Publications by authors named "Guylene Le Meur"

Article Synopsis
  • RORA is a gene linked to the development and function of the cerebellum, and this study explores the largest group of individuals with RORA-related neurodevelopmental disorders (RORA-NDD).
  • The study involved 40 participants with various pathogenic variants of RORA, revealing a range of clinical features including developmental and intellectual disabilities, as well as cerebellar symptoms that can vary in onset and severity.
  • Findings indicate that certain missense variants are associated with more severe cerebellar issues, and common elements of RORA-NDD include developmental disabilities, cerebellar symptoms, and different types of myoclonic epilepsy.
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Purpose: The last updates to diagnostic criteria for multiple sclerosis (MS) included a diagnostic category of 'possible MS'. However, no recent data is available to assess how much this distinction helps predict MS after isolated optic neuritis (ON). This study aimed to assess the global risk of developing MS one year after a first ON episode, and the specific risk according to the initial diagnosis of isolated ON or ON with possible MS.

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Introduction: Classically, Usher syndrome is characterized by the association of sensorineural hearing loss (SNHL), retinitis pigmentosa (RP) and possible vestibular dysfunction. Pathogenic bi-allelic variants in cause atypical autosomal recessive Usher syndrome, which is associated with SNHL and photoreceptors dysfunction without vestibular signs. To date, only 19 scattered descriptions have been reported.

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Introduction: Training novice ophthalmology residents on the EyeSi simulator increases cataract surgery safety. However, there is no consensus regarding how much training residents should perform before their first time on patients. We evaluated the French national training program through the analysis of the learning curves of novice residents.

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Background: This case report explores the relationship between genetics and phenotypic variability in autosomal dominant vitreoretinochoroidopathy (ADVIRC). The study focuses on a case presenting a novel mutation in the gene and its phenotype in the case's relatives, shedding light on the structural and functional intricacies underlying this rare ophthalmologic disorder.

Case Presentation: A 33-year-old female presented for consultation with a history of bilateral retinal damage accompanied by a complaint of decreased visual acuity, progressive visual field deficit, and night blindness over the past year.

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In living children, the use of a wide field fundus camera such as RetCam is the gold standard practice to document retinal haemorrhages in suspected cases of abusive head trauma (AHT). In case of sudden unexpected death in infancy (SUDI), child abuse must be considered as a possible cause of death and an eye examination is required. However, no example of post-mortem fundus photograph (PMFP) of retinal haemorrhages related to AHT is yet available for clinicians.

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Inherited retinal diseases are a leading and untreatable cause of blindness and are therefore candidate diseases for gene therapy. Recombinant vectors derived from adeno-associated virus (rAAV) are currently the most promising vehicles for therapeutic gene delivery to the retina. However, there is a need for novel AAV-based vectors with greater efficacy for ophthalmic applications, as underscored by recent reports of dose-related inflammatory responses in clinical trials of rAAV-based ocular gene therapies.

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Background: The 30-day readmission rate provides a standardised quantitative evaluation of some postoperative complications. It is widely used worldwide in many medical and surgical specialities, and the World Health Organization recommends its use for monitoring healthcare system performance. In ophthalmology, its measurement is biased by the frequent and close planned surgery on one eye and then the other, particularly in the case of cataract surgery.

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Introduction: The aim of this study was to assess the efficacy and safety of fluocinolone acetonide implant (FAci) injected 1 month after the last dexamethasone intravitreal implant (DEXi) in chronic diabetic macular oedema (DME) patients.

Methods: Retrospective multicentric study conducted in pseudophakic patients with chronic DME frequently treated with dexamethasone intravitreal implant (DEXi; time to DME recurrence ≤ 6 months), receiving FAci 1 month after the last DEXi, with at least a 6-month follow-up. Best-corrected visual acuity (BCVA), central macular thickness (CMT) on optical coherence tomography, intraocular pressure (IOP) and additional treatments were assessed on the day of FAci injection (M0), 1 (M1) and 3 months (M3) later and then every 3 months.

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The subretinal injection protocol for the only approved retinal gene therapy (voretigene neparvovec-rzyl) includes air tamponade at the end of the procedure, but its effects on the subretinal bleb have not been described. In the present study, we evaluated the distribution of enhanced green fluorescent protein (EGFP) after subretinal injection of AAV2 in non-human primates (NHP) without (group A = 3 eyes) or with (group B = 3 eyes) air tamponade. The retinal expression of EGFP was assessed 1 month after subretinal injection with fundus photographs and fundus autofluorescence.

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We report the 51/2 year prevalence of visual and oculomotor impairments in preterm children born at 24−34 weeks’ gestation (WG) using the population-based cohort study EPIPAGE-2, set in France, 2011. The main outcomes were imputed prevalence of refractive errors (REs), strabismus, and binocular visual acuity (VA). Children were clinically assessed by specially trained pediatricians.

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Article Synopsis
  • Peters' anomaly (PA) is a rare eye condition marked by issues like corneal opacity and adhesions related to the eye's anterior segment, linked to several genes such as B3GLCT and PAX6.
  • Researchers studied 95 PA patients using advanced genetic techniques and found genetic defects in about one-third of them, with B3GLCT and PAX6 being the most common culprits.
  • Notably, they discovered SOX2, a gene associated with microphthalmia, in some PA patients, highlighting its unexpected role in this condition and the need for further genetic exploration in PA cases.
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Background: Hyperglycemia in preterm infants may be associated with severe retinopathy of prematurity (ROP) and other morbidities. However, it is uncertain which concentration of blood glucose is associated with increased risk of tissue damage, with little consensus on the cutoff level to treat hyperglycemia. The objective of our study was to examine the association between hyperglycemia and severe ROP in premature infants.

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Background: Inherited retinal disorders are a clinically and genetically heterogeneous group of conditions and a major cause of visual impairment. Common disease subtypes include vitelliform macular dystrophy (VMD) and retinitis pigmentosa (RP). Despite the identification of over 90 genes associated with RP, conventional genetic testing fails to detect a molecular diagnosis in about one third of patients with RP.

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Purpose: To measure the predictive values of relative afferent pupillary defect (RAPD) assessed semi-quantitatively, and visual acuity (VA) at onset of central retinal vein occlusion (CRVO), for neovascularization.

Methods: Retrospective analysis of the TROXHEMO trial that included patients with CRVO within 30 days after the onset. Inclusion criteria were as follows: semi-quantitative RAPD assessment at diagnosis and/or at one month.

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Article Synopsis
  • Retinitis pigmentosa is the most common inherited retinal disorder causing blindness, and gene therapy is emerging as a revolutionary treatment option.
  • Luxturna, a gene therapy approved by both the FDA and EMA in late 2017 and 2018, is effective for patients with certain genetic mutations related to this condition.
  • The paper explores recent advances in gene therapy for retinitis pigmentosa while addressing the technological, economic, and ethical challenges that need to be addressed to enhance its application in medical practice.
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Kinesin-2 enables ciliary assembly and maintenance as an anterograde intraflagellar transport (IFT) motor. Molecular motor activity is driven by a heterotrimeric complex comprised of KIF3A and KIF3B or KIF3C plus one non-motor subunit, KIFAP3. Using exome sequencing, we identified heterozygous KIF3B variants in two unrelated families with hallmark ciliopathy phenotypes.

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Article Synopsis
  • A study was conducted to determine the prevalence of antibodies to myelin oligodendrocyte glycoprotein (MOG-Ab) in adults with optic neuritis (ON) and identify specific ON cases for testing.
  • Among 65 patients, MOG-Ab was present in 14% during acute ON and 13% after excluding those with multiple sclerosis (MS).
  • MOG+ON cases were more commonly bilateral and associated with optic disc swelling, highlighting that testing for MOG-Ab should focus on patients with these characteristics to effectively identify MOG+ON while reducing unnecessary tests.
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Microphthalmia with brain and digital anomalies (MCOPS6, MIM# 607932) is an autosomal dominant disorder caused by loss-of-function variants or large deletions involving BMP4, which encodes bone morphogenetic protein 4, a member of the TGF-β protein superfamily. BMP4 has a number of roles in embryonic development including neurogenesis, lens induction, development of cartilage and bone, urogenital development, limb and digit patterning, hair follicle regeneration, as well as tooth formation. In addition to syndromic microphthalmia, BMP4 variants have been implicated in non-syndromic cleft lip with or without cleft palate and congenital healed cleft lip indicating different allelic presentations.

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Purpose: To date, no protocol of anesthesia for pediatric ophthalmic surgery is unanimously recognized. The primary anesthetic risks are associated with strabismus surgery, including oculocardiac reflex, postoperative nausea and vomiting, and postoperative pain.

Methods: This was a prospective, monocentric, observational study conducted in a tertiary pediatric ophthalmic unit.

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Two distinct syndromes arise from pathogenic variants in the X-linked gene BCOR (BCL-6 corepressor): oculofaciocardiodental (OFCD) syndrome, which affects females, and a severe microphthalmia ('Lenz'-type) syndrome affecting males. OFCD is an X-linked dominant syndrome caused by a variety of BCOR null mutations. As it manifests only in females, it is presumed to be lethal in males.

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The aim of this study was the evaluation of the safety and efficacy of unilateral subretinal injection of the adeno-associated vector (AAV) serotypes 2 and 4 (AAV2/4) RPE65-RPE65 vector in patients with Leber congenital amaurosis (LCA) associated with RPE65 gene deficiency. We evaluated ocular and general tolerance and visual function up to 1 year after vector administration in the most severely affected eye in nine patients with retinal degeneration associated with mutations in the RPE65 gene. Patients received either low (1.

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