Erschienen in:
13.02.2019 | Original Article
Regorafenib regressed a doxorubicin-resistant Ewing’s sarcoma in a patient-derived orthotopic xenograft (PDOX) nude mouse model
verfasst von:
Kentaro Miyake, Tasuku Kiyuna, Kei Kawaguchi, Takashi Higuchi, Hiromichi Oshiro, Zhiying Zhang, Sintawat Wangsiricharoen, Sahar Razmjooei, Yunfeng Li, Scott D. Nelson, Takashi Murakami, Yukihiko Hiroshima, Ryusei Matsuyama, Michael Bouvet, Sant P. Chawla, Shree Ram Singh, Itaru Endo, Robert M. Hoffman
Erschienen in:
Cancer Chemotherapy and Pharmacology
|
Ausgabe 5/2019
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Abstract
Purpose
Ewing’s sarcoma (ES) is a rare and recalcitrant disease which is in need of a development of a novel effective therapy. The aim of this study was to investigate the efficacy of regorafenib on an ES tumor in a patient-derived orthotopic xenograft (PDOX) model.
Methods
The ES PDOX models were established orthotopically in the right chest wall of nude mice to match the site of the tumor in the donor patient. The ES PDOX models were randomized into three groups (G) when the tumor volume reached 75 mm3: G1: untreated control; G2: doxorubicin (DOX) (i.p., 3 mg/kg, weekly, 2 weeks); G3: regorafenib (REG) (p.o., 30 mg/kg, daily, 2 weeks). Tumor volume and body weight were measured twice a week. All mice were sacrificed on day 15.
Results
DOX was ineffective compared to the control group (P = 0.229). REG regressed the tumor size (P < 0.001 and P < 0.001, relative to control and DOX, respectively).
Conclusions
Our findings suggest that REG has clinical potential for ES patients whose tumors respond to REG in a PDOX model.