國家衛生研究院 NHRI:Item 3990099045/12768

NHRI > National Institute of Environmental Health Sciences > Chun-Wei Tung > Periodical Articles > Item 3990099045/12768

Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/12768

Title:	Identification of time-invariant biomarkers for non-genotoxic hepatocarcinogen assessment
Authors:	Huang, SH;Lin, YC;Tung, CW
Contributors:	National Institute of Environmental Health Sciences
Abstract:	Non-genotoxic hepatocarcinogens (NGHCs) can only be confirmed by 2-year rodent studies. Toxicogenomics (TGx) approaches using gene expression profiles from short-term animal studies could enable early assessment of NGHCs. However, high variance in the modulation of the genes had been noted among exposure styles and datasets. Expanding from our previous strategy in identifying consensus biomarkers in multiple experiments, we aimed to identify time-invariant biomarkers for NGHCs in short-term exposure styles and validate their applicability to long-term exposure styles. In this study, nine time-invariant biomarkers, namely A2m, Akr7a3, Aqp7, Ca3, Cdc2a, Cdkn3, Cyp2c11, Ntf3, and Sds, were identified from four large-scale microarray datasets. Machine learning techniques were subsequently employed to assess the prediction performance of the biomarkers. The biomarker set along with the Random Forest models gave the highest median area under the receiver operating characteristic curve (AUC) of 0.824 and a low interquartile range (IQR) variance of 0.036 based on a leave-one-out cross-validation. The application of the models to the external validation datasets achieved high AUC values of greater than or equal to 0.857. Enrichment analysis of the biomarkers inferred the involvement of chronic inflammatory diseases such as liver cirrhosis, fibrosis, and hepatocellular carcinoma in NGHCs. The time-invariant biomarkers provided a robust alternative for NGHC prediction.
Date:	2020-06-16
Relation:	International Journal of Environmental Research and Public Health. 2020 Jun 16;17(12):Article number 4298.
Link to:	http://dx.doi.org/10.3390/ijerph17124298
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000549578300001
Cited Times(Scopus):	https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85086753917
Appears in Collections:	[Chun-Wei Tung] Periodical Articles

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