Heat shock gene expression and cytoskeletal alterations in mouse neuroblastoma cells

Paul M.P. van Bergen en Henegouwen*, Wilbert A.M. Linnemans

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    Abstract

    The cytoskeleton of neuroblastoma cells, clone Neuro 2A, is altered by two stress conditions: heat shock and arsenite treatment. Microtubules are reorganized, intermediate filaments are aggregated around the nucleus, and the number of stress fibers is reduced. Since both stress modalities induce similar cytoskeletal alterations, no thermic denaturation of one or more cytoskeletal components can be involved in this process. Heat shock proteins are induced both by heat and by arsenite. However, cells treated with arsenite synthesize hsp28 which is not detected in heat-treated cells. Synthesis of all hsps is prevented by addition of actinomycin D or cycloheximide. Under these conditions no alterations are observed in the organization of microtubules and intermediate filaments during heat or arsenite treatment. However, these drugs are not able to prevent the rapid loss of stress fibers. A re-formation of the cytoskeleton during the recovery period proceeds within 3 h and is also found to occur in the presence of a protein synthesis inhibitor. These data suggest that reorganization of microtubules and intermediate filaments during a stress treatment requires the synthesis of a new protein(s), probably hsp(s).

    Original languageEnglish
    Pages (from-to)367-375
    Number of pages9
    JournalExperimental Cell Research
    Volume171
    Issue number2
    DOIs
    Publication statusPublished - Aug 1987

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