Neuronal function and dysfunction of Drosophila dTDP.

Area of Science:

• Neuroscience
• Genetics
• Molecular Biology

Background:

• TDP-43 is a conserved RNA/DNA-binding protein.
• It is implicated in neurodegenerative diseases like ALS and FTLD.
• Mammalian TDP-43 is found in ubiquitin-positive inclusions in diseased neurons.

Purpose of the Study:

• Investigate the function and dysfunction of Drosophila TDP-43 (dTDP).
• Explore dTDP's role in neuronal processes like learning and locomotion.
• Validate Drosophila as a model for TDP-43 proteinopathies.

Main Methods:

• Genetic, behavioral, molecular, and cytological analyses in Drosophila.
• Manipulation of dTDP expression in motor neurons and mushroom bodies.
• Assessment of locomotion, neuromuscular junction (NMJ) morphology, and learning behavior.

Main Results:

• dTDP depletion caused locomotion defects and increased NMJ boutons.
• dTDP overexpression in motor neurons reduced activity and NMJ complexity.
• dTDP overexpression in mushroom bodies impaired learning and caused axonal defects.
• dTDP overexpression led to cytosolic aggregate formation.

Conclusions:

• Drosophila dTDP plays vital roles in learning and locomotion.
• Eukaryotic TDP-43 may prevent excessive synapse development.
• Drosophila serves as a feasible model for studying TDP-43 function and disease.