| Literature DB >> 32920118 |
Megan E Roche1, Zhao Lin1, Diana Whitaker-Menezes1, Tingting Zhan2, Karoly Szuhai3, Judith V M G Bovee3, John A Abraham4, Wei Jiang5, Ubaldo Martinez-Outschoorn6, Atrayee Basu-Mallick7.
Abstract
Chondrosarcoma is the second most common primary bone malignancy, representing one fourth of all primary bone sarcomas. It is typically resistant to radiation and chemotherapy treatments. However, the molecular mechanisms that contribute to cancer aggressiveness in chondrosarcomas remain poorly characterized. Here, we studied the role of mitochondrial transporters in chondrosarcoma aggressiveness including chemotherapy resistance. Histological grade along with stage are the most important prognostic biomarkers in chondrosarcoma. We found that high-grade human chondrosarcoma tumors have higher expression of the mitochondrial protein, translocase of the outer mitochondrial membrane complex subunit 20 (TOMM20), compared to low-grade tumors. TOMM20 overexpression in human chondrosarcoma cells induces chondrosarcoma tumor growth in vivo. TOMM20 drives proliferation, resistance to apoptosis and chemotherapy resistance. Also, TOMM20 induces markers of epithelial to mesenchymal transition (EMT) and metabolic reprogramming in these mesenchymal tumors. In conclusion, TOMM20 drives chondrosarcoma aggressiveness and resistance to chemotherapy.Entities:
Keywords: Apoptosis; Chemotherapy resistance; Chondrosarcoma; Mitochondria; Proliferation
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Year: 2020 PMID： 32920118 PMCID： PMC7680391 DOI： 10.1016/j.bbadis.2020.165962
Source DB: PubMed Journal: Biochim Biophys Acta Mol Basis Dis ISSN： 0925-4439 Impact factor: 5.187