Predominance of precore mutations and clinical significance of basal core promoter mutations in chronic hepatitis B virus infection in Indonesia

  • Authors:
    • Juniastuti
    • Takako Utsumi
    • Eduardus Bimo Aksono
    • Yoshihiko Yano
    • Soetjipto
    • Yoshitake Hayashi
    • Hak Hotta
    • Fedik Abdul Rantam
    • Hernomo Ontoseno Kusumobroto
    • Maria Inge Lusida
  • View Affiliations

  • Published online on: May 15, 2013     https://doi.org/10.3892/br.2013.106
  • Pages: 522-528
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Abstract

Chronic hepatitis B virus (HBV) infection is a major health problem worldwide, with a particularly high prevalence in the Asian‑Pacific region. During chronic hepatitis B virus (HBV) infection, mutations commonly occur in the basal core promoter (BCP) and precore (PC) regions of HBV, affecting HBeAg expression, particularly following HBeAg seroconversion. Mutations in the B‑ and T‑cell epitopes of the HBV core have also been observed during disease progression. The clinical significance of HBV genome variability has been demonstrated, however the results are a subject of controversy. Considering the characteristics of the virus associated with geographical location, the profiles of BCP, PC and core mutations and their clinical implications in patients with chronic HBV infection in Surabaya, Indonesia, were investigated. The BCP, PC and core mutations and HBV genotypes were detected by direct sequencing. The HBeAg̸anti‑HBe status and HBV DNA levels were also assessed. This study enrolled 10 patients with chronic HBV infection (UC) from Dr Soetomo General Hospital and Indonesian Red Cross, Surabaya, East Java, Indonesia, 10 patients with chronic hepatitis B and liver cirrhosis (LC) and 4 patients with chronic hepatitis B and hepatocellular carcinoma (HCC) from Dr Soetomo General Hospital. The PC mutation A1896 was predominant in all the groups (60‑100%), together with the PC variant T1858, which was associated with HBV genotype B. The number of detected core mutations (Thr/Ser130) was higher in HCC patients (50%). However, the BCP mutations T1762/A1764 were predominant in LC patients (50‑60%). The LC and HCC patients carried HBV isolates with additional mutations, at least at BCP or PC, mainly following HBeAg seroconversion. In the majority of anti‑HBe‑positive samples, the BCP T1762̸A1764 mutations were associated with a high viral load, regardless of the PC 1896 status. In conclusion, the PC mutations were found to be predominant in all the groups. However, the BCP mutations were mainly detected in the LC group and may be considered as a critical indicator of a poor clinical outcome.
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July-August 2013
Volume 1 Issue 4

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Spandidos Publications style
Juniastuti , Utsumi T, Aksono EB, Yano Y, Soetjipto , Hayashi Y, Hotta H, Rantam FA, Kusumobroto HO, Lusida MI, Lusida MI, et al: Predominance of precore mutations and clinical significance of basal core promoter mutations in chronic hepatitis B virus infection in Indonesia. Biomed Rep 1: 522-528, 2013
APA
Juniastuti, ., Utsumi, T., Aksono, E.B., Yano, Y., Soetjipto, ., Hayashi, Y. ... Lusida, M.I. (2013). Predominance of precore mutations and clinical significance of basal core promoter mutations in chronic hepatitis B virus infection in Indonesia. Biomedical Reports, 1, 522-528. https://doi.org/10.3892/br.2013.106
MLA
Juniastuti, ., Utsumi, T., Aksono, E. B., Yano, Y., Soetjipto, ., Hayashi, Y., Hotta, H., Rantam, F. A., Kusumobroto, H. O., Lusida, M. I."Predominance of precore mutations and clinical significance of basal core promoter mutations in chronic hepatitis B virus infection in Indonesia". Biomedical Reports 1.4 (2013): 522-528.
Chicago
Juniastuti, ., Utsumi, T., Aksono, E. B., Yano, Y., Soetjipto, ., Hayashi, Y., Hotta, H., Rantam, F. A., Kusumobroto, H. O., Lusida, M. I."Predominance of precore mutations and clinical significance of basal core promoter mutations in chronic hepatitis B virus infection in Indonesia". Biomedical Reports 1, no. 4 (2013): 522-528. https://doi.org/10.3892/br.2013.106