Stem cells and neurological diseases

David C Hess, C. V. Borlongan

Research output: Contribution to journalArticle

173 Citations (Scopus)

Abstract

Cells of the central nervous system were once thought to be incapable of regeneration. This dogma has been challenged in the last decade with studies showing new, migrating stem cells in the brain in many rodent injury models and findings of new neurones in the human hippocampus in adults. Moreover, there are reports of bone marrow-derived cells developing neuronal and vascular phenotypes and aiding in repair of injured brain. These findings have fuelled excitement and interest in regenerative medicine for neurological diseases, arguably the most difficult diseases to treat. There are numerous proposed regenerative approaches to neurological diseases. These include cell therapy approaches in which cells are delivered intracerebrally or are infused by an intravenous or intra-arterial route; stem cell mobilization approaches in which endogenous stem and progenitor cells are mobilized by cytokines such as granulocyte colony stimulatory factor (GCSF) or chemokines such as SDF-1; trophic and growth factor support, such as delivering brain-derived neurotrophic factor (BDNF) or glial-derived neurotrophic factor (GDNF) into the brain to support injured neurones; these approaches may be used together to maximize recovery. While initially, it was thought that cell therapy might work by a 'cell replacement' mechanism, a large body of evidence is emerging that cell therapy works by providing trophic or 'chaperone' support to the injured tissue and brain. Angiogenesis and neurogenesis are coupled in the brain. Increasing angiogenesis with adult stem cell approaches in rodent models of stroke leads to preservation of neurones and improved functional outcome. A number of stem and progenitor cell types has been proposed as therapy for neurological disease ranging from neural stem cells to bone marrow derived stem cells to embryonic stem cells. Any cell therapy approach to neurological disease will have to be scalable and easily commercialized if it will have the necessary impact on public health. Currently, bone marrow-derived cell populations such as the marrow stromal cell, multipotential progenitor cells, umbilical cord stem cells and neural stem cells meet these criteria the best. Of great clinical significance, initial evidence suggests these cell types may be delivered by an allogeneic approach, so strict tissue matching may not be necessary. The most immediate impact on patients will be achieved by making use of the trophic support capability of cell therapy and not by a cell replacement mechanism.

Original languageEnglish (US)
Pages (from-to)94-114
Number of pages21
JournalCell Proliferation
Volume41
Issue numberS1
DOIs
StatePublished - Feb 1 2008

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Stem Cells
Cell- and Tissue-Based Therapy
Neural Stem Cells
Brain-Derived Neurotrophic Factor
Brain
Neurons
Bone Marrow Cells
Rodentia
Bone Marrow
Hematopoietic Stem Cell Mobilization
Adult Stem Cells
Regenerative Medicine
Umbilical Cord
Neurogenesis
Embryonic Stem Cells
Stromal Cells
Chemokines
Granulocytes
Neuroglia
Blood Vessels

ASJC Scopus subject areas

  • Cell Biology

Cite this

Stem cells and neurological diseases. / Hess, David C; Borlongan, C. V.

In: Cell Proliferation, Vol. 41, No. S1, 01.02.2008, p. 94-114.

Research output: Contribution to journalArticle

Hess, David C ; Borlongan, C. V. / Stem cells and neurological diseases. In: Cell Proliferation. 2008 ; Vol. 41, No. S1. pp. 94-114.
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