Toxicological Research

Korean Society of Toxicology & Korea Environmental Mutagen Society (한국독성학회)
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Inhibition of IgM Secretion in Murine B Cell Lymphoma by Hydrogen Peroxide

  • Published : 2002.12.01
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Abstract

Reactive of gen species (ROS) contribute to several cellular function and are involved in the regulation of signal transduction, gene expression, and proliferation. In the present study, we investigated the effect of $H_2O_2$ treatment on IgM secretion in LPS-stimulated murine B Iymphoma, CH12.LX. Cells were treated directly With $H_2O_2$ and stimulated with LPS. $H_2O_2$ treatment during 72 h time period inhibited IgM secretion in LPS-stimulated CH12.LX cells in a dose- and time-dependent manners. After treatment with 50 $\mu\textrm{M}$ $H_2O_2$ during 72 h time period, the level of IgM in LPS-stimulated CH12.LX cells was markedly decreased, whereas cell viability was not significantly changed. Addition of $H_2O_2$ concomitantly with LPS, or 12 h post-LPS stimulation, produced a significant inhibition of IgM secretion, Whereas inhibitory effect of $H_2O_2$ on IgM secretion was not observed when added 24 h after LPS stimulation. These findings suggest that $H_2O_2$ can inhibit the secretion of IgM in LPS-stimulated CH15.LX cells, and may alter the events necessary for terminal B cell differentiation.

Keywords

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