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Bueno-Costa A, Piñeyro D, Soler M, Javierre BM, Raurell-Vila H, Subirana-Granés M, Pasquali L, Martinez-Climent JA, Esteller M

B-cell leukemia transdifferentiation to macrophage involves reconfiguration of DNA methylation for long-range regulation.

Leukemia 12 Nov 2019, . Epub 12 Nov 2019More information
Palomo M, Blasco M, Molina P, Lozano M, Praga M, Torramade-Moix S, Martinez-Sanchez J, Cid J, Escolar G, Carreras E, Paules C, Crispi F, Quintana LF, Poch E, Rodas L, Goma E, Morelle J, Espinosa M, Morales E, Avila A, Cabello V, Ariceta G, Chocron S, Manrique J, Barros X, Martin N, Huerta A, Fraga-Rodriguez GM, Cao M, Martin M, Romera AM, Moreso F, Manonelles A, Gratacos E, Pereira A, Campistol JM, Diaz-Ricart M

Complement Activation and Thrombotic Microangiopathies.

Clin J Am Soc Nephrol 6 Nov 2019, . Epub 6 Nov 2019
Atypical hemolytic uremic syndrome is a form of thrombotic microangiopathy caused by dysregulation of the alternative complement pathway. There is evidence showing complement activation in other thrombotic microangiopathies. The aim of this study was to evaluate complement activation in different thrombotic microangiopathies and to monitor treatment response.
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Ramos-Rodríguez M, Raurell-Vila H, Colli ML, Alvelos MI, Subirana-Granés M, Juan-Mateu J, Norris R, Turatsinze JV, Nakayasu ES, Webb-Robertson BM, Inshaw JRJ, Marchetti P, Piemonti L, Esteller M, Todd JA, Metz TO, Eizirik DL, Pasquali L

The impact of proinflammatory cytokines on the β-cell regulatory landscape provides insights into the genetics of type 1 diabetes.

Nat. Genet. 1 Nov 2019, . Epub 1 Nov 2019
The early stages of type 1 diabetes (T1D) are characterized by local autoimmune inflammation and progressive loss of insulin-producing pancreatic β cells. Here we show that exposure to proinflammatory cytokines reveals a marked plasticity of the β-cell regulatory landscape. We expand the repertoire of human islet regulatory elements by mapping stimulus-responsive enhancers linked to changes in the β-cell transcriptome, proteome and three-dimensional chromatin structure. Our data indicate that the β-cell response to cytokines is mediated by the induction of new regulatory regions as well as the activation of primed regulatory elements prebound by islet-specific transcription factors. We find that T1D-associated loci are enriched with newly mapped cis-regulatory regions and identify T1D-associated variants disrupting cytokine-responsive enhancer activity in human β cells. Our study illustrates how β cells respond to a proinflammatory environment and implicate a role for stimulus response islet enhancers in T1D.
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Martín-Antonio B, Suñe G, Najjar A, Perez-Amill L, Antoñana-Vildosola A, Castella M, León S, Velasco-de Andrés M, Lozano F, Lozano E, Bueno C, Estanyol JM, Muñoz-Pinedo C, Robinson SN

Extracellular NK histones promote immune cell anti-tumor activity by inducing cell clusters through binding to CD138 receptor.

J Immunother Cancer 16 Oct 2019, 7 (1) 259. Epub 16 Oct 2019
Natural killer (NK) cells are important anti-tumor cells of our innate immune system. Their anti-cancer activity is mediated through interaction of a wide array of activating and inhibitory receptors with their ligands on tumor cells. After activation, NK cells also secrete a variety of pro-inflammatory molecules that contribute to the final immune response by modulating other innate and adaptive immune cells. In this regard, external proteins from NK cell secretome and the mechanisms by which they mediate these responses are poorly defined.
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Palomo L, Ibáñez M, Abáigar M, Vázquez I, Álvarez S, Cabezón M, Tazón-Vega B, Rapado I, Fuster-Tormo F, Cervera J, Benito R, Larrayoz MJ, Cigudosa JC, Zamora L, Valcárcel D, Cedena MT, Acha P, Hernández-Sánchez JM, Fernández-Mercado M, Sanz G, Hernández-Rivas JM, Calasanz MJ, Solé F, Such E

Spanish Guidelines for the use of targeted deep sequencing in myelodysplastic syndromes and chronic myelomonocytic leukaemia.

Br. J. Haematol. 16 Oct 2019, . Epub 16 Oct 2019
The landscape of medical sequencing has rapidly changed with the evolution of next generation sequencing (NGS). These technologies have contributed to the molecular characterization of the myelodysplastic syndromes (MDS) and chronic myelomonocytic leukaemia (CMML), through the identification of recurrent gene mutations, which are present in >80% of patients. These mutations contribute to a better classification and risk stratification of the patients. Currently, clinical laboratories include NGS genomic analyses in their routine clinical practice, in an effort to personalize the diagnosis, prognosis and treatment of MDS and CMML. NGS technologies have reduced the cost of large-scale sequencing, but there are additional challenges involving the clinical validation of these technologies, as continuous advances are constantly being made. In this context, it is of major importance to standardize the generation, analysis, clinical interpretation and reporting of NGS data. To that end, the Spanish MDS Group (GESMD) has expanded the present set of guidelines, aiming to establish common quality standards for the adequate implementation of NGS and clinical interpretation of the results, hoping that this effort will ultimately contribute to the benefit of patients with myeloid malignancies.
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