Farnesol inhibits tumor growth and enhances the anticancer effects of bortezomib in multiple myeloma xenograft mouse model through the modulation of STAT3 signaling pathway

被引:121
|
作者
Lee, Jong Hyun [1 ]
Kim, Chulwon [1 ]
Kim, Sung-Hoon [1 ]
Sethi, Gautam [2 ]
Ahn, Kwang Seok [1 ]
机构
[1] Kyung Hee Univ, Coll Korean Med, Seoul 130701, South Korea
[2] Natl Univ Singapore, Yong Loo Lin Sch Med, Dept Pharmacol, Singapore 117597, Singapore
关键词
Farnesol; STAT3; Multiple myeloma; Apoptosis; ISOPRENOID-MEDIATED INHIBITION; CONSTITUTIVE ACTIVATION; PANCREATIC-CANCER; PPAR-ALPHA; MEVALONATE SYNTHESIS; DIETARY ISOPRENOIDS; MOLECULAR TARGETS; PERILLYL ALCOHOL; BREAST-CANCER; APOPTOSIS;
D O I
10.1016/j.canlet.2015.02.024
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Aberrant activation of signal transducer and activator of transcription 3 (STAT3) is frequently observed in multiple myeloma (MM) cancer and can upregulate the expression of several genes involved in proliferation, survival, metastasis, and angiogenesis. The effect of famesol (FOH) on STAT3 activation, associated protein kinases, its regulated gene products, cellular proliferation, and apoptosis was examined. The in vivo effect of FOH on the growth of human MM xenograft tumors alone and in combination with bortezomib (Bor) in athymic nu/nu female mice was also investigated. We found that FOH suppressed both constitutive and inducible STAT3 activation at Tyr705 in MM cells. The suppression of STAT3 was mediated through the inhibition of activation of upstream JAK1, JAK2, and c-Src kinases. Also, treatment with the protein tyrosine phosphatase (PTP) inhibitor, pervanadate treatment reversed the FOH-induced downregulation of STAT3, possibly indicating the involvement of a PTP. Indeed, we found that FOH treatment induces the increased expression of SHP-2 protein and knockdown of the SHP-2 gene by small interfering RNA suppressed the ability of FOH to inhibit STAT3 activation. FOH inhibited proliferation and significantly potentiated the apoptotic effects of bortezomib (Bar) in U266 cells. When administered intraperitoneally, FOH enhanced Bor-induced growth suppression of human MM xenograft tumors in athymic nu/nu female mice. Our results suggest that FOH is a novel blocker of STAT3 signaling pathway and exerts both anti-proliferative and apoptotic activities in MM in vitro and in vivo. (C) 2015 Elsevier Ireland Ltd. All rights reserved.
引用
收藏
页码:280 / 293
页数:14
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