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Protein equilibration through somatic ring canals in Drosophila
1Department of Genetics, Yale School of Medicine, 333 Cedar Street, New Haven, CT 06520, USA.
Science (New York, N.Y.)
|May 25, 2013
Summary
Somatic ring canals in Drosophila allow cytoplasmic sharing between cells, promoting uniform protein levels. This challenges the idea of isolated cell function in developing tissues.
Area of Science:
- Developmental Biology
- Cell Biology
- Genetics
Background:
- Intercellular bridges, or ring canals, from incomplete cytokinesis in Drosophila somatic tissues are known but their functional impact remains unclear.
- Understanding intercellular communication is crucial for tissue development and homeostasis.
Purpose of the Study:
- To investigate the role of somatic ring canals in intercellular communication and cytoplasmic exchange.
- To determine if ring canals facilitate protein equilibration between connected cells in Drosophila tissues.
Main Methods:
- Utilized Drosophila ovary follicle cells and larval imaginal discs.
- Analyzed diffusion of cytoplasmic contents across ring canals and mitotic clone boundaries.
- Examined protein equilibration in transcriptionally mosaic follicle cells.
Main Results:
- Demonstrated that somatic ring canals (~250 nm diameter) allow diffusion of cytoplasmic contents between connected cells.
- Showed that ring canals facilitate protein equilibration in mosaic follicle cells of the Drosophila ovary.
- Observed similar, though more restricted, cytoplasmic diffusion in larval imaginal discs.
Conclusions:
- Somatic ring canals facilitate cytoplasmic content diffusion, indicating a lack of cytoplasmic autonomy in these Drosophila tissues.
- Ring canals likely play a role in promoting homogeneous protein expression within developing tissues.
