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Hepatic epithelial stem-like cells

¹Department of Pathology, University of North Carolina at Chapel Hill 27599, USA.

Verhandlungen Der Deutschen Gesellschaft Fur Pathologie

|January 1, 1995

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The liver has stem-like cells capable of differentiating into hepatocytes and biliary cells. These cells, found in cultured hepatic epithelial lines, show potential for liver regeneration and repair.

Area of Science:

Hepatology
Stem Cell Biology
Regenerative Medicine

Background:

The liver typically renews hepatocytes and biliary cells via proliferation of existing differentiated cells, without apparent need for stem cells.
Small epithelial cells, distinct from mature liver cells, can be isolated from normal and diseased livers.
These isolated cells can be cultured into cell lines.

Purpose of the Study:

To investigate the potential of isolated hepatic epithelial cells to differentiate into functional liver cells.
To explore the role of the liver microenvironment in directing cell differentiation and controlling tumorigenicity.

Main Methods:

Isolation and culture of small epithelial cells from rat livers.
Transplantation of cultured hepatic epithelial cells into syngeneic rat livers.

Related Experiment Videos

Transplantation of neoplastic hepatic epithelial cells into subcutaneous sites.

Assessment of cell differentiation, migration, and tumorigenicity in vivo.

Main Results:

Transplanted hepatic epithelial cells migrated into hepatic plates and differentiated into hepatocytes within the liver.
The liver microenvironment induced hepatocytic differentiation even in aneuploid, neoplastic cells.
Neoplastic cells exhibited suppressed tumorigenicity when transplanted intrahepatically compared to subcutaneous sites.

Conclusions:

The liver contains cells with stem-like potential capable of differentiating into both hepatocytes and biliary epithelial cells.
The liver microenvironment possesses a potent capacity to induce differentiation and suppress tumor formation.
These findings suggest a potential source of cells for liver regeneration and therapy.