Telomere shortening and telomerase reactivation in dysplastic nodules of human hepatocarcinogenesis

Bong Kyeong Oh, Kwang Jo Chae, Chanil Park, Kyungsik Kim, Woo Jung Lee, Kwang Hyub Han, Young Nyun Park

Research output: Contribution to journalArticlepeer-review

60 Citations (Scopus)


Backgrounds/Aims: The maintenance of telomere with telomerase reactivation, vital for carcinogenesis, was studied in human multistep hepatocarcinogenesis for the characterization of borderline lesions. Methods: The terminal restriction fragment length (TRFL) and telomerase activity (TA) were examined in 3 chronic hepatitis (CH), 10 cirrhosis, 7 large regenerative nodules (LRNs), 30 low grade dysplastic nodules (LGDNs), 6 high grade DNs (HGDNs), 3 DNs with hepatocellular carcinoma (HCC) foci, 11 HCCs, and 4 normal livers by Southern hybridization and TRAPeze Elisa telomerase detection. Results: The TRFL and TA showed significant differences between the LGDNs and HGDNs. Most LGDNs had similar levels of TRFL and TA to those of the CH, cirrhosis and LRNs, however, 17% of LGDNs revealed shortening of telomeres up to the levels of HGDNs and 7% of LGDNs showed high levels of TA. The levels of TRFL and TA in HGDNs showed no significant differences from those of DNs with HCC foci and HCCs. Conclusions: The shortening of telomeres and reactivation of telomerase occur in the DNs during the early stages of hepatocarcinogenesis, with a significant change in the transition of LGDNs to HGDNs. The characteristics of HGDNs are considered to be closer to those of HCCs.

Original languageEnglish
Pages (from-to)786-792
Number of pages7
JournalJournal of Hepatology
Issue number5
Publication statusPublished - 2003 Nov

Bibliographical note

Funding Information:
This study was supported by the Korean Research Foundation Grant (KRF-2002-015-EP0052).

All Science Journal Classification (ASJC) codes

  • Hepatology


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