Abstract
The feasibility of a short-term, three-dimensional (3D) culture–based drug sensitivity test (DST) for surgically resected malignant bone tumors, including osteosarcoma (OS), was evaluated utilizing two OS cell line (KCS8 or KCS9)–derived xenograft (CDX) models. Twenty-three (KCS8) or 39 (KCS9) of 60 tested drugs were likely effective in OS cells derived from a cell line before xenografting. Fewer drugs (19: KCS8, 26: KCS9) were selected as effective drugs in cells derived from a CDX tumor, although the drug sensitivities of 60 drugs significantly correlated between both types of samples. The drug sensitivity of a CDX tumor was not significantly altered after the depletion of non-tumorous components in the sample. In a surgically resected metastatic tumor obtained from a patient with OS, for whom a cancer genome profiling test detected a pathogenic PIK3CA mutation, DST identified mTOR and AKT inhibitors as effective drugs. Of two CDX and six clinical samples of OS and Ewing’s sarcoma, DST identified proteasome inhibitors (bortezomib, carfilzomib) and CEP-701 as potentially effective drugs in common. This unique method of in vitro drug testing using 3D-cell cultures is feasible in surgically resected tissues of metastatic malignant bone tumors.
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This work was supported by a Grant for Practical Research for Innovative Cancer Control from the Japan Agency for Medical Research and Development (AMED) (20cm0106509h9905).
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This study has been approved by the ethics committee of Kanagawa Children’s Medical Center (No. 113-8). Written informed consents to be enrolled in the study including cell culture to establish cell lines were obtained from participants in this study or their guardians. Animal experiments have been approved by the ethics committee of Kanagawa Caner Center (No. 04-02 and No. 16-06) and were performed by following Fundamental Guidelines for Proper Conduct of Animal Experiment and Related Activities in Academic Research Institutions under the jurisdiction of the Ministry of Education, Culture, Sports, Science and Technology.
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13577_2023_982_MOESM1_ESM.tif
Supplementary file1 (TIF 144 KB) Supplemental Figure 1. Karyotype analysis of KCS8 and KCS9. Karyotype analysis of osteosarcoma cell lines revealed hyperdiploidy with 66 or 60 chromosomes in KCS8 or KCS9, respectively
13577_2023_982_MOESM2_ESM.tif
Supplementary file2 (TIF 602 KB) Supplemental Figure 2. Immunohistochemistry of KCS8 and KCS9. By immunohistochemistry, both KCS8 and KCS9 were nuclear positive for RUNX2
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Goto, H., Ohtsu, T., Ito, M. et al. A short-term three dimensional culture-based drug sensitivity test is feasible for malignant bone tumors. Human Cell 36, 2152–2161 (2023). https://doi.org/10.1007/s13577-023-00982-8
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DOI: https://doi.org/10.1007/s13577-023-00982-8