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Neurotrophic factors and neuronal death
Ciba Foundation Symposium
|January 1, 1987
Summary
Researchers explored neurotrophic factors like nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF) for neuron survival. They found BDNF supports specific neurons that NGF does not, highlighting distinct roles in neural development.
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Biology
Background:
- Nerve growth factor (NGF) is crucial for peripheral sympathetic and sensory neurons in vivo and in vitro.
- In vitro systems provide a basis for discovering and purifying new neurotrophic molecules.
- Extracellular matrix molecules, like laminin, modulate neurotrophic factor effects.
Purpose of the Study:
- To discuss experimental approaches for purifying novel neurotrophic factors, including BDNF and CNTF.
- To investigate the distinct biological actions of BDNF compared to NGF.
- To explore the trophic supply mechanisms for primary sensory neurons.
Main Methods:
- In vitro analytical procedures for neurotrophic factor purification.
- Characterization of physico-chemical properties of BDNF.
- Comparative analysis of NGF and BDNF effects on neuronal survival.
Main Results:
- BDNF (12 kDa, pI ~10) shares some characteristics with NGF but has different biological actions.
- BDNF supports the survival of retinal ganglion cells and placode-derived sensory neurons, unlike NGF.
- A hypothesis is proposed regarding limited neurotrophic molecule supply to sensory neurons from both central and peripheral axons.
Conclusions:
- BDNF represents a distinct neurotrophic factor with unique targets compared to NGF.
- Understanding neurotrophic factor actions is vital for neural development and survival.
- Sensory neuron survival may depend on a dual supply of neurotrophic factors from their targets.