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Model-based drug development in pulmonary delivery: pharmacokinetic analysis of novel drug candidates for treatment of Pseudomonas aeruginosa lung infection (2018)
Journal Article
Sou, T., Kukavica-Ibrulj, I., Soukarieh, F., Halliday, N., Levesque, R. C., Williams, P., …Bergström, C. A. (2019). Model-based drug development in pulmonary delivery: pharmacokinetic analysis of novel drug candidates for treatment of Pseudomonas aeruginosa lung infection. Journal of Pharmaceutical Sciences, 108(1), 630-640. https://doi.org/10.1016/j.xphs.2018.09.017

Antibiotic resistance is a major public health threat worldwide. In particular, about 80% of cystic fibrosis patients have chronic Pseudomonas aeruginosa (PA) lung infection resistant to many current antibiotics. We are therefore developing a novel c... Read More about Model-based drug development in pulmonary delivery: pharmacokinetic analysis of novel drug candidates for treatment of Pseudomonas aeruginosa lung infection.

Quorum sensing in Pseudomonas savastanoi pv. savastanoi and Erwinia toletana: role in virulence and interspecies interactions in the olive knot (2018)
Journal Article
Caballo-Ponce, E., Meng, X., Uzelac, G., Halliday, N., Cámara, M., Licastro, D., …Venturi, V. (2018). Quorum sensing in Pseudomonas savastanoi pv. savastanoi and Erwinia toletana: role in virulence and interspecies interactions in the olive knot. Applied and Environmental Microbiology, 84(18), 1-18. https://doi.org/10.1128/AEM.00950-18

The olive-knot disease (Olea europea L.) is caused by the bacterium Pseudomonas savastanoi pv. savastanoi (PSV). PSV in the olive-knot undergoes interspecies interactions with the harmless endophyte Erwina toletana (ET); PSV and ET co-localize and fo... Read More about Quorum sensing in Pseudomonas savastanoi pv. savastanoi and Erwinia toletana: role in virulence and interspecies interactions in the olive knot.

Pseudomonas aeruginosa quorum sensing systems as drug discovery targets: current position and future perspectives (2018)
Journal Article
Soukarieh, F., Williams, P., Stocks, M. J., & Camara, M. (in press). Pseudomonas aeruginosa quorum sensing systems as drug discovery targets: current position and future perspectives. Journal of Medicinal Chemistry, https://doi.org/10.1021/acs.jmedchem.8b00540

Antimicrobial resistance (AMR) is a serious threat to public health globally, manifested by the frequent emergence of multi-drug resistant pathogens that render current chemotherapy inadequate. Health organizations worldwide have recognized the sever... Read More about Pseudomonas aeruginosa quorum sensing systems as drug discovery targets: current position and future perspectives.

Functional identification of the prnABCD operon and its regulation in Serratia plymuthica (2018)
Journal Article
Liu, X., Yu, X., Yang, Y., Heeb, S., Gao, S., Chan, K. G., …Gao, K. (in press). Functional identification of the prnABCD operon and its regulation in Serratia plymuthica. Applied Microbiology and Biotechnology, https://doi.org/10.1007/s00253-018-8857-0

The antibiotic pyrrolnitrin (PRN) is a tryptophan-derived secondary metabolite that plays an important role in the biocontrol of plant diseases due to its broad-spectrum of antimicrobial activities. The PRN biosynthetic gene cluster remains to be cha... Read More about Functional identification of the prnABCD operon and its regulation in Serratia plymuthica.

In Silico and in Vitro-Guided Identification of Inhibitors of Alkylquinolone-Dependent Quorum Sensing in Pseudomonas aeruginosa (2018)
Journal Article
Soukarieh, F., Vico Oton, E., Dubern, J.-F., Gomes, J., Halliday, N., de Pilar Crespo, M., …Cámara, M. (2018). In Silico and in Vitro-Guided Identification of Inhibitors of Alkylquinolone-Dependent Quorum Sensing in Pseudomonas aeruginosa. Molecules, 23(2), 1-15. https://doi.org/10.3390/molecules23020257

Pseudomonas aeruginosa is a major opportunistic pathogen in cystic fibrosis, wound and nosocomial infections, posing a serious burden to public health, due to its antibiotic resistance. The P. aeruginosa Pseudomonas Quinolone System (pqs) quorum sens... Read More about In Silico and in Vitro-Guided Identification of Inhibitors of Alkylquinolone-Dependent Quorum Sensing in Pseudomonas aeruginosa.

Weight gain during acute treatment of an initial pulmonary exacerbation is associated with a longer interval to the next exacerbation in adults with cystic fibrosis (2017)
Journal Article
Barr, H. L., Cámara, M., Barrett, D., Williams, P., Forrester, D., Smyth, A., …Fogarty, A. W. (in press). Weight gain during acute treatment of an initial pulmonary exacerbation is associated with a longer interval to the next exacerbation in adults with cystic fibrosis. ERJ Open Research, 3(3), https://doi.org/10.1183/23120541.00057-2017

Negative regulation of violacein biosynthesis in Chromobacterium violaceum (2017)
Journal Article
Devescovi, G., Kojic, M., Covaceuszach, S., Cámara, M., Williams, P., Bertani, I., …Venturi, V. (in press). Negative regulation of violacein biosynthesis in Chromobacterium violaceum. Frontiers in Microbiology, 8, Article 349. https://doi.org/10.3389/fmicb.2017.00349

In Chromobacteium violaceum, the purple pigment violacein is under positive regulation by the N-acylhomoserine lactone CviI/R quorum sensing system and negative regulation by an uncharacterized putative repressor. In this study we report that the bio... Read More about Negative regulation of violacein biosynthesis in Chromobacterium violaceum.

The DSF family of quorum sensing signals: diversity, biosynthesis, and turnover (2016)
Journal Article
Zhou, L., Zhang, L.-H., Cámara, M., & He, Y.-W. (2017). The DSF family of quorum sensing signals: diversity, biosynthesis, and turnover. Trends in Microbiology, 25(4), https://doi.org/10.1016/j.tim.2016.11.013

The diffusible signaling factor (DSF)-based quorum sensing (QS) system has emerged as a widely conserved cell–cell communication mechanism in Gram-negative bacteria. Typically, signals from the DSF family are cis-2-unsaturated fatty acids which regul... Read More about The DSF family of quorum sensing signals: diversity, biosynthesis, and turnover.

Cystic Fibrosis isolates of Pseudomonas aeruginosa retain iron-regulated antimicrobial activity against Staphylococcus aureus through the action of multiple alkylquinolones (2016)
Journal Article
Nguyen, A. T., Jones, J. W., Cámara, M., Williams, P., Kane, M. A., & Oglesby-Sherrouse, A. G. (2016). Cystic Fibrosis isolates of Pseudomonas aeruginosa retain iron-regulated antimicrobial activity against Staphylococcus aureus through the action of multiple alkylquinolones. Frontiers in Microbiology, 7, https://doi.org/10.3389/fmicb.2016.01171

Cystic fibrosis (CF) is a hereditary disease that predisposes individuals to pulmonary dysfunction and chronic infections. Early infection of the CF lung with Staphylococcus aureus is common, while Pseudomonas aeruginosa becomes dominant as disease p... Read More about Cystic Fibrosis isolates of Pseudomonas aeruginosa retain iron-regulated antimicrobial activity against Staphylococcus aureus through the action of multiple alkylquinolones.

Immune dysfunction in patients with obstructive jaundice before and after endoscopic retrograde cholangiopancreatography (2016)
Journal Article
Chowdhury, A. H., Camara, M., Martinez-Pomares, L., Zaitoun, A. M., Eremin, O., Aithal, G. P., & Lobo, D. (2016). Immune dysfunction in patients with obstructive jaundice before and after endoscopic retrograde cholangiopancreatography. Clinical Science, 130(17), 1535-1544. https://doi.org/10.1042/CS20160326

© 2016 The Author(s). This prospective observational study investigated monocyte cytokine responses to lipopolysaccharide (LPS) in patients with obstructive jaundice (OJ) before and after endoscopic biliary drainage. Dendritic cell (DC) subsets and t... Read More about Immune dysfunction in patients with obstructive jaundice before and after endoscopic retrograde cholangiopancreatography.

RpoS differentially affects the general stress response and biofilm formation in the endophytic Serratia plymuthica G3 (2015)
Journal Article

The ?S subunit RpoS of RNA polymerase functions as a master regulator of the general stress response in Escherichia coli and related bacteria. RpoS has been reported to modulate biocontrol properties in the rhizobacterium Serratia plymuthica IC1270.... Read More about RpoS differentially affects the general stress response and biofilm formation in the endophytic Serratia plymuthica G3.

Synthesis and cell-free cloning of DNA libraries using programmable microfluidics (2015)
Journal Article
Ben Yehezkel, T., Rival, A., Raz, O., Cohen, R., Marx, Z., Cámara, M., …Shapiro, E. (2016). Synthesis and cell-free cloning of DNA libraries using programmable microfluidics. Nucleic Acids Research, 44(4), e35. https://doi.org/10.1093/nar/gkv1087

Microfluidics may revolutionize our ability to write synthetic DNA by addressing several fundamental limitations associated with generating novel genetic constructs. Here we report the first de novo synthesis and cell-free cloning of custom DNA libra... Read More about Synthesis and cell-free cloning of DNA libraries using programmable microfluidics.

Clinical utilization of genomics data produced by the international Pseudomonas aeruginosa consortium (2015)
Journal Article
Freschi, L., Jeukens, J., Kukavica-Ibrulj, I., Boyle, B., Dupont, M.-J., Laroche, J., …Levesque, R. C. (in press). Clinical utilization of genomics data produced by the international Pseudomonas aeruginosa consortium. Frontiers in Microbiology, 6(1036), https://doi.org/10.3389/fmicb.2015.01036

The International Pseudomonas aeruginosa Consortium is sequencing over 1000 genomes and building an analysis pipeline for the study of Pseudomonas genome evolution, antibiotic resistance and virulence genes. Metadata, including genomic and phenotypic... Read More about Clinical utilization of genomics data produced by the international Pseudomonas aeruginosa consortium.

Biotic inactivation of the Pseudomonas aeruginosa quinolone signal molecule (2015)
Journal Article
Soh, E. Y.-C., Chhabra, S. R., Halliday, N., Heeb, S., Müller, C., Birmes, F. S., …Williams, P. (2015). Biotic inactivation of the Pseudomonas aeruginosa quinolone signal molecule. Environmental Microbiology, 17(11), https://doi.org/10.1111/1462-2920.12857

In Pseudomonas aeruginosa, quorum sensing (QS) regulates the production of secondary metabolites, many of which are antimicrobials that impact on polymicrobial community composition. Consequently, quenching QS modulates the environmental impact of P.... Read More about Biotic inactivation of the Pseudomonas aeruginosa quinolone signal molecule.

Granulocyte-macrophage colony stimulatory factor enhances the pro-inflammatory response of interferon-γ-treated macrophages to pseudomonas aeruginosa infection (2015)
Journal Article
Singh, S., Barr, H. L., Liu, Y.-C., Robins, A., Heeb, S., Williams, P., …Martinez-Pomares, L. (2015). Granulocyte-macrophage colony stimulatory factor enhances the pro-inflammatory response of interferon-γ-treated macrophages to pseudomonas aeruginosa infection. PLoS ONE, 10(2), Article e0117447. https://doi.org/10.1371/journal.pone.0117447

Pseudomonas aeruginosa is an opportunistic pathogen that can cause severe infections at compromised epithelial surfaces, such those found in burns, wounds, and in lungs damaged by mechanical ventilation or recurrent infections, particularly in cystic... Read More about Granulocyte-macrophage colony stimulatory factor enhances the pro-inflammatory response of interferon-γ-treated macrophages to pseudomonas aeruginosa infection.

Pseudomonas aeruginosa quorum sensing molecules correlate with clinical status in cystic fibrosis (2015)
Journal Article
Barr, H. L., Halliday, N., Cámara, M., Barrett, D. A., Williams, P., Forrester, D. L., Simms, R., Smyth, A. R., Honeybourne, D., Whitehouse, J. L., Nash, E. F., Dewar, J., Clayton, A., Knox, A. J., & Fogarty, A. W. (2015). Pseudomonas aeruginosa quorum sensing molecules correlate with clinical status in cystic fibrosis. European Respiratory Journal, 46(4), 1046-1054. https://doi.org/10.1183/09031936.00225214

ABSTRACT Pseudomonas aeruginosa produces quorum sensing signal molecules that are potential biomarkers for infection.
A prospective study of 60 cystic fibrosis patients with chronic P. aeruginosa, who required intravenous antibiotics for pulmonary e... Read More about Pseudomonas aeruginosa quorum sensing molecules correlate with clinical status in cystic fibrosis.

Genome-wide evaluation of the interplay between Caenorhabditis elegans and Yersinia pseudotuberculosis during in vivo biofilm formation. (2014)
Journal Article

The formation of an incapacitating biofilm on Caenorhabditis elegans by Yersinia pseudotuberculosis represents a tractable model for investigating the genetic basis for host-pathogen interplay during the biofilm-mediated infection of a living surface... Read More about Genome-wide evaluation of the interplay between Caenorhabditis elegans and Yersinia pseudotuberculosis during in vivo biofilm formation..

Interference with the germination and growth of Ulva zoospores by quorum-sensing molecules from Ulva-associated epiphytic bacteria (2013)
Journal Article
Twigg, M. S., Tait, K., Williams, P., Atkinson, S., & Cámara, M. (2014). Interference with the germination and growth of Ulva zoospores by quorum-sensing molecules from Ulva-associated epiphytic bacteria. Environmental Microbiology, 16(2), 445-453. https://doi.org/10.1111/1462-2920.12203

Ulva zoospores preferentially settle on N‐acylhomoserine lactone (AHL) producing marine bacterial biofilms. To investigate whether AHL signal molecules also affect the success and rate of zoospore germination in addition to zoospore attraction, the e... Read More about Interference with the germination and growth of Ulva zoospores by quorum-sensing molecules from Ulva-associated epiphytic bacteria.