Epiretinal membrane proteins and extracellular matrix (ERM/ECM)

Epiretinal membrane (ERM) proteins and the associated extracellular matrix (ECM) constitute a pathological fibrocellular layer that develops on the inner surface of the retina, specifically at the vitreoretinal interface. This structure is primarily composed of structural proteins such as collagen types I, II, IV, and VI, as well as adhesive glycoproteins including laminin, fibronectin, and vitronectin (StatPearls, 2023). These components are synthesized by migrating cells like Müller cells and retinal pigment epithelial cells, which undergo myofibroblastic transformation to create a contractile membrane (PubMed, PMID: 32491457). The resulting mechanical traction on the macula leads to visual distortions, macular edema, and potential vision loss, a condition clinically known as macular pucker (Mayo Clinic, 2023). While surgical vitrectomy with membrane peeling is the standard treatment, pharmacological interventions like enzymatic vitreolysis target the ECM proteins. For instance, the drug ocriplasmin selectively cleaves laminin and fibronectin to facilitate the separation of the vitreous from the retina and dissolve tractional forces (FDA, 2012). Research into the specific proteomic makeup of these membranes continues to inform the development of targeted therapies aimed at preventing fibrosis and improving visual outcomes without invasive surgery.

Other names

Macular pucker proteinsVitreoretinal interface proteinsPremacular fibrosis componentsCellophane maculopathy matrixInner limiting membrane associated proteins

Proteolytic degradation of extracellular matrix components such as laminin, fibronectin, and various collagen types to induce posterior vitreous detachment and dissolve tractional membranes.