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Lagrangian Reductions and Integrable Systems in Condensed Matter

Gay-Balmaz, François ; Monastyrsky, Michael ; Ratiu, Tudor

In: Communications in Mathematical Physics, 2015, vol. 335, no. 2, p. 609-636

Université de Fribourg

Dimercaptosuccinic acid in combination with carbapenems against isogenic strains of Escherichia coli producing or not producing a metallo-β-lactamase in vitro and in murine peritonitis

Cheminet, G. ; de Lastours, V. ; Poirel, Laurent ; Chau, F. ; Peoc’h, K. ; Massias, L. ; Fantin, B. ; Nordmann, Patrice

In: Journal of Antimicrobial Chemotherapy, 2020, vol. 75, no. 12, p. 3593–3600

Background: Carbapenemase-producing Enterobacterales represent a major therapeutic challenge. MBLs, requiring zinc at their catalytic site, could be inhibited by meso-dimercaptosuccinic acid (DMSA), a heavy metal chelator already widely used for treating lead intoxication.Objectives: To evaluate the activity of carbapenems alone or combined with DMSA against MBL-producing Escherichia coli in...

Université de Fribourg

Misfit layer compounds: a platform for heavily doped 2D transition metal dichalcogenides

Leriche, Raphaël T. ; Palacio‐Morales, Alexandra ; Campetella, Marco ; Tresca, Cesare ; Sasaki, Shunsuke ; Brun, Christophe ; Debontridder, François ; David, Pascal ; Arfaoui, Imad ; Šofranko, Ondrej ; Samuely, Tomas ; Kremer, Geoffroy ; Monney, Claude ; Jaouen, Thomas ; Cario, Laurent ; Calandra, Matteo ; Cren, Tristan

In: Advanced Functional Materials, 2020, p. 2007706

Transition metal dichalcogenides (TMDs) display a rich variety of instabilities such as spin and charge orders, Ising superconductivity, and topological properties. Their physical properties can be controlled by doping in electric double‐layer field‐effect transistors (FET). However, for the case of single layer NbSe2, FET doping is limited to ≈1 × 1014 cm−2, while a somewhat larger...

Université de Fribourg

Phosphatidylserine transport by ORP/Osh proteins is driven by phosphatidylinositol 4-phosphate

Filseck, Joachim Moser von ; Čopič, Alenka ; Delfosse, Vanessa ; Vanni, Stefano ; Jackson, Catherine L. ; Bourguet, William ; Drin, Guillaume

In: Science, 2015, vol. 349, no. 6246, p. 432–436

In eukaryotic cells, phosphatidylserine (PS) is synthesized in the endoplasmic reticulum (ER) but is highly enriched in the plasma membrane (PM), where it contributes negative charge and to specific recruitment of signaling proteins. This distribution relies on transport mechanisms whose nature remains elusive. Here, we found that the PS transporter Osh6p extracted phosphatidylinositol...

Université de Fribourg

Methyl-branched lipids promote the membrane adsorption of α-synuclein by enhancing shallow lipid-packing defects

Garten, Matthias ; Prévost, Coline ; Cadart, Clotilde ; Gautier, Romain ; Bousset, Luc ; Melki, Ronald ; Bassereau, Patricia ; Vanni, Stefano

In: Physical Chemistry Chemical Physics, 2015, vol. 17, no. 24, p. 15589–15597

Alpha-synuclein (AS) is a synaptic protein that is directly involved in Parkinson's disease due to its tendency to form protein aggregates. Since AS aggregation can be dependent on the interactions between the protein and the cell plasma membrane, elucidating the membrane binding properties of AS is of crucial importance to establish the molecular basis of AS aggregation into toxic fibrils....

Université de Fribourg

Modularity of the neck in birds (Aves)

Terray, Léa ; Plateau, Olivia ; Abourachid, Anick ; Böhmer, Christine ; Delapré, Arnaud ; la Bernardie, Xavier de ; Cornette, Raphaël

In: Evolutionary Biology, 2020, p. -

The neck connects the head and the trunk and is the key structure allowing all movements of the head. The neck morphology of birds is the most variable among living tetrapods, including significant differences in the number and shape of the cervical vertebrae. Despite these differences, according to the literature, three morphofunctional regions (i.e., modules) have been identified along the...

Université de Fribourg

The inoculum effect of Escherichia coli expressing mcr-1 or not on colistin activity in a murine model of peritonitis

Fantin, B. ; Poujade, J. ; Grégoire, N. ; Chau, F. ; Roujansky, A. ; Kieffer, Nicolas ; Berleur, M. ; Couet, W. ; Nordmann, Patrice

In: Clinical Microbiology and Infection, 2019, vol. 25, no. 12, p. 1563.e5-1563.e8

Colistin often remains the last resort antibiotic active against carbapenemase- producing Enterobacteriaceae. However, while in vitro inoculum effect has been reported, therapeutic relevance of this phenomenon remains questioned.Methods: Ten E. coli strains were used that included the wild-type CFT073 and its transconjugant CFT073-MCR-1 and eight susceptible clinical isolates. Mice with ...