
We aimed to monitor the intraocular proangiogenic and profibrotic cytokine profiles within 7 days after intravitreous injection of conbercept (IVC) for patients with proliferative diabetic retinopathy (PDR). We observed a remarkable and rapid decrease in intraocular VEGF A, temporal decrease in PIGF from day 2 to day 4, increase in VEGF C and VEGF D from day 2 onwards, but no profibrotic switch in PDR eyes after IVC. Ideal vitrectomy timing might be around 3 days after IVC.
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