Intraocular Concentration of Stem Cell Factor/c-KIT and Galectin-1 in Retinal Diseases

Area of Science:

• Ophthalmology
• Retinal Diseases
• Molecular Biology

Background:

• Intraocular cytokine profiles are crucial for understanding retinal disease pathogenesis.
• Stem cell factor (SCF)/c-KIT, galectin-1 (GAL-1), and vascular endothelial growth factor (VEGF)-A play roles in angiogenesis and ocular inflammation.
• Investigating these factors in various retinal conditions and their response to treatment is essential.

Purpose of the Study:

• To determine the intraocular concentration of SCF/c-KIT, GAL-1, and VEGF-A in patients with retinal diseases.
• To correlate these cytokine levels with disease status and response to anti-VEGF therapy.
• To explore the potential of these cytokines as therapeutic targets.

Main Methods:

• Aqueous humor samples were collected from patients with dry age-related macular degeneration (AMD), neovascular AMD (nAMD), diabetic macular edema (DME), retinal vein occlusion (RVO), and normal controls.
• Immunoassay was used to quantify the levels of SCF, c-KIT, GAL-1, and VEGF-A.
• Statistical analysis was performed to compare levels between disease groups and assess treatment response.

Main Results:

• Significantly elevated levels of SCF, c-KIT, and GAL-1 were found in nAMD, DME, and RVO compared to controls.
• SCF, c-KIT, and GAL-1 levels positively correlated with VEGF-A in nAMD patients.
• Anti-VEGF treatment led to decreased GAL-1 and VEGF-A levels, while SCF and c-KIT remained unchanged. Improved vision in nAMD patients correlated with lower baseline c-KIT, GAL-1, and VEGF-A.

Conclusions:

• Intraocular cytokine levels of SCF, c-KIT, and GAL-1 are elevated in nAMD, DME, and RVO.
• These cytokines exhibit differential responses to anti-VEGF therapy.
• SCF, c-KIT, and GAL-1 represent potential therapeutic targets for retinal diseases due to their association with angiogenesis.