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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Acemannan, a beta-(1,4)-acetylated mannan, induces nitric oxide production in macrophage cell line RAW 264.7.

Acemannan is a polydispersed beta-(1,4)-linked acetylated mannan with antiviral properties. It is an immunomodulator, and studies in our laboratory have shown that it causes activation of macrophages. Inducible NO synthase is generally expressed after transcriptional induction and is known to mediate some of the cytotoxic action of activated macrophages. Acemannan, in the presence of interferon-gamma, greatly increased the synthesis of NO in RAW 264.7 cells. This increase was preceded by increased expression of mRNA for the inducible form of macrophage NO synthase. Preincubation with pyrrolidine dithiocarbamate inhibited the induction, indicating the involvement of nuclear factor-kappa B. These results suggest that acemannan causes the activation of macrophages by increasing the level of NO synthase at the level of transcription.[1]

References

  1. Acemannan, a beta-(1,4)-acetylated mannan, induces nitric oxide production in macrophage cell line RAW 264.7. Ramamoorthy, L., Kemp, M.C., Tizard, I.R. Mol. Pharmacol. (1996) [Pubmed]
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