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Yang F, Shu R, Dai W, Li B, Liu C, Yang H, Johnson HM, Yu S, Bai D, Yang W, Deng Y. H 2Se-evolving bio-heterojunctions promote cutaneous regeneration in infected wounds by inhibiting excessive cellular senescence. Biomaterials 2024; 311:122659. [PMID: 38861831 DOI: 10.1016/j.biomaterials.2024.122659] [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: 01/25/2024] [Revised: 06/04/2024] [Accepted: 06/06/2024] [Indexed: 06/13/2024]
Abstract
Pathogenic infection leads to excessive senescent cell accumulation and stagnation of wound healing. To address these issues, we devise and develop a hydrogen selenide (H2Se)-evolving bio-heterojunction (bio-HJ) composed of graphene oxide (GO) and FeSe2 to deracinate bacterial infection, suppress cellular senescence and remedy recalcitrant infected wounds. Excited by near-infrared (NIR) laser, the bio-HJ exerts desired photothermal and photodynamic effects, resulting in rapid disinfection. The crafted bio-HJ could also evolve gaseous H2Se to inhibit cellular senescence and dampen inflammation. Mechanism studies reveal the anti-senescence effects of H2Se-evolving bio-HJ are mediated by selenium pathway and glutathione peroxidase 1 (GPX1). More critically, in vivo experiments authenticate that the H2Se-evolving bio-HJ could inhibit cellular senescence and potentiate wound regeneration in rats. As envisioned, our work not only furnishes the novel gasotransmitter-delivering bio-HJ for chronic infected wounds, but also gets insight into the development of anti-senescence biomaterials.
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Affiliation(s)
- Fan Yang
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, College of Biomedical Engineering, School of Chemical Engineering, Sichuan University, Chengdu, China; Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Rui Shu
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, College of Biomedical Engineering, School of Chemical Engineering, Sichuan University, Chengdu, China; Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Wenyu Dai
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, College of Biomedical Engineering, School of Chemical Engineering, Sichuan University, Chengdu, China; Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Bin Li
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, College of Biomedical Engineering, School of Chemical Engineering, Sichuan University, Chengdu, China; Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Chuang Liu
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, College of Biomedical Engineering, School of Chemical Engineering, Sichuan University, Chengdu, China
| | - Hang Yang
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, College of Biomedical Engineering, School of Chemical Engineering, Sichuan University, Chengdu, China
| | - Hannah M Johnson
- Department of Chemistry, Washington State University, Washington, USA
| | - Sheng Yu
- Department of Chemistry, Washington State University, Washington, USA
| | - Ding Bai
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, College of Biomedical Engineering, School of Chemical Engineering, Sichuan University, Chengdu, China; Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Weizhong Yang
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, College of Biomedical Engineering, School of Chemical Engineering, Sichuan University, Chengdu, China.
| | - Yi Deng
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, College of Biomedical Engineering, School of Chemical Engineering, Sichuan University, Chengdu, China; State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, China; Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China.
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2
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Augustus AR, Jana S, Samsudeen MB, Nagaiah HP, Shunmugiah KP. In vitro and in vivo evaluation of the anti-infective potential of the essential oil extracted from the leaves of Plectranthus amboinicus (lour.) spreng against Klebsiella pneumoniae and elucidation of its mechanism of action through proteomics approach. JOURNAL OF ETHNOPHARMACOLOGY 2024; 330:118202. [PMID: 38641078 DOI: 10.1016/j.jep.2024.118202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 03/06/2024] [Accepted: 04/13/2024] [Indexed: 04/21/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Members of Plectranthus genus such as Plectranthus amboinicus (Lour.) Spreng is a well-known folkloric medicine around the globe in treating several human ailments such as cardiovascular, respiratory, digestive, urinary tract, skin and infective diseases. Its therapeutic value is primarily attributed to its essential oil. Although several properties of Plectranthus amboinicus essential oil have been documented, its mechanism of action and safety has not been completely elucidated. AIM OF THE STUDY To investigate the anti-infective potential of Plectranthus amboinicus essential oil against Klebsiella pneumoniae using in vitro and in vivo bioassays and identify its mode of action. The study was conducted to scientifically validate the traditional usage of Plectranthus amboinicus oil and propose it as a complementary and alternative medication to combat Klebsiella pneumoniae infections due to emerging antibiotic resistance problem. MATERIALS AND METHODS Plectranthus amboinicus essential oil was extracted through steam distillation and was chemically characterized using Gas Chromatography Mass Spectrometry (GC-MS). The antibacterial activity was assessed using microbroth dilution assay, metabolic viability assay and growth curve analysis. The mode of action was elucidated by the proteomics approach using Nano-LC-MS/MS followed by in silico analysis. The results of proteomic analysis were further validated through several in vitro assays. The cytotoxic nature of the essential oil was also confirmed using adenocarcinomic human alveolar basal epithelial (A549) cells. Furthermore, the safety and in vivo anti-infective efficacy of Plectranthus amboinicus essential oil was evaluated through survival assay, CFU assay and histopathological analysis of vital organs using zebrafish as a model organism. RESULTS The chemical characterization of Plectranthus amboinicus essential oil revealed that it is predominantly composed of thymol. Thymol rich P. amboinicus essential oil demonstrated potent inhibitory effects on Klebsiella pneumoniae growth, achieving a significant reduction at a concentration of 400 μg/mL within 4 h of treatment The nano-LC-MS/MS approach unveiled that the essential oil exerted its impact by disrupting the antioxidant defense system and efflux pump system of the bacterium, resulting in elevated cellular oxidative stress and affect the biosynthesis of biofilm. The same was validated through several in vitro assays. Furthermore, the toxicity of Plectranthus amboinicus essential oil determined using A549 cells and zebrafish survival assay established a non-toxic concentration of 400 μg/mL and 12.5 μg/mL respectively. The results of anti-infective potential of the essential oil using Zebrafish as a model organism demonstrated significantly improved survival rates, reduced bacterial load, alleviated visible signs of inflammation and mitigated the adverse effects of infection on various organs, as evidenced by histopathological analysis ensuring its safety for potential therapeutic application. CONCLUSION The executed in vitro and in vivo assays established the effectiveness of essential oil in inhibiting bacterial growth by targeting key proteins associated with the bacterial antioxidant defense system and disrupted the integrity of the cell membrane, highlighting its critical role in addressing the challenge posed by antibiotic-resistant Klebsiella pneumoniae.
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Affiliation(s)
- Akshaya Rani Augustus
- Department of Biotechnology, Alagappa University, Science Campus, Karaikudi, Tamil Nadu, India
| | - Sudipta Jana
- Department of Biotechnology, Alagappa University, Science Campus, Karaikudi, Tamil Nadu, India
| | - Malik Basha Samsudeen
- Department of Biotechnology, Alagappa University, Science Campus, Karaikudi, Tamil Nadu, India
| | - Hari Prasath Nagaiah
- Department of Biotechnology, Alagappa University, Science Campus, Karaikudi, Tamil Nadu, India
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Li J, Sun M, Tang X, Liu Y, Ou C, Luo Y, Wang L, Hai L, Deng L, He D. Acidic biofilm microenvironment-responsive ROS generation via a protein nanoassembly with hypoxia-relieving and GSH-depleting capabilities for efficient elimination of biofilm bacteria. Acta Biomater 2024:S1742-7061(24)00425-2. [PMID: 39097126 DOI: 10.1016/j.actbio.2024.07.044] [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: 05/16/2024] [Revised: 07/16/2024] [Accepted: 07/28/2024] [Indexed: 08/05/2024]
Abstract
Reactive oxygen species (ROS) are widely considered to the effective therapeutics for fighting bacterial infections especially those associated with biofilm. However, biofilm microenvironments including hypoxia, limited H2O2, and high glutathione (GSH) level seriously limit the therapeutic efficacy of ROS-based strategies. Herein, we have developed an acidic biofilm microenvironment-responsive antibacterial nanoplatform consisting of copper-dopped bovine serum albumin (CBSA) loaded with copper peroxide (CuO2) synthesized in situ and indocyanine green (ICG). The three-in-one nanotherapeutics (CuO2/ICG@CBSA) are capable of releasing Cu2+ and H2O2 in a slightly acidic environment, where Cu2+ catalyzes the conversion of H2O2 into hydroxyl radical (•OH) and consumes the highly expressed GSH to disrupt the redox homeostasis. With the assistance of an 808 nm laser, the loaded ICG not only triggers the production of singlet oxygen (1O2) by a photodynamic process, but also provides photonic hyperpyrexia that further promotes the Fenton-like reaction for enhancing •OH production and induces thermal decomposition of CuO2 for the O2-self-supplying 1O2 generation. The CuO2/ICG@CBSA with laser irradiation demonstrates photothermal-augmented multi-mode synergistic bactericidal effect and is capable of inhibiting biofilm formation and eradicating the biofilm bacteria. Further in vivo experiments suggest that the CuO2/ICG@CBSA can effectively eliminate wound infections and accelerate wound healing. The proposed three-in-one nanotherapeutics with O2/H2O2-self-supplied ROS generating capability show great potential in treating biofilm-associated bacterial infections. STATEMENT OF SIGNIFICANCE: Here, we have developed an acidic biofilm microenvironment-responsive nanoplatform consisting of copper-dopped bovine serum albumin (CBSA) loaded with copper peroxide (CuO2) synthesized in situ and indocyanine green (ICG). The nanotherapeutics (CuO2/ICG@CBSA) are capable of releasing Cu2+ and H2O2 in an acidic environment, where Cu2+ catalyzes the conversion of H2O2 into •OH and consumes the overexpressed GSH to improve oxidative stress. With the aid of an 808 nm laser, ICG provides photonic hyperpyrexia for enhancing •OH production, and triggers O2-self-supplying 1O2 generation. CuO2/ICG@CBSA with laser irradiation displays photothermal-augmented multi-mode antibacterial and antibiofilm effect. Further in vivo experiments prove that CuO2/ICG@CBSA effectively eliminates wound infection and promotes wound healing. The proposed three-in-one nanotherapeutics show great potential in treating biofilm-associated bacterial infections.
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Affiliation(s)
- Junqin Li
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Institute of Interdisciplinary Studies, Hunan Normal University, Changsha 410081, PR China
| | - Mengya Sun
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Institute of Interdisciplinary Studies, Hunan Normal University, Changsha 410081, PR China
| | - Xiaoxian Tang
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Institute of Interdisciplinary Studies, Hunan Normal University, Changsha 410081, PR China
| | - Yuqian Liu
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Institute of Interdisciplinary Studies, Hunan Normal University, Changsha 410081, PR China
| | - Chunlei Ou
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Institute of Interdisciplinary Studies, Hunan Normal University, Changsha 410081, PR China
| | - Yuze Luo
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Institute of Interdisciplinary Studies, Hunan Normal University, Changsha 410081, PR China
| | - Li Wang
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Institute of Interdisciplinary Studies, Hunan Normal University, Changsha 410081, PR China
| | - Luo Hai
- Central Laboratory & Shenzhen Key Laboratory of Epigenetics and Precision Medicine for Cancers, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen 518116, PR China.
| | - Le Deng
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Institute of Interdisciplinary Studies, Hunan Normal University, Changsha 410081, PR China
| | - Dinggeng He
- College of Life Science, State Key Laboratory of Developmental Biology of Freshwater Fish, Institute of Interdisciplinary Studies, Hunan Normal University, Changsha 410081, PR China.
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Black B, da Silva LBR, Hu G, Qu X, Smith DFQ, Magaña AA, Horianopoulos LC, Caza M, Attarian R, Foster LJ, Casadevall A, Kronstad JW. Glutathione-mediated redox regulation in Cryptococcus neoformans impacts virulence. Nat Microbiol 2024; 9:2084-2098. [PMID: 38956248 DOI: 10.1038/s41564-024-01721-x] [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: 08/22/2023] [Accepted: 05/07/2024] [Indexed: 07/04/2024]
Abstract
The fungal pathogen Cryptococcus neoformans is well adapted to its host environment. It has several defence mechanisms to evade oxidative and nitrosative agents released by phagocytic host cells during infection. Among them, melanin production is linked to both fungal virulence and defence against harmful free radicals that facilitate host innate immunity. How C. neoformans manipulates its redox environment to facilitate melanin formation and virulence is unclear. Here we show that the antioxidant glutathione is inextricably linked to redox-active processes that facilitate melanin and titan cell production, as well as survival in macrophages and virulence in a murine model of cryptococcosis. Comparative metabolomics revealed that disruption of glutathione biosynthesis leads to accumulation of reducing and acidic compounds in the extracellular environment of mutant cells. Overall, these findings highlight the importance of redox homeostasis and metabolic compensation in pathogen adaptation to the host environment and suggest new avenues for antifungal drug development.
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Affiliation(s)
- Braydon Black
- The Michael Smith Laboratories, Departments of Microbiology and Immunology, and Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Leandro Buffoni Roque da Silva
- The Michael Smith Laboratories, Departments of Microbiology and Immunology, and Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Guanggan Hu
- The Michael Smith Laboratories, Departments of Microbiology and Immunology, and Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Xianya Qu
- The Michael Smith Laboratories, Departments of Microbiology and Immunology, and Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Daniel F Q Smith
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Armando Alcázar Magaña
- The Michael Smith Laboratories, Departments of Microbiology and Immunology, and Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada
- Metabolomics Core Facility, Life Sciences Institute, Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Linda C Horianopoulos
- The Michael Smith Laboratories, Departments of Microbiology and Immunology, and Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada
- Wisconsin Energy Institute, University of Wisconsin-Madison, Madison, WI, USA
| | - Mélissa Caza
- The Michael Smith Laboratories, Departments of Microbiology and Immunology, and Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada
- Larissa Yarr Medical Microbiology Laboratory, Kelowna General Hospital, Kelowna, British Columbia, Canada
| | - Rodgoun Attarian
- The Michael Smith Laboratories, Departments of Microbiology and Immunology, and Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada
- Pfizer Canada, Kirkland, Quebec, Canada
| | - Leonard J Foster
- The Michael Smith Laboratories, Departments of Microbiology and Immunology, and Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada
- Metabolomics Core Facility, Life Sciences Institute, Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Arturo Casadevall
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - James W Kronstad
- The Michael Smith Laboratories, Departments of Microbiology and Immunology, and Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada.
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Zhou X, Ma S, Xu Y, Sun C, Liao J, Song M, Li G, Yuchen L, Chen P, Hu Y, Wang Y, Yu B. Nicotine promotes Staphylococcus aureus-induced osteomyelitis by activating the Nrf2/Slc7a11 signaling axis. Int Immunopharmacol 2024; 135:112223. [PMID: 38772295 DOI: 10.1016/j.intimp.2024.112223] [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: 12/13/2023] [Revised: 05/03/2024] [Accepted: 05/05/2024] [Indexed: 05/23/2024]
Abstract
Although smoking is a significant risk factor for osteomyelitis, there is limited experimental evidence that nicotine, a key tobacco constituent, is associated with this condition, leaving its mechanistic implications uncharacterized. This study revealed that nicotine promotes Staphylococcus aureus-induced osteomyelitis by increasing Nrf2 and Slc7a11 expression in vivo and in vitro. Inhibition of Slc7a11 using Erastin augmented bacterial phagocytosis/killing capabilities and fortified antimicrobial responses in an osteomyelitis model. Moreover, untargeted metabolomic analysis demonstrated that Erastin mitigated the effects of nicotine on S. aureus-induced osteomyelitis by altering glutamate/glutathione metabolism. These findings suggest that nicotine aggravates S. aureus-induced osteomyelitis by activating the Nrf2/Slc7a11 signaling pathway and that Slc7a11 inhibition can counteract the detrimental health effects of nicotine.
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Affiliation(s)
- Xuyou Zhou
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Sushuang Ma
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Orthopaedics, The Fifth Affiliated Hospital, Southerm Medical University, Guangzhou, China
| | - Yuan Xu
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Chongkai Sun
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Juncheng Liao
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Mingrui Song
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Guanzhi Li
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Liu Yuchen
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Peng Chen
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Orthopedics, Hainan General Hospital (Hainan Affiliated Hospital of Hainan Medical University), Haikou, China
| | - Yanjun Hu
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yutian Wang
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, China.
| | - Bin Yu
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, China.
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Yao T, Zeng X, Li H, Luo T, Tao X, Xu H. Metal-polyphenol coordination nanosheets with synergistic peroxidase-like and photothermal properties for efficient antibacterial treatment. Int J Biol Macromol 2024; 269:132115. [PMID: 38719015 DOI: 10.1016/j.ijbiomac.2024.132115] [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: 03/14/2024] [Revised: 04/30/2024] [Accepted: 05/04/2024] [Indexed: 05/12/2024]
Abstract
Bacterial infections pose a serious threat to human health and socioeconomics worldwide. In the post-antibiotic era, the development of novel antimicrobial agents remains a challenge. Polyphenols are natural compounds with a variety of biological activities such as intrinsic antimicrobial activity and antioxidant properties. Metal-polyphenol obtained by chelation of polyphenol ligands with metal ions not only possesses efficient antimicrobial activity but also excellent biocompatibility, which has great potential for application in biomedical and food packaging fields. Herein, we developed metal-polyphenol coordination nanosheets named copper oxidized tannic acid quinone (CuTAQ) possessing efficient antibacterial and anti-biofilm effects, which was synthesized by a facile one-pot method. The synthesis was achieved by chelation of partially oxidized tannic acid (TA) with Cu2+ under mild conditions, which supports low-cost and large-scale production. It was demonstrated that CuTAQ exhibited high antibacterial activity via disrupting the integrity of bacterial cell membranes, inducing oxidative stress, and interfering with metabolism. In addition, CuTAQ exhibits excellent peroxidase catalytic activity and photothermal conversion properties, which play a significant role in enhancing its bactericidal and biofilm scavenging abilities. This study provides insights for rational design of innovative metal-polyphenol nanomaterials with efficient antimicrobial properties.
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Affiliation(s)
- Ting Yao
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, PR China
| | - Xianxiang Zeng
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, PR China
| | - Hui Li
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, PR China
| | - Tao Luo
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, PR China
| | - Xueying Tao
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, PR China
| | - Hengyi Xu
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, PR China; International Institute of Food Innovation Co., Ltd., Nanchang University, Nanchang 330200, PR China.
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Baev V, Gecheva G, Apostolova E, Gozmanova M, Yahubyan G. Exploring the Metatranscriptome of Bacterial Communities of Two Moss Species Thriving in Different Environments-Terrestrial and Aquatic. PLANTS (BASEL, SWITZERLAND) 2024; 13:1210. [PMID: 38732425 PMCID: PMC11085137 DOI: 10.3390/plants13091210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 04/22/2024] [Accepted: 04/24/2024] [Indexed: 05/13/2024]
Abstract
Mosses host diverse bacterial communities essential for their fitness, nutrient acquisition, stress tolerance, and pathogen defense. Understanding the microbiome's taxonomic composition is the first step, but unraveling their functional capabilities is crucial for grasping their ecological significance. Metagenomics characterizes microbial communities by composition, while metatranscriptomics explores gene expression, providing insights into microbiome functionality beyond the structure. Here, we present for the first time a metatranscriptomic study of two moss species, Hypnum cupressiforme (Hedw.) and Platyhypnidium riparioides (Hedw.) Dixon., renowned as key biomonitors of atmospheric and water pollution. Our investigation extends beyond taxonomic profiling and offers a profound exploration of moss bacterial communities. Pseudomonadota and Actinobacteria are the dominant bacterial phyla in both moss species, but their proportions differ. In H. cupressiforme, Actinobacteria make up 62.45% and Pseudomonadota 32.48%, while in P. riparioides, Actinobacteria account for only 25.67% and Pseudomonadota 69.08%. This phylum-level contrast is reflected in genus-level differences. Our study also shows the expression of most genes related to nitrogen cycling across both microbiomes. Additionally, functional annotation highlights disparities in pathway prevalence, including carbon dioxide fixation, photosynthesis, and fatty acid biosynthesis, among others. These findings hint at potential metabolic distinctions between microbial communities associated with different moss species, influenced by their specific genotypes and habitats. The integration of metatranscriptomic data holds promise for enhancing our understanding of bryophyte-microbe partnerships, opening avenues for novel applications in conservation, bioremediation, and sustainable agriculture.
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Affiliation(s)
- Vesselin Baev
- Department of Molecular Biology, Faculty of Biology, University of Plovdiv, Tzar Assen 24, 4000 Plovdiv, Bulgaria; (E.A.); (M.G.)
| | - Gana Gecheva
- Department of Ecology and Environmental Conservation, Faculty of Biology, University of Plovdiv, Tzar Assen 24, 4000 Plovdiv, Bulgaria;
| | - Elena Apostolova
- Department of Molecular Biology, Faculty of Biology, University of Plovdiv, Tzar Assen 24, 4000 Plovdiv, Bulgaria; (E.A.); (M.G.)
| | - Mariyana Gozmanova
- Department of Molecular Biology, Faculty of Biology, University of Plovdiv, Tzar Assen 24, 4000 Plovdiv, Bulgaria; (E.A.); (M.G.)
| | - Galina Yahubyan
- Department of Molecular Biology, Faculty of Biology, University of Plovdiv, Tzar Assen 24, 4000 Plovdiv, Bulgaria; (E.A.); (M.G.)
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Song SN, Zhao XL, Yang XC, Ding Y, Ren FD, Pang XY, Li B, Hu JY, Chen YZ, Gao WW. Nanoarchitectonics of Bimetallic Cu-/Co-Doped Nitrogen-Carbon Nanozyme-Functionalized Hydrogel with NIR-Responsive Phototherapy for Synergistic Mitigation of Drug-Resistant Bacterial Infections. ACS APPLIED MATERIALS & INTERFACES 2024; 16:16011-16028. [PMID: 38529951 DOI: 10.1021/acsami.4c01783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
Superbug infections and transmission have become major challenges in the contemporary medical field. The development of novel antibacterial strategies to efficiently treat bacterial infections and conquer the problem of antimicrobial resistance (AMR) is extremely important. In this paper, a bimetallic CuCo-doped nitrogen-carbon nanozyme-functionalized hydrogel (CuCo/NC-HG) has been successfully constructed. It exhibits photoresponsive-enhanced enzymatic effects under near-infrared (NIR) irradiation (808 nm) with strong peroxidase (POD)-like and oxidase (OXD)-like activities. Upon NIR irradiation, CuCo/NC-HG possesses photodynamic activity for producing singlet oxygen(1O2), and it also has a high photothermal conversion effect, which not only facilitates the elimination of bacteria but also improves the efficiency of reactive oxygen species (ROS) production and accelerates the consumption of GSH. CuCo/NC-HG shows a lower hemolytic rate and better cytocompatibility than CuCo/NC and possesses a positive charge and macroporous skeleton for restricting negatively charged bacteria in the range of ROS destruction, strengthening the antibacterial efficiency. Comparatively, CuCo/NC and CuCo/NC-HG have stronger bactericidal ability against methicillin-resistant Staphylococcus aureus (MRSA) and ampicillin-resistant Escherichia coli (AmprE. coli) through destroying the cell membranes with a negligible occurrence of AMR. More importantly, CuCo/NC-HG plus NIR irradiation can exhibit satisfactory bactericidal performance in the absence of H2O2, avoiding the toxicity from high-concentration H2O2. In vivo evaluation has been conducted using a mouse wound infection model and histological analyses, and the results show that CuCo/NC-HG upon NIR irradiation can efficiently suppress bacterial infections and promote wound healing, without causing inflammation and tissue adhesions.
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Affiliation(s)
- Sheng-Nan Song
- State Key Laboratory Base of Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Xin-Liu Zhao
- State Key Laboratory Base of Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Xiao-Chan Yang
- State Key Laboratory Base of Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Yong Ding
- State Key Laboratory Base of Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Feng-Di Ren
- Department of Chemistry, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, Shandong 266071, China
| | - Xue-Yao Pang
- State Key Laboratory Base of Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Bo Li
- State Key Laboratory Base of Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Ji-Yuan Hu
- State Key Laboratory Base of Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Yu-Zhen Chen
- State Key Laboratory Base of Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Wei-Wei Gao
- State Key Laboratory Base of Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
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Wang XY, Li P, Du XJ, Wang S. Effect of glutathione-transport-related gene gsiD on desiccation tolerance of Cronobacter sakazakii and its related regulatory mechanism. Appl Environ Microbiol 2024; 90:e0156223. [PMID: 38289135 PMCID: PMC10880603 DOI: 10.1128/aem.01562-23] [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] [Received: 09/13/2023] [Accepted: 11/16/2023] [Indexed: 02/22/2024] Open
Abstract
The outstanding desiccation tolerance of Cronobacter sakazakii (C. sakazakii) enables long-term persistence in food products with low-water activity to increase the infection risk, especially in low-birth-weight, immuno-compromised neonates, and infants less than 4 weeks of age. In our previous study, the disruption of glutathione transport-related gene gsiD by transposon was found to significantly increase its inactivation rate under drying stress challenges. However, the mechanism underlying the association between glutathione transport and desiccation tolerance of C. sakazakii remains to be clarified. In this study, the mechanism underlying their association was investigated in detail by constructing the gsiD gene deletion mutant. gsiD gene deletion was found to cause the dysfunction of the glutathione transport system GsiABCD and the limitation of glutathione import. The resulting decrease in intracellular glutathione caused the decreased potassium ions uptake and increased potassium ions efflux, inhibited the proline synthesis process, limited extracellular glutathione utilization, increased oxidant stress, reduced biofilm formation, and increased outer membrane permeability, which may be the main reasons for the significant reduction of the desiccation tolerance of C. sakazakii.IMPORTANCEContributing to its superior environmental adaptability, Cronobacter sakazakii can survive under many abiotic stress conditions. The outstanding desiccation tolerance makes this species persist in low-water activity foods, which increases harm to humans. For decades, many studies have focused on the desiccation tolerance of C. sakazakii, but the existing research is still insufficient. Our study found that gsiD gene deletion inhibited glutathione uptake and further decreased intracellular glutathione content, causing a decrease in desiccation tolerance and biofilm formation and an increase in outer membrane permeability. Moreover, the expression level of relative genes verified that gsiD gene deletion made the mutant not conducive to surviving in dry conditions due to restricting potassium ions uptake and efflux, inhibiting the conversion of glutamate to compatible solute proline, and increasing the oxidative stress of C. sakazakii. The above results enrich our knowledge of the desiccation tolerance mechanism of C. sakazakii.
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Affiliation(s)
- Xiao-yi Wang
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Ping Li
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Xin-jun Du
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Shuo Wang
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
- Tianjin Key Laboratory of Food Science and Health, College of Medicine, Nankai University, Tianjin, China
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10
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Zhangni L, Mofan X, Yuling C, Yingchao L. Clinical features and fecal microbiota characteristics of patients with both ulcerative colitis and axial spondyloarthritis. BMC Gastroenterol 2024; 24:56. [PMID: 38297219 PMCID: PMC10832282 DOI: 10.1186/s12876-024-03150-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Accepted: 01/26/2024] [Indexed: 02/02/2024] Open
Abstract
BACKGROUND The role of the intestinal microbiota in the pathogenesis of inflammatory bowel disease combined with axial spondyloarthritis (axSpA) is gaining widespread interest. AIMS This study was conducted to investigate the clinical and fecal microbiota characteristics of patients with both ulcerative colitis (UC) and axSpA. METHODS Clinical data were collected from patients with UC. Patients were divided into the axSpA and non-axSpA groups according to human leukocyte antigen-B27 serology and sacroiliac joint imaging results. We obtained fecal specimens from 14 axSpA and 26 non-axSpA patients. All samples underwent 16S ribosomal DNA sequencing. RESULTS Seventy-three patients with UC were included in this study, and the axSpA incidence was 19.2%. This incidence was significantly higher in patients with C-reactive protein > 10 mg/L. Firmicutes and Faecalibacterium abundances were decreased, and Proteobacteria and Escherichia_Shigella abundances were increased in the axSpA group compared with those of the non-axSpA group. Indicator analysis showed that Escherichia_Shigella was more likely to be an indicator species of axSpA. Additionally, many biosynthetic and metabolic pathways, including glutathione metabolism, fatty acid degradation, geraniol degradation, and biosynthesis of siderophore group nonribosomal peptides, were upregulated in the axSpA group. CONCLUSION Patients with UC have a high axSpA incidence, which may be related to the relative abundances of Escherichia_Shigella in these patients. The abundances of various biosynthetic and metabolic pathways of the fecal flora were upregulated in patients with axSpA.
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Affiliation(s)
- Lei Zhangni
- Department of Gastroenterology, the First Affiliated Hospital of Xi'an Jiao Tong University, Xi'an, 710061, China
| | - Xiao Mofan
- Department of Gastroenterology, the First Affiliated Hospital of Xi'an Jiao Tong University, Xi'an, 710061, China
| | - Chen Yuling
- Department of Gastroenterology, the First Affiliated Hospital of Xi'an Jiao Tong University, Xi'an, 710061, China
| | - Li Yingchao
- Department of Gastroenterology, the First Affiliated Hospital of Xi'an Jiao Tong University, Xi'an, 710061, China.
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11
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Klementiev AD, Garg N, Whiteley M. Identification of a glutathione transporter in A. actinomycetemcomitans. Microbiol Spectr 2024; 12:e0351123. [PMID: 38051055 PMCID: PMC10782972 DOI: 10.1128/spectrum.03511-23] [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] [Received: 09/29/2023] [Accepted: 10/31/2023] [Indexed: 12/07/2023] Open
Abstract
IMPORTANCE Microbes produce a large array of extracellular molecules, which serve as signals and cues to promote polymicrobial interactions and alter the function of microbial communities. This has been particularly well studied in the human oral microbiome, where key metabolites have been shown to impact both health and disease. Here, we used an untargeted mass spectrometry approach to comprehensively assess the extracellular metabolome of the pathogen Aggregatibacter actinomycetemcomitans and the commensal Streptococcus gordonii during mono- and co-culture. We generated and made publicly available a metabolomic data set that includes hundreds of potential metabolites and leveraged this data set to identify an operon important for glutathione secretion in A. actinomycetemcomitans.
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Affiliation(s)
- Alexander D. Klementiev
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA
- Center for Microbial Dynamics and Infection, Georgia Institute of Technology, Atlanta, Georgia, USA
| | - Neha Garg
- Center for Microbial Dynamics and Infection, Georgia Institute of Technology, Atlanta, Georgia, USA
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia, USA
| | - Marvin Whiteley
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA
- Center for Microbial Dynamics and Infection, Georgia Institute of Technology, Atlanta, Georgia, USA
- Emory-Children's Cystic Fibrosis Center, Atlanta, Georgia, USA
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12
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Dong Q, Hua D, Wang X, Jiao Y, Liu L, Deng Q, Wu T, Zou H, Zhao C, Wang C, Reng J, Ding L, Hu S, Shi J, Wang Y, Zhang H, Sheng Y, Sun W, Shen Y, Tang L, Kong X, Chen L. Temporal colonization and metabolic regulation of the gut microbiome in neonatal oxen at single nucleotide resolution. THE ISME JOURNAL 2024; 18:wrad022. [PMID: 38365257 PMCID: PMC10833086 DOI: 10.1093/ismejo/wrad022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/19/2023] [Accepted: 12/06/2023] [Indexed: 02/18/2024]
Abstract
The colonization of microbes in the gut is key to establishing a healthy host-microbiome symbiosis for newborns. We longitudinally profiled the gut microbiome in a model consisting of 36 neonatal oxen from birth up to 2 months postpartum and carried out microbial transplantation to reshape their gut microbiome. Genomic reconstruction of deeply sequenced fecal samples resulted in a total of 3931 metagenomic-assembled genomes from 472 representative species, of which 184 were identified as new species when compared with existing databases of oxen. Single nucleotide level metagenomic profiling shows a rapid influx of microbes after birth, followed by dynamic shifts during the first few weeks of life. Microbial transplantation was found to reshape the genetic makeup of 33 metagenomic-assembled genomes (FDR < 0.05), mainly from Prevotella and Bacteroides species. We further linked over 20 million microbial single nucleotide variations to 736 plasma metabolites, which enabled us to characterize 24 study-wide significant associations (P < 4.4 × 10-9) that identify the potential microbial genetic regulation of host immune and neuro-related metabolites, including glutathione and L-dopa. Our integration analyses further revealed that microbial genetic variations may influence the health status and growth performance by modulating metabolites via structural regulation of their encoded proteins. For instance, we found that the albumin levels and total antioxidant capacity were correlated with L-dopa, which was determined by single nucleotide variations via structural regulations of metabolic enzymes. The current results indicate that temporal colonization and transplantation-driven strain replacement are crucial for newborn gut development, offering insights for enhancing newborn health and growth.
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Affiliation(s)
- Quanbin Dong
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China
| | - Dongxu Hua
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China
| | - Xiuchao Wang
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China
- Changzhou Medical Center, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Nanjing Medical University, Changzhou 213164, China
| | - Yuwen Jiao
- Changzhou Medical Center, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Nanjing Medical University, Changzhou 213164, China
| | - Lu Liu
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China
| | - Qiufeng Deng
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China
| | - Tingting Wu
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China
| | - Huayiyang Zou
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China
| | - Chen Zhao
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China
| | - Chengkun Wang
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China
| | - Jiafa Reng
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China
| | - Luoyang Ding
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Shixian Hu
- Institute of Precision Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Jing Shi
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China
| | - Yifeng Wang
- Cardiovascular Research Center, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou Municipal Hospital, Suzhou 215006, China
| | - Haifeng Zhang
- Cardiovascular Research Center, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou Municipal Hospital, Suzhou 215006, China
| | - Yanhui Sheng
- Cardiovascular Research Center, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou Municipal Hospital, Suzhou 215006, China
| | - Wei Sun
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China
| | - Yizhao Shen
- College of Animal Science and Technology, Hebei Agricultural University, Baoding 071000, China
| | - Liming Tang
- Changzhou Medical Center, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Nanjing Medical University, Changzhou 213164, China
| | - Xiangqing Kong
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China
- Cardiovascular Research Center, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou Municipal Hospital, Suzhou 215006, China
| | - Lianmin Chen
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 210029, China
- Changzhou Medical Center, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Nanjing Medical University, Changzhou 213164, China
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13
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Liu Z, Wu R, Jiang Y, Qi L, Liu J, Du M, Wang J, Liu L, Feng G, Zhang L. Propelling CuCo-based nanozyme design to new heights through triple enzyme-like power for high-efficiency bacterial eradication. Colloids Surf B Biointerfaces 2024; 233:113644. [PMID: 37979479 DOI: 10.1016/j.colsurfb.2023.113644] [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: 09/21/2023] [Revised: 11/01/2023] [Accepted: 11/09/2023] [Indexed: 11/20/2023]
Abstract
Bacterial infection-related diseases are a serious issue that threatens human health, and it is highly desirable to develop a high-performance antibacterial agent to combat it. Herein, copper/cobalt-based metal sulfide nanoparticles (CCS NPs) as a new kind of antibacterial nanozyme were prepared by a facile hydrothermal method. Owing to its rich chemical states, the CCS NPs with intrinsic peroxidase- and oxidase-like activities could generate reactive oxygen species (ROS) to exert bactericidal capacity. The CCS NPs could also rapidly deplete glutathione (GSH) to aggravate the oxidative stress in bacteria, thus enhancing the sterilization effect. The results showed that, with the assistance of H2O2 at low concentrations, CCS NPs possessing peroxidase-like, oxidase-like, and GSH depletion activities could achieve remarkable antibacterial effects in vitro. The in vivo implantation demonstrated that CCS NPs with triple enzyme-like activities had efficient bacteria elimination and good biocompatibility in treating bacteria-infected wounds, indicating its wide potential application in the non-antibiotic treatment of bacteria-infected wounds.
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Affiliation(s)
- Zheng Liu
- Analytical & Testing Center, West China Hospital & Department of Orthopedics Surgery and Orthopedic Research Institute, Chengdu 610065, China
| | - Ruibang Wu
- Analytical & Testing Center, West China Hospital & Department of Orthopedics Surgery and Orthopedic Research Institute, Chengdu 610065, China
| | - Yulin Jiang
- Analytical & Testing Center, West China Hospital & Department of Orthopedics Surgery and Orthopedic Research Institute, Chengdu 610065, China
| | - Lin Qi
- Analytical & Testing Center, West China Hospital & Department of Orthopedics Surgery and Orthopedic Research Institute, Chengdu 610065, China
| | - Jiangshan Liu
- Analytical & Testing Center, West China Hospital & Department of Orthopedics Surgery and Orthopedic Research Institute, Chengdu 610065, China
| | - Meixuan Du
- Analytical & Testing Center, West China Hospital & Department of Orthopedics Surgery and Orthopedic Research Institute, Chengdu 610065, China
| | - Jing Wang
- Analytical & Testing Center, West China Hospital & Department of Orthopedics Surgery and Orthopedic Research Institute, Chengdu 610065, China
| | - Limin Liu
- Analytical & Testing Center, West China Hospital & Department of Orthopedics Surgery and Orthopedic Research Institute, Chengdu 610065, China
| | - Ganjun Feng
- Analytical & Testing Center, West China Hospital & Department of Orthopedics Surgery and Orthopedic Research Institute, Chengdu 610065, China.
| | - Li Zhang
- Analytical & Testing Center, West China Hospital & Department of Orthopedics Surgery and Orthopedic Research Institute, Chengdu 610065, China.
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14
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Tikhomirova A, Rahman MM, Kidd SP, Ferrero RL, Roujeinikova A. Cysteine and resistance to oxidative stress: implications for virulence and antibiotic resistance. Trends Microbiol 2024; 32:93-104. [PMID: 37479622 DOI: 10.1016/j.tim.2023.06.010] [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: 05/18/2023] [Revised: 06/28/2023] [Accepted: 06/30/2023] [Indexed: 07/23/2023]
Abstract
Reactive oxygen species (ROS), including the superoxide radical anion (O2•-), hydrogen peroxide (H2O2), and the hydroxyl radical (•HO), are inherent components of bacterial metabolism in an aerobic environment. Bacteria also encounter exogenous ROS, such as those produced by the host cells during the respiratory burst. As ROS have the capacity to damage bacterial DNA, proteins, and lipids, detoxification of ROS is critical for bacterial survival. It has been recently recognised that low-molecular-weight (LMW) thiols play a central role in this process. Here, we review the emerging role of cysteine in bacterial resistance to ROS with a link to broader elements of bacterial lifestyle closely associated with cysteine-mediated oxidative stress response, including virulence and antibiotic resistance.
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Affiliation(s)
- Alexandra Tikhomirova
- Monash University, Department of Microbiology, Infection and Immunity Program, Monash Biomedicine Discovery Institute, Melbourne, VIC 3800, Australia
| | - Mohammad M Rahman
- University of Kentucky, Department of Microbiology, Immunology and Molecular Genetics, Lexington, KY, USA
| | - Stephen P Kidd
- University of Adelaide, Department of Molecular and Biomedical Sciences, School of Biological Sciences, Adelaide, SA 5005, Australia; University of Adelaide, Research Centre for Infectious Disease (RCID) and Australian Centre for Antimicrobial Resistance Ecology (ACARE), Adelaide, SA 5005, Australia
| | - Richard L Ferrero
- Monash University, Department of Microbiology, Infection and Immunity Program, Monash Biomedicine Discovery Institute, Melbourne, VIC 3800, Australia; Hudson Institute of Medical Research, Centre for Innate Immunity and Infectious Diseases, Melbourne, VIC 3168, Australia; Monash University, Department of Molecular and Translational Science, Infection and Immunity Program, Monash Biomedicine Discovery Institute, Melbourne, VIC 3800, Australia
| | - Anna Roujeinikova
- Monash University, Department of Microbiology, Infection and Immunity Program, Monash Biomedicine Discovery Institute, Melbourne, VIC 3800, Australia; Monash University, Department of Biochemistry and Molecular Biology, Melbourne, VIC 3800, Australia.
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15
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Negrellos A, Rice AM, Dos Santos PC, King SB. Sulfinamide Formation from the Reaction of Bacillithiol and Nitroxyl. ACS Chem Biol 2023; 18:2524-2534. [PMID: 38012810 PMCID: PMC11229778 DOI: 10.1021/acschembio.3c00526] [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] [Indexed: 11/29/2023]
Abstract
Bacillithiol (BSH) replaces glutathione (GSH) as the most prominent low-molecular-weight thiol in many low G + C gram-positive bacteria. BSH plays roles in metal binding, protein/enzyme regulation, detoxification, redox buffering, and bacterial virulence. Given the small amounts of BSH isolated from natural sources and relatively lengthy chemical syntheses, the reactions of BSH with pertinent reactive oxygen, nitrogen, and sulfur species remain largely unexplored. We prepared BSH and exposed it to nitroxyl (HNO), a reactive nitrogen species that influences bacterial sulfur metabolism. The profile of this reaction was distinct from HNO oxidation of GSH, which yielded mixtures of disulfide and sulfinamide. The reaction of BSH and HNO (generated from Angeli's salt) gives only sulfinamide products, including a newly proposed cyclic sulfinamide. Treatment of a glucosamine-cysteine conjugate, which lacks the malic acid group, with HNO forms disulfide, implicating the malic acid group in sulfinamide formation. This finding supports a mechanism involving the formation of an N-hydroxysulfenamide intermediate that dehydrates to a sulfenium ion that can be trapped by water or internally trapped by an amide nitrogen to give the cyclic sulfinamide. The biological relevance of BSH reactivity toward HNO is provided through in vivo experiments demonstrating that Bacillus subtilis exposed to HNO shows a growth phenotype, and a strain unable to produce BSH shows hypersensitivity toward HNO in minimal medium cultures. Thiol analysis of HNO-exposed cultures shows an overall decrease in reduced BSH levels, which is not accompanied by increased levels of BSSB, supporting a model involving the formation of an oxidized sulfinamide derivative, identified in vivo by high-pressure liquid chromatography/mass spectrometry. Collectively, these findings reveal the unique chemistry and biology of HNO with BSH in bacteria that produce this biothiol.
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Affiliation(s)
- Alberto Negrellos
- Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27107, United States
| | - Allison M Rice
- Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27107, United States
| | - Patricia C Dos Santos
- Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27107, United States
| | - S Bruce King
- Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27107, United States
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16
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Yang Y, Jing J, Fan S, Chen Z, Qu Y. Unraveling the molecular mechanisms of selenite reduction: transcriptomic analysis of Bacillus reveals the key role of sulfur assimilation. Biotechnol Lett 2023; 45:1513-1520. [PMID: 37864746 DOI: 10.1007/s10529-023-03439-y] [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] [Received: 07/30/2023] [Revised: 09/09/2023] [Accepted: 09/18/2023] [Indexed: 10/23/2023]
Abstract
Selenite biotransformation by microorganisms is an effective detoxification and assimilation process. However, current knowledge of the molecular mechanisms of selenite reduction remains circumscribed. Here, the reduction of Se(IV) by a highly selenite-resistant Bacillus sp. SL (up to 50 mM) was systematically analyzed, and the molecular mechanisms of selenite reduction were investigated. Remarkably, 10 mM selenite was entirely transformed by the strain SL within 20 h, demonstrating a faster conversion rate compared to other microorganisms. Furthermore, glutathione (GSH) and exopolysaccharides (EPS) changes were also monitored during the process. Transcriptomic analysis revealed that the genes of ferredoxin-sulfite oxidoreductase (6.82) and sulfate adenylyltransferase (6.32) were significantly upregulated, indicating that the sulfur assimilation pathway is the primary reducing pathway involved in selenite reduction by strain SL. Moreover, key genes associated with NAD(P)/FAD-dependent oxidoreductases and thioredoxin were significantly upregulated. The reduction of Se(IV) was mediated by multiple pathways in strain SL. To our knowledge, this is the initial report to identify the involvement of sulfur assimilation pathway in selenite reduction for bacillus, which is rare in aerobic bacteria.
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Affiliation(s)
- Ying Yang
- State Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education) and Dalian POCT Laboratory, School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, People's Republic of China
| | - Jiawei Jing
- State Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education) and Dalian POCT Laboratory, School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, People's Republic of China
| | - Shuling Fan
- State Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education) and Dalian POCT Laboratory, School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, People's Republic of China
| | - Zhuo Chen
- State Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education) and Dalian POCT Laboratory, School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, People's Republic of China
| | - Yuanyuan Qu
- State Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education) and Dalian POCT Laboratory, School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, People's Republic of China.
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17
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Tian Y, Tian X, Li T, Wang W. Overview of the effects and mechanisms of NO and its donors on biofilms. Crit Rev Food Sci Nutr 2023:1-20. [PMID: 37942962 DOI: 10.1080/10408398.2023.2279687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
Microbial biofilm is undoubtedly a challenging problem in the food industry. It is closely associated with human health and life, being difficult to remove and antibiotic resistance. Therefore, an alternate method to solve these problems is needed. Nitric oxide (NO) as an antimicrobial agent, has shown great potential to disrupt biofilms. However, the extremely short half-life of NO in vivo (2 s) has facilitated the development of relatively more stable NO donors. Recent studies reported that NO could permeate biofilms, causing damage to cellular biomacromolecules, inducing biofilm dispersion by quorum sensing (QS) pathway and reducing intracellular bis-(3'-5')-cyclic dimeric guanosine monophosphate (c-di-GMP) levels, and significantly improving the bactericidal effect without drug resistance. In this review, biofilm hazards and formation processes are presented, and the characteristics and inhibitory effects of NO donors are carefully discussed, with an emphasis on the possible mechanisms of NO resistance to biofilms and some advanced approaches concerning the remediation of NO donor deficiencies. Moreover, the future perspectives, challenges, and limitations of NO donors were summarized comprehensively. On the whole, this review aims to provide the application prospects of NO and its donors in the food industry and to make reliable choices based on these available research results.
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Affiliation(s)
- Yanan Tian
- College of Food Science and Engineering, Tianjin University of Science & Technology, Tianjin, China
| | - Xiaojing Tian
- College of Food Science and Engineering, Tianjin University of Science & Technology, Tianjin, China
| | - Teng Li
- College of Food Science and Engineering, Tianjin University of Science & Technology, Tianjin, China
| | - Wenhang Wang
- College of Food Science and Engineering, Tianjin University of Science & Technology, Tianjin, China
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18
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Wangsanut T, Sukantamala P, Pongpom M. Identification of glutathione metabolic genes from a dimorphic fungus Talaromyces marneffei and their gene expression patterns under different environmental conditions. Sci Rep 2023; 13:13888. [PMID: 37620377 PMCID: PMC10449922 DOI: 10.1038/s41598-023-40932-w] [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] [Received: 05/18/2023] [Accepted: 08/18/2023] [Indexed: 08/26/2023] Open
Abstract
Talaromyces marneffei is a human fungal pathogen that causes endemic opportunistic infections, especially in Southeast Asia. The key virulence factors of T. marneffei are the ability to survive host-derived heat and oxidative stress, and the ability to convert morphology from environmental mold to fission yeast forms during infection. Glutathione metabolism plays an essential role in stress response and cellular development in multiple organisms. However, the role of the glutathione system in T. marneffei is elusive. Here, we identified the genes encoding principal enzymes associated with glutathione metabolism in T. marneffei, including glutathione biosynthetic enzymes (Gcs1 and Gcs2), glutathione peroxidase (Gpx1), glutathione reductase (Glr1), and a family of glutathione S-transferase (Gst). Sequence homology search revealed an extended family of the TmGst proteins, consisting of 20 TmGsts that could be divided into several classes. Expression analysis revealed that cells in conidia, mold, and yeast phases exhibited distinct expression profiles of glutathione-related genes. Also, TmGst genes were highly upregulated in response to hydrogen peroxide and xenobiotic exposure. Altogether, our findings suggest that T. marneffei transcriptionally regulates the glutathione genes under stress conditions in a cell-type-specific manner. This study could aid in understanding the role of glutathione in thermal-induced dimorphism and stress response.
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Affiliation(s)
- Tanaporn Wangsanut
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Panwarit Sukantamala
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Monsicha Pongpom
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
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Dumitrescu DG, Hatzios SK. Emerging roles of low-molecular-weight thiols at the host-microbe interface. Curr Opin Chem Biol 2023; 75:102322. [PMID: 37201290 PMCID: PMC10524283 DOI: 10.1016/j.cbpa.2023.102322] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 04/17/2023] [Accepted: 04/18/2023] [Indexed: 05/20/2023]
Abstract
Low-molecular-weight (LMW) thiols are an abundant class of cysteine-derived small molecules found in all forms of life that maintain reducing conditions within cells. While their contributions to cellular redox homeostasis are well established, LMW thiols can also mediate other aspects of cellular physiology, including intercellular interactions between microbial and host cells. Here we discuss emerging roles for these redox-active metabolites at the host-microbe interface. We begin by providing an overview of chemical and computational approaches to LMW-thiol discovery. Next, we highlight mechanisms of virulence regulation by LMW thiols in infected cells. Finally, we describe how microbial metabolism of these compounds may influence host physiology.
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Affiliation(s)
- Daniel G Dumitrescu
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT, 06520, USA; Department of Chemistry, Yale University, New Haven, CT, 06520, USA; Microbial Sciences Institute, Yale University, West Haven, CT, 06516, USA
| | - Stavroula K Hatzios
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT, 06520, USA; Department of Chemistry, Yale University, New Haven, CT, 06520, USA; Microbial Sciences Institute, Yale University, West Haven, CT, 06516, USA.
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20
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Sahu S, Niranjan R, Priyadarshini R, Lochab B. Benzoxazine-grafted-chitosan biopolymer films with inherent disulfide linkage: Antimicrobial properties. CHEMOSPHERE 2023; 328:138587. [PMID: 37019400 DOI: 10.1016/j.chemosphere.2023.138587] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/31/2023] [Accepted: 04/01/2023] [Indexed: 06/19/2023]
Abstract
Synthesis and fabrication of naturally sourced biopolymers, especially chitosan, grafted with renewable small molecules have recently attracted attention as efficient antimicrobial agents and are highly desired for sustainable material development. Advantageous inherent functionalities in biobased benzoxazine extend the possibility of crosslinking with chitosan which holds immense potential. Herein, a low-temperature, greener facile methodology is adopted for the covalent confinement of benzoxazine monomers bearing aldehyde and disulfide linkages within chitosan to form benzoxazine-grafted-chitosan copolymer films. The association of benzoxazine as Schiff base, hydrogen bonding, and ring-opened structures enabled the exfoliation of chitosan galleries, and such host-guest mediated interactions demonstrated outstanding properties like hydrophobicity, good thermal, and solution stability due to the synergistic effects. Furthermore, the structures empowered excellent bactericidal properties against both E. coli and S. aureus as investigated by GSH loss, live/dead fluorescence microscopy, and morphological alteration on the cell surface by SEM. The work provides the benefits of disulfide-linked benzoxazines on chitosan, offering a promising avenue for general and eco-friendly usage in wound-healing and packaging material.
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Affiliation(s)
- Sangeeta Sahu
- Materials Chemistry Laboratory, Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence, Gautam Buddha Nagar, Uttar Pradesh, 201314, India
| | - Rashmi Niranjan
- Department of Life Sciences, School of Natural Sciences, Shiv Nadar Institution of Eminence, Gautam Buddha Nagar, Uttar Pradesh, 201314, India
| | - Richa Priyadarshini
- Department of Life Sciences, School of Natural Sciences, Shiv Nadar Institution of Eminence, Gautam Buddha Nagar, Uttar Pradesh, 201314, India.
| | - Bimlesh Lochab
- Materials Chemistry Laboratory, Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence, Gautam Buddha Nagar, Uttar Pradesh, 201314, India.
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21
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Zhao F, Xu H, Chen Y, Xiao J, Zhang M, Li Z, Liu J, Qi C. Actinobacillus pleuropneumoniae FliY and YdjN are involved in cysteine/cystine utilization, oxidative resistance, and biofilm formation but are not determinants of virulence. Front Microbiol 2023; 14:1169774. [PMID: 37250053 PMCID: PMC10213525 DOI: 10.3389/fmicb.2023.1169774] [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: 02/20/2023] [Accepted: 04/10/2023] [Indexed: 05/31/2023] Open
Abstract
Introduction Actinobacillus pleuropneumoniae (A. pleuropneumoniae) is a member of Actinobacillus in family Pasteurellaceae. It is the causative agent of porcine pleuropneumonia, which has caused huge economic losses to pig industry over the world. Cysteine is a precursor of many important biomolecules and defense compounds in the cell. However, molecular mechanisms of cysteine transport in A. pleuropneumoniae are unclear. Methods In this study, gene-deleted mutants were generated and investigated, to reveal the roles of potential cysteine/cystine transport proteins FliY and YdjN of A. pleuropneumoniae. Results Our results indicated that the growth of A. pleuropneumoniae was not affected after fliY or ydjN single gene deletion, but absence of both FliY and YdjN decreased the growth ability significantly, when cultured in the chemically defined medium (CDM) supplemented with cysteine or cystine as the only sulfur source. A. pleuropneumoniae double deletion mutant ΔfliYΔydjN showed increased sensitivity to oxidative stress. Besides, trans-complementation of YdjN into ΔfliYΔydjN and wild type leads to increased biofilm formation in CDM. However, the virulence of ΔfliYΔydjN was not attenuated in mice or pigs. Discussion These findings suggest that A. pleuropneumoniae FliY and YdjN are involved in the cysteine/cystine acquisition, oxidative tolerance, and biofilm formation, but not contribute to the pathogenicity of A. pleuropneumoniae.
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22
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Ke L, Wang J, Liu Y, Sun Z, Li Y, Xiao X. Identification of the antibacterial action mechanism of curcumin on Streptococcus mutans through transcriptome profiling. Arch Oral Biol 2023; 149:105655. [PMID: 36842372 DOI: 10.1016/j.archoralbio.2023.105655] [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: 11/28/2022] [Revised: 02/11/2023] [Accepted: 02/13/2023] [Indexed: 02/17/2023]
Abstract
OBJECTIVE The purpose of this study was to explore the effect and mechanism responsible for how curcumin affects the biofilm formation by Streptococcus mutans (S. mutans). DESIGN The antibacterial activity of curcumin was evaluated by measuring the minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC). The mass of the biofilm was measured by crystal violet staining. Transcriptome sequencing was used to obtain all the transcript information associated with the biological activity of curcumin-treated S. mutans. Real-time quantitative PCR (qRT-PCR) was performed to examine the expression levels of related biofilm formation genes. RESULTS The MIC value for curcumin was 64 μM. Curcumin inhibited the formation of a biofilm by S. mutans and degraded mature biofilms. A gene ontology enrichment analysis showed that the DEGs were significantly relevant to biofilm formation. In addition, 17 significantly enriched Kyoto Encyclopedia of Genes and Genomes pathways (p ≤ 0.01) were identified and were potentially associated with the biochemical metabolic processes of S. mutans. DEGs associated with the biofilm formation of S. mutants, including gtfB, gtfC, rgpG, spaP, spxA1, spxA2, bacA, lrgB, and gshAB. The qRT-PCR results were consistent with transcriptome sequencing that the expression levels of gtfB, gtfC, rgpG, and spaP significantly decreased in the curcumin-treated group, whereas the expression levels of spx1, spx2, bacA, lrgB, and gshAB were up-regulated. CONCLUSIONS Curcumin showed marked inhibitory effects against the formation of biofilms by S. mutans and degradation of formed biofilms.
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Affiliation(s)
- Li Ke
- Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China.
| | - Jiajun Wang
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China; Hubei Engineering Center for Infectious Disease Prevention, Control and Treatment, Wuhan, China; Wuhan Research Center for Infectious Diseases and Tumors of the Chinese Academy of Medical Science, Wuhan, China.
| | - Yanhua Liu
- Department of clinical laboratory, Hospital of China University of Geosciences, Wuhan, China.
| | - Zhongyi Sun
- Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China.
| | - Yirong Li
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China; Hubei Engineering Center for Infectious Disease Prevention, Control and Treatment, Wuhan, China; Wuhan Research Center for Infectious Diseases and Tumors of the Chinese Academy of Medical Science, Wuhan, China.
| | - Xiao Xiao
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China; Hubei Engineering Center for Infectious Disease Prevention, Control and Treatment, Wuhan, China; Wuhan Research Center for Infectious Diseases and Tumors of the Chinese Academy of Medical Science, Wuhan, China.
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23
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Solmi L, Rossi FR, Romero FM, Bach-Pages M, Preston GM, Ruiz OA, Gárriz A. Polyamine-mediated mechanisms contribute to oxidative stress tolerance in Pseudomonas syringae. Sci Rep 2023; 13:4279. [PMID: 36922543 PMCID: PMC10017717 DOI: 10.1038/s41598-023-31239-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 03/08/2023] [Indexed: 03/18/2023] Open
Abstract
Bacterial phytopathogens living on the surface or within plant tissues may experience oxidative stress because of the triggered plant defense responses. Although it has been suggested that polyamines can defend bacteria from this stress, the mechanism behind this action is not entirely understood. In this study, we investigated the effects of oxidative stress on the polyamine homeostasis of the plant pathogen Pseudomonas syringae and the functions of these compounds in bacterial stress tolerance. We demonstrated that bacteria respond to H2O2 by increasing the external levels of the polyamine putrescine while maintaining the inner concentrations of this compound as well as the analogue amine spermidine. In line with this, adding exogenous putrescine to media increased bacterial tolerance to H2O2. Deletion of arginine decarboxylase (speA) and ornithine decarboxylate (speC), prevented the synthesis of putrescine and augmented susceptibility to H2O2, whereas targeting spermidine synthesis alone through deletion of spermidine synthase (speE) increased the level of extracellular putrescine and enhanced H2O2 tolerance. Further research demonstrated that the increased tolerance of the ΔspeE mutant correlated with higher expression of H2O2-degrading catalases and enhanced outer cell membrane stability. Thus, this work demonstrates previously unrecognized connections between bacterial defense mechanisms against oxidative stress and the polyamine metabolism.
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Affiliation(s)
- Leandro Solmi
- Instituto Tecnológico de Chascomús (CONICET-UNSAM), Avenida Intendente Marino Km 8.2, Chascomús, CP7130, Buenos Aires, Argentina.,Escuela de Bio y Nanotecnologías (UNSAM), Buenos Aires, Argentina
| | - Franco R Rossi
- Instituto Tecnológico de Chascomús (CONICET-UNSAM), Avenida Intendente Marino Km 8.2, Chascomús, CP7130, Buenos Aires, Argentina.,Escuela de Bio y Nanotecnologías (UNSAM), Buenos Aires, Argentina
| | - Fernando M Romero
- Instituto Tecnológico de Chascomús (CONICET-UNSAM), Avenida Intendente Marino Km 8.2, Chascomús, CP7130, Buenos Aires, Argentina.,Escuela de Bio y Nanotecnologías (UNSAM), Buenos Aires, Argentina
| | | | - Gail M Preston
- Department of Plant Sciences, University of Oxford, Oxford, UK
| | - Oscar A Ruiz
- Instituto Tecnológico de Chascomús (CONICET-UNSAM), Avenida Intendente Marino Km 8.2, Chascomús, CP7130, Buenos Aires, Argentina.,Escuela de Bio y Nanotecnologías (UNSAM), Buenos Aires, Argentina
| | - Andrés Gárriz
- Instituto Tecnológico de Chascomús (CONICET-UNSAM), Avenida Intendente Marino Km 8.2, Chascomús, CP7130, Buenos Aires, Argentina. .,Escuela de Bio y Nanotecnologías (UNSAM), Buenos Aires, Argentina.
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24
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Blot F, Marchix J, Ejarque M, Jimenez S, Meunier A, Keime C, Trottier C, Croyal M, Lapp C, Mahe MM, De Arcangelis A, Gradwohl G. Gut Microbiota Remodeling and Intestinal Adaptation to Lipid Malabsorption After Enteroendocrine Cell Loss in Adult Mice. Cell Mol Gastroenterol Hepatol 2023; 15:1443-1461. [PMID: 36858136 PMCID: PMC10149283 DOI: 10.1016/j.jcmgh.2023.02.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 02/16/2023] [Accepted: 02/16/2023] [Indexed: 03/03/2023]
Abstract
BACKGROUND & AIMS Enteroendocrine cells (EECs) and their hormones are essential regulators of whole-body energy homeostasis. EECs sense luminal nutrients and microbial metabolites and subsequently secrete various hormones acting locally or at a distance. Impaired development of EECs during embryogenesis is life-threatening in newborn mice and humans due to compromised nutrient absorption. However, the physiological importance of the EEC system in adult mice has yet to be directedly studied. Herein, we aimed to determine the long-term consequences of a total loss of EECs in healthy adults on energy metabolism, intestinal transcriptome, and microbiota. METHODS We depleted intestinal EECs by tamoxifen treatment of adult Neurog3fl/fl; Villin-CreERT2 male mice. We studied intestinal cell differentiation, food efficiency, lipid absorption, microbiota composition, fecal metabolites, and transcriptomic responses in the proximal and distal small intestines of mice lacking EECs. We also determined the high-fat diet-induced transcriptomic changes in sorted Neurog3eYFP/+ EECs. RESULTS Induction of EEC deficiency in adults is not life-threatening unless fed with a high-fat diet. Under a standard chow diet, mice lose 10% of weight due to impaired food efficiency. Blood concentrations of cholesterol, triglycerides, and free fatty acids are reduced, and lipid absorption is impaired and delayed in the distal small intestine. Genes controlling lipogenesis, carbohydrate metabolism, and neoglucogenesis are upregulated. Microbiota composition is rapidly altered after EECs depletion and is characterized by decreased a-diversity. Bacteroides and Lactobacillus were progressively enriched, whereas Lachnospiraceae declined without impacting fecal short-chain fatty acid concentrations. CONCLUSIONS EECs are dispensable for survival in adult male mice under a standard chow diet. The absence of EECs impairs intestinal lipid absorption, leading to transcriptomic and metabolic adaptations and remodeling of the gut microbiota.
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Affiliation(s)
- Florence Blot
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France; Institut National de la Santé et de la Recherche Médicale (INSERM) U1258, Illkirch, France; Centre National de Recherche Scientifique (CNRS) UMR7104, Illkirch, France; Université de Strasbourg, Illkirch, France
| | - Justine Marchix
- Nantes Université, CHU Nantes, Inserm, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France
| | - Miriam Ejarque
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France; Institut National de la Santé et de la Recherche Médicale (INSERM) U1258, Illkirch, France; Centre National de Recherche Scientifique (CNRS) UMR7104, Illkirch, France; Université de Strasbourg, Illkirch, France
| | - Sara Jimenez
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France; Institut National de la Santé et de la Recherche Médicale (INSERM) U1258, Illkirch, France; Centre National de Recherche Scientifique (CNRS) UMR7104, Illkirch, France; Université de Strasbourg, Illkirch, France
| | - Aline Meunier
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France; Institut National de la Santé et de la Recherche Médicale (INSERM) U1258, Illkirch, France; Centre National de Recherche Scientifique (CNRS) UMR7104, Illkirch, France; Université de Strasbourg, Illkirch, France
| | - Céline Keime
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France; Institut National de la Santé et de la Recherche Médicale (INSERM) U1258, Illkirch, France; Centre National de Recherche Scientifique (CNRS) UMR7104, Illkirch, France; Université de Strasbourg, Illkirch, France
| | - Camille Trottier
- Nantes Université, CHU Nantes, Inserm, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France
| | - Mikaël Croyal
- L'Institut du Thorax, INSERM UMR_S1087, CNRS UMR_6291, Université de Nantes, Nantes, France; CRNH-Ouest Mass Spectrometry Core Facility, Nantes, France; Nantes Université, CHU Nantes, Inserm, CNRS, SFR Santé, Inserm UMS 016, CNRS UMS 3556, Nantes, France
| | - Céline Lapp
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France; Institut National de la Santé et de la Recherche Médicale (INSERM) U1258, Illkirch, France; Centre National de Recherche Scientifique (CNRS) UMR7104, Illkirch, France; Université de Strasbourg, Illkirch, France
| | - Maxime M Mahe
- Nantes Université, CHU Nantes, Inserm, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Nantes, France; Department of Pediatric General and Thoracic Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio; Department of Pediatrics, University of Cincinnati, Cincinnati, Ohio
| | - Adèle De Arcangelis
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France; Institut National de la Santé et de la Recherche Médicale (INSERM) U1258, Illkirch, France; Centre National de Recherche Scientifique (CNRS) UMR7104, Illkirch, France; Université de Strasbourg, Illkirch, France.
| | - Gérard Gradwohl
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France; Institut National de la Santé et de la Recherche Médicale (INSERM) U1258, Illkirch, France; Centre National de Recherche Scientifique (CNRS) UMR7104, Illkirch, France; Université de Strasbourg, Illkirch, France.
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25
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Tang C, Li J, Shen Y, Liu M, Liu H, Liu H, Xun L, Xia Y. A sulfide-sensor and a sulfane sulfur-sensor collectively regulate sulfur-oxidation for feather degradation by Bacillus licheniformis. Commun Biol 2023; 6:167. [PMID: 36765168 PMCID: PMC9918477 DOI: 10.1038/s42003-023-04538-2] [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: 08/26/2022] [Accepted: 01/27/2023] [Indexed: 02/12/2023] Open
Abstract
Bacillus licheniformis MW3 degrades bird feathers. Feather keratin is rich in cysteine, which is metabolized to produce hazardous sulfide and sulfane sulfur. A challenge to B. licheniformis MW3 growing on feathers is to detoxify them. Here we identified a gene cluster in B. licheniformis MW3 to deal with these toxicity. The cluster contains 11 genes: the first gene yrkD encodes a repressor, the 8th and 9th genes nreB and nreC encode a two-component regulatory system, and the 10th and 11th genes encode sulfide: quinone reductase (SQR) and persulfide oxygenase (PDO). SQR and PDO collectively oxidize sulfide and sulfane sulfur to sulfite. YrkD sensed sulfane sulfur to derepress the 11 genes. The NreBC system sensed sulfide and further amplified the transcription of sqr and pdo. The two regulatory systems synergistically controlled the expression of the gene cluster, which was required for the bacterium to grow on feather. The findings highlight the necessity of removing sulfide and sulfane sulfur during feather degradation and may help with bioremediation of feather waste and sulfide pollution.
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Affiliation(s)
- Chao Tang
- grid.27255.370000 0004 1761 1174State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237 People’s Republic of China
| | - Jingjing Li
- grid.27255.370000 0004 1761 1174State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237 People’s Republic of China ,grid.10388.320000 0001 2240 3300Present Address: Institut für Mikrobiologie & Biotechnologie of Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany
| | - Yuemeng Shen
- grid.27255.370000 0004 1761 1174State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237 People’s Republic of China
| | - Menghui Liu
- grid.27255.370000 0004 1761 1174State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237 People’s Republic of China
| | - Honglei Liu
- grid.27255.370000 0004 1761 1174State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237 People’s Republic of China
| | - Huaiwei Liu
- grid.27255.370000 0004 1761 1174State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237 People’s Republic of China
| | - Luying Xun
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, People's Republic of China. .,School of Molecular Biosciences, Washington State University, Pullman, WA, 99164-7520, USA.
| | - Yongzhen Xia
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, People's Republic of China.
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26
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Park HE, Lee W, Choi S, Jung M, Shin MK, Shin SJ. Modulating macrophage function to reinforce host innate resistance against Mycobacterium avium complex infection. Front Immunol 2022; 13:931876. [PMID: 36505429 PMCID: PMC9730288 DOI: 10.3389/fimmu.2022.931876] [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: 04/29/2022] [Accepted: 10/21/2022] [Indexed: 11/25/2022] Open
Abstract
Mycobacterium avium complex (MAC) is the main causative agent of infectious diseases in humans among nontuberculous mycobacteria (NTM) that are ubiquitous organisms found in environmental media such as soil as well as in domestic and natural waters. MAC is a primary causative agent of NTM-lung disease that threaten immunocompromised or structural lung disease patients. The incidence and the prevalence of M. tuberculosis infection have been reduced, while MAC infections and mortality rates have increased, making it a cause of global health concern. The emergence of drug resistance and the side effects of long-term drug use have led to a poor outcome of treatment regimens against MAC infections. Therefore, the development of host-directed therapy (HDT) has recently gained interest, aiming to accelerate mycobacterial clearance and reversing lung damage by employing the immune system using a novel adjuvant strategy to improve the clinical outcome of MAC infection. Therefore, in this review, we discuss the innate immune responses that contribute to MAC infection focusing on macrophages, chief innate immune cells, and host susceptibility factors in patients. We also discuss potential HDTs that can act on the signaling pathway of macrophages, thereby contributing to antimycobacterial activity as a part of the innate immune response during MAC infection. Furthermore, this review provides new insights into MAC infection control that modulates and enhances macrophage function, promoting host antimicrobial activity in response to potential HDTs and thus presenting a deeper understanding of the interactions between macrophages and MACs during infection.
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Affiliation(s)
- Hyun-Eui Park
- Department of Microbiology and Convergence Medical Science, Institute of Health Sciences, College of Medicine, Gyeongsang National University, Jinju, South Korea
| | - Wonsik Lee
- School of Pharmacy, Sungkyunkwan University, Suwon, South Korea
| | - Sangwon Choi
- Department of Microbiology, Institute for Immunology and Immunological Disease, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul, South Korea
| | - Myunghwan Jung
- Department of Microbiology and Convergence Medical Science, Institute of Health Sciences, College of Medicine, Gyeongsang National University, Jinju, South Korea
| | - Min-Kyoung Shin
- Department of Microbiology and Convergence Medical Science, Institute of Health Sciences, College of Medicine, Gyeongsang National University, Jinju, South Korea,*Correspondence: Min-Kyoung Shin, ; Sung Jae Shin,
| | - Sung Jae Shin
- Department of Microbiology, Institute for Immunology and Immunological Disease, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul, South Korea,*Correspondence: Min-Kyoung Shin, ; Sung Jae Shin,
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27
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The Role of the Glutathione System in Stress Adaptation, Morphogenesis and Virulence of Pathogenic Fungi. Int J Mol Sci 2022; 23:ijms231810645. [PMID: 36142553 PMCID: PMC9500636 DOI: 10.3390/ijms231810645] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/09/2022] [Accepted: 09/10/2022] [Indexed: 11/17/2022] Open
Abstract
Morphogenesis and stress adaptation are key attributes that allow fungal pathogens to thrive and infect human hosts. During infection, many fungal pathogens undergo morphological changes, and this ability is highly linked to virulence. Furthermore, pathogenic fungi have developed multiple antioxidant defenses to cope with the host-derived oxidative stress produced by phagocytes. Glutathione is a major antioxidant that can prevent cellular damage caused by various oxidative stressors. While the role of glutathione in stress detoxification is known, studies of the glutathione system in fungal morphological switching and virulence are lacking. This review explores the role of glutathione metabolism in fungal adaptation to stress, morphogenesis, and virulence. Our comprehensive analysis of the fungal glutathione metabolism reveals that the role of glutathione extends beyond stressful conditions. Collectively, glutathione and glutathione-related proteins are necessary for vitality, cellular development and pathogenesis.
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Abstract
The nasopharynx and the skin are the major oxygen-rich anatomical sites for colonization by the human pathogen Streptococcus pyogenes (group A Streptococcus [GAS]). To establish infection, GAS must survive oxidative stress generated during aerobic metabolism and the release of reactive oxygen species (ROS) by host innate immune cells. Glutathione is the major host antioxidant molecule, while GAS is glutathione auxotrophic. Here, we report the molecular characterization of the ABC transporter substrate binding protein GshT in the GAS glutathione salvage pathway. We demonstrate that glutathione uptake is critical for aerobic growth of GAS and that impaired import of glutathione induces oxidative stress that triggers enhanced production of the reducing equivalent NADPH. Our results highlight the interrelationship between glutathione assimilation, carbohydrate metabolism, virulence factor production, and innate immune evasion. Together, these findings suggest an adaptive strategy employed by extracellular bacterial pathogens to exploit host glutathione stores for their own benefit.
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29
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Georgescu SR, Mitran CI, Mitran MI, Matei C, Popa GL, Erel O, Tampa M. Thiol-Disulfide Homeostasis in Skin Diseases. J Clin Med 2022; 11:jcm11061507. [PMID: 35329832 PMCID: PMC8954849 DOI: 10.3390/jcm11061507] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/06/2022] [Accepted: 03/07/2022] [Indexed: 12/22/2022] Open
Abstract
Oxidative stress represents the imbalance between oxidants and antioxidants and has been associated with a wide range of diseases. Thiols are the most important compounds in antioxidant defense. There is an equilibrium between thiols and their oxidized forms, disulfides, known as dynamic thiol-disulfide homeostasis (TDH). In 2014, Erel and Neselioglu developed a novel automated assay to measure thiol and disulfide levels. Subsequently, many researchers have used this simple, inexpensive and fast method for evaluating TDH in various disorders. We have reviewed the literature on the role of TDH in skin diseases. We identified 26 studies that evaluated TDH in inflammatory diseases (psoriasis, seborrheic dermatitis, atopic dermatitis, vitiligo, acne vulgaris and rosacea), allergic diseases (acute and chronic urticaria) and infectious diseases (warts, pityriasis rosea and tinea versicolor). The results are heterogeneous, but in most cases indicate changes in TDH that shifted toward disulfides or toward thiols, depending on the extent of oxidative damage.
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Affiliation(s)
- Simona Roxana Georgescu
- Department of Dermatology, ‘Carol Davila’ University of Medicine and Pharmacy, 020021 Bucharest, Romania; (S.R.G.); (C.M.); (M.T.)
- Department of Dermatology, ‘Victor Babes’ Clinical Hospital for Infectious Diseases, 030303 Bucharest, Romania
| | - Cristina Iulia Mitran
- Department of Microbiology, ‘Carol Davila’ University of Medicine and Pharmacy, 020021 Bucharest, Romania;
| | - Madalina Irina Mitran
- Department of Microbiology, ‘Carol Davila’ University of Medicine and Pharmacy, 020021 Bucharest, Romania;
- Correspondence: (M.I.M.); (G.L.P.)
| | - Clara Matei
- Department of Dermatology, ‘Carol Davila’ University of Medicine and Pharmacy, 020021 Bucharest, Romania; (S.R.G.); (C.M.); (M.T.)
| | - Gabriela Loredana Popa
- Department of Parasitology, ‘Carol Davila’ University of Medicine and Pharmacy, 020021 Bucharest, Romania
- Correspondence: (M.I.M.); (G.L.P.)
| | - Ozcan Erel
- Biochemistry Laboratory, Ankara City Hospital, Ankara 06800, Turkey;
- Faculty of Medicine, Ankara Yildirim Beyazit University, Ankara 06010, Turkey
| | - Mircea Tampa
- Department of Dermatology, ‘Carol Davila’ University of Medicine and Pharmacy, 020021 Bucharest, Romania; (S.R.G.); (C.M.); (M.T.)
- Department of Dermatology, ‘Victor Babes’ Clinical Hospital for Infectious Diseases, 030303 Bucharest, Romania
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