Publications by authors named "Marc Delord"

Objectives: The gastrointestinal tract (GIT) is a reservoir of multidrug-resistant organisms (MDRO). Colonisation with MDRO precedes invasive infections, which can be challenging to treat with excess morbidity and mortality compared to antimicrobial-susceptible infections. Currently, there are no effective GIT decolonisation strategies.

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Background: Up to 50% of kidney transplant patients are diagnosed with delayed graft function (DGF) following transplantation-the majority being linked to ischaemia reperfusion injury (IRI). DGF is traditionally defined as the requirement for dialysis during the first week after transplantation and is associated with inferior graft and patient outcomes. Local synthesis of complement components, largely by the renal tubule, plays a critical role in IRI.

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Multimorbidity is characterized by the accrual of two or more long-term conditions (LTCs) in an individual. This state of health is increasingly prevalent and poses public health challenges. Adapting approaches to effectively analyse electronic health records is needed to better understand multimorbidity.

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The maintenance of stable allograft status in the absence of immunosuppression (IS), known as operational tolerance, can be achieved in a small proportion of liver transplant recipients, but we lack reliable tools to predict its spontaneous development. We conducted a prospective, multicenter, biomarker-strategy design, IS withdrawal clinical trial to determine the utility of a predictive biomarker of operational tolerance. The biomarker test, originally identified in a patient cohort with high operational tolerance prevalence, consisted of a 5-gene transcriptional signature measured in liver tissue collected before initiating IS weaning.

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Background: We aimed to identify and characterise the longitudinal patterns of multimorbidity associated with stroke.

Methods: We used an unsupervised patient-oriented clustering approach to analyse primary care electronic health records (EHR) of 30 common long-term conditions (LTC) in patients with stroke aged over 18, registered in 41 general practices in south London between 2005 and 2021.

Results: Of 849,968 registered patients, 9,847 (1.

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  • Hematopoietic multipotent progenitors (MPPs) in the bone marrow can differentiate into various cell types, influenced by both intrinsic and extrinsic signals, with WHIM syndrome patients exhibiting an excess of myeloid cells due to CXCR4 signaling mutations.
  • Research using knock-in mice with WHIM-associated mutations showed that MPP4 cells, which usually develop into lymphoid cells, instead skewed towards myeloid differentiation due to increased mTOR signaling and altered oxidative phosphorylation.
  • Treatment with CXCR4 antagonist AMD3100 or mTOR inhibitor rapamycin reversed this myeloid bias, indicating that normal CXCR4 function is crucial for maintaining the lymphoid potential of MPP4 cells by regulating
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Purpose: The use of inotuzumab ozogamicin (InO), a conjugated anti-CD22 monoclonal antibody, is becoming a promising frontline treatment for older patients with ALL.

Patients And Methods: EWALL-INO is an open-label prospective multicenter phase II trial (ClinicalTrials.gov identifier: NCT03249870).

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Invariant natural killer T (NKT) cell subsets are defined based on their cytokine-production profiles and transcription factors. Their distribution is different in C57BL/6 (B6) and BALB/c mice, with a bias for NKT1 and NKT2/NKT17 subsets, respectively. Here, we show that the non-classical class I-like major histocompatibility complex CD1 molecules CD1d2, expressed in BALB/c and not in B6 mice, could not account for this difference.

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Purpose: To assess outcomes and predictors of long-term myocardial dysfunction after cardiac arrest (CA) of cardiac origin.

Methods: We retrospectively included consecutive, single-center, prospective-registry patients who survived to hospital discharge for adult out-of-hospital and in-hospital CA of cardiac origin in 2005-2019. The primary objective was to collect the 1-year New York Heart Association Functional Class (NYHA-FC) and major adverse cardiovascular events (MACE).

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  • Scientists are trying to understand how certain immune cells, called lymphocytes, develop in our bodies.
  • They found that there are different paths these cells can take, and new types of cells called multi-lymphoid progenitors (MLPs) form before becoming either NK, ILC, T cells, or B cells.
  • The way these cells grow and develop is really different depending on the kind of immune cell they will become, and the scientists discovered new important steps and controls in this process.
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Background: Pediatric acute liver failure (PALF) carries a high mortality without liver transplantation (LT) in children. Liver transplantation, though lifesaving, is limited by timely donor organ availability, the risks of major surgery and complications of life-long immunosuppression. Hepatocyte transplantation (HT) improves synthetic and detoxification functions in small animal models.

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  • The study focuses on a new immunotherapy approach called T4, designed to treat locally advanced/recurrent head and neck squamous cell carcinoma (HNSCC) by targeting upregulated ErbB proteins in tumor cells.
  • This phase 1 trial involved injecting engineered CAR T-cells directly into tumors, with doses provided in escalating amounts, and showcased that these T-cells could be successfully manufactured from patient blood without toxic effects.
  • In terms of results, the treatment showed manageable side effects (mostly mild) and demonstrated localized persistence of T-cells in the tumor site, however, it did not halt rapid tumor progression in patients.
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Background: This study was carried out to compare characteristics and outcomes in patients with acute respiratory failure related to COVID-19 during first, second, and third waves.

Methods: We included consecutive adults admitted to the intensive care unit between March 2020 and July 2021. We compared three groups defined by the epidemic intake phase: waves 1 (W1), 2 (W2), and 3 (W3).

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Background: The objective of this study was to measure bone mineral density (BMD) of the cancellous bone in both femoral condyles and to compare the results according to the hip-knee-ankle (HKA) angle in patients with knee osteoarthritis.

Hypothesis: BMD of cancellous bone in the medial condyle is markedly lower in valgus knees compared to that in the lateral condyle in varus knees.

Methods: Consecutive patients with computed tomography (CT) of the knee and long-leg radiographs obtained in preparation for total knee arthroplasty were included.

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  • * A total of 133 patients were assessed, and of the 86 who were identified as underdosed, those in the TDM group had higher imatinib levels and a significantly better major molecular response (MMR) at 12 months (67% for TDM vs. 39% for control).
  • * TDM proved to be a feasible approach that not only heightened drug levels but also maintained a positive impact on treatment outcomes for up to three years.
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Background And Aims: Ileocolonic resection is frequently needed in the course of Crohn's disease [CD] treatment and post-operative recurrence is extremely common. Our main objective was to analyse gene expression in the mucosa of CD patients at the time of surgery and at post-operative endoscopy, in order to identify predictors and mechanisms of early endoscopic recurrence.

Methods: We conducted transcriptome analyses on ileal mucosa samples collected from inflamed sections of the surgical specimens [n = 200], from ileal resection margins [n = 149] and in the neo-terminal ileum 6 months after surgery [n = 122]; these were compared with non-inflammatory bowel disease controls [n = 25].

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  • - The study examined the impact of ventilator type on hospital mortality for patients with ARDS due to COVID-19 in a French ICU from March 2020 to July 2021.
  • - Out of 189 patients, factors such as age over 70, immunodeficiency, and high serum creatinine levels were linked to higher mortality, while the type of ventilator used did not influence survival rates.
  • - Both ICU settings (standard vs. transient ICU with simpler ventilators) showed similar lengths of mechanical ventilation and ICU stays, indicating that less complex ventilators did not lead to worse patient outcomes.
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Purpose: Vismodegib is approved for the treatment of locally advanced basal cell carcinoma (laBCC), but some cases demonstrate intrinsic resistance (IR) to the drug. We sought to assess the frequency of IR to vismodegib in laBCC and its underlying genomic mechanisms.

Experimental Design: Response to vismodegib was evaluated in a cohort of 148 laBCC patients.

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  • BET inhibitors (BETi) like OTX015 and JQ1 show promise against AML, but their detailed effects haven't been fully explored yet.
  • The combination of all-trans retinoic acid (ATRA) and arsenic trioxide (ATO) is effective in AML, as both BETi and ATO + ATRA can promote cell differentiation and apoptosis.
  • Preclinical findings indicate that BETi may work by degrading the NPM1c protein and altering the balance with BRD4 in cells, while some AML cell lines, like IMS-M2, exhibit resistance due to certain genetic pathways.
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  • Atopic dermatitis (AD) is a common and complex skin condition, and understanding it better for personalized treatments is still a challenge despite advances in research.* -
  • A research team used an unsupervised method on a large dataset of skin biopsies to identify 222 specific genes related to AD, which helped them classify the samples into 4 distinct groups based on disease characteristics and severity.* -
  • The findings revealed different biological pathways associated with each group, suggesting new approaches for tailored treatment strategies in managing atopic dermatitis.*
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