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A Competent Hepatocyte Model Examining Hepatitis B Virus Entry through Sodium Taurocholate Cotransporting Polypeptide as a Therapeutic Target
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A Competent Hepatocyte Model Examining Hepatitis B Virus Entry through Sodium Taurocholate Cotransporting Polypeptide as a Therapeutic Target

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Endothelial progenitor cell mediates transport of hepatitis B

Qi-fei Rong1, Jun Huang, En-ben Su

  • 1Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, China.

Chinese Medical Journal
|February 27, 2008
PubMed

Insights

Endothelial progenitor cells (EPCs) can carry Hepatitis B virus (HBV) into heart tissues, suggesting a new pathway for HBV-associated myocarditis. This research clarifies how the virus spreads to extrahepatic sites.

Area of Science:

  • Virology
  • Cardiology
  • Cell Biology

Background:

  • Hepatitis B virus (HBV) is linked to extrahepatic disorders, but its transmission to organs like the heart and the cause of HBV-associated myocarditis are unclear.
  • Understanding HBV's extrahepatic spread is crucial for managing associated conditions.

Purpose of the Study:

  • To investigate the mechanism of HBV trans-infection into myocardial tissue.
  • To determine if endothelial progenitor cells (EPCs) play a role in HBV-associated myocarditis.

Main Methods:

  • Infection of human cord blood EPCs and human umbilical vein endothelial cells (HUVECs) with HBV in vitro.
  • Transfusion of HBV-infected EPCs into a myocardial infarction mouse model.
  • Detection of HBV antigens, particles, and DNA using immunohistochemistry, flow cytometry, and PCR.
  • Transmission electron microscopy to visualize HBV particles within EPCs.
  • In vivo analysis of EPC and HBV incorporation into injured myocardial tissues.

Main Results:

  • Human cord blood EPCs, unlike HUVECs, were effectively infected by HBV in vitro.
  • HBV antigens and particles were detected in EPCs for up to 11 days and 3 weeks, respectively.
  • HBV DNA, but not cccDNA, persisted in EPCs for at least 3 weeks post-infection.
  • Transplanted HBV-treated EPCs were found in the injured capillaries of the ischemic border zone in rats.

Conclusions:

  • EPCs act as carriers, facilitating HBV trans-infection into injured myocardial tissue.
  • This study proposes a novel mechanism for the development of HBV-associated myocarditis.
Abstract

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