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Related Concept Videos

Mesenchymal Stem Cells01:19

Mesenchymal Stem Cells

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Mesenchymal stem cells (MSCs) are adult stem cells that can differentiate into most connective tissue cell types, except for hematopoietic cells, depending upon the source of MSCs. For example, bone-marrow-derived MSCs (BM-MSCs) can differentiate into osteocytes, hepatocytes, and pancreatic and neuronal cells. MSCs can be isolated from various sources such as bone marrow, placenta, adipose tissue, teeth, and Wharton’s jelly, a gelatinous substance in the umbilical cord. The ease of their...
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Related Experiment Video

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Generation of a Humanized Mouse Liver Using Human Hepatic Stem Cells
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Generation of a Humanized Mouse Liver Using Human Hepatic Stem Cells

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Microencapsulated human mesenchymal stem cells decrease liver fibrosis in mice.

Raphael P H Meier1, Redouan Mahou2, Philippe Morel1

  • 1Cell Isolation and Transplantation Center, Department of Surgery, Geneva University Hospitals and Medical School, Geneva, Switzerland.

Journal of Hepatology
|December 3, 2014
PubMed
Summary
This summary is machine-generated.

Transplanted encapsulated mesenchymal stem cells (MSCs) effectively reduced liver fibrosis in mice. MSC-derived soluble molecules, particularly anti-inflammatory cytokines, were responsible for this protective effect against liver damage.

Keywords:
AlginateCell transplantationInflammationInterleukin 1 receptor antagonistLiver fibrosisMesenchymal stem cellsMiceMicroencapsulation

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Area of Science:

  • Stem Cell Therapy
  • Hepatology
  • Fibrosis Research

Background:

  • Mesenchymal stem cell (MSC) transplantation shows promise for treating liver fibrosis.
  • The precise mechanisms underlying MSCs' therapeutic effects in liver fibrosis remain unclear.

Purpose of the Study:

  • To investigate the mechanisms by which encapsulated human MSCs exert protective effects in mouse models of liver fibrosis.
  • To assess the efficacy of encapsulated MSCs in mitigating liver fibrosis progression.

Main Methods:

  • Human bone marrow-derived MSCs were microencapsulated in alginate-polyethylene glycol microspheres.
  • In vitro analysis of MSC-conditioned medium on hepatic stellate cells and encapsulated MSC function.
  • Assessment of liver fibrosis in mouse models (bile duct ligation and carbon tetrachloride) following transplantation of encapsulated MSCs, fibroblasts, or empty microspheres.

Main Results:

  • MSC-conditioned medium inhibited hepatic stellate cell activation and secreted anti-fibrotic, anti-apoptotic, and anti-inflammatory cytokines (e.g., IL-1Ra).
  • Encapsulated MSCs maintained viability, proliferation, differentiation capacity, and cytokine secretion.
  • Transplantation of encapsulated MSCs significantly delayed liver fibrosis development and reduced collagen type I mRNA levels, while increasing matrix metalloproteinase 9 mRNA.

Conclusions:

  • Soluble molecules secreted by MSCs are the primary mediators of their anti-fibrotic effects in experimental liver fibrosis.
  • Encapsulation maintains MSC function and therapeutic potential for liver fibrosis treatment.