PageRank analysis reveals topologically expressed genes correspond to psoriasis and their functions are associated with apoptosis resistance

Zeng,Xue; Zhao,Jingjing; Wu,Xiaohong; Shi,Hongbo; Liu,Wali; Cui,Bingnan; Yang,Li; Ding,Xu; Song,Ping

doi:10.3892/mmr.2016.4999

PageRank analysis reveals topologically expressed genes correspond to psoriasis and their functions are associated with apoptosis resistance

Authors:
- Xue Zeng
- Jingjing Zhao
- Xiaohong Wu
- Hongbo Shi
- Wali Liu
- Bingnan Cui
- Li Yang
- Xu Ding
- Ping Song
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Affiliations: Department of Dermatology, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 201203, P.R. China, Key Laboratory of Advanced Control and Optimization for Chemical Processes of the Ministry of Education, East China University of Science and Technology, Shanghai 200237, P.R. China, Department of Otorhinolaryngology, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 201203, P.R. China
Published online on: March 18, 2016 https://doi.org/10.3892/mmr.2016.4999
Pages: 3969-3976

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Abstract

Psoriasis is an inflammatory skin disease. Deceleration in keratinocyte apoptosis is the most significant pathological change observed in psoriasis. To detect a meaningful correlation between the genes and gene functions associated with the mechanism underlying psoriasis, 927 differentially expressed genes (DEGs) were identified using the Gene Expression Omnibus database, GSE13355 [false discovery rate (FDR) <0.01; |log fold change >1] with the package in R langue. The selected DEGs were further constructed using the search tool for the retrieval of interacting genes, in order to analyze the interaction network between the DEGs. Subsequent to PageRank analysis, 14 topological hub genes were identified, and the functions and pathways in the hub genes network were analyzed. The top‑ranked hub gene, estrogen receptor‑1 (ESR1) is downregulated in psoriasis, exhibited binding sites enriched with genes possessing anti‑apoptotic functions. The ESR1 gene encodes estrogen receptor α (ERα); a reduced level of ERα expression provides a crucial foundation in response to the anti‑apoptotic activity of psoriatic keratinocytes by activating the expression of anti‑apoptotic genes. Furthermore, it was detected that the pathway that is associated most significantly with psoriasis is the pathways in cancer. Pathways in cancer may protect psoriatic cells from apoptosis by inhibition of ESR1 expression. The present study provides support towards the investigation of ESR1 gene function and elucidates that the interaction with anti‑apoptotic genes is involved in the underlying biological mechanisms of resistance to apoptosis in psoriasis. However, further investigation is required to confirm the present results.

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