A chemokine regulatory loop induces cholesterol synthesis in lung-colonizing triple-negative breast cancer cells to fuel metastatic growth.

A chemokine regulatory loop induces cholesterol synthesis in lung-colonizing triple-negative breast cancer cells to fuel metastatic growth.
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DOI:
10.1016/j.ymthe.2021.07.003
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发表时间:
2022-02-02
期刊:
Molecular therapy : the journal of the American Society of Gene Therapy
影响因子:
--
通讯作者:
Cui X
Cui X
中科院分区:
其他
文献类型:
--
作者:
Han B;Alonso-Valenteen F;Wang Z;Deng N;Lee TY;Gao B;Zhang Y;Xu Y;Zhang X;Billet S;Fan X;Shiao S;Bhowmick N;Medina-Kauwe L;Giuliano A;Cui X

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Triple-negative breast cancer (TNBC) has a high propensity for organ-specific metastasis. However, the underlying mechanisms are not well understood. Here we show that the primary TNBC tumor-derived C-X-C motif chemokines 1/2/8 (CXCL1/2/8) stimulate lung-resident fibroblasts to produce the C-C motif chemokines 2/7 (CCL2/7), which, in turn, activate cholesterol synthesis in lung-colonizing TNBC cells and induce angiogenesis at lung metastatic sites. Inhibiting cholesterol synthesis in lung-colonizing breast tumor cells by pulmonary administration of simvastatin-carrying HER3-targeting nanoparticles reduces angiogenesis and growth of lung metastases in a syngeneic TNBC mouse model. Our findings reveal a novel, chemokine-regulated mechanism for the cholesterol synthesis pathway and a critical role of metastatic site-specific cholesterol synthesis in the pulmonary tropism of TNBC metastasis. The study has implications for the unresolved epidemiological observation that use of cholesterol-lowering drugs has no effect on breast cancer incidence but can unexpectedly reduce breast cancer mortality, suggesting interventions of cholesterol synthesis in lung metastases as an effective treatment to improve survival in individuals with TNBC. Han et al. discovered local cholesterol synthesis activation in lung-colonizing triple-negative breast cancer (TNBC) cells. They provide evidence that blockade of cholesterol synthesis in TNBC cells at metastatic sites is a potential therapeutic approach for treatment or prevention of distant recurrence in TNBC.
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