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BMC Ophthalmology
Published in: BMC Ophthalmology 1/2017

Open Access 01-12-2017 | Research article

Link between neurodegeneration and trabecular meshwork injury in glaucomatous patients

Authors: Yong Zhang, Qinmei Yang, Feng Guo, Xia Chen, Lin Xie

Published in: BMC Ophthalmology | Issue 1/2017

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Abstract

Background

Glaucoma is classified as a neurodegenerative disease. However, the biomarkers of neurodegeneration in the aqueous humour of primary open angle glaucoma (POAG) eyes have not been quantitatively examined yet. In this study, levels of neurodegeneration-related cytokines in the aqueous humour of POAG eyes were measured and compared with those of non-glaucoma (senile cataract) control eyes.

Methods

This cross-sectional study included 24 patients (24 eyes) with POAG and 22 patients (22 eyes) with cataract. Aqueous humour samples were collected before the commencement of phacoemulsification surgery. The concentrations of brain-derived neurotrophic factor (BDNF), cathepsin D, myeloperoxidase (MPO), soluble intercellular adhesion molecule-1 (sICAM-1), soluble neural cell adhesion molecule (sNCAM), soluble vascular cell adhesion molecule-1 (sVCAM-1), and plasminogen activator inhibitor-1 (PAI-1) were measured using the Luminex suspension array technique. The clinical characteristics of the patients were also obtained for correlation analysis.

Results

Compared with the cataract group, the levels of cathepsin D (P < 0.001), sNCAM (P < 0.001) and sVCAM-1 (P = 0.007) were significantly higher in the aqueous humour samples from POAG. The levels of BDNF, sICAM-1, MPO and PAI-1 did not differ among the groups. Mean deviation (MD) values measured by the Humphrey Visual Field Analyzer were significantly associated with levels of cathepsin D (P < 0.001; ρ= − 0.668), sICAM-1 (P = 0.003; ρ= − 0.579), sVCAM-1(P < 0.001; ρ= − 0.695), and PAI-1 (P = 0.007; ρ= − 0.533). The cytokines showed a positive correlation among each other (P < 0.0083).

Conclusion

These data suggest that POAG patients had elevated levels of multiple biomarkers of neurodegeneration in the aqueous humour, and these elevated biomarkers may be related to trabecular meshwork injury.

Trial registration

This study was registered in the Chinese Clinical Trial Registry (ChiCTR-OOC-16008516) on May 22, 2016.
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Metadata
Title
Link between neurodegeneration and trabecular meshwork injury in glaucomatous patients
Authors
Yong Zhang
Qinmei Yang
Feng Guo
Xia Chen
Lin Xie
Publication date
01-12-2017
Publisher
BioMed Central
Published in
BMC Ophthalmology / Issue 1/2017
Electronic ISSN: 1471-2415
DOI
https://doi.org/10.1186/s12886-017-0623-z

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