Serelaxin inhibits differentiation and fibrotic behaviors of cardiac fibroblasts by suppressing ALK-5/Smad2/3 signaling pathway

2018 ◽  
Vol 362 (1) ◽  
pp. 17-27 ◽  
Author(s):  
Xue-ping Wu ◽  
Hai-jie Wang ◽  
Yong-li Wang ◽  
Hao-ran Shen ◽  
Yu-zhen Tan
Keyword(s):  
Signaling Pathway ◽  
Cardiac Fibroblasts ◽  
Alk 5

scholarly journals Modulation of TGF-β signaling by endoglin in murine hemangioblast development and primitive hematopoiesis

Blood ◽  
2011 ◽  
Vol 118 (1) ◽  
pp. 88-97 ◽  
Author(s):  
Liying Zhang ◽  
Alessandro Magli ◽  
Jacquelyn Catanese ◽  
Zhaohui Xu ◽  
Michael Kyba ◽  
...  
Keyword(s):  
Signaling Pathway ◽  
Transforming Growth Factor ◽  
Es Cells ◽  
Transforming Growth Factor Β ◽  
Early Developmental Stage ◽  
Type I ◽  
Hematopoietic Development ◽  
Downstream Target ◽  
Primitive Hematopoiesis ◽  
Alk 5

Abstract Endoglin (Eng), an accessory receptor for the transforming growth factor β (TGF-β) superfamily, is required for proper hemangioblast and primitive hematopoietic development. However the mechanism by which endoglin functions at this early developmental stage is currently unknown. Transcriptional analyses of differentiating eng−/− and eng+/+ ES cells revealed that lack of endoglin leads to profound reductions in the levels of key hematopoietic regulators, including Scl, Lmo2, and Gata2. We also detected lower levels of phosphorylated Smad1 (pSmad1), a downstream target signaling molecule associated with the TGF-β pathway. Using doxycycline-inducible ES cell lines, we interrogated the TGF-β signaling pathway by expressing activated forms of ALK-1 and ALK-5, type I receptors for TGF-β. Our results indicate that ALK-1 signaling promotes hemangioblast development and hematopoiesis, as evidenced by colony assays, gene expression and FACS analyses, whereas signaling by ALK-5 leads to the opposite effect, inhibition of hemangioblast and hematopoietic development. In Eng−/− ES cells, ALK-1 rescued both the defective hemangioblast development, and primitive erythropoiesis, indicating that ALK-1 signaling can compensate for the absence of endoglin. We propose that endoglin regulates primitive hematopoiesis by modulating the activity of the Smad1/5 signaling pathway in early stages of development.

scholarly journals MicroRNA-101a Inhibits Cardiac Fibrosis Induced by Hypoxia via Targeting TGFβRI on Cardiac Fibroblasts

2015 ◽  
Vol 35 (1) ◽  
pp. 213-226 ◽  
Author(s):  
Xin Zhao ◽  
Kejing Wang ◽  
Yuhua Liao ◽  
Qiutang Zeng ◽  
Yushu Li ◽  
...  
Keyword(s):  
Signaling Pathway ◽  
Transforming Growth Factor Beta ◽  
Cardiac Remodeling ◽  
Cardiac Fibrosis ◽  
Transforming Growth Factor ◽  
Cardiac Fibroblasts ◽  
Coronary Artery Occlusion ◽  
Artery Occlusion ◽  
Luciferase Reporter ◽  
Migration Ability

Background/Aims: Hypoxia is a basic pathological challenge that is associated with numerous cardiovascular disorders including aberrant cardiac remodeling. Transforming growth factor beta (TGF-β) signaling pathway plays a pivotal role in mediating cardiac fibroblast (CF) function and cardiac fibrosis. Recent data suggested that microRNA-101a (miR-101a) exerted anti-fibrotic effects in post-infarct cardiac remodeling and improved cardiac function. This study aimed to investigate the potential relationship between hypoxia, miR-101a and TGF-β signaling pathway in CFs. Methods and Results: Two weeks following coronary artery occlusion in rats, the expression levels of both TGFβ1 and TGFβRI were increased, but the expression of miR-101a was decreased at the site of the infarct and along its border. Cultured rat neonatal CFs treated with hypoxia were characterized by the up-regulation of TGFβ1 and TGFβRI and the down-regulation of miR-101a. Delivery of miR-101a mimics significantly suppressed the expression of TGFβRI and p-Smad 3, CF differentiation and collagen content of CFs. These anti-fibrotic effects were abrogated by co-transfection with AMO-miR-101a, an antisense inhibitor of miR-101a. The repression of TGFβRI, a target of miR-101a, was validated by luciferase reporter assays targeting the 3'UTR of TGFβRI. Additionally, we found that overexpression of miR-101a reversed the improved migration ability of CFs and further reduced CF proliferation caused by hypoxia. Conclusion: Our study illustrates that miR-101a exerts anti-fibrotic effects by targeting TGFβRI, suggesting that miR-101a plays a multi-faceted role in modulating TGF-β signaling pathway and cardiac fibrosis.

scholarly journals Toll-like receptor 9 prevents cardiac rupture after myocardial infarction in mice independently of inflammation

2016 ◽  
Vol 311 (6) ◽  
pp. H1485-H1497 ◽  
Author(s):  
Shigemiki Omiya ◽  
Yosuke Omori ◽  
Manabu Taneike ◽  
Andrea Protti ◽  
Osamu Yamaguchi ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Signaling Pathway ◽  
Cardiac Fibroblasts ◽  
Cardiac Rupture ◽  
Toll Like Receptor ◽  
Wild Type ◽  
Double Positive ◽  
Cpg Oligonucleotide ◽  
Deficient Mice ◽  
Tlr9 Signaling

We have reported that the Toll-like receptor 9 (TLR9) signaling pathway plays an important role in the development of pressure overload-induced inflammatory responses and heart failure. However, its role in cardiac remodeling after myocardial infarction has not been elucidated. TLR9-deficient and control C57Bl/6 wild-type mice were subjected to left coronary artery ligation. The survival rate 14 days postoperation was significantly lower in TLR9-deficient mice than that in wild-type mice with evidence of cardiac rupture in all dead mice. Cardiac magnetic resonance imaging showed no difference in infarct size and left ventricular wall thickness and function between TLR9-deficient and wild-type mice. There were no differences in the number of infiltrating inflammatory cells and the levels of inflammatory cytokine mRNA in infarct hearts between TLR9-deficient and wild-type mice. The number of α-smooth muscle actin (αSMA)-positive myofibroblasts and αSMA/Ki67-double-positive proliferative myofibroblasts was increased in the infarct and border areas in infarct hearts compared with those in sham-operated hearts in wild-type mice, but not in TLR9-deficient mice. The class B CpG oligonucleotide increased the phosphorylation level of NF-κB and the number of αSMA-positive and αSMA/Ki67-double-positive cells and these increases were attenuated by BAY1-7082, an NF-κB inhibitor, in cardiac fibroblasts isolated from wild-type hearts. The CpG oligonucleotide showed no effect on NF-κB activation or the number of αSMA-positive and αSMA/Ki67-double-positive cells in cardiac fibroblasts from TLR9-deficient hearts. Although the TLR9 signaling pathway is not involved in the acute inflammatory response in infarct hearts, it ameliorates cardiac rupture possibly by promoting proliferation and differentiation of cardiac fibroblasts. Listen to this article’s corresponding podcast @ http://ajpheart.podbean.com/e/tlr9-in-post-infarct-cardiac-rupture/ .

AB23A Reduces TGF-β1-Induced Human Cardiac Fibroblasts (HCF) Proliferation and Collagen Secretion via MER/ERK1/2/CREB Pathway

2020 ◽  
Vol 10 (6) ◽  
pp. 798-803
Author(s):  
Dinghui Hu ◽  
Yanhu Wu ◽  
Jin Du ◽  
Hang Li ◽  
Zuntao Liu
Keyword(s):  
Western Blot ◽  
Signaling Pathway ◽  
Myocardial Fibrosis ◽  
Cardiac Fibroblasts ◽  
Heart Diseases ◽  
Protein Levels ◽  
Collagen Secretion ◽  
Assay Result ◽  
Human Cardiac Fibroblasts ◽  
Creb Pathway

Background and Objectives: Myocardial fibrosis is associated with many forms of heart diseases which is characterized by the accumulation of activated cardiac fibroblasts (CFBs) and excess deposition of extracellular matrix (ECM). Natural compounds such as Alisol B 23-acetate has been proved to maintain the activation of ERK1/2, but whether it can affect cardiac fibroblasts by MER/ERK1/2/CREB signaling pathway is still unknown. Methods: The cell was identified with α-SMA protein level detected by immunofluorescence staining method. The cell proliferation was examined by CCK8 assay. Col I and Col III protein levels were examined by western blot and sirius red staining to detect the ECM level. Furthermore, p-MERK, MERK, P-ERK, ERK and CREB were examined by western blot to verify whether Alisol could activate the MERK/ERK1/2/CREB pathway in myocardial fibrosis. Results: CCK8 assay result indicated that Alisol reduced the cell viability of CFBs induced by TGF-β1. In addition, Alisol significantly decreased the ECM deposition of CFBs. Furthermore, Alisol could activate MERK/ERK1/2/CREB signaling pathway. Conclusion: These results verified that Alisol inhibited myocardial fibrosis via MERK/ERK1/2/CREB pathway.

Resveratrol inhibits proliferation of cultured rat cardiac fibroblasts: Correlated with NO–cGMP signaling pathway

2007 ◽  
Vol 567 (1-2) ◽  
pp. 26-35 ◽  
Author(s):  
ShiJun Wang ◽  
XingXiang Wang ◽  
Jie Yan ◽  
XuDong Xie ◽  
FangHua Fan ◽  
...  
Keyword(s):  
Signaling Pathway ◽  
Cardiac Fibroblasts ◽  
Cgmp Signaling
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