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Università della Svizzera italiana

Higher-order connections between stereotyped subsets : implications for improved patient classification in CLL

Agathangelidis, Andreas ; Chatzidimitriou, Anastasia ; Gemenetzi, Katerina ; Giudicelli, Veronique ; Karypidou, Maria ; Plevova, Karla ; Davis, Zadie ; Yan, Xiao-Jie ; Jeromin, Sabine ; Schneider, Christof ; Bredo-Pedersen, Lone ; Tschumper, Renee C. ; Sutton, Lesley-Ann ; Baliakas, Panagiotis ; Scarfò, Lydia ; van Gastel, Ellen J. ; Armand, Marine ; Tausch, Eugen ; Biderman, Bella ; Baer, Constance ; Bagnara, Davide ; Navarro, Alba ; Langlois de Septenville, Anne ; Guido, Valentina ; Mitterbauer-Hohendanner, Gerlinde ; Dimovski, Aleksandar ; Brieghel, Christian ; Lawless, Sarah ; Meggendorfer, Manja ; Braazdilova, Kamila ; Ritgen, Matthias ; Facco, Monica ; Tresoldi, Cristina ; Visentin, Andrea ; Patriarca, Andrea ; Catherwood, Mark ; Bonello, Lisa ; Sudarikov, Andrey ; Vanura, Katrina ; Roumelioti, Maria ; Skuhrova-Francova, Hana ; Moysiadis, Theodoros ; Veronese, Silvio ; Giannopoulos, Krzysztof ; Mansouri, Larry ; Karan-Djurasevic, Teodora ; Sandaltzopoulos, Raphael ; Bödör, Csaba ; Fais, Franco ; Kater, Arnon ; Panovska, Irina ; Rossi, Davide ; Alshemmari, Salem ; Panagiotidis, Panagiotis ; Costeas, Paul ; Espinet Solà, Blanca ; Antic, Darko ; Foroni, Letizia ; Montillo, Marco ; Trentin, Livio ; Stavroyianni, Niki ; Gaidano, Gianluca ; Francia di Celle, Paola ; Niemann, Carsten ; Campo, Elias ; Anagnostopoulos, Achilles ; Pott, Christiane ; Fischer, Kirsten ; Hallek, Michael ; Oscier, David ; Stilgenbauer, Stephan ; Haferlach, Claudia ; Jelinek, Diane ; Chiorazzi, Nicholas ; Pospisilova, Sarka ; Lefranc, Marie-Paule ; Kossida, Sofia ; Langerak, Anton W. ; Belessi, Chrysoula ; Davi, Frederic ; Rosenquist, Richard ; Ghia, Paolo ; Stamatopoulos, Kostas

In: Blood, 2020, vol. 137, no. 10, p. 1365–1376

Chronic lymphocytic leukemia (CLL) is characterized by the existence of subsets of patients with (quasi)identical, stereotyped B cell receptor immunoglobulins (BcR IG). Patients in certain major stereotyped subsets often display remarkably consistent clinicobiological profiles, suggesting that the study of BcR IG stereotypy in CLL has important implications for understanding disease...

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

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 ...

Università della Svizzera italiana

Structural basis for broad HIV-1 neutralization by the MPER-specific human broadly neutralizing antibody LN01

Pinto, Dora ; Fenwick, Craig ; Caillat, Christophe ; Silacci, Chiara ; Guseva, Serafima ; Dehez, François ; Chipot, Christophe ; Barbieri, Sonia ; Minola, Andrea ; Jarrossay, David ; Tomaras, Georgia D. ; Shen, Xiaoying ; Riva, Agostino ; Tarkowski, Maciej ; Schwartz, Olivier ; Bruel, Timothée ; Dufloo, Jérémy ; Seaman, Michael S. ; Montefiori, David C. ; Lanzavecchia, Antonio ; Corti, Davide ; Pantaleo, Giuseppe ; Weissenhorn, Winfried

In: Cell host & microbe, 2019, vol. 26, no. 5, p. p. 623-637.e8

Potent and broadly neutralizing antibodies (bnAbs) are the hallmark of HIV-1 protection by vaccination. The membrane-proximal external region (MPER) of the HIV-1 gp41 fusion protein is targeted by the most broadly reactive HIV-1 neutralizing antibodies. Here, we examine the structural and molecular mechansims of neutralization by anti-MPER bnAb, LN01, which was isolated from lymph-node-derived...

Université de Fribourg

mcr-9, An inducible gene encoding an acquired phosphoethanolamine transferase in Escherichia coli, and its origin

Kieffer, Nicolas ; Royer, b Guilhem ; Decousser, Jean-Winoc ; Bourrel, Anne-Sophie ; Palmieri, Mattia ; Ortiz De La Rosa, Jose-Manuel ; Jacquier, Hervé ; Denamur, Erick ; Nordmann, Patrice ; Poirel, Laurent

In: Antimicrobial Agents and Chemotherapy, 2019, vol. 63, no. 9, p. -

The plasmid-located mcr-9 gene, encoding a putative phosphoethanolamine transferase, was identified in a colistin-resistant human fecal Escherichia coli strain belonging to a very rare phylogroup, the D-ST69-O15:H6 clone. This MCR-9 protein shares 33% to 65% identity with the other plasmid-encoded MCR-type enzymes identified (MCR-1 to -8) that have been found as sources of acquired resistance...