Abstract
Background and Aims
Genetic alterations in specific genes are critical events in carcinogenesis and hepatocellular carcinoma (HCC) progression. However, the genetic alterations responsible for HCC development, progression, and survival are unclear.
Methods
We investigated the essential difference in genetic alterations between HCC and adjacent non-HCC tissues using next-generation sequencing technology.
Results
We found recurrent mutations in several genes such as telomerase reverse transcriptase (TERT; 65 % of the total 104 HCCs), TP53 (38 %), CTNNB1 (30 %), AXIN1 (2 %), PTEN (2 %), and CDKN2A (2 %). TERT promoter mutations were associated with older age (p = 0.005), presence of hepatitis C virus (HCV) infection (p = 0.003), and absence of hepatitis B virus (HBV) infection (p < 0.0001). In hepatitis B surface antigen (HBs Ag)-positive HCC without TERT promoter mutations, HBV integration into TERT locus was found in 47 % patients and was mutually exclusive to TERT promoter mutations. Most (89 %) HBV integrants were in the HBx region. TP53 mutations were associated with HBV infection (p = 0.0001) and absence of HCV infection (p = 0.002). CTNNB1 mutations were associated with absence of HBV infection (p = 0.010). Moreover, TERT promoter mutation was significantly associated with shorter disease-free survival (p = 0.005) and poor overall survival (p = 0.024).
Conclusions
Gene alterations in TERT promoter, TP53, CTNNB1, and HBV integration were closely associated with HCC development, and mutations in TERT promoter are related to poor prognosis. These results are useful for understanding the underlying mechanism of hepatocarcinogenesis, diagnosis, and predicting outcomes of patients with HCC.
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Abbreviations
- HCC:
-
Hepatocellular carcinoma
- TERT :
-
Telomerase reverse transcriptase
- HCV:
-
Hepatitis C virus
- HBV:
-
Hepatitis B virus
- HBsAg:
-
Hepatitis B surface antigen
- PCR:
-
Polymerase chain reaction
- ISPs:
-
Ion sphere particles
- COSMIC:
-
Catalogue of somatic mutations in cancer
- gDNA:
-
Genomic DNA
- CT:
-
Computed tomography
- MRI:
-
Magnetic resonance imaging
- AFP:
-
Alpha-fetoprotein
- DFS:
-
Disease-free survival
- OS:
-
Overall survival
- Anti-HBc:
-
Antibody to hepatitis B core antigen
- Anti-HBs:
-
Antibody to hepatitis B surface antigen
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Dr. Asahina and Dr. Kakinuma belong to a donation-funded department funded by Chugai Pharmaceutical Co. Ltd., Toray Industries Inc., Bristol-Myers Squibb, Dainippon Sumitomo Pharma Co. Ltd., and Merck Sharp & Dohme. The others have nothing to disclose.
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This study was supported by grants from the Japanese Ministry of Education, Culture, Sports, Science, and Technology; the Japanese Ministry of Welfare, Health, and Labor; the Japan Society for the Promotion of Science; and the Japan Health Sciences Foundation.
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Kawai-Kitahata, F., Asahina, Y., Tanaka, S. et al. Comprehensive analyses of mutations and hepatitis B virus integration in hepatocellular carcinoma with clinicopathological features. J Gastroenterol 51, 473–486 (2016). https://doi.org/10.1007/s00535-015-1126-4
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DOI: https://doi.org/10.1007/s00535-015-1126-4