Autoimmune Retinopathy Complicating TLR7-related Monogenic Interferonopathy

Area of Science:

• Immunology
• Genetics
• Ophthalmology

Background:

• Gain-of-function variants in the Toll-like receptor 7 (TLR7) gene are linked to autoimmune conditions such as systemic lupus erythematosus (SLE)-like disease, neuromyelitis optica, and progressive leukoencephalopathy.
• The p.(Leu528Ile) variant of TLR7 has been identified as a cause for this group of symptoms.

Purpose of the Study:

• To report the extended follow-up of a young female patient with a known TLR7-related interferonopathy.
• To describe the development of non-paraneoplastic autoimmune retinopathy in this patient.
• To expand the understanding of the phenotypic spectrum associated with TLR7 variants.

Main Methods:

• Extended clinical follow-up of a previously described patient.
• Observation of disease progression and development of new autoimmune manifestations.
• Analysis of the clinical course in relation to TLR7 gene variant and immunomodulatory therapy.

Main Results:

• The patient developed non-paraneoplastic autoimmune retinopathy after an unsuccessful attempt to reduce systemic immunomodulatory therapy.
• This new finding expands the known clinical manifestations associated with TLR7 gain-of-function variants.

Conclusions:

• The study highlights a potential association between interferon-driven immune dysregulation in TLR7-related disorders and the development of autoimmune retinal pathology.
• This case broadens the phenotypic spectrum of TLR7-related diseases, emphasizing the need for comprehensive monitoring in affected individuals.