Cancer cells deploy lipocalin-2 to collect limiting iron in leptomeningeal metastasis.
Cancer cells deploy lipocalin-2 to collect limiting iron in leptomeningeal metastasis.
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DOI:
10.1126/science.aaz2193
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发表时间:
2020-07-17
期刊:
影响因子:
--
通讯作者:
Boire A
中科院分区:
文献类型:
--
作者:
Chi Y;Remsik J;Kiseliovas V;Derderian C;Sener U;Alghader M;Saadeh F;Nikishina K;Bale T;Iacobuzio-Donahue C;Thomas T;Pe'er D;Mazutis L;Boire A
The tumor microenvironment plays a critical regulatory role in cancer progression, especially in central nervous system metastases. Cancer cells within the spinal fluid-filled leptomeninges (leptomeningeal metastases, LM) face substantial microenvironmental challenges, including inflammation and sparse micronutrients. To investigate the mechanism by which cancer cells overcome these constraints, we subjected cerebrospinal spinal fluid (CSF) from patients with LM to single-cell RNA-Seq. Cancer cells, but not macrophages, within the CSF express the iron-binding protein lipocalin-2 (LCN2) and its receptor SCL22A17. These macrophages generate inflammatory cytokines that induce cancer cell LCN2 expression, but do not generate LCN2 themselves. In mouse models of LM, cancer cell growth is supported by the LCN2/SLC22A17 system and is inhibited by iron chelation therapy. Thus, cancer cells appear to survive in the CSF by outcompeting macrophages for iron.
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