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Published on: September 15, 2014
Neurotrophin action on a rapid timescale
Yury Kovalchuk1, Knut Holthoff, Arthur Konnerth
1Institut für Physiologie, Ludwig-Maximilians-Universität München, 80336 München, Germany.
Current Opinion in Neurobiology
|October 7, 2004
Summary
Neurotrophins rapidly influence brain cell activity and communication by modulating ion channels and receptors. These fast actions shape neuronal function and synaptic plasticity.
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Signaling
Background:
- Neurotrophins are crucial for neuronal development and function.
- Their rapid signaling mechanisms are not fully understood.
- Key targets include ion channels and neurotransmitter receptors.
Purpose of the Study:
- To elucidate the rapid signaling pathways of neurotrophins.
- To identify the molecular players involved in their fast actions.
- To understand how neurotrophins modulate neuronal excitability and synaptic transmission.
Main Methods:
- Investigated intracellular calcium (Ca2+) signaling.
- Examined modulation of N-methyl-d-aspartate (NMDA) receptor activity.
- Studied regulation of the K(+)-Cl(-) cotransporter KCC2.
- Assessed activation of TrkB and Na(v)1.9 channels.
Main Results:
- Neurotrophin actions occur within milliseconds.
- Fast signaling involves Ca2+ signaling, neuronal excitation, and modulation of NMDA receptors and KCC2.
- Brain-derived neurotrophic factor and neurotrophin-4/5 activate TrkB and Na(v)1.9 channels.
Conclusions:
- Neurotrophins exert rapid control over neuronal activity and synaptic transmission.
- These fast actions are mediated by specific ion channels and receptor modulation.
- Neurotrophins provide instructive signals for synaptic plasticity and long-term changes.
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