Levels of erythropoietin and vascular endothelial growth factor in surgery-required advanced neovascular glaucoma eyes before and after intravitreal injection of bevacizumab.

Abstract

PURPOSE:

To evaluate changes of levels of erythropoietin (EPO) and VEGF in aqueous humor before and after an intravitreal injection of bevacizumab (IVB) and determine the underlying correlation between them.

METHODS:

This prospective study involved 21 eyes of 21 patients with surgery-required advanced neovascular glaucoma (NVG) and 20 control subjects from October 2011 through November 2012. The NVG eyes received the IVB treatment before antiglaucomatous surgery. Aqueous humor was collected at the time of the IVB injection (pre-IVB) and at the time of antiglaucomatous surgery (post-IVB). Aqueous humor and plasma VEGF and EPO levels were measured with ELISA and chemiluminescence methods, respectively.

RESULTS:

The mean aqueous humor EPO and VEGF concentrations in pre-ivb eyes were significantly higher than those of the control subjects (p 0.001), whereas plasma levels showed no significant difference. There was a statistically significant correlation between the aqueous humor epo and the VEGF concentration (R = 0.612; P = 0.003). The mean aqueous humor VEGF in post-ivb eyes dramatically decreased from 1704.83 757.82 TO 19.02 14.65 PG/ML (P 0.001). However, EPO remained almost the same: 326.60 ± 104.28 compared with 312.67 ± 103.23 mU/mL (P = 0.675).

CONCLUSIONS:

The NVG eyes showed high aqueous EPO and VEGF levels, and there was a positive correlation between them. However, levels of EPO did not change after post-IVB, whereas those of VEGF decreased.

• Authors: Minwen Zhou, Shida Chen, Wei Wang, Wenbin Huang, Bing Cheng, Xiaoyan Ding, Xiulan Zhang
• Journal: Investigative ophthalmology & visual science (Invest Ophthalmol Vis Sci) Vol. 54 Issue 6 Pg. 3874-9 (Jun 04 2013) ISSN: 1552-5783 [Electronic] United States
• PMID: 23674760 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Angiogenesis Inhibitors
• Antibodies, Monoclonal, Humanized
• Vascular Endothelial Growth Factor A
• Erythropoietin
• Bevacizumab

Topics

• Aged
• Angiogenesis Inhibitors (administration & dosage)
• Antibodies, Monoclonal, Humanized (administration & dosage)
• Aqueous Humor (metabolism)
• Bevacizumab
• Case-Control Studies
• Enzyme-Linked Immunosorbent Assay
• Erythropoietin (metabolism)
• Female
• Glaucoma, Neovascular (drug therapy, metabolism)
• Humans
• Intravitreal Injections
• Male
• Middle Aged
• Prospective Studies
• Vascular Endothelial Growth Factor A (metabolism)