Anti sense-mediated suppression of hyaluronan synthase 2 inhibits the tumorigenesis and progression of breast cancer

被引:106
作者
Udabage, L
Brownlee, GR
Waltham, M
Blick, T
Walker, EC
Heldin, P
Nilsson, SK
Thompson, EW
Brown, TJ
机构
[1] Monash Univ, Fac Med, Dept Biochem & Mol Biol, Lab Hyaluronan Res, Clayton, Vic 3800, Australia
[2] St Vincents Inst Med Res, Melbourne, Vic, Australia
[3] Ludwig Inst Canc Res, Dept Med Biochem & Microbiol, Uppsala, Sweden
[4] Peter MacCallum Canc Inst, Stem Cell Lab, Melbourne, Australia
关键词
D O I
10.1158/0008-5472.CAN-04-1622
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
The progression of several cancers is correlated with the increased synthesis of the glycosaminoglycan, hyaluronan. Hyaluronan is synthesized at the plasma membrane by various isoforms of hyaluronan synthases (HAS). The importance of HAS2 expression in highly invasive breast cancer was characterized by the antisense inhibition of HAS2 (ASHAS2). The effect of HAS2 inhibition on cell proliferation, migration, hyaluronan metabolism, and receptor status was characterized in vitro, whereas the effect on tumorigenicity and metastasis was established in vivo. HAS2 inhibition resulted in a 24-hour lag in proliferation that was concomitant to transient arrest of 79% of the cell population in G(0)-G(1). Inhibition of HAS2 did not alter the expression of the other HAS isoforms, whereas hyaluronidase (HYAL2) and the hyaluronan receptor, CD44, were significantly down-regulated. ASHAS2 cells accumulated greater amounts of high molecular weight hyaluronan (> 10,000 kDa) in the culture medium, whereas mock and parental cells liberated less hyaluronan of three distinct molecular weights (100, 400, and 3,000 kDa). The inhibition of HAS2 in the highly invasive MDA-MB-231 breast cancer cell line inhibited the initiation and progression of primary and secondary tumor formation following s.c. and intracardiac inoculation into nude mice, whereas controls readily established both primary and secondary tumors. The lack of primary and secondary tumor formation was manifested by increased survival times where ASHAS2 animals survived 172% longer than the control animals. Collectively, these unique results strongly implicate the central role of HAS2 in the initiation and progression of breast cancer, potentially highlighting the codependency between HAS2, CD44, and HYAL2 expression.
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收藏
页码:6139 / 6150
页数:12
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