Tissue Remodeling in Ocular Mucous Membrane Pemphigoid

Area of Science:

• Ophthalmology
• Fibrosis Research
• Cell Biology

Background:

• Ocular mucous membrane pemphigoid (OcMMP) is a chronic inflammatory eye condition leading to progressive scarring and fibrosis.
• Current immunomodulating therapies are often insufficient to halt the worsening fibrotic process in OcMMP.
• The role of the conjunctival epithelium in modulating fibrosis in OcMMP remains to be fully elucidated.

Purpose of the Study:

• To investigate the fibrotic process in patients with Ocular mucous membrane pemphigoid (OcMMP).
• To determine the role of the conjunctival epithelium in modulating local fibrosis in OcMMP.
• To identify potential biomarkers for early diagnosis and prognosis of OcMMP.

Main Methods:

• A prospective, observational pilot study comparing OcMMP patients with healthy controls.
• Clinical assessment of ocular surface and functional markers.
• Conjunctival biopsy and impression cytology to quantify inflammatory and fibrogenic transcripts (e.g., α-SMA, TGF-β, I-CAM1, IL-10, IL-17).

Main Results:

• Ocular surface markers worsened with fibrotic progression in OcMMP patients.
• Advanced OcMMP showed increased tissue remodeling and profibrotic markers (α-SMA, TGF-β) alongside decreased inflammatory markers (I-CAM1, IL-10, IL-17).
• Conjunctival epithelial cells exhibited increased expression of profibrotic markers and histological changes consistent with transdifferentiation.

Conclusions:

• Chronic OcMMP features a self-sustaining fibrotic process exacerbating disease.
• Conjunctival epithelial cells can transdifferentiate into myofibroblast-like cells under chronic inflammation.
• Tissue remodeling markers, obtainable via non-invasive impression cytology, show promise as diagnostic, prognostic, and therapeutic biomarkers for OcMMP.