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Connectin mediates adhesion in Drosophila
1Department of Anatomy, University of Cambridge, United Kingdom.
Neuron
|June 1, 1997
Summary
Connectin, a Drosophila cell-surface molecule, mediates muscle adhesion. Connectin mutants exhibit impaired muscle attachment, and misexpression causes excessive adhesion and axon pathfinding defects, supporting its role in cell adhesion.
Area of Science:
- Developmental Biology
- Cell Adhesion
- Neuroscience
Background:
- Connectin is a Drosophila cell-surface molecule implicated in cell-cell adhesion.
- Previous studies showed connectin mutants lacked obvious neuromuscular defects, questioning its in vivo adhesion role.
Purpose of the Study:
- To investigate the in vivo function of connectin in Drosophila.
- To clarify connectin's role in muscle attachment and axon pathfinding.
Main Methods:
- Analysis of connectin mutants in Drosophila.
- In vivo misexpression studies of connectin.
- Observation of muscle adhesion and axon pathfinding phenotypes.
Main Results:
- Connectin mutants display defective adhesion between pleural muscles.
- Misexpression of connectin leads to excessive adhesion in normally non-adhesive muscles.
- Misexpression also results in axon pathfinding errors.
Conclusions:
- Connectin plays a crucial role in in vivo cell adhesion, particularly in muscle attachment.
- Observed phenotypes, including axon pathfinding defects, are consistent with connectin's adhesive function, not repulsion.