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Src-mediated crosstalk between FXR and YAP protects against renal fibrosis.
- Source :
-
FASEB journal : official publication of the Federation of American Societies for Experimental Biology [FASEB J] 2019 Oct; Vol. 33 (10), pp. 11109-11122. Date of Electronic Publication: 2019 Jul 12. - Publication Year :
- 2019
-
Abstract
- Renal fibrosis is the common pathway of chronic kidney disease progression. The nuclear receptor farnesoid X receptor [FXR, NR1H4 (nuclear receptor subfamily 1 group member 4)], a multifunctional transcription factor, plays a pivotal role in protecting against fibrosis. However, the mechanisms underlying these antifibrotic actions of FXR in kidney disease are largely unknown. Here, we show that agonist GW4064-mediated FXR activation inhibits the activity of the nonreceptor tyrosine kinase Src (proto-oncogene tyrosine-protein kinase), which is critical for regulation of yes-associated protein (YAP) phosphorylation and nuclear localization in renal fibrosis. Activation of FXR suppressed renal fibrosis and Tyr416-Src phosphorylation in TGF-β-treated human renal proximal tubule epithelial (HK2) cells. Moreover, GW4064 treatment in HK2 cells increased Ser127 phosphorylation, cytosolic accumulation of YAP, and interaction of the hippo core kinases (Ste20-like kinase 1, large tumor suppressor kinase 1, and salvador homolog 1). Inhibition of Src using PP2 (Src kinase inhibitor) prevented renal fibrosis and increased Ser127 phosphorylation and cytosolic accumulation of YAP. The expression of fibrosis markers, inflammatory genes, and YAP target genes was increased in the kidneys of FXR knockout mice compared with those of wild-type mice. In addition, GW4064 or WAY-362450 (turofexorate isopropyl) treatment protected against unilateral ureteral obstruction-induced renal fibrosis. Collectively, our data support the novel conclusion that Src-mediated crosstalk between FXR and YAP protects against renal fibrosis, making this pathway a possible therapeutic target for chronic kidney disease.-Kim, D.-H., Choi, H.-I., Park, J. S., Kim, C. S., Bae, E. H., Ma, S. K., Kim, S. W. Src-mediated crosstalk between FXR and YAP protects against renal fibrosis.
- Subjects :
- Animals
Epithelial Cells drug effects
Epithelial Cells metabolism
Humans
Isoxazoles pharmacology
Kidney drug effects
Male
Mice
Mice, Inbred C57BL
Mice, Knockout
Phosphorylation drug effects
Phosphorylation physiology
Proto-Oncogene Mas
Signal Transduction drug effects
Signal Transduction physiology
YAP-Signaling Proteins
Adaptor Proteins, Signal Transducing metabolism
Cell Cycle Proteins metabolism
Fibrosis metabolism
Kidney metabolism
Kidney Diseases metabolism
Receptors, Cytoplasmic and Nuclear metabolism
src-Family Kinases metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1530-6860
- Volume :
- 33
- Issue :
- 10
- Database :
- MEDLINE
- Journal :
- FASEB journal : official publication of the Federation of American Societies for Experimental Biology
- Publication Type :
- Academic Journal
- Accession number :
- 31298930
- Full Text :
- https://doi.org/10.1096/fj.201900325R