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Università della Svizzera italiana

A new constructive heuristic driven by machine learning for the traveling salesman problem

Mele, Umberto Junior ; Gambardella, Luca Maria ; Montemanni, Roberto

In: Algorithms, 2021, vol. 14, no. 9, p. 25

Recent systems applying Machine Learning (ML) to solve the Traveling Salesman Problem (TSP) exhibit issues when they try to scale up to real case scenarios with several hundred vertices. The use of Candidate Lists (CLs) has been brought up to cope with the issues. A CL is defined as a subset of all the edges linked to a given vertex such that it contains mainly edges that are believed to be...

Università della Svizzera italiana

Biological and clinical implications of BIRC3 mutations in chronic lymphocytic leukemia

Diop, Fary ; Moia, Riccardo ; Favini, Chiara ; Spaccarotella, Elisa ; De Paoli, Lorenzo ; Bruscaggin, Alessio ; Spina, Valeria ; Terzi-di-Bergamo, Lodovico ; Arruga, Francesca ; Tarantelli, Chiara ; Deambrogi, Clara ; Rasi, Silvia ; Adhinaveni, Ramesh ; Patriarca, Andrea ; Favini, Simone ; Sagiraju, Sruthi ; Jabangwe, Clive ; Kodipad, Ahad A. ; Peroni, Denise ; Mauro, Francesca R. ; Del Giudice, Ilaria ; Forconi, Francesco ; Cortelezzi, Agostino ; Zaja, Francesco ; Bomben, Riccardo ; Rossi, Francesca Maria ; Visco, Carlo ; Chiarenza, Annalisa ; Rigolin, Gian Matteo ; Marasca, Roberto ; Coscia, Marta ; Perbellini, Omar ; Tedeschi, Alessandra ; Laurenti, Luca ; Motta, Marina ; Donaldson, David ; Weir, Phil ; Mills, Ken ; Thornton, Patrick ; Lawless, Sarah ; Bertoni, Francesco ; Del Poeta, Giovanni ; Cuneo, Antonio ; Follenzi, Antonia ; Gattei, Valter ; Boldorini, Renzo Luciano ; Catherwood, Mark ; Deaglio, Silvia ; Foà, Robin ; Gaidano, Gianluca ; Rossi, Davide

In: Haematologica, 2020, vol. 105, no. 2, p. 448-456

BIRC3 is a recurrently mutated gene in chronic lymphocytic leukemia (CLL) but the functional implications of BIRC3 mutations are largely unexplored. Furthermore, little is known about the prognostic impact of BIRC3 mutations in CLL cohorts homogeneously treated with first-line fludarabine, cyclophosphamide, and rituximab (FCR). By immunoblotting analysis, we showed that the non-canonical...

Università della Svizzera italiana

TRPM7 kinase activity is essential for T cell colonization and alloreactivity in the gut

Romagnani, Andrea ; Vettore, Valentina ; Rezzonico-Jost, Tanja ; Hampe, Sarah ; Rottoli, Elsa ; Nadolni, Wiebke ; Perotti, Michela ; Meier, Melanie A. ; Hermanns, Constanze ; Geiger, Sheila ; Wennemuth, Gunther ; Recordati, Camilla ; Matsushita, Masayuki ; Muehlich, Susanne ; Proietti, Michele ; Chubanov, Vladimir ; Gudermann, Thomas ; Grassi, Fabio ; Zierler, Susanna

In: Nature communications, 2017, vol. 8, p. 1917

The melastatin-like transient-receptor-potential-7 protein (TRPM7), harbouring a cation channel and a serine/threonine kinase, has been implicated in thymopoiesis and cytokine expression. Here we show, by analysing TRPM7 kinase-dead mutant (Trpm7 R/R) mice, that the enzymatic activity of the receptor is not essential for thymopoiesis, but is required for CD103 transcription and gut-homing of ...

Università della Svizzera italiana

T follicular helper cells promote a beneficial gut ecosystem for host metabolic homeostasis by sensing microbiota-derived extracellular ATP

Perruzza, Lisa ; Gargari, Giorgio ; Proietti, Michele ; Fosso, Bruno ; D'Erchia, Anna Maria ; Faliti, Caterina Elisa ; Rezzonico-Jost, Tanja ; Scribano, Daniela ; Mauri, Laura ; Colombo, Diego ; Pellegrini, Giovanni ; Moregola, Annalisa ; Mooser, Catherine ; Pesole, Graziano ; Nicoletti, Mauro ; Norata, Giuseppe Danilo ; Geuking, Markus B. ; McCoy, Kathy D. ; Guglielmetti, Simone ; Grassi, Fabio

In: Cell reports, 2017, vol. 18, no. 11, p. 2566-2575

The ATP-gated ionotropic P2X7 receptor regulates T follicular helper (Tfh) cell abundance in the Peyer’s patches (PPs) of the small intestine; deletion of P2rx7, encoding for P2X7, in Tfh cells results in enhanced IgA secretion and binding to commensal bacteria. Here, we show that Tfh cell activity is important for generating a diverse bacterial community in the gut and that sensing of...

Università della Svizzera italiana

Enrichment of intestinal Lactobacillus by enhanced secretory IgA coating alters glucose homeostasis in P2rx7-/- mice

Perruzza, Lisa ; Strati, Francesco ; Gargari, Giorgio ; D’Erchia, Anna Maria ; Fosso, Bruno ; Pesole, Graziano ; Guglielmetti, Simone ; Grassi, Fabio

In: Scientific reports, 2019, vol. 9, p. 9315

The secretory immunoglobulin A (SIgA) in mammalian gut protects the organism from infections and contributes to host physiology by shaping microbiota composition. The mechanisms regulating the adaptive SIgA response towards gut microbes are poorly defined. Deletion of P2rx7, encoding for the ATP-gated ionotropic P2X7 receptor, leads to T follicular helper (Tfh) cells expansion in the Peyer’s...

Università della Svizzera italiana

Identification of a novel non-desmoglein autoantigen in Pemphigus Vulgaris

Di Lullo, Giulia ; Calabresi, Valentina ; Mariotti, Feliciana ; Zambruno, Giovanna ; Lanzavecchia, Antonio ; Di Zenzo, Giovanni

In: Frontiers in immunology, 2019, vol. 10, p. 1391

Pemphigus vulgaris (PV) is an autoimmune bullous disease of the skin and mucous membranes characterized by the presence of circulating and tissue-bound autoantibodies against keratinocyte cell surface antigens, specifically desmoglein (Dsg) 1 and 3. The pathogenic role of anti-Dsg antibodies is well-established, while the mechanism of blister formation is only partly defined. We have applied...

Università della Svizzera italiana

Dependence of immunoglobulin class switch recombination in B Cells on vesicular release of ATP and CD73 ectonucleotidase activity

Schena, Francesca ; Volpi, Stefano ; Faliti, Caterina Elisa ; Penco, Federica ; Santi, Spartaco ; Proietti, Michele ; Schenk, Ursula ; Damonte, Gianluca ; Salis, Annalisa ; Bellotti, Marta ; Fais, Franco ; Tenca, Claudya ; Gattorno, Marco ; Eibel, Hermann ; Rizzi, Marta ; Warnatz, Klaus ; Idzko, Marco ; Ayata, Cemil Korcan ; Rakhmanov, Mirzokhid ; Galli, Thierry ; Martini, Alberto ; Canossa, Marco ; Grassi, Fabio ; Traggiai, Elisabetta

In: Cell report, 2013, vol. 3, no. 6, p. 1824-1831

Immunoglobulin (Ig) isotype diversification by class switch recombination (CSR) is an essential process for mounting a protective humoral immune response. Ig CSR deficiencies in humans can result from an intrinsic B cell defect; however, most of these deficiencies are still molecularly undefined and diagnosed as common variable immunodeficiency (CVID). Here, we show that extracellular...