The gold compound auranofin induces apoptosis of human multiple myeloma cells through both down-regulation of STAT3 and inhibition of NF-κB activity

Nakaya, A.; Sagawa, M.; Muto, A.; Uchida, H.; Ikeda, Y.; Kizaki, M.

Leukemia Research 35(2): 243-249


ISSN/ISBN: 1873-5835
PMID: 20542334
DOI: 10.1016/j.leukres.2010.05.011
Accession: 056353683

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Constitutive activation of NF-κB and STAT3 plays an important role in the cellular proliferation and survival of multiple myeloma cells. We first found that auranofin (AF), a coordinated gold compound, induced a significant level of cell cycle arrest at G1 phase and subsequent apoptosis of myeloma cells. Further, AF inhibited constitutive and IL-6-induced activation of JAK2 and phosphorylation of STAT3 followed by the decreased expression of Mcl-1. AF down-regulated the activation of NF-κB, and the combination of AF and a specific NF-κB inhibitor resulted in a marked decrease of Mcl-1 expression. These results suggest that AF inhibits both IL-6 induced-JAK/STAT pathway and NF-κB activation in myeloma cells.