Association between a new 3q; 5q chromosomal translocation and dystrophy of human retinal pigment epithelium
Genet. mol. res. (Online)
; 6(4): 1085-1090, 2007. ilus
Article
em En
| LILACS
| ID: lil-520041
Biblioteca responsável:
BR26.1
ABSTRACT
Retinitis pigmentosa (RP) is a heterogeneous group of inherited retinal degeneration. This group of disorders essentially leads to blindness due to mutations in different genes. The genetic basis affected by sporadic and inherited autosomal dominant, autosomal recessive or X-linked mutations is complex. In humans, RP is in most cases associated with missense mutations in the rhodopsin gene (RHO). RHO plays an important role in phototransduction pathways. So far, few studies have described associations between chromosomal alterations and RP. In this study, we present a case report of a premature, 32-week-old male baby who suffered from retinopathy, facial dysmorphisms and other disorders. His chromosomes were analyzed by conventional and high-resolution chromosomal techniques. This analysis revealed structural aberrations on chromosomes 3 and 5 with an apparently balanced chromosomal translocation with karyotype 46,XY,t(3;5)(q25;q11.2). Remarkably, the 3q breakpoint on the long arm of chromosome 3 is located close to the physical RHO chromosomal gene location. In this study, we describe presumably for the first time a possible association between a 3q;5q chromosomal alteration and RP. We conclude that the new detected chromosomal translocation may lead either to loss or inactivation of the intragenic RHO gene or its respective gene regulatory region. As a consequence, the chromosomal aberration may be responsible for retinitis pigmentosa.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Degeneração Retiniana
/
Translocação Genética
/
Recém-Nascido Prematuro
Tipo de estudo:
Risk_factors_studies
Limite:
Humans
/
Male
/
Newborn
Idioma:
En
Revista:
Genet. mol. res. (Online)
Assunto da revista:
BIOLOGIA MOLECULAR
/
GENETICA
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Brasil