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Vimentin intermediate filaments in fish melanophores
F K Gyoeva1, E V Leonova, V I Rodionov
1Institute of Protein Research Academy of Science of the USSR, Pushchino, Moscow Region.
Journal of Cell Science
|December 1, 1987
Summary
Teleost melanophores, the pigment cells of fish, contain a robust network of vimentin intermediate filaments. This radial system of fibrils is crucial for cell structure and function.
Area of Science:
- Cell Biology
- Zoology
- Biochemistry
Background:
- Melanophores are pigment-containing cells in fish responsible for skin coloration.
- Intermediate filaments are crucial cytoskeletal components providing structural support to cells.
- The specific organization of intermediate filaments in fish melanophores remains incompletely understood.
Purpose of the Study:
- To investigate the distribution and chemical composition of intermediate filaments in cultured melanophores of two teleost species.
- To characterize the vimentin intermediate filament network within these cells.
Main Methods:
- Immunofluorescence staining using specific antibodies against vimentin.
- Immunoblotting to confirm protein presence.
- Transmission electron microscopy for ultrastructural analysis.
- Treatment with 0.6 M-KCl and nocodazole to assess filament stability.
Main Results:
- A system of vimentin-positive fibrils was observed radiating from the cell center in melanophores.
- These intermediate filaments demonstrated resistance to chemical and drug treatments.
- Transmission electron microscopy confirmed the presence of intermediate filaments.
- Immunoblotting verified vimentin as the primary intermediate filament protein.
Conclusions:
- Teleost melanophores possess a well-developed radial system of vimentin intermediate filaments.
- This cytoskeletal network is stable and likely plays a significant role in melanophore structure and function.
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