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Current Proteomics


ISSN (Print): 1570-1646
ISSN (Online): 1875-6247

Research Article

Proteomic Analysis of the Vitreous Body in Proliferative and Non-Proliferative Diabetic Retinopathy

Author(s): Van-An Duong, Jeeyun Ahn, Na-Young Han, Jong-Moon Park, Jeong-Hun Mok, Tae Wan Kim* and Hookeun Lee*

Volume 18, Issue 2, 2021

Published on: 02 March, 2020

Page: [143 - 152] Pages: 10

DOI: 10.2174/1570164617666200302101442

Price: $65


Background: Diabetic Retinopathy (DR), one of the major microvascular complications commonly occurring in diabetic patients, can be classified into Proliferative Diabetic Retinopathy (PDR) and Non-Proliferative Diabetic Retinopathy (NPDR). Currently, available therapies are only targeted for later stages of the disease in which some pathologic changes may be irreversible. Thus, there is a need to develop new treatment options for earlier stages of DR through revealing pathological mechanisms of PDR and NPDR.

Objective: The purpose of this study was to characterize the proteomes of diabetes through quantitative analysis of PDR and NPDR.

Methods: Vitreous body was collected from three groups: control (non-diabetes mellitus), NPDR, and PDR. Vitreous proteins were digested to peptide mixtures and analyzed using LC-MS/MS. MaxQuant was used to search against the database and statistical analyses were performed using Perseus. Gene ontology analysis, related-disease identification, and protein-protein interaction were performed using the differential expressed proteins.

Results: Twenty proteins were identified as critical in PDR and NPDR. The NPDR group showed different expressions of kininogen-1, serotransferrin, ribonuclease pancreatic, osteopontin, keratin type II cytoskeletal 2 epidermal, and transthyretin. Also, prothrombin, signal transducer and activator of transcription 4, hemoglobin subunit alpha, beta, and delta were particularly up-regulated proteins for PDR group. The up-regulated proteins related to complement and coagulate cascades. Statherin was down-regulated in PDR and NPDR compared with the control group. Transthyretin was the unique protein that increased its abundance in NPDR compared with the PDR and control group.

Conclusion: This study confirmed the different expressions of some proteins in PDR and NPDR. Additionally, we revealed uniquely expressed proteins of PDR and NPDR, which would be differential biomarkers: prothrombin, alpha-2-HS-glycoprotein, hemoglobin subunit alpha, beta, and transthyretin.

Keywords: Non-proliferative diabetic retinopathy, proliferative diabetic retinopathy, vitreous body, proteomics, LC-MS/MS, gene ontology.

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