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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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Ischemic Stroke ll: Pathophysiology01:15

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An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...
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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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Brain repair: cell therapy in stroke.

Dheeraj Kalladka1, Keith W Muir1

  • 1Institute of Neuroscience and Psychology, University of Glasgow, Southern General Hospital, Glasgow, United Kingdom.

Stem Cells and Cloning : Advances and Applications
|March 15, 2014
PubMed
Summary
This summary is machine-generated.

Cell therapy shows promise for stroke recovery by enhancing brain repair mechanisms. Ongoing research aims to optimize stem cell treatments and identify biomarkers for improved patient outcomes.

Keywords:
cell therapycerebrovascular diseaseneurological diseasestroke

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Area of Science:

  • Neuroscience
  • Regenerative Medicine
  • Clinical Neurology

Background:

  • Stroke is a leading cause of adult disability worldwide, with limited spontaneous recovery.
  • Mechanisms of late stroke recovery and the role of endogenous neurogenesis are not fully understood.
  • Exogenous cell therapy offers potential for augmenting brain repair after stroke.

Purpose of the Study:

  • To review the potential of cell therapy for stroke repair.
  • To discuss the mechanisms of action for stem cells in animal stroke models.
  • To highlight challenges and future directions in clinical translation of cell therapies for stroke.

Main Methods:

  • Review of preclinical studies in animal stroke models.
  • Analysis of stem cell types, including mesenchymal stem cells (MSCs) and neural stem cells (NSCs).
  • Examination of evidence for cell migration, differentiation, immunomodulation, and trophic factor secretion.

Main Results:

  • Animal models show MSCs and NSCs improve functional recovery; MSCs reduce infarct volume acutely.
  • Cell therapies demonstrate potential for enhanced angiogenesis and neurogenesis.
  • Challenges include heterogeneity in study designs, publication bias, and understanding mechanisms.

Conclusions:

  • Cell therapy, particularly using MSCs and NSCs, is a promising avenue for stroke recovery.
  • Further research is needed to clarify mechanisms, optimize cell sources (autologous vs. allogeneic), and improve patient selection.
  • Clinical trials are ongoing, with emerging safety data and a focus on identifying prognostic imaging markers and recovery biomarkers.