Suppression of the inflammatory response by curcumin as discussed in the preclinical studies
involves inhibition of the induction of COX-1, COX-2, iNOS, and production of cytokines such as
interferon-γ [90,106]. It seems that many effects are achieved via suppression of the Janus kinase
(JAK)-STAT signalling cascade via its effect on the Src homology 2 domain-containing protein
tyrosine phosphatases (SHP)-2 [107]. In human multiple myeloma cells, curcumin has been shown to
inhibit STAT3 phosphorylation and therefore to down regulate IL-6 production