Targeting glucose metabolism in chondrosarcoma cells enhances the sensitivity to doxorubicin through the inhibition of lactate dehydrogenase-A.
Chondrosarcoma is a malignant cartilage-forming cancer composed of cells derived from transformed cells that produce cartilage. Conventional chemotherapy and radiotherapy have very limited efficacy in patients with advanced chondrosarcoma. In the present study, we reported a novel therapeutic approach in the treatment of chondrosarcoma cells. We detected that lactate dehydrogenase-A (LDHA) is highly active in chondrosarcoma cells and chondrosarcoma patient samples compared with normal chondrocyte cell lines and primary human chondrocyte. Moreover, chondrosarcoma cells exhibited elevated levels of LDHA expression under doxorubicin treatment. To further explore the mechanisms, we generated doxorubicin-resistant cells from SW1353 chondrosarcoma cell line. Notably, the activity and expression of LDHA are upregulated in doxorubicin-resistant cells. Moreover, our data showed a strong correlation between glucose metabolism and doxorubicin resistance in chondrosarcoma cells; doxorubicin-resistant cells displayed highly activated glucose metabolism and depended more on glucose supply. Finally, we reported a synergistic effect produced by incorporating doxorubicin with glycolysis inhibitors-oxamate in the combined treatment of chondrosarcoma cells in vitro and in vivo. In summary, the present study may aid in the development of new approaches using the combination of chemotherapeutic agents for the treatment of chondrosarcoma patients.
Department of Orthopaedics, The 101st Hospital of the People's Liberation Army, Wuxi, Jiangsu 214044, P.R. China.
Guojun
G
Hua
Department of Orthopaedics, The 101st Hospital of the People's Liberation Army, Wuxi, Jiangsu 214044, P.R. China.
Yunpeng
Y
Liu
Department of Hematology and Oncology, The 101st Hospital of the People's Liberation Army, Wuxi, Jiangsu 214044, P.R. China.
Xiangyong
X
Li
Department of Orthopaedics, The 101st Hospital of the People's Liberation Army, Wuxi, Jiangsu 214044, P.R. China.
Peirong
P
Xu
Department of Orthopaedics, The 101st Hospital of the People's Liberation Army, Wuxi, Jiangsu 214044, P.R. China.
Yuchun
Y
Luo
D001859:Bone Neoplasms / Q000188:drug therapy / Q000235:genetics* / Q000473:pathology; D045744:Cell Line, Tumor; D002813:Chondrosarcoma / Q000188:drug therapy / Q000235:genetics* / Q000473:pathology; D004317:Doxorubicin / Q000008:administration & dosage; D019008:Drug Resistance, Neoplasm / Q000235:genetics*; D015972:Gene Expression Regulation, Neoplastic; D005947:Glucose / Q000378:metabolism; D006801:Humans; D007527:Isoenzymes / Q000037:antagonists & inhibitors / Q000096:biosynthesis; D007770:L-Lactate Dehydrogenase / Q000037:antagonists & inhibitors / Q000096:biosynthesis*; D000080864:Lactate Dehydrogenase 5
D007527:Isoenzymes; D004317:Doxorubicin; D007770:L-Lactate Dehydrogenase; D000080864:Lactate Dehydrogenase 5; D005947:Glucose