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A Network Biology Framework for Exploring Molecular Mechanisms in Cystoid Macular Edema
1Eye Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
Romanian Journal of Ophthalmology
|May 18, 2026
Summary
Cystoid macular edema (CME) involves a complex molecular network of inflammation and angiogenesis. Key proteins like ANGPT2 and TNF drive its pathogenesis, offering potential therapeutic targets.
Area of Science:
- Ophthalmology
- Molecular Biology
- Systems Biology
Background:
- Cystoid macular edema (CME) is a significant cause of vision loss.
- Its underlying molecular mechanisms, particularly involving protein interactions, are not fully understood.
Purpose of the Study:
- To elucidate the molecular mechanisms of CME using protein-protein interaction (PPI) network analysis.
- To identify key regulatory proteins, functional modules, and biological pathways in CME pathogenesis.
Main Methods:
- Compiled a list of 18 CME-associated human proteins from literature.
- Obtained high-confidence PPI data from STRING database.
- Analyzed the PPI network using centrality metrics, Louvain modularity, and functional enrichment analyses (GO, KEGG, Reactome).
Main Results:
- Constructed a PPI network with 91 nodes and 217 edges.
- Identified ANGPT2, FLT1, KDR, TNF, and VEGFA as central hub proteins.
- Discovered eight functional communities and significant enrichment in cytokine signaling, angiogenesis, and inflammatory pathways.
Conclusions:
- CME pathogenesis is driven by a complex molecular network involving inflammation and angiogenesis.
- Key regulatory proteins (e.g., ANGPT2, FLT1, TNF, IL6) are potential therapeutic targets.
- A systems biology approach provides a framework for understanding CME and developing personalized treatments.
Keywords:
AKT1 = AKT Serine/Threonine Kinase 1AKT2 = AKT Serine/Threonine Kinase 2ANGPT2ANGPT2 = Angiopoietin-2AQP4 = Aquaporin 4Apoptosis RegulatorBAX = BCL2 Associated XBCL2 = BCL2 Apoptosis RegulatorCASP3 = Caspase 3CASP9 = Caspase 9CCL2 = C-C Motif Chemokine Ligand 2 (MCP-1)CCL5 = C-C Motif Chemokine Ligand 5 (RANTES)CCR2 = C-C Motif Chemokine Receptor 2CDH5 = Cadherin 5 (VE-Cadherin)CLDN5 = Claudin 5CXCL10 = C-X-C Motif Chemokine Ligand 10CXCL8 = C-X-C Motif Chemokine Ligand 8 (IL-8)CXCL9 = C-X-C Motif Chemokine Ligand 9CYBA = Cytochrome B-245 Alpha ChainEDN1 = Endothelin 1EPO = ErythropoietinERK1 = Extracellular Signal-Regulated Kinase 1 (MAPK3)ERK2 = Extracellular Signal-Regulated Kinase 2 (MAPK1)FGF1 = Fibroblast Growth Factor 1FGF2 = Fibroblast Growth Factor 2FGFR1 = Fibroblast Growth Factor Receptor 1FGFR2 = Fibroblast Growth Factor Receptor 2FLT1 = Fms Related Tyrosine Kinase 1 (VEGFR-1)FOXO1 = Forkhead Box O1HIF1A = Hypoxia Inducible Factor 1 Subunit AlphaHMOX1 = Heme Oxygenase 1ICAM1 = Intercellular Adhesion Molecule 1ICAM2 = Intercellular Adhesion Molecule 2IFNG = Interferon GammaIL10 = Interleukin 10IL10RA = Interleukin 10 Receptor Subunit AlphaIL13 = Interleukin 13IL13RA1 = Interleukin 13 Receptor Subunit Alpha 1IL17A = Interleukin 17AIL18 = Interleukin 18IL1A = Interleukin 1 AlphaIL1B = Interleukin 1 BetaIL4 = Interleukin 4IL4R = Interleukin 4 ReceptorIL6 = Interleukin 6IL6R = Interleukin 6 ReceptorITGAM = Integrin Subunit Alpha MITGB2 = Integrin Subunit Beta 2JAK1 = Janus Kinase 1JAK2 = Janus Kinase 2JAM2 = Junctional Adhesion Molecule 2KDR = Kinase Insert Domain Receptor (VEGFR-2)MAP2K1 = Mitogen-Activated Protein Kinase Kinase 1MAPK1 = Mitogen-Activated Protein Kinase 1 (ERK2)MAPK3 = Mitogen-Activated Protein Kinase 3 (ERK1)MAPK8 = Mitogen-Activated Protein Kinase 8 (JNK1)MMP1 = Matrix Metallopeptidase 1MMP2 = Matrix Metallopeptidase 2MMP3 = Matrix Metallopeptidase 3MMP7 = Matrix Metallopeptidase 7MMP9 = Matrix Metallopeptidase 9MitochondrialNF-κB SubunitNFKB1 = Nuclear Factor Kappa B Subunit 1NFKBIA = NFKB Inhibitor AlphaNOS2 = Nitric Oxide Synthase 2 (Inducible)NOS3 = Nitric Oxide Synthase 3 (Endothelial)NOX4 = NADPH Oxidase 4OCLN = OccludinPDGFB = Platelet-Derived Growth Factor Subunit BPECAM1 = Platelet and Endothelial Cell Adhesion Molecule 1PI3KCA = Phosphatidylinositol-4,5-Bisphosphate 3-Kinase Catalytic Subunit AlphaPLAT = Plasminogen ActivatorPLAU = Plasminogen ActivatorPRKCA = Protein Kinase C AlphaPRKCB = Protein Kinase C BetaPTGS2 = Prostaglandin-Endoperoxide Synthase 2 (COX-2)RAC1 = Rac Family Small GTPase 1RELA = RELA Proto-OncogeneS1PR1 = Sphingosine-1-Phosphate Receptor 1SELE = Selectin ESELP = Selectin PSERPINE1 = Serpin Family E Member 1 (PAI-1)SOCS3 = Suppressor of Cytokine Signaling 3SOD2 = Superoxide Dismutase 2STAT3 = Signal Transducer and Activator of Transcription 3TGFB1 = Transforming Growth Factor Beta 1TGFBR1 = Transforming Growth Factor Beta Receptor 1TGFBR2 = Transforming Growth Factor Beta Receptor 2TIMP1 = TIMP Metallopeptidase Inhibitor 1TIMP2 = TIMP Metallopeptidase Inhibitor 2TNF = Tumor Necrosis FactorTYK2 = Tyrosine Kinase 2Tissue TypeUrokinaseVCAM1 = Vascular Cell Adhesion Molecule 1VEGFAVEGFA = Vascular Endothelial Growth Factor Aangiogenesiscystoid macular edemaenrichment analysisinflammationprotein-protein interaction networksystems biology
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