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PLoS One. 2015 May 1;10(5):e0125369. doi: 10.1371/journal.pone.0125369. eCollection 2015.

A weighted polygenic risk score using 14 known susceptibility variants to estimate risk and age onset of psoriasis in Han Chinese.

Author information

  • 1Institute of Dermatology, Department of Dermatology, The First Affiliated Hospital, Anhui Medical University, Hefei, Anhui Province, China; Key lab of Dermatology, Ministry of Education, State Key Lab of Dermatology Incubation Center, Anhui Medical University, Hefei, Anhui Province, China; Key Lab of Gene Resource Utilization for Complex Diseases, Hefei, Anhui Province, China; Collaborative Innovation Center for Complex and Severe Dermatosis, Anhui Medical University, Hefei, Anhui Province, China; The Scripps Translational Science Institute, La Jolla, California, United States of America; Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, California, United States of America; Human Biology, J. Craig Venter Institute, La Jolla, California, United States of America.
  • 2Institute of Dermatology, Department of Dermatology, The First Affiliated Hospital, Anhui Medical University, Hefei, Anhui Province, China; Key lab of Dermatology, Ministry of Education, State Key Lab of Dermatology Incubation Center, Anhui Medical University, Hefei, Anhui Province, China; Key Lab of Gene Resource Utilization for Complex Diseases, Hefei, Anhui Province, China; Collaborative Innovation Center for Complex and Severe Dermatosis, Anhui Medical University, Hefei, Anhui Province, China.
  • 3Scripps Health, La Jolla, California, United States of America; The Scripps Translational Science Institute, La Jolla, California, United States of America.
  • 4Human Biology, J. Craig Venter Institute, La Jolla, California, United States of America.

Abstract

With numbers of common variants identified mainly through genome-wide association studies (GWASs), there is great interest in incorporating the findings into screening individuals at high risk of psoriasis. The purpose of this study is to establish genetic prediction models and evaluate its discriminatory ability in psoriasis in Han Chinese population. We built the genetic prediction models through weighted polygenic risk score (PRS) using 14 susceptibility variants in 8,819 samples. We found the risk of psoriasis among individuals in the top quartile of PRS was significantly larger than those in the lowest quartile of PRS (OR = 28.20, P < 2.0×10(-16)). We also observed statistically significant associations between the PRS, family history and early age onset of psoriasis. We also built a predictive model with all 14 known susceptibility variants and alcohol consumption, which achieved an area under the curve statistic of ~ 0.88. Our study suggests that 14 psoriasis known susceptibility loci have the discriminating potential, as is also associated with family history and age of onset. This is the genetic predictive model in psoriasis with the largest accuracy to date.

PMID:
25933357
PMCID:
PMC4416725
DOI:
10.1371/journal.pone.0125369
[PubMed - indexed for MEDLINE]
Free PMC Article
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