Preclinical evaluation of sunitinib as single agent or in combination with chemotherapy in nasopharyngeal carcinoma
Publication in refereed journal


摘要Purpose: 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 mu M 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.
著者Hui EP, Lui VWY, Wong CSC, Ma BBY, Lau CPY, Cheung CSF, Ho K, Cheng SH, Ng MHL, Chan ATC
期刊名稱Investigational New Drugs
詳細描述[Epub ahead of print].
頁次1123 - 1131
關鍵詞Antiangiogenesis; Microvessel density; Nasopharyngeal cancer; Necrosis; Preclinical; Sunitinib
Web of Science 學科類別Oncology; ONCOLOGY; Pharmacology & Pharmacy; PHARMACOLOGY & PHARMACY

上次更新時間 2021-20-09 於 23:43