Kidney disease has been linked to dysregulated signaling via protein kinase C (PKC) in kidney cells such as podocytes. PKCα is a conventional isoform of PKC and a well-known binding partner of β-catenin, which promotes its degradation. β-Catenin is the main effector of the canonical Wnt pathway and is critical in cell adhesion. However, whether other PKC isoforms interact with β-catenin has not been studied systematically. Here we demonstrate that PKCε-deficient mice, which develop proteinuria and glomerulosclerosis, display a lower β-catenin expression compared to PKC wildtype mice, consistent with an altered phenotype of podocytes in culture. Remarkably, β-catenin showed a reversed subcellular localization pattern: while β-catenin exhibited a perinuclear pattern in undifferentiated wild-type cells, it predominantly localized to the nucleus in PKCε-knockout cells. Phorbol 12-myristate 13-acetate stimulation of both cell types revealed that PKCε positively regulates β-catenin expression and stabilization in a glycogen synthase kinase-3β independent manner. Further, β-catenin overexpression in PKCε-deficient podocytes could restore the wildtype phenotype, similar to the rescue with a PKCε construct. This effect was mediated by upregulation of P-cadherin and the β-catenin downstream target fascin1. Zebrafish studies indicated three PKCε-specific phosphorylation sites in β-catenin that are required for full β-catenin function. Co-immunoprecipitation and pulldown assays confirmed PKCε and β-catenin as binding partners and revealed that ablation of the three PKCε phosphorylation sites weakens their interaction. In summary, we identified a novel pathway for regulation of β-catenin levels and define PKCε as an important β-catenin interaction partner and signaling opponent of other PKC isoforms in podocytes.
from #AlexandrosSfakianakis via Alexandros G.Sfakianakis on Inoreader http://ift.tt/2rWGlDF
via IFTTT
Εγγραφή σε:
Σχόλια ανάρτησης (Atom)
Δημοφιλείς αναρτήσεις
-
Publication date: Available online 4 January 2018 Source: European Journal of Radiology Author(s): Peiyao Zhang, Jing Wang, Qin Xu, Zhen...
-
Does CBD Oil Lower Blood Pressure? This article was originally published at SundayScaries." Madeline Taylor POSTED ON January 13, 20...
-
Medicine by Alexandros G. Sfakianakis,Anapafseos 5 Agios Nikolaos 72100 Crete Greece,00302841026182, Butyric Acid from Probiotic Staphyloco...
-
Medicine by Alexandros G. Sfakianakis,Αλέξανδρος Γ. Σφακιανάκης A Novel Technique for Endoscopic Repair of Large Anterior Skull Base Defect...
-
2016-11-22T07-55-59Z Source: International Journal of Medical Science and Public Health Banothu Srinivas, Madhu Mohan Reddy B. Backgrou...
-
BACKGROUND AND PURPOSE: Lesion load is a common biomarker in multiple sclerosis, yet it has historically shown modest association with cl...
-
Abstract The development of focused ion beam-scanning electron microscopy (FIB-SEM) techniques has allowed high-resolution 3D imaging of n...
-
Vol.48 No.2 from #AlexandrosSfakianakis via Alexandros G.Sfakianakis on Inoreader http://ift.tt/1S2Z7n2 via IFTTT
-
Sensory Topography of Oral Structures. JAMA Otolaryngol Head Neck Surg. 2016 Sep 29; Authors: Bearelly S, Cheung SW Abstract Import...
Δεν υπάρχουν σχόλια:
Δημοσίευση σχολίου