Genetically Predicted Immunocyte Phenotypes as Risk and Protective Factors in Glaucoma: An Exploratory Bidirectional...

Area of Science:

• Immunology
• Ophthalmology
• Genetics

Background:

• Glaucoma involves retinal ganglion cell loss and sight damage, with links to immune system dysregulation.
• Primary open-angle glaucoma (POAG) and primary angle-closure glaucoma (PACG) are common glaucoma subtypes.
• Understanding immune system interactions is crucial for glaucoma pathogenesis.

Purpose of the Study:

• To investigate causal relationships between glaucoma subtypes (POAG, PACG) and immunocyte phenotypes.
• To explore the associations between the immune system and glaucoma development.
• To identify specific immune cell types involved in glaucoma.

Main Methods:

• A two-sample Mendelian randomization (MR) approach was employed.
• Genetic variants associated with 731 immunocyte phenotypes were analyzed.
• Data were sourced from genome-wide association studies and the FinnGen consortium.

Main Results:

• Significant associations were found between immunocyte phenotypes and glaucoma.
• 22 immunocyte phenotypes showed causal effects on POAG, including activated T cells.
• 30 immunocyte phenotypes were linked to PACG, with bidirectional interactions involving BAFF-R and CD62L.

Conclusions:

• Immune regulation plays a critical role in glaucoma pathogenesis.
• Findings support exploring immunocyte-targeted therapies for POAG and PACG.
• Immune-glaucoma interactions mediated by T-cell and monocyte phenotypes are highlighted.