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Pang Y, Wu R, Cui T, Zhang Z, Dong L, Chen F, Hu X. Proteomic Response of Bacillus subtilis Spores under High Pressure Combined with Moderate Temperature and Random Peptide Mixture LK Treatment. Foods 2022; 11:foods11081123. [PMID: 35454710 PMCID: PMC9030791 DOI: 10.3390/foods11081123] [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: 03/04/2022] [Revised: 03/31/2022] [Accepted: 04/08/2022] [Indexed: 11/20/2022] Open
Abstract
In this study, a method of Bacillus subtilis spore inactivation under high pressure (P, 200 MPa) combined with moderate temperature (T, 80 °C) and the addition of antimicrobial peptide LK (102 μg/mL) was investigated. Spores presented cortex hydrolysis and inner membrane (IM) damage with an 8.16 log reduction in response to treatment with PT-LK, as observed by phase-contrast and inverted fluorescence microscopy and flow cytometry (FCM) analysis. Furthermore, a tandem mass tag (TMT) quantitative proteomics approach was utilized because Liquid chromatography-tandem mass spectrometry (LC–MS/MS) analysis data were used. After treatment with PT-LK, 17,017 polypeptides and 3166 proteins were detected from B. subtilis spores. Among them, 78 proteins showed significant differences in abundance between the PT-LK-treated and control groups, with 49 proteins being upregulated and 29 proteins being downregulated in the PT-LK-treated group. Genetic information processing, metabolism, cellular process, and environmental information processing were the main mechanisms of PT-LK-mediated spore inactivation.
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Affiliation(s)
- Yaru Pang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (Y.P.); (R.W.); (T.C.); (Z.Z.); (L.D.); (F.C.)
- China National Engineering Research Center for Fruit and Vegetable Processing, Beijing 100083, China
- Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Beijing 100083, China
- Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, Beijing 100083, China
| | - Ruobin Wu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (Y.P.); (R.W.); (T.C.); (Z.Z.); (L.D.); (F.C.)
- China National Engineering Research Center for Fruit and Vegetable Processing, Beijing 100083, China
- Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Beijing 100083, China
- Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, Beijing 100083, China
| | - Tianlin Cui
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (Y.P.); (R.W.); (T.C.); (Z.Z.); (L.D.); (F.C.)
- China National Engineering Research Center for Fruit and Vegetable Processing, Beijing 100083, China
- Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Beijing 100083, China
- Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, Beijing 100083, China
| | - Zequn Zhang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (Y.P.); (R.W.); (T.C.); (Z.Z.); (L.D.); (F.C.)
- China National Engineering Research Center for Fruit and Vegetable Processing, Beijing 100083, China
- Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Beijing 100083, China
- Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, Beijing 100083, China
| | - Li Dong
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (Y.P.); (R.W.); (T.C.); (Z.Z.); (L.D.); (F.C.)
- China National Engineering Research Center for Fruit and Vegetable Processing, Beijing 100083, China
- Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Beijing 100083, China
- Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, Beijing 100083, China
| | - Fang Chen
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (Y.P.); (R.W.); (T.C.); (Z.Z.); (L.D.); (F.C.)
- China National Engineering Research Center for Fruit and Vegetable Processing, Beijing 100083, China
- Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Beijing 100083, China
- Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, Beijing 100083, China
| | - Xiaosong Hu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (Y.P.); (R.W.); (T.C.); (Z.Z.); (L.D.); (F.C.)
- China National Engineering Research Center for Fruit and Vegetable Processing, Beijing 100083, China
- Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Beijing 100083, China
- Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, Beijing 100083, China
- Correspondence: ; Tel.: +86-137-0102-6564
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Ma H, Lai B, Zan C, Di X, Zhu X, Wang K. GLO1 Contributes to the Drug Resistance of Escherichia coli Through Inducing PER Type of Extended-Spectrum β-Lactamases. Infect Drug Resist 2022; 15:1573-1586. [PMID: 35414749 PMCID: PMC8995003 DOI: 10.2147/idr.s358578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Accepted: 03/26/2022] [Indexed: 12/16/2022] Open
Abstract
Background Escherichia coli-associated antimicrobial resistance (AMR) issue so far needs urgent considerations. This study aims to screen the potent genes associated with extended-spectrum β-lactamases (ESBLs) in drug-resistant Escherichia coli and elucidate the specific drug-resistant mechanism. Methods Clinical ESBLs-EC samples were obtained based on the microbial identification, and the whole genome was sequenced. In combination with the significantly enriched pathways, several differently expressed genes were screened and verified by RT-PCR. Furthermore, through knocking out glyoxalase 1 (GLO1) gene and transfecting overexpressed plasmids, the potential relationship between GLO1 and ESBLs was then investigated. Lastly, the concentrations of β-lactamases in bacteria and supernatant from different groups were examined by enzyme-linked immunosorbent assay (ELISA). Results After successful isolation and identification of ESBLs-EC, the whole genome and eighteen differential metabolic pathways were analyzed to select differently expressed genes, including add, deoD, guaD, speG, GLO1, VNN1, etc. RT-PCR results showed that there were no differences in these genes between the standard bacteria and susceptible Escherichia coli. Remarkably, the relative levels of four genes including speG, Hdac10, GLO1 and Ppcdc were significantly increased in ESBLs-EC in comparison with susceptible strains, whereas other gene expression was decreased. Further experiments utilizing gene knockout and overexpression strains confirmed the role of GLO1. At last, a total of 10 subtypes of β-lactamases were studied using ELISA, including BES-, CTX-M1-, CTX-M2-, OXA1-, OXA2-, OXA10-, PER-, SHV-, TEM-, and VEB-ESBLs, and results demonstrated that GLO1 gene expression only affected PER-β-lactamases but had no effects on other β-lactamases. Conclusion SpeG, Hdac10, GLO1 and Ppcdc might be associated with the drug-resistant mechanism of Escherichia coli. Of note, this study firstly addressed the role of GLO1 in the drug resistance of ESBLs-EC, and this effect may be mediated by increasing PER-β-lactamases.
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Affiliation(s)
- He Ma
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun, 130042, People’s Republic of China
| | - Bingjie Lai
- Department of Intensive Care Unit, The Second Hospital of Jilin University, Changchun, 130042, People’s Republic of China
| | - Chunfang Zan
- Division of Vascular Biology, Institute for Stroke and Dementia Research (ISD), LMU Klinikum, Ludwig-Maximilians-University (LMU), Munich, 81377, Germany
| | - Xin Di
- Department of Respiratory Medicine, The Second Hospital of Jilin University, Changchun, 130042, People’s Republic of China
| | - Xinran Zhu
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun, 130042, People’s Republic of China
| | - Ke Wang
- Department of Respiratory Medicine, The Second Hospital of Jilin University, Changchun, 130042, People’s Republic of China
- Correspondence: Ke Wang, Department of Respiratory Medicine, The Second Hospital of Jilin University, Changchun, 130042, People’s Republic of China, Email
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Bhat SV, Price JDW, Dahms TES. AFM-Based Correlative Microscopy Illuminates Human Pathogens. Front Cell Infect Microbiol 2021; 11:655501. [PMID: 34026660 PMCID: PMC8138568 DOI: 10.3389/fcimb.2021.655501] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 04/08/2021] [Indexed: 12/25/2022] Open
Abstract
Microbes have an arsenal of virulence factors that contribute to their pathogenicity. A number of challenges remain to fully understand disease transmission, fitness landscape, antimicrobial resistance and host heterogeneity. A variety of tools have been used to address diverse aspects of pathogenicity, from molecular host-pathogen interactions to the mechanisms of disease acquisition and transmission. Current gaps in our knowledge include a more direct understanding of host-pathogen interactions, including signaling at interfaces, and direct phenotypic confirmation of pathogenicity. Correlative microscopy has been gaining traction to address the many challenges currently faced in biomedicine, in particular the combination of optical and atomic force microscopy (AFM). AFM, generates high-resolution surface topographical images, and quantifies mechanical properties at the pN scale under physiologically relevant conditions. When combined with optical microscopy, AFM probes pathogen surfaces and their physical and molecular interaction with host cells, while the various modes of optical microscopy view internal cellular responses of the pathogen and host. Here we review the most recent advances in our understanding of pathogens, recent applications of AFM to the field, how correlative AFM-optical microspectroscopy and microscopy have been used to illuminate pathogenicity and how these methods can reach their full potential for studying host-pathogen interactions.
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Affiliation(s)
- Supriya V Bhat
- Department of Chemistry and Biochemistry, University of Regina, Regina, SK, Canada
| | - Jared D W Price
- Department of Chemistry and Biochemistry, University of Regina, Regina, SK, Canada
| | - Tanya E S Dahms
- Department of Chemistry and Biochemistry, University of Regina, Regina, SK, Canada
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Sun G, Yang M, Jiang L, Huang M. Regulation of pro-σ K activation: a key checkpoint in Bacillus subtilis sporulation. Environ Microbiol 2021; 23:2366-2373. [PMID: 33538382 DOI: 10.1111/1462-2920.15415] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 01/27/2021] [Accepted: 01/28/2021] [Indexed: 11/30/2022]
Abstract
The Gram-positive bacterium Bacillus subtilis initiates the sporulation process under conditions of nutrient limitation. Here, we review related work in this field, focusing on the protein processing of the pro-σK activation. The purpose of this review is to illustrate the mechanism of pro-σK activation and provide structural insights into the regulation of spore production. Sporulation is not only important in basic science but also provides mechanistic insight for bacterial control in applications in, e.g., food industry.
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Affiliation(s)
- Gaohui Sun
- College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350016, China
| | - Moua Yang
- Division of Hemostasis and Thrombosis, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Longguang Jiang
- College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350016, China.,Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou University, Fuzhou, Fujian, 350116, China
| | - Mingdong Huang
- College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350016, China
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