidation mechanism was only found under AW state. Although the metabolic change caused by QAC in the planktonic state was similar to chlorine, the accumulation of osmoprotectant and membrane phospholipids within the AW cells reflected the effort to restore intracellular homeostasis upon QAC. Heating was characterized by considerable amino acid anabolism, along with mildly perturbed carbohydrate and nucleotide metabolism for heat shock protein preparation in both states. Lastly, MA promoted amino acid-dependent acid resistance under the planktonic state, and the regulation of antioxidation and osmoprotection under AW state. The metabolomics study elucidated the intracellular perturbation induced by common sanitizing, as well as the bacterial response, which provides insights for novel sanitization development.
Collapse
Affiliation(s)
- Zejia Lin
- Department of Food Science & Technology, National University of Singapore, Singapore 117542, Singapore.
| | - Guoshu Wang
- Department of Food Science & Technology, National University of Singapore, Singapore 117542, Singapore
| | - Kexin Zhang
- Department of Food Science & Technology, National University of Singapore, Singapore 117542, Singapore
| | - Shaoqian Jiang
- Department of Food Science & Technology, National University of Singapore, Singapore 117542, Singapore
| | - Songshen Li
- Department of Food Science & Technology, National University of Singapore, Singapore 117542, Singapore
| | - Hongshun Yang
- Shaoxing Key Laboratory of Traditional Fermentation Food and Human Health, Jiangnan University (Shaoxing) Industrial Technology Research Institute, Zhejiang 312000, China
| |
Collapse
|
3
|
Schumacher K, Brameyer S, Jung K. Bacterial acid stress response: from cellular changes to antibiotic tolerance and phenotypic heterogeneity. Curr Opin Microbiol 2023; 75:102367. [PMID: 37633223 DOI: 10.1016/j.mib.2023.102367] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 07/21/2023] [Accepted: 07/24/2023] [Indexed: 08/28/2023]
Abstract
Most bacteria are neutralophiles but can survive fluctuations in pH in their environment. Herein, we provide an overview of the adaptation of several human, soil, and food bacteria to acid stress, mainly based on next-generation sequencing studies, highlighting common and specific strategies. We also discuss the interplay between acid stress response and antibiotic tolerance, as well as the response of individual cells.
Collapse
Affiliation(s)
- Kilian Schumacher
- Faculty of Biology, Microbiology, Ludwig-Maximilians-Universität München, 82152 Martinsried, Germany
| | - Sophie Brameyer
- Faculty of Biology, Microbiology, Ludwig-Maximilians-Universität München, 82152 Martinsried, Germany
| | - Kirsten Jung
- Faculty of Biology, Microbiology, Ludwig-Maximilians-Universität München, 82152 Martinsried, Germany.
| |
Collapse
|
4
|
Jang HY, Kim MJ, Bae M, Hwang IM, Lee JH. Transcriptional analysis of the molecular mechanism underlying the response of Lactiplantibacillus plantarum to lactic acid stress conditions. Heliyon 2023; 9:e16520. [PMID: 37303574 PMCID: PMC10250755 DOI: 10.1016/j.heliyon.2023.e16520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 05/02/2023] [Accepted: 05/19/2023] [Indexed: 06/13/2023] Open
Abstract
Lactic acid bacteria (LAB) present various benefits to humans; they play key roles in the fermentation of food and as probiotics. Acidic conditions are common to both LAB in the intestinal tract as well as fermented foods. Lactiplantibacillus plantarum is a facultative homofermentative bacterium, and lactic acid is the end metabolite of glycolysis. To characterize how L. plantarum responds to lactic acid, we investigated its transcriptome following treatment with hydrochloride (HCl) or dl-lactic acid at an early stage of growth. Bacterial growth was more attenuated in the presence of lactic acid than in the presence of HCl at the same pH range. Bacterial transcriptome analysis showed that the expression of 67 genes was significantly altered (log2FC > 2 or < 2). A total of 31 genes were up- or downregulated under both conditions: 19 genes in the presence of HCl and 17 genes in the presence of dl-lactic acid. The fatty acid synthesis-related genes were upregulated in both acidic conditions, whereas the lactate racemization-related gene (lar) was only upregulated following treatment with dl-lactic acid. In particular, lar expression increased following l-lactic acid treatment but did not increase following HCl or d-lactic acid treatment. Expression of lar and production of d-lactic acid were investigated with malic and acetic acid; the results revealed a higher expression of lar and production of d-lactic acid in the presence of malic acid than that in the presence of acetic acid.
Collapse
|
5
|
Peng J, Xu Z, Li L, Zhao B, Guo Y. Disruption of the sensor kinase phoQ gene decreases acid resistance in plant growth-promoting rhizobacterium Rahnella aquatilis HX2. J Appl Microbiol 2023; 134:6991427. [PMID: 36748653 DOI: 10.1093/jambio/lxad009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/24/2022] [Accepted: 01/17/2023] [Indexed: 01/20/2023]
Abstract
AIMS Rahnella aquatilis HX2, a promising plant growth-promoting rhizobacterium (PGPR) in the field, contains genes homologous to the PhoP/PhoQ two-component regulatory system. Although this system regulates stress response in numerous pathogens, PhoP/PhoQ characterization in a PGPR has not received in-depth exploration. METHODS AND RESULTS The phoQ gene was mutated in strain HX2 using an in-frame deletion strategy. Compared to the wild type, the phoQ mutant exhibited increased sensitivity to acidic conditions (pH 4.0) in a chemically defined medium and in mild acidic natural soil (pH 5.7). The phoQ mutant also exhibited increased swimming motility under acidic conditions. Acid resistance was restored in the mutant by introducing the phoQ gene on a plasmid. Three acid resistance genes, add, cfa, and fur were downregulated significantly, whereas the chaperone encoding gene, dnak, was upregulated when the phoQ mutant was exposed to acid stress. CONCLUSIONS This study suggested that the PhoP/PhoQ system positively regulates the acid resistance of R. aquatilis HX2.
Collapse
Affiliation(s)
- Jing Peng
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.,Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing 100193, China
| | - Zhongnan Xu
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.,Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing 100193, China
| | - Lei Li
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.,Institute of Vegetables and Flowers, Chinese Academy of Agricultural Science, Beijing 100081, China
| | - Bingjie Zhao
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.,Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing 100193, China
| | - Yanbin Guo
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.,Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing 100193, China
| |
Collapse
|
6
|
Transcriptomic and phenotypic changes of Cronobacter sakazakii ATCC 29544 grown under desiccation stress. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2022.114279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
7
|
Li W, Wang S, Chen Y, Liu L, Hou S, You H. Integration of transcriptomic and proteomic reveals the toxicological molecular mechanisms of decabromodiphenyl ethane (DBDPE) on Pleurotus ostreatus. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 314:120263. [PMID: 36155225 DOI: 10.1016/j.envpol.2022.120263] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 09/13/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Decabromodiphenyl ethane (DBDPE), as one of the most widely used new brominated flame retardants (NBFRs), can pose a potential threat to human health and the environment. An integrated transcriptome and proteome was performed for investigating the toxicological molecular mechanisms of Pleurotus ostreatus (P. ostreatus) during the biodegradation of DBDPE at the concentrations of 5 and 20 mg/L. A total of 1193/1018 and 92/126 differentially expressed genes/proteins (DEGs/DEPs) were found, respectively, with DBDPE exposure at 5 and 20 mg/L. These DEGs and DEPs were mainly involved in the cellular process as well as metabolic process. DEPs for oxidation-reduction process and hydrolase activity were up-regulated, and those for membrane, lipid metabolic process and transmembrane transport were down-regulated. The DEGs and DEPs related to some key enzymes were down-regulated, such as NADH dehydrogenase/oxidoreductase, succinate dehydrogenase, cytochrome C1 protein, cytochrome-c oxidase/reductase and ATP synthase, which indicated that DBDPE affected the oxidative phosphorylation as well as tricarboxylic acid (TCA) cycle. Cytochrome P450 enzymes (CYPs) might be involved in DBDPE degradation through hydroxylation and oxidation. Some stress proteins were induced to resist DBDPE toxicity, including major facilitator superfamily (MFS) transporter, superoxide dismutase (SOD), molecular chaperones, heat shock proteins (HSP20, HSP26, HSP42), 60S ribosomal protein and histone H4. The findings help revealing the toxicological molecular mechanisms of DBDPE on P. ostreatus, aiming to improve the removal of DBDPE.
Collapse
Affiliation(s)
- Wanlun Li
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Shutao Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China.
| | - Yangyang Chen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Lu Liu
- The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Shuying Hou
- The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Hong You
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
| |
Collapse
|
8
|
Li J, Wang R, Zhao L, Wang M, Wang R, Guo D, Yang Y, Li Y, Guan N, Shi Y, Xia X, Shi C. Stress tolerance and transcriptomic response analysis of Yersinia enterocolitica adapted to Origanum vulgare L. essential oil. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
9
|
Chen X, Shang C, Zhang H, Sun C, Zhang G, Liu L, Li C, Li A, Du P. Effects of Alkali Stress on the Growth and Menaquinone-7 Metabolism of Bacillus subtilis natto. Front Microbiol 2022; 13:899802. [PMID: 35572665 PMCID: PMC9096614 DOI: 10.3389/fmicb.2022.899802] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Accepted: 04/08/2022] [Indexed: 11/28/2022] Open
Abstract
Menaquinone-7 (MK-7) is an important vitamin K2, synthesized from the menaquinone parent ring and seven isoprene side chains. Presently, the synthesis of MK-7 stimulated by environmental stress primarily focuses on oxygen stress, while the effect of alkali stress is rarely studied. Therefore, this study researched the effects of alkali stress on the fermentation performance and gene expression of Bacillus subtilis natto. The organism’s growth characteristics, biomass, sporogenesis, MK-7 biosynthesis, and gene expression were analyzed. After a pH 8.5 stress adaptation treatment for 0.5 h and subsequent fermentation at pH 8.5, which promoted the growth of the strain and inhibited the spore formation rate. In addition, biomass was significantly increased (P < 0.05). The conversion rate of glycerol to MK-7 was 1.68 times higher than that of the control group, and the yield of MK-7 increased to 2.10 times. Transcriptomic analysis showed that the MK-7 high-yielding strain had enhanced carbon source utilization, increased glycerol and pyruvate metabolism, enhanced the Embden-Meyerhof pathway (EMP), tricarboxylic acid (TCA) circulation flux, and terpenoid biosynthesis pathway, and promoted the accumulation of acetyl-CoA, the side-chain precursor of isoprene. At the same time, the up-regulation of transketolase increased the metabolic flux of the pentose phosphate (HMP) pathway, which was conducive to the accumulation of D-erythrose 4-phosphate, the precursor of the menadione parent ring. This study’s results contribute to a better understanding of the effects of environmental stress on MK-7 fermentation by Bacillus subtilis natto and the molecular regulatory mechanism of MK-7 biosynthesis.
Collapse
Affiliation(s)
- Xiaoqian Chen
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin, China
| | - Chao Shang
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin, China
| | - Huimin Zhang
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin, China
| | - Cuicui Sun
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin, China
| | - Guofang Zhang
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin, China
| | - Libo Liu
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin, China
| | - Chun Li
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin, China.,Heilongjiang Green Food Science Research Institute, Harbin, China
| | - Aili Li
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin, China.,Heilongjiang Green Food Science Research Institute, Harbin, China
| | - Peng Du
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin, China
| |
Collapse
|
10
|
Ribosome Profiling Reveals Genome-Wide Cellular Translational Regulation in Lacticaseibacillus rhamnosus ATCC 53103 under Acid Stress. Foods 2022; 11:foods11101411. [PMID: 35626981 PMCID: PMC9140532 DOI: 10.3390/foods11101411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 05/10/2022] [Accepted: 05/11/2022] [Indexed: 11/23/2022] Open
Abstract
During fermentation and food processing, Lacticaseibacillus rhamnosus ATCC 53103 can encounter many adverse conditions, and acid stress is one of them. The purpose of the present study was to investigate the influence of acid stress on the global translational and transcriptional regulation of Lacticaseibacillus rhamnosus ATCC 53103. Two pH values (pH 6.0 vs. pH 5.0) were applied, the effects of which were studied via ribosome profiling and RNA sequencing assay. Under acid stress, many genes showed differential changes at the translational and transcriptional levels. A total of 10 genes showed different expression trends at the two levels. The expression of 337 genes—which mainly participated in the ABC transporters, amino acid metabolism, and ribosome functional group assembly pathways—was shown to be regulated only at the translational level. The translational efficiency of a few genes participating in the pyrimidine and amino acid metabolism pathways were upregulated. Ribosome occupancy data suggested that ribosomes accumulated remarkably in the elongation region of open reading frame regions under acid stress. This study provides new insights into Lacticaseibacillus rhamnosus ATCC 53103 gene expression under acid stress, and demonstrates that the bacterium can respond to acid stress with synergistic translational and transcriptional regulation mechanisms, improving the vitality of cells.
Collapse
|
11
|
He S, Cui Y, Dong R, Chang J, Cai H, Liu H, Shi X. Global transcriptomic analysis of ethanol tolerance response in Salmonella Enteritidis. Curr Res Food Sci 2022; 5:798-806. [PMID: 35600539 PMCID: PMC9114158 DOI: 10.1016/j.crfs.2022.04.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 04/07/2022] [Accepted: 04/26/2022] [Indexed: 11/03/2022] Open
Abstract
Adaptation to sublethal amounts of ethanol enables Salmonella Enteritidis to survive under normally lethal ethanol conditions, which is referred to as the ethanol tolerance response (ETR). To uncover mechanisms underlying this adaptative response, RNA-seq and RT-qPCR techniques were employed to reveal global gene expression patterns in S. Enteritidis after sublethal ethanol treatment. It was observed that 811 genes were significantly differentially expressed in ethanol-treated cells compared with control cells, among which 328 were up-regulated and 483 were down-regulated. Functional analysis revealed that these genes were enriched in different pathways, including signal transduction, membrane transport, metabolism, transcription, translation, and cell motility. Specifically, a couple of genes encoding histidine kinases and response regulators in two-component systems were up-regulated to activate sensing and signaling pathways. Membrane function was also influenced by ethanol treatment since ABC transporter genes for transport of glutamate, phosphate, 2-aminoethylphosphonate, and osmoprotectant were up-regulated, while those for transport of iron complex, manganese, and ribose were down-regulated. Accompanied with this, diverse gene expression alterations related to the metabolism of amino acids, carbohydrates, vitamins, and nucleotides were observed, which suggested nutritional requirements for S. Enteritidis to mount the ETR. Furthermore, genes associated with ribosomal units, bacterial chemotaxis, and flagellar assembly were generally repressed as a possible energy conservation strategy. Taken together, this transcriptomic study indicates that S. Enteritidis employs multiple genes and adaptation pathways to develop the ETR. A total of 811 genes were involved in ethanol tolerance of Salmonella Enteritidis. Certain genes encoding two-component signaling systems were upregulated. Differential expression of many metabolism-related genes was observed. Bacterial chemotaxis and flagellar assembly were repressed by ethanol stress. Diverse membrane transport functions were influenced by ethanol stress.
Collapse
|
12
|
Heat shock in Cronobacter sakazakii induces direct protection and cross-protection against simulated gastric fluid stress. Food Microbiol 2022; 103:103948. [DOI: 10.1016/j.fm.2021.103948] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 11/10/2021] [Accepted: 11/13/2021] [Indexed: 11/21/2022]
|
13
|
Liang S, Hu X, Wang R, Fang M, Yu Y, Xiao X. The combination of thymol and cinnamaldehyde reduces the survival and virulence of Listeria monocytogenes on autoclaved chicken breast. J Appl Microbiol 2022; 132:3937-3950. [PMID: 35178822 DOI: 10.1111/jam.15496] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/24/2022] [Accepted: 02/14/2022] [Indexed: 11/28/2022]
Abstract
AIMS To reveal the antibacterial mechanism of the combination of thymol and cinnamaldehyde to Listeria monocytogenes ATCC 19115 on autoclaved chicken breast. METHODS AND RESULTS In this study, Listeria monocytogenes ATCC 19115 on autoclaved chicken breast was exposed to the stress of 125 μg/mL thymol and 125 μg/mL cinnamaldehyde, and transcriptome analysis was used to reveal the crucial antibacterial mechanism. According to the results, 1303 significantly differentially expressed genes (DEGs) were identified. Treated by thymol and cinnamaldehyde in combination, pyrimidine and branched-chain amino acids biosynthesis of L. monocytogenes were thwarted which impairs its nucleic acid biosynthesis and intracellular metabolism. The up-regulated DEGs involved in membrane composition and function contributed to membrane repair. Besides, pyruvate catabolism and TCA cycle were restrained which brought about the disturbance of amino acid metabolism. ABC transporters were also perturbed, for instance, the uptake of cysteine, D-methionine and betaine was activated, while the uptake of vitamin, iron and carnitine was repressed. Thus, L. monocytogenes tended to activate PTS, glycolysis, glycerol catabolism, and pentose phosphate pathways to obtain energy to adapt to the hostile condition. Noticeably, DEGs involved in virulence factors were totally down-regulated, including genes devoted to encoding flagella, chemotaxis, biofilm formation, internalin as well as virulence gene clusters. CONCLUSIONS The combination of thymol and cinnamaldehyde is effective to reduce the survival and potential virulence of L. monocytogenes on autoclaved chicken breast. SIGNIFICANCE AND IMPACT OF STUDY This work contributes to providing theoretical information for the application and optimization of thymol and cinnamaldehyde in ready-to-eat meat products to inhibit L. monocytogenes.
Collapse
Affiliation(s)
- Siwei Liang
- Research Center of Food Safety and Detection, School of Food Sciences and Engineering, South China University of Technology, Guangdong Province, Guangzhou City, 510640, China
| | - Xinyi Hu
- Research Center of Food Safety and Detection, School of Food Sciences and Engineering, South China University of Technology, Guangdong Province, Guangzhou City, 510640, China
| | - Ruifei Wang
- Research Center of Food Safety and Detection, School of Food Sciences and Engineering, South China University of Technology, Guangdong Province, Guangzhou City, 510640, China
| | - Meimei Fang
- Research Center of Food Safety and Detection, School of Food Sciences and Engineering, South China University of Technology, Guangdong Province, Guangzhou City, 510640, China
| | - Yigang Yu
- Research Center of Food Safety and Detection, School of Food Sciences and Engineering, South China University of Technology, Guangdong Province, Guangzhou City, 510640, China
| | - Xinglong Xiao
- Research Center of Food Safety and Detection, School of Food Sciences and Engineering, South China University of Technology, Guangdong Province, Guangzhou City, 510640, China
| |
Collapse
|
14
|
Kang J, Zhou X, Zhang W, Pei F, Ge J. Transcriptomic analysis of bacteriocin synthesis and stress response in Lactobacillus paracasei HD1.7 under acetic acid stress. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112897] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
15
|
Wang L, Forsythe SJ, Yang X, Fu S, Man C, Jiang Y. Invited review: Stress resistance of Cronobacter spp. affecting control of its growth during food production. J Dairy Sci 2021; 104:11348-11367. [PMID: 34364644 DOI: 10.3168/jds.2021-20591] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Accepted: 06/17/2021] [Indexed: 11/19/2022]
Abstract
Members of the Cronobacter genus include food-borne pathogens that can cause infections in infants, with a mortality rate as high as 40 to 80%. The high fatality rate of Cronobacter and its isolation from numerous types of food, especially from powdered infant formula, demonstrate the serious nature of this organism. The source tracking of Cronobacter spp. and the analysis of high-frequency species from different sources are helpful for a more targeted control. Furthermore, the persistence during food processing and storage may be attributed to strong resistance of Cronobacter spp. to environment stresses such as heat, pH, and desiccation. There are many factors that support the survival of Cronobacter spp. in harsh environments, such as some genes, regulatory systems, and biofilms. Advanced detection technology is helpful for the strict monitoring of Cronobacter spp. In addition to the traditional heat treatment, many new control techniques have been developed, and the ability to control Cronobacter spp. has been demonstrated. The control of this bacteria is required not only during manufacture, but also through the selection of packaging methods to reduce postprocessing contamination. At the same time, the effect of inactivation methods on product quality and safety must be considered. This review considers the advances in our understanding of environmental stress response in Cronobacter spp. with special emphasis on its implications in food processing.
Collapse
Affiliation(s)
- Lihan Wang
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin, China, 150030
| | - Stephen J Forsythe
- Foodmicrobe.com, Adams Hill, Keyworth, Nottingham, United Kingdom, NG12 5GY
| | - Xinyan Yang
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin, China, 150030
| | - Shiqian Fu
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin, China, 150030
| | - Chaoxin Man
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin, China, 150030.
| | - Yujun Jiang
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin, China, 150030.
| |
Collapse
|
16
|
Wu J, Li W, Zhao SG, Qian SH, Wang Z, Zhou MJ, Hu WS, Wang J, Hu LX, Liu Y, Xue ZL. Site-directed mutagenesis of the quorum-sensing transcriptional regulator SinR affects the biosynthesis of menaquinone in Bacillus subtilis. Microb Cell Fact 2021; 20:113. [PMID: 34098969 PMCID: PMC8183045 DOI: 10.1186/s12934-021-01603-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 05/31/2021] [Indexed: 01/02/2023] Open
Abstract
Background Menaquinone (MK-7) is a highly valuable vitamin K2 produced by Bacillus subtilis. Common static metabolic engineering approaches for promoting the production of MK-7 have been studied previously. However, these approaches caused an accumulation of toxic substances and reduced product yield. Hence, dynamic regulation by the quorum sensing (QS) system is a promising method for achieving a balance between product synthesis and cell growth. Results In this study, the QS transcriptional regulator SinR, which plays a significant role in biofilm formation and MK production simultaneously, was selected, and its site-directed mutants were constructed. Among these mutants, sinR knock out strain (KO-SinR) increased the biofilm biomass by 2.8-fold compared to the wild-type. SinRquad maximized the yield of MK-7 (102.56 ± 2.84 mg/L). To decipher the mechanism of how this mutant regulates MK-7 synthesis and to find additional potential regulators that enhance MK-7 synthesis, RNA-seq was used to analyze expression changes in the QS system, biofilm formation, and MK-7 synthesis pathway. The results showed that the expressions of tapA, tasA and epsE were up-regulated 9.79-, 0.95-, and 4.42-fold, respectively. Therefore, SinRquad formed more wrinkly and smoother biofilms than BS168. The upregulated expressions of glpF, glpk, and glpD in this biofilm morphology facilitated the flow of glycerol through the biofilm. In addition, NADH dehydrogenases especially sdhA, sdhB, sdhC and glpD, increased 1.01-, 3.93-, 1.87-, and 1.11-fold, respectively. The increased expression levels of NADH dehydrogenases indicated that more electrons were produced for the electron transport system. Electrical hyperpolarization stimulated the synthesis of the electron transport chain components, such as cytochrome c and MK, to ensure the efficiency of electron transfer. Wrinkly and smooth biofilms formed a network of interconnected channels with a low resistance to liquid flow, which was beneficial for the uptake of glycerol, and facilitated the metabolic flux of four modules of the MK-7 synthesis pathway. Conclusions In this study, we report for the first time that SinRquad has significant effects on MK-7 synthesis by forming wrinkly and smooth biofilms, upregulating the expression level of most NADH dehydrogenases, and providing higher membrane potential to stimulate the accumulation of the components in the electron transport system. Supplementary Information The online version contains supplementary material available at 10.1186/s12934-021-01603-5.
Collapse
Affiliation(s)
- Jing Wu
- College of Biology and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, China
| | - Wei Li
- College of Biology and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, China
| | - Shi-Guang Zhao
- College of Biology and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, China.,Anhui Engineering Laboratory for Industrial Microbiology Molecular Breeding, Wuhu, 241000, China
| | - Sen-He Qian
- College of Biology and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, China.,Anhui Engineering Laboratory for Industrial Microbiology Molecular Breeding, Wuhu, 241000, China
| | - Zhou Wang
- College of Biology and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, China.,Anhui Engineering Laboratory for Industrial Microbiology Molecular Breeding, Wuhu, 241000, China
| | - Meng-Jie Zhou
- College of Biology and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, China
| | - Wen-Song Hu
- College of Biology and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, China
| | - Jian Wang
- College of Biology and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, China
| | - Liu-Xiu Hu
- College of Biology and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, China.,Wuhu Zhanghengchun Medicine CO., LTD, Wuhu, 241000, China
| | - Yan Liu
- College of Biology and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, China. .,Anhui Engineering Laboratory for Industrial Microbiology Molecular Breeding, Wuhu, 241000, China.
| | - Zheng-Lian Xue
- College of Biology and Food Engineering, Anhui Polytechnic University, Wuhu, 241000, China. .,Anhui Engineering Laboratory for Industrial Microbiology Molecular Breeding, Wuhu, 241000, China.
| |
Collapse
|
17
|
Liu D, Wang Y, Wang X, Ou D, Ling N, Zhang J, Wu Q, Ye Y. Role of the multiple efflux pump protein TolC on growth, morphology, and biofilm formation under nitric oxide stress in Cronobacter malonaticus. JDS COMMUNICATIONS 2021; 2:98-103. [PMID: 36339506 PMCID: PMC9623651 DOI: 10.3168/jdsc.2020-0040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 01/19/2021] [Indexed: 06/13/2023]
Abstract
Nitric oxide (NO) is a biological signal molecule that can control and prevent the growth of most pathogens. Cronobacter species are a group of gram-negative foodborne pathogens that cause severe diseases, including neonatal meningitis, septicemia, and necrotizing enterocolitis, especially among newborns and infants consuming contaminated powdered infant formula. Cronobacter species might be tolerant to NO, resulting in severe infections. However, the specific mechanism of tolerance to NO in Cronobacter species is unclear. Here, we explore the effects of a key component, the protein TolC, of a multiple efflux pump on the growth, morphological changes, and biofilm formation of Cronobacter malonaticus under NO stress. We found that deletion of tolC resulted in a decreased growth rate under 100 mM sodium nitroprusside (NO donor) and led to more disruptive morphological injury to the bacterial cells. Furthermore, C. malonaticus lacking the TolC protein (ΔtolC mutant) showed weaker biofilm formation than the wild-type strain under normal or NO stress conditions. We have proved that TolC plays an important role in cell growth and biofilm formation of C. malonaticus. Therefore, our results may provide valuable theoretical basis for formulating clinical guidelines for treatment of disease caused by C. malonaticus and ensuring food safety.
Collapse
Affiliation(s)
- Dengyu Liu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Yaping Wang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Xin Wang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Dexin Ou
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Na Ling
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| | - Jumei Zhang
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| | - Qingping Wu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| | - Yingwang Ye
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| |
Collapse
|
18
|
RNA-seq-based transcriptomic comparison of Saccharomyces cerevisiae during spontaneous and inoculated fermentations of organic and conventional grapes. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.111183] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
19
|
Ji X, Lu P, Xue J, Zhao N, Zhang Y, Dong L, Zhang X, Li P, Hu Y, Wang J, Zhang B, Liu J, Lv H, Wang S. The lipoprotein NlpD in Cronobacter sakazakii responds to acid stress and regulates macrophage resistance and virulence by maintaining membrane integrity. Virulence 2021; 12:415-429. [PMID: 33459158 PMCID: PMC7834084 DOI: 10.1080/21505594.2020.1870336] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Cronobacter sakazakii, an emerging opportunistic pathogen, is implicated in severe foodborne outbreak infections in premature and full-term infants. Generally, acid tolerance is vital for the pathogenesis of foodborne pathogens; however, its role in C. sakazakii virulence remains largely unknown. To screen out acid-tolerance determinants from transposon mutants, anovel counterselection method using gentamicin and acid was developed. Using the counterselection method and growth assay, we screened several acid-sensitive mutants and found that nlpD encodes an acid-resistance factor in C. sakazakii. Compared to the wild-type strain, the nlpD mutant exhibited attenuated virulence in a rat model. Using macrophage THP-1 cells and a pH probe, we verified that nlpD enables bacteria to resist macrophages by resisting acidification. Finally, we confirmed that nlpD maintains C. sakazakii membrane integrity in acid using propidium iodide permeabilization assays via flow cytometry. Our results confirm that nlpD is a novel virulence factor that permits C. sakazakii to survive under acid stress conditions. Considering that NlpD is a conserved lipoprotein located in the bacterial outer membrane, NlpD could be used as a target for drug development.
Collapse
Affiliation(s)
- Xuemeng Ji
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University , Tianjin, China
| | - Ping Lu
- Institute of Radiation Medicine, Chinese Academy of Medical Science and Peking Union Medical Collage , Tianjin, China
| | - Juan Xue
- Institute of Infection and Immunity, Taihe Hospital, Hubei University of Medicine , Shiyan, China
| | - Ning Zhao
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University , Tianjin, China
| | - Yan Zhang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University , Tianjin, China
| | - Lu Dong
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University , Tianjin, China
| | - Xuejiao Zhang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University , Tianjin, China
| | - Ping Li
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology , Tianjin, China
| | - Yaozhong Hu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University , Tianjin, China
| | - Jin Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University , Tianjin, China
| | - Bowei Zhang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University , Tianjin, China
| | - Jingmin Liu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University , Tianjin, China
| | - Huan Lv
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University , Tianjin, China
| | - Shuo Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University , Tianjin, China
| |
Collapse
|