Impaired vitreous composition and retinal pigment epithelium function in the FoxG1::LRP2 myopic mice.

Impaired vitreous composition and retinal pigment epithelium function in the FoxG1::LRP2 myopic mice. Biochim Biophys Acta. 2017 Mar 30;: Authors: Cases O, Obry A, Ben-Yacoub S, Augustin S, Joseph A, Toutirais G, Simonutti M, Christ A, Cosette P, Kozyraki R Abstract High myopia (HM) is one of the main causes of visual impairment and blindness all over the world and an unsolved medical problem. Persons with HM are predisposed to other eye pathologies such as retinal detachment, myopic retinopathy or glaucomatous optic neuropathy, complications that may at least partly result from the extensive liquefaction of the myopic vitreous gel. To identify the involvement of the liquid vitreous in the pathogenesis of HM we here analyzed the vitreous of the recently described highly myopic low density lipoprotein receptor-related protein 2 (Lrp2)-deficient eyes. Whereas the gel-like fraction was not apparently modified, the volume of the liquid vitreous fraction (LVF) was much higher in the myopic eyes. Biochemical and proteome analysis of the LVF revealed several modifications including a marked decrease of potassium, sodium and chloride, of proteins involved in ocular tissue homeostasis and repair as well as of ADP-ribosylation factor 4 (ARF4), a protein possibly involved in LRP2 trafficking. A small number of proteins, mainly comprising known LRP2 ligands or proteins of the inflammatory response, were over expressed in the mutants. Moreover the morphology of the L...
Source: Biochimica et Biophysica Acta - Category: Biochemistry Authors: Tags: Biochim Biophys Acta Source Type: research

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A child receives treatment in the northeastern district of Mymensingh, Bangladesh. Credit: Naimul Haq/IPS By External SourceGENEVA, Oct 8 2019 (IPS) A staggering 2.2 billion people already suffer from eye conditions and visual impairment today, but the global need for eye care is set to increase “dramatically”, with lack of exercise a key factor, the UN health agency said on Tuesday, unveiling its first ever report on vision across the world. While welcoming recent successes in eliminating common conditions such as trachoma in eight countries, the World Health Organization (WHO) highlighted evidence indicating ...
Source: IPS Inter Press Service - Health - Category: International Medicine & Public Health Authors: Tags: Global Headlines Health TerraViva United Nations Source Type: news
CONCLUSIONS: Our study suggests lower BW within the normal range is causally associated with a more myopic refractive error. However, the impact of the causal effect was modest (range 1.00 D covering approximately 95% of the population). PMID: 31097437 [PubMed - as supplied by publisher]
Source: The British Journal of Ophthalmology - Category: Opthalmology Authors: Tags: Br J Ophthalmol Source Type: research
CONCLUSION: A complete family history allowed determination of the inheritance pattern providing genetic counseling for patients and their families. The geno-phenotypic attributes of this heterozygosity suggest a correlation between RP and PM. This novel mutation would expand the mutation spectrum of RP2 and RPGR, and help to study molecular pathogenesis of RP. PMID: 31033374 [PubMed - as supplied by publisher]
Source: Ophthalmic Genetics - Category: Opthalmology Tags: Ophthalmic Genet Source Type: research
Discussion Nystagmus is periodic eye movement that is involuntary where there is a slow drift of fixation. The slow drift can be followed by a fast saccade back to fixation. The pathological movement is the slow phase, but nystagmus is described by the fast phase (i.e. horizontal nystagmus, vertical nystagmus). Spasmus nutans (SN) is a movement disorder that is rare. The classic triad includes nystagmus, head bobbing or titubation, and torticollis, with these problems being in the absence of any ophthalmological or neurological condition. Onset is in the first year of life but ranges from 6-36 months. Time to resolution ...
Source: PediatricEducation.org - Category: Pediatrics Authors: Tags: Uncategorized Source Type: news
Discussion Nystagmus is periodic eye movement that is involuntary where there is a slow drift of fixation. The slow drift can be followed by a fast saccade back to fixation. The pathological movement is the slow phase, but nystagmus is described by the fast phase (i.e. horizontal nystagmus, vertical nystagmus). Spasmus nutans (SN) is a movement disorder that is rare. The classic triad includes nystagmus, head bobbing or titubation, and torticollis, with these problems being in the absence of any ophthalmological or neurological condition. Onset is in the first year of life but ranges from 6-36 months. Time to resolution ...
Source: PediatricEducation.org - Category: Pediatrics Authors: Tags: Uncategorized Source Type: news
Authors: Hamed SA Abstract INTRODUCTION: Ocular dysfunctions and toxicities induced by antiepileptic drugs (AEDs) are rarely reviewed and not frequently received attention by treating physicians compared to other adverse effects (e.g. endocrinologic, cognitive and metabolic). However, some are frequent and progressive even in therapeutic concentrations or result in permanent blindness. Although, some adverse effects are non-specific, others are related to the specific pharmacodynamics of the drug. Areas covered: This review was written after detailed search in PubMed, EMBASE, ISI web, SciELO, Scopus and Cochrane Ce...
Source: Expert Review of Clinical Pharmacology - Category: Drugs & Pharmacology Tags: Expert Rev Clin Pharmacol Source Type: research
AbstractMyopia is one of the most common ocular disorders in the world, yet the genetic etiology of the disease remains poorly understood. Specialized founder populations, such as the Pennsylvania Amish, provide the opportunity to utilize exclusive genomic architecture, like unique haplotypes, to better understand the genetic causes of myopia. We perform genetic linkage analysis on Pennsylvania Amish families that have a strong familial history of myopia to map any potential causal variants and genes for the disease. 293 individuals from 25 extended families were genotyped on the Illumina ExomePlus array and merged with pr...
Source: Human Genetics - Category: Genetics & Stem Cells Source Type: research
DISCUSSION: These morphological alterations can possibly be explained by a new formation and elongation of the BM in the equatorial region leading to sagittal elongation of the eyeball. PMID: 30796602 [PubMed - as supplied by publisher]
Source: Der Ophthalmologe - Category: Opthalmology Authors: Tags: Ophthalmologe Source Type: research
ConclusionIntravitreal ranibizumab is a highly cost-effective intervention for the treatment of CNV due to causes other than nAMD and PM as it delivers substantial QALY gains to patients while making cost savings vs. BSC.FundingNovartis Pharmaceuticals UK Ltd.
Source: Advances in Therapy - Category: Drugs & Pharmacology Source Type: research
Authors: Tsang SH, Aycinena ARP, Sharma T Abstract Gyrate atrophy is an autosomal recessive dystrophy in which night blindness starts early in the first decade of life. In the early stages, large areas of retinal pigment epithelium (RPE) and choriocapillaris (CC) atrophy in the far periphery (lobular shape, Fig. 37.1). (In choroideremia, atrophy appears in the mid periphery.) Later, these areas coalesce to form a characteristic scalloped border at the junction of healthy and diseased RPE. Myopia and subcapsular cataract are common by the end of second or third decade. Unlike in choroideremia (which is X-linked), pa...
Source: Advances in Experimental Medicine and Biology - Category: Research Tags: Adv Exp Med Biol Source Type: research
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