Heterosynaptic Plasticity and the Experience-Dependent Refinement of Developing Neuronal Circuits.

Area of Science:

• Neuroscience
• Developmental Biology
• Molecular Biology

Background:

• Synaptic plasticity is crucial for optimizing perception and cognition during development.
• Homosynaptic plasticity, while synapse-specific, can influence neighboring synapses via heterosynaptic interactions.
• In vitro research has elucidated molecular mechanisms of heterosynaptic plasticity.

Purpose of the Study:

• To review the forms and molecular mechanisms of heterosynaptic plasticity.
• To explore the role of heterosynaptic plasticity in refining neuronal responses in vivo.
• To connect heterosynaptic plasticity to critical periods and neuronal circuit development.

Main Methods:

• Review of existing literature on heterosynaptic plasticity.
• Discussion of molecular mechanisms identified through in vitro studies.
• Analysis of in vivo observations and models, including ocular dominance plasticity.

Main Results:

• Heterosynaptic plasticity involves local compensation, facilitation, and cooperative induction of plasticity.
• Emerging in vivo tools enable exploration of heterosynaptic plasticity's role in development.
• Molecular overlaps exist between heterosynaptic and developmental plasticity mechanisms.

Conclusions:

• Heterosynaptic plasticity is a significant contributor to developmental synaptic refinement.
• Further in vivo research is needed to fully understand its role in critical periods and circuit formation.
• Investigating molecular overlaps can reveal new insights into brain development and plasticity.