Frequency of Gene Mutation in Patients with Hereditary Retinal Dystrophy.

OBJECTIVES

Hereditary retinal dystrophies are a rare group of diseases which are heterogeneous in genotype and phenotype and result in total blindness. One of the genetic defects that cause hereditary retinal dystrophy is mutation of the gene. Genetic therapy studies in hereditary retinal dystrophies have increased in number recently, and important developments have been reported in these studies. Voretigene neparvovec-rzyl (Luxturna, Spark Therapeutics), a gene therapy drug for retinal dystrophy associated with mutation, received Food and Drug Administration approval in 2017. This study aimed to investigate the frequency and clinical findings of patients with gene defects, which may be amenable to genetic treatment.

MATERIALS AND METHODS

The data of patients diagnosed with hereditary retinal dystrophy who were followed up between 2017 and 2021 were retrospectively reviewed. Of these, 460 patients with genetic analysis results were included in the study. The clinical findings of patients with homozygous (biallelic) mutation were screened.

RESULTS

homozygous gene mutation was detected in only 11 of 460 cases (2.39%). Genetic results of the cases were presented in detail. The inheritance patterns of the cases were autosomal recessive. The demographic data and clinical findings were defined.

CONCLUSION

gene mutation is a very rare disorder. Genetic screening has gained importance with the emergence of gene therapy alternatives. New treatment methods are promising in cases for which there was no chance of a cure to date.