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- W4307435120 abstract "Our previous study showed that triggering receptors expressed on myeloid cell-1 (TREM-1) was upregulated in bleomycin (BLM)-induced pulmonary fibrosis (PF) mouse model. However, the role of TREM-1 in the development of PF and its underlying mechanism remain unclear. Herein, we report that the prophylactical blockade of TREM-1 using a decoy peptide dodecapeptide (LR12) exerted protective effects against BLM-induced PF in mice, with a higher survival rate, attenuated tissue injury, and less extracellular matrix deposition. Interestingly, therapeutic blockade of TREM-1 at the early stage of fibrosis also attenuated BLM-induced PF, suggesting a non-inflammatory effect. More importantly, we observed that TREM-1 blockade with LR12 significantly reduced the expression of the senescence-relative protein, including p16, p21, p53, and γ-H2AX in the lungs of PF mice. Notably, TREM-1 was upregulated in alveolar epithelial cells (AECs) and correlated with the levels of senescence markers in BLM-treated mice. In vitro, activating TREM-1 with an agonistic antibody exacerbated BLM-induced senescence in MLE12 cells, a murine AEC cell line. Furthermore, prophylactic or therapeutic blockade of TREM-1 protected MLE12 cells from senescence induced by BLM or H2O2. In conclusion, our findings elucidate a pro-fibrotic effect of TREM-1 by inducing AECs senescence in PF, providing a potential strategy for fibrotic disease treatment." @default.
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- W4307435120 date "2022-12-01" @default.
- W4307435120 modified "2023-09-26" @default.
- W4307435120 title "TREM-1 exacerbates bleomycin-induced pulmonary fibrosis by aggravating alveolar epithelial cell senescence in mice" @default.
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- W4307435120 doi "https://doi.org/10.1016/j.intimp.2022.109339" @default.
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