1720-Osteoclasts Drive Dural Metastasis

Dural metastasis, a severe late-stage complication of advanced cancers like breast and lung malignancies, creates unique pathological changes by infiltrating the dura mater and causing localized cranial bone erosion. Researchers utilizing a specialized mouse model discovered that meningeal lymphatic vessels suffer significant structural destruction and drainage failure during this process. Furthermore, single-cell RNA sequencing revealed that the tumor microenvironment becomes heavily suppressed by the unexpected presence of osteoclasts that damage these lymphatic pathways and induce T-cell exhaustion. Administering the bisphosphonate zoledronic acid effectively inhibits these osteoclasts, which successfully restores lymphatic structure and fluid drainage while reversing immune suppression. Ultimately, this therapeutic restoration reactivates CD8+ T-cell-dependent immunity, significantly slowing disease progression and improving survival outcomes in affected subjects.

References:

• Zeng R, Zhao J, Peng H, et al. Osteoclasts intercept meningeal lymphatic paths for dural metastasis[J]. Nature, 2026: 1-11.