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Abstract #84980 Published in IGR 21-1

Proteome alterations in aqueous humour of primary open angle glaucoma patients

Liu H; Anders F; Funke S; Mercieca K; Grus F; Prokosch V
International Journal of Ophthalmology 2020; 13: 176-179

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AIM: To unravel the primary open angle glaucoma (POAG) related proteomic changes in aqueous humour (AH). METHODS: Totally 35 patients listed for cataract surgery (controls: =12, age: 67.4±13.6y) or trabeculectomy for POAG (=23, age: 72.5±8.3y) were included. AH samples of those patients were obtained during cataract surgery or trabeculectomy. AH samples were subsequently pooled into the experimental groups under equal contribution in terms of protein amount of each individual patient. Protein samples were analyzed by a linear trap quadrupol Orbitrap Mass Spectrometry device with an upstream liquid chromatography system. The obtained raw data were analyzed using the Maxquant proteome software and compared. Proteins with a fold-change ratio higher than a cut-off of 2 were considered as noticeably altered. RESULTS: A total number of 175 proteins could be identified out of the AH from POAG and cataract by means of quantitative mass spectrometric analysis. Apolipoprotein D (fold change, 3.16 times), complement C3 (2.96), pigment epithelium-derived factor (2.86), dickkopf-related protein 3 (2.18) and wingless-related integration (Wnt) inhibitory factor 1 (2.35) were significantly upregulated within the AH of glaucoma compared to cataract serving as controls. CONCLUSION: AH provides a tool to analyze changes in glaucoma and shows striking changes in Wnt signaling inhibitory molecules and other proteins.

Full article

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Classification:

2.6.3 Compostion (Part of: 2 Anatomical structures in glaucoma > 2.6 Aqueous humor dynamics)
3.12 Proteomics (Part of: 3 Laboratory methods)

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