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1.
Arq. bras. oftalmol ; 82(4): 336-338, July-Aug. 2019. graf
Article in English | LILACS | ID: biblio-1019412

ABSTRACT

ABSTRACT Aniridia is a congenital eye disorder with a variable degree of hypoplasia or absence of iris tissue. It is caused by loss of function of the PAX6 gene and may be an isolated ocular abnormality or part of a syndrome. WAGRO refers to a rare genetic condition leading to Wilms tumor, aniridia, genitourinary anomalies, mental retardation, and obesity and is caused by a deletion of the short arm of chromosome 11 (11p), where the PAX6 gene is located. Here, we report on an 8-year-old boy with aniridia, polar cataract, and lens subluxation along with neuropsychomotor and speech delays. Karyotype evaluation showed an interstitial deletion including region 11p13-p14, confirming the diagnosis of WAGRO syndrome. In cases of aniridia, a diagnosis of WAGRO syndrome should be considered.


RESUMO A aniridia é uma doença ocular congênita com grau variável de hipoplasia ou ausência do tecido da íris. É causada pela perda de função do gene PAX6 e pode ser uma anormalidade ocular isolada ou parte de uma síndrome. WAGRO refere-se a uma condição genética rara que leva ao tumor de Wilms, aniridia, anomalias geniturinárias, déficit intelectual e obesidade e é causada por uma deleção do braço curto do cromossomo 11 (11p), onde o gene PAX6 está localizado. Aqui, nós relatamos um menino de 8 anos de idade com aniridia, catarata polar e subluxação do cristalino, além de retardo neuropsicomotor e de fala. A avaliação cariotípica revelou uma deleção intersticial envolvendo a região 11p13-p14, confirmando o diagnóstico da síndrome WAGRO. Em casos de aniridia, um diagnóstico de síndrome de WAGRO deve ser considerado.


Subject(s)
Humans , Male , Child , Cataract/diagnosis , Aniridia/diagnosis , Lens Subluxation/diagnosis , WAGR Syndrome/diagnosis , Obesity/diagnosis , Cataract/genetics , Chromosomes, Human, Pair 11/genetics , Aniridia/genetics , Lens Subluxation/genetics , Chromosome Deletion , WAGR Syndrome/genetics , Karyotype , Obesity/genetics
2.
Indian J Pediatr ; 2009 May; 76(5): 513-517
Article in English | IMSEAR | ID: sea-142199

ABSTRACT

The developmental birth eye disorder of iris is known as aniridia. Heterozygous PAX6 gene, which causes human aniridia and small eye in mice, is located on chromosome 11p13. The variability had been documented between the affected individuals within the families, is due to genotypic variation. Haploinsufficiency renders PAX6 allele non-functional or amorphic, however it presents hypomorphic or neomorphic alleles. India is not a well-studied ethnic group, hence the focus on congenital aniridia gene analysis supports the literature and the phenotypic association were analysed both in sporadic as well as familial. The consistent association of truncating PAX6 mutations with the phenotype is owing to non-sensemediated decay (NMD). It is presumed that the genetic impact of increased homozygosity and heterozygocity in Indian counter part arises as the consequence of consanguineous marriages. The real fact involved in congenital aniridia with other related phenotypes with PAX6 mutations are still controversial.


Subject(s)
Aniridia/epidemiology , Aniridia/ethnology , Aniridia/genetics , Aniridia/therapy , Child, Preschool , Counseling , Female , Gene Expression Regulation, Developmental , Genetic Predisposition to Disease , Genetic Testing , Genotype , Humans , India/epidemiology , Infant , Infant, Newborn , Male , Mutation , Neonatal Screening , Paired Box Transcription Factors/genetics , Phenotype , Risk Assessment
3.
Article in English | IMSEAR | ID: sea-46724

ABSTRACT

The WAGR syndrome is a multiple congenital anomaly-mental retardation syndrome caused by interstitial deletion of the distal portion of chromosome 11p13. It is a contiguous gene deletion syndrome, and WAGR is an acronym for the primary features: W for Wilms tumor, A for aniridia, G for genital anomalies, and R for mental retardation. Wilms tumor and male genital anomalies are caused by deletion of the WT1 tumor-suppressor gene, and aniridia is caused by deletion of PAX6 ocular developmental gene. Mental retardation is presumed to be a consequence of deletion of multiple as yet unidentified genes in the region. Individuals with the WAGR syndrome have a high risk for developing Wilms tumor and late-onset renal failure, and should be monitored for these complications.


Subject(s)
Aniridia/genetics , Eye Proteins/genetics , Gene Deletion , Genitalia, Male/abnormalities , Homeodomain Proteins/genetics , Humans , Infant , Male , Intellectual Disability/genetics , Paired Box Transcription Factors/genetics , Repressor Proteins/genetics , WAGR Syndrome/diagnosis , Wilms Tumor/diagnosis
4.
Genet. mol. biol ; 23(3): 535-9, Sept. 2000. ilus
Article in English | LILACS, BVSAM | ID: lil-288980

ABSTRACT

O estudo citogenético convencional em uma menina com aniridia esporádica resultou em uma aparente translocaçäo balanceada t(11;13)(p13;q33) de novo. Entretanto, o estudo citogenético pela hibridaçäo in situ fluorescente (FISH) detectou a presença de uma deleçäo críptica 11p13p14, incluindo a regiäo WAGR e envolvendo aproximadamente 7.5 Mb de DNA, deletando os genes PAX6 e WT1. Estes resultados correlacionam-se com o quadro clínico da paciente e a coloca em alto risco de desenvolver tumor de Wilms. A ausência de retardo mental na paciente indica que a posiçäo distal do ponto de quebra poderá refinar o mapeamento do locus retardo mental na síndrome de genes contíguos WAGR (Wilms, aniridia, anomalias genitais e retardo mental).


Subject(s)
Humans , Female , Infant, Newborn , Infant , Child, Preschool , Aniridia/genetics , In Situ Hybridization, Fluorescence , Chromosome Deletion , WAGR Syndrome/genetics
5.
Rev. bras. oftalmol ; 54(2): 65-8, fev. 1995. ilus
Article in Portuguese | LILACS | ID: lil-148568

ABSTRACT

A aniridia é uma síndrome frequentemente associada a defeitos oculares múltiplos que podem acometer íris, córnea, cristalino, câmara anterior, nervo óptico e retina, além de alteraçöes sistêmicas como Tumor de Wilms, retardo mental, anomalias gênito-urinárias em uma mesma família, onde foram acometidos a mäe, duas filhas e um filho. A herança provável foi autossômica dominante e o estudo do cariótipo mostrou-se normal. O tecido iriano hipolásico foi de difícil visualizaçäo, observado apenas à gonioscopia. Apareceram alteraçöes corneanas como cicatrizes centrais e neovasos periféricos, como um "pannus" em toda a circunferência. Observaram-se grande incdência de catarata e coloboma de cristalino. A hipoplasia de papila ocorreu em todos os casos estudados


Subject(s)
Humans , Male , Female , Child , Adolescent , Adult , Aniridia/pathology , Anterior Chamber/abnormalities , Cornea/abnormalities , Lens, Crystalline/abnormalities , Optic Nerve/abnormalities , Retina/abnormalities , Aniridia/genetics
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