33 research outputs found
Systemic AA amyloidosis caused by inflammatory hepatocellular adenoma
To the Editor: Amyloid A (AA) systemic amyloidosis is a complication of chronic inflammatory diseases that is caused by the deposition of insoluble aggregates of cleaved N-terminal fragments of serum amyloid A (SAA) protein in tissues and organs throughout the body. Under physiologic conditions, SAA protein is produced by hepatocytes during the acute inflammatory phase in response to various cytokines such as interleukin-6. SAA is also overexpressed by neoplastic hepatocytes in inflammatory hepatocellular adenomas, a specific molecular subtype of benign liver tumors
Life-threatening influenza pneumonitis in a child with inherited IRF9 deficiency
Life-threatening pulmonary influenza can be caused by inborn errors of type I and III IFN immunity. We report a 5-yr-old child with severe pulmonary influenza at 2 yr. She is homozygous for a loss-of-function IRF9 allele. Her cells activate gamma-activated factor (GAF) STAT1 homodimers but not IFN-stimulated gene factor 3 (ISGF3) trimers (STAT1/STAT2/IRF9) in response to IFN-α2b. The transcriptome induced by IFN-α2b in the patient's cells is much narrower than that of control cells; however, induction of a subset of IFN-stimulated gene transcripts remains detectable. In vitro, the patient's cells do not control three respiratory viruses, influenza A virus (IAV), parainfluenza virus (PIV), and respiratory syncytial virus (RSV). These phenotypes are rescued by wild-type IRF9, whereas silencing IRF9 expression in control cells increases viral replication. However, the child has controlled various common viruses in vivo, including respiratory viruses other than IAV. Our findings show that human IRF9- and ISGF3-dependent type I and III IFN responsive pathways are essential for controlling IAV
Le Roman des Morand : usages et Ă©volutions dâune archive en ligne
International audienceAnne Verjus, Carole Boulai et Samantha SaĂŻdi prĂ©sentent la collaboration chercheure/ingĂ©nieures mise en place pour lâĂ©dition numĂ©rique "Le Roman des Morand" (http://morand.ens-lyon.fr). Il sâagit de la correspondance conjugale et familiale dâun couple lyonnais ayant vĂ©cu sous la RĂ©volution française et sous lâEmpire : Antoine et Magdeleine Morand de Jouffrey. Cette correspondance fait partie du fonds Morand (ensemble de manuscrits, de correspondances, de dossiers familiaux, dâestampes, ...) conservĂ© par les Archives Municipales de Lyon. Elle fait lâobjet dâune premiĂšre vague de numĂ©risation et dâune mise en ligne au printemps 2013. Les lettres sont transcrites dans un langage de balisage interopĂ©rable pour lâĂ©dition de corpus textuels : la TEI (Text Encoding Initiative, en XML). AprĂšs une sĂ©rie de transformations (xslt, xquery), les lettres sont ensuite Ă©ditĂ©es en ligne, grĂące au logiciel Omeka. En regard des transcriptions se trouvent les facs-similĂ©s photographiĂ©s selon un protocole de numĂ©risation prĂ©dĂ©fini. Lâensemble du corpus est enrichi de notices biographiques et historiques ainsi que dâune centaine de "tags". Il est interrogeable en plein-texte ou grĂące Ă des index de personnes (expĂ©diteurs, destinataires), localisations gĂ©ographiques, dates. Presque deux cents patronymes ont Ă©tĂ© identifiĂ©s, dont une vingtaine sont lâobjet dâune notice biographique. Cette collaboration chercheure/ingĂ©nieures est interrogĂ©e Ă la lumiĂšre des recherches scientifiques rendues possibles par la numĂ©risation du corpus : comment dĂ©velopper un langage passerelle entre histoire et informatique ? quel investissement technologique pour le chercheur ? Pour quel gain ? Quels nouveaux regards cela engage-t-il sur lâobjet de recherche, le matĂ©riau, les questionnements, etc.
Le Roman des Morand : usages et Ă©volutions dâune archive en ligne
International audienceAnne Verjus, Carole Boulai et Samantha SaĂŻdi prĂ©sentent la collaboration chercheure/ingĂ©nieures mise en place pour lâĂ©dition numĂ©rique "Le Roman des Morand" (http://morand.ens-lyon.fr). Il sâagit de la correspondance conjugale et familiale dâun couple lyonnais ayant vĂ©cu sous la RĂ©volution française et sous lâEmpire : Antoine et Magdeleine Morand de Jouffrey. Cette correspondance fait partie du fonds Morand (ensemble de manuscrits, de correspondances, de dossiers familiaux, dâestampes, ...) conservĂ© par les Archives Municipales de Lyon. Elle fait lâobjet dâune premiĂšre vague de numĂ©risation et dâune mise en ligne au printemps 2013. Les lettres sont transcrites dans un langage de balisage interopĂ©rable pour lâĂ©dition de corpus textuels : la TEI (Text Encoding Initiative, en XML). AprĂšs une sĂ©rie de transformations (xslt, xquery), les lettres sont ensuite Ă©ditĂ©es en ligne, grĂące au logiciel Omeka. En regard des transcriptions se trouvent les facs-similĂ©s photographiĂ©s selon un protocole de numĂ©risation prĂ©dĂ©fini. Lâensemble du corpus est enrichi de notices biographiques et historiques ainsi que dâune centaine de "tags". Il est interrogeable en plein-texte ou grĂące Ă des index de personnes (expĂ©diteurs, destinataires), localisations gĂ©ographiques, dates. Presque deux cents patronymes ont Ă©tĂ© identifiĂ©s, dont une vingtaine sont lâobjet dâune notice biographique. Cette collaboration chercheure/ingĂ©nieures est interrogĂ©e Ă la lumiĂšre des recherches scientifiques rendues possibles par la numĂ©risation du corpus : comment dĂ©velopper un langage passerelle entre histoire et informatique ? quel investissement technologique pour le chercheur ? Pour quel gain ? Quels nouveaux regards cela engage-t-il sur lâobjet de recherche, le matĂ©riau, les questionnements, etc.
Targeted next-generation sequencing identifies clinically relevant somatic mutations in a large cohort of inflammatory breast cancer
Abstract Background Inflammatory breast cancer (IBC) is the most aggressive form of primary breast cancer. Using a custom-made breast cancer gene sequencing panel, we investigated somatic mutations in IBC to better understand the genomic differences compared with non-IBC and to consider new targeted therapy in IBC patients. Methods Targeted next-generation sequencing (NGS) of 91 candidate breast cancer-associated genes was performed on 156 fresh-frozen breast tumor tissues from IBC patients. Mutational profiles from 197 primary breast tumors from The Cancer Genome Atlas (TCGA) were used as non-IBC controls for comparison analysis. The mutational landscape of IBC was correlated with clinicopathological data and outcomes. Results After genotype calling and algorithmic annotations, we identified 392 deleterious variants in IBC and 320 variants in non-IBC cohorts, respectively. IBC tumors harbored more mutations than non-IBC (2.5 per sample vs. 1.6 per sample, pâ<â0.0001). Eighteen mutated genes were significantly different between the two cohorts, namely TP53, CDH1, NOTCH2, MYH9, BRCA2, ERBB4, POLE, FGFR3, ROS1, NOTCH4, LAMA2, EGFR, BRCA1, TP53BP1, ESR1, THBS1, CASP8, and NOTCH1. In IBC, the most frequently mutated genes were TP53 (43.0%), PIK3CA (29.5%), MYH9 (8.3%), NOTCH2 (8.3%), BRCA2 (7.7%), ERBB4 (7.1%), FGFR3 (6.4%), POLE (6.4%), LAMA2 (5.8%), ARID1A (5.1%), NOTCH4 (5.1%), and ROS1 (5.1%). After grouping 91 genes on 10 signaling pathways, we found that the DNA repair pathway for the triple-negative breast cancer (TNBC) subgroup, the RTK/RAS/MAPK and cell cycle pathways for the HRâ/HER2+ subgroup, the DNA repair, RTK/RAS/MAPK, and NOTCH pathways for the HR+/HER2â subgroup, and the DNA repair, epigenome, and diverse pathways for the HR+/HER2+ subgroup were all significantly differently altered between IBC and non-IBC. PIK3CA mutation was independently associated with worse metastasis-free survival (MFS) in IBC since the median MFS for the PIK3CA mutant type was 26.0Â months and for the PIK3CA wild type was 101.1Â months (pâ=â0.002). This association was observed in TNBC (pâ=â0.04) and the HRâ/HER2+ subgroups (pâ=â0.0003), but not in the HR+/HER2â subgroup of IBC. Conclusions Breast cancer-specific targeted NGS uncovered a high frequency of deleterious somatic mutations in IBC, some of which may be relevant for clinical management
Projet « TREMOR ». Programme « Au fil de lâeau ».
Le projet TREMOR est un des projets de lâappel dâoffre AMI Au fil de lâeau lancĂ© par le Cresica. Il (2018-2020) a pour objectif de mieux comprendre lâorigine, les sources et les puits de la MOD identifiĂ©e dans les riviĂšres et dâĂ©valuer lâinfluence de la matiĂšre organique dissoute sur la dissĂ©mination et la toxicitĂ© des Ă©lĂšments traces mĂ©talliques au sein du littoral Ă lâaval des sites miniers.
Systemic AA Amyloidosis Caused by Inflammatory Hepatocellular Adenoma
International audienc