Hepatocyte cell line derived from the epiblast of pig blastocysts
First Claim
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1. An isolated cell line of normal pluripotent parenchymal hepatocytes derived from a primary culture of pig epiblast cells.
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Abstract
Continuous cultures of pluripotent parenchymal hepatocytes were derived from the epiblasts of pig blastocysts. The cultures are feeder-dependent and grow slowly with doubling times of 3 to 4 days. They differentiate into large secretory duct-like structures or form small canaliculi. Alternatively, the cells accumulate droplets that stain intensely with oil red O, a lipid-specific stain. α-Fetoprotein and albumin mRNA expression increases as the cells differentiate in culture.
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5 Claims
- 1. An isolated cell line of normal pluripotent parenchymal hepatocytes derived from a primary culture of pig epiblast cells.
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3. A method of preparing a cell line from the epiblast of the pig blastocyst, wherein said cell line comprises normal pluripotent parenchymal hepatocytes, said method comprising,
a) removing a blastocyst from the uterus of a pig, b) immunodissecting the inner cell mass from said blastocyst, c) dissecting the epiblast from the inner cell mass and culturing the epiblast for a time sufficient for colony formation, wherein a primary culture is obtained, d) subculturing the epiblast colonies, from step c) to obtain a secondary culture, and e) isolating said hepatocytes from the secondary culture of step d).
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