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Retrovirus vector-mediated gene transfer into hepatocytes.
1Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla 92093.
Molecular Biology & Medicine
|April 1, 1989
Summary
Foreign gene transfer into hepatocytes is possible using retrovirus vectors, but only during a specific window when cells de-differentiate and replicate in primary culture. This enables stable gene expression for several weeks.
Area of Science:
- Hepatocyte biology
- Gene therapy
- Retroviral vectors
Background:
- Mammalian hepatocytes can express foreign genes through various physical and biological methods.
- Retrovirus-mediated gene transfer is effective for in vitro mammalian cell studies.
Purpose of the Study:
- To define conditions for efficient foreign gene transduction into hepatocytes in vitro.
- To investigate the susceptibility of hepatocytes to retroviral infection.
Main Methods:
- Infection of primary rat liver hepatocyte cultures with retrovirus vectors.
- Monitoring gene expression stability over several weeks.
Main Results:
- Fully differentiated hepatocytes are resistant to retroviruses due to their non-replicative state (G0).
- Primary hepatocyte cultures de-differentiate and replicate, becoming susceptible to retroviral infection during a specific early period.
- Stable foreign gene expression is maintained for several weeks post-infection.
Conclusions:
- Hepatocyte susceptibility to retroviral vectors is linked to cellular replication during a de-differentiated state in primary culture.
- This transient susceptibility allows for effective in vitro gene transfer and stable expression.