A lateralized sensory signaling pathway mediates context-dependent olfactory plasticity in C. elegans

Area of Science:

• Neuroscience
• Molecular Biology
• Behavioral Genetics

Background:

• Neuronal function lateralization is key for behavioral flexibility.
• Context-dependent plasticity in C. elegans involves symmetric odor response inversion in bilateral AWC olfactory neurons.

Purpose of the Study:

• To elucidate the molecular mechanisms driving symmetric neuronal response plasticity.
• To investigate the role of asymmetric molecular mechanisms in AWC neuron pairs for behavioral flexibility.

Main Methods:

• Utilized C. elegans as a model organism.
• Employed genetic mutations (gcy-12) to study olfactory neuron response plasticity.
• Investigated the expression and function of gcy-12 in AWC neurons.
• Examined the impact of disrupting AWC fate lateralization.

Main Results:

• Mutations in gcy-12 abolish odor response plasticity specifically in AWC OFF neurons.
• Asymmetric molecular mechanisms in AWC neuron pairs drive symmetric response plasticity.
• Disruption of AWC fate lateralization leads to loss of asymmetry in response plasticity in gcy-12 mutants.

Conclusions:

• Symmetric neuronal response plasticity can emerge from asymmetric molecular underpinnings.
• Lateralization of signaling pathways can enhance neuronal and behavioral flexibility in specific contexts.