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Updated: Aug 9, 2026

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Published on: September 3, 2014
SALM synaptic cell adhesion-like molecules regulate the differentiation of excitatory synapses
Jaewon Ko1, Seho Kim, Hye Sun Chung
1National Creative Research Initiative Center for Synaptogenesis and Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Korea.
Synaptic cell adhesion-like molecules (SALMs) regulate excitatory synapse development. SALM2 specifically promotes the formation and maintenance of excitatory synapses and dendritic spines.
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Biology
Background:
- Synaptic cell adhesion molecules (CAMs) are crucial for synaptic structure and function.
- The postsynaptic density (PSD) is a complex protein network at excitatory synapses.
Purpose of the Study:
- To identify and characterize novel cell adhesion-like molecules interacting with PSD-95.
- To investigate the role of the SALM family, particularly SALM2, in excitatory synapse differentiation.
Main Methods:
- Identification of SALM family interacting with PSD-95.
- Analysis of SALM2 localization in neurons.
- Experimental manipulation of SALM2 expression (overexpression and knockdown).
- Assessment of synaptic structure (synapse number, dendritic spines) and function (miniature excitatory postsynaptic currents).
Main Results:
- SALM2 localizes to excitatory synaptic sites.
- SALM2 overexpression enhances excitatory synapse and dendritic spine formation.
- Mislocalized SALM2 disrupts excitatory synapses.
- SALM2 aggregation co-clusters PSD-95 and AMPA receptors.
- SALM2 knockdown reduces excitatory synapses, spines, and synaptic current frequency.
Conclusions:
- SALM2 is a key regulator of excitatory synapse differentiation.
- SALM2 plays a vital role in the structural and functional development of excitatory synapses.
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