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- W2745189070 abstract "Tissue matrix remodeling and fibrosis leading to loss of pulmonary arterial and right ventricular compliance are important features of both experimental and clinical pulmonary hypertension (PH). We have previously reported that transglutaminase 2 (TG2) is involved in PH development while others have shown it to be a cross-linking enzyme that participates in remodeling of extracellular matrix in fibrotic diseases in general. In the present studies, we used a mouse model of experimental PH (Sugen 5416 and hypoxia; SuHypoxia) and cultured primary human cardiac and pulmonary artery adventitial fibroblasts to evaluate the relationship of TG2 to the processes of fibrosis, protein cross-linking, extracellular matrix collagen accumulation, and fibroblast-to-myofibroblast transformation. We report here that TG2 expression and activity as measured by serotonylated fibronectin and protein cross-linking activity along with fibrogenic markers are significantly elevated in lungs and right ventricles of SuHypoxic mice with PH. Similarly, TG2 expression and activity, protein cross-linking activity, and fibrogenic markers are significantly increased in cultured cardiac and pulmonary artery adventitial fibroblasts in response to hypoxia exposure. Pharmacological inhibition of TG2 activity with ERW1041E significantly reduced hypoxia-induced cross-linking activity and synthesis of collagen 1 and α-smooth muscle actin in both the in vivo and in vitro studies. TG2 short interfering RNA had a similar effect in vitro. Our results suggest that TG2 plays an important role in hypoxia-induced pulmonary and right ventricular tissue matrix remodeling in the development of PH." @default.
- W2745189070 created "2017-08-17" @default.
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- W2745189070 date "2017-11-01" @default.
- W2745189070 modified "2023-10-14" @default.
- W2745189070 title "Transglutaminase 2 in pulmonary and cardiac tissue remodeling in experimental pulmonary hypertension" @default.
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- W2745189070 doi "https://doi.org/10.1152/ajplung.00170.2017" @default.
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