Publications by authors named "Sylvain Choquet"

Objective: Evaluating long-term outcomes following cementoplasty in patients with multiple myeloma (MM).

Methods: This is a single-center, retrospective study on all cementoplasties performed between January 2012 and December 2017. Patients with MM with a control MRI or CT scan beyond 5 years after the procedure were included.

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Primary mediastinal large B-cell lymphoma (PMBL) is a rare entity that predominantly affects young female patients and typically presents as a large and compressive anterior mediastinal mass. Accumulating evidence suggests relationships among PMBL patient body composition (BC), cancer outcomes, and treatment-related toxicities. The aim of this study was to evaluate the impact of BC on PMBL patients using PET-CT images acquired pretreatment.

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Backgorund Aims: CAR-T cells have been proposed as a new treatment option for primary and secondary central nervous system lymphoma (CNSL). However, whether CAR-T cell features contribute to response and toxicity in CNSL remains elusive.

Methods: Twenty-four patients with primary and secondary CNSL treated with tisagenlecleucel were retrospectively included in this study.

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Tyrosine kinase inhibitors (TKIs) targeting BCR::ABL1 have greatly improved the survival of patients with chronic myeloid leukemia (CML), and their teratogenicity appears as an important factor for individuals of childbearing potential. This study aims to investigate pregnancy and fetal/newborn adverse outcomes resulting from exposure to BCR::ABL1-TKIs during pregnancy. For this disproportionality analysis, we used the WHO's global VigiBase up to January 2024, and included reports involving pregnancy, antineoplastic treatment during pregnancy, and cancer.

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CD95L is a transmembrane cytokine mainly expressed by activated T and natural killer cells to contract the immune response through cell-cell contact. Conversely, after cleavage by metalloproteases, this ligand releases a soluble CD95L (sCD95L) that stimulates the immune response and its antitumor activity. In posttransplant lymphoproliferative disorders (PTLDs), we hypothesized that the concentration of sCD95L could exert a biological function and affect clinical outcomes by modulating the immune response.

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In immunocompetent patients, primary central nervous system lymphoma (PCNSL) typically presents with homogeneously enhancing brain lesions and high 18F-FDG avidity, ranging from 2 to 5 times higher than that of healthy tissue at baseline. We present the case of a 34-year-old woman in whom PCNSL recurrence was questioned due to the appearance of mildly increased glucose metabolism (1.3 times higher than normal contralateral tissue) and FLAIR hypersignals, despite the absence of contrast enhancement or cerebrospinal fluid abnormalities.

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Objectives: Mutational dynamics of SARS-CoV-2 in immunocompromised hosts, although well documented, remain a relatively unexplored mechanism. This study aims to compare the viral replication load and genetic diversity of SARS-CoV-2 in immunocompromised patients and non-immunocompromised individuals (NICs) from two major hospitals in Paris from January 2021 to May 2023.

Methods: Cycle threshold (CT) values were measured by TaqPath COVID-19 RT-PCR (Thermo Fisher Scientific).

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Persons with diffuse large B cell lymphoma (DLBCL) refractory or in first progression/relapsed (R/R) after chimeric antigen receptor T (CAR-T) cell therapy exhibit dramatic outcomes. We enrolled such persons in a phase 2 single-arm, nonblinded trial ( NCT04703686 ) to evaluate the efficacy and safety of glofitamab, a CD20-CD3 T cell-engaging bispecific antibody, using a short ramp-up regimen to reach full dose within 1 week. A total of 46 participants received at least one glofitamab infusion following obinutuzumab (anti-CD20 monoclonal antibody) pretreatment.

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Background: In the phase I Epi-RCHOP study (NCT02889523), we reported that R-CHOP-tazemetostat was well tolerated with the recommended phase II dose, consistent with monotherapy.

Methods: Phase II included newly diagnosed diffuse large B cell lymphoma patients aged 60-80 years who received six cycles of rituximab-CHOP (R-CHOP) with continuous tazemetostat (800 mg BID), plus two cycles of tazemetostat and rituximab (cycles 7 and 8), from July 31, 2020 to July 18, 2022. Primary endpoint was positron emission tomography complete metabolic response (CMR).

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Chimeric antigen receptor (CAR)-based therapies developed for the treatment of haematological malignancies have recently been repurposed to treat refractory systemic autoimmune diseases. In this Review we critically discuss the current data available on the use of CAR-based therapy in systemic autoimmune diseases, the current challenges, and the potential next steps toward their implementation into clinical practice. Beyond the targeting of B cells via CD19, we discuss the advantages and potential pitfalls of targeting plasma cells (B-cell Maturation Antigen or CD138) and other non-immune targets, such as fibroblast activated protein, and of aiming to restore immune homeostasis using CAR T regulatory cells.

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Background And Objectives: Several recent studies have shown the promising efficacy of chimeric antigenic receptor (CAR) T cells in treating CNS lymphomas. However, data on neurotoxicity in this setting are limited. The objective of this study was to describe neurotoxicity in patients with CNS lymphoma treated with anti-CD19 CAR T cells and to identify risk factors.

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Human T lymphotropic virus type 1 (HTLV-1) chronic infection is maintained through mitotic proliferation of the infected CD4+ T cells, where the viral genome is integrated as a provirus in its host genome. HTLV-1 integration sites (ISs) have a part in HTLV-1-associated pathologies, with distinct IS patterns associated with malignant proliferation or inflammatory diseases. However, IS determination remains challenging because most assays rely on complex biological and biocomputing protocols.

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Introduction: Antinuclear antibodies (ANA) exhibit diverse specificities and are crucial biomarkers in autoimmune disease assessment. Among ANA, anti-centromere protein-F (CENP-F) antibodies have garnered interest due to their association with malignancies. This study aims to characterize the clinical and biological profiles of a large cohort of anti-CENP-F positive patients and evaluate associated diagnoses.

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Background: Primary central nervous system lymphoma (PCNSL) treatment relies on a high-dose methotrexate based chemotherapy (HD-MTX-based CT) regimen; however, whether there is a specific microbiota composition association with treatment response and clinical outcomes remains incompletely understood.

Methods: We conducted a prospective study of PCNSL patients, included in the clinical trial NCT02313389 and the ancillary study NCT04253496 from 2020 to 2023, where patients were treated with first line HD-MTX-based polychemotherapy without a consolidation treatment. Stool (n=52), cerebrospinal fluid (CSF, n=52), and plasma samples (n=35) were collected before and/or after therapy initiation to perform metagenomic, flow cytometry, and metabolomic analyses.

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The peripheral blood lymphocyte-to-monocyte ratio (LMR) has been shown to predict outcomes in follicular lymphoma (FL). Among 1018 patients from the RELEVANCE trial (for previously untreated, high tumour burden FL), the median LMR was 2.5 (range, 0.

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T-cell malignancies following chimeric antigen receptor (CAR) therapies are partly related to insertional mutagenesis, but the longitudinal evolution of CAR-integration sites (IS) remains understudied. We performed an IS analysis in blood from three tisagenlecleucel (lentiviral), one axicabtagene-ciloleucel and one brexucabtagene-autoleucel (gammaretrovirals) patient at peak expansion and 1-year follow-up. All were complete responders.

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Due to immunosuppressive treatment, COVID-19 vaccination is challenging in patients with B-cell lymphoma. We prospectively evaluated CD4, CD8 T-cell and serological responses to the COVID-19 mRNA vaccine in a cohort of patients treated for a B-cell lymphoma with anti-CD20 therapy. During lymphoma treatment, CD4, CD8, and CD19 cell dropped.

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The risk of T cell malignancies after chimeric antigen receptor (CAR) T cell therapy is a concern, although the true incidence remains unclear. Here we analyzed the DESCAR-T registry database, encompassing all pediatric and adult patients with hematologic malignancies who received CAR T cell therapy in France since 1 July 2018. Of the 3,066 patients included (2,536 B cell lymphoma, 162 B cell acute lymphoblastic leukemia (ALL) and 368 multiple myeloma), 1,680 (54.

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Article Synopsis
  • Vitreoretinal lymphoma (VRL) has a poor prognosis due to high relapse rates in the central nervous system, requiring treatments like high-dose chemotherapy with autologous stem cell transplantation (HCT-ASCT).
  • A study analyzed 38 adult patients treated with HCT-ASCT for isolated VRL over 11 years, showing that 84% received a thiotepa-based regimen, with some patients experiencing serious side effects.
  • Results revealed a significant relapse rate, particularly in the brain, but the strategy showed relatively good median survival rates: 96 months for progression-free survival and 92 months overall.
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BACKGROUND Focal segmental glomerulosclerosis (FSGS) very rarely occurs in patients with multiple myeloma. Much more common are renal impairments secondary to monoclonal light-chain tubulopathy, AL amyloidosis, light-chain deposition disease, and the so-called monoclonal gammopathy of renal significance. CASE REPORT We report the case of a 79-year-old myeloma patient without noticeable medical problems but with a long history of myeloma treatment beginning 13 years ago.

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