Publications by authors named "Roy Charlotte"

Macrophages fight infection and ensure tissue repair, often operating at nutrient-poor wound sites. We investigated the ability of human macrophages to metabolize glycogen. We observed that the cytokines GM-CSF and M-CSF plus IL-4 induced glycogenesis and the accumulation of glycogen by monocyte-derived macrophages.

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Visual working memory depends on both material-specific brain areas in the ventral visual stream (VVS) that support the maintenance of stimulus representations and on regions in the prefrontal cortex (PFC) that control these representations. How executive control prioritizes working memory contents and whether this affects their representational formats remains an open question, however. Here, we analyzed intracranial EEG (iEEG) recordings in epilepsy patients with electrodes in VVS and PFC who performed a multi-item working memory task involving a retro-cue.

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Background: Elexacaftor-tezacaftor-ivacaftor has been approved in Europe for people with cystic fibrosis with at least one F508del CFTR variant. Additionally, it is approved by the US Food and Drug Administration (FDA) for people with cystic fibrosis with at least one of 177 rare variants. The aims of this study were to describe the clinical response to elexacaftor-tezacaftor-ivacaftor for people with cystic fibrosis without a F508del CFTR variant in France and to determine CFTR variant responsiveness to elexacaftor-tezacaftor-ivacaftor based on the observed clinical response.

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Background: Glioblastoma (GB), the most aggressive brain cancer, remains a critical clinical challenge due to its resistance to conventional treatments. Here, we introduce a locoregional targeted-α-therapy (TAT) with the rat monoclonal antibody 9E7.4 targeting murine syndecan-1 (SDC1) coupled to the α-emitter radionuclide astatine-211 (At-9E7.

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Article Synopsis
  • Children with cystic fibrosis (CF) often face acute respiratory failure due to severe pulmonary exacerbations, leading to pediatric intensive care unit (PICU) admissions, with a focus on understanding their short and medium-term outcomes.
  • A study reviewed data from patients under 18 years old admitted to a French PICU over two decades, utilizing statistical methods to identify factors influencing mortality and the need for lung transplants.
  • Results indicated high mortality rates (up to 41% within 3 years post-discharge) and identified key risk factors like gender, certain blood gas levels, and pre-admission health conditions, highlighting the critical need for early consideration of lung transplants as a survival option.
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Small interfering RNA (siRNA) holds great potential to treat many difficult-to-treat diseases, but its delivery remains the central challenge. This study aimed at investigating the suitability of polymer-lipid hybrid nanomedicines (HNMeds) as novel siRNA delivery platforms for locoregional therapy of glioblastoma. Two HNMed formulations were developed from poly(lactic-co-glycolic acid) polymer and a cationic lipid: 1,2-dioleoyl-3-trimethylammonium-propane (DOTAP) or 3ß-[N-(N',N'-dimethylaminoethane)-carbamoyl]cholesterol (DC-Chol).

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Pulmonary alveolar proteinosis (PAP) results from the accumulation of lipoproteinaceous material in the alveoli and alveolar macrophages, and can be associated with pulmonary fibrosis, with a need for lung transplantation (LTx). Causes of PAP are autoimmune (90%-95%), secondary (5%), or hereditary (<1%). Patients with hereditary PAP are generally not considered for isolated LTx, due to the high probability of recurrence after LTx, and only a challenging scenario with sequential LTx followed by hematopoietic stem cell transplantation (HSCT) was reported as successful.

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Introduction: As pleural inflammation plays a central role in pleural infection (PI), corticosteroids are increasingly being considered as a potential therapy. However, the timing of treatment and the identification of patients who might benefit most remain unresolved. The aim of this study was therefore to investigate the inflammatory trajectories of children with PI.

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NTPDase1/CD39, the major vascular ectonucleotidase, exerts thrombo-immunoregulatory function by controlling endothelial P2 receptor activation. Despite the well-described release of ATP from endothelial cells, few data are available regarding the potential role of CD39 as a regulator of arterial diameter. We thus investigated the contribution of CD39 in short-term diameter adaptation and long-term arterial remodeling in response to flow using male mice.

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In view of inevitable recurrences despite resection, glioblastoma (GB) is still an unmet clinical need. Dealing with the stromal-cell derived factor 1-alpha (SDF-1α)/CXCR4 axis as a hallmark of infiltrative GB tumors and with the resection cavity situation, the present study described the effects and relevance of a new engineered micro-nanostructured SF-HA-Hep aerogel sponges, made of silk fibroin (SF), hyaluronic acid (HA) and heparin (Hep) and loaded with SDF-1α, to interfere with the GB ecosystem and residual GB cells, attracting and confining them in a controlled area before elimination. 70 µm-pore sponges were designed as an implantable scaffold to trap GB cells.

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Objective: The objective was to identify the highest quality global emergency medicine (GEM) research published in 2022. The top articles are compiled in a comprehensive list of all the year's GEM articles and narrative summaries are performed on those included.

Methods: A systematic PubMed search was conducted to identify all GEM articles published in 2022 and included a manual supplemental screen of 11 organizational websites for gray literature (GRAY).

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New technologies enable the creation of digital twin systems (DTS) combining continuous data collection from children's home and artificial intelligence (AI)-based recommendations to adapt their care in real time. The objective was to assess whether children and adolescents with asthma would be ready to use such DTS. A mixed-method study was conducted with 104 asthma patients aged 8 to 17 years.

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Neonicotinoids have been detected in many species of wild birds; however, few studies have quantified population-level exposure. We examined population-level exposure to 7 neonicotinoids in 2 species that use agricultural areas, sharp-tailed grouse (Tympanuchus phasianellus) and greater prairie-chickens (T. cupido).

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The Tigray crisis in Ethiopia is a grave humanitarian catastrophe with causes and consequences that resemble the Nigerian Civil War that ended with the defeat of secessionist Biafra five decades ago. As in the Biafra example, an ethnically distinct and embattled enclave is surrounded by hostile forces and cut off from commerce of any kind, producing starvation, forced migrant encampments, and pervasive dependence on externally provided food relief. Relief action strategies developed during the Nigerian Civil War were comprised of operational components that were often insufficiently integrated into a unified system for nutritional screening, referral, acute care, nutritional rehabilitation, and team deployment.

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Visual landmarks provide crucial information for human navigation. But what characteristics define a landmark? To be uniquely recognized, a landmark should be distinctive and salient, while providing precise and accurate positional information. It should also be permanent.

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We present the case of a 73-year-old male patient who presented with obstructive urinary symptoms, pelvic pressure, and hematuria. CT imaging revealed a heterogenous prostate enlargement, and MRI demonstrated the mass to be arising from the seminal vesicle. Prostate biopsies showed benign tissue.

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Article Synopsis
  • Glioblastoma (GB) is a highly aggressive brain tumor, and its growth depends on iron metabolism, which may influence the effectiveness of radiation therapy.
  • Recent studies found that the expression of ceruloplasmin (CP), a key iron regulator, changes in response to radiation, prompting an investigation of how CP affects GB cell responses to radiation under varying oxygen levels.
  • The findings reveal that manipulating CP expression in GB cell lines affects cell survival and DNA repair mechanisms, suggesting that higher CP levels enhance the effectiveness of radiotherapy on GB cells.
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Objective: The objective was to identify the most important and impactful peer-reviewed global emergency medicine (GEM) articles published in 2021. The top articles are summarized in brief narratives and accompanied by a comprehensive list of all identified articles that address the topic during the year to serve as a reference for clinicians, researchers, and policy makers.

Methods: A systematic PubMed search was carried out to identify all GEM articles published in 2021.

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Background: Epidemics and other complex emergencies historically have had a disproportionate impact on women and girls, increasing their vulnerability to gender-based violence (GBV). The COVID-19 pandemic has been no different, with reports of rising cases of GBV emerging worldwide. Already a significant problem in Kenya, Uganda, Nigeria, and South Africa, GBV in these countries has been exacerbated by government restrictions intended to contain the spread of COVID-19.

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Effective treatments are scarce in non-operable scalp cutaneous angiosarcoma patients. Curative-intent definitive sequential IMRT and plesiobrachytherapy allowed complete response with limited side effect in two elder patients. This could represent a non-invasive therapeutic option for patients with locally advanced presentation.

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West Nile virus (WNV) was introduced to North America two decades ago, but for many species, including Ruffed Grouse (Bonasa umbellus), the effects of WNV on individuals and populations remain poorly understood. Recent studies suggest the effect of WNV on Ruffed Grouse might vary among geographic regions, depending on habitat conditions. We studied WNV in Minnesota, US, during 2018-19, in a region known to have abundant Ruffed Grouse habitat and a population cycling around a stable long-term average.

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Rational: Pending the authorization of new anti-CMV drugs with fewer adverse effects, exploring the possibilities offered by CMV immunoglobulins (CMVIG) seems necessary. In France, access to CMVIG requires official authorization by the national Health authority and is restricted to second line rescue therapy for CMV infection/disease. The aim of this multicenter retrospective study is to describe the indications and clinical situations that justified its use in France.

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We describe an unvaccinated child at risk for life-threatening COVID-19 due to an inherited deficiency of IRF9, which governs ISGF-3-dependent responses to type I and III interferons (IFN). She was admitted, with a high nasal SARS-CoV-2 load on day 1 of upper respiratory tract infection. She was viremic on day 2 and received casirivimab and imdevimab.

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(1) Background: Post-transplant lymphoproliferative disease (PTLD) is a significant complication of solid organ transplantation (SOT). However, there is lack of consensus in PTLD management. Our aim was to establish a present benchmark for comparison between international centers and between various organ transplant systems and modalities; (2) Methods: A cross-sectional questionnaire of relevant PTLD practices in pediatric transplantation was sent to multidisciplinary teams from 17 European center members of ERN TransplantChild to evaluate the centers' approach strategies for diagnosis and treatment and how current practices impact a cross-sectional series of PTLD cases; (3) Results: A total of 34 SOT programs from 13 European centers participated.

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