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- W2938119062 abstract "Inflammatory monocytes have been shown to play key roles in cancer metastasis through promotion of tumor cell extravasation, growth, and angiogenesis. Monocyte recruitment to metastases is mediated primarily via the CCL2-CCR2 chemotactic axis. Thus, disruption of this axis represents an attractive therapeutic target for the treatment of metastatic disease. Losartan, a type I angiotensin II receptor (AT1R) antagonist, has been previously shown to have immunomodulatory actions involving monocyte and macrophage activity. However, the exact mechanisms accounting for these effects have not been fully elucidated. Therefore, we investigated the effects of losartan and its primary metabolite on CCL2-mediated monocyte recruitment and CCR2 receptor function using mouse tumor models and in vitro human monocyte cultures. We show, in this study, that losartan and its metabolite potently inhibit monocyte recruitment through the noncompetitive inhibition of CCL2-induced ERK1/2 activation, independent of AT1R activity. Studies in experimental metastasis models demonstrated that losartan treatment significantly reduced the metastatic burden in mice, an effect associated with a significant decrease in CD11b+/Ly6C+-recruited monocytes in the lungs. Collectively, these results indicate that losartan can exert antimetastatic activity by inhibiting CCR2 signaling and suppressing monocyte recruitment and therefore suggest that losartan (and potentially other AT1R blocker drugs) could be repurposed for use in cancer immunotherapy." @default.
- W2938119062 created "2019-04-25" @default.
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- W2938119062 date "2019-04-10" @default.
- W2938119062 modified "2023-10-14" @default.
- W2938119062 title "The Angiotensin Receptor Blocker Losartan Suppresses Growth of Pulmonary Metastases via AT1R-Independent Inhibition of CCR2 Signaling and Monocyte Recruitment" @default.
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- W2938119062 doi "https://doi.org/10.4049/jimmunol.1800619" @default.
- W2938119062 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6504574" @default.
- W2938119062 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30971441" @default.
- W2938119062 hasPublicationYear "2019" @default.
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