Oxidative Stress and Inflammatory Cytokines in Vitreous and Subsilicone Fluids in Patients with Rhegmatogenous...

Area of Science:

• Ophthalmology
• Biochemistry

Background:

• Rhegmatogenous retinal detachment (RRD) is a serious condition requiring surgical intervention.
• Silicone oil is often used as an intraocular tamponade agent after RRD repair.
• The role of oxidative stress in the vitreous and subsilicone fluid in RRD is not fully understood.

Purpose of the Study:

• To investigate and compare oxidative stress (OS) and inflammatory cytokine (IC) levels in the vitreous humor and subsilicone fluid (SSF) of patients with RRD.
• To explore the potential role of OS in silicone oil-induced retinal damage.

Main Methods:

• A prospective study involving 21 patients with uncomplicated RRD.
• Measurement of total antioxidant status (TAS) and total oxidant status (TOS) using an automatic method.
• Quantification of IC levels (e.g., IL-1β) via ELISA.
• Ophthalmological examinations, OCT, and enhanced depth imaging-OCT were performed during follow-up.

Main Results:

• Significantly higher TOS and oxidative stress index (OSI) were found in SSF compared to vitreous humor (p < 0.05).
• Interleukin-1 beta (IL-1β) levels were significantly elevated in the vitreous fluid (p = 0.004).
• A negative correlation was observed between TOS, OSI, and changes in central macular thickness (CMT).

Conclusions:

• Oxidative stress, previously uninvestigated in SSF, is significantly elevated in RRD cases.
• These findings suggest that OS may play a role in initiating retinal damage associated with silicone oil tamponade.
• Further research is warranted to elucidate the mechanisms of OS in RRD and its impact on retinal health.