ArticleActa pharmacologica Sinica2026
ATM promotes bone metastatic propensity of breast cancer by inducing osteoclastogenesis via the NFκB-CCL2 pathway.
Article in Acta pharmacologica Sinica, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- Lipidome as a ferroptotic rheostat in cholangiocarcinoma: A proposed model and its current evidence base.Molecular biology reports · 2026Review
- Dimethyl itaconate attenuates dextran sulfate sodium-induced ulcerative colitis in BALB/c mice: investigations on the TXNIP/NLRP3 inflammasome signaling pathway.Inflammopharmacology · 2026Article
- The mechanistic basis and cellular functions of UFMylation.Nature reviews. Molecular cell biology · 2026Review
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9 authors.
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Abstract
Metastasis in breast cancer frequently spreads to the bones, significantly impacting patient outcomes and escalating mortality rates. The ataxia-telangiectasia mutated (ATM) kinase plays a pivotal role in regulating the DNA damage response (DDR) and has been linked to the invasion and spread of breast cancer. In this study we investigated the regulatory mechanisms of ATM in bone metastasis of breast cancer. The bone metastases models were constructed in female nude mice: The MDA-MB-231 tumor model was generated by implanting luciferase-tagged MDA-MB-231 cells into the left hind tibia and intra-caudal artery. For the SK-BR-3 tumor model, luciferase-tagged SK-BR-3 cells were injected through the intra-caudal artery. By conducting bioinformatics analyses and in vitro and in vivo experiments, we found that ATM expression was markedly elevated in bone metastasis samples compared to liver, lung or skin metastases. We demonstrated that ATM boosted the migrative and invasive abilities and pre-osteoclast differentiation of MDA-MB-231 and SK-BR-3 cell lines via expression of CCL2, an osteoclast-related cytokine. The regulation of ATM on CCL2 was found to be NFκB dependent. In vivo experiments confirmed that ATM knockout (ATM KO) or treatment with small-molecule ATM inhibitor KU55933 markedly inhibited osteoclastogenesis of SK-BR-3 cells and the progression of breast cancer bone metastasis. Our results underscore the pivotal role of ATM in regulating NFκB-CCL2 expression and promoting the progression of breast cancer bone metastasis.
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