1
|
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]
|
2
|
E J, Chen J, Chen Z, Ma R, Zhang J, Yao C, Wang R, Zhang Q, Yang Y, Li J, Wang J. Effects of different initial pH values on freeze-drying resistance of Lactiplantibacillus plantarum LIP-1 based on transcriptomics and proteomics. Food Res Int 2021; 149:110694. [PMID: 34600689 DOI: 10.1016/j.foodres.2021.110694] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 08/15/2021] [Accepted: 08/31/2021] [Indexed: 12/21/2022]
Abstract
The growth and the resistance to adverse environments of lactic acid bacteria would be affected by adjusting the initial pH of the medium. In order to explore the effect of changing the initial pH of culture medium on the freeze-drying survival rate of the Lactiplantibacillus plantarum LIP-1, the effect of initial pH on cell membrane fatty acid composition and key enzyme activity were mainly determined, and the internal mechanism was studied by transcriptomics and proteomics methods. We found that compared with initial pH 7.4 group, initial pH 6.8 group could improve the freeze-drying survival rate of the L. plantarum LIP-1. It was possibly due to the lactate dehydrogenase (LDH) was upregulated in the initial pH6.8 group, which led to a rapid decrease in culture pH. To reduce the inhibitory effect of long-term acid environment on growth, the strain upregulated the expression of fatty acid synthesis-related genes and proteins, promoted the relative content of cyclopropane and unsaturated fatty acids, improved integrity of the cell membranes. The adjustment of fatty acid composition maintained the integrity of the cell membrane in a freeze-drying environment to improve the freeze-drying survival rate of the initial pH6.8 group. In addition, the long-term acid environment stimulated a cross-stress tolerance mechanism that significantly upregulated the expression of a cold stress protein. The results indicated that the optimal initial pH of the medium could improve the ability of L. plantarum LIP-1 to resist freeze-drying.
Collapse
Affiliation(s)
- Jingjing E
- Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of P. R. China, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China; Key Laboratory of Dairy Products Processing, Ministry of Agriculture, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China
| | - Jing Chen
- Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of P. R. China, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China; Key Laboratory of Dairy Products Processing, Ministry of Agriculture, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China
| | - Zichao Chen
- Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of P. R. China, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China; Key Laboratory of Dairy Products Processing, Ministry of Agriculture, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China
| | - Rongze Ma
- Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of P. R. China, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China; Key Laboratory of Dairy Products Processing, Ministry of Agriculture, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China
| | - Jingya Zhang
- Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of P. R. China, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China; Key Laboratory of Dairy Products Processing, Ministry of Agriculture, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China
| | - Caiqing Yao
- Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of P. R. China, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China; Key Laboratory of Dairy Products Processing, Ministry of Agriculture, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China
| | - Ruixue Wang
- Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of P. R. China, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China; Key Laboratory of Dairy Products Processing, Ministry of Agriculture, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China
| | - Qiaoling Zhang
- Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of P. R. China, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China; Key Laboratory of Dairy Products Processing, Ministry of Agriculture, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China
| | - Ying Yang
- Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of P. R. China, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China; Key Laboratory of Dairy Products Processing, Ministry of Agriculture, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China
| | - Jing Li
- Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of P. R. China, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China; Key Laboratory of Dairy Products Processing, Ministry of Agriculture, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China
| | - Junguo Wang
- Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of P. R. China, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China; Key Laboratory of Dairy Products Processing, Ministry of Agriculture, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China
| |
Collapse
|
3
|
Zhou X, Xuan D, Hu S, Du J, Pu J, Jin D, Zhao F, Yin F, Cui X, Huang Y, Wang G, Wu Q, Lu G, Niu L. Pelistega ratti sp. nov. from Rattus norvegicus of Hainan island. Int J Syst Evol Microbiol 2021; 71. [PMID: 33688803 DOI: 10.1099/ijsem.0.004733] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Two strains (NLN63T and NLN82) of Gram-stain-negative, oxidase- and catalase-positive, bacilli-shaped organisms were isolated from the faecal samples of two separate Rattus norvegicus in Baisha county of Hainan Province, Southern PR China. Phylogenetic analysis based on the near full-length 16S rRNA sequences revealed that strain NLN63T belongs to the genus Pelistega, having maximum similarity to Pelistega suis CCUG 64465T (97.1 %), Pelistega europaea CCUG 39967T (96.2 %) and Pelistega indica DSM 27484T (96.2 %), respectively. The phylogenomic tree built on 553 core genes from genomes of 20 species in the genus Pelistega and other adjacent genera further confirmed that strains NLN63T and NLN82 form a distinct subline and exhibit specific phylogenetic affinity with P. europaea CCUG 39967T. In digital DNA-DNA hybridization analyses, strain NLN63T showed low estimated DNA reassociation values (21.4-22.6 %) with the type strains of the species in the genus Pelistega. The DNA G+C contents of strains NLN63T and NLN82 were 37.3 and 37.1 mol%, respectively. Strain NLN63T had a unique MALDI-TOF MS profile, contained Q-8 as the major quinone and C16 : 0, summed feature 8 (C18 : 1 ω7c/C18 : 1 ω6c or both) and summed feature 3 (C16 : 1 ω7c/C16 : 1 ω6c or both) as the dominant fatty acids. Based upon these polyphasic characterization data obtained from the present study, a novel species of the genus Pelistega, Pelistega ratti sp. nov., is proposed with NLN63T (=GDMCC 1.1697T=JCM 33788T) as the type strain.
Collapse
Affiliation(s)
- Xiaojun Zhou
- Hainan Medical University-The University of Hong Kong Joint Laboratory of Tropical Infectious Diseases, Hainan Medical University, Haikou, Hainan, PR China.,Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Medical University, Haikou, 571199, PR China.,Department of Pathogen Biology, Hainan Medical University, Haikou, Hainan, PR China.,Clinical laboratory department of Hainan General Hospital, Haikou, 570311, PR China
| | - Duanduan Xuan
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Medical University, Haikou, 571199, PR China.,Department of Pathogen Biology, Hainan Medical University, Haikou, Hainan, PR China.,Hainan Medical University-The University of Hong Kong Joint Laboratory of Tropical Infectious Diseases, Hainan Medical University, Haikou, Hainan, PR China
| | - Shoukui Hu
- Peking University shougang hospital, Beijing, 100144, PR China
| | - Jiang Du
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Medical University, Haikou, 571199, PR China.,Department of Pathogen Biology, Hainan Medical University, Haikou, Hainan, PR China.,Hainan Medical University-The University of Hong Kong Joint Laboratory of Tropical Infectious Diseases, Hainan Medical University, Haikou, Hainan, PR China
| | - Ji Pu
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, PR China
| | - Dong Jin
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, PR China
| | - Fan Zhao
- Peking University shougang hospital, Beijing, 100144, PR China
| | - Feifei Yin
- Department of Pathogen Biology, Hainan Medical University, Haikou, Hainan, PR China.,Hainan Medical University-The University of Hong Kong Joint Laboratory of Tropical Infectious Diseases, Hainan Medical University, Haikou, Hainan, PR China.,Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Medical University, Haikou, 571199, PR China
| | - Xiuji Cui
- Department of Pathogen Biology, Hainan Medical University, Haikou, Hainan, PR China.,Hainan Medical University-The University of Hong Kong Joint Laboratory of Tropical Infectious Diseases, Hainan Medical University, Haikou, Hainan, PR China.,Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Medical University, Haikou, 571199, PR China
| | - Yi Huang
- Department of Pathogen Biology, Hainan Medical University, Haikou, Hainan, PR China.,Hainan Medical University-The University of Hong Kong Joint Laboratory of Tropical Infectious Diseases, Hainan Medical University, Haikou, Hainan, PR China.,Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Medical University, Haikou, 571199, PR China
| | - Gaoyu Wang
- Department of Pathogen Biology, Hainan Medical University, Haikou, Hainan, PR China.,Hainan Medical University-The University of Hong Kong Joint Laboratory of Tropical Infectious Diseases, Hainan Medical University, Haikou, Hainan, PR China.,Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Medical University, Haikou, 571199, PR China
| | - Qiang Wu
- Department of Pathogen Biology, Hainan Medical University, Haikou, Hainan, PR China.,Hainan Medical University-The University of Hong Kong Joint Laboratory of Tropical Infectious Diseases, Hainan Medical University, Haikou, Hainan, PR China.,Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Medical University, Haikou, 571199, PR China
| | - Gang Lu
- Department of Pathogen Biology, Hainan Medical University, Haikou, Hainan, PR China.,Hainan Medical University-The University of Hong Kong Joint Laboratory of Tropical Infectious Diseases, Hainan Medical University, Haikou, Hainan, PR China.,Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Medical University, Haikou, 571199, PR China
| | - Lina Niu
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Medical University, Haikou, 571199, PR China.,Department of Pathogen Biology, Hainan Medical University, Haikou, Hainan, PR China.,Hainan Medical University-The University of Hong Kong Joint Laboratory of Tropical Infectious Diseases, Hainan Medical University, Haikou, Hainan, PR China
| |
Collapse
|
4
|
Gao X, Liu W, Mei J, Xie J. Quantitative Analysis of Cold Stress Inducing Lipidomic Changes in Shewanella putrefaciens Using UHPLC-ESI-MS/MS. Molecules 2019; 24:E4609. [PMID: 31888284 PMCID: PMC6943694 DOI: 10.3390/molecules24244609] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 12/08/2019] [Accepted: 12/13/2019] [Indexed: 02/06/2023] Open
Abstract
Shewanella putrefaciens is a well-known specific spoilage organism (SSO) and cold-tolerant microorganism in refrigerated fresh marine fish. Cold-adapted mechanism includes increased fluidity of lipid membranes by the ability to finely adjust lipids composition. In the present study, the lipid profile of S. putrefaciens cultivated at 30, 20, 10, 4, and 0 °C was explored using ultra-high-pressure liquid chromatography/electrospray ionization tandem mass spectrometry (UHPLC-ESI-MS/MS) to discuss the effect of lipid composition on cold-adapted tolerance. Lipidomic analysis detected a total of 27 lipid classes and 606 lipid molecular species in S. putrefaciens cultivated at 30, 20, 10, 4, and 0 °C. S. putrefaciens cultivated at 30 °C (SP-30) had significantly higher content of glycerolipids, sphingolipids, saccharolipids, and fatty acids compared with that at 0 °C (SP-0); however, the lower content of phospholipids (13.97%) was also found in SP-30. PE (30:0), PE (15:0/15:0), PE (31:0), PA (33:1), PE (32:1), PE (33:1), PE (25:0), PC (22:0), PE (29:0), PE (34:1), dMePE (15:0/16:1), PE (31:1), dMePE (15:1/15:0), PG (34:2), and PC (11:0/11:0) were identified as the most abundant lipid molecular species in S. putrefaciens cultivated at 30, 20, 10, 4, and 0 °C. The increase of PG content contributes to the construction of membrane lipid bilayer and successfully maintains membrane integrity under cold stress. S. putrefaciens cultivated at low temperature significantly increased the total unsaturated liquid contents but decreased the content of saturated liquid contents.
Collapse
Affiliation(s)
- Xin Gao
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; (X.G.); (W.L.)
- National Experimental Teaching Demonstration Center for Food Science Engineering, Shanghai Ocean University, Shanghai 201306, China
- Shanghai Engineering Research Center of Aquatic Product Processing and Preservation, Shanghai 201306, China
- Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China
- School of Health and Social Care, Shanghai Urban Construction Vocational College, Shanghai 201415, China
| | - Wenru Liu
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; (X.G.); (W.L.)
- National Experimental Teaching Demonstration Center for Food Science Engineering, Shanghai Ocean University, Shanghai 201306, China
- Shanghai Engineering Research Center of Aquatic Product Processing and Preservation, Shanghai 201306, China
- Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China
| | - Jun Mei
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; (X.G.); (W.L.)
- National Experimental Teaching Demonstration Center for Food Science Engineering, Shanghai Ocean University, Shanghai 201306, China
- Shanghai Engineering Research Center of Aquatic Product Processing and Preservation, Shanghai 201306, China
- Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China
| | - Jing Xie
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; (X.G.); (W.L.)
- National Experimental Teaching Demonstration Center for Food Science Engineering, Shanghai Ocean University, Shanghai 201306, China
- Shanghai Engineering Research Center of Aquatic Product Processing and Preservation, Shanghai 201306, China
- Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China
| |
Collapse
|
5
|
Taylor MD, Bräunig J, Mueller JF, Crompton M, Dunstan RH, Nilsson S. Metabolomic profiles associated with exposure to per- and polyfluoroalkyl substances (PFASs) in aquatic environments. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2019; 21:1980-1990. [PMID: 31553340 DOI: 10.1039/c9em00394k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Per- and polyfluoroalkyl substances (PFASs) are frequently detected in aquatic environments. Longer chained perfluoroalkyl acids (PFAAs), in particular, have been found to bioaccumulate in a broad range of aquatic biota. PFAAs have a physiochemical similarity to naturally occurring fatty acids and could potentially disrupt metabolic processes, however, there has been limited study in this area, especially in aquatic species. In this study, the associations between PFAAs and metabolite profiles were investigated in crustaceans. Eastern School Prawn (Metapenaeus macleayi) were obtained from three different locations (n = 15 per location) with similar environmental conditions but different levels of PFAA contamination. The concentrations of PFAAs, fatty acids and amino acids were analysed and differences in PFAA and metabolite profiles were evaluated. Different PFAA profiles were mirrored by significant differences in the composition of both fatty acid and amino acid profiles, indicating a potential association between PFAA concentration and the composition of metabolites in prawns. These results highlight a need for further research investigating the impacts of PFAA exposure, with the current study providing a foundation for further investigation of the relationship between PFAA bioaccumulation and organism metabolism.
Collapse
Affiliation(s)
- Matthew D Taylor
- Port Stephens Fisheries Institute, New South Wales Department of Primary Industries, Locked Bag 1, Nelson Bay, NSW 2315, Australia. and The University of Queensland, Queensland Alliance for Environmental Health Sciences, 20 Cornwall Street, Woolloongabba, QLD 4102, Australia and School of Environmental and Life Sciences, University of Newcastle, New South Wales 2308, Australia
| | - Jennifer Bräunig
- The University of Queensland, Queensland Alliance for Environmental Health Sciences, 20 Cornwall Street, Woolloongabba, QLD 4102, Australia
| | - Jochen F Mueller
- The University of Queensland, Queensland Alliance for Environmental Health Sciences, 20 Cornwall Street, Woolloongabba, QLD 4102, Australia
| | - Marcus Crompton
- School of Environmental and Life Sciences, University of Newcastle, New South Wales 2308, Australia
| | - R Hugh Dunstan
- School of Environmental and Life Sciences, University of Newcastle, New South Wales 2308, Australia
| | - Sandra Nilsson
- The University of Queensland, Queensland Alliance for Environmental Health Sciences, 20 Cornwall Street, Woolloongabba, QLD 4102, Australia
| |
Collapse
|
6
|
Comprehensive Evaluation of Parameters Affecting One-Step Method for Quantitative Analysis of Fatty Acids in Meat. Metabolites 2019; 9:metabo9090189. [PMID: 31540389 PMCID: PMC6780067 DOI: 10.3390/metabo9090189] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 09/03/2019] [Accepted: 09/10/2019] [Indexed: 01/04/2023] Open
Abstract
Despite various direct transmethylation methods having been published and applied to analysis of meat fatty acid (FA) composition, there are still conflicting ideas about the best method for overcoming all the difficulties posed by analysis of complex mixtures of FA in meat. This study performed a systematic investigation of factors affecting a one-step method for quantitative analysis of fatty acids in freeze-dried animal tissue. Approximately 280 reactions, selected using factorial design, were performed to investigate the effect of temperature, reaction time, acid concentration, solvent volume, sample weight and sample moisture. The reaction yield for different types of fatty acids, including saturated, unsaturated (cis, trans and conjugated) and long-chain polyunsaturated fatty acids was determined. The optimised condition for one-step transmethylation was attained with four millilitres 5% sulfuric acid in methanol (as acid catalyst), four millilitres toluene (as co-solvent), 300 mg of freeze-dried meat and incubation at 70 °C for 2 h, with interim mixing by inversion at 30, 60 and 90 min for 15 s. The optimised condition was applied to meat samples from different species, covering a broad range of fat content and offers a simplified and reliable method for analysis of fatty acids from meat samples.
Collapse
|
7
|
Zhu L, Zhang Y, He P, Zhang Y, Wang Q. A multiplex PCR amplification strategy coupled with microchip electrophoresis for simultaneous and sensitive detection of three foodborne bacteria. J Chromatogr B Analyt Technol Biomed Life Sci 2018; 1093-1094:141-146. [DOI: 10.1016/j.jchromb.2018.06.057] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 06/27/2018] [Accepted: 06/29/2018] [Indexed: 01/11/2023]
|