Integrative analyses reveal biological pathways and key genes in psoriasis

Area of Science:

• Dermatology
• Genomics
• Immunology

Background:

• Psoriasis involves genetic and environmental factors, with abnormal gene expression in affected skin.
• Previous research lacked genome-scale gene expression data for psoriatic lesions in the Chinese population.
• Systematic investigation of biological pathways, pathogenicity, and gene interaction networks in psoriasis is needed.

Purpose of the Study:

• To explore psoriasis-associated pathways through functional analysis.
• To identify key genes contributing to psoriasis pathogenesis via gene pathogenicity analysis.

Main Methods:

• RNA sequencing of 60 psoriatic lesions and healthy controls to identify differentially expressed genes.
• Integrative analysis of gene expression profiling, pathway analysis, gene pathogenicities, and protein-protein interaction networks.
• Retrieval of all reported psoriasis-associated genes for comprehensive analysis.

Main Results:

• Internal and external stimuli may trigger immune responses contributing to psoriasis development.
• Functional and pathway analyses revealed associations with infectious diseases and cancer pathways.
• Gene pathogenicity analysis identified five key genes: PPARD, GATA3, TIMP3, WNT5A, and PTTG1.

Conclusions:

• Genes contribute to psoriasis pathogenesis by activating risk pathways with abnormal expression.
• Five potentially pathogenic genes identified may serve as crucial biomarkers for psoriasis diagnosis and treatment.