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• W3086566617 abstract "Abnormally activated vascular smooth muscle cells are key factors in pulmonary artery remodelling (PAR) and pulmonary artery hypertension (PAH). Keratin 1 is involved in inflammatory diseases; however, its role in PAH is unknown. We speculated that keratin 1 could regulate PASMCs and prevent PAH.Rats were exposed to hypoxia (10% O2 ) or MCT (50 mg/kg, intraperitoneal injection) or treated with AAV6 virus. PAR was measured through HE and Masson staining. PASMC activities were measured using MTS assay, EdU and Western blot analyses after cell knockdown with siRNAs or overexpression with Krt1 vectors.1. Hypoxic PAR was associated with a decrease in keratin 1, especially in PASMCs. 2. Keratin 1 knockdown led to cell proliferation, migration and contraction to synthetic transformation, while keratin 1 overexpression attenuated hypoxia-induced changes in PASMCs. 3. Decreased keratin 1 induced TLR7 upregulation and mediated increases in the inflammatory factors S100a8 and S100a9. 4. Keratin 1 overexpression reduced the inflammatory factor expression induced by TLR7 activation. 5. Further studies demonstrated that keratin 1 expression was negatively correlated with pulmonary vascular pressure following prolonged hypoxia. 6. Pre-treatment with keratin 1 decreased pulmonary artery pressure and the right heart hypertrophy index and alleviated PAR in two model rats. 7. Keratin 1 exhibited a hypermethylation status in hypoxic pulmonary arteries in the sequencing. Hypoxia-induced decrease in keratin 1 expression was associated with Dnmt1 upregulation induced by YY1 downregulation in PASMCs.This study suggests that keratin 1 regulates PASMC expansion and has a preventive effect on PAH." @default.
• W3086566617 created "2020-09-21" @default.
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• W3086566617 date "2020-09-24" @default.
• W3086566617 modified "2023-10-15" @default.
• W3086566617 title "Keratin 1 attenuates hypoxic pulmonary artery hypertension by suppressing pulmonary artery media smooth muscle expansion" @default.
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• W3086566617 doi "https://doi.org/10.1111/apha.13558" @default.
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• W3086566617 hasPublicationYear "2020" @default.
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