JNK1 activation predicts the prognostic outcome of the human hepatocellular carcinoma
Qingshan Chang1, Jianguo Chen, Kevin J Beezhold
1Graduate Center for Toxicology, University of Kentucky, Lexington, KY40536, USA. qchan2@email.uky.edu
Insights
Hepatocellular carcinoma (HCC) with high JNK1 activation may originate from hepatic progenitor cells, showing poor prognosis and metastasis. JNK1 activation status could serve as a novel biomarker for HCC.
Area of Science:
- Oncology
- Molecular Biology
- Hepatology
Background:
- Hepatocellular carcinoma (HCC) is a prevalent cancer with a poor prognosis.
- Current molecular classification of HCC is not well-established.
Purpose of the Study:
- To identify HCC molecular signatures based on JNK1 activation status.
- To explore the potential of JNK1 as a prognostic biomarker in HCC.
Main Methods:
- Gene expression profiling of 31 HCC specimens and matched noncancerous liver tissue.
- Sub-grouping HCC based on high JNK1 (H-JNK1) and low JNK1 (L-JNK1) activation.
- Analysis of signature genes, biomarker expression, and survival data.
Main Results:
- Two distinct gene sets identified for H-JNK1 and L-JNK1 HCC.
- H-JNK1 HCC showed overlap with hepatoblastoma signatures and over-expressed hepatic progenitor cell biomarkers (AFP, KRT19, etc.).
- H-JNK1 HCC exhibited genes associated with metastasis and recurrence, with down-regulated normal liver function genes and impaired patient survival.
Conclusions:
- H-JNK1 HCC may arise from hepatic progenitor cells, correlating with a poorer prognosis.
- JNK1 activation status in HCC tissue represents a potential new biomarker for prognosis.
- JNK1 status may offer a target for novel HCC therapeutic strategies.
Background:
Hepatocellular carcinoma (HCC) is one of the most common cancers worldwide with an extremely poor prognosis. The classification of HCC based on the molecular signature is not well-established.
Results:
In the present study, we reported HCC signature genes based on the JNK1 activation status in 31 HCC specimens relative to the matched distal noncancerous liver tissue from 31 patients. The HCCs with high JNK1 (H-JNK1) and low JNK1 (L-JNK1) were sub-grouped. Two different signature gene sets for both H-JNK1 and L-JNK1 HCC were identified through gene expression profiling. A striking overlap of signature genes was observed between the H-JNK1 HCC and the hepatoblastoma or hepatoblastoma-type HCC. Many established biomarkers for hepatic progenitor cells were over-expressed in H-JNK1 HCC, including AFP, TACSTD1, KRT19, KRT7, THY1, and PROM1. In addition, the majority of the most up-regulated genes were those associated with metastasis and earlier recurrence, whereas the genes for normal liver function were substantially down-regulated in H-JNK1 HCC tissue. A Kaplan-Meier plot demonstrated that the survival of the patients with H-JNK1 HCC was severely impaired.
Conclusion:
Accordingly, we believe that the H-JNK1 HCC may originate from hepatic progenitor cells and is associated with poorer prognosis. The status of JNK1 activation in HCC tissue, thus, might be a new biomarker for HCC prognosis and therapeutic targeting.
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