|
|||||
|
|
Basic fibroblast growth factor promotes doxorubicin resistance in chondrosarcoma cells by affecting XRCC5 expression |
|
| Authors: | Ming-Ju Hsieh Cheng Huang Chia-Chieh Lin Chih-Hsin Tang Chih-Yang Lin I-Neng Lee Hsiu-Chen Huang Jui-Chieh Chen |
| Affiliation: | 1. Oral Cancer Research Center, Changhua Christian Hospital, Changhua, Taiwan Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan Department of Holistic Wellness, Mingdao University, Changhua, Taiwan;2. Department of Biotechnology and Laboratory Science in Medicine, National Yang-Ming University, Taipei, Taiwan Department of Earth and Life Sciences, University of Taipei, Taipei, Taiwan;3. Oral Cancer Research Center, Changhua Christian Hospital, Changhua, Taiwan;4. Department of Biotechnology, College of Health Science, Asia University, Taichung, Taiwan Department of Pharmacology, School of Medicine, China Medical University, Taichung, Taiwan Graduate Institute of Biomedical Science, China Medical University, Taichung, Taiwan Chinese Medicine Research Center, China Medical University, Taichung, Taiwan;5. Department of Medicine, Mackay Medical College, New Taipei City, Taiwan;6. Department of Medical Research, Chang Gung Memorial Hospital, Chiayi, Taiwan;7. Department of Applied Science, National Tsing Hua University, South Campus, Hsinchu, Taiwan;8. Department of Biochemical Science and Technology, National Chiayi University, Chiayi, Taiwan |
| Abstract: | Chondrosarcoma is the second most common form of bone cancer and is characterized by its ability to produce an extracellular matrix of the cartilage. High-grade chondrosarcoma is highly aggressive and can metastasize to other parts of the body. Chondrosarcoma is resistant to both conventional chemotherapy and radiotherapy; hence, the current main treatment is still surgical resection. Doxorubicin (Dox) has been shown to significantly improve patient survival compared with untreated chondrosarcoma. However, for patients with metastasis, surgical resection alone can hardly treat them. In addition, drug resistance is one of the leading causes of death in patients with chondrosarcoma. Secreted proteins can mediate cell-cell interactions in the cancer microenvironment, which may be associated with the development of drug resistance. In the present study, chondrosarcoma cells were treated with Dox, the conditioned medium was then collected and changes in secreted proteins were analyzed using the antibody array. Results showed that the Dox-treated group had the highest secretion of basic fibroblast growth factor (bFGF), indicating the effect of bFGF on Dox sensitivity in chondrosarcoma. Furthermore, lentiviral-mediated knockdown and treatment of exogenous recombinant protein were employed to further investigate the effect of bFGF on Dox resistance. Results demonstrated that bFGF can promote the expression of X-ray repair cross-complementing protein 5 (XRCC5), leading to Dox resistance. Secreted bFGF is likely to be detected in serum, in addition to being a biomarker for predicting Dox resistance, the combination of Dox and bFGF/XRCC5 blockers may be a new therapeutic strategy to improve the efficacy of Dox in future. |
| Keywords: | basic fibroblast growth factor bone cancer chondrosarcoma doxorubicin drug resistance X-ray repair cross-complementing protein 5 |