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Pursuing Diabetic Nephropathy through Aqueous Humor Proteomics Analysis
Huan Chen1,2, Tan Wang1,2, Erqian Wang1,2
1Department of Ophthalmology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China.
Oxidative Medicine and Cellular Longevity
|October 10, 2022
Summary
This study identified key aqueous humor proteins linked to diabetic nephropathy (DN) progression. These proteins offer potential biomarkers for early DN diagnosis and understanding disease mechanisms.
Area of Science:
- Ophthalmology
- Nephrology
- Proteomics
Background:
- Diabetic nephropathy (DN) is a severe complication of diabetes, and its underlying molecular mechanisms are not fully understood.
- Aqueous humor (AH) contains proteins that may reflect systemic conditions, including diabetic complications.
Purpose of the Study:
- To identify differentially expressed proteins (DEPs) in the aqueous humor of patients with proliferative diabetic retinopathy (PDR) and DN.
- To explore the functional pathways and protein-protein interactions associated with DN progression.
- To identify potential protein biomarkers for early DN diagnosis.
Main Methods:
- Proteomic analysis using gel electrophoresis-liquid chromatography-tandem mass spectrometry on AH samples from PDR with DN and PDR-only patients.
- Bioinformatic analyses including function enrichment, protein-protein interaction network construction, and Ingenuity Pathway Analysis (IPA).
Main Results:
- Fifty-four DEPs were identified, enriched in functions like cell adhesion, extracellular exosome, complement activation, and coagulation cascades.
- Nine hub genes (NCAM1, PLG, APOH, C3, PSAP, RBP4, CDH2, NUCB1, GNS) were identified, with C3 and PLG implicated in renal and urological abnormalities.
- IPA revealed significant pathways related to disease and biological functions relevant to DN.
Conclusions:
- The identified DEPs and hub proteins provide insights into the molecular mechanisms of DN progression.
- These proteins represent potential novel biomarkers for the early detection and diagnosis of diabetic nephropathy.
- This exploratory proteomic analysis of aqueous humor advances understanding of DN pathogenesis.
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