Publications by authors named "Lefeuvre C"

Purpose: Heterozygous pathogenic variants in SPAST are known to cause Hereditary Spastic Paraplegia 4 (SPG4), the most common form of HSP, characterized by progressive bilateral lower limbs spasticity with frequent sphincter disorders. However, there are very few descriptions in the literature of patients carrying biallelic variants in SPAST.

Methods: Targeted Sanger sequencing, panel sequencing and exome sequencing were used to identify the genetic causes in 9 patients from 6 unrelated families with symptoms of HSP or infantile neurodegenerative disorder.

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The molecular diagnosis of type 1 facioscapulohumeral muscular dystrophy (FSHD1) relies on the detection of a shortened D4Z4 array at the 4q35 locus. Until recently, the diagnosis of FSHD2 relied solely on the absence of a shortened D4Z4 allele in clinically affected patients. It is now established that most FSHD2 cases carry a heterozygous variant in the SMCHD1 gene.

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Background: Spinal muscular atrophy (SMA) patients benefit from pre-mRNA splicing modifiers targeting the SMN2 gene, which aims to increase functional SMN production. The animal toxicity affecting spermatogenesis associated with one such treatment raised questions about male SMA patients' spermatogenesis.

Methods: This descriptive, cross-sectional study was conducted from June 2022 to July 2023.

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  • A study conducted in France during the 2023-24 RSV season analyzed the effectiveness of nirsevimab, a monoclonal antibody, in preventing RSV infections in infants, focusing on breakthrough cases.
  • Out of 695 RSV-infected infants, researchers sequenced the full-length RSV genome of 545 infants, identifying that 48% had breakthrough infections despite receiving nirsevimab.
  • While no resistance was found in RSV-A infections from nirsevimab-treated infants, two cases of RSV-B showed substitutions linked to resistance, indicating a potential concern for the antibody's effectiveness against this variant.
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  • - The R-PAct scale is designed to measure how Pompe disease affects daily life, and this study aimed to validate it for use in different languages and countries.
  • - Researchers created German, French, Italian, and Spanish versions of the scale and collected data from Pompe patients in several countries, combining it with existing data for analysis.
  • - Results showed that the modified R-PAct scale is valid and effectively measures two key areas of patient activity, with a minor adjustment made to improve its reliability across diverse populations.
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  • Late onset Pompe disease (LOPD) is a rare disorder that affects muscle function due to a lack of a specific enzyme, leading to issues such as macroglossia (enlarged tongue) and swallowing difficulties in patients.
  • A study of 100 adult LOPD patients revealed that 32% experienced some level of swallowing difficulties, with 20% dealing with daily dysphagia and 18% facing aspiration risks, yet only a small number were receiving help from speech therapists.
  • The findings suggest that common swallowing problems significantly affect patients' daily lives, highlighting the need for healthcare professionals to be more aware of these symptoms and to provide coordinated care involving specialists like speech therapists and dietitians.
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Cervical cancer (CC) was diagnosed in 3159 women in France in 2023, and 1117 died from it. Organized screening for cervical cancer is potentially very effective for participating women. However, reaching under-screened populations remains a major challenge.

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  • Congenital myasthenic syndromes (CMS) are genetic disorders that impact neuromuscular transmission, primarily identified in childhood but often diagnosed in adulthood, leading to challenges in management.
  • A study of 235 adult CMS patients in France revealed diverse genetic mutations and highlighted the need for ongoing care, as the prognosis and long-term outcomes remain unclear.
  • The research categorized patients based on the initial symptoms and found varied disease progression patterns, with certain genotypes showing higher rates of ICU admission and the stability of phenotypical features across a patient's life.
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  • Late-onset Pompe disease (LOPD) is a progressive muscle disorder caused by a deficiency in an enzyme, and switching to the drug avalglucosidase alfa has shown promise for patients not responding to the standard treatment, alglucosidase alfa.
  • A study analyzing data from the French Pompe registry found that after switching medications, patients exhibited stabilization in motor function, specifically in the Six-Minute Walk Test, while respiratory function remained largely unchanged.
  • Overall, while most patients experienced a slowdown in the decline of motor abilities after the switch, individual results varied, with some showing improvement and others continuing to decline.
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  • Enterovirus D68 (EV-D68) infections can cause severe respiratory issues and acute flaccid myelitis, with a significant rise reported during the fall-winter season of 2021-2022 across Europe.
  • The study by the European Non-Polio Enterovirus Network (ENPEN) analyzed over 10,481 samples from 19 countries, identifying 1,004 as EV-D68, predominantly affecting young children, where 37.9% required hospitalization.
  • Additionally, genetic analyses uncovered two new B3-derived lineages without regional patterns, indicating a notable impact of the infections and the emergence of new virus strains.
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  • In 2017, nusinersen, an injectable treatment for spinal muscular atrophy (SMA), was introduced, followed by the oral treatment risdiplam in 2020, leading to questions about appropriate care for adults with SMA due to limited data.
  • To standardize treatment access in France, a national SMA multidisciplinary team meeting (SMDT) was established in 2018 to support decision-making for adult patients.
  • An analysis of 107 patient cases showed that the SMDTs provided various treatment recommendations based on consultations, with most requests aimed at starting new treatments (nusinersen or risdiplam).
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Chronic hepatitis B virus (HBV) infection is one of the most common factors associated with hepatocellular carcinoma (HCC). However, the pathogenesis of HBV-mediated hepatocarcinogenesis is not clearly defined. Persistence of HBV infection is associated with HCC pathogenesis, and various HBV proteins appear to be involved in promoting this persistence.

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Self-sampling may improve participation in cervical cancer secondary prevention programs by women who do not respond or respond irregularly when invited to contact a health professional for the collection of a cervical specimen. It could also help resolve access problems in areas with a low physician density. The present qualitative study examined barriers to screening, effective screening strategies, and the advantages and disadvantages of sending women urine or vaginal self-sampling kits in two medically underserved administrative departments in France (Mayenne and Sarthe) showing low cervical screening coverage.

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  • The French Pompe Disease Registry was established in 2004 to track the progress of the disease in patients and evaluate the long-term effects of enzyme replacement therapy (ERT) with alglucosidase-alfa.
  • An update on 210 patients from the registry reveals that the median age of participants was almost 49, with many initially presenting symptoms like muscle weakness and respiratory issues, affecting their mobility significantly.
  • The findings indicate that awareness among doctors has improved, leading to earlier diagnoses and a decrease in the severity of cases at the time of inclusion, highlighting the registry's role in understanding and managing Pompe disease effectively.
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  • Human adenoviruses, particularly type F41, have been linked to cases of acute hepatitis in children since January 2022, with increased reports of infections following hematopoietic stem cell transplants (HSCT) in adults.
  • A study in two French hospitals found that four adult HSCT recipients diagnosed with HAdV-F41 also exhibited symptoms of diarrhea and liver cytolysis, with three patients showing HAdV viremia but no severe disease dissemination.
  • The research included genomic sequencing of the virus from patients, revealing similar strains and co-infections with other viruses in some cases, marking the first documented instance of liver cytolysis during HAdV-F41 infection in this patient group.
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Introduction: Home noninvasive ventilation (NIV), targeting a reduction of carbon dioxide with a combination of sufficient inspiratory support and backup-rate improves outcomes in patients with chronic obstructive pulmonary disease. The aim of this systematic review with individual participant data (IPD) meta-analysis was to evaluate the effects of intensity of home NIV on respiratory outcomes in individuals with slowly progressive neuromuscular (NMD) or chest-wall disorders (CWD).

Methods: Controlled, non-controlled and cohort studies indexed between January-2000 and December-2020 were sought from Medline, Embase and the Cochrane Central Register.

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Introduction: The evaluation of clinical trial (CT) safety is the main task of CT vigilance units. In addition to the management of adverse events, the units must review the literature to identify information that may impact the benefit-risk assessment of studies. In this survey, we investigated the literature monitoring (LM) activity of French Institutional Vigilance Units (IVU) from the working group "REflexion sur la VIgilance et la SEcurite des essais cliniques" (REVISE).

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Background And Purpose: Amyloid myopathy is a rare and severe manifestation of systemic light chain (AL) amyloidosis. Early diagnosis and staging are mandatory for optimal therapy, given the rapid progression of muscle weakness. Despite the efficacy of bortezomib-based treatment regimens, there is a lack of therapeutic alternatives in non-responsive patients.

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The A1762T/G1764A double mutant in the basal core promoter (BCP) region of the hepatitis B virus (HBV) is associated with severe hepatic lesions while the G1899A mutation with the double mutant is associated with a significant reduction in the risk of severe fibrosis. This study aims to measure a number of markers in the serum of patients with chronic HBV infection and to assess relationships between these markers and BCP/precore mutants with consideration of the stage of fibrosis. The serum levels of resistin, TGF-β1, MMP-1, TIMP-1, collagen IA1 and PDGF-BB, which are markers that are known to be involved in the process of hepatic fibrosis, were assayed.

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Background: Pompe disease is a rare neuromuscular disorder caused by a deficiency of a lysosomal enzyme, acid α-glucosidase. Macroglossia is a classic clinical sign of several inherited myopathies and has also been reported to occur progressively in late-onset Pompe disease (LOPD).

Methods: We describe patients with LOPD and macroglossia included in the French national Pompe disease registry.

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The cervical cancer screening coverage remains moderate (60%) in France. The aim of the study is to evaluate the efficacy of two experimental invitation strategies (offer of urine or vaginal self-sampling kits) to reach under-screened populations and compare them with the current invitation strategy in rural departments (low medical density and low participation rate) in France. The study is a randomised controlled trial with three arms: a control arm (conventional invitation letter) and two experimental arms (mailing of a urine or vaginal self-sampling kit).

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Acute hepatitis B (AHB) is usually asymptomatic, but it can progress to chronic hepatitis B (HB) defined by HB surface antigen (HBsAg) persisting beyond 6 months. Nevertheless, the delay of HBsAg seroclearance is not well-defined. During pregnancy, the immune system of the pregnant women is altered and delayed HBsAg loss can be observed, leading to chronic infection.

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