Mesenchymal stromal cells as supportive cells for hepatocytes

Area of Science:

• Hepatology
• Stem Cell Biology
• Immunology

Background:

• Hepatocytes and hematopoietic stem cells (HSCs) share survival and functional requirements, potentially due to shared fetal development locations.
• Both cell types require stromal cell support for survival and function, with bone marrow-derived mesenchymal stromal cells (MSCs) identified as crucial supporters.
• Mechanisms supporting HSCs are better understood than those for hepatocytes, yet shared factors are emerging.

Purpose of the Study:

• To explore the potential of mesenchymal stromal cells (MSCs) in supporting hepatocyte survival, proliferation, and function.
• To investigate whether techniques for HSC maintenance and expansion could be adapted for hepatocyte culture.
• To examine the immunomodulatory properties of MSCs in the context of liver biology, including stellate cell activation.

Main Methods:

• Review of existing literature on hepatocyte and HSC support by stromal cells.
• Analysis of data suggesting shared molecular requirements between HSCs and hepatocytes.
• Consideration of the properties of bone marrow-derived MSCs, including their culture expansion, immunoregulatory effects, and immunogenicity.

Main Results:

• MSCs support the proliferation and functionality of both HSCs and hepatocytes in vitro.
• Evidence suggests that factors crucial for HSC maintenance may also preserve the hepatocyte phenotype.
• MSCs are easily cultured, expanded, and possess immunomodulatory and low immunogenic properties.

Conclusions:

• Hepatocyte culture and expansion may benefit from techniques developed for HSCs.
• Allogeneic MSCs show promise for supporting hepatocyte growth and proliferation.
• MSCs may serve as a therapeutic tool for modulating immune responses in the liver, such as stellate cell activation.