Osmotic stress and vesiculation as key mechanisms controlling bacterial sensitivity and resistance to TiO2 nanoparticles

Autor: Christophe Pagnout, Angelina Razafitianamaharavo, Bénédicte Sohm, Céline Caillet, Audrey Beaussart, Eva Delatour, Isabelle Bihannic, Marc Offroy, Jérôme F. L. Duval

Publikováno v: Communications Biology, Vol 4, Iss 1, Pp 1-15 (2021)

Pagnout et al investigate the multiscale response of deep rough Escherichia coli mutants to TiO2 nanoparticle exposure and find that TiO2 strips the cell membrane, which triggers osmotic and then oxidative stresses. Depending on their lipopolysacchar

Externí odkaz: https://doaj.org/article/e14d58e79dab4489b8652cdbe62e1b45

Exploiting Catabolite Repression and Stringent Response to Control Delay and Multimodality of Bioluminescence Signal by Metal Whole-Cell Biosensors: Interplay between Metal Bioavailability and Nutritional Medium Conditions

Autor: Eva Delatour, Christophe Pagnout, Marie Zaffino, Jérôme F. L. Duval

Publikováno v: Biosensors, Vol 12, Iss 5, p 327 (2022)

The time-dependent response of metal-detecting whole-cell luminescent bacterial sensors is impacted by metal speciation/bioavailability in solution. The comprehensive understanding of such connections requires the consideration of the bacterial energ

Externí odkaz: https://doaj.org/article/c1e22ae93d2149e6b49d3c7eb4167997

New insights into the effects of growth phase and enzymatic treatment on the cell-wall properties of Chlorella vulgaris microalgae

Autor: Jérôme F.L. Duval, Angelina Razafitianamaharavo, Isabelle Bihannic, Marc Offroy, Nicolas Lesniewska, Bénédicte Sohm, Hélène Le Cordier, Christian Mustin, Christophe Pagnout, Audrey Beaussart

Publikováno v: Algal Research. 69:102955

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2967ae71eb53b3bd212f905b9d3707c1
https://doi.org/10.1016/j.algal.2022.102955

Decoding the Time-Dependent Response of Bioluminescent Metal-Detecting Whole-Cell Bacterial Sensors

Autor: Jérôme F. L. Duval, Christophe Pagnout

Publikováno v: ACS Sensors
ACS Sensors, American Chemical Society, 2020, 309, pp.article 127751. ⟨10.1021/acssensors.9b00349⟩

International audience; The signal produced by aqueous dispersions of bioluminescent, metal-responsive whole-cell bacterial sensors is indicative of the concentration of bioavailable metal ions in solution. The conventional calibration-based strategy

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35194728a141a2f4c8142747c4b4f782
https://hal.univ-lorraine.fr/hal-02095865/document

Pleiotropic effects of rfa-gene mutations on Escherichia coli envelope properties

Autor: Jérôme F. L. Duval, Pascale Bauda, Marc Offroy, Audrey Beaussart, Céline Caillet, Stéphane Jomini, Marjorie Leduc, Christophe Pagnout, Héloïse Gendre, Angelina Razafitianamaharavo, Bénédicte Sohm

Publikováno v: Scientific Reports
Scientific Reports, Nature Publishing Group, 2019, 9 (1), ⟨10.1038/s41598-019-46100-3⟩
Scientific Reports, Vol 9, Iss 1, Pp 1-16 (2019)
Scientific Reports, 2019, 9 (1), ⟨10.1038/s41598-019-46100-3⟩

International audience; Mutations in the rfa operon leading to severely truncated lipopolysaccharide (LPS) structures are associated with pleiotropic effects on bacterial cells, which in turn generates a complex phenotype termed deep-rough. Literatur

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a09087782e8b8ffc8dcd5071b632b5e4
https://doi.org/10.1038/s41598-019-46100-3