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Abstract Title:

Alantolactone induces G1 phase arrest and apoptosis of multiple myeloma cells and overcomes bortezomib resistance.

Abstract Source:

Apoptosis. 2015 Aug ;20(8):1122-33. PMID: 26033479

Abstract Author(s):

Yao Yao, Dandan Xia, Yueping Bian, Yueyue Sun, Feng Zhu, Bin Pan, Mingshan Niu, Kai Zhao, Qingyun Wu, Jianlin Qiao, Chunling Fu, Zhenyu Li, Kailin Xu

Article Affiliation:

Yao Yao

Abstract:

Several sesquiterpene lactones have been extracted and demonstrated to exert various pharmacological functions in a variety of cancers. Here, we investigated anti-tumor effect of alantolactone, an allergenic sesquiterpene lactone, on human multiple myeloma (MM) and showed alantolactone inhibited growth of MM cells, both in the presence or absence of bone marrow (BM)-derived stromal cells (HS-5), and subsequent G1 phase arrest, and apoptosis as demonstrated by increased Annexin-V/7-AAD binding, caspase-3 or caspase-9 activation and down-modulation of activation of extracellular signal-regulated kinases 1/2. In addition, alantolactone reduced the secretion of MM survival and growth-related cytokines, vascular endothelial growth factor, from MM cells or HS-5 cells, and inhibited cytokine-induced osteoclastogenesis. Notably, alantolactone also inhibited cell proliferation in bortezomib-resistant MM cells. Taken together, alantolactone exerted anti-tumor effect on MM by suppressing cell proliferation, triggering apoptosis, partly damaging the BM microenvironment and overcoming proteasome inhibitor resistance, suggesting alantolactone may be a novel therapeutic approach for the treatment of human MM.

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