Aqueous Humor Angiotensin-Converting Enzyme and TGF-β1 Levels in Proliferative Vitreoretinopathy: A Prospective...

Area of Science:

• Ophthalmology
• Biochemistry

Background:

• Proliferative vitreoretinopathy (PVR) is a severe complication of rhegmatogenous retinal detachment (RRD).
• Understanding the molecular mechanisms underlying PVR is crucial for developing targeted therapies.

Purpose of the Study:

• To investigate plasma and aqueous humor levels of angiotensin-converting enzyme (ACE) and transforming growth factor-β1 (TGFβ1) in patients with PVR secondary to RRD.
• To determine the association of these biomarkers with the presence and severity of PVR.

Main Methods:

• Eighty-eight patients were categorized into three groups: RRD with PVR, RRD without PVR, and healthy controls.
• Plasma and aqueous humor samples were analyzed for ACE and TGFβ1 concentrations using ELISA.
• Statistical analyses, including regression and ROC analyses, were performed to assess biomarker associations with PVR.

Main Results:

• Aqueous TGFβ1 levels were significantly elevated in the PVR group compared to non-PVR and control groups.
• Aqueous ACE levels were higher in both RRD groups (PVR and non-PVR) than in controls, but did not differ between RRD groups.
• Aqueous TGFβ1 showed high discriminative performance for PVR, and was identified as an independent predictor, along with symptom duration.

Conclusions:

• Aqueous TGFβ1 is a significant biomarker associated with PVR in RRD.
• Elevated aqueous ACE levels appear to be a consequence of RRD rather than a specific indicator of PVR.
• These findings highlight the potential role of TGFβ1 as a therapeutic target for PVR.