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In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...
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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.
Types of Stem Cells used in Stem Cell Therapy
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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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Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for...
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Regeneration is the process of restoring injured or lost tissues, organs, or body parts. While simpler organisms generally show greater ability to regenerate their whole body, few complex animals show similarly exceptional regeneration. For example, planarian flatworms have a unique regenerative potential making them a popular study organism among biologists to understand the mechanisms of whole body regeneration. Other organisms, such as hydra, also show extreme regeneration potential;...
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Stem cells are undifferentiated cells with extensive self-renewal properties that help them maintain their population during the fetal and adult stages of life. They can specialize in all cell types of the human body. However, their differential potential may vary and can be classified into five types. Stem cells can be (1) Totipotent, (2) Pluripotent, (3) Multipotent, (4) Oligopotent, and (5) Unipotent. Each stem cell has a specific origin; the fertilized egg or zygote is a totipotent cell and...
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Related Experiment Video

Updated: May 5, 2026

Isolation of Neural Stem/Progenitor Cells from the Periventricular Region of the Adult Rat and Human Spinal Cord
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Cell sources for nucleus pulposus regeneration.

Nevenka Kregar Velikonja1, Jill Urban, Mirjam Fröhlich

  • 1Educell Ltd., Prevale 9, Trzin, Slovenia, nevenka.kregar@educell.si.

European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society
|December 4, 2013
PubMed
Summary
This summary is machine-generated.

Cell therapies show promise for degenerative disc disease, but challenges remain in translating research into clinical practice. Further evidence is needed to confirm the long-term efficacy of various cell sources for intervertebral disc regeneration.

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Area of Science:

  • Biomedical Engineering
  • Regenerative Medicine
  • Orthopedics

Background:

  • Degenerative disc disease (DDD) is a significant clinical challenge.
  • Cell therapy is a promising approach for regenerating nucleus pulposus (NP) tissue.
  • The intervertebral disc (IVD) microenvironment poses challenges for implanted cells.

Purpose of the Study:

  • To discuss parameters for translating IVD cell therapies into clinical use.
  • To evaluate cell sources for NP regeneration.
  • To address challenges in cell culture and regulatory requirements.

Main Methods:

  • Review of proposed cell sources (NP cells, chondrocytes, mesenchymal stem cells).
  • Analysis of clinical trial data and reports on autologous and allogenic cell use.
  • Discussion of IVD microenvironment influence, cell culture, and regulatory aspects.

Main Results:

  • Several cell sources are proposed for NP regeneration.
  • Clinical trials show no immediate safety concerns but require more efficacy data.
  • No single cell source currently demonstrates superior advantages.

Conclusions:

  • Successful translation requires addressing the IVD microenvironment's impact on cell phenotype.
  • Cell culture techniques and product preparation are critical.
  • Current regulatory requirements must be met for clinical application.