Dura immunity configures leptomeningeal metastasis immunosuppression for cerebrospinal fluid barrier invasion

Jiaxu Zhao, Rui Zeng, Xiaohui Li, Ying Lu, Zuoyun Wang, Haibao Peng, Hao Chen, Minjie Fu, Ye Zhang, Yang Huang, Wenhan Chen, Xin Wang, Yun Guan, Wei Han, Ruofan Huang, Chengjun Yao, Zhiyong Qin, Lingchao Chen, Liang Chen, Xue FengHanting Yang, Patrícia M.R. Pereira, Xuemei Tong, Bin Li, Qiangqiang Zhang, Yudan Chi

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The cerebrospinal fluid (CSF) border accommodates diverse immune cells that permit peripheral cell immunosurveillance. However, the intricate interactions between CSF immune cells and infiltrating cancer cells remain poorly understood. Here we use fate mapping, longitudinal time-lapse imaging and multiomics technologies to investigate the precise origin, cellular crosstalk and molecular landscape of macrophages that contribute to leptomeningeal metastasis (LM) progression. Mechanically, we find that dura-derived LM-associated macrophages (dLAMs) migrate into the CSF in a matrix metalloproteinase 14 (MMP14)-dependent manner. Furthermore, we identify that dLAMs critically require the presence of secreted phosphoprotein 1 (SPP1) in cancer cells for their recruitment, fostering an immunosuppressed microenvironment characterized by T cell exhaustion and inactivation. Conversely, inhibition of the SPP1–MMP14 axis can impede macrophages from bypassing the border barrier, prevent cancer cell growth and improve survival in LM mouse models. Our findings reveal an unexpectedly private source of innate immunity within the meningeal space, shed light on CSF barrier dysfunction dynamics and supply potential targets of clinical immunotherapy.

Original languageEnglish
Article numbere20212121
Pages (from-to)1940-1961
Number of pages22
JournalNature Cancer
Volume5
Issue number12
DOIs
StatePublished - Dec 2024

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