Current mutation discovery approaches in Retinitis Pigmentosa.

Area of Science:

• Ophthalmology
• Genetics
• Molecular Biology

Background:

• Retinitis Pigmentosa (RP) affects 1 in 3500-5000 individuals globally, causing progressive vision loss.
• It is a genetically heterogeneous condition with autosomal-recessive, autosomal-dominant, and X-linked inheritance patterns, alongside non-Mendelian forms.
• Over 65 genes are linked to RP, yet these explain only 60% of cases, leaving 40% with unknown heritability.

Purpose of the Study:

• To review current state-of-the-art technologies for molecular diagnosis of Retinitis Pigmentosa.
• To discuss the strengths and weaknesses of these technologies in diagnosing this complex genetic disease.
• To highlight the challenges in molecular diagnosis due to RP's genetic heterogeneity.

Main Methods:

• Review of existing literature on Retinitis Pigmentosa genetics and diagnostic technologies.
• Analysis of current sequencing methodologies applicable to molecular diagnosis.
• Assessment of the feasibility of integrating molecular testing into routine clinical practice.

Main Results:

• Significant advancements in sequencing technologies have drastically reduced costs.
• These technologies offer improved capabilities for identifying genetic causes of RP.
• Despite progress, a substantial portion of RP cases remain genetically undiagnosed.

Conclusions:

• Molecular diagnosis of RP is challenged by its genetic heterogeneity and diverse inheritance patterns.
• Emerging sequencing technologies are poised to make molecular testing more accessible in clinical settings.
• Further research is needed to identify the genetic basis for the remaining 40% of RP cases.