Abstract
Heat shock treatment of human Hep 3B hepatoma cells led to the induction of mRNA for microsomal heme oxygenase. The maximum induction of heme oxygenase mRNA (5→7-fold) was observed with treatment of cells at 43.5°C, for 60 min. The heat-mediated induction of heme oxygenase mRNA was blocked by simultaneous treatment of cells with actinomycin D or cycloheximide. In contrast to Hep 3B cells, cells of another human hepatoma line, Hep G2, showed little induction of heme oxygenase mRNA by heat treatment. These findings suggest that heat shock treatment induces heme oxygenase mRNA in certain human hepatoma cells, but not in others.
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