Brown, H.K., Allocca, G., Ottewell, P.D. orcid.org/0000-0002-4826-0771 et al. (5 more authors) (2018) Parathyroid Hormone (PTH) Increases Skeletal Tumour Growth and Alters Tumour Distribution in an In Vivo Model of Breast Cancer. International Journal of Molecular Sciences, 19 (10). ISSN 1661-6596
Abstract
Breast cancer cells colonize the skeleton by homing to specific niches, but the involvement of osteoblasts in tumour cell seeding, colonization, and progression is unknown. We used an in vivo model to determine how increasing the number of cells of the osteoblast lineage with parathyroid hormone (PTH) modified subsequent skeletal colonization by breast cancer cells. BALB/c nude mice were injected for five consecutive days with PBS (control) or PTH and then injected with DiD-labelled breast cancer cells via the intra-cardiac route. Effects of PTH on the bone microenvironment and tumour cell colonization and growth was analyzed using bioluminescence imaging, two-photon microscopy, and histological analysis. PTH treatment caused a significant, transient increase in osteoblast numbers compared to control, whereas bone volume/structure in the tibia was unaffected. There were no differences in the number of tumour cells seeding to the tibias, or in the number of tumours in the hind legs, between the control and PTH group. However, animals pre-treated with PTH had a significantly higher number of tumour colonies distributed throughout skeletal sites outside the hind limbs. This is the first demonstration that PTH-induced stimulation of osteoblastic cells may result in alternative skeletal sites becoming available for breast cancer cell colonization.
Metadata
Authors/Creators: |
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Copyright, Publisher and Additional Information: | This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0). |
Keywords: | bone metastasis; bone metastatic niche; breast cancer; osteoblast; parathyroid hormone |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Sheffield Teaching Hospitals |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 10 Oct 2018 15:39 |
Last Modified: | 10 Oct 2018 15:39 |
Published Version: | https://doi.org/10.3390/ijms19102920 |
Status: | Published online |
Publisher: | MDPI |
Refereed: | Yes |
Identification Number: | https://doi.org/10.3390/ijms19102920 |
Related URLs: |