Abstract:
:Anaplastic thyroid carcinoma (ATC) is a rare type of thyroid carcinoma with a poor prognosis. Thus, suitable preclinical tumor models are required for the development of new ATC therapies. In the present study, orthotopic tumor xenograft models were established using ATC cell lines and SCID mice, and tumor invasion and the effects of anticancer drugs were evaluated using positron emission tomography/computed tomography (PET/CT) to repeatedly and non‑invasively monitor these models. Three ATC cell lines (8305c, 8505c, and ACT‑1) were used. Their sensitivities to two anticancer drugs (paclitaxel and lenvatinib) were investigated. The 8505c cell line was orthotopically implanted into SCID mice, which were then divided into three groups: No chemotherapy, paclitaxel (5 mg/kg, administered intraperitoneally, every week), and lenvatinib (5 mg/kg, oral route, every day) groups. PET/CT was performed and tumor growth and the effects of anticancer drugs based on tumor volume and fludeoxyglucose (FDG) uptake were evaluated. 8505c cells exhibited the highest sensitivity to the anticancer drugs. In mice implanted with 8505c cells, continuous increases in FDG uptake associated with tumor growth were detected on PET/CT in the group that received no chemotherapy. The tumor volume and FDG uptake increased by 91.5‑ and 2.4‑fold, respectively, within 2 weeks. The increase observed in tumor volume was 26.9‑ and 12.2‑fold in the paclitaxel and lenvatinib groups, respectively, within 2 weeks. Furthermore, the increase in FDG uptake was 1.8 and 1.6‑fold in the paclitaxel and lenvatinib groups, respectively, within 2 weeks. In our orthotopic SCID mouse model, tumor growth and the effects of anticancer drugs were repeatedly and non‑invasively monitored using PET/CT. The present method is useful for the development of new ATC treatments.
journal_name
Oncol Repjournal_title
Oncology reportsauthors
Aoyama M,Takizawa H,Otani T,Inoue S,Kawakita N,Tsuboi M,Bando Y,Uehara H,Kondo K,Tangoku Adoi
10.3892/or.2020.7720subject
Has Abstractpub_date
2020-10-01 00:00:00pages
1709-1716issue
4eissn
1021-335Xissn
1791-2431journal_volume
44pub_type
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