| First Author | Todd VM | Year | 2021 |
| Journal | Commun Biol | Volume | 4 |
| Issue | 1 | Pages | 1122 |
| PubMed ID | 34556788 | Mgi Jnum | J:312362 |
| Mgi Id | MGI:6784874 | Doi | 10.1038/s42003-021-02648-3 |
| Citation | Todd VM, et al. (2021) Hypoxia inducible factor signaling in breast tumors controls spontaneous tumor dissemination in a site-specific manner. Commun Biol 4(1):1122 |
| abstractText | Hypoxia is a common feature in tumors and induces signaling that promotes tumor cell survival, invasion, and metastasis, but the impact of hypoxia inducible factor (HIF) signaling in the primary tumor on dissemination to bone in particular remains unclear. To better understand the contributions of hypoxia inducible factor 1 alpha (HIF1alpha), HIF2alpha, and general HIF pathway activation in metastasis, we employ a PyMT-driven spontaneous murine mammary carcinoma model with mammary specific deletion of Hif1alpha, Hif2alpha, or von Hippel-Lindau factor (Vhl) using the Cre-lox system. Here we show that Hif1alpha or Hif2alpha deletion in the primary tumor decreases metastatic tumor burden in the bone marrow, while Vhl deletion increases bone tumor burden, as hypothesized. Unexpectedly, Hif1alpha deletion increases metastatic tumor burden in the lung, while deletion of Hif2alpha or Vhl does not affect pulmonary metastasis. Mice with Hif1alpha deleted tumors also exhibit reduced bone volume as measured by micro computed tomography, suggesting that disruption of the osteogenic niche may be involved in the preference for lung dissemination observed in this group. Thus, we reveal that HIF signaling in breast tumors controls tumor dissemination in a site-specific manner. |
