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The Extracellular Matrix01:42

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The Extracellular Matrix01:29

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In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.
Composition of the Extracellular Matrix
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Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. This extracellular matrix (ECM) is composed of fibrous proteins like collagen, elastin, and fibronectin in a ground substance consisting of interstitial fluid, cell adhesion proteins, and proteoglycans. The proteoglycans form a gel-like material in the spaces between cells and provide hydration, buffering, binding, and force...
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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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Extracellular matrix remodelling in neurological diseases.

Jessica Chi Fung Kwok1,2, Alexander Dityatev3,4,5

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The neural extracellular matrix (ECM) is vital for brain function and cognitive processes. Targeting ECM remodelling offers a promising therapeutic strategy for various central nervous system (CNS) diseases.

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Area of Science:

  • Neuroscience
  • Biochemistry
  • Cell Biology

Background:

  • The neural extracellular matrix (ECM) comprises proteins and glycans forming structures like perineuronal nets.
  • ECM regulates synaptic stability, plasticity, and network excitability in the central nervous system (CNS).
  • ECM plays a critical role in memory engrams and cognitive flexibility.

Purpose of the Study:

  • To review the role of ECM in CNS diseases.
  • To explore ECM remodelling mechanisms and therapeutic potential.
  • To highlight emerging technologies for ECM research.

Main Methods:

  • Literature review of behavioural studies, preclinical models, and technological advancements.
  • Analysis of ECM's role in various CNS conditions, including trauma, stroke, and chronic disorders.
  • Examination of factors driving ECM remodelling, such as neuronal activity and neuroinflammation.

Main Results:

  • ECM remodelling is a common feature in CNS diseases, with condition-specific patterns.
  • ECM-targeting treatments have demonstrated efficacy in preclinical CNS disease models.
  • Novel biochemical and imaging technologies are advancing ECM research.

Conclusions:

  • The neural ECM is a critical regulator of brain function and cognition.
  • ECM remodelling presents a significant therapeutic target for neurological disorders.
  • Future research utilizing advanced technologies holds promise for novel ECM-based therapies and biomarkers.