Pharmacological evidence for the bone-autonomous contribution of the NFκB/ß-catenin axis to breast cancer related osteolysis.
Cancer Lett
; 410: 180-190, 2017 12 01.
Article
en En
| MEDLINE
| ID: mdl-28965856
ABSTRACT
The NFκB signaling pathway is implicated in breast cancer and bone metastasis. However, the bone-autonomous contribution of NFκB to breast cancer-induced osteolysis is poorly understood. Here, we report that pretreatment of osteoblasts with the sesquiterpene lactone Parthenolide (PTN), a verified NFκB inhibitor, prior to exposure to conditioned medium from human and mouse breast cancer cell lines enhanced osteoblast differentiation and reduced osteoblast ability to stimulate osteoclastogenesis. PTN prevented breast cancer-induced osteoclast formation and reduced the ability of breast cancer cells to prolong osteoclast survival and to inhibit osteoclast apoptosis. In vivo, administration of PTN in immuno-competent mice reduced osteolytic bone loss and skeletal tumour growth following injection of the syngeneic 4T1-BT1 cells and reduced local osteolysis caused by conditioned medium from human and mouse osteotropic breast cancer cell lines. Mechanistic studies revealed that NFκB inhibition by PTN in osteoblasts and osteoclasts was accompanied by a significant increase in ß-catenin activation and expression. Collectively, these results raise the possibility that combined targeting of NFκB and ß-catenin signalling in the tumour microenvironment may be of value in the treatment of breast cancer related osteolysis.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Contexto en salud:
6_ODS3_enfermedades_notrasmisibles
Problema de salud:
6_breast_cancer
/
6_other_malignant_neoplasms
Asunto principal:
Osteoblastos
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Osteoclastos
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Osteólisis
/
Sesquiterpenos
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Neoplasias Óseas
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Neoplasias de la Mama
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FN-kappa B
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Beta Catenina
Límite:
Animals
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Female
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Humans
Idioma:
En
Revista:
Cancer Lett
Año:
2017
Tipo del documento:
Article
País de afiliación:
Reino Unido