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Ultrastructural analysis of cytoplasmic intermediate filaments and the nuclear lamina in the mouse plasmacytoma cell line MPC−11 after the induction of vimentin synthesis

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons95345

Shoeman,  Robert L.
Coherent diffractive imaging, Max Planck Institute for Medical Research, Max Planck Society;
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;
Analytical Protein Biochemistry, Max Planck Institute for Medical Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons118183

Giese,  Günter
Department of Biomedical Optics, Max Planck Institute for Medical Research, Max Planck Society;
Light Microscopy Facility, Max Planck Institute for Medical Research, Max Planck Society;

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Citation

Wang, X., Willingale−Theune, J., Shoeman, R. L., Giese, G., & Traub, P. (1989). Ultrastructural analysis of cytoplasmic intermediate filaments and the nuclear lamina in the mouse plasmacytoma cell line MPC−11 after the induction of vimentin synthesis. Eur. J. Cell Biol., 50(2), 462-474. Retrieved from http://www.ncbi.nlm.nih.gov/pubmed/2627942.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-AD82-4
Abstract
We examined cytoplasmic intermediate filaments (IFs) and the nuclear lamina in cells of the mouse plasmacytoma cell line MPC−11 (lacking both IF proteins and lamins A and C) after induction of vimentin synthesis with the phorbol ester 12−O−tetradecanoylphorbol−13−acetate (TPA) by means of whole−mount immunogold electron microscopy (IEM). The technique of IEM was modified to allow analysis of the cytoskeleton and nuclear lamina of cells grown in suspension culture employing antibodies against vimentin and lamin B. IEM showed that newly synthesized vimentin assembled into IFs which formed anastomosing networks throughout the cytoplasm, radiating primarily from the nucleus. The filaments decorated by gold−conjugated antibodies appeared to make contact with the lipid−depleted nuclear envelope residue either by directly terminating on it or through an indirect link via short fibers of varying diameter. Some filaments terminated on the subunits of the nuclear pore complexes but they did not pass through the pores. In the absence of lamins A and C, lamin B formed a nuclear lamina consisting of a globular−filamentous network anchoring the nuclear pore complexes