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Related Concept Videos

Autophagy01:27

Autophagy

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Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
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Delivery Pathways to the Lysosome01:36

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Eukaryotic cells use different mechanisms to eliminate toxic waste obsolete and worn-out substances. Lysosomes play a pivotal role in this, and hence, these substances are carried to the lysosome from other parts of the cell and extracellular space through different pathways. The most elaborately studied pathways to the lysosome are the endocytic pathways.
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Autophagic Cell Death01:18

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Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
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Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
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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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Autophagy in Neuronal Development and Plasticity.

Angeleen Fleming1, David C Rubinsztein2

  • 1Department of Medical Genetics, University of Cambridge, Cambridge Institute for Medical Research, The Keith Peters Building, Cambridge Biomedical Campus, Hills Road, Cambridge CB2 0XY, UK; Department of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge CB2 3DY, UK; UK Dementia Research Institute, University of Cambridge, Cambridge Institute for Medical Research, The Keith Peters Building, Cambridge Biomedical Campus, Hills Road, Cambridge CB2 0XY, UK.

Trends in Neurosciences
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PubMed
Summary
This summary is machine-generated.

Autophagy, a cellular recycling process, is crucial for neuronal health beyond clearing damaged proteins. This review explores its vital roles in maintaining neural stem cells and adult neuroplasticity, linking deficits to human disorders.

Keywords:
autophagymemoryneurogenesisneuronal stem cell (NSC)plasticitypsychiatric disease

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Area of Science:

  • Cellular Biology
  • Neuroscience
  • Molecular Biology

Background:

  • Autophagy is a conserved cellular process for degrading cytoplasmic components via lysosomes.
  • In neurons, autophagy removes damaged organelles and misfolded proteins, a key focus in neurodegenerative disease research.
  • The role of autophagy in broader neuronal physiology, including stem cell maintenance and plasticity, is less understood.

Purpose of the Study:

  • To review the literature on the function of autophagy in maintaining adult neural stem cells.
  • To explore the role of autophagy in adult neuroplasticity.
  • To discuss the contribution of autophagy dysfunction to structural and functional deficits in human disorders.

Main Methods:

  • Literature review of scientific articles on autophagy, neural stem cells, and neuroplasticity.
  • Synthesis of findings on the mechanisms and implications of autophagy in neuronal physiology.
  • Discussion of the link between autophagy deficits and human neurological conditions.

Main Results:

  • Autophagy plays a critical role in the self-renewal and differentiation of neural stem cells.
  • Autophagy influences synaptic plasticity, learning, and memory formation in the adult brain.
  • Dysfunctional autophagy is implicated in the pathophysiology of various neurodevelopmental and neurodegenerative disorders.

Conclusions:

  • Autophagy is essential for maintaining the neural stem cell pool and supporting adult neuroplasticity.
  • Understanding autophagy's multifaceted roles offers potential therapeutic targets for neurological disorders.
  • Further research into neuronal autophagy is crucial for advancing brain health and treating related diseases.