Related Experiment Video
Updated: Aug 7, 2026
11:49
Protocol for Culturing Sympathetic Neurons from Rat Superior Cervical Ganglia (SCG)
Published on: January 30, 2009
Local control of neurite development by nerve growth factor
Summary
Nerve growth factor (NGF) is crucial for sympathetic neuron neurite growth and survival. Local NGF availability dictates neurite extension and maintenance, independent of soma exposure, highlighting its role in target innervation.
Area of Science:
- Neuroscience
- Cell Biology
- Developmental Biology
Background:
- Sympathetic neurons require nerve growth factor (NGF) for development.
- The precise role of local NGF availability in neurite maintenance and survival remains incompletely understood.
Purpose of the Study:
- To investigate the necessity of local nerve growth factor (NGF) for the growth and survival of sympathetic neuron neurites.
- To differentiate the NGF requirements of neurite terminals versus neuronal cell bodies.
Main Methods:
- Development of a novel three-chamber culture system allowing independent control of fluid environments.
- Culturing sympathetic neurons with barriers to separate soma/proximal neurites from distal neurites.
- Manipulating local nerve growth factor (NGF) concentrations in different chambers.
Main Results:
- Neurites penetrated barriers only when nerve growth factor (NGF) was present on both sides.
- Local removal of NGF from distal neurites halted growth and caused degeneration, irrespective of proximal NGF levels.
- Neurites survived NGF withdrawal at the soma if connected to NGF-rich distal environments.
Conclusions:
- Neurite growth and survival are dependent on localized nerve growth factor (NGF) availability.
- This localized requirement supports the role of target-derived NGF in establishing and maintaining neuronal connections.
Related Concept Videos
01:00Enzyme-linked Receptors
Enzyme-linked receptors are proteins that act as both receptor and enzyme, activating multiple intracellular signals. This is a large group of receptors that include the receptor tyrosine kinase (RTK) family. Many growth factors and hormones bind to and activate the RTKs.
Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...
Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...
01:15Neurogenesis and Regeneration of Nervous Tissue
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...