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Article

Identification and validation of a Hedgehog pathway‑based 3‑gene prognostic signature for gastric cancers

  • Authors:
    • Jianbing Wu
    • Xi Wang
    • Wei Lu
  • View Affiliations / Copyright

    Affiliations: The Criminal Science and Technology Department, Zhejiang Police College, Hangzhou, Zhejiang 310053, P.R. China, Zhejiang Key Laboratory of Gastro‑Intestinal Pathophysiology, Zhejiang Hospital of Traditional Chinese Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310006, P.R. China, Medical Laboratory Center, Zhejiang Hospital of Traditional Chinese Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310006, P.R. China
    Copyright: © Wu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 2263-2270
    |
    Published online on: June 11, 2018
       https://doi.org/10.3892/ol.2018.8945
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Abstract

Developing prognostic factors for patients with gastric cancer (GC) is crucial for the accurate identification of subgroups with distinct clinical outcomes and the development of effective treatment strategies. The aim of this study was to determine novel gene expression signatures from the hedgehog (Hh) signaling pathway as predictors of risk with biological significance. The Cancer Genome Atlas (TCGA) GC (STAD) cohort was used as the training dataset to select for significant prognostic Hh genes. Three Hh genes, indian hedgehog (IHH), patched 1 (PTCH1) and smoothened frizzled class receptor (SMO), were identified to be significant prognostic factors. On this basis, a 3‑Hh‑gene set was constructed and the high‑risk patients of the training cohort were distinguished against low‑risk cases [hazard ratio (HR)=1.73, 95% confidence interval (CI)=1.26‑2.39, P=0.00069]. Then the gene signature was externally validated in a combined dataset from Gene Expression Omnibus (n=631), and experimentally confirmed in an independent cohort of 126 clinical GC samples by immunohistochemistry (IHC). Validation in the combined GEO dataset yielded consistent results (HR=1.45, 95% CI=1.17‑1.81, P=0.00068), and remained significant for stages I‑III, HER2‑positive and surgery alone subgroups. Subsequently, we further demonstrated that this mRNA‑based gene set could be successfully transferred to an IHC‑based signature in our local cohort (HR=2.04, 95% CI=1.09‑3.82, P=0.02). In addition, this signature served as an independent prognostic indicator for overall survival in the multivariate Cox analysis (HR=2.133, 95% CI=1.110‑4.099, P=0.02). In conclusion, we successfully generated a stable III‑Hh‑gene model with the ability to separate patients into prognostic subgroups, which may have notable biological importance and be easily utilized clinically.
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Copy and paste a formatted citation
Spandidos Publications style
Wu J, Wang X and Lu W: Identification and validation of a Hedgehog pathway‑based 3‑gene prognostic signature for gastric cancers. Oncol Lett 16: 2263-2270, 2018.
APA
Wu, J., Wang, X., & Lu, W. (2018). Identification and validation of a Hedgehog pathway‑based 3‑gene prognostic signature for gastric cancers. Oncology Letters, 16, 2263-2270. https://doi.org/10.3892/ol.2018.8945
MLA
Wu, J., Wang, X., Lu, W."Identification and validation of a Hedgehog pathway‑based 3‑gene prognostic signature for gastric cancers". Oncology Letters 16.2 (2018): 2263-2270.
Chicago
Wu, J., Wang, X., Lu, W."Identification and validation of a Hedgehog pathway‑based 3‑gene prognostic signature for gastric cancers". Oncology Letters 16, no. 2 (2018): 2263-2270. https://doi.org/10.3892/ol.2018.8945
Copy and paste a formatted citation
x
Spandidos Publications style
Wu J, Wang X and Lu W: Identification and validation of a Hedgehog pathway‑based 3‑gene prognostic signature for gastric cancers. Oncol Lett 16: 2263-2270, 2018.
APA
Wu, J., Wang, X., & Lu, W. (2018). Identification and validation of a Hedgehog pathway‑based 3‑gene prognostic signature for gastric cancers. Oncology Letters, 16, 2263-2270. https://doi.org/10.3892/ol.2018.8945
MLA
Wu, J., Wang, X., Lu, W."Identification and validation of a Hedgehog pathway‑based 3‑gene prognostic signature for gastric cancers". Oncology Letters 16.2 (2018): 2263-2270.
Chicago
Wu, J., Wang, X., Lu, W."Identification and validation of a Hedgehog pathway‑based 3‑gene prognostic signature for gastric cancers". Oncology Letters 16, no. 2 (2018): 2263-2270. https://doi.org/10.3892/ol.2018.8945
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