Publications by authors named "Leroy M"

Aim(s): To investigate the impact of the absence of specific advice for oral fluid intake, compared to supplementation water intake on the occurrence of post-dural puncture headache.

Design: A prospective, open-label, non-inferiority, multicenter trial including hospitalized patients requiring a diagnostic lumbar puncture in seven hospitals in France.

Methods: Patients were randomly allocated (1:1) either to receive no specific advice on oral fluid intake (FREE-FLUID), or to be encouraged to drink 2 liters of water (CONTROL) within the 2 hours after lumbar puncture.

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Background: The cerebrospinal fluid (CSF) Aβ ratio has proven to be a more reliable biomarker for amyloid pathology than CSF Aβ in Alzheimer's disease (AD), helping to correctly classify patients with positive tau biomarkers (T+) that would otherwise have remained outside of the AD continuum. It was shown that the Aβ ratio better captures a relative decrease of Aβ in patients with high CSF Aβ. However, whether patients with high-amyloid (HiA) AD, in whom A+ is defined by the Aβ ratio, exactly compare with their low-amyloid (LoA) counterparts, in whom A+ is defined by Aβ solely, deserves further analysis.

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The ribosome-associated endoribonuclease Rae1 cleaves the Bacillus subtilis yrzI operon mRNA in a translation-dependent manner. This operon encodes up to four small peptides, S1027, YrzI, S1025, and S1024, whose functions are unknown. Here, we identified the function of YrzI and S1025 and deciphered the degradation pathways of the yrzI polycistronic mRNA.

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Rising air temperatures and permafrost degradation drive the erosion of palsas (permafrost mounds mainly composed of frozen peat and ice layers) and lead to the formation of thermokarst ponds and lakes, known for their high greenhouse gas (GHG) emissions. This study investigates the impact of permafrost soil erosion during thermokarst lake formation on microbial community structure and its implications for GHG dynamics in a highly degraded permafrost valley (Nunavik, northern Quebec, Canada). Samples were collected from a palsa, an emerging lake connected to the palsa, surrounding peat and soil pore water, and two mature lakes which are older, stratified, and less connected to the palsa.

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Introduction: This study aims to assess the economic impact of delays and inadequate diagnosis and treatment for neurodevelopmental disorders (NDDs) in France, affecting 2 to 3 million individuals. Neurodevelopmental disorders, including autism spectrum disorder (ASD), learning disabilities, and attention deficit hyperactivity disorder (ADHD), are often described as "invisible" disabilities, but they generate significant societal costs.

Method: The study was conducted with the support of Ashoka France as part of a collaboration between Goodwill-Management and the Aloïs Association.

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Introduction: The project, funded by the Agence Nationale de la Recherche, aims to evaluate the long-term outcomes of patients with oesophageal atresia (OA) between 13 and 14 years old and establish multiomics profiles using data from the world's biggest OA registry.

Methods And Analysis: is a national multicentre population-based cohort study recruiting participants from all qualified French centres for OA surgery at birth. The primary objective is to assess the prevalence of gastro-oesophageal reflux disease in adolescence among patients with OA, with several secondary objectives including the identification of risk factors and multiomic profiles from oesophageal biopsies and blood samples collected between 13 and 14 years old, compared with a control group.

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Background: A subgroup of CHDs can only be treated palliatively through a Fontan circulation. In case of a failing Fontan situation, serum proteins are lost unspecifically and can also lead to a loss of vaccine antibodies. In a failing Fontan situation, heart transplantation may be the only feasible option.

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Background: The correlation between the three-dimensional spatial representation (3DSR) abilities, specifically involving spatial orientation, spatial visualisation and spatial relationship, and the performance in exercises related to preclinical practical exams in fixed prosthodontics and removable partial denture is not studied.

Objective: Assess the correlation between the 3DSR abilities and the performance in exercises related to preclinical practical exams in fixed prosthodontics and removable partial denture carried out by second and third year dental students.

Materials And Methods: The 3DSR abilities (spatial orientation, spatial visualisation and spatial relationship) and the scores of preclinical practical exams in prosthetics were tested on 187 students.

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Background: To evaluate the acceptance and safety of the treatment of newborns with nirsevimab (a long-acting monoclonal antibody designed to prevent respiratory syncytial virus infections) during the first season of implementation.

Methods: A longitudinal, prospective, single-centre cohort study was conducted from September 18th, 2023, to January 23rd, 2024 at Lille University Hospital (Lille, France). All newborns admitted to the hospital's maternity department during the study period and whose parents agreed to participate in the study were included.

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  • The study assessed the effectiveness of the Apple Watch® in measuring transcutaneous oxygen saturation in children with cyanotic heart disease during a six-minute walk test.
  • Results showed that the Apple Watch® successfully measured saturation in most children, but was only reliable for those with higher saturation levels (above 85%).
  • The findings suggest using the Apple Watch® for monitoring oxygen saturation in children with mild cyanosis, but it is not recommended for those with moderate or severe cyanosis due to unreliable results.
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  • The study aimed to understand the recurrence rates of surgical issues in patients with Crohn's disease who underwent ileorectal anastomosis during the biologics era, noting that previous studies lacked data from this period.
  • In a cohort from 2006 to 2022, the findings revealed high rates of endoscopic (70%), clinical (59%), and surgical (35%) recurrence, particularly influenced by factors like the presence of perianal lesions.
  • Despite the challenges, the use of biologics was found to be beneficial, reducing the likelihood of needing a definitive stoma, indicating that IRA can still be a viable treatment option for extensive colitis in Crohn's patients, especially when managing perian
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Objective: To compare the ongoing pregnancy rate per initiated cycle between patients with functional hypothalamic amenorrhea (FHA) and patients with congenital hypogonadotropic hypogonadism (CHH) treated with pulsatile gonadotropin-releasing hormone (GnRH) administration.

Design: Retrospective monocentric cohort study conducted at the University Hospital of Lille from 2004 to 2022.

Subjects: A total of 141 patients diagnosed with central suprapituitary amenorrhea during infertility evaluation and subsequently treated with pulsatile GnRH therapy.

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  • A multicenter study involving 18 centers in 12 countries examined 360 patients with frontotemporal dementia (FTD) characterized by right anterior temporal lobe (RATL) atrophy to create a unified clinical description of the syndrome.
  • Key symptoms identified in patients included mental rigidity (78%), disinhibition (74%), and naming difficulties (70%), with cognitive tests revealing specific deficits in social interactions and emotional recognition, though lacking in measuring mental rigidity.
  • The findings represent the largest cohort of its kind, highlighting under-acknowledged symptoms of RATL and providing valuable insights for clinicians to improve early diagnosis and management of FTD patients.
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  • - During summer 2023, Europe saw a small uptick in mpox cases after a major outbreak in 2022, marked by peaks happening at different times in various countries!* - The demographic makeup of the new cases was similar to those from previous reports, maintaining the same trends.
  • - All collected case sequences from this recent resurgence belonged to clade IIb, highlighting the need for ongoing control efforts to eliminate mpox in the region.
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Solvation shells strongly influence the interfacial chemistry of colloidal systems, from the activity of proteins to the colloidal stability and catalysis of nanoparticles. Despite their fundamental and practical importance, solvation shells have remained largely undetected by spectroscopy. Furthermore, their ability to assemble at complex but realistic interfaces with heterogeneous and rough surfaces remains an open question.

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Background: Treatment delay in head and neck cancer is a major problem, with impact on survival. The COVID-19 (coronavirus disease 2019) pandemic, evolving in waves around the world, caused diagnostic and therapeutic delays in certain cancers. The main objective of the present study was to analyze whether there was a change in wait times during three successive waves in our center.

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Nivolumab was first authorized at a weight-based dose (WBD) of 3 mg/kg every two weeks (Q2W). Since 2017, a fixed dose (FD) regimen [first 240 mg Q2W and then 480 mg per month (Q4W)] was allowed. The objective of the study was to compare a WBD regimen and an FD regimen with regard to effectiveness and safety.

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Purpose: Sleep apnoea (SA) is associated with accelerated cognitive decline in patients with mild cognitive impairment (MCI). Treatment of SA by continuous positive airway pressure (CPAP) may slow this decline if patients comply with the treatment. The aim of this study was to assess the rate of CPAP compliance in this population.

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  • - Polymicrobial infections, like Pacific Oyster Mortality Syndrome (POMS), are complex and under-researched, involving interactions between the ostreid herpesvirus 1 (OsHV-1) and harmful bacteria impacting oyster populations on the French Atlantic coast.
  • - Field studies and laboratory experiments revealed that certain bacterial communities flourish in oysters infected with OsHV-1 and that these bacteria can enhance the virus's effects, leading to accelerated oyster mortality.
  • - Cooperative behaviors among bacteria, including promoting one another’s growth and sharing resources, play a significant role in the severity of POMS, suggesting that targeting these interactions may help manage the disease and protect oyster health.
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  • Disease emergence is increasing due to global changes, making it crucial to understand how host populations adapt rapidly, particularly in the context of Pacific oyster mortality syndrome (POMS).
  • The study used (epi)genome-wide association mapping to reveal that oysters exposed to POMS showed signs of genetic and epigenetic selection, particularly in genes related to immunity.
  • Results indicated that about one-third of the phenotypic variation in response to POMS could be attributed to interactions between genetic and epigenetic factors, highlighting the significant role of both in rapid adaptation to infectious diseases.
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Purpose: Scaphoid non-union treatment remains nonconsensual and is based on vascularized or non-vascularized bone grafting. This study aimed to evaluate with a long follow-up the functional, clinical, and radiological outcomes, reported complications and reoperations and studied non-union treatment prognostic factors.

Methods: Patients who had undergone bone graft surgery for scaphoid non-union were retrospectively reviewed.

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  • Dyspnea, a common symptom in asthma, is influenced by anxiety and hyperventilation, which often occur alongside the condition.
  • A study involving 142 asthmatic adults analyzed the sensory and affective aspects of dyspnea, revealing that many patients experienced severe symptoms linked to poor asthma control, hyperventilation, and anxiety.
  • Results showed significant reductions in dyspnea severity after six months, highlighting the importance of addressing both hyperventilation and anxiety for better asthma management.
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