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Pottker ES, Rodrigues LB, Borges KA, de Souza SO, Furian TQ, Pippi Salle CT, de Souza Moraes HL, do Nascimento VP. Bacteriophages as an alternative for biological control of biofilm-forming Salmonella enterica. FOOD SCI TECHNOL INT 2024; 30:197-206. [PMID: 36529875 DOI: 10.1177/10820132221144341] [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] [Indexed: 12/22/2023]
Abstract
Salmonellosis is one of the most common foodborne diseases worldwide. Surface adherence and biofilm formation are among the main strategies evolved by Salmonella to survive under harsh conditions and are risk factors for its spread through the food chain. Owing to the increase in antimicrobial resistance, there is a growing need to develop other methods to control foodborne pathogens, and bacteriophages have been suggested as a potential alternative for this purpose. The aim of this study was to evaluate bacteriophages as a biological control of Salmonella enterica serotypes to inhibit and remove bacterial biofilms. A total of 12 S. enterica isolates were selected for this study, all of which were biofilm producers. Seven bacteriophages were tested, individually and in a cocktail, for their host range and efficiency of plating (EOP). The phage cocktail was evaluated for its antibiofilm effect against the Salmonella biofilms. Phages UPF_BP1, UPF_BP2, UPF_BP3, UPF_BP6, and 10:2 possessed a broad lytic spectrum and could infect all S. enterica strains. Phages 10:2, UPF_BP6, and UPF_BP3 had high EOP in 10, 9, and 9 out of the 12 S. enterica strains, respectively. The cocktail was able to infect all S. enterica strains and had a high EOP in 10 out of 12 S. enterica isolates, presenting a broader host range than any of the tested single phages. A wide variation of inhibition among strains was observed, ranging from 14.72% to 88.53%. Multidrug-resistant and strong biofilm producer strains showed high biofilm inhibition levels by phage cocktail. Our findings demonstrate the ability of the cocktail to prevent biofilm formation and remove formed biofilms of Salmonella. These results indicate that the phage cocktail is a promising candidate to be used as an alternative for the control of Salmonella biofilms through surface conditioning.
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Affiliation(s)
- Emanuele Serro Pottker
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Laura Beatriz Rodrigues
- Faculdade de Agronomia e Medicina Veterinária, Universidade de Passo Fundo, Passo Fundo, RS, Brazil
| | - Karen Apellanis Borges
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | | | - Thales Quedi Furian
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Carlos Tadeu Pippi Salle
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Hamilton Luiz de Souza Moraes
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Vladimir Pinheiro do Nascimento
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
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2
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Hasanuzzaman M, Bang CS, Gong EJ. Antibiotic Resistance of Helicobacter pylori: Mechanisms and Clinical Implications. J Korean Med Sci 2024; 39:e44. [PMID: 38288543 PMCID: PMC10825452 DOI: 10.3346/jkms.2024.39.e44] [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: 11/08/2023] [Accepted: 12/29/2023] [Indexed: 02/01/2024] Open
Abstract
Helicobacter pylori is a pathogenic bacterium associated with various gastrointestinal diseases, including chronic gastritis, peptic ulcers, mucosa-associated lymphoid tissue lymphoma, and gastric cancer. The increasing rates of H. pylori antibiotic resistance and the emergence of multidrug-resistant strains pose significant challenges to its treatment. This comprehensive review explores the mechanisms underlying the resistance of H. pylori to commonly used antibiotics and the clinical implications of antibiotic resistance. Additionally, potential strategies for overcoming antibiotic resistance are discussed. These approaches aim to improve the treatment outcomes of H. pylori infections while minimizing the development of antibiotic resistance. The continuous evolution of treatment perspectives and ongoing research in this field are crucial for effectively combating this challenging infection.
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Affiliation(s)
- Md Hasanuzzaman
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Chang Seok Bang
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Eun Jeong Gong
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea.
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3
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Anand S, Hallsworth JE, Timmis J, Verstraete W, Casadevall A, Ramos JL, Sood U, Kumar R, Hira P, Dogra Rawat C, Kumar A, Lal S, Lal R, Timmis K. Weaponising microbes for peace. Microb Biotechnol 2023; 16:1091-1111. [PMID: 36880421 DOI: 10.1111/1751-7915.14224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 01/16/2023] [Indexed: 03/08/2023] Open
Abstract
There is much human disadvantage and unmet need in the world, including deficits in basic resources and services considered to be human rights, such as drinking water, sanitation and hygiene, healthy nutrition, access to basic healthcare, and a clean environment. Furthermore, there are substantive asymmetries in the distribution of key resources among peoples. These deficits and asymmetries can lead to local and regional crises among peoples competing for limited resources, which, in turn, can become sources of discontent and conflict. Such conflicts have the potential to escalate into regional wars and even lead to global instability. Ergo: in addition to moral and ethical imperatives to level up, to ensure that all peoples have basic resources and services essential for healthy living and to reduce inequalities, all nations have a self-interest to pursue with determination all available avenues to promote peace through reducing sources of conflicts in the world. Microorganisms and pertinent microbial technologies have unique and exceptional abilities to provide, or contribute to the provision of, basic resources and services that are lacking in many parts of the world, and thereby address key deficits that might constitute sources of conflict. However, the deployment of such technologies to this end is seriously underexploited. Here, we highlight some of the key available and emerging technologies that demand greater consideration and exploitation in endeavours to eliminate unnecessary deprivations, enable healthy lives of all and remove preventable grounds for competition over limited resources that can escalate into conflicts in the world. We exhort central actors: microbiologists, funding agencies and philanthropic organisations, politicians worldwide and international governmental and non-governmental organisations, to engage - in full partnership - with all relevant stakeholders, to 'weaponise' microbes and microbial technologies to fight resource deficits and asymmetries, in particular among the most vulnerable populations, and thereby create humanitarian conditions more conducive to harmony and peace.
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Affiliation(s)
- Shailly Anand
- Department of Zoology, Deen Dayal Upadhyaya College, University of Delhi, Delhi, India
| | - John E Hallsworth
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast, UK
| | - James Timmis
- Athena Institute for Research on Innovation and Communication in Health and Life Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Willy Verstraete
- Center for Microbial Ecology and Technology (CMET), Ghent University, Ghent, Belgium
| | - Arturo Casadevall
- Department of Medicine, Johns Hopkins School of Public Health and School of Medicine, Baltimore, Maryland, USA
| | | | - Utkarsh Sood
- Department of Zoology, Kirori Mal College, University of Delhi, Delhi, India
| | - Roshan Kumar
- Post-Graduate Department of Zoology, Magadh University, Bodh Gaya, Bihar, India
| | - Princy Hira
- Department of Zoology, Maitreyi College, University of Delhi, New Delhi, India
| | - Charu Dogra Rawat
- Department of Zoology, Ramjas College, University of Delhi, Delhi, India
| | - Abhilash Kumar
- Department of Zoology, Ramjas College, University of Delhi, Delhi, India
| | - Sukanya Lal
- PhiXgen Pvt. Ltd, Gurugram, Gurgaon, Haryana, India
| | - Rup Lal
- Acharya Narendra Dev College, University of Delhi, Govindpuri, Kalkaji, New Delhi, India
| | - Kenneth Timmis
- Institute of Microbiology, Technical University Braunschweig, Braunschweig, Germany
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4
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Cui ZH, He HL, Wu SB, Dong CL, Lu SY, Shan TJ, Fang LX, Liao XP, Liu YH, Sun J. Rapid Screening of Essential Oils as Substances Which Enhance Antibiotic Activity Using a Modified Well Diffusion Method. Antibiotics (Basel) 2021; 10:antibiotics10040463. [PMID: 33923861 PMCID: PMC8072922 DOI: 10.3390/antibiotics10040463] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/15/2021] [Accepted: 04/15/2021] [Indexed: 11/30/2022] Open
Abstract
Antimicrobial resistance is recognized as one of the major global health challenges of the 21st century. Synergistic combinations for antimicrobial therapies can be a good strategy for the treatment of multidrug resistant infections. We examined the ability of a group of 29 plant essential oils as substances which enhance the antibiotic activity. We used a modified well diffusion method to establish a high-throughput screening method for easy and rapid identification of high-level enhancement combinations against bacteria. We found that 25 essential oils possessed antibacterial activity against Escherichia Coli ATCC 25922 and methicillin-resistant Staphylococcus aureus (MRSA) 43300 with MICs that ranged from 0.01% to 2.5% v/v. We examined 319 (11 × 29) combinations in a checkerboard assay with E. Coli ATCC 25922 and MRSA 43300, and the result showed that high-level enhancement combinations were 48 and 44, low-level enhancement combinations were 214 and 211, and no effects combinations were 57 and 64, respectively. For further verification we randomly chose six combinations that included orange and Petitgrain essential oils in a standard time-killing assay. The results are in great agreement with those of the well diffusion assays. Therefore, the modified diffusion method was a rapid and effective method to screen high-level enhancement combinations of antibiotics and essential oils.
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Affiliation(s)
- Ze-Hua Cui
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou 510642, China; (Z.-H.C.); (H.-L.H.); (S.-B.W.); (S.-Y.L.); (L.-X.F.); (X.-P.L.); (Y.-H.L.)
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou 510642, China
| | - Hui-Ling He
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou 510642, China; (Z.-H.C.); (H.-L.H.); (S.-B.W.); (S.-Y.L.); (L.-X.F.); (X.-P.L.); (Y.-H.L.)
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou 510642, China
| | - Shuai-Bin Wu
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou 510642, China; (Z.-H.C.); (H.-L.H.); (S.-B.W.); (S.-Y.L.); (L.-X.F.); (X.-P.L.); (Y.-H.L.)
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou 510642, China
| | - Chun-Liu Dong
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China;
| | - Si-Ya Lu
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou 510642, China; (Z.-H.C.); (H.-L.H.); (S.-B.W.); (S.-Y.L.); (L.-X.F.); (X.-P.L.); (Y.-H.L.)
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou 510642, China
| | - Ti-Jiang Shan
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China;
| | - Liang-Xing Fang
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou 510642, China; (Z.-H.C.); (H.-L.H.); (S.-B.W.); (S.-Y.L.); (L.-X.F.); (X.-P.L.); (Y.-H.L.)
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou 510642, China
| | - Xiao-Ping Liao
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou 510642, China; (Z.-H.C.); (H.-L.H.); (S.-B.W.); (S.-Y.L.); (L.-X.F.); (X.-P.L.); (Y.-H.L.)
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
| | - Ya-Hong Liu
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou 510642, China; (Z.-H.C.); (H.-L.H.); (S.-B.W.); (S.-Y.L.); (L.-X.F.); (X.-P.L.); (Y.-H.L.)
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
| | - Jian Sun
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou 510642, China; (Z.-H.C.); (H.-L.H.); (S.-B.W.); (S.-Y.L.); (L.-X.F.); (X.-P.L.); (Y.-H.L.)
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
- Correspondence:
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5
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Muñoz AB, Stepanian J, Trespalacios AA, Vale FF. Bacteriophages of Helicobacter pylori. Front Microbiol 2020; 11:549084. [PMID: 33281754 PMCID: PMC7688985 DOI: 10.3389/fmicb.2020.549084] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Accepted: 10/21/2020] [Indexed: 12/12/2022] Open
Abstract
The bacterium Helicobacter pylori colonize the stomach in approximately half of the world’s population. Infection with this bacterium is associated with gastritis, peptic ulcer, adenocarcinoma, and gastric mucosa-associated lymphoid tissue lymphoma. Besides being a pathogen with worldwide prevalence, H. pylori show increasingly high antibiotic resistance rates, making the development of new therapeutic strategies against this bacterium challenging. Furthermore, H. pylori is a genetically diverse bacterium, which may be influenced by the presence of mobile genomic elements, including prophages. In this review, we analyze these issues and summarize various reports and findings related to phages and H. pylori, discussing the relationship between the presence of these elements and the genomic diversity, virulence, and fitness of this bacterium. We also analyze the state of the knowledge on the potential utility of bacteriophages as a therapeutic strategy for H. pylori.
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Affiliation(s)
- Angela B Muñoz
- Infectious Diseases Research Group, Microbiology Department, Sciences Faculty, Pontificia Universidad Javeriana, Bogotá, Colombia.,Host-Pathogen Interactions Unit, Research Institute for Medicines (iMed-ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Lisbon, Portugal
| | - Johanna Stepanian
- Infectious Diseases Research Group, Microbiology Department, Sciences Faculty, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Alba Alicia Trespalacios
- Infectious Diseases Research Group, Microbiology Department, Sciences Faculty, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Filipa F Vale
- Host-Pathogen Interactions Unit, Research Institute for Medicines (iMed-ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Lisbon, Portugal
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6
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Rizzo NN, Pottker ES, Webber B, Borges KA, Duarte SC, Levandowski R, Ruschel LR, Rodrigues LB. Effect of two lytic bacteriophages against multidrug-resistant and biofilm-forming Salmonella Gallinarum from poultry. Br Poult Sci 2020; 61:640-645. [PMID: 32901508 DOI: 10.1080/00071668.2020.1805724] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
1. Salmonella Gallinarum (SG) infections cause fowl typhoid, which leads to important economic losses. Multidrug resistance (MDR) and the capacity for bacteria to form biofilms could play an important role in the persistence of SG in poultry flocks resulting in intermittent disease outbreaks. The aim of the following study was to assess the lytic activity of two new bacteriophages (Salmonella phages UPF_BP1 and UPF_BP2) against MDR and biofilm-forming SG. 2. Forty-six strains of SG, isolated in 2015, were characterised by antimicrobial resistance, biofilm formation profiles and susceptibility to two new bacteriophages. 3. Of these strains, 24% were multidrug resistant and more than 80% formed biofilm, with no statistical difference between incubation temperatures (42°C or 22°C). With regard to the lytic activity of the phages, 85% of strains were susceptible to at least one phage. Of these, 74% were lysed by both phages, including MDR and biofilm producing strains. 4. The use of salmonella phages UPF_BP1 and UPF_BP2 were shown to be promising alternatives for the biological control of fowl typhoid.
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Affiliation(s)
- N N Rizzo
- Faculdade De Agronomia E Medicina Veterinária, Universidade De Passo Fundo , Passo Fundo, RS, Brazil.,Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal Do Rio Grande Do Sul , Porto Alegre, RS, Brazil
| | - E S Pottker
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal Do Rio Grande Do Sul , Porto Alegre, RS, Brazil
| | - B Webber
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal Do Rio Grande Do Sul , Porto Alegre, RS, Brazil
| | - K A Borges
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal Do Rio Grande Do Sul , Porto Alegre, RS, Brazil
| | - S C Duarte
- Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Suínos e Aves , Concórdia, SC, Brazil
| | - R Levandowski
- Faculdade De Agronomia E Medicina Veterinária, Universidade De Passo Fundo , Passo Fundo, RS, Brazil
| | - L R Ruschel
- Faculdade De Agronomia E Medicina Veterinária, Universidade De Passo Fundo , Passo Fundo, RS, Brazil
| | - L B Rodrigues
- Faculdade De Agronomia E Medicina Veterinária, Universidade De Passo Fundo , Passo Fundo, RS, Brazil
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7
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Wang C, Li P, Zhu Y, Huang Y, Gao M, Yuan X, Niu W, Liu H, Fan H, Qin Y, Tong Y, Mi Z, Bai C. Identification of a Novel Acinetobacter baumannii Phage-Derived Depolymerase and Its Therapeutic Application in Mice. Front Microbiol 2020; 11:1407. [PMID: 32903329 PMCID: PMC7396526 DOI: 10.3389/fmicb.2020.01407] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 05/29/2020] [Indexed: 12/02/2022] Open
Abstract
The rapid expansion of Acinetobacter baumannii clinical isolates exhibiting resistance to most or all available antibiotics is a global concern. Current treatments for infections caused by this bacterium have become less effective, and the need to explore new alternative therapies is urgent. Depolymerases derived from phages are emerging as attractive anti-virulence agents. In this study, a previously isolated A. baumannii phage (designated as vB_AbaM_IME285) was characterized, and genomic study was carried out using various bioinformatics tools. A gene predicted as encoding for the depolymerase was cloned and expressed, and the depolymerase activity of the recombinant enzyme (Dp49) was identified both in vitro and in experimental mice. The results showed that phage IME285 formed translucent halos around the plaques when inoculated onto a lawn of the host bacteria, exibiting depolymerase activity against this strain. On the basis of complete genome sequencing and bioinformatics analysis, ORF49 was speculated to be a gene encoding for the putative capsule depolymerase. The expressed recombinant Dp49 displayed an effective depolymerase activity and had a spectrum of activity similar to its parental phage IME285, which was active against 25 out of 49 A. baumannii strains. It was found that Dp49 greatly improved the inhibitory effect of serum on bacterial growth in vitro, and the administration of this enzyme significantly increased the survival rates of A. baumannii-infected mice in the animal experiment. In conclusion, the phage-encoded depolymerase Dp49 might be a promising alternative means of controlling infections mediated by multidrug-resistant A. baumannii.
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Affiliation(s)
- Can Wang
- Department of Respiratory Medicine, Fuyang Hospital of Anhui Medical University, Anhui, China
| | - Puyuan Li
- Department of Respiratory and Critical Care Diseases, The Fifth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Yang Zhu
- Department of Respiratory Medicine, Fuyang Hospital of Anhui Medical University, Anhui, China
| | - Yong Huang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Mingming Gao
- Department of Respiratory and Critical Care Diseases, The Fifth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Xin Yuan
- Department of Respiratory and Critical Care Diseases, The Fifth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Wenkai Niu
- Department of Respiratory and Critical Care Diseases, The Fifth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Huiying Liu
- Department of Respiratory and Critical Care Diseases, The Fifth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Hang Fan
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Yanhong Qin
- Department of Respiratory and Critical Care Diseases, The Fifth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Yigang Tong
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Zhiqiang Mi
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Changqing Bai
- Department of Respiratory and Critical Care Diseases, The Fifth Medical Center of Chinese PLA General Hospital, Beijing, China.,Department of Respiratory and Critical Care Diseases, General Hospital of Shenzhen University, Shenzhen, China
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8
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Husain FM, Ansari AA, Khan A, Ahmad N, Albadri A, Albalawi TH. Mitigation of acyl-homoserine lactone (AHL) based bacterial quorum sensing, virulence functions, and biofilm formation by yttrium oxide core/shell nanospheres: Novel approach to combat drug resistance. Sci Rep 2019; 9:18476. [PMID: 31811221 PMCID: PMC6898131 DOI: 10.1038/s41598-019-53920-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 10/28/2019] [Indexed: 11/21/2022] Open
Abstract
The present study evaluated the efficacy of Y2O3:Tb (core) and Y2O3:Tb@SiO2 nanospheres (core/shell NSs) against virulence functions regulated by quorum sensing (QS) and biofilm formation in pathogenic bacteria. Scanning electron microscope (SEM) images were used to study the size, shape, and morphology. The images clearly displayed spherical shaped, mono-dispersed particles with narrow size distribution and an average grain size of 110-130 nm. The chemical composition of the samples was determined by using energy dispersive X-ray (EDX) and X-ray photoelectron spectroscopy (XPS). We determined the impact of core and core/shell NSs on QS using sensor strains of Chromobacterium violaceum CVO26 and Pseudomonas aeruginosa PAO1 in a comparative study. Sub-MICs of core and core/shell NSs substantially suppressed QS-controlled violacein production in C. violaceum. Similar concentration-dependent effect of sub-MICs of synthesized core and core/shell NSs was observed in the QS-regulated virulence functions (elastase, total protease, pyocyanin production, swarming motility, and exopolysaccharide production) in PAO1. A concentration-dependent decrease (14-60%) was recorded in the biofilm forming capability of PAO1, upon treatment with core and core/shell NSs. Moreover, core/shell NSs were more effective in inhibiting biofilm at higher tested concentrations as compared to core-NSs. The synthesized NSs demonstrated significantly impaired attachment of cells to the microtiter plate indicating that NSs target biofilm inhibition at the attachment stage. Based on these results, we predict that core and core/shell NSs may be an alternative to combat the threat of drug-resistant pathogenic bacteria.
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Affiliation(s)
- Fohad Mabood Husain
- Department of Food Science and Nutrition, College of Food and Agriculture Sciences, King Saud University, Riyadh, 11451, Saudi Arabia.
| | - Anees A Ansari
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, 11451, Saudi Arabia.
| | - Aslam Khan
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Naushad Ahmad
- Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Abdulrahman Albadri
- National Center for Nanotechnology and Advanced Materials, King Abdulaziz City for Science & Technology, Riyadh, 11442, Saudi Arabia
| | - Thamer H Albalawi
- Department of Biology, College of Science and Humanities, Prince Sattam bin Abdulaziz University, Alkharj, 11942, Kingdom of Saudi Arabia
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9
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Timmis K, Cavicchioli R, Garcia JL, Nogales B, Chavarría M, Stein L, McGenity TJ, Webster N, Singh BK, Handelsman J, de Lorenzo V, Pruzzo C, Timmis J, Martín JLR, Verstraete W, Jetten M, Danchin A, Huang W, Gilbert J, Lal R, Santos H, Lee SY, Sessitsch A, Bonfante P, Gram L, Lin RTP, Ron E, Karahan ZC, van der Meer JR, Artunkal S, Jahn D, Harper L. The urgent need for microbiology literacy in society. Environ Microbiol 2019; 21:1513-1528. [PMID: 30912268 DOI: 10.1111/1462-2920.14611] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 03/24/2019] [Accepted: 03/24/2019] [Indexed: 12/16/2022]
Affiliation(s)
- Kenneth Timmis
- Institute of Microbiology, Technical University Braunschweig, Germany
| | - Ricardo Cavicchioli
- School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, Australia
| | - José Luis Garcia
- Department of Environmental Biology, Centro de Investigaciones Biológicas (CIB) (CSIC), Madrid, Spain
| | - Balbina Nogales
- Grupo de Microbiologia, Dept. Biologia, Universitat de les Illes Balears, and Instituto Mediterráneo de Estudios Avanzados 8IMEDEA, UIB-CSIC), Palma de Mallorca, Spain
| | - Max Chavarría
- Escuela de Química, Centro de Investigaciones en Productos Naturales (CIPRONA), Universidad de Costa Rica, San José, Costa Rica & Centro Nacional de Innovaciones Biotecnológicas (CENIBiot), CeNAT-CONARE, San José, Costa Rica
| | - Lisa Stein
- Department of Biological Sciences, University of Alberta, Edmonton, Canada
| | - Terry J McGenity
- School of Biological Sciences, University of Essex, Colchester, UK
| | - Nicole Webster
- Australian Institute of Marine Science, Townsville and Australian Centre for Ecogenomics, University of Queensland, Brisbane, Queensland, Australia
| | - Brajesh K Singh
- Hawkesbury Institute for the Environment, University of Western Sydney, Penrith, Australia
| | - Jo Handelsman
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, WI, USA
| | - Victor de Lorenzo
- Systems Biology Program, Centro Nacional de Biotecnologia, CSIC, Madrid, Spain
| | - Carla Pruzzo
- Dipartimento di Scienze della Terra, dell'Ambiente e della Vita (DISTAV), Università degli Studi di Genova, Italy
| | - James Timmis
- Athena Institute, Vrije Universiteit Amsterdam, The Netherlands
| | | | - Willy Verstraete
- Center for Microbial Ecology and Technology (CMET), Ghent University, Belgium
| | - Mike Jetten
- Department of Microbiology, Radboud University Nijmegen, The Netherlands
| | - Antoine Danchin
- Institut Cochin INSERM U1016, CNRS UMR8104, Université Paris Descartes, Paris, France
| | - Wei Huang
- Department of Engineering Science, University of Oxford, Oxford, UK
| | - Jack Gilbert
- Dept. of Pediatrics, University of California at San Diego, San Diego, CA, USA
| | - Rup Lal
- Department of Zoology, Molecular Biology Laboratory, University of Delhi, Delhi, India
| | - Helena Santos
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Oeiras, Portugal
| | - Sang Yup Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Angela Sessitsch
- Bioresources Unit, AIT Austrian Institute of Technology, Tulln, Austria
| | - Paola Bonfante
- Department of Life Science and Systems Biology, University of Torino, Italy
| | - Lone Gram
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark
| | - Raymond T P Lin
- Department of Microbiology and Immunology, National University of Singapore, Singapore
| | - Eliora Ron
- School of Molecular Cell Biology & Biotechnology, Tel Aviv University, Israel
| | - Z Ceren Karahan
- Department of Medical Microbiology, Ankara University, Turkey
| | | | - Seza Artunkal
- Department of Clinical Microbiology, Haydarpaşa Numune Training Hospital, lstanbul, Turkey
| | - Dieter Jahn
- Institute of Microbiology, Technical University Braunschweig, Germany
| | - Lucy Harper
- Society for Applied Microbiology, London, UK
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Raj GM. Commentary to "Patients not patents: drug research and development as a public enterprise". Eur J Clin Invest 2018; 48. [PMID: 29281851 DOI: 10.1111/eci.12882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 12/19/2017] [Indexed: 11/26/2022]
Affiliation(s)
- Gerard Marshall Raj
- Department of Pharmacology, Sri Venkateshwaraa Medical College Hospital and Research Centre, Puducherry, India
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11
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Brüssow H. Infection therapy: the problem of drug resistance - and possible solutions. Microb Biotechnol 2017; 10:1041-1046. [PMID: 28737021 PMCID: PMC5609240 DOI: 10.1111/1751-7915.12777] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 06/20/2017] [Indexed: 11/30/2022] Open
Abstract
The rising antibiotic resistance in major bacterial pathogens together with the breakdown of the antibiotic discovery platform creates a critical situation for infection therapy. Recent developments reviving new antibiotic discovery from defining chemical rules for membrane-passing compounds to isolation chips for soil bacteria and exploring the human microbiome for antibiotic-producing bacteria are discussed. The potential of bacteriocins, tailocins, phage lysins, phages, probiotics and commensal blends as alternatives to antibiotics is evaluated.
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Affiliation(s)
- Harald Brüssow
- Department of Gut EcologyHost‐Microbe Interaction GroupNestlé Research CenterLausanneSwitzerland
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12
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Timmis JK, Timmis K. The DIY Digital Medical Centre. Microb Biotechnol 2017; 10:1084-1093. [PMID: 28840966 PMCID: PMC5609225 DOI: 10.1111/1751-7915.12817] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 07/13/2017] [Indexed: 01/09/2023] Open
Abstract
Healthcare systems worldwide are confronted with major economic, organizational and logistical challenges. Historic evolution of health care has led to significant healthcare sector fragmentation, resulting in systemic inefficiencies and suboptimal resource exploitation. To attain a sustainable healthcare model, fundamental, system-wide improvements that effectively network, and ensure fulfilment of potential synergies between sectors, and include and facilitate coherent strategic planning and organisation of healthcare infrastructure are needed. Critically, they must be specifically designed to sustainably achieve peak performance within the current policy environment for cost-control, and efficiency and quality improvement for service delivery. We propose creation of a new healthcare cluster, to be embedded in existing healthcare systems. It consists of (i) local 24/7 walk-in virtually autonomous do-it-yourself Digital Medical Centres performing routine diagnosis, monitoring, prevention, treatment and standardized documentation and health outcome assessment/reporting, which are online interfaced with (ii) regional 24/7 eClinician Centres providing on-demand clinical supervision/assistance to Digital Medical Centre patients. Both of these are, in turn, online interfaced with (iii) the National Clinical Informatics Centre, which houses the national patient data centre (cloud) and data analysis units that conduct patient- and population-level, personalized and predictive(-medicine) intervention optimization analyses. The National Clinical Informatics Centre also interfaces with biomedical research and prioritizes and accelerates the translation of new discoveries into clinical practice. The associated Health Policy Innovation and Evaluation Centre rapidly integrates new findings with health policy/regulatory discussions. This new cluster would synergistically link all health system components in a circular format, enable not only access by all arms of the health service to latest patient data, but also automatic algorithm analysis and prediction of clinical development of individual patients, reduce bureaucratic burden on medical professionals by enabling a greater level of focus of their expertise on non-routine medical tasks, lead to automatic translation of aggregate patient data/new knowledge into medical practice, and orient future evolution of health systems towards greater cohesion/integration and hence efficiency. A central plank of the proposed concept is increased emphasis on reduction of disease incidence and severity, to diminish both patient suffering and treatment costs. This will be achieved at the individual and population levels, through (i) significantly improved access to medical services, (ii) stronger focus on primary and secondary prevention and early treatment measures, and disease susceptibility prediction via personalized medicine, involving inter alia genome analysis at birth and periodic analysis of microbiomes and biomarkers, and integration with other patient health and epidemiology parameters, (iii) improved surveillance and (iv) intervention outcome benchmarking. The dMCs will become drivers of innovation and integrative evolution in health systems, of disease reduction and efficiency gains, and thus major contributors to development of sustainability of health care.
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Affiliation(s)
- James Kenneth Timmis
- Student MSc Health PolicyDepartment of Surgery and CancerImperial College LondonLondonUK
| | - Kenneth Timmis
- Department of MicrobiologyTechnical University of BraunschweigBraunschweigGermany
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