Time filter

Source Type

Barcelona, Spain

Martinez-Trillos A.,Institute dinvestigacions Biomediques August Pi i Sunyer IDIBAPS | Pinyol M.,Unitat de Genomica | Navarro A.,Unitat de Genomica | Aymerich M.,Institute dinvestigacions Biomediques August Pi i Sunyer IDIBAPS | And 21 more authors.
Blood | Year: 2014

Mutations in Toll-like receptor (TLR ) and myeloid differentiation primary response 88 ( MYD88 ) genes have been found in chronic lymphocytic leukemia (CLL) at low frequency. We analyzed the incidence, clinicobiological characteristics, and outcome of patients with TLR/MYD88 mutations in 587 CLL patients. Twenty-three patients (3.9%) hadmutations, 19 in MYD88 (one with concurrent IRAK1 mutation), 2 TLR2 (one with concomitant TLR6 mutation), 1 IRAK1 , and 1 TLR5. No mutations were found in IRAK2 and IRAK4. TLR/MYD88- mutated CLL overexpressed genes of the nuclear factor κB pathway. Patients with TLR/MYD88 mutations were significantly younger (83% age ≤50 years) than those with no mutations. TLR/MYD88 mutations were the most frequent in youngpatients. Patients with mutated TLR/MYD88 CLLhad a higher frequency of mutated IGHV and low expression of CD38 and ZAP-70. Overall survival (OS) was better in TLR/MYD88-mutated than unmutated patients in the whole series (10-year OS, 100% vs 62%; P = .002), and in the subset of patients age ≤50 years (100% vs 70%; P = .02). In addition, relative OS of TLR/MYD88-mutated patients was similar to that in the age- and gender-matched population. In summary, TLR/MYD88 mutations identify a population of young CLL patients with favorable outcome. © 2014 by The American Society of Hematology.

Villamor N.,Institute dinvestigacions Biomediques August Pi i Sunyer IDIBAPS | Conde L.,Institute dinvestigacions Biomediques August Pi i Sunyer IDIBAPS | Martinez-Trillos A.,Institute dinvestigacions Biomediques August Pi i Sunyer IDIBAPS | Cazorla M.,Institute dinvestigacions Biomediques August Pi i Sunyer IDIBAPS | And 27 more authors.
Leukemia | Year: 2013

NOTCH1 has been found recurrently mutated in a subset of patients with chronic lymphocytic leukemia (CLL). To analyze biological features and clinical impact of NOTCH1 mutations in CLL, we sequenced this gene in 565 patients. NOTCH1 mutations, found in 63 patients (11%), were associated with unmutated IGHV, high expression of CD38 and ZAP-70, trisomy 12, advanced stage and elevated lactate dehydrogenase. Sequential analysis in 200 patients demonstrated acquisition of mutation in one case (0.5%) and disappearance after treatment in two. Binet A and B patients with NOTCH1-mutated had a shorter time to treatment. NOTCH1-mutated patients were more frequently refractory to therapy and showed shorter progression-free and overall survival after complete remission. Overall survival was shorter in NOTCH1-mutated patients, although not independently from IGHV. NOTCH1 mutation increased the risk of transformation to diffuse large B-cell lymphoma independently from IGHV, with this being validated in resampling tests of replicability. In summary, NOTCH1 mutational status, that was rarely acquired during the course of the disease, identify a genetic subgroup with high risk of transformation and poor outcome. This recently identified genetic subgroup of CLL patients deserves prospective studies to define their best management. © 2013 Macmillan Publishers Limited All rights reserved.

Bacardit J.,University of Barcelona | Sans C.,University of Barcelona | Seminago R.,Unitat de Genomica | Esplugas S.,University of Barcelona
Industrial and Engineering Chemistry Research | Year: 2010

In a previous work, a hybrid system consisting of an advanced oxidation process (AOP) named Photo-Fenton (Ph-F) and a fixed bed biological treatment operating as a sequencing batch biofilm reactor (SBBR) was started-up and optimized to treat 200 mg·L-1 of 4-chlorophenol (4-CP) as a model compound. In this work, studies of reactor stability and control as well as microbial population determination by molecular biology techniques were carried out to further characterize and control the biological reactor. Results revealed that the integrated system was flexible and even able to overcome toxic shock loads. Oxygen uptake rate (OUR) in situ was shown to be a valid tool to control the SBBR operation, to detect toxic conditions to the biomass, and to assess the recovery of performance. A microbial characterization by 16S rDNA sequence analysis reveals that the biological population was varied, although about 30% of the bacteria belonged to the Wautersia genus. © 2010 American Chemical Society.

Discover hidden collaborations