Systematic Profiling and Functional Characterization of Alternative Splicing in C. elegans Olfactory Learning.

Area of Science:

• Neuroscience
• Molecular Biology
• Genetics

Background:

• Alternative splicing (AS) is a common mechanism in neuronal gene expression.
• The role of AS in learning processes remains largely uncharacterized.

Purpose of the Study:

• To systematically investigate the function of AS in learning.
• To profile translatome changes in C. elegans during a learning paradigm.

Main Methods:

• Profiling pan-neuronal translatome changes in C. elegans.
• Analyzing genome-wide AS patterns in response to learning.
• Investigating the role of the TWNK-1 gene and its isoforms in learning.

Main Results:

• AS remodels neuronal genes critical for learning at a genome-wide scale.
• AS affects a distinct gene set compared to transcript abundance changes, acting as a separate regulatory layer.
• The mitochondrial DNA helicase TWNK-1 exhibits learning-associated AS, with its isoforms regulating learning in sensory neurons.
• AS of TWNK-1 modulates mitochondrial signaling to peripheral tissues, influencing physiological states essential for learning.

Conclusions:

• AS is a systematic regulator of learning in C. elegans.
• AS shapes physiological states through mechanisms like mitochondrial signaling to facilitate learning.