Open Access

In vitro and in vivo characteristics of hepatic oval cells modified with human hepatocyte growth factor

  • Zhu Li1Email author,
  • Juan Chen1,
  • Li Li2,
  • Jiang-Hua Ran2,
  • Xue-Hua Li1,
  • Zhi-Heng Liu1,
  • Gui-Jie Liu1,
  • Yan-Chao Gao1,
  • Xue-Li Zhang1 and
  • Hiu-Dong Sun1
Cellular & Molecular Biology LettersAn International Journal201318:104

https://doi.org/10.2478/s11658-013-0104-1

Received: 6 November 2012

Accepted: 29 August 2013

Published: 4 September 2013

Abstract

Hepatocyte growth factor (HGF) is a multifunctional growth factor that controls cell scattering. It has been suggested that it regulates the proliferation of hepatic oval cells (HOCs). Using a HOC line that stably expresses the human HGF gene (hHGF), we investigated the in vitro proliferation and differentiation characteristics of hHGF-modified HOCs and explored their potential capacity for intrahepatic transplantation. A modified 2-acetylaminofluorene and partial hepatectomy (2-AAF/PH) model was established to activate the proliferation of oval cells in the rat liver. HOCs were transfected with the pBLAST2-hHGF plasmid and hHGF-carrying HOCs were selected based on blasticidin resistance. The level of hHGF secretion was determined via ELISA. Cell proliferation was determined using the MTT assay. Differentiation was induced by growth factor withdrawal. A two-cuff technique was used for orthotopic liver transplantation, and HOCs or hHGF-modified HOCs were transplanted into the recipients. The levels of biochemical indicators of liver function were measured after transplantation. An HOC line stably expressing hHGF was established. The transfected line showed greater hHGF secretion than normal HOCs. The hHGF gene promoted the proliferation capability of HOCs by reducing the peak time in vitro. The hHGF-modified HOCs differentiated into hepatocytes and bile duct epithelial cells upon growth factor withdrawal in vitro. In addition, hHGF-modified HOC transplantation significantly prolonged the median survival time (MST) and improved the liver function of recipients compared to HOC transplant recipients and nontransplanted controls. Our results indicate that hHGF-modified HOCs may have valuable properties for therapeutic liver regeneration after orthotopic liver transplantation.

Key words

Hepatic oval cells Hepatocyte growth factor pBLAST2-hHGF Plasmid transfection Proliferation Differentiation Liver transplantation Rats In vitro Liver regeneration

Notes

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