Abstract
Background
Gene data on infiltrative hepatocellular carcinoma (iHCC) are still unknown.
Aims
This study aims to identify the gene expression signature of iHCC compared with single nodular (SN)-type HCC according to the gross classification.
Methods
The whole-exome sequencing was performed in six matched HCC tumor/normal pairs (three infiltrative type and three single nodular type) from six patients who received curative hepatectomy. Subsequent validation using Sanger sequencing and real-time PCR was performed in 30 HCC tumor samples (15 infiltrative type and 15 single nodular type).
Results
Following whole-exome sequencing, Sanger sequencing, and bioinformatics analysis, it revealed significant difference of iHCC from SN-type HCC in gene patterns. Particularly, a typical growth factor receptor tyrosine kinase FGFR3 was predominantly mutated in iHCC. One nonsynonymous variant c.G285T (p.Q95H) and five additional mutations (c.G938A:p.G313D, c.G1291A:p.A431T, c.C1355G:p.T452R, c.C1377T:p.L459L, and c.A1445T:p.E482V) were investigated by whole-exome and Sanger sequencing, respectively. Immunohistochemical studies confirmed the specific expression of FGFR3 in iHCC samples.
Conclusion
Our studies indicated that FGFR3 may be a candidate oncogene in tumor progression and a promising therapeutic target in iHCC patients who had early recurrence.
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Acknowledgments
The authors would like to thank the whole multiple disciplinary team (MDT) for their help in this study. This work was supported by the National Natural Science Foundation of China (Grant No. 81470866).
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10620_2016_4408_MOESM6_ESM.tif
Fig. S1. Mutations identified in iHCC. Somatic mutations confirmed only in iHCC by Sanger sequencing. The black arrows indicate the somatic mutation sites (TIFF 7339 kb)
10620_2016_4408_MOESM7_ESM.tif
Fig. S2. Mutations identified in iHCC. Five additional variants for FGFR3 gene were observed in iHCC samples. The red arrows indicate the mutation sites (TIFF 3259 kb)
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Yan, X., Shao, C., Chen, C. et al. Mutation Detection of Fibroblast Growth Factor Receptor 3 for Infiltrative Hepatocellular Carcinoma by Whole-Exome Sequencing. Dig Dis Sci 62, 407–417 (2017). https://doi.org/10.1007/s10620-016-4408-7
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DOI: https://doi.org/10.1007/s10620-016-4408-7