Therapeutic Antibody Targeting Tumor- and Osteoblastic Niche-Derived Jagged1 Sensitizes Bone Metastasis to Chemotherapy

Cancer Cell. 2017 Dec 11;32(6):731-747.e6. doi: 10.1016/j.ccell.2017.11.002.

Abstract

Bone metastasis is a major health threat to breast cancer patients. Tumor-derived Jagged1 represents a central node in mediating tumor-stromal interactions that promote osteolytic bone metastasis. Here, we report the development of a highly effective fully human monoclonal antibody against Jagged1 (clone 15D11). In addition to its inhibitory effect on bone metastasis of Jagged1-expressing tumor cells, 15D11 dramatically sensitizes bone metastasis to chemotherapy, which induces Jagged1 expression in osteoblasts to provide a survival niche for cancer cells. We further confirm the bone metastasis-promoting function of osteoblast-derived Jagged1 using osteoblast-specific Jagged1 transgenic mouse model. These findings establish 15D11 as a potential therapeutic agent for the prevention or treatment of bone metastasis.

Keywords: Jagged1; bone metastasis; breast cancer; chemoresistance; neutralizing antibody; osteoblastic niche; osteoblasts.

MeSH terms

  • Animals
  • Antibodies, Monoclonal / pharmacology*
  • Antineoplastic Agents / pharmacology*
  • Bone Neoplasms / drug therapy*
  • Bone Neoplasms / secondary*
  • Humans
  • Jagged-1 Protein / antagonists & inhibitors*
  • Mice
  • Mice, Transgenic
  • Osteoblasts / drug effects
  • Xenograft Model Antitumor Assays

Substances

  • Antibodies, Monoclonal
  • Antineoplastic Agents
  • Jagged-1 Protein