Abstract
BackgroundPsoriasis is a chronic, prolonged, and recurrent skin inflammatory disease. However, the pathogenesis of psoriasis is not completely clear, thus we aimed to explore potential molecular basis of it.MethodsTwo datasets were downloaded from the Gene Expression Omnibus database. After identifying the differentially expressed genes of psoriasis skin lesion samples and healthy controls, three kinds of analyses, namely functional annotation, protein-protein interaction (PPI) network, and immune infiltration analyses, were performed.ResultsA total of 152 up-regulated genes and 38 down-regulated genes were selected for subsequent analyses. Evaluation of the PPI network identified the most important module containing 13 hub genes. Gene ontology analysis showed that the hub genes have a significant enrichment effect on positive regulation of cell migration, defense response to the other organism and epithelial cell differentiation. KEGG signaling pathway analysis showed that the hub genes were significantly enriched in chemokine signaling, Toll-like receptor signaling pathway, and IL-17 signaling pathway. Compared with the normal control sample, naive B cells, CD8+ T cells, activated memory CD4+ T cells, follicular helper T cells, gamma delta T cells, resting NK cells, monocytes, M0 macrophages, M1 macrophages, activated dendritic cells and neutrophils infiltrated more, while memory B cells, naive CD4+ T cells, regulatory T cells (Tregs), activated NK cells, resting mast cells, and eosinophils infiltrated less.ConclusionTo conclude, the hub genes and pathways identified from psoriasis lesions and normal controls along with the immune infiltration profile may provide new insights into the study of psoriasis.
Highlights
Psoriasis is a chronic, prolonged, and recurrent skin inflammatory disease
After the raw data is processed by R software, a total of 190 differentially expressed genes (DEGs), consisting of 152 up-regulated genes and 38 down-regulated genes was identified between LS from psoriasis patients and normal skin (NS) from healthy individuals (Figure 1A)
These results indicate that immune response and inflammatory response play an indispensable role in the pathogenesis of psoriasis
Summary
The World Health Organization (WHO) reported in 2017 that the estimates of the prevalence of psoriasis in adults ranged from 0.51 to 11.43%, and children from 0 to 1.37% (Michalek et al, 2017). There are greater than 6 million patients with psoriasis in China, seriously endangering the physical and mental health of the people. The pathogenesis of psoriasis is not entirely clear. To effectively control the clinical symptoms of psoriasis. It is in urgent need of revealing the molecular mechanism of its occurrence and development. Psoriasis is a chronic, prolonged, and recurrent skin inflammatory disease. The pathogenesis of psoriasis is not completely clear, we aimed to explore potential molecular basis of it
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