Ocular Phenotyping of Knockout Mice Identifies Genes Associated With Late Adult Retinal Phenotypes

Area of Science:

• Genetics
• Ophthalmology
• Molecular Biology

Background:

• Adult-onset retinal diseases, including inherited retinal diseases (IRDs) and age-related macular degeneration (AMD), pose significant challenges.
• Identifying novel genetic contributors is crucial for understanding disease mechanisms and developing therapies.

Purpose of the Study:

• To analyze phenotypic data from knockout mice exhibiting late-adult retinal pathologies.
• To identify novel genes associated with the development of adult-onset retinal diseases.

Main Methods:

• Queried the International Mouse Phenotyping Consortium (IMPC) database for late-adult knockout mice with abnormal retinal phenotypes.
• Identified human orthologs and performed protein-protein and biological pathway analyses using STRING, PLAE, PANTHER, and KEGG.
• Compared candidate genes with known IRD and AMD genes.

Main Results:

• Screened 587 genes, identifying 12 with abnormal late-adult retinal phenotypes (20 human orthologs).
• Only a few candidate genes showed relationships with known IRD/AMD genes, suggesting novel functions.
• Eight of the 12 mouse genes have no prior implication in retinal physiology or pathology.

Conclusions:

• Identified 12 mouse genes linked to significant late-adult abnormal retinal pathology.
• Eight of these genes represent novel candidates for late-onset retinal diseases.
• This research provides a foundation for further investigation into novel retinal disease mechanisms.