SMP-534 inhibits TGF-β-induced ECM production in fibroblast cells and reduces mesangial matrix accumulation in experimental glomerulonephritis

2005 ◽  
Vol 289 (5) ◽  
pp. F998-F1004 ◽  
Author(s):  
Eiji Sugaru ◽  
Mutsuko Sakai ◽  
Kazuhiko Horigome ◽  
Teruhisa Tokunaga ◽  
Makoto Kitoh ◽  
...  
Keyword(s):  
Growth Factor ◽  
Transforming Growth Factor ◽  
Periodic Acid ◽  
Transforming Growth Factor Β ◽  
Mitogen Activated Protein Kinase ◽  
Cortical Region ◽  
Fibroblast Cells ◽  
Periodic Acid Schiff ◽  
Extracellular Signal ◽  
Mitogen Activated Protein

Transforming growth factor-β (TGF-β) is a potent fibrotic factor responsible for the synthesis of extracellular matrix (ECM) and is implicated as the major determinant in pathogenesis of chronic fibroses, including kidney. The novel small compound SMP-534 reduced ECM production induced by TGF-β in fibroblast cells. SMP-534 inhibited TGF-β-induced p38 mitogen-activated protein kinase (p38) activation but did not inhibit epidermal growth factor (EGF)-induced extracellular signal-related kinase (ERK) activation. We also found that oral administration of SMP-534 dose dependently lowered hydroxyproline contents in the cortical region of the kidney in rat anti-Thy-1 nephritis models. In periodic acid-Schiff staining of kidney sections, ECM accumulation was reduced by SMP-534 treatment. These data indicate that SMP-534 has potential in therapy for fibrotic diseases, including nephropathy.

scholarly journals Isoflavones regulate secretion of leukemia inhibitory factor and transforming growth factor β and expression of glycodelin in human endometrial epithelial cells

2007 ◽  
Vol 196 (2) ◽  
pp. 425-433 ◽  
Author(s):  
Jin-Wen Xu ◽  
Naomi Yasui ◽  
Katsumi Ikeda ◽  
Wei-Jun Pan ◽  
June Watanabe ◽  
...  
Keyword(s):  
Growth Factor ◽  
Protein Kinase ◽  
Epithelial Cells ◽  
Leukemia Inhibitory Factor ◽  
Transforming Growth Factor ◽  
Transforming Growth Factor Β ◽  
Mitogen Activated Protein Kinase ◽  
Mitogen Activated Protein ◽  
Ishikawa Cells ◽  
Endometrial Epithelial Cells

Isoflavones have attracted much attention due to their association with health benefits; however, comprehensive understanding of the beneficial impacts of isoflavones on uterine biology at the molecular level remains unexplored. In the present study, our data showed that isoflavones aglycones AglyMax, genistein, and equol, but not daidzein, within the range of plasma concentration, displayed bioavailability in regulating the secretion of leukemia inhibitory factor (LIF) and transforming growth factor β (TGF-β) in Ishikawa cells, which was blocked by an estrogen receptor antagonist ICI 182 780, mitogen-activated protein kinase kinase (MEK)1/2 inhibitor PD98059, and p38 mitogen-activated protein kinase inhibitor SB203580. We also found that AglyMax and genistein increased in cyclic AMP release and the expression of glycodelin protein in Ishikawa cells assayed using western blot and immunochemical staining. The MEK1/2 inhibitor PD98059 and the protein kinase A inhibitor H89, but not SB203580, attenuated this glycoprotein expression. Moreover, isoflavone aglycones AglyMax stimulated LIF, and TGF-β secretion, and glycodelin expression in separate primary endometrial epithelial cells in the follicular phase or luteal phase from healthy subject donors. Overall, our findings suggest that isoflavones may alter the uterine expression of estrogen-responsive genes.

scholarly journals Transforming Growth Factor β/NR4A1-Inducible Breast Cancer Cell Migration and Epithelial-to-Mesenchymal Transition Is p38α (Mitogen-Activated Protein Kinase 14) Dependent

2017 ◽  
Vol 37 (18) ◽  
Author(s):  
Erik Hedrick ◽  
Stephen Safe
Keyword(s):  
Breast Cancer ◽  
Cell Migration ◽  
Growth Factor ◽  
Nuclear Export ◽  
Epithelial To Mesenchymal Transition ◽  
Transforming Growth Factor ◽  
Transforming Growth Factor Β ◽  
Mitogen Activated Protein Kinase ◽  
Mesenchymal Transition ◽  
Mitogen Activated Protein

ABSTRACT Transforming growth factor β (TGF-β)-induced migration of triple-negative breast cancer (TNBC) cells is dependent on nuclear export of the orphan receptor NR4A1, which plays a role in proteasome-dependent degradation of SMAD7. In this study, we show that TGF-β induces p38α (mitogen-activated protein kinase 14 [MAPK14]), which in turn phosphorylates NR4A1, resulting in nuclear export of the receptor. TGF-β/p38α and NR4A1 also play essential roles in the induction of epithelial-to-mesenchymal transition (EMT) and induction of β-catenin in TNBC cells, and these TGF-β-induced responses and nuclear export of NR4A1 are blocked by NR4A1 antagonists, the p38 inhibitor SB202190, and kinase-dead [p38(KD)] and dominant-negative [p38(DN)] forms of p38α. Inhibition of NR4A1 nuclear export results in nuclear export of TGF-β-induced β-catenin, which then undergoes proteasome-dependent degradation. TGF-β-induced β-catenin also regulates NR4A1 expression through formation of the β-catenin–TCF-3/TCF-4/LEF-1 complex on the NR4A1 promoter. Thus, TGF-β-induced nuclear export of NR4A1 in TNBC cells plays an essential role in cell migration, SMAD7 degradation, EMT, and induction of β-catenin, and all of these pathways are inhibited by bis-indole-derived NR4A1 antagonists that inhibit nuclear export of the receptor and thereby block TGF-β-induced migration and EMT.

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