As distrofias corneanas posteriores referem-se a um grupo de distrofias corneanas (CDs) raras geneticamente determinadas, caracterizadas por lesões que afetam o endotélio corneano e a membrana de Descemet, e efeitos variáveis na visão, dependendo do tipo de distrofia.
Introdução
O que você precisa saber de cara
As distrofias corneanas posteriores referem-se a um grupo de distrofias corneanas (CDs) raras geneticamente determinadas, caracterizadas por lesões que afetam o endotélio corneano e a membrana de Descemet, e efeitos variáveis na visão, dependendo do tipo de distrofia.
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Escala de raridade
<1/50kMuito rara
1/20kRara
1/10kPouco freq.
1/5kIncomum
1/2k
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Sinais e sintomas
O que aparece no corpo e com que frequência cada sintoma acontece
Partes do corpo afetadas
+ 16 sintomas em outras categorias
Características mais comuns
Os sintomas variam de pessoa para pessoa. Abaixo estão as 45 características clínicas mais associadas, ordenadas por frequência.
Linha do tempo da pesquisa
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Genética e causas
O que está alterado no DNA e como passa nas famílias
Genes associados
8 genes identificados com associação a esta condição. Padrão de herança: Autosomal dominant, Autosomal recessive, X-linked recessive.
Macromolecular component of the subendothelium. Major component of the Descemet's membrane (basement membrane) of corneal endothelial cells. Also a component of the endothelia of blood vessels. Necessary for migration and proliferation of vascular smooth muscle cells and thus, has a potential role in the maintenance of vessel wall integrity and structure, in particular in atherogenesis (By similarity)
Secreted, extracellular space, extracellular matrix, basement membrane
Corneal dystrophy, Fuchs endothelial, 1
A corneal disease caused by loss of endothelium of the central cornea. It is characterized by focal wart-like guttata that arise from Descemet membrane and develop in the central cornea, epithelial blisters, reduced vision and pain. Descemet membrane is thickened by abnormal collagenous deposition.
Transcription factor that binds to the immunoglobulin enhancer Mu-E5/KE5-motif. Involved in the initiation of neuronal differentiation. Activates transcription by binding to the E box (5'-CANNTG-3'). Binds to the E-box present in the somatostatin receptor 2 initiator element (SSTR2-INR) to activate transcription (By similarity). Preferentially binds to either 5'-ACANNTGT-3' or 5'-CCANNTGG-3'
Nucleus
Pitt-Hopkins syndrome
A syndrome characterized by intellectual disability, wide mouth and distinctive facial features, and intermittent hyperventilation followed by apnea. Features include intellectual disability with severe speech impairment, normal growth parameters at birth, postnatal microcephaly, breathing anomalies, severe motor developmental delay, motor incoordination, ocular anomalies, constipation, seizures, typical behavior and subtle brain abnormalities.
Acts as a transcriptional repressor. Inhibits interleukin-2 (IL-2) gene expression. Enhances or represses the promoter activity of the ATP1A1 gene depending on the quantity of cDNA and on the cell type. Represses E-cadherin promoter and induces an epithelial-mesenchymal transition (EMT) by recruiting SMARCA4/BRG1. Represses BCL6 transcription in the presence of the corepressor CTBP1. Positively regulates neuronal differentiation. Represses RCOR1 transcription activation during neurogenesis. Repr
Nucleus
Corneal dystrophy, posterior polymorphous, 3
A subtype of posterior corneal dystrophy, a disease characterized by alterations of Descemet membrane presenting as vesicles, opacities or band-like lesions on slit-lamp examination and specular microscopy. Affected patient typically are asymptomatic.
Transcription factor playing an important role in primary neurulation and in epithelial development (PubMed:25152456, PubMed:29309642). Binds directly to the consensus DNA sequence 5'-AACCGGTT-3' acting as an activator and repressor on distinct target genes (By similarity). During embryogenesis, plays unique and cooperative roles with GRHL3 in establishing distinct zones of primary neurulation. Essential for closure 3 (rostral end of the forebrain), functions cooperatively with GRHL3 in closure
NucleusMembrane
Deafness, autosomal dominant, 28
A form of non-syndromic sensorineural hearing loss. Sensorineural deafness results from damage to the neural receptors of the inner ear, the nerve pathways to the brain, or the area of the brain that receives sound information. DFNA28 is characterized by mild to moderate hearing loss across most frequencies that progresses to severe loss in the higher frequencies by the fifth decade.
Zinc-finger transcription repressor factor (PubMed:19700410). Plays a critical role in maintaining the identity of epithelial lineages by suppressing epithelial-to mesenchymal transition (EMT) mainly through the repression of ZEB1, an EMT inducer (By similarity). Positively regulates neuronal differentiation (By similarity). Suppresses cell cycling and terminal differentiation of keratinocytes by directly repressing MYC and NOTCH1 (PubMed:19700410). Important for the correct development of primo
Nucleus
Corneal dystrophy, posterior polymorphous, 1
A rare corneal disorder characterized by small aggregates of apparent vesicles bordered by a gray haze at the level of Descemet membrane, an altered corneal endothelial cell structure, and an unusual proliferation of endothelial cells. Symptoms can range from very aggressive to asymptomatic and non-progressive, even within the same family.
Binds to the 37-bp core of the locus control region (LCR) of the red/green visual pigment gene cluster (PubMed:10903837). May regulate the activity of the LCR and the cone opsin genes at earlier stages of development (PubMed:10903837). Dispensable in early retinal development (By similarity)
Nucleus
Keratoconus 1
Frequent corneal dystrophy with an incidence that varies from 50 to 230 per 100'000. The cornea assumes a conical shape as a result of a progressive non-inflammatory thinning of the corneal stroma. Keratoconus is most often an isolated sporadic condition with cases of autosomal dominant and autosomal recessive transmission.
Metallocarboxypeptidase that mediates deglutamylation of tubulin and non-tubulin target proteins. Catalyzes the removal of polyglutamate side chains present on the gamma-carboxyl group of glutamate residues within the C-terminal tail of tubulin protein. Specifically cleaves tubulin long-side-chains, while it is not able to remove the branching point glutamate. Also catalyzes the removal of polyglutamate residues from the carboxy-terminus of non-tubulin proteins such as MYLK
Cytoplasm, cytosol
Corneal dystrophy, Fuchs endothelial, 8
A corneal disease caused by loss of endothelium of the central cornea. It is characterized by focal wart-like guttata that arise from Descemet membrane and develop in the central cornea, epithelial blisters, reduced vision and pain. Descemet membrane is thickened by abnormal collagenous deposition.
Multifunctional transporter with an impact in cell morphology and differentiation. In the presence of borate B(OH)4(-), acts as a voltage-dependent electrogenic Na(+)-coupled B(OH)4(-) cotransporter controlling boron homeostasis (PubMed:15525507). At early stages of stem cell differentiation, participates in synergy with ITGA5-ITGB1 and ITGAV-ITGB3 integrins and BMPR1A to promote cell adhesion and contractility that drives differentiation toward osteogenic commitment while inhibiting adipogenesi
Cell membraneBasolateral cell membrane
Corneal dystrophy and perceptive deafness
An ocular disease characterized by the association of corneal clouding with progressive perceptive hearing loss.
Medicamentos e terapias
Mecanismo: Rho-associated protein kinase inhibitor
Mecanismo: Rho-associated protein kinase inhibitor
Mecanismo: Rho-associated protein kinase inhibitor
Mecanismo: Cyclooxygenase inhibitor
Variantes genéticas (ClinVar)
551 variantes patogênicas registradas no ClinVar.
Vias biológicas (Reactome)
12 vias biológicas associadas aos genes desta condição.
Diagnóstico
Os sinais que médicos procuram e os exames que confirmam
Tratamento e manejo
Remédios, cuidados de apoio e o que precisa acompanhar
Onde tratar no SUS
Hospitais de referência no Brasil e o protocolo oficial do SUS (PCDT)
🇧🇷 Atendimento SUS — Distrofia da córnea posterior
Selecione um estado ou use sua localização para ver resultados.
Dados de DATASUS/CNES, SBGM, ABNeuro e Ministério da Saúde. Sempre confirme a disponibilidade diretamente com o estabelecimento.
Pesquisa ativa
Ensaios clínicos abertos e novidades científicas recentes
Ensaios em destaque
🟢 Recrutando agora
4 pesquisas recrutando participantes. Converse com seu médico sobre a possibilidade de participar.
Outros ensaios clínicos
0 ensaios clínicos encontrados.
Publicações mais relevantes
Update on the Surgical Management of Fuchs Endothelial Corneal Dystrophy.
Fuchs endothelial corneal dystrophy (FECD) is the most common posterior corneal dystrophy and the leading indication for corneal transplantation in the United States. FECD is slowly progressive, and patients develop gradual corneal endothelial decompensation, eventually resulting in failure of the endothelium to maintain corneal deturgescence. Medical management consists of topical hyperosmotic agents to facilitate dehydration of the cornea, but surgical intervention is often required to regain corneal clarity. The surgical management of FECD has evolved over the past two decades as corneal transplantation techniques have allowed for more selective keratoplasty and replacement of only the diseased layers of the cornea. Prior surgical management consisted of penetrating keratoplasty (PK) that carried significant intraoperative risks associated with "open sky" as well as postoperative risks of graft rejection, wound dehiscence, postoperative astigmatism, and prolonged visual rehabilitation. In the past 15 years, endothelial keratoplasty (EK) has become the treatment of choice for endothelial disease, significantly reducing the risks associated with the surgical treatment of FECD. Here we discuss the current surgical management of FECD, including the introduction of Descemet stripping only (DSO), and highlight future investigative efforts.
[Posterior polymorphous dystrophy, case report and literature review].
Posterior Polymorphous Dystrophy (DPP) is a rare posterior corneal dystrophy that is genetically transmitted as autosomal dominant. Corneal structures affected in this dystrophy are Descemet membrane and the endothelium. A case is presented on a 47 years old woman with no relevant history, with typical findings of DPP (vesicular and band lesions at the endothelium and posterior Descemet). To our knowledge there are no reported cases of DPP in Latin-American patients in the literature. The clinical manifestations in our patient were found to be very similar to the cases reported in other populations.
Publicações recentes
Update on the Surgical Management of Fuchs Endothelial Corneal Dystrophy.
[Posterior polymorphous dystrophy, case report and literature review].
Zeb1 mutant mice as a model of posterior corneal dystrophy.
Rupture of the anterior lens capsule in Alport syndrome.
[Polymorphic posterior corneal dystrophy. Histological and ultrastructural study of 2 cases].
Associações
Organizações que acompanham esta doença — pra ter apoio e orientação
Ainda não temos associações cadastradas para Distrofia da córnea posterior.
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Comunidades
Grupos ativos de quem convive com esta doença aqui no Raras
Ainda não existe comunidade no Raras para Distrofia da córnea posterior
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Referências e fontes
Bases de dados externas citadas neste artigo
Publicações científicas
Artigos indexados no PubMed ligados a esta doença no grafo RarasNet — título, periódico e PMID direto da fonte, sem intermediação de IA.
- Update on the Surgical Management of Fuchs Endothelial Corneal Dystrophy.
- [Posterior polymorphous dystrophy, case report and literature review].
- Zeb1 mutant mice as a model of posterior corneal dystrophy.
- Rupture of the anterior lens capsule in Alport syndrome.
- [Polymorphic posterior corneal dystrophy. Histological and ultrastructural study of 2 cases].
Bases de dados e fontes oficiais
Identificadores e referências canônicas usadas para montar este verbete.
- ORPHA:98627(Orphanet)
- MONDO:0020214(MONDO)
- GARD:19520(GARD (NIH))
- Variantes catalogadas(ClinVar)
- Busca completa no PubMed(PubMed)
- Q55789211(Wikidata)
Dados compilados pelo RarasNet a partir de fontes abertas (Orphanet, OMIM, MONDO, PubMed/EuropePMC, ClinicalTrials.gov, DATASUS, PCDT/MS). Este conteúdo é informativo e não substitui avaliação médica.
Conteúdo mantido por Agente Raras · Médicos e pesquisadores podem colaborar
