Retroviral gene transfer to the liver in vivo during tri-iodothyronine induced hyperplasia
| Autor: | Selden C, Malcolm R. Alison, Michael Themis, Charles Coutelle, Stuart J. Forbes, Hodgson Hj |
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| Rok vydání: | 1998 |
| Předmět: |
medicine.medical_specialty
medicine.medical_treatment Genetic Vectors Population Gene Expression Biology Viral vector In vivo Internal medicine Genetics medicine Animals Hepatectomy education Molecular Biology Reporter gene education.field_of_study Genetic transfer Gene Transfer Techniques Transfection beta-Galactosidase Molecular biology Liver Regeneration Rats Retroviridae Endocrinology medicine.anatomical_structure Liver Hepatocyte Triiodothyronine Molecular Medicine |
| Zdroj: | Gene Therapy. 5:552-555 |
| ISSN: | 1476-5462 0969-7128 |
| DOI: | 10.1038/sj.gt.3300613 |
| Popis: | The liver is an important target organ for gene therapy but its mitotic quiescence makes it resistant to integrative gene transfer. Retrovirus-based vectors integrate into liver cells in vivo but require the liver to be primed before transduction; experimentally a 70% hepatectomy is commonly used to stimulate regeneration, rendering the liver susceptible to transduction during the resulting wave of cell proliferation. Our aim was to develop a clinically acceptable method of inducing hepatocyte replication before in vivo retroviral gene transfer which is both simple and effective. We have used the physiological hormone tri-iodothyronine (T3) to stimulate hepatocyte replication. A single dose of T3 (400 micrograms/100 g bw) was given subcutaneously to euthyroid rats. This produced a labelling index of 31.7% in the hepatocyte population without histological or biochemical evidence of preceding liver damage. Following T3 administration the rat livers were transfected in vivo with an amphotropic retrovirus, TELCeB/AF-7 which encodes the beta-galactosidase reporter gene together with a nuclear localisation signal. Transgene expression was noted only within the liver where 1.3% of hepatocytes expressed the beta-galactosidase enzyme. This compared to 5.2% of hepatocytes transduced following a 70% hepatectomy, and 0.02% in animals receiving neither T3 nor partial hepatic resection before transduction. T3 administration is a simple way to prime the liver before in vivo retroviral vector-based gene transfer. |
| Databáze: | OpenAIRE |
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