Expression profiling in glaucomatous human lamina cribrosa cells based on graph-clustering approach

Area of Science:

• Ophthalmology
• Genetics
• Cell Biology

Background:

• Primary open angle glaucoma (POAG) is characterized by elevated intraocular pressure, leading to extracellular matrix remodeling and astrocyte activation.
• Lamina cribrosa (LC) cells are implicated in POAG progression due to their role in ocular pressure regulation and tissue integrity.

Purpose of the Study:

• To comprehensively explore gene expression profiles in lamina cribrosa (LC) cells of primary open angle glaucoma (POAG) patients.
• To identify differentially expressed genes (DEGs) and their potential roles in POAG pathogenesis.

Main Methods:

• Utilized Gene Expression Omnibus (GEO) microarray dataset GSE13534 for POAG and control LC cells.
• Screened DEGs using t-test and false discovery rate (<0.05), followed by graph-clustering for gene set grouping.
• Performed Gene Ontology and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis to investigate molecular mechanisms.

Main Results:

• Identified 57 DEGs with 478 co-expression relationships.
• Highlighted cytochrome P450 family 1 subfamily B (CYP1B1), brain-derived neurotrophic factor (BDNF), and myelin basic protein (MBP) as high-degree interacting genes.
• Suggested roles for CYP1B1 in POAG genetics, BDNF in neuroprotection, and MBP, VCAN, ITGA4, CDH2 in extracellular matrix remodeling.

Conclusions:

• Identified specific genes (CYP1B1, BDNF, MBP, VCAN, ITGA4, CDH2) potentially involved in the pathogenesis of POAG.
• Indicated that these genes may play crucial roles in extracellular matrix remodeling and cellular responses within the lamina cribrosa.