An international study led by the University of Oulu and Oulu University Hospital has identified six genetic regions associated with the inflammation of the eye’s iris, also known as anterior uveitis. The research also uncovered a genetic correlation between anterior uveitis and inflammatory bowel diseases (IBD). These findings contribute to a better understanding of the mechanisms behind anterior uveitis and its connection to common autoimmune diseases.

Each year, approximately 600 Finns are diagnosed with anterior uveitis. This is an intraocular inflammation that can occur at any age but is most common in individuals aged 20–50. Anterior uveitis is known to be associated with several autoimmune diseases, and certain tissue types may also predispose individuals to it. However, the precise mechanisms underlying the disease remain largely unknown, and the root cause often remains unclear.

The aim of the study was to investigate the genetic background of anterior uveitis, a field in which knowledge has been limited. This extensive international collaboration utilized biobank data from Finland, Estonia, and the United Kingdom, enabling comparisons between more than 12,000 patients with anterior uveitis and nearly 1 million controls.