Immune Cell Infiltration into the Eye Is Controlled by IL-10 in Recoverin-Induced Autoimmune Retinopathy

Area of Science:

• Ophthalmology
• Immunology
• Autoimmune Diseases

Background:

• Autoimmune retinopathy (AIR) causes progressive vision loss.
• AIR is linked to an immune imbalance involving T helper 1 (T_H1) and regulatory T cells targeting the retinal protein recoverin.

Purpose of the Study:

• To establish a novel murine model for studying AIR immunopathology.
• To investigate the role of T cell responses to recoverin in AIR pathogenesis.

Main Methods:

• Immunization of C57BL/6 mice with recoverin.
• Utilizing IL-10 knockout (KO) mice to assess disease kinetics and severity.
• Employing an immunodominant recoverin peptide (AG-16) and adoptive cell transfer.

Main Results:

• Recoverin immunization induced ocular inflammation with immune cell infiltration.
• IL-10 KO mice showed exacerbated inflammation and accelerated disease.
• Adoptive transfer of recoverin-specific T cells induced AIR, while B cell deficiency resulted in milder disease.

Conclusions:

• T cell responses to recoverin are critical drivers of AIR.
• IL-10 plays a significant protective role in preventing AIR development.