Abstract:
:We investigated the inhibitory effect of sunitinib, a newly approved multitargeted tyrosine kinase inhibitor, against the progression of renal cell cancer (RCC) bone metastases in vivo. In vitro cell proliferation was determined using the MTS assay. To investigate the inhibitory effects of sunitinib in vivo, we established luciferase-labeled ACHN(Luc) cells derived from papillary RCC. Mice in which ACHN(Luc) cells had been transplanted into the left ventricle to establish bone metastases were treated orally with 40 mg/kg/day sunitinib or vehicle control for 3 weeks. Growth of the cancer cells was monitored using an in vivo imaging system. In addition, 16 patients with metastatic RCC were treated with sunitinib, and serum and urine levels of amino-terminal telopeptide (NTx) were measured as markers of bone resorption. Sunitinib did not inhibit the growth of RCC cells in vitro at clinically or experimentally achievable serum levels (100 nM-1 μM). To investigate the inhibitory effect of sunitinib in vivo, we established luciferase-labeled human RCC cells (ACHN(Luc) ). Sunitinib prevented the growth of ACHN(Luc) RCC cells in the bone metastatic mouse model. The number of osteoclasts in sunitinib-treated mice was significantly less than that in control mice. Serum and urine levels of NTx in patients with metastatic RCC declined significantly during the first 4 weeks of sunitinib treatment (p = 0.027). Sunitinib is a potent anticancer agent for RCC bone metastases, at least for papillary RCC.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Maita S,Yuasa T,Tsuchiya N,Mitobe Y,Narita S,Horikawa Y,Hatake K,Fukui I,Kimura S,Maekawa T,Habuchi Tdoi
10.1002/ijc.26034subject
Has Abstractpub_date
2012-02-01 00:00:00pages
677-84issue
3eissn
0020-7136issn
1097-0215journal_volume
130pub_type
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