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Article: Preclinical evaluation of sunitinib as single agent or in combination with chemotherapy in nasopharyngeal carcinoma

TitlePreclinical evaluation of sunitinib as single agent or in combination with chemotherapy in nasopharyngeal carcinoma
Authors
Issue Date2011
Citation
Investigational New Drugs, 2011, v. 29 n. 6, p. 1123-1131 How to Cite?
AbstractPurpose: Sunitinib is a multi-target receptor tyrosine kinase (RTK) inhibitor against vascular endothelial growth factor receptors, platelet-derived growth factor receptors (PDGFR), c-kit and RET. Several of these RTKs are known to be involved in the progression of nasopharyngeal carcinoma (NPC). Here, we evaluated the preclinical activities of sunitinib in NPC. Method: We determined the basal level of total and phosphorylated PDGFR, c-kit and RET by immunoblotting in a panel of five NPC cell lines. The effect of sunitinib on NPC cell proliferation was evaluated by MTT assay. We further studied the effect of sunitinib on NPC cell cycle progression and apoptosis. We investigated the in vitro and in vivo activities of sunitinib as single agent and in combination with cisplatin or docetaxel in NPC cell lines and tumor xenografts. Results: Sunitinib exhibited dose-dependent growth inhibition in all NPC cell lines tested with IC 50 between 2-7.5 μM and maximum inhibition of over 97%. Sunitinib induced apoptosis and cell cycle arrest at G 0/G 1 phase. In vitro, sunitinib moderately enhanced the growth inhibition of cisplatin or docetaxel. Single agent sunitinib demonstrated significant growth inhibition, reduced microvessel density and caused extensive tumor necrosis in a NPC xenograft model. However, concurrent administration of sunitinib and docetaxel induced severe toxicity in mice without enhanced antitumor effect. Conclusions: Single agent sunitinib demonstrated potent in vitro and in vivo growth inhibition in NPC. When combined with chemotherapy, sequential instead of concurrent administration schedule should be further explored. © Springer Science+Business Media, LLC 2010.
Persistent Identifierhttp://hdl.handle.net/10722/194374
ISSN
2015 Impact Factor: 3.281
2015 SCImago Journal Rankings: 1.376
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorHui, EP-
dc.contributor.authorLui, VWY-
dc.contributor.authorWong, CSC-
dc.contributor.authorMa, BBY-
dc.contributor.authorLau, CPY-
dc.contributor.authorCheung, CSF-
dc.contributor.authorHo, K-
dc.contributor.authorCheng, S-H-
dc.contributor.authorNg, MHL-
dc.contributor.authorChan, ATC-
dc.date.accessioned2014-01-30T03:32:30Z-
dc.date.available2014-01-30T03:32:30Z-
dc.date.issued2011-
dc.identifier.citationInvestigational New Drugs, 2011, v. 29 n. 6, p. 1123-1131-
dc.identifier.issn0167-6997-
dc.identifier.urihttp://hdl.handle.net/10722/194374-
dc.description.abstractPurpose: Sunitinib is a multi-target receptor tyrosine kinase (RTK) inhibitor against vascular endothelial growth factor receptors, platelet-derived growth factor receptors (PDGFR), c-kit and RET. Several of these RTKs are known to be involved in the progression of nasopharyngeal carcinoma (NPC). Here, we evaluated the preclinical activities of sunitinib in NPC. Method: We determined the basal level of total and phosphorylated PDGFR, c-kit and RET by immunoblotting in a panel of five NPC cell lines. The effect of sunitinib on NPC cell proliferation was evaluated by MTT assay. We further studied the effect of sunitinib on NPC cell cycle progression and apoptosis. We investigated the in vitro and in vivo activities of sunitinib as single agent and in combination with cisplatin or docetaxel in NPC cell lines and tumor xenografts. Results: Sunitinib exhibited dose-dependent growth inhibition in all NPC cell lines tested with IC 50 between 2-7.5 μM and maximum inhibition of over 97%. Sunitinib induced apoptosis and cell cycle arrest at G 0/G 1 phase. In vitro, sunitinib moderately enhanced the growth inhibition of cisplatin or docetaxel. Single agent sunitinib demonstrated significant growth inhibition, reduced microvessel density and caused extensive tumor necrosis in a NPC xenograft model. However, concurrent administration of sunitinib and docetaxel induced severe toxicity in mice without enhanced antitumor effect. Conclusions: Single agent sunitinib demonstrated potent in vitro and in vivo growth inhibition in NPC. When combined with chemotherapy, sequential instead of concurrent administration schedule should be further explored. © Springer Science+Business Media, LLC 2010.-
dc.languageeng-
dc.relation.ispartofInvestigational New Drugs-
dc.titlePreclinical evaluation of sunitinib as single agent or in combination with chemotherapy in nasopharyngeal carcinoma-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s10637-010-9451-1-
dc.identifier.pmid20467883-
dc.identifier.scopuseid_2-s2.0-84255164605-
dc.identifier.volume29-
dc.identifier.issue6-
dc.identifier.spage1123-
dc.identifier.epage1131-
dc.identifier.isiWOS:000294824200001-

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