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@ARTICLE{Bock:136766,
author = {Bock, Fabian and Shahzad, Khurrum and Wang, Hongjie and
Stoyanov, Stoyan and Wolter, Juliane and Dong, Wei and
Pelicci, Pier Giuseppe and Kashif, Muhammed and Ranjan,
Satish and Schmidt, Simone and Ritzel, Robert and Schwenger,
Vedat and Reymann, Klaus G and Esmon, Charles T and
Madhusudhan, Thati and Nawroth, Peter P and Isermann,
Berend},
title = {{A}ctivated protein {C} ameliorates diabetic nephropathy by
epigenetically inhibiting the redox enzyme p66{S}hc.},
journal = {Proceedings of the National Academy of Sciences of the
United States of America},
volume = {110},
number = {2},
issn = {0027-8424},
address = {Washington, DC},
publisher = {National Acad. of Sciences},
reportid = {DZNE-2020-03088},
pages = {648-653},
year = {2013},
abstract = {The coagulation protease activated protein C (aPC) confers
cytoprotective effects in various in vitro and in vivo
disease models, including diabetic nephropathy. The
nephroprotective effect may be related to antioxidant
effects of aPC. However, the mechanism through which aPC may
convey these antioxidant effects and the functional
relevance of these properties remain unknown. Here, we show
that endogenous and exogenous aPC prevents glomerular
accumulation of oxidative stress markers and of the
redox-regulating protein p66(Shc) in experimental diabetic
nephropathy. These effects were predominately observed in
podocytes. In vitro, aPC inhibited glucose-induced
expression of p66(Shc) mRNA and protein in podocytes (via
PAR-1 and PAR-3) and various endothelial cell lines, but not
in glomerular endothelial cells. Treatment with aPC reversed
glucose-induced hypomethylation and hyperacetylation of the
p66(Shc) promoter in podocytes. The hyperacetylating agent
sodium butyrate abolished the suppressive effect of aPC on
p66(Shc) expression both in vitro and in vivo. Moreover,
sodium butyrate abolished the beneficial effects of aPC in
experimental diabetic nephropathy. Inhibition of p66(Shc)
expression and mitochondrial translocation by aPC normalized
mitochondrial ROS production and the mitochondrial membrane
potential in glucose-treated podocytes. Genetic ablation of
p66(Shc) compensated for the loss of protein C activation in
vivo, normalizing markers of diabetic nephropathy and
oxidative stress. These studies identify a unique mechanism
underlying the cytoprotective effect of aPC. Activated PC
epigenetically controls expression of the redox-regulating
protein p66(Shc), thus linking the extracellular protease
aPC to mitochondrial function in diabetic nephropathy.},
keywords = {Analysis of Variance / Animals / Butyrates: pharmacology /
Chromatin Immunoprecipitation / DNA Methylation: drug
effects / DNA Primers: genetics / Diabetes Mellitus,
Experimental: complications / Diabetic Nephropathies: drug
therapy / Diabetic Nephropathies: etiology / Epigenetic
Repression: drug effects / Gene Knockdown Techniques /
Immunoblotting / Immunohistochemistry / Membrane Potential,
Mitochondrial: drug effects / Mice / Mitochondria: drug
effects / Mitochondria: metabolism / Podocytes: metabolism /
Protein C: pharmacology / Reverse Transcriptase Polymerase
Chain Reaction / Shc Signaling Adaptor Proteins: antagonists
$\&$ inhibitors / Shc Signaling Adaptor Proteins: metabolism
/ Src Homology 2 Domain-Containing, Transforming Protein 1 /
Statistics, Nonparametric / Subcellular Fractions /
Butyrates (NLM Chemicals) / DNA Primers (NLM Chemicals) /
Protein C (NLM Chemicals) / Shc Signaling Adaptor Proteins
(NLM Chemicals) / Shc1 protein, mouse (NLM Chemicals) / Src
Homology 2 Domain-Containing, Transforming Protein 1 (NLM
Chemicals)},
cin = {AG Dityatev / AG Reymann},
ddc = {500},
cid = {I:(DE-2719)1310007 / I:(DE-2719)1310005},
pnm = {342 - Disease Mechanisms and Model Systems (POF3-342)},
pid = {G:(DE-HGF)POF3-342},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:23267072},
pmc = {pmc:PMC3545757},
doi = {10.1073/pnas.1218667110},
url = {https://pub.dzne.de/record/136766},
}