Clarifying the role of ATOH7 in glaucoma endophenotypes

Area of Science:

• Ophthalmology
• Genetics
• Optic Nerve Research

Background:

• The ATOH7 gene is linked to glaucoma and optic disc characteristics.
• Optic disc size and cup-to-disc ratio (CDR) are relevant glaucoma phenotypes.
• The precise relationship between optic disc size and glaucoma requires further elucidation.

Purpose of the Study:

• To determine if ATOH7 is independently associated with CDR.
• To investigate the relationship between ATOH7 and optic disc size.
• To differentiate the effects of ATOH7 on CDR versus optic disc size.

Main Methods:

• Association analysis of the ATOH7 gene region in two distinct populations (Blue Mountains Eye Study and TwinsUK cohort).
• Linear regression models were used to analyze disc size and CDR, adjusting for age, sex, and intraocular pressure (IOP).
• A specific single nucleotide polymorphism (SNP), rs7916697, was examined for its association with disc size and CDR under various adjustment models.

Main Results:

• A significant association was detected between the SNP rs7916697 and optic disc size.
• This SNP was also associated with CDR when adjusted for age, sex, and IOP.
• The association between rs7916697 and CDR was not significant when disc size was included as a covariate.

Conclusions:

• The ATOH7 gene is associated with optic disc size.
• The association of ATOH7 with CDR is likely mediated through its effect on optic disc size.
• ATOH7 does not appear to have an independent effect on CDR beyond its influence on disc size.