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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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Neuroplasticity and dysfunction after gastrointestinal inflammation.

Stuart M Brierley1, David R Linden2

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Nature Reviews. Gastroenterology & Hepatology
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Summary
This summary is machine-generated.

Gastrointestinal disorders like IBS and IBD involve neuroplasticity, which are changes in nerve function. Understanding these nervous system alterations is key to developing effective treatments for gut disorders.

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Area of Science:

  • Neurogastroenterology
  • Gastrointestinal Physiology
  • Neuroscience

Background:

  • The gastrointestinal (GI) tract has intrinsic and extrinsic neuronal innervation controlling its functions.
  • Gastrointestinal disorders, including Inflammatory Bowel Disease (IBD) and Irritable Bowel Syndrome (IBS), cause debilitating symptoms like altered motility, discomfort, and pain.
  • Infection and inflammation are increasingly recognized as risk factors for GI disorders, with a notable link between gut infections and IBS symptom development.

Purpose of the Study:

  • This review discusses the evidence for neuroplasticity in the GI tract.
  • It highlights the role of neuroplasticity in the development and persistence of GI disorders.
  • The aim is to emphasize the importance of understanding neuroplasticity for therapeutic development.

Main Methods:

  • Review of preclinical and clinical evidence.
  • Analysis of studies investigating neuroplasticity in the context of GI inflammation and disorders.
  • Synthesis of findings on structural, synaptic, and intrinsic neuronal changes.

Main Results:

  • Neuroplasticity, involving changes in neuronal structure and function, occurs during GI inflammation.
  • These neural changes often persist after tissue healing, indicating a failure of the nervous system to return to normal.
  • Altered neuroplasticity in specific neuronal populations contributes to abnormal motility, secretion, and sensation in common GI disorders.

Conclusions:

  • Neuroplasticity plays a fundamental role in the pathophysiology of IBD and IBS.
  • Understanding the extent and timeline of neuroplasticity is crucial for developing targeted therapies for GI disorders.
  • Further research into neuroplasticity mechanisms is needed to improve patient outcomes.