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Neurogenesis and Regeneration of Nervous Tissue01:15

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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-derived neurotrophic factor and its clinical implications.

Siresha Bathina1, Undurti N Das2

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|January 21, 2016
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Summary

Brain-derived neurotrophic factor (BDNF) supports neuron survival and function, impacting learning and memory. This neurotrophin also regulates glucose metabolism and protects against beta cell exhaustion, suggesting its therapeutic potential for neurodegenerative diseases and diabetes.

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Alzheimer's diseasebrain-derived neurotrophic factordiabetes mellitusneurotransmissionsignal transductionβ cell

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Area of Science:

  • Neuroscience
  • Endocrinology
  • Molecular Biology

Background:

  • Brain-derived neurotrophic factor (BDNF) is vital for neuronal survival, growth, neurotransmission, and plasticity, essential for cognitive functions like learning and memory.
  • BDNF is expressed throughout the central nervous system (CNS) and peripheral tissues, including the gut.
  • Dysregulation of BDNF is linked to neurodegenerative conditions such as Alzheimer's and Parkinson's disease.

Purpose of the Study:

  • To elucidate the role of BDNF in neuronal survival, plasticity, and its implications in neurodegenerative diseases.
  • To investigate BDNF's function in regulating glucose metabolism and pancreatic beta cell survival.
  • To explore the potential of BDNF as a therapeutic agent for metabolic and neurodegenerative disorders.

Main Methods:

  • Review of literature on BDNF signaling pathways, including its interaction with the TrkB receptor.
  • Analysis of BDNF's downstream signaling cascades (IRS1/2, PI3K, Akt, CREB, CBP, p-CAMK, MAPK).
  • Examination of studies correlating BDNF levels with neurodegenerative diseases and diabetes mellitus.

Main Results:

  • BDNF activates TrkB receptors, initiating signaling cascades that promote the production of proteins crucial for beta cell survival.
  • BDNF shares downstream signaling pathways with insulin-like growth factor-1, enhancing pro-survival gene expression.
  • Reduced BDNF levels are associated with significant neuronal loss in diseases like Parkinson's, Alzheimer's, multiple sclerosis, and Huntington's disease.

Conclusions:

  • BDNF plays a critical role in maintaining neuronal health and cognitive function.
  • BDNF actively regulates glucose and energy metabolism, protecting beta cells from exhaustion.
  • BDNF holds promise for the prevention and management of both neurodegenerative diseases and diabetes mellitus.