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Journal ArticleDOI

Bone marrow as a potential source of hepatic oval cells.

TLDR
A stem cell associated with the bone marrow has epithelial cell lineage capability and a proportion of the regenerated hepatic cells were shown to be donor-derived.
Abstract
Bone marrow stem cells develop into hematopoietic and mesenchymal lineages but have not been known to participate in production of hepatocytes, biliary cells, or oval cells during liver regeneration. Cross-sex or cross-strain bone marrow and whole liver transplantation were used to trace the origin of the repopulating liver cells. Transplanted rats were treated with 2-acetylaminofluorene, to block hepatocyte proliferation, and then hepatic injury, to induce oval cell proliferation. Markers for Y chromosome, dipeptidyl peptidase IV enzyme, and L21-6 antigen were used to identify liver cells of bone marrow origin. From these cells, a proportion of the regenerated hepatic cells were shown to be donor-derived. Thus, a stem cell associated with the bone marrow has epithelial cell lineage capability.

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Citations
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Journal ArticleDOI

Progenitor cells of the biliary epithelial cell lineage

TL;DR: The close association of ductular reactive cells and neovessels in end-stage cholestatic liver diseases and the relation to Jagged/Notch signalling pathway may be important in the regulation of stem cells to form both biliary epithelial and endothelial cells.
Journal ArticleDOI

Plasticity of Human Stem Cells in the Fetal Sheep Model of Human Stem Cell Transplantation

TL;DR: The advantages of the permissive aspects of the developing preimmune fetus in the early gestational age that led us to develop the sheep as a large-animal model of human stem cell plasticity are described.
Journal ArticleDOI

Stem cells from umbilical cord Wharton's jelly from preterm birth have neuroglial differentiation potential

TL;DR: Undifferentiated WJ-MSCs from preterm birth express neuroglial markers and can be successfully induced into neural progenitors similar to term controls, and their potential use as cellular graft in neuroregenerative therapy for peripartum brain injury in pre term birth has to be tested.
Journal ArticleDOI

Mesenchymal Stem Cells: Future Source for Reparative Medicine

TL;DR: Animal and human trials studying the role of MSCs in cardiomyogenesis and vasculogenesis in postinfarct myocardium are reviewed, factors that stimulate MSC differentiation, routes of M SC delivery, and methods of detecting MSC engraftment are reviewed.
Journal ArticleDOI

Downregulation of β2-microglobulin in human cord blood somatic stem cells after transplantation into livers of SCID-mice: an escape mechanism of stem cells?

TL;DR: It is shown that human cord blood somatic stem cells survive and are reprogrammed after transplantation into mouse livers, although a complete transdifferentiation to hepatocytes did not occur within 7 days, since some marker genes were still negative.
References
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Journal ArticleDOI

Muscle Regeneration by Bone Marrow-Derived Myogenic Progenitors

TL;DR: Transplantation of genetically marked bone marrow into immunodeficient mice revealed that marrow-derived cells migrate into areas of induced muscle degeneration, undergo myogenic differentiation, and participate in the regeneration of the damaged fibers.
Journal Article

In vivo differentiation of rat liver oval cells into hepatocytes.

TL;DR: The data indicate that oval cells can differentiate to hepatocytes and may have an important physiological function as a source of major serum proteins when hepatocytes are unable to synthesize these proteins.
Journal ArticleDOI

Presence of hematopoietic stem cells in the adult liver

TL;DR: The data obtained from the mouse study strongly suggest that hematopoietic stem cells residing in the donor liver are responsible for mixed chimerism and maintenance of tolerance after liver transplantation.
Journal Article

Expression of stem cell factor and its receptor, c-kit, during liver regeneration from putative stem cells in adult rat.

TL;DR: The SCF/c-kit system may, possibly in combination with other growth factor/receptor systems, be involved in the early activation of the hepatic stem cells as well as in the expansion and differentiation of oval cells.
Journal ArticleDOI

Variable chimerism, graft-versus-host disease, and tolerance after different kinds of cell and whole organ transplantation from Lewis to brown Norway rats.

TL;DR: Both the GVHD propensity and tolerogenicity in these experiments were closely associated with recipient tissue chimerism 30 and 100 days after the experiments began, and these observations provide guidelines that should be considered in devising leukocyte augmentation protocols for human whole organ recipients.
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