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Int J Mol Sci ; 25(11)2024 Jun 03.
Artículo en Inglés | MEDLINE | ID: mdl-38892339

RESUMEN

Leber congenital amaurosis (LCA)/early-onset severe retinal dystrophy (EOSRD) stand as primary causes of incurable childhood blindness. This study investigates the clinical and molecular architecture of syndromic and non-syndromic LCA/EOSRD within a Chilean cohort (67 patients/60 families). Leveraging panel sequencing, 95.5% detection was achieved, revealing 17 genes and 126 variants (32 unique). CRB1, LCA5, and RDH12 dominated (71.9%), with CRB1 being the most prevalent (43.8%). Notably, four unique variants (LCA5 p.Glu415*, CRB1 p.Ser1049Aspfs*40 and p.Cys948Tyr, RDH12 p.Leu99Ile) constituted 62.7% of all disease alleles, indicating their importance for targeted analysis in Chilean patients. This study underscores a high degree of inbreeding in Chilean families affected by pediatric retinal blindness, resulting in a limited mutation repertoire. Furthermore, it complements and reinforces earlier reports, indicating the involvement of ADAM9 and RP1 as uncommon causes of LCA/EOSRD. These data hold significant value for patient and family counseling, pharmaceutical industry endeavors in personalized medicine, and future enrolment in gene therapy-based treatments, particularly with ongoing trials (LCA5) or advancing preclinical developments (CRB1 and RDH12).


Asunto(s)
Mutación , Distrofias Retinianas , Humanos , Distrofias Retinianas/genética , Distrofias Retinianas/terapia , Distrofias Retinianas/diagnóstico , Chile/epidemiología , Masculino , Femenino , Niño , Preescolar , Oxidorreductasas de Alcohol/genética , Proteínas de la Membrana/genética , Proteínas del Ojo/genética , Amaurosis Congénita de Leber/genética , Amaurosis Congénita de Leber/terapia , Amaurosis Congénita de Leber/diagnóstico , Linaje , Proteínas del Tejido Nervioso/genética , Adolescente , Alelos , Variación Genética , Enfermedades Hereditarias del Ojo
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