title: Quetiapine inhibits osteoclastogenesis and prevents human breast cancer-induced bone loss through suppression of the RANKL-mediated MAPK and NF-κB signaling pathways.
abstract: Bone loss is one of the major complications of advanced cancers such as breast cancer, prostate cancer, and lung cancer. Extensive research has revealed that the receptor activator of NF-κB ligand (RANKL), which is considered to be a key factor in osteoclast differentiation, plays an important role in cancer-associated bone resorption. Therefore, agents that can suppress this bone loss have therapeutic potential. In this study, we detected whether quetiapine (QUE), a commonly used atypical antipsychotic drug, can inhibit RANKL-induced osteoclast differentiation in vitro and prevent human breast cancer-induced bone loss in vivo. RAW 264.7 cells and bone marrow-derived macrophages (BMMs) were used to detect inhibitory effect of QUE on osteoclastogenesis in vitro. Mouse model of breast cancer metastasis to bone was used to test suppressive effect of QUE on breast cancer-induced bone loss in vivo. Our results show that QUE can inhibit RANKL-induced osteoclast differentiation from RAW 264.7 cells and BMMs without signs of cytotoxicity. Moreover, QUE reduced the occurrence of MDA-MB-231 cell-induced osteolytic bone loss by suppressing the differentiation of osteoclasts. Finally, molecular analysis revealed that it is by inhibiting RANKL-mediated MAPK and NF-κB signaling pathways that QUE suppressed the osteoclast differentiation. We demonstrate, for the first time, the novel suppressive effects of QUE on RANKL-induced osteoclast differentiation in vitro and human breast cancer-induced bone loss in vivo, suggesting that QUE may be a potential therapeutic drug for osteolysis treatment.
authors: Department of Orthopaedics, Xinqiao Hospital, Third Military Medical University, Chongqing, 400037, China.
authors: Hongkai
authors: H
authors: Wang
authors: Weiwei
authors: W
authors: Shen
authors: Xu
authors: X
authors: Hu
authors: Ying
authors: Y
authors: Zhang
authors: Yunyun
authors: Y
authors: Zhuo
authors: Tao
authors: T
authors: Li
authors: Feng
authors: F
authors: Mei
authors: Xinmin
authors: X
authors: Li
authors: Lan
authors: L
authors: Xiao
authors: Tongwei
authors: T
authors: Chu
mesh_terms: D000818:Animals; D001862:Bone Resorption / Q000150:complications / Q000235:genetics* / Q000473:pathology; D001943:Breast Neoplasms / Q000150:complications / Q000188:drug therapy* / Q000235:genetics / Q000473:pathology; D002454:Cell Differentiation / Q000187:drug effects; D045744:Cell Line, Tumor; D003987:Dibenzothiazepines / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D020935:MAP Kinase Signaling System / Q000187:drug effects; D008264:Macrophages / Q000187:drug effects / Q000473:pathology; D051379:Mice; D016328:NF-kappa B / Q000235:genetics; D010010:Osteoclasts / Q000187:drug effects / Q000473:pathology; D000069348:Quetiapine Fumarate; D053245:RANK Ligand / Q000037:antagonists & inhibitors / Q000235:genetics*; D015398:Signal Transduction / Q000187:drug effects
chemical_list: D003987:Dibenzothiazepines; D016328:NF-kappa B; D053245:RANK Ligand; C505688:TNFSF11 protein, human; D000069348:Quetiapine Fumarate