Name: Quantificazione della violaceina nel Chromobacterium violaceum e sua inibizione da parte di composti bioattivi (Video) | JoVE Journal
Uploaded: 2025-08-08T14:10:00.000+00:00
Duration: 7 min 13 s
Description: Scopri come quantificare la violaceina in Chromobacterium violaceum per studiare l'inibizione del quorum sensing da parte di composti bioattivi come farnesolo, linalolo e resveratrolo. Questo metodo supporta lo sviluppo di nuove strategie anti-virulenza contro batteri antibiotico-resistenti.

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<ol><li>Mukherjee, S., Bassler, B. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Bacterial+quorum+sensing+in+complex+and+dynamically+changing+environments%5BTitle%5D)+AND+%22Nat+Rev+Microbiol%22%5BJournal%5D)">Bacterial quorum sensing in complex and dynamically changing environments.</a> Nat Rev Microbiol. 17 (6), 371(2019).</li>
<li>Lima, E. M. F., Winans, S. C., Pinto, U. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Quorum+sensing+interference+by+phenolic+compounds+-+A+matter+of+bacterial+misunderstanding%5BTitle%5D)+AND+%22Heliyon%22%5BJournal%5D)">Quorum sensing interference by phenolic compounds - A matter of bacterial misunderstanding.</a> Heliyon. 9 (7), (2023).</li>
<li>Papenfort, K., Bassler, B. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Quorum+sensing+signal-response+systems+in+Gram-negative+bacteria%5BTitle%5D)+AND+%22Nat+Rev+Microbiol%22%5BJournal%5D)">Quorum sensing signal-response systems in Gram-negative bacteria.</a> Nat Rev Microbiol. 14 (9), 576-588 (2016).</li>
<li>Grandclément, C., Tannières, M., Moréra, S., Dessaux, Y., Faure, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Quorum+quenching%3A+role+in+nature+and+applied+developments%5BTitle%5D)+AND+%22FEMS+Microbiol+Rev%22%5BJournal%5D)">Quorum quenching: role in nature and applied developments.</a> FEMS Microbiol Rev. 40 (1), 86-116 (2016).</li>
<li>Lima, E. M. F., de Almeida, F. A., Sircili, M. P., Bueris, V., Pinto, U. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((N-acetylcysteine+%28NAC%29+attenuates+quorum+sensing+regulated+phenotypes+in+Pseudomonas+aeruginosa+PAO1%5BTitle%5D)+AND+%22Heliyon%22%5BJournal%5D)">N-acetylcysteine (NAC) attenuates quorum sensing regulated phenotypes in Pseudomonas aeruginosa PAO1.</a> Heliyon. 9 (3), (2023).</li>
<li>Allen, R. C., Popat, R., Diggle, S. P., Brown, S. P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Targeting+virulence%3A+can+we+make+evolution-proof+drugs%5BTitle%5D)+AND+%22Nat+Rev+Microbiol%22%5BJournal%5D)">Targeting virulence: can we make evolution-proof drugs.</a> Nat Rev Microbiol. 12 (4), 300-308 (2014).</li>
<li>Kalia, V. C., Patel, S. K. S., Kang, Y. C., Lee, J. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Quorum+sensing+inhibitors+as+antipathogens%3A+biotechnological+applications%5BTitle%5D)+AND+%22Biotechnol+Adv%22%5BJournal%5D)">Quorum sensing inhibitors as antipathogens: biotechnological applications.</a> Biotechnol Adv. 37 (1), 68-90 (2019).</li>
<li>Santos, C. A., Lima, E. M. F., Franco, B. D. G. deM., Pinto, U. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Exploring+phenolic+compounds+as+quorum+sensing+inhibitors+in+foodborne+bacteria%5BTitle%5D)+AND+%22Front+Microbiol%22%5BJournal%5D)">Exploring phenolic compounds as quorum sensing inhibitors in foodborne bacteria.</a> Front Microbiol. 12, 735931(2021).</li>
<li>Ahmed, S. A. K. S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Natural+quorum+sensing+inhibitors+effectively+downregulate+gene+expression+of+Pseudomonas+aeruginosa+virulence+factors%5BTitle%5D)+AND+%22Appl+Microbiol+Biotechnol%22%5BJournal%5D)">Natural quorum sensing inhibitors effectively downregulate gene expression of Pseudomonas aeruginosa virulence factors.</a> Appl Microbiol Biotechnol. 103 (8), 3521-3535 (2019).</li>
<li>Yang, Q., Defoirdt, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Weak+selection+for+resistance+to+quorum+sensing+inhibition+during+multiple+host+infection+cycles%5BTitle%5D)+AND+%22ISME+J%22%5BJournal%5D)">Weak selection for resistance to quorum sensing inhibition during multiple host infection cycles.</a> ISME J. 18 (1), 251(2024).</li>
<li>Defoirdt, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Specific+antivirulence+activity%2C+A+new+concept+for+reliable+screening+of+virulence+inhibitors%5BTitle%5D)+AND+%22Trends+Biotechnol%22%5BJournal%5D)">Specific antivirulence activity, A new concept for reliable screening of virulence inhibitors.</a> Trends Biotechnol. 34 (7), (2016).</li>
<li>Defoirdt, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Quorum-sensing+systems+as+targets+for+antivirulence+therapy%5BTitle%5D)+AND+%22Trends+Microbiol%22%5BJournal%5D)">Quorum-sensing systems as targets for antivirulence therapy.</a> Trends Microbiol. 26 (4), 313-328 (2018).</li>
<li>Mahendrarajan, V., Easwaran, N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Quorum+quenching+effects+of+linoleic+and+stearic+acids+on+outer+membrane+vesicle-mediated+virulence+in+Chromobacterium+violaceum%5BTitle%5D)+AND+%22Biofouling%22%5BJournal%5D)">Quorum quenching effects of linoleic and stearic acids on outer membrane vesicle-mediated virulence in Chromobacterium violaceum.</a> Biofouling. , 1-11 (2024).</li>
<li>Durán, N., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Advances+in+Chromobacterium+violaceum+and+properties+of+violacein-Its+main+secondary+metabolite%3A+A+review%5BTitle%5D)+AND+%22Biotechnol+Adv%22%5BJournal%5D)">Advances in Chromobacterium violaceum and properties of violacein-Its main secondary metabolite: A review.</a> Biotechnol Adv. 34 (5), 1030-1045 (2016).</li>
<li>Nazir, N., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Characterization+of+phenolic+compounds+in+two+novel+lines+of+Pisum+sativum+L.+along+with+their+in+vitro+antioxidant+potential%5BTitle%5D)+AND+%22Env+Sci+Pollut+Res+Int%22%5BJournal%5D)">Characterization of phenolic compounds in two novel lines of Pisum sativum L. along with their in vitro antioxidant potential.</a> Env Sci Pollut Res Int. 27 (7), 7639(2020).</li>
<li>Majdura, J., Jankiewicz, U., Gałązka, A., Orzechowski, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((The+role+of+quorum+sensing+molecules+in+bacterial-plant+interactions%5BTitle%5D)+AND+%22Metabolites%22%5BJournal%5D)">The role of quorum sensing molecules in bacterial-plant interactions.</a> Metabolites. 13 (1), (2023).</li>
<li>Çevikbaş, H., Ulusoy, S., Kaya Kinaytürk,, N, <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Exploring+rose+absolute+and+phenylethyl+alcohol+as+novel+quorum+sensing+inhibitors+in+Pseudomonas+aeruginosa+and+Chromobacterium+violaceum%5BTitle%5D)+AND+%22Sci+Rep%22%5BJournal%5D)">Exploring rose absolute and phenylethyl alcohol as novel quorum sensing inhibitors in Pseudomonas aeruginosa and Chromobacterium violaceum.</a> Sci Rep. 14 (1), 15666(2024).</li>
<li>Choi, S. Y., Lim, S., Yoon, K. H., Lee, J. I., Mitchell, R. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Biotechnological+activities+and+applications+of+bacterial+pigments+violacein+and+prodigiosin%5BTitle%5D)+AND+%22J+Biol+Eng%22%5BJournal%5D)">Biotechnological activities and applications of bacterial pigments violacein and prodigiosin.</a> J Biol Eng. 15 (1), (2021).</li>
<li>Moradi, F., Hadi, N., Bazargani, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Evaluation+of+quorum-sensing+inhibitory+effects+of+extracts+of+three+traditional+medicine+plants+with+known+antibacterial+properties%5BTitle%5D)+AND+%22New+Microb+New+Infect%22%5BJournal%5D)">Evaluation of quorum-sensing inhibitory effects of extracts of three traditional medicine plants with known antibacterial properties.</a> New Microb New Infect. 38 (100769), 100769(2020).</li>
<li>Wiegand, I., Hilpert, K., Hancock, R. E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Agar+and+broth+dilution+methods+to+determine+the+minimal+inhibitory+concentration+%28MIC%29+of+antimicrobial+substances%5BTitle%5D)+AND+%22Nat+Protoc%22%5BJournal%5D)">Agar and broth dilution methods to determine the minimal inhibitory concentration (MIC) of antimicrobial substances.</a> Nat Protoc. 3 (2), 163-175 (2008).</li>
<li>Scardino, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Cinnamaldehyde+effectively+disrupts+Desulfovibrio+vulgaris+biofilms%3A+potential+implication+to+mitigate+microbiologically+influenced+corrosion%5BTitle%5D)+AND+%22Appl+Env+Microbiol%22%5BJournal%5D)">Cinnamaldehyde effectively disrupts Desulfovibrio vulgaris biofilms: potential implication to mitigate microbiologically influenced corrosion.</a> Appl Env Microbiol. 91 (5), (2025).</li>
<li>Summer, K., Browne, J., Hollanders, M., Benkendorff, K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Out+of+control%3A+The+need+for+standardised+solvent+approaches+and+data+reporting+in+antibiofilm+assays+incorporating+dimethyl-sulfoxide+%28DMSO%29%5BTitle%5D)+AND+%22Biofilm%22%5BJournal%5D)">Out of control: The need for standardised solvent approaches and data reporting in antibiofilm assays incorporating dimethyl-sulfoxide (DMSO).</a> Biofilm. 4, 100081(2022).</li>
<li>Ravichandran, V., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Virtual+screening+and+biomolecular+interactions+of+CviR-based+quorum+sensing+inhibitors+against+Chromobacterium+violaceum%5BTitle%5D)+AND+%22Front+Cell+Infect+Microbiol%22%5BJournal%5D)">Virtual screening and biomolecular interactions of CviR-based quorum sensing inhibitors against Chromobacterium violaceum.</a> Front Cell Infect Microbiol. 8, (2018).</li>
<li>Lima, E. M. F., de Almeida, F. A., Pinto, U. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Exploring+the+antivirulence+potential+of+phenolic+compounds+to+inhibit+quorum+sensing+in+Pseudomonas+aeruginosa%5BTitle%5D)+AND+%22World+J+Microbiol+Biotechnol%22%5BJournal%5D)">Exploring the antivirulence potential of phenolic compounds to inhibit quorum sensing in Pseudomonas aeruginosa.</a> World J Microbiol Biotechnol. 41 (2), (2025).</li>
<li>Blosser, R. S., Gray, K. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Extraction+of+violacein+from+Chromobacterium+violaceum+provides+a+new+quantitative+bioassay+for+N-acyl+homoserine+lactone+autoinducers%5BTitle%5D)+AND+%22J+Microbiol+Methods%22%5BJournal%5D)">Extraction of violacein from Chromobacterium violaceum provides a new quantitative bioassay for N-acyl homoserine lactone autoinducers.</a> J Microbiol Methods. 40 (1), 47-55 (2000).</li>
<li>Zhu, H., He, C. C., Chu, Q. H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Inhibition+of+quorum+sensing+in+Chromobacterium+violaceum+by+pigments+extracted+from+Auricularia+auricular%5BTitle%5D)+AND+%22Lett+Appl+Microbiol%22%5BJournal%5D)">Inhibition of quorum sensing in Chromobacterium violaceum by pigments extracted from Auricularia auricular.</a> Lett Appl Microbiol. 52 (3), 269-274 (2011).</li>
<li>Durán, N., Antonio, R. V., Haun, M., Pilli, R. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Biosynthesis+of+a+trypanocide+by+Chromobacterium+violaceum%5BTitle%5D)+AND+%22World+J+Microbiol+Biotechnol%22%5BJournal%5D)">Biosynthesis of a trypanocide by Chromobacterium violaceum.</a> World J Microbiol Biotechnol. 10 (6), 686(1994).</li>
<li>Rettori, D., Production Durán, N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((extraction+and+purification+of+violacein%3A+an+antibiotic+pigment+produced+by+Chromobacterium+violaceum%5BTitle%5D)+AND+%22World+J+Microbiol+Biotechnol%22%5BJournal%5D)">extraction and purification of violacein: an antibiotic pigment produced by Chromobacterium violaceum.</a> World J Microbiol Biotechnol. 14 (5), 685(1998).</li>
<li>Cheng, K. -C., Hsiao, H. -C., Hou, Y. -C., Hsieh, C. -W., Hsu, H. -Y., Chen, H. -Y., Lin, S. -P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Improvement+in+violacein+production+by+utilizing+formic+acid+to+induce+quorum+sensing+in+Chromobacterium+violaceum%5BTitle%5D)+AND+%22Antiox%22%5BJournal%5D)">Improvement in violacein production by utilizing formic acid to induce quorum sensing in Chromobacterium violaceum.</a> Antiox. 11 (5), 849(2022).</li>
<li>Defoirdt, T., Brackman, G., Coenye, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Quorum+sensing+inhibitors%3A+how+strong+is+the+evidence%5BTitle%5D)+AND+%22Trends+Microbiol%22%5BJournal%5D)">Quorum sensing inhibitors: how strong is the evidence.</a> Trends Microbiol. 21 (12), 619-624 (2013).</li>
<li>Alyousef, A. A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Myrtus+communis+and+its+bioactive+phytoconstituent%2C+linalool%2C+interferes+with+Quorum+sensing+regulated+virulence+functions+and+biofilm+of+uropathogenic+bacteria%3A+In+vitro+and+in+silico+insights%5BTitle%5D)+AND+%22J+King+Saud+Univ+Sci%22%5BJournal%5D)">Myrtus communis and its bioactive phytoconstituent, linalool, interferes with Quorum sensing regulated virulence functions and biofilm of uropathogenic bacteria: In vitro and in silico insights.</a> J King Saud Univ Sci. 33 (7), 101588(2021).</li>
<li>Kanekar, S., Devasya, R. P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Growth-phase+specific+regulation+of+cviI%2FR+based+quorum+sensing+associated+virulence+factors+in+Chromobacterium+violaceum+by+linalool%2C+a+monoterpenoid%5BTitle%5D)+AND+%22World+J+Microbiol+Biotechnol%22%5BJournal%5D)">Growth-phase specific regulation of cviI/R based quorum sensing associated virulence factors in Chromobacterium violaceum by linalool, a monoterpenoid.</a> World J Microbiol Biotechnol. 38 (2), (2022).</li>
<li>Dias, J. P., Domingues, F. C., Ferreira, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Linalool+reduces+virulence+and+tolerance+to+adverse+conditions+of+listeria+monocytogenes%5BTitle%5D)+AND+%22Antibiotics%22%5BJournal%5D)">Linalool reduces virulence and tolerance to adverse conditions of listeria monocytogenes.</a> Antibiotics. 13 (6), 474(2024).</li>
<li>Rodrigues, C. F., Černáková, L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Farnesol+and+tyrosol%3A+Secondary+metabolites+with+a+crucial+quorum-sensing+role+in+Candida+biofilm+development%5BTitle%5D)+AND+%22Genes%22%5BJournal%5D)">Farnesol and tyrosol: Secondary metabolites with a crucial quorum-sensing role in Candida biofilm development.</a> Genes. 11 (4), (2020).</li>
<li>Hacioglu, M., Yilmaz, F. N., Yetke, H. I., Haciosmanoglu-Aldogan, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Synergistic+effects+of+quorum-sensing+molecules+and+antimicrobials+against+Candida+albicans+and+Pseudomonas+aeruginosa+biofilms%3A+in+vitro+and+in+vivo+studies%5BTitle%5D)+AND+%22J+Antimicrob+Chemother%22%5BJournal%5D)">Synergistic effects of quorum-sensing molecules and antimicrobials against Candida albicans and Pseudomonas aeruginosa biofilms: in vitro and in vivo studies.</a> J Antimicrob Chemother. 79 (11), 2828(2024).</li>
<li>Bhattacharyya, S., Agrawal, A., Knabe, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Sol-gel+silica+controlled+release+thin+films+for+the+inhibition+of+methicillin+resistant+Staphylococcus+aureus%5BTitle%5D)+AND+%22Biomater%22%5BJournal%5D)">Sol-gel silica controlled release thin films for the inhibition of methicillin resistant Staphylococcus aureus.</a> Biomater. 35, 509-517 (2014).</li>
<li>Qu, Y., Zou, Y., Wang, G., Zhang, Y., Yu, Q. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Disruption+of+communication%3A+Recent+advances+in+antibiofilm+materials+with+anti-quorum+sensing+properties%5BTitle%5D)+AND+%22ACS+Appl+Mater+Interfaces%22%5BJournal%5D)">Disruption of communication: Recent advances in antibiofilm materials with anti-quorum sensing properties.</a> ACS Appl Mater Interfaces. 16 (11), 13353-13383 (2024).</li>
<li>Li, B., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Effects+of+Rhapontigenin+as+a+Novel+Quorum-Sensing+Inhibitor+on+Exoenzymes+and+Biofilm+Formation+of+Pectobacterium+carotovorum+subsp.+carotovorum+and+Its+Application+in+Vegetables%5BTitle%5D)+AND+%22Molecules%22%5BJournal%5D)">Effects of Rhapontigenin as a Novel Quorum-Sensing Inhibitor on Exoenzymes and Biofilm Formation of Pectobacterium carotovorum subsp. carotovorum and Its Application in Vegetables.</a> Molecules. 27 (24), (2022).</li>
<li>Mattio, L. M., Catinella, G., Pinto, A., Dallavalle, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Natural+and+nature-inspired+stilbenoids+as+antiviral+agents%5BTitle%5D)+AND+%22Eur+J+Med+Chem%22%5BJournal%5D)">Natural and nature-inspired stilbenoids as antiviral agents.</a> Eur J Med Chem. 202 (112541), 112541(2020).</li>
<li>Duarte, A., Alves, A. C., Ferreira, S., Silva, F., Domingues, F. C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Resveratrol+inclusion+complexes%3A+Antibacterial+and+anti-biofilm+activity+against+Campylobacter+spp.+and+Arcobacter+butzleri%5BTitle%5D)+AND+%22Food+Res+Int%22%5BJournal%5D)">Resveratrol inclusion complexes: Antibacterial and anti-biofilm activity against Campylobacter spp. and Arcobacter butzleri.</a> Food Res Int. 77, 244-250 (2015).</li>
<li>Martinelli, D., Grossmann, G., Séquin, U., Brandl, H., Bachofen, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Effects+of+natural+and+chemically+synthesized+furanones+on+quorum+sensing+in+Chromobacterium+violaceum%5BTitle%5D)+AND+%22BMC+Microbiol%22%5BJournal%5D)">Effects of natural and chemically synthesized furanones on quorum sensing in Chromobacterium violaceum.</a> BMC Microbiol. 4 (1), (2004).</li>
<li>Tan, L. Y., Yin, W. F., Piper Chan, K. G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((nigrum%2C+Piper+betle+and+Gnetum+gnemon-natural+food+sources+with+anti-quorum+sensing+properties%5BTitle%5D)+AND+%22Sensors%22%5BJournal%5D)">nigrum, Piper betle and Gnetum gnemon-natural food sources with anti-quorum sensing properties.</a> Sensors. 13 (3), 3975-3985 (2013).</li>
<li>Tan, L. Y., Yin, W. F., Chan, K. G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Silencing+quorum+sensing+through+extracts+of+Melicope+lunu-ankenda%5BTitle%5D)+AND+%22Sensors%22%5BJournal%5D)">Silencing quorum sensing through extracts of Melicope lunu-ankenda.</a> Sensors. 12 (4), 4339-4351 (2012).</li>
<li>Oliveira, B. D., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/pubmed?term=((Antioxidant%2C+antimicrobial+and+anti-quorum+sensing+activities+of+Rubus+rosaefolius+phenolic+extract%5BTitle%5D)+AND+%22Ind+Crops+Prod%22%5BJournal%5D)">Antioxidant, antimicrobial and anti-quorum sensing activities of Rubus rosaefolius phenolic extract.</a> Ind Crops Prod. 84, 59-66 (2016).</li>
</ol>

<table><tbody><tr><td>DMSO&nbsp;</td><td>Synth</td><td></td><td></td></tr><tr><td>Farnesolo</td><td>Sigma-Aldrich</td><td>F203</td><td>95%</td></tr><tr><td>Linalolo</td><td>Sigma-Aldrich</td><td>L2602</td><td>97%</td></tr><tr><td>Luria-Bertani Medio</td><td>Difco</td><td>244620</td><td></td></tr><tr><td>Pellicola adesiva ottica</td><td>Thermo Fisher</td><td>4311971</td><td>MicroAmp</td></tr><tr><td>Resveratrolo</td><td>Sigma-Aldrich</td><td>R5010</td><td>&ge; 99% (HPLC)</td></tr><tr><td>Lettore multimodale Synergy HTX</td><td>Biotek</td><td></td><td></td></tr><tr><td>Piastre per coltura tissutale 96 pozzetti</td><td>Kasvi</td><td>K12-096</td><td></td></tr></tbody></table>

quantificazione della violaceina nel chromobacterium violaceum e sua inibizione da parte di composti bioattivi

Quantification of Violacein in Chromobacterium violaceum and Its Inhibition by Bioactive Compounds

Per i risultati qui mostrati, sono stati utilizzati tre composti bioattivi precedentemente studiati dal nostro gruppo di ricerca8, resveratrolo, farnesolo e linalolo. Ogni composto è stato testato per la sua capacità di inibire la produzione di violaceina in C. violaceum ATCC 12472, un fenotipo regolato dal sistema QS sull'operone23 di vioABCDE.
I risultati convalidano l'efficacia del nostro protocollo nel quantificare la produz...

Quantificazione della violaceina nel Chromobacterium violaceum e sua inibizione da parte di composti bioattivi

Bacteria communicate through a system known as quorum sensing (QS), which allows them to coordinate their behavior in response to changes in cell density. ...

quantification-violacein-chromobacterium-violaceum-its-inhibition

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Biologia

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Quantificazione della soppressione del biofilm indotta da enzimi nei batteri patogeni

Fonte: Bucher, T., et al. Metodologie per lo studio dei biofilm di B. subtilis come modello per caratterizzare inibitori di biofilm di piccole molecole. J. Vis. Esp. (2016)Questo video mostra un saggio di formazione di pellicole utilizzando Bacillus subtilis per valutare inibitori di piccole molecole che interrompono la sintesi della matrice e lo sviluppo di biofilm, fornendo un modello per selezionare composti che inibiscono selettivamente la crescita associata alla superficie senza...

Valutazione degli effetti inibitori sulla formazione delle pellicole in Bacillus subtilis

La maggior parte delle infezioni batteriche produce un biofilm. In virtù del loro ambiente, i batteri associati al biofilm sono spesso fenotipicamente resistenti ai farmaci. Le nuove molecole antibatteriche che uccidono i batteri nei biofilm sono quindi una priorità assoluta. Stabiliamo un test per lo screening rapido di composti antimicrobici efficaci nell'eradicazione dei biofilm.

Targeting biofilm Associated<em&gt; Staphylococcus aureus</em&gt; Uso resazurina base Assay farmaco-sensibilità

Descriviamo un metodo modificato a base di agar progettato per quantificare gli effetti antifungini dei prodotti di origine vegetale. Sia i contributi volatili che i contributi non volatili all'attività antimicotica possono essere valutati attraverso questo protocollo. Inoltre, l'efficacia contro i funghi può essere misurata in fasi chiave di sviluppo in un'unica configurazione sperimentale.

Misurazione dell'attività antifungina volatile e non volatile dei prodotti biocontrollo

Questo manoscritto descrive un metodo per utilizzare la microscopia a fluorescenza a singola cellula per visualizzare e quantificare la competizione batterica in cocoltura.

Quantificazione della competizione interbatterica utilizzando l'imaging a fluorescenza a singola cellula

Questo protocollo descrive la preparazione dell'inoculo, la quantificazione del biofilm su piastre per microtitolazione utilizzando un colorante crystal violet, la conta vitale nei biofilm e la visualizzazione dei biofilm di Acinetobacter.

Strategie di quantificazione, valutazione della vitalità e visualizzazione per biofilm di Acinetobacter

I composti tiofenesulfonammidici sono potenti e specifici inibitori dei regolatori del quorum sensing del vibrione LuxR/HapR che ne bloccano l'attività in vivo, impedendo così la trascrizione dei geni per la virulenza, la motilità e i biofilm. Questo protocollo descrive in dettaglio come questi composti vengono sintetizzati, modellati in silico e analizzati in vivo per l'attività contro LuxR/HapR.

Sintesi e dosaggio di inibitori del quorum sensing del vibrione

Questo protocollo descrive un metodo semplice ed economico per valutare l'efficacia di potenziali fotosensibilizzatori nell'inattivazione fotodinamica antibatterica (aPDI), utilizzando un formato di piastra a 96 pozzetti combinato con una sorgente luminosa a pannello LED. Questo approccio consente di testare simultaneamente più condizioni sperimentali, tra cui diverse concentrazioni, composti e ceppi batterici.

Screening in vitro basato su LED per la valutazione di molecole fotoattivabili nell'inattivazione fotodinamica batterica

Questo protocollo fornisce un quadro sistematico per valutare come i fitochimici possano potenziare gli effetti battericidi dei biocidi tradizionali utilizzando la modellazione dell'attività battericida e i saggi di interazione combinatoria, che mirano a identificare miscele sinergiche che migliorano il controllo microbico e riducano l'uso complessivo di biocidi.

In vitro Valutazione degli effetti potenzianti delle molecole di origine vegetale sui biocidi convenzionali

La resistenza agli antibiotici tra i ceppi di Escherichia coli invasivi in adesione pone difficoltà nella valutazione dell'invasione batterica utilizzando il tradizionale saggio protettivo per la gentamicina. Viene descritto un metodo migliorato per valutare quantitativamente l'invasione batterica enumerando le unità formative di colonie e qualitativamente tramite la visualizzazione delle cellule infette tramite microscopia confocale a immunofluorescenza.

Test di protezione amikacin per la quantificazione e visualizzazione dell'invasione delle cellule di Escherichia coli

Scopri come quantificare la violaceina in Chromobacterium violaceum per studiare l'inibizione del quorum sensing da parte di composti bioattivi come farnesolo, linalolo e resveratrolo. Questo metodo supporta lo sviluppo di nuove strategie anti-virulenza contro batteri antibiotico-resistenti.

Quantificazione della violaceina nel Chromobacterium violaceum e sua inibizione da parte di composti bioattivi

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