Molecular mechanisms of long-term potentiation in the insular cortex in vivo

Area of Science:

• Neuroscience
• Molecular Biology
• Synaptic Plasticity

Background:

• The basolateral amygdala (BLA) and insular cortex are crucial for taste learning.
• Understanding the molecular basis of synaptic plasticity in this pathway is essential.

Purpose of the Study:

• To investigate the molecular mechanisms underlying synaptic plasticity in the BLA-insular cortex pathway.
• To determine if these mechanisms are shared with novel taste learning.

Main Methods:

• Induction of in vivo long-term potentiation (LTP) via BLA stimulation.
• Assessment of NMDA receptor and muscarinic acetylcholine receptor involvement.
• Analysis of extracellular regulated kinase 1/2 (ERK1/2) activation.

Main Results:

• BLA-stimulated LTP requires functional NMDA receptors.
• Muscarinic acetylcholine receptors modulate LTP.
• LTP induces ERK1/2 activation in the insular cortex.
• ERK1/2 inhibitors block LTP.

Conclusions:

• Synaptic plasticity in the BLA-insular cortex pathway relies on NMDA receptors and ERK1/2.
• Common molecular mechanisms, including ERK1/2 activation, underpin both synaptic and behavioral plasticity in the insular cortex during taste learning.