RT Journal Article
SR Electronic
T1 Jagged1/Notch2 Controls Kidney Fibrosis via Tfam-mediated Metabolic Reprogramming
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 285726
DO 10.1101/285726
A1 Shizheng Huang
A1 Jihwan Park
A1 Chengxiang Qiu
A1 Yasemin Sirin
A1 Seung Hyeok Han
A1 Szu-yuan Li
A1 Verdon Taylor
A1 Ursula Zimber-Strobl
A1 Katalin Susztak
YR 2018
UL http://biorxiv.org/content/early/2018/03/29/285726.abstract
AB While Notch signaling has been proposed to play a key role in fibrosis, the direct molecular pathways targeted by Notch signaling and the precise ligand and receptor pair that are responsible for kidney disease remain poorly defined.In this study, we found that JAG1 and NOTCH2 showed the strongest correlation with the degree of interstitial fibrosis in a genome wide expression analysis of a large cohort of human kidney samples. RNA sequencing analysis of kidneys of mice with folic acid nephropathy, unilateral ureteral obstruction, or APOL1-associated kidney disease indicated that Jag1 and Notch2 levels were higher in all analyzed kidney fibrosis models. Mice with tubule-specific deletion of Jag1 or Notch2 (Kspcre/Jag1flox/flox, and Kspcre/Notch2flox/flox) had no kidney-specific alterations at baseline, but showed protection from folic acid induced kidney fibrosis. Tubule-specific genetic deletion of Notch1 and global knock-out of Notch3 had no effect on fibrosis. In vitro chromatin immunoprecipitation experiments and genome-wide expression studies identified the mitochondrial transcription factor A (Tfam) as a direct Notch target. Re-expression of Tfam in tubule cells prevented Notch-induced metabolic and profibrotic reprogramming. Kidney tubule specific deletion of Tfam resulted in perinatal lethality.In summary, Jag1/Notch2 plays a key role in kidney fibrosis development by regulating Tfam expression and metabolic reprogramming.