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Related Experiment Videos

Heat-shock protein synthesis by human polymorphonuclear cells.

N S Eid, R E Kravath, K W Lanks

    The Journal of Experimental Medicine
    |May 1, 1987
    PubMed
    Summary

    Mature neutrophils can synthesize heat-shock proteins (HSPs) when cultured. This finding supports the idea that gene activation plays a physiological role in these terminally differentiated cells.

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    Area of Science:

    • Cellular biology
    • Immunology
    • Molecular biology

    Background:

    • Mature human neutrophils possess limited protein biosynthesis capabilities.
    • The inducible nature of gene expression in terminally differentiated neutrophils remains largely unexplored.

    Purpose of the Study:

    • To investigate the potential for heat-shock protein (HSP) synthesis in mature human neutrophils.
    • To determine if gene activation is a functional process in terminally differentiated neutrophils.

    Main Methods:

    • Neutrophils were cultured short-term and exposed to various temperatures.
    • Heat-shock protein synthesis (hsp70 and hsp85) was monitored.
    • The effect of actinomycin D on heat-shock response was assessed.

    Main Results:

    • Neutrophils demonstrated inducible synthesis of heat-shock proteins (hsp70 and hsp85) upon heat exposure.
    • The induction pattern was characteristic of mammalian cell systems, with defined temperature and time courses.
    • Actinomycin D effectively blocked the heat-shock response, indicating a requirement for active gene transcription.

    Conclusions:

    • Terminally differentiated neutrophils can activate heat-shock protein genes in response to thermal stress.
    • This heat-shock response supports the hypothesis that gene activation has a physiological role in neutrophils.
    • The findings suggest that other gene products may also be inducible in neutrophils, opening new avenues for research.

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