Genetic Causes of Stargardt Disease and Retinitis Pigmentosa in a Spanish Family
Author Information
Author(s): Rosa Riveiro-Alvarez, Elena Vallespin, Robert Wilke, Blanca Garcia-Sandoval, Diego Cantalapiedra, Jana Aguirre-Lamban, Almudena Avila-Fernandez, Ascension Gimenez, Maria-Jose Trujillo-Tiebas, Carmen Ayuso
Primary Institution: Fundacion Jimenez Diaz-CIBERER; Madrid, Spain
Hypothesis
What are the genetic causes for Stargardt disease and early-onset autosomal recessive retinitis pigmentosa in one family?
Conclusion
Two distinct retinal dystrophies with mutations affecting two different genes were found in one family.
Supporting Evidence
- The STGD patient was homozygous for the p.Asn1805Asp mutation in ABCA4.
- The affected sister had two mutations in the CRB1 gene.
- Haplotype analyses confirmed the segregation of disease-associated alleles in the family.
Takeaway
This study looked at a family with two different eye diseases and found that each disease was caused by mutations in different genes.
Methodology
Mutational analyses were performed using genotyping microarrays and confirmed by direct sequencing.
Limitations
The study focused on one family, which may limit the generalizability of the findings.
Participant Demographics
Spanish family with two affected siblings.
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