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Chandel P, Thapa K, Kanojia N, Rani L, Singh TG, Rohilla P. Exploring Therapeutic Potential of Phytoconstituents as a Gut Microbiota Modulator in the Management of Neurological and Psychological Disorders. Neuroscience 2024; 551:69-78. [PMID: 38754721 DOI: 10.1016/j.neuroscience.2024.05.002] [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: 02/16/2024] [Accepted: 05/02/2024] [Indexed: 05/18/2024]
Abstract
The functioning of the brain and its impact on behavior, emotions, and cognition can be affected by both neurological and psychiatric disorders that impose a significant burden on global health. Phytochemicals are helpful in the treatment of several neurological and psychological disorders, including anxiety, depression, Huntington's disease (HD), Parkinson's disease (PD), Alzheimer's disease (AD), and autism spectrum disorder (ASD), because they have symptomatic benefits with few adverse reactions. Changes in gut microbiota have been associated with many neurological and psychiatric conditions. This review focuses on the potential efficacy of phytochemicals such as flavonoids, terpenoids, and polyphenols in regulating gut flora and providing symptomatic relief for a range of neurological and psychological conditions. Evidence-based research has shown the medicinal potentials of these phytochemicals, but additional study is required to determine whether altering gut microbiota might slow the advancement of neurological and psychological problems.
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Affiliation(s)
- Prarit Chandel
- Chitkara University, School of Pharmacy, Himachal Pradesh, India
| | - Komal Thapa
- Chitkara University, School of Pharmacy, Himachal Pradesh, India.
| | - Neha Kanojia
- Chitkara University, School of Pharmacy, Himachal Pradesh, India
| | - Lata Rani
- Chitkara University, School of Pharmacy, Himachal Pradesh, India
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Zhu L, Li J, Yang J, Li X, Lin D, Wang M. Fermentation broth from fruit and vegetable waste works: Reducing the risk of human bacterial pathogens in soil by inhibiting quorum sensing. ENVIRONMENT INTERNATIONAL 2024; 188:108753. [PMID: 38761431 DOI: 10.1016/j.envint.2024.108753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 04/06/2024] [Accepted: 05/13/2024] [Indexed: 05/20/2024]
Abstract
Fermentation broth from fruit and vegetable waste (FFVW) has demonstrated remarkable ability as a soil amendment and in reducing antibiotic resistance genes (ARGs) pollution. However, the potential of FFVW to mitigate other microbial contamination such as human bacterial pathogens (HBPs) and virulence factor genes (VFGs), which are closely associated with human health, remains unknown. In this study, metagenomic analysis revealed that FFVW reduced the HBPs with high-risk of ARGs and VFGs including Klebsiella pneumoniae (reduced by 40.4 %), Mycobacterium tuberculosis (reduced by 21.4 %) and Streptococcus pneumoniae (reduced by 38.7 %). Correspondingly, VFG abundance in soil decreased from 3.40 copies/cell to 2.99 copies/cell. Further analysis illustrated that these was mainly attributed to the inhibition of quorum sensing (QS). FFVW reduced the abundance of QS signals, QS synthesis genes such as rpaI and luxS, as well as receptor genes such as rpfC and fusK, resulting in a decreased in risk of ARGs and VFGs. The pure culture experiment revealed that the expression of genes related to QS, VFGs, ARGs and mobile genetic elements (MGEs) were downregulated in Pseudomonas aeruginosa, Staphylococcus aureus, Escherichia coli and K. pneumoniae treated by FFVW, consistent with the result of metagenomic analysis. This study suggested an environmentally friendly approach for controlling soil VFGs/ARGs-carrying HBPs, which is crucial for both soil and human health under the framework of "One Health".
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Affiliation(s)
- Lin Zhu
- Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, Zhejiang, China; Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Jingpeng Li
- Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, Zhejiang, China; Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Jian Yang
- Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, Zhejiang, China; Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Xiaodi Li
- Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, Zhejiang, China; Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Da Lin
- Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, Zhejiang, China; Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Meizhen Wang
- Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, Zhejiang, China; Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China.
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Jiang JH, Cameron DR, Nethercott C, Aires-de-Sousa M, Peleg AY. Virulence attributes of successful methicillin-resistant Staphylococcus aureus lineages. Clin Microbiol Rev 2023; 36:e0014822. [PMID: 37982596 PMCID: PMC10732075 DOI: 10.1128/cmr.00148-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2023] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a leading cause of severe and often fatal infections. MRSA epidemics have occurred in waves, whereby a previously successful lineage has been replaced by a more fit and better adapted lineage. Selection pressures in both hospital and community settings are not uniform across the globe, which has resulted in geographically distinct epidemiology. This review focuses on the mechanisms that trigger the establishment and maintenance of current, dominant MRSA lineages across the globe. While the important role of antibiotic resistance will be mentioned throughout, factors which influence the capacity of S. aureus to colonize and cause disease within a host will be the primary focus of this review. We show that while MRSA possesses a diverse arsenal of toxins including alpha-toxin, the success of a lineage involves more than just producing toxins that damage the host. Success is often attributed to the acquisition or loss of genetic elements involved in colonization and niche adaptation such as the arginine catabolic mobile element, as well as the activity of regulatory systems, and shift metabolism accordingly (e.g., the accessory genome regulator, agr). Understanding exactly how specific MRSA clones cause prolonged epidemics may reveal targets for therapies, whereby both core (e.g., the alpha toxin) and acquired virulence factors (e.g., the Panton-Valentine leukocidin) may be nullified using anti-virulence strategies.
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Affiliation(s)
- Jhih-Hang Jiang
- Department of Microbiology, Infection Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- Department of Infectious Diseases, The Alfred Hospital and Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - David R. Cameron
- Department of Biomedical Research, University of Bern, Bern, Switzerland
| | - Cara Nethercott
- Department of Microbiology, Infection Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Marta Aires-de-Sousa
- Laboratory of Molecular Genetics, Institutode Tecnologia Químicae Biológica António Xavier (ITQB-NOVA), Universidade Nova de Lisboa, Oeiras, Portugal
- Escola Superior de Saúde da Cruz Vermelha Portuguesa-Lisboa (ESSCVP-Lisboa), Lisbon, Portugal
| | - Anton Y. Peleg
- Department of Microbiology, Infection Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- Department of Infectious Diseases, The Alfred Hospital and Central Clinical School, Monash University, Melbourne, Victoria, Australia
- Centre to Impact Antimicrobial Resistance, Monash University, Clayton, Melbourne, Victoria, Australia
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Shang W, Hu Z, Li M, Wang Y, Rao Y, Tan L, Chen J, Huang X, Liu L, Liu H, Guo Z, Peng H, Yang Y, Hu Q, Li S, Hu X, Zou J, Rao X. Optimizing a high-sensitivity NanoLuc-based bioluminescence system for in vivo evaluation of antimicrobial treatment. MLIFE 2023; 2:462-478. [PMID: 38818266 PMCID: PMC10989145 DOI: 10.1002/mlf2.12091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 08/05/2023] [Accepted: 08/28/2023] [Indexed: 06/01/2024]
Abstract
Focal and systemic infections are serious threats to human health. Preclinical models enable the development of new drugs and therapeutic regimens. In vivo, animal bioluminescence (BL) imaging has been used with bacterial reporter strains to evaluate antimicrobial treatment effects. However, high-sensitivity bioluminescent systems are required because of the limited tissue penetration and low brightness of the BL signals of existing approaches. Here, we report that NanoLuc (Nluc) showed better performance than LuxCDABE in bacteria. However, the retention rate of plasmid constructs in bacteria was low. To construct stable Staphylococcus aureus reporter strains, a partner protein enolase (Eno) was identified by screening of S. aureus strain USA300 for fusion expression of Nluc-based luciferases, including Nluc, Teluc, and Antares2. Different substrates, such as hydrofurimazine (HFZ), furimazine (FUR), and diphenylterazine (DTZ), were used to optimize a stable reporter strain/substrate pair for BL imaging. S. aureus USA300/Eno-Antares2/HFZ produced the highest number of photons of orange-red light in vitro and enabled sensitive BL tracking of S. aureus in vivo, with sensitivities of approximately 10 CFU from mouse skin and 750 CFU from mouse kidneys. USA300/Eno-Antares2/HFZ was a powerful combination based on the longitudinal evaluation of the therapeutic efficacy of antibiotics. The optimized S. aureus Eno-Antares2/HFZ pair provides a technological advancement for the in vivo evaluation of antimicrobial treatment.
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Affiliation(s)
- Weilong Shang
- Department of Microbiology, College of Basic Medical Sciences, Key Laboratory of Microbial Engineering Under the Educational Committee in Chongqing Army Medical University (Third Military Medical University) Chongqing China
| | - Zhen Hu
- Department of Microbiology, College of Basic Medical Sciences, Key Laboratory of Microbial Engineering Under the Educational Committee in Chongqing Army Medical University (Third Military Medical University) Chongqing China
| | - Mengyang Li
- Department of Microbiology, School of Medicine Chongqing University Chongqing China
| | - Yuting Wang
- Department of Microbiology, College of Basic Medical Sciences, Key Laboratory of Microbial Engineering Under the Educational Committee in Chongqing Army Medical University (Third Military Medical University) Chongqing China
| | - Yifan Rao
- Department of Emergency Medicine, Xinqiao Hospital Army Medical University (Third Military Medical University) Chongqing China
| | - Li Tan
- Department of Microbiology, College of Basic Medical Sciences, Key Laboratory of Microbial Engineering Under the Educational Committee in Chongqing Army Medical University (Third Military Medical University) Chongqing China
| | - Juan Chen
- Department of Pharmacy, Xinqiao Hospital Army Medical University (Third Military Medical University) Chongqing China
| | - Xiaonan Huang
- Department of Microbiology, College of Basic Medical Sciences, Key Laboratory of Microbial Engineering Under the Educational Committee in Chongqing Army Medical University (Third Military Medical University) Chongqing China
| | - Lu Liu
- Department of Microbiology, School of Medicine Chongqing University Chongqing China
| | - He Liu
- Department of Microbiology, College of Basic Medical Sciences, Key Laboratory of Microbial Engineering Under the Educational Committee in Chongqing Army Medical University (Third Military Medical University) Chongqing China
| | - Zuwen Guo
- Department of Microbiology, College of Basic Medical Sciences, Key Laboratory of Microbial Engineering Under the Educational Committee in Chongqing Army Medical University (Third Military Medical University) Chongqing China
| | - Huagang Peng
- Department of Microbiology, College of Basic Medical Sciences, Key Laboratory of Microbial Engineering Under the Educational Committee in Chongqing Army Medical University (Third Military Medical University) Chongqing China
| | - Yi Yang
- Department of Microbiology, College of Basic Medical Sciences, Key Laboratory of Microbial Engineering Under the Educational Committee in Chongqing Army Medical University (Third Military Medical University) Chongqing China
| | - Qiwen Hu
- Department of Microbiology, College of Basic Medical Sciences, Key Laboratory of Microbial Engineering Under the Educational Committee in Chongqing Army Medical University (Third Military Medical University) Chongqing China
| | - Shu Li
- Department of Microbiology, College of Basic Medical Sciences, Key Laboratory of Microbial Engineering Under the Educational Committee in Chongqing Army Medical University (Third Military Medical University) Chongqing China
| | - Xiaomei Hu
- Department of Microbiology, College of Basic Medical Sciences, Key Laboratory of Microbial Engineering Under the Educational Committee in Chongqing Army Medical University (Third Military Medical University) Chongqing China
| | - Jiao Zou
- Department of Military Cognitive Psychology, School of Psychology Army Medical University (Third Military Medical University) Chongqing China
| | - Xiancai Rao
- Department of Microbiology, College of Basic Medical Sciences, Key Laboratory of Microbial Engineering Under the Educational Committee in Chongqing Army Medical University (Third Military Medical University) Chongqing China
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Rothpan M, Chandra Teja Dadi N, McKay G, Tanzer M, Nguyen D, Hart A, Tabrizian M. Titanium-Dioxide-Nanoparticle-Embedded Polyelectrolyte Multilayer as an Osteoconductive and Antimicrobial Surface Coating. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7026. [PMID: 37959623 PMCID: PMC10649639 DOI: 10.3390/ma16217026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 10/27/2023] [Accepted: 10/31/2023] [Indexed: 11/15/2023]
Abstract
Bioactive surface coatings have retained the attention of researchers and physicians due to their versatility and range of applications in orthopedics, particularly in infection prevention. Antibacterial metal nanoparticles (mNPs) are a promising therapeutic, with vast application opportunities on orthopedic implants. The current research aimed to construct a polyelectrolyte multilayer on a highly porous titanium implant using alternating thin film coatings of chitosan and alginate via the layer-by-layer (LbL) self-assembly technique, along with the incorporation of silver nanoparticles (AgNPs) or titanium dioxide nanoparticles (TiO2NPs), for antibacterial and osteoconductive activity. These mNPs were characterized for their physicochemical properties using quartz crystal microgravimetry with a dissipation system, nanoparticle tracking analysis, scanning electron microscopy, and atomic force microscopy. Their cytotoxicity and osteogenic differentiation capabilities were assessed using AlamarBlue and alkaline phosphatase (ALP) activity assays, respectively. The antibiofilm efficacy of the mNPs was tested against Staphylococcus aureus. The LbL polyelectrolyte coating was successfully applied to the porous titanium substrate. A dose-dependent relationship between nanoparticle concentration and ALP as well as antibacterial effects was observed. TiO2NP samples were also less cytotoxic than their AgNP counterparts, although similarly antimicrobial. Together, these data serve as a proof-of-concept for a novel coating approach for orthopedic implants with antimicrobial and osteoconductive properties.
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Affiliation(s)
- Matthew Rothpan
- Department of Biomedical Engineering, Faculty of Medicine and Health Sciences, McGill University, Montreal, QC H3A 2B6, Canada;
| | - Nitin Chandra Teja Dadi
- Jo Miller Orthopaedic Research Laboratory, Division of Orthopaedic Surgery, McGill University, Montreal, QC H3G 1A4, Canada; (N.C.T.D.); (M.T.)
| | - Geoffrey McKay
- Meakins-Christie Laboratories, Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada; (G.M.); (D.N.)
| | - Michael Tanzer
- Jo Miller Orthopaedic Research Laboratory, Division of Orthopaedic Surgery, McGill University, Montreal, QC H3G 1A4, Canada; (N.C.T.D.); (M.T.)
| | - Dao Nguyen
- Meakins-Christie Laboratories, Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada; (G.M.); (D.N.)
- Department of Microbiology and Immunology, McGill University, Montreal, QC H3A OG4, Canada
- Department of Medicine, McGill University, Montreal, QC H4A 3J1, Canada
| | - Adam Hart
- Jo Miller Orthopaedic Research Laboratory, Division of Orthopaedic Surgery, McGill University, Montreal, QC H3G 1A4, Canada; (N.C.T.D.); (M.T.)
| | - Maryam Tabrizian
- Department of Biomedical Engineering, Faculty of Medicine and Health Sciences, McGill University, Montreal, QC H3A 2B6, Canada;
- Faculty of Dentistry and Oral Health Sciences, McGill University, 3640 Rue University, Montreal, QC H3A 0C7, Canada
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Chen J, Lv Y, Shang W, Yang Y, Wang Y, Hu Z, Huang X, Zhang R, Yuan J, Huang J, Rao X. Loaded delta-hemolysin shapes the properties of Staphylococcus aureus membrane vesicles. Front Microbiol 2023; 14:1254367. [PMID: 37869662 PMCID: PMC10588482 DOI: 10.3389/fmicb.2023.1254367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 09/05/2023] [Indexed: 10/24/2023] Open
Abstract
Background Membrane vesicles (MVs) are nanoscale vesicular structures produced by bacteria during their growth in vitro and in vivo. Some bacterial components can be loaded in bacterial MVs, but the roles of the loaded MV molecules are unclear. Methods MVs of Staphylococcus aureus RN4220 and its derivatives were prepared. Dynamic light scattering analysis was used to evaluate the size distribution, and 4D-label-free liquid chromatography-tandem mass spectrometry analysis was performed to detect protein composition in the MVs. The site-mutation S. aureus RN4220-Δhld and agrA deletion mutant RN4220-ΔagrA were generated via allelic replacement strategies. A hemolysis assay was performed with rabbit red blood cells. CCK-8 and lactate dehydrogenase release assays were used to determine the cytotoxicity of S. aureus MVs against RAW264.7 macrophages. The serum levels of inflammatory factors such as IL-6, IL-1β, and TNFα in mice treated with S. aureus MVs were detected with an enzyme-linked immunosorbent assay kit. Results Delta-hemolysin (Hld) was identified as a major loaded factor in S. aureus MVs. Further study showed that Hld could promote the production of staphylococcal MVs with smaller sizes. Loaded Hld affected the diversity of loaded proteins in MVs of S. aureus RN4220. Hld resulted in decreased protein diversity in MVs of S. aureus. Site-mutation (RN4220-Δhld) and agrA deletion (RN4220-ΔagrA) mutants produced MVs (ΔhldMVs and ΔagrAMVs) with a greater number of bacterial proteins than those derived from wild-type RN4220 (wtMVs). Moreover, Hld contributed to the hemolytic activity of wtMVs. Hld-loaded wtMVs were cytotoxic to macrophage RAW264.7 cells and could stimulate the production of inflammatory factor IL-6 in vivo. Conclusion This study presented that Hld was a major loaded factor in S. aureus MVs, and the loaded Hld played vital roles in the MV-property modification.
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Affiliation(s)
- Juan Chen
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Yuhuan Lv
- Department of Microbiology, College of Basic Medical Science, Army Medical University, Chongqing, China
- Department of Clinical Laboratory, The 971st Hospital of Chinese People's Liberation Army Navy, Qingdao, China
| | - Weilong Shang
- Department of Microbiology, College of Basic Medical Science, Army Medical University, Chongqing, China
| | - Yi Yang
- Department of Microbiology, College of Basic Medical Science, Army Medical University, Chongqing, China
| | - Yuting Wang
- Department of Microbiology, College of Basic Medical Science, Army Medical University, Chongqing, China
| | - Zhen Hu
- Department of Microbiology, College of Basic Medical Science, Army Medical University, Chongqing, China
| | - Xiaonan Huang
- Department of Microbiology, College of Basic Medical Science, Army Medical University, Chongqing, China
| | - Rong Zhang
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Jizhen Yuan
- Department of Clinical Laboratory, The 971st Hospital of Chinese People's Liberation Army Navy, Qingdao, China
| | - Jingbin Huang
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Xiancai Rao
- Department of Microbiology, College of Basic Medical Science, Army Medical University, Chongqing, China
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Cosetta CM, Niccum B, Kamkari N, Dente M, Podniesinski M, Wolfe BE. Bacterial-fungal interactions promote parallel evolution of global transcriptional regulators in a widespread Staphylococcus species. THE ISME JOURNAL 2023; 17:1504-1516. [PMID: 37524910 PMCID: PMC10432416 DOI: 10.1038/s41396-023-01462-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 06/06/2023] [Accepted: 06/15/2023] [Indexed: 08/02/2023]
Abstract
Experimental studies of microbial evolution have largely focused on monocultures of model organisms, but most microbes live in communities where interactions with other species may impact rates and modes of evolution. Using the cheese rind model microbial community, we determined how species interactions shape the evolution of the widespread food- and animal-associated bacterium Staphylococcus xylosus. We evolved S. xylosus for 450 generations alone or in co-culture with one of three microbes: the yeast Debaryomyces hansenii, the bacterium Brevibacterium aurantiacum, and the mold Penicillium solitum. We used the frequency of colony morphology mutants (pigment and colony texture phenotypes) and whole-genome sequencing of isolates to quantify phenotypic and genomic evolution. The yeast D. hansenii strongly promoted diversification of S. xylosus. By the end of the experiment, all populations co-cultured with the yeast were dominated by pigment and colony morphology mutant phenotypes. Populations of S. xylosus grown alone, with B. aurantiacum, or with P. solitum did not evolve novel phenotypic diversity. Whole-genome sequencing of individual mutant isolates across all four treatments identified numerous unique mutations in the operons for the SigB, Agr, and WalRK global regulators, but only in the D. hansenii treatment. Phenotyping and RNA-seq experiments highlighted altered pigment and biofilm production, spreading, stress tolerance, and metabolism of S. xylosus mutants. Fitness experiments revealed antagonistic pleiotropy, where beneficial mutations that evolved in the presence of the yeast had strong negative fitness effects in other biotic environments. This work demonstrates that bacterial-fungal interactions can have long-term evolutionary consequences within multispecies microbiomes by facilitating the evolution of strain diversity.
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Affiliation(s)
- Casey M Cosetta
- Department of Biology, Tufts University, Medford, MA, 02155, USA
| | - Brittany Niccum
- Department of Biology, Tufts University, Medford, MA, 02155, USA
| | - Nick Kamkari
- Department of Biology, Tufts University, Medford, MA, 02155, USA
| | - Michael Dente
- Department of Biology, Tufts University, Medford, MA, 02155, USA
| | | | - Benjamin E Wolfe
- Department of Biology, Tufts University, Medford, MA, 02155, USA.
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Fang F, Xu H, Chai B, Li D, Nie L, Wen Z, Yu Z, Zheng J, Zhang H. Neobavaisoflavone Inhibits Biofilm Formation and α-Toxin Activity of Staphylococcus aureus. Curr Microbiol 2023; 80:258. [PMID: 37358668 DOI: 10.1007/s00284-023-03355-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 05/29/2023] [Indexed: 06/27/2023]
Abstract
Neobavaisoflavone had antimicrobial activities against Gram-positive multidrug-resistant (MDR) bacteria, but the effect of neobavaisoflavone on the virulence and biofilm formation of S. aureus has not been explored. The present study aimed to investigate the possible inhibitory effect of neobavaisoflavone on the biofilm formation and α-toxin activity of S. aureus. Neobavaisoflavone presented strong inhibitory effect on the biofilm formation and α-toxin activity of both methicillin-sensitive S. aureus (MSSA) and methicillin-resistant S. aureus (MRSA) strains at 25 µM, but did not affect the growth of S. aureus planktonic cells. Genetic mutations were identified in four coding genes, including cell wall metabolism sensor histidine kinase walK, RNA polymerase sigma factor rpoD, tetR family transcriptional regulator, and a hypothetical protein. The mutation of WalK (K570E) protein was identified and verified in all the neobavaisoflavone-induced mutant S. aureus isolates. The ASN501, LYS504, ILE544 and GLY565 of WalK protein act as hydrogen acceptors to form four hydrogen bonds with neobavaisoflavone by molecular docking analysis, and TRY505 of WalK protein contact with neobavaisoflavone to form a pi-H bond. In conclusion, neobavaisoflavone had excellent inhibitory effect on the biofilm formation and α-toxin activity of S. aureus. The WalK protein might be a potential target of neobavaisoflavone against S. aureus.
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Affiliation(s)
- Fang Fang
- Department of Infectious Diseases and Department of General Medicine, the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Medical School, Shenzhen, 518052, China
| | - Hongbo Xu
- Department of Critical Care Medicine and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Medical School, Shenzhen, 518052, China
| | - Bao Chai
- Department of Dermatology, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Medical School, Shenzhen, 518052, China
| | - Duoyun Li
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Medical School, Shenzhen, 518052, China
| | - Lei Nie
- Department of Infectious Diseases and Department of General Medicine, the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Medical School, Shenzhen, 518052, China
| | - Zewen Wen
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Medical School, Shenzhen, 518052, China
| | - Zhijian Yu
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Medical School, Shenzhen, 518052, China
| | - Jinxin Zheng
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Medical School, Shenzhen, 518052, China.
| | - Haigang Zhang
- Department of Critical Care Medicine and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Medical School, Shenzhen, 518052, China.
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Chen Z, Xie Z, Han M, Jin Q, Li Z, Zhai Y, Zhang M, Hu G, Zhang H. Global Transcriptomic Study of Circular-RNA Expression Profile in Osteoclasts Infected by Intracellular Staphylococcus aureus. Infect Immun 2023; 91:e0035722. [PMID: 37212691 PMCID: PMC10269070 DOI: 10.1128/iai.00357-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Accepted: 05/01/2023] [Indexed: 05/23/2023] Open
Abstract
Osteomyelitis is difficult to cure, and the rapidly rising morbidity is a thorny problem accompanied by a large number of joint replacement applications. Staphylococcus aureus is the main pathogen of osteomyelitis. Circular RNAs (circRNAs), as emerging noncoding RNAs, play important roles in multiple physiopathological processes which could provide novel insights into osteomyelitis. However, little is known about the roles of circRNAs in the pathogenesis of osteomyelitis. Osteoclasts, considered bone sentinels, are the resident macrophages in bone and may play the immune defense roles in osteomyelitis. It has been reported that S. aureus can survive in osteoclasts, but the function of osteoclast circRNAs in response to intracellular S. aureus infection remains unclear. In this study, we investigated the profile of circRNAs in osteoclasts infected by intracellular S. aureus through high-throughput RNA sequencing. In total, 24 upregulated and 62 downregulated differentially expressed circRNAs were identified and subsequently analyzed to demonstrate their potential functions. On this basis, three circRNAs (chr4:130718154-130728164+, chr8:77409548-77413627-, and chr1:190871592-190899571-) were confirmed as potential novel biomarkers for the diagnosis of osteomyelitis through the murine model of osteomyelitis. Most importantly, we verified that the circRNA chr4:130718154-130728164+ named circPum1 could regulate the host autophagy to affect the intracellular infection of S. aureus through miR-767. In addition, circPum1 could serve as a promising serum biomarker in osteomyelitis patients caused by S. aureus infection. Taken together, this study provided the first global transcriptomic profile analysis of circRNAs in osteoclasts infected by intracellular S. aureus and first proposed a novel perspective for the pathogenesis and immunotherapy of S. aureus-induced osteomyelitis from the term of circRNAs.
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Affiliation(s)
- Zhihao Chen
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, People’s Republic of China
| | - Zonggang Xie
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, People’s Republic of China
| | - Mingxiao Han
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, People’s Republic of China
| | - Qiyuan Jin
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, People’s Republic of China
| | - Ziyuan Li
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, People’s Republic of China
| | - Yaxuan Zhai
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, People’s Republic of China
| | - Minxing Zhang
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, People’s Republic of China
| | - Gangfeng Hu
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, People’s Republic of China
| | - Haifang Zhang
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, People’s Republic of China
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Liu L, Peng H, Zhang N, Li M, Chen Z, Shang W, Hu Z, Wang Y, Yang Y, Wang D, Hu Q, Rao X. Genomic Epidemiology and Phenotypic Characterization of Staphylococcus aureus from a Tertiary Hospital in Tianjin Municipality, Northern China. Microbiol Spectr 2023; 11:e0420922. [PMID: 36786628 PMCID: PMC10100870 DOI: 10.1128/spectrum.04209-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Accepted: 01/14/2023] [Indexed: 02/15/2023] Open
Abstract
Staphylococcus aureus remains a dangerous pathogen and poses a great threat to public health worldwide. The prevalence of the S. aureus clonotype is temporally and geographically variable. The genomic and phenotypic characteristics of S. aureus isolates in Tianjin, which is among the four big municipalities in China, are unclear. In the present study, 201 nonduplicate S. aureus isolates, including 70 methicillin-resistant S. aureus (MRSA) and 131 methicillin-susceptible S. aureus (MSSA), were collected from 2015 to 2021 in a tertiary hospital in Tianjin. Whole-genome sequencing of S. aureus isolates was carried out to investigate bacterial molecular characteristics, genomic phylogeny, antimicrobial resistance (AMR) gene carriage, and virulence factor gene distribution. The antibiotic resistance profiles, hemolytic activities, and biofilm formation abilities of the S. aureus isolates were also determined. In total, 31 distinct sequence types (STs) and 68 spa types were identified. ST59 (15.9%, 32/201) was the predominant clonotype, followed by ST398 (14.9%, 30/201) and several other major STs (ST1, ST5, ST6, ST22, ST25, ST188, and the newly emerging ST5527). ST59 and ST5527 mainly included MRSA isolates, while ST398 and the other major STs mainly included MSSA isolates. The unique characteristics of the S. aureus isolates belonging to the major STs were determined. ST59 isolates exhibited strong hemolytic activity, and ST398 strains had high biofilm formation capacity, while ST5527 isolates presented the greatest AMR. The genomic epidemiology and phenotypic characteristics of S. aureus isolates determined in this study will help in disease control in nosocomial environments. IMPORTANCE Staphylococcus aureus is an important bacterium pathogen in tertiary hospitals, which provide rich medical resources. Tianjin is one of the four municipalities in China with a population of more than 13 million. However, the epidemiology and molecular characteristics of S. aureus isolates in Tianjin are unknown. In this study, the genomic and phenotypic analyses were performed to investigate 201 S. aureus isolates collected from a tertiary hospital in Tianjin over a time span of 6 years. The refined analysis of predominant clones ST59, ST398, the newly emerging clone ST5527, as well as other major clones, will undoubtedly aid in the control and prevention of infections caused by S. aureus in tertiary hospitals.
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Affiliation(s)
- Lu Liu
- Department of Microbiology, School of Medicine, Chongqing University, Chongqing, China
| | - Huagang Peng
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing, China
| | - Naan Zhang
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing, China
| | - Mengyang Li
- Department of Microbiology, School of Medicine, Chongqing University, Chongqing, China
| | - Zhaozhe Chen
- Department of Clinical Laboratory, 983th hospital of PLA, Tianjin, China
| | - Weilong Shang
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing, China
| | - Zhen Hu
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing, China
| | - Yuting Wang
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing, China
| | - Yi Yang
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing, China
| | - Dongmei Wang
- Department of Clinical Laboratory, 983th hospital of PLA, Tianjin, China
| | - Qiwen Hu
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing, China
| | - Xiancai Rao
- Department of Microbiology, School of Medicine, Chongqing University, Chongqing, China
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing, China
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11
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Zhu K, Li G, Li J, Zheng M, Peng X, Rao Y, Li M, Zhou R, Rao X. Hcp1-loaded staphylococcal membrane vesicle vaccine protects against acute melioidosis. Front Immunol 2022; 13:1089225. [PMID: 36618368 PMCID: PMC9822774 DOI: 10.3389/fimmu.2022.1089225] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022] Open
Abstract
Burkholderia pseudomallei is the causal agent of melioidosis, a deadly tropical infectious disease that lacks a vaccine. On the basis of the attenuated Staphylococcus aureus RN4220-Δagr (RN), we engineered the RN4220-Δagr/pdhB-hcp1 strain (RN-Hcp1) to generate B. pseudomallei hemolysin-coregulated protein 1 (Hcp1)-loaded membrane vesicles (hcp1MVs). The immunization of BALB/c mice with hcp1MVs mixed with adjuvant by a three-dose regimen increased the serum specific IgG production. The serum levels of inflammatory factors, including TNF-α and IL-6, in hcp1MV-vaccinated mice were comparable with those in PBS-challenged mice. The partial adjuvant effect of staphylococcal MVs was observed with the elevation of specific antibody titer in hcp1MV-vaccinated mice relative to those that received the recombinant Hcp1 protein (rHcp1) or MVs derived from RN strain (ΔagrMVs). The hcp1MVs/adjuvant vaccine protected 70% of mice from lethal B. pseudomallei challenge. Immunization with hcp1MVs only protected 60% of mice, whereas vaccination with rHcp1 or ΔagrMVs conferred no protection. Moreover, mice that received hcp1MVs/adjuvant and hcp1MVs immunization had low serum TNF-α and IL-6 levels and no inflammatory infiltration in comparison with other groups. In addition, all surviving mice in hcp1MVs/adjuvant and hcp1MVs groups exhibited no culturable bacteria in their lungs, livers, and spleens five days postinfection. Overall, our data highlighted a new strategy for developing B. pseudomallei vaccine and showed that Hcp1-incorporated staphylococcal MV is a promising candidate for the prevention of acute melioidosis.
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Affiliation(s)
- Keting Zhu
- Department of Emergency Medicine, Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Gang Li
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing, China
| | - Jia Li
- Department of Emergency Medicine, Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Mingxia Zheng
- Department of Emergency Medicine, Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Xiaohui Peng
- Department of Emergency Medicine, Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Yifan Rao
- Department of Emergency Medicine, Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Ming Li
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing, China,*Correspondence: Ming Li, ; Renjie Zhou, ; Xiancai Rao,
| | - Renjie Zhou
- Department of Emergency Medicine, Xinqiao Hospital, Army Medical University, Chongqing, China,*Correspondence: Ming Li, ; Renjie Zhou, ; Xiancai Rao,
| | - Xiancai Rao
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing, China,*Correspondence: Ming Li, ; Renjie Zhou, ; Xiancai Rao,
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12
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Zheng M, Zhu K, Peng H, Shang W, Zhao Y, Lu S, Rao X, Li M, Zhou R, Li G. CcpA Regulates Staphylococcus aureus Biofilm Formation through Direct Repression of Staphylokinase Expression. Antibiotics (Basel) 2022; 11:antibiotics11101426. [PMID: 36290085 PMCID: PMC9598941 DOI: 10.3390/antibiotics11101426] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/08/2022] [Accepted: 10/13/2022] [Indexed: 11/16/2022] Open
Abstract
Staphylococcus aureus represents a notorious opportunistic pathogen causing various infections in biofilm nature, imposing remarkable therapeutic challenges worldwide. The catabolite control protein A (CcpA), a major regulator of carbon catabolite repression (CCR), has been recognized to modulate S. aureus biofilm formation, while the underlying mechanism remains to be fully elucidated. In this study, the reduced biofilm was firstly determined in the ccpA deletion mutant of S. aureus clinical isolate XN108 using both crystal violet staining and confocal laser scanning microscopy. RNA-seq analysis suggested that sak-encoding staphylokinase (Sak) was significantly upregulated in the mutant ∆ccpA, which was further confirmed by RT-qPCR. Consistently, the induced Sak production correlated the elevated promoter activity of sak and increased secretion in the supernatants, as demonstrated by Psak-lacZ reporter fusion expression and chromogenic detection, respectively. Notably, electrophoretic mobility shift assays showed that purified recombinant protein CcpA binds directly to the promoter region of sak, suggesting the direct negative control of sak expression by CcpA. Double isogenic deletion of ccpA and sak restored biofilm formation for mutant ∆ccpA, which could be diminished by trans-complemented sak. Furthermore, the exogenous addition of recombinant Sak inhibited biofilm formation for XN108 in a dose-dependent manner. Together, this study delineates a novel model of CcpA-controlled S. aureus biofilm through direct inhibition of sak expression, highlighting the multifaceted roles and multiple networks regulated by CcpA.
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Affiliation(s)
- Mingxia Zheng
- Department of Emergency Medicine, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Keting Zhu
- Department of Emergency Medicine, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Huagang Peng
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing 400038, China
| | - Weilong Shang
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing 400038, China
| | - Yan Zhao
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing 400038, China
| | - Shuguang Lu
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing 400038, China
| | - Xiancai Rao
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing 400038, China
| | - Ming Li
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing 400038, China
- Correspondence: (M.L.); (R.Z.); (G.L.)
| | - Renjie Zhou
- Department of Emergency Medicine, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
- Correspondence: (M.L.); (R.Z.); (G.L.)
| | - Gang Li
- Department of Microbiology, College of Basic Medical Sciences, Army Medical University, Chongqing 400038, China
- Correspondence: (M.L.); (R.Z.); (G.L.)
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13
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Han M, Chen Z, He P, Li Z, Chen Q, Tong Z, Wang M, Du H, Zhang H. YgiM may act as a trigger in the sepsis caused by Klebsiella pneumoniae through the membrane-associated ceRNA network. Front Genet 2022; 13:973145. [PMID: 36212144 PMCID: PMC9537587 DOI: 10.3389/fgene.2022.973145] [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: 06/19/2022] [Accepted: 09/07/2022] [Indexed: 11/27/2022] Open
Abstract
Sepsis is one of the diseases that can cause serious mortality. In E. coli, an inner membrane protein YgiM encoded by gene ygiM can target the eukaryotic peroxisome. Peroxisome is a membrane-enclosed organelle associated with the ROS metabolism and was reported to play the key role in immune responses and inflammation during the development of sepsis. Klebsiella pneumoniae (K. pneumoniae) is one of the important pathogens causing sepsis. However, the function of gene vk055_4013 which is highly homologous to ygiM of E. coli has not been demonstrated in K. pneumoniae. In this study, we prepared ΔygiM of K. pneumoniae ATCC43816, and found that the deletion of ygiM did not affect bacterial growth and mouse mortality in the mouse infection model. Interestingly, ΔygiM not only resulted in reduced bacterial resistance to macrophages, but also attenuated pathological manifestations in mouse organs. Furthermore, based on the data of Gene Expression Omnibus, the expression profiles of micro RNAs (miRNAs) and messenger RNAs (mRNAs) in the serum of 44 sepsis patients caused by K. pneumoniae infection were analyzed, and 11 differently expressed miRNAs and 8 DEmRNAs associated with the membrane function were found. Finally, the membrane-associated competing endogenous RNAs (ceRNAs) network was constructed. In this ceRNAs network, DEmiRNAs (hsa-miR-7108-5p, hsa-miR-6780a-5p, hsa-miR-6756-5p, hsa-miR-4433b-3p, hsa-miR-3652, hsa-miR-342-3p, hsa-miR-32-5p) and their potential downstream target DEmRNAs (VNN1, CEACAM8, PGLYRP1) were verified in the cell model infected by wild type and ΔygiM of K. pneumoniae, respectively. Taken together, YgiM may trigger the sepsis caused by K. pneumoniae via membrane-associated ceRNAs. This study provided new insights into the role of YgiM in the process of K. pneumoniae induced sepsis.
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Affiliation(s)
- Mingxiao Han
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Zhihao Chen
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, China
- Department of Musculoskeletal Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
- State Key Laboratory of Oncology in Southern China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Ping He
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, China
- Department of Clinical Laboratory, Sichuan Province Science City Hospital, Chengdu, China
| | - Ziyuan Li
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Qi Chen
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Zelei Tong
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Min Wang
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Hong Du
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, China
- *Correspondence: Haifang Zhang, , ; Hong Du,
| | - Haifang Zhang
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, China
- *Correspondence: Haifang Zhang, , ; Hong Du,
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