42 research outputs found

    COVID-19 symptoms at hospital admission vary with age and sex: results from the ISARIC prospective multinational observational study

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    Background: The ISARIC prospective multinational observational study is the largest cohort of hospitalized patients with COVID-19. We present relationships of age, sex, and nationality to presenting symptoms. Methods: International, prospective observational study of 60 109 hospitalized symptomatic patients with laboratory-confirmed COVID-19 recruited from 43 countries between 30 January and 3 August 2020. Logistic regression was performed to evaluate relationships of age and sex to published COVID-19 case definitions and the most commonly reported symptoms. Results: ‘Typical’ symptoms of fever (69%), cough (68%) and shortness of breath (66%) were the most commonly reported. 92% of patients experienced at least one of these. Prevalence of typical symptoms was greatest in 30- to 60-year-olds (respectively 80, 79, 69%; at least one 95%). They were reported less frequently in children (≀ 18 years: 69, 48, 23; 85%), older adults (≄ 70 years: 61, 62, 65; 90%), and women (66, 66, 64; 90%; vs. men 71, 70, 67; 93%, each P < 0.001). The most common atypical presentations under 60 years of age were nausea and vomiting and abdominal pain, and over 60 years was confusion. Regression models showed significant differences in symptoms with sex, age and country. Interpretation: This international collaboration has allowed us to report reliable symptom data from the largest cohort of patients admitted to hospital with COVID-19. Adults over 60 and children admitted to hospital with COVID-19 are less likely to present with typical symptoms. Nausea and vomiting are common atypical presentations under 30 years. Confusion is a frequent atypical presentation of COVID-19 in adults over 60 years. Women are less likely to experience typical symptoms than men

    Apport du séquençage haut débit de gÚnes ciblés dans la leucémie à tricholeucocytes : mise en évidence d'un nouveau gÚne altéré, KDM6A, dans la forme variante de la maladie

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    Introduction: BRAFV600E detected in more than 80% of Hairy cell leukemia cases. Recently new additional mutation to BRAFV600E have been described. Methods: We selected a panel of 21 relevant genes (defined as Trichopanel) based on literature review of whole exome sequencing studies. At diagnosis, we analyzed 20 HCL and 4 variant form (HCL-v) samples and at relapse 2 HCL and 3 HCL-v.The ratio of variant allele frequency (rVAF) was pondered according to the % of tumor cells estimated by Flow Cytometry. Results and discussion: The Trichopanel was informative for 96% (23/24) of patients and revealed single nucleotide variants (SNVs) in BRAF (n=18), KLF2 (n=4), MAP2K1 (n=3), KDM6A (n=2), CDKN1B (n=2), ARID1A (n=2), CREBBP (n=2) NOTCH1 (n=1) and ARID1B (n=1). BRAFV600E was found in 90% (18/20) of HCL patients and no case in HCL-v patients. In HCL BRAFV600E patients, other mutations were found in 33% (6/18) of cases with a rVAF close to BRAFV600E rVAF. Those data indicating that they are early-onset mutations. All 4 HCL-v patients had SNVs in epigenetic regulation genes e.g.: KDM6A (n=2), CREBBP (n=1) or ARID1A (n=1). KDM6A mutations leads to the loss of the highly-conserved C-terminal region (included Jumomji and Zinc binding domains) which is essential for its demethylase activity. Loss of KDM6A activity may sensibilise tumor cells to demethylating agents such as 5-azacytidine or EZH2 inhibitors. We analyzed at diagnosis and relapse serial samples from 5 patients (2 HCL and 3 HCL-v) and highlighted a clonal evolution of the disease. Conclusion: The Trichopanel is a useful tool for the diagnosis, relapse and prognosis of HCL and HCL-v.Introduction : la mutation BRAFV600E est retrouvĂ©e dans plus de 80% des cas de leucĂ©mie Ă  tricholeucocytes (HCL). RĂ©cemment des mutations additionnelles Ă  BRAFV600E ont Ă©tĂ© mises en Ă©vidence. MatĂ©riel et mĂ©thodes : un panel de 21 gĂšnes d’intĂ©rĂȘts (appelĂ© Trichopanel) a Ă©tĂ© sĂ©lectionnĂ© Ă  partir de la revue de la littĂ©rature des donnĂ©es de Whole Exome Sequencing. Nous avons analysĂ© 20 patients atteints d’HCL et 4 formes variantes (HCL-v) au diagnostic (dont 5 paires diagnostic/rechute). RĂ©sultats et discussion : le Trichopanel a Ă©tĂ© informatif dans 96% (23/24) des patients et a rĂ©vĂ©lĂ© des mutations dans BRAF (n=18), KLF2 (n=4), MAP2K1 (n=3), KDM6A (n=2), CDKN1B (n=2), ARID1A (n=2), CREBBP (n=2) NOTCH1 (n=1) et ARID1B (n=1). Parmi les patients porteurs de la mutation BRAFV600E d’autres mutations ont Ă©tĂ© trouvĂ©es dans 33% des cas (6/18). Les frĂ©quences allĂ©liques de ces mutations Ă©taient proche de celle de BRAFV600E suggĂ©rant qu’elles sont d’apparition prĂ©coce. Les 4 patients HCL-v prĂ©sentaient des mutations dans les gĂšnes de la rĂ©gulation Ă©pigĂ©nĂ©tique dont KDM6A (n=2). Ces mutations induiraient la perte du domaine C-terminal, hautement conservĂ© et essentiel pour l’activitĂ© dĂ©mĂ©thylase de la protĂ©ine. L’inactivation de KDM6A pourrait sensibiliser les cellules tumorales aux agents dĂ©mĂ©thylants tel que les inhibiteurs d’EZH2. Cinq patients (2HCL et 3 HCL-v) ont Ă©tĂ© analysĂ©s parallĂšlement au diagnostic et Ă  la rechute/Ă©volution. L’analyse des prĂ©lĂšvements Ă  la rechute a montrĂ© une Ă©volution clonale de la maladie. Conclusion : le Trichopanel est un outil facile d’utilisation en routine, utile Ă  la fois pour le diagnostic initial et la rechute des patients HCL et HCL-v

    Caractérisation multiomique de la leucémie à tricholeucocytes et des proliférations lymphoïdes B avec cellules villeuses circulantes

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    Hairy cell leukemia (HCL) and lymphoid proliferations with circulating villous cells (HCL-like) are rare diseases whose diagnosis can be tricky. The WHO 2022 classification made significant changes by including variant forms of hairy cell leukemia in a heterogeneous entity based on the presence of a prominent nucleolus. We wished by this study, to deciphering HCL and HCL-like by a multiomic approach: phenotypic, transcriptomic and genetic.In this work, we examined a large cohort of 116 patients (HCL n=91, HCL-like n=25) on an immunophenotypic panel of 13 markers. This highlighted the heterogeneity of the phenotypic expression and the importance of CD26 in the biological diagnosis.In addition, we analyzed the expression of RNA on 290 genes, we showed by this approach a deregulation of genes never described before in the HCL, involved particularly in the germinal center or the Nf-B pathway.Finally, we performed a high-throughput sequencing on 21 genes and IGHV repertory. These studies allowed us to split the different villous proliferations by providing arguments of poor prognosis of some molecular markers.This work sheds light on villous B cells proliferations the importance of biological analysis and the need for a combined approach in the classification.La leucĂ©mie Ă  tricholeucocytes (HCL) et les prolifĂ©rations lymphoĂŻdes Ă  cellules villeuses circulantes (HCL-like) sont des maladies rares donc le diagnostic peut ĂȘtre difficile. La classification OMS 2022, a apportĂ© des changements significatifs en incluant les formes variantes de la leucĂ©mie Ă  tricholeucocytes dans une entitĂ© hĂ©tĂ©rogĂšne basĂ©e sur la prĂ©sence d’un nuclĂ©ole proĂ©minent. Nous avons souhaitĂ© par cette Ă©tude, dĂ©membrer la HCL et des HCL-like au travers d’une approche multiomique : phĂ©notypique, transcriptomique et gĂ©nĂ©tique.Dans ce travail nous avons Ă©tudiĂ© une large cohorte de 116 patients (HCL n=91, HCL-like n=25) sur un panel immunophĂ©notypique de 13 marqueurs. Cette Ă©tude nous a permis de mettre en Ă©vidence une hĂ©tĂ©rogĂ©nĂ©itĂ© d’expression phĂ©notypique et des phĂ©notypes aberrants. De plus nous avons soulignĂ© l’utilitĂ© du CD26 dans le diagnostic biologique.Par ailleurs nous avons Ă©tudiĂ© l’expression d’ARN de 290 gĂšnes. Cette approche a permis de mettre en Ă©vidence une dĂ©rĂ©gulation de certains gĂšnes jamais dĂ©crits jusqu’alors dans la HCL et impliquĂ©s notamment dans le centre germinatif ou la voie Nf-B.Enfin nous avons rĂ©alisĂ© un panel de sĂ©quençage haut dĂ©bit de 21 gĂšnes (Trichopanel) et l’analyse du rĂ©pertoire des IGHV. Ces Ă©tudes ont aidĂ© Ă  mieux prĂ©ciser les diffĂ©rentes entitĂ©s en apportant Ă©galement des arguments de mauvais pronostics Ă  certains marqueurs molĂ©culaires.Ce travail apporte un Ă©clairage significatif sur les prolifĂ©rations villeuses, l’importance des diffĂ©rents tests biologiques et molĂ©culaire avec la nĂ©cessitĂ© d’une approche combinĂ©e et intĂ©grĂ©e de tous les outils Ă  notre disposition

    Caractérisation multiomique de la leucémie à tricholeucocytes et des proliférations lymphoïdes B avec cellules villeuses circulantes

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    Hairy cell leukemia (HCL) and lymphoid proliferations with circulating villous cells (HCL-like) are rare diseases whose diagnosis can be tricky. The WHO 2022 classification made significant changes by including variant forms of hairy cell leukemia in a heterogeneous entity based on the presence of a prominent nucleolus. We wished by this study, to deciphering HCL and HCL-like by a multiomic approach: phenotypic, transcriptomic and genetic.In this work, we examined a large cohort of 116 patients (HCL n=91, HCL-like n=25) on an immunophenotypic panel of 13 markers. This highlighted the heterogeneity of the phenotypic expression and the importance of CD26 in the biological diagnosis.In addition, we analyzed the expression of RNA on 290 genes, we showed by this approach a deregulation of genes never described before in the HCL, involved particularly in the germinal center or the Nf-B pathway.Finally, we performed a high-throughput sequencing on 21 genes and IGHV repertory. These studies allowed us to split the different villous proliferations by providing arguments of poor prognosis of some molecular markers.This work sheds light on villous B cells proliferations the importance of biological analysis and the need for a combined approach in the classification.La leucĂ©mie Ă  tricholeucocytes (HCL) et les prolifĂ©rations lymphoĂŻdes Ă  cellules villeuses circulantes (HCL-like) sont des maladies rares donc le diagnostic peut ĂȘtre difficile. La classification OMS 2022, a apportĂ© des changements significatifs en incluant les formes variantes de la leucĂ©mie Ă  tricholeucocytes dans une entitĂ© hĂ©tĂ©rogĂšne basĂ©e sur la prĂ©sence d’un nuclĂ©ole proĂ©minent. Nous avons souhaitĂ© par cette Ă©tude, dĂ©membrer la HCL et des HCL-like au travers d’une approche multiomique : phĂ©notypique, transcriptomique et gĂ©nĂ©tique.Dans ce travail nous avons Ă©tudiĂ© une large cohorte de 116 patients (HCL n=91, HCL-like n=25) sur un panel immunophĂ©notypique de 13 marqueurs. Cette Ă©tude nous a permis de mettre en Ă©vidence une hĂ©tĂ©rogĂ©nĂ©itĂ© d’expression phĂ©notypique et des phĂ©notypes aberrants. De plus nous avons soulignĂ© l’utilitĂ© du CD26 dans le diagnostic biologique.Par ailleurs nous avons Ă©tudiĂ© l’expression d’ARN de 290 gĂšnes. Cette approche a permis de mettre en Ă©vidence une dĂ©rĂ©gulation de certains gĂšnes jamais dĂ©crits jusqu’alors dans la HCL et impliquĂ©s notamment dans le centre germinatif ou la voie Nf-B.Enfin nous avons rĂ©alisĂ© un panel de sĂ©quençage haut dĂ©bit de 21 gĂšnes (Trichopanel) et l’analyse du rĂ©pertoire des IGHV. Ces Ă©tudes ont aidĂ© Ă  mieux prĂ©ciser les diffĂ©rentes entitĂ©s en apportant Ă©galement des arguments de mauvais pronostics Ă  certains marqueurs molĂ©culaires.Ce travail apporte un Ă©clairage significatif sur les prolifĂ©rations villeuses, l’importance des diffĂ©rents tests biologiques et molĂ©culaire avec la nĂ©cessitĂ© d’une approche combinĂ©e et intĂ©grĂ©e de tous les outils Ă  notre disposition

    Multiomic caracteization of hairy cell leukemia and villous B cells proliferations

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    La leucĂ©mie Ă  tricholeucocytes (HCL) et les prolifĂ©rations lymphoĂŻdes Ă  cellules villeuses circulantes (HCL-like) sont des maladies rares donc le diagnostic peut ĂȘtre difficile. La classification OMS 2022, a apportĂ© des changements significatifs en incluant les formes variantes de la leucĂ©mie Ă  tricholeucocytes dans une entitĂ© hĂ©tĂ©rogĂšne basĂ©e sur la prĂ©sence d’un nuclĂ©ole proĂ©minent. Nous avons souhaitĂ© par cette Ă©tude, dĂ©membrer la HCL et des HCL-like au travers d’une approche multiomique : phĂ©notypique, transcriptomique et gĂ©nĂ©tique.Dans ce travail nous avons Ă©tudiĂ© une large cohorte de 116 patients (HCL n=91, HCL-like n=25) sur un panel immunophĂ©notypique de 13 marqueurs. Cette Ă©tude nous a permis de mettre en Ă©vidence une hĂ©tĂ©rogĂ©nĂ©itĂ© d’expression phĂ©notypique et des phĂ©notypes aberrants. De plus nous avons soulignĂ© l’utilitĂ© du CD26 dans le diagnostic biologique.Par ailleurs nous avons Ă©tudiĂ© l’expression d’ARN de 290 gĂšnes. Cette approche a permis de mettre en Ă©vidence une dĂ©rĂ©gulation de certains gĂšnes jamais dĂ©crits jusqu’alors dans la HCL et impliquĂ©s notamment dans le centre germinatif ou la voie Nf-B.Enfin nous avons rĂ©alisĂ© un panel de sĂ©quençage haut dĂ©bit de 21 gĂšnes (Trichopanel) et l’analyse du rĂ©pertoire des IGHV. Ces Ă©tudes ont aidĂ© Ă  mieux prĂ©ciser les diffĂ©rentes entitĂ©s en apportant Ă©galement des arguments de mauvais pronostics Ă  certains marqueurs molĂ©culaires.Ce travail apporte un Ă©clairage significatif sur les prolifĂ©rations villeuses, l’importance des diffĂ©rents tests biologiques et molĂ©culaire avec la nĂ©cessitĂ© d’une approche combinĂ©e et intĂ©grĂ©e de tous les outils Ă  notre disposition.Hairy cell leukemia (HCL) and lymphoid proliferations with circulating villous cells (HCL-like) are rare diseases whose diagnosis can be tricky. The WHO 2022 classification made significant changes by including variant forms of hairy cell leukemia in a heterogeneous entity based on the presence of a prominent nucleolus. We wished by this study, to deciphering HCL and HCL-like by a multiomic approach: phenotypic, transcriptomic and genetic.In this work, we examined a large cohort of 116 patients (HCL n=91, HCL-like n=25) on an immunophenotypic panel of 13 markers. This highlighted the heterogeneity of the phenotypic expression and the importance of CD26 in the biological diagnosis.In addition, we analyzed the expression of RNA on 290 genes, we showed by this approach a deregulation of genes never described before in the HCL, involved particularly in the germinal center or the Nf-B pathway.Finally, we performed a high-throughput sequencing on 21 genes and IGHV repertory. These studies allowed us to split the different villous proliferations by providing arguments of poor prognosis of some molecular markers.This work sheds light on villous B cells proliferations the importance of biological analysis and the need for a combined approach in the classification

    Monoclonal B-cell lymphocytosis

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    International audienceFlow cytometry diagnostic practices can detect very low levels of clonal B cells in the peripheral blood. In the absence of clinical symptoms, cytopenia or organomegaly, the small clones may correspond to monoclonal B-cell leukemia (MBL) diagnosis. Most MBLs harbor a chronic lym-phocytic leukemia (CLL) phenotype (e.g., CD5 + , CD23 +) and are referred to as CLL-type MBL. The two other types are atypical CLL-type MBL and non-CLL-type MBL. In addition to the phe-notypical classification, the clonal B count is a major issue because of the impact on the prognosis and the risk of progression in CLL. It allows for the discrimination of two distinct types: high-count (HC) MBL and low-count (LC)-MBL based on a cutoff value of 0.5 × 10 9 /L clonal B cells. LC MBL appears to be very stable over time and is probably related to immunosenescence. Conversely, HC MBL could be a premalignant state before the occurrence of CLL

    Le téléphone comme outil de prévention du suicide (une analyse de littérature)

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    LILLE2-BU Santé-Recherche (593502101) / SudocSudocFranceF

    Variant form of hairy cell leukemia

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    International audienceMature lymphoid B-cell proliferations with hairy cells represent heterogeneous entities where specific diagnosis is difficult but important since it impacts therapeutic management. The clinical cases of variant hairy cell leukemia reported herein illustrate the persistence of a clear interest in the use of splenectomy as a therapeutic alternative. Furthermore, ibrutinib appears to be a promising treatment in patients with relapsed/refractory disease
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