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Stem cell therapy is a method used in regenerative medicine to repair and restore function to damaged tissues and organs. Stem cells have the potential to proliferate and differentiate into various tissue types, making them ideal candidates for tissue regeneration. For example, hematopoietic stem cell transplants are commonly used in blood cancer treatment to replenish damaged bone marrow and restore healthy blood cells.
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After cellular or tissue damage, the resident stem cells present in the human body can locally repair and regenerate the damaged tissue or organ. However, even though some tissues do not have stem cells, they can repair and regenerate with the help of pre-existing cells. For example, beta cells of the pancreas and hepatocytes of the liver can divide to renew and regenerate the tissue. Here, both cell division and cell death are well regulated by homeostasis.
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The stem cell niche is the dynamic microenvironment where stem cells reside. Inside these niches, the cells may remain undifferentiated, undergo high self-renewal, or become lineage-specific progenitors. Stem cells coexist with other niche cells, such as stromal cells. They also interact closely with the ECM. Cell-cell and cell-matrix communication occur via adhesion molecules or soluble factors that signal the stem cells and determine their fate. Stromal cells also provide survival signals to...
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The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.
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Regeneration and repair processes are critical in healing damages caused by injury, disease, and aging. In regeneration, the damaged tissue is entirely replaced with new growth that restores the original architecture and function. In contrast, tissue repair usually results in a fixed tissue architecture involving scar formation. Scars generally do not reestablish tissue function and may also exhibit structural abnormalities at the injury site.
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Updated: May 1, 2026

Author Spotlight: Advancing Tissue Regeneration and Disease Modeling with Dental Pulp Stem Cells
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Pulp stem cells: implication in reparative dentin formation.

Sasha Dimitrova-Nakov1, Anne Baudry1, Yassine Harichane1

  • 1INSERM UMR-S 747, Equipe 5: Cellules souches, Signalisation et Prions, Paris, France; Université Paris Descartes, Sorbonne, Paris, France; and Biomédicale des Saint Pères, Paris, France.

Journal of Endodontics
|April 5, 2014
PubMed
Summary
This summary is machine-generated.

Dental pulp stem cells, derived from mouse embryos, can regenerate dentin. These cells show promise for future pulp repair therapies and can be delivered via alginate beads.

Keywords:
Cell nichesdentin repairosteodentinpulp stem cellspulpoblasts

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Area of Science:

  • Dentistry
  • Stem Cell Biology
  • Regenerative Medicine

Background:

  • Dental pulp stem cells are neural crest derivatives crucial for tooth maintenance and repair.
  • The identity and regenerative mechanisms of pulp progenitors are not fully understood.
  • Understanding these cells is key to developing effective pulp therapies.

Purpose of the Study:

  • To investigate the potential of a mouse embryonic molar pulp stem cell line (A4) to induce reparative dentin formation in vivo.
  • To assess the suitability of alginate beads as a carrier for these stem cells.

Main Methods:

  • Surgical exposure of rodent incisor and maxillary molar pulp.
  • Implantation of A4 multipotent stem cells into the pulp cavity.
  • Observation of dentin formation one month post-implantation.
  • Evaluation of A4 cells encapsulated in alginate beads.

Main Results:

  • Pulp injury alone resulted in a nonmineralized fibrous matrix.
  • A4 cell implantation led to the formation of mineralized osteodentin at the site.
  • The surrounding pulp tissue remained structurally intact and vital.
  • Alginate beads effectively delivered A4 progenitors, facilitating reparative dentin formation.

Conclusions:

  • Dental pulp stem cells possess the capacity to induce reparative dentin formation in vivo.
  • A4 cells are a viable tool for potential pulp regeneration therapies.
  • Alginate is a suitable biomaterial for the delivery of dental pulp stem cells in dental applications.