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Bolhuis H, Grego M. Cryopreservation and recovery of a complex hypersaline microbial mat community. Cryobiology 2024; 114:104859. [PMID: 38336089 DOI: 10.1016/j.cryobiol.2024.104859] [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: 11/07/2023] [Revised: 01/15/2024] [Accepted: 02/04/2024] [Indexed: 02/12/2024]
Abstract
Cryopreservation of microorganisms is an essential tool in industrial- and food applications where conservation of microbial activity and critical beneficial traits need to be guaranteed to provide a consistent product or production process. This often refers to simple, single species or low diversity assemblages in liquid cultures that can easily be revived and regrown to perform the desired process. Cryopreservation is also of essence for scientific experimentation where many environmental samples are taken in remote sampling sites and at high costs. Biobanking, or the long term preservation and potential revival of complex, structured samples come with an additional challenge related to maintaining the structure upon revival. Here we look at cryopreserving and reviving a complex photosynthesis driven microbial mat from a hypersaline ecosystem. Amplicon sequencing of the 16S and 18S ribosomal RNA gene was used to determine the community composition of bacteria and eukaryotes respectively. The tests included the use of different cryopreservative agents and different times of cryopreservation at -150 °C. Upon revival, the cryopreservatives cannot be separated from the preserved samples without disturbing the community structure, while carryover of these compounds may influence reconstitution of the communities. Indeed, although both glycerol and Me2SO are good cryopreservatives of microbial assemblages, carryover of these compounds had a profound negative effect on the reestablishment of a functional microbial mat. Best cryopreservation and reconstitution results were obtained in the absence of a cryopreservative agent or when methanol was used.
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Affiliation(s)
- Henk Bolhuis
- Department of Marine Microbiology and Biogeochemistry, Royal Netherlands Institute for Sea Research (NIOZ), Den Hoorn, the Netherlands.
| | - Michele Grego
- Department of Marine Microbiology and Biogeochemistry, Royal Netherlands Institute for Sea Research (NIOZ), Den Hoorn, the Netherlands.
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Córdova-González D, Alfonseca-Silva E, Gutiérrez L, Tapia-Pérez G, Sumano H. Intramammary preparation of enrofloxacin hydrochloride-dihydrate for bovine mastitis (biofilm-forming Staphylococcus aureus). J Vet Sci 2024; 25:e6. [PMID: 38311321 PMCID: PMC10839182 DOI: 10.4142/jvs.23245] [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: 10/05/2023] [Revised: 11/07/2023] [Accepted: 11/14/2023] [Indexed: 02/07/2024] Open
Abstract
BACKGROUND Chronic bovine mastitis is linked to biofilm-producing Staphylococcus aureus (bp-Sa) or Staphylococcus coagulase-negative (bp-Scn). OBJECTIVES Bp-Sa and bp-Scn were treated with intramammary preparations of either enrofloxacin HCl·2H2O-dimethyl-sulfoxide-chitosan (enro-C/DMSO/chitosan) or enro-C alone. Their potential to inhibit and degrade biofilm formation in vitro was also assessed. METHODS Milk samples were obtained from the affected quarters in a herd. Phenotypical and genotypical identifications as biofilm-producing Staphylococcus species were carried out. Enro-C/DMSO/chitosan and enro-C alone were assessed to determine their in vitro efficacy in interfering with biofilm formation and their bactericidal effects. A prolonged eight-day treatment with a twice-daily intramammary insertion of 10 mL of enro-C/DMSO/chitosan or enro-C alone was set to evaluate the clinical and bacteriological cures on day 10 in 15 cows per group and the biofilm-inhibiting ability. RESULTS Fifty-seven percent of the isolates were identified as Staphylococcus spp., of which 50% were bp-Sa, 46% bp-Scn, and 4% Staphylococcus pseudintermedius. One hundred percent of the S. aureus isolated and 77% of Staphylococcus coagulase-negative were biofilm producers. In both groups, the icaA and icaD biofilm-producing genes were identified. The experimental preparation could inhibit biofilm formation, degrade mature biofilms, and have well-defined microbicidal effects on planktonic and biofilm bacteria. The respective clinical and bacteriological cure rates were 100% and 80% for enro-C/DMSO/chitosan and 41.7% and 25% for enro-C alone. CONCLUSIONS Enro-C/DMSO/chitosan eliminates bp-Sa and bp-Scn from cases of chronic bovine mastitis.
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Affiliation(s)
- Diana Córdova-González
- Departamento de Fisiología y Farmacología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, México City 04510, México
| | - Edgar Alfonseca-Silva
- Departamento de Microbiología e Inmunología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, México City 04510, México
| | - Lilia Gutiérrez
- Departamento de Fisiología y Farmacología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, México City 04510, México
| | - Graciela Tapia-Pérez
- Departamento de Genética y Bioestadística, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, México City 04510, México
| | - Héctor Sumano
- Departamento de Fisiología y Farmacología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, México City 04510, México.
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Hopfgartner T, Brown JA, Adams MN, Werre SR. Comparison of equine paranasal sinus trephination complications and outcome following standing computed tomography, radiography and sinoscopy guided approaches for the treatment of sinusitis. Vet Surg 2024; 53:54-66. [PMID: 37602997 DOI: 10.1111/vsu.14013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 07/07/2023] [Accepted: 07/31/2023] [Indexed: 08/22/2023]
Abstract
OBJECTIVE The recent availability of standing computed tomography (CT) for equine paranasal sinus disease has enhanced diagnosis and enabled more targeted surgery compared to radiography and sinoscopy. To date, there have been no studies which have critically evaluated the benefit of preoperative CT versus radiography and sinoscopy on complications and outcome in horses undergoing sinus trephination. STUDY DESIGN Retrospective study. ANIMALS A total of 229 equids. METHODS The medical records of equids (229) presented for sinusitis treated via trephination that had CT, radiography and/or sinoscopy at time of surgery between 2009 and 2022 were reviewed. Outcome and complications were evaluated for six different pre- and intraoperative imaging modalities. RESULTS The six groups did not differ in demographics or disease category, though equids with less weight (p = .0179) and shorter disease duration (p = .0075) were more likely to have radiography and sinoscopy based surgical planning. Short-term postoperative complications occurred in 30.1% and were higher in groups using preoperative CT imaging (p = .01), with hemorrhage being the most common surgical complication. Following initial trephination surgery, 57.0% (127/223) of cases resolved and there was no difference between the imaging groups. Final resolution after follow-up medical or surgical treatment increased to 94.6% (211/223) and was not different between the imaging groups or between primary or secondary sinusitis. Additional nasal fenestrations to improve sinonasal drainage, maxillary septal bulla fenestrations and trephinations to treat nasal conchal bullae were made in the CT groups. CLINICAL SIGNIFICANCE CT provided additional diagnostic information and enabled different surgical approaches but did not improve resolution in this study population.
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Affiliation(s)
- Teresa Hopfgartner
- Department of Large Animal Clinical Sciences, Marion duPont Scott Equine Medical Center, Virginia - Maryland Regional College of Veterinary Medicine, Leesburg, Virginia, USA
| | - James A Brown
- Department of Large Animal Clinical Sciences, Marion duPont Scott Equine Medical Center, Virginia - Maryland Regional College of Veterinary Medicine, Leesburg, Virginia, USA
- School of Veterinary Medicine, Texas Tech University, Amarillo, Texas, USA
| | - M Norris Adams
- Department of Large Animal Clinical Sciences, Marion duPont Scott Equine Medical Center, Virginia - Maryland Regional College of Veterinary Medicine, Leesburg, Virginia, USA
| | - Stephen R Werre
- Population Health Sciences, Virginia-Maryland Regional College of Veterinary Medicine, Blacksburg, Virginia, USA
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Shrestha O, Shrestha N, Khanal S, Pokhrel S, Maharjan S, Thapa TB, Khanal PR, Joshi G. Inhibition and Reduction of Biofilm Production along with Their Antibiogram Pattern among Gram-Negative Clinical Isolates. Int J Biomater 2023; 2023:6619268. [PMID: 38023107 PMCID: PMC10673669 DOI: 10.1155/2023/6619268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 08/26/2023] [Accepted: 11/02/2023] [Indexed: 12/01/2023] Open
Abstract
Background Bacterial biofilm is a significant virulence factor threatening patients, leading to chronic infections and economic burdens. Therefore, it is crucial to identify biofilm production, its inhibition, and reduction. In this study, we investigated biofilm production among Gram-negative isolates and assessed the inhibitory and reduction potential of ethylene diamine tetra acetic acid (EDTA) and dimethyl sulfoxide (DMSO) towards them. In addition, we studied the antimicrobial resistance pattern of the Gram-negative isolates. Methods Bacterial isolation and identification was done using standard microbiological techniques, following the Clinical and Laboratory Standards Institute (CLSI) guideline, 28th edition. The Kirby-Bauer disk diffusion method was used to determine the antibiotic susceptibility pattern of the isolates, and β-lactamase production was tested via the combination disk method. Biofilm formation was detected through the tissue culture plate (TCP) method. Different concentrations of EDTA and DMSO were used to determine their inhibitory and reduction properties against the biofilm. Both inhibition and reduction by the various concentrations of EDTA and DMSO were analyzed using paired t-tests. Results Among the 110 clinical isolates, 61.8% (68) were found to be multidrug resistant (MDR). 30% (33/110) of the isolates were extended-spectrum β-lactamase (ESBL) producers, 14.5% (16/110) were metallo-β-lactamase (MBL), and 8% (9/110) were Klebsiella pneumoniae carbapenemase (KPC) producers. Biofilm formation was detected in 35.4% of the isolates. Biofilm-producing organisms showed the highest resistance to antibiotics such as cephalosporins, chloramphenicol, gentamicin, and carbapenem. The inhibition and reduction of biofilm were significantly lower (p < 0.05) for 1 mM of EDTA and 2% of DMSO. Conclusion Isolates forming biofilm had a higher resistance rate and β-lactamase production compared to biofilm nonproducers. EDTA and DMSO were found to be potential antibiofilm agents. Hence, EDTA and DMSO might be an effective antibiofilm agent to control biofilm-associated infections.
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Affiliation(s)
- Ojaswee Shrestha
- Department of Laboratory Medicine, Manmohan Memorial Institute of Health Sciences, Kathmandu, Nepal
- Department of Pathology, Sumeru Hospital Pvt Ltd, Lalitpur, Nepal
| | - Nabina Shrestha
- Department of Laboratory Medicine, Manmohan Memorial Institute of Health Sciences, Kathmandu, Nepal
| | - Sadhana Khanal
- Department of Laboratory Medicine, Manmohan Memorial Institute of Health Sciences, Kathmandu, Nepal
| | - Sushant Pokhrel
- Department of Laboratory Medicine, Manmohan Memorial Institute of Health Sciences, Kathmandu, Nepal
| | - Sujina Maharjan
- Department of Laboratory Medicine, Manmohan Memorial Institute of Health Sciences, Kathmandu, Nepal
| | - Tika Bahadur Thapa
- Department of Laboratory Medicine, Manmohan Memorial Institute of Health Sciences, Kathmandu, Nepal
- Department of Pathology, Sumeru Hospital Pvt Ltd, Lalitpur, Nepal
| | - Puspa Raj Khanal
- Department of Pathology, Sumeru Hospital Pvt Ltd, Lalitpur, Nepal
| | - Govardhan Joshi
- Department of Laboratory Medicine, Manmohan Memorial Institute of Health Sciences, Kathmandu, Nepal
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Konaklieva MI, Plotkin BJ. Utilization of Existing Human Kinase Inhibitors as Scaffolds in the Development of New Antimicrobials. Antibiotics (Basel) 2023; 12:1418. [PMID: 37760715 PMCID: PMC10525673 DOI: 10.3390/antibiotics12091418] [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: 08/22/2023] [Revised: 09/03/2023] [Accepted: 09/04/2023] [Indexed: 09/29/2023] Open
Abstract
The prevalence and continuing expansion of drug resistance, both in clinical and community settings represents a major challenge for current antimicrobial therapy. The different approaches for addressing this challenge include (1) identification of novel antibacterials by repurposing of existing drugs originally that historically target host proteins; and (2) effect target switching through modification of existing antimicrobials. The focus of this manuscript is on these drug discovery strategies, with utility for development of new antimicrobials with different modes of action.
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Affiliation(s)
| | - Balbina J. Plotkin
- Department of Microbiology and Immunology, Midwestern University, Downers Grove, IL 60515, USA;
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Shen Y, Bai X, Wang J, Zhou X, Meng R, Guo N. Inhibitory Effect of Non-Saccharomyces Starmerella bacillaris CC-PT4 Isolated from Grape on MRSA Growth and Biofilm. Probiotics Antimicrob Proteins 2023:10.1007/s12602-023-10146-7. [PMID: 37639210 DOI: 10.1007/s12602-023-10146-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/15/2023] [Indexed: 08/29/2023]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a notorious pathogen with biofilm-forming and drug-resistant properties that make it difficult to eradicate. In this study, the inhibition of MRSA (ATCC 43300) by Starmerella bacillaris CC-PT4 (CGMCC No. 23573) was evaluated. The results showed that the inhibition of MRSA growth and biofilm was caused by S. bacillaris CC-PT4 cell-free supernatant (CFS). The CFS of S. bacillaris CC PT4 at different times can effectively inhibit the formation of MRSA biofilm, remove the preformed biofilm, and down-regulate the related genes that promote the formation of biofilm. Afterwards, untargeted metabolomics was performed to analyze the CFS of S. bacillaris CC-PT4. Several molecules with antibacterial and inhibitory biofilm effects from the CFS were found, one of which, 2-amino-1-phenylethanol (APE), has not been reported to have antiMRSA ability before. In this study, molecular docking analysis and in vitro experiments were used to verify the function of APE to inhibit MRSA. These results indicate that S. bacillaris CC-PT4 CFS can effectively inhibit MRSA which has potential application value in controlling MRSA.
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Affiliation(s)
- Yong Shen
- College of Food Science and Engineering, Jilin University, 130062, Changchun, People's Republic of China
| | - Xue Bai
- College of Food Science and Engineering, Jilin University, 130062, Changchun, People's Republic of China
| | - Jiaxi Wang
- College of Food Science and Engineering, Jilin University, 130062, Changchun, People's Republic of China
| | - Xiran Zhou
- College of Food Science and Engineering, Jilin University, 130062, Changchun, People's Republic of China
| | - Rizeng Meng
- Technology Center of Changchun Customs, 130062, Changchun, People's Republic of China
| | - Na Guo
- College of Food Science and Engineering, Jilin University, 130062, Changchun, People's Republic of China.
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Summer K, Browne J, Hollanders M, Benkendorff K. Out of control: The need for standardised solvent approaches and data reporting in antibiofilm assays incorporating dimethyl-sulfoxide (DMSO). Biofilm 2022; 4:100081. [PMID: 36060119 PMCID: PMC9428811 DOI: 10.1016/j.bioflm.2022.100081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 08/03/2022] [Accepted: 08/03/2022] [Indexed: 11/16/2022] Open
Affiliation(s)
- Kate Summer
- Faculty of Science and Engineering, Southern Cross University, Military Road, Lismore, NSW, 2480, Australia
- Faculty of Health, Southern Cross University, Terminal Drive, Bilinga, Qld, 4225, Australia
- Corresponding author. Faculty of Science and Engineering, Southern Cross University, Military Road, Lismore, NSW, 2480, Australia.
| | - Jessica Browne
- Faculty of Health, Southern Cross University, Terminal Drive, Bilinga, Qld, 4225, Australia
| | - Matthijs Hollanders
- Faculty of Science and Engineering, Southern Cross University, Military Road, Lismore, NSW, 2480, Australia
- QuantEcol, 53 Bentinck St, Ballina, NSW 2478, Australia
| | - Kirsten Benkendorff
- National Marine Science Centre, Southern Cross University, 2 Bay Drive, Coffs Harbour, NSW, 2450, Australia
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Effects of Alternative Solvents in Experimental Enamel Infiltrants on Bond Strength and Selected Properties. BIOMED RESEARCH INTERNATIONAL 2022; 2022:4293975. [DOI: 10.1155/2022/4293975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 09/26/2022] [Accepted: 10/11/2022] [Indexed: 11/16/2022]
Abstract
Objective. To evaluate different concentrations of solvents (tetrahydrofuran (THF) and dimethyl sulfoxide (DMSO) and monomers on the degree of conversion, microtensile bond strength, and mechanical properties of experimental resin infiltrants. Materials and Methods. Resin infiltrants were formulated and divided into eleven groups: (1) Icon, (2) 75% TEGDMA (T) +25% UDMA (U), (3) T +25% BIS-EMA (B), (4) T + U +0.5%DMSO, (5) T + U +5% DMSO, (6) T + U +0.5% THF, (7) T + U +5% THF, (8) T + B +0.5% DMSO, (9) T + B +5% DMSO, (10) T + B +0.5% THF, and (11) T + B +5% THF. One hundred and ten bovine mandibular incisors were sectioned, treated, and destined to the degree of conversion, tensile cohesive strength, microtensile bond strength, flexural strength, and elastic modulus. Data were submitted to one-way ANOVA and Tukey’s test (
). Results. The degree of conversion was lowest for T + B +5%THF (41.9%) and highest for T + U +5%THF (62.1%). In flexural strength and E-modulus, the T + B (96.5 MPa and 0.49 GPa) obtained the highest values and the lowest for T + U +5% DMSO (18.5 MPa and 9.7 GPa). Icon showed the highest bond strength (19.3 MPa) and cohesive strength (62.2 MPa), while T + U +5%DMSO (9.7 MPa) and T + B +5% DMSO (9.8 MPa) the lowest values and T + B +0.5% DMSO (12.3 MPa) the lowest cohesive strength. Conclusions. The addition of lower concentrations of DMSO or THF (0.5%) did not impair bond strength or significantly affect monomer conversion, but reduced the mechanical properties of resin infiltration.
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Sarker RR, Tsunoi Y, Haruyama Y, Sato S, Nishidate I. Depth distributions of bacteria for the Pseudomonas aeruginosa-infected burn wounds treated by methylene blue-mediated photodynamic therapy in rats: effects of additives to photosensitizer. JOURNAL OF BIOMEDICAL OPTICS 2022; 27:JBO-210330GR. [PMID: 35088588 PMCID: PMC8794038 DOI: 10.1117/1.jbo.27.1.018001] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 12/27/2021] [Indexed: 05/31/2023]
Abstract
SIGNIFICANCE Pseudomonas(P.) aeruginosa, a common cause of infection in burns, acquires antibiotic resistance easily and forms biofilms efficiently. Thus, it is difficult to control P. aeruginosa infection in burn wounds, which causes lethal septicemia. Antimicrobial photodynamic therapy (aPDT) is attractive as a new strategy to treat burn wound infections with drug-resistant bacteria. AIM We examined the efficacy of methylene blue (MB)-mediated aPDT with various additives in a tissue depth-resolved manner to find conditions that minimize the bacterial invasion. APPROACH We applied MB-mediated aPDT with LED array illumination to an extensive, full-thickness burn infected with P. aeruginosa in rats for three consecutive days (days 0, 1, and 2). On day 2, the depth distributions of bacteria were assessed based on the histological analysis using Gram staining. We examined how the addition of ethylenediaminetetraacetic acid (EDTA), ethanol, and dimethyl sulfoxide (DMSO) affected the efficacy of aPDT. RESULTS Pure MB-mediated aPDT significantly reduced the numbers of bacteria with biofilms on the wound surface and in the epidermis compared with those for the control tissue (saline only). However, there were many bacteria in the deeper region of the tissue. In contrast, MB/EDTA/ethanol/DMSO-mediated aPDT minimized the numbers of bacteria in the broad depth region of the tissue. Still, a limited number of bacteria was observed in the subcutaneous tissue. CONCLUSIONS The depthwise analysis of bacteria demonstrated the efficacy of the MB-mediated aPDT with the addition of EDTA, ethanol, and DMSO in controlling burn wound infections. However, further improvement of the therapy is needed to suppress bacterial migration into the deep tissue completely.
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Affiliation(s)
- Roma R. Sarker
- Tokyo University of Agriculture and Technology, Graduate School of Bio-Applications and Systems Engineering, Koganei, Japan
- Bangladesh Agricultural University, Department of Medicine, Faculty of Veterinary Science, Mymensingh, Bangladesh
| | - Yasuyuki Tsunoi
- National Defense Medical College Research Institute, Division of Bioinformation and Therapeutic Systems, Tokorozawa, Japan
| | - Yasue Haruyama
- National Defense Medical College Research Institute, Division of Bioinformation and Therapeutic Systems, Tokorozawa, Japan
| | - Shunichi Sato
- National Defense Medical College Research Institute, Division of Bioinformation and Therapeutic Systems, Tokorozawa, Japan
| | - Izumi Nishidate
- Tokyo University of Agriculture and Technology, Graduate School of Bio-Applications and Systems Engineering, Koganei, Japan
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Sahu SK, Zheng P, Yao N. Niclosamide Blocks Rice Leaf Blight by Inhibiting Biofilm Formation of Xanthomonas oryzae. FRONTIERS IN PLANT SCIENCE 2018; 9:408. [PMID: 29651297 PMCID: PMC5884940 DOI: 10.3389/fpls.2018.00408] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 03/14/2018] [Indexed: 05/05/2023]
Abstract
Rice (Oryza sativa) is the leading source of nutrition for more than half of the world's population, and by far it is the most important commercial food crop. But, its growth and production are significantly hampered by the bacterial pathogen Xanthomonas oryzae pv. oryzae (Xoo) which causes leaf blight disease. Earlier studies have reported the antibacterial ability of FDA-approved niclosamide drug against Xoo. However, the underlying mechanism by which niclosamide blocks the growth of Xoo remained elusive. In the present study, by employing the microbiological, microscopical, molecular, bioinformatics and analytical tools we found that niclosamide can directly inhibit the growth of the Xoo by hampering the biofilm formation and the production of xanthomonadin and exopolysaccharide substances (EPS) required for relentless growth and virulence of Xoo. Interestingly, niclosamide was found to specifically suppress the growth of Xoo without affecting other bacteria like Escherichia coli. Our electron microscopic observations disclosed that niclosamide disrupts the membrane permeability of Xoo and causes the release of intracellular components. Similarly, the molecular docking analysis disclosed the molecular interaction of niclosamide with the biofilm, virulence and quorum sensing related proteins, which was further substantiated by relative gene expression analysis where niclosamide was found to significantly downregulate the expression of these key regulatory genes. In addition, considerable changes in chemical structures were detected by Fourier Transform Infrared Spectroscopy (FTIR) in response to niclosamide treatment. Overall, our findings advocate the utilization of niclosamide as a safe and potent alternative antibacterial compound to control bacterial blight disease in rice.
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Affiliation(s)
| | | | - Nan Yao
- *Correspondence: Sunil Kumar Sahu, Nan Yao,
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