OBJECTIVE AND DESIGN: This study is designed to investigate the role of p38 MAPK in modulating human pulmonary artery endothelial cells (HPAECs) survival and tissue repair functions. METHODS: HPAECs (passage 8-12) were used for all experiments. Cells were treated with IL-1β (0.5 or 2 ng/ml) or p38 inhibitor (SB203580 or SB220025, 5 μM each). Cells were also transfected with 50 nM siRNAs. Cell length was measured using ImageJ software. Collagen gel contraction and wound close assay were performed to evaluate tissue repair functions. RESULTS: IL-1β activated p38 MAPK and induced morphologic change of HPAECs. The p38 inhibitors further augmented IL-1β-induced cell morphologic change, prevented cell death, and augmented collagen gel contraction. Suppression of p38α, γ, or δ, but not p38β resulted in cell morphologic alteration, and suppressing any one of p38 isoforms by siRNAs increased cell survival. Suppression of p38α or δ augmented gel contraction. While p38α suppression stimulated cell migration, suppressing the rest of three isoforms inhibit cell migration. Nuclear factor p65-siRNA blocked IL-1β-induced cell morphologic change, but did not affect p38 inhibitor-induced change. CONCLUSION: These findings suggest that p38 MAPK may negatively modulate tissue repair functions of endothelial cells via p65 independent pathway.
OBJECTIVE AND DESIGN: This study is designed to investigate the role of p38 MAPK in modulating human pulmonary artery endothelial cells (HPAECs) survival and tissue repair functions. METHODS: HPAECs (passage 8-12) were used for all experiments. Cells were treated with IL-1β (0.5 or 2 ng/ml) or p38 inhibitor (SB203580 or SB220025, 5 μM each). Cells were also transfected with 50 nM siRNAs. Cell length was measured using ImageJ software. Collagen gel contraction and wound close assay were performed to evaluate tissue repair functions. RESULTS: IL-1β activated p38 MAPK and induced morphologic change of HPAECs. The p38 inhibitors further augmented IL-1β-induced cell morphologic change, prevented cell death, and augmented collagen gel contraction. Suppression of p38α, γ, or δ, but not p38β resulted in cell morphologic alteration, and suppressing any one of p38 isoforms by siRNAs increased cell survival. Suppression of p38α or δ augmented gel contraction. While p38α suppression stimulated cell migration, suppressing the rest of three isoforms inhibit cell migration. Nuclear factor p65-siRNA blocked IL-1β-induced cell morphologic change, but did not affect p38 inhibitor-induced change. CONCLUSION: These findings suggest that p38 MAPK may negatively modulate tissue repair functions of endothelial cells via p65 independent pathway.
Authors: Chen Xu; Weina Liu; Xingji You; Kelycia Leimert; Krystyn Popowycz; Xin Fang; Stephen L Wood; Donna M Slater; Qianqian Sun; Hang Gu; David M Olson; Xin Ni Journal: Mol Hum Reprod Date: 2015-04-16 Impact factor: 4.025
Authors: Ta-Chun Hang; Nathan C Tedford; Raven J Reddy; Tharathorn Rimchala; Alan Wells; Forest M White; Roger D Kamm; Douglas A Lauffenburger Journal: Mol Cell Proteomics Date: 2013-09-09 Impact factor: 5.911
Authors: Dina K Gaynullina; Tatiana V Kudryashova; Alexander V Vorotnikov; Rudolf Schubert; Olga S Tarasova Journal: Int J Mol Sci Date: 2021-06-03 Impact factor: 5.923