title: Ca2+/calmodulin-dependent protein kinase IIdelta and protein kinase D overexpression reinforce the histone deacetylase 5 redistribution in heart failure.
abstract: Cardiac hypertrophy and heart failure (HF) are associated with reactivation of fetal cardiac genes, and class II histone deacetylases (HDACs) (eg, HDAC5) have been strongly implicated in this process. We have shown previously that inositol trisphosphate, Ca2+/calmodulin-dependent protein kinase II (CaMKII), and protein kinase (PK)D are involved in HDAC5 phosphorylation and nuclear export in normal adult ventricular myocytes and also that CaMKIIdelta and inositol trisphosphate receptors are upregulated in HF. Here we tested whether, in our rabbit HF model, nucleocytoplasmic shuttling of HDAC5 was altered either at baseline or in response to endothelin-1, which would indicate HDAC5 phosphorylation and transcription effects. The fusion protein HDAC5-green fluorescent protein (HDAC5-GFP) was more cytosolic in HF myocytes (F(nuc)/F(cyto) 3.3+/-0.3 vs 7.2+/-0.4 in control), and HDAC5 was more phosphorylated. Despite this baseline cytosolic HDAC5 shift, endothelin-1 produced more rapid HDAC5-GFP nuclear export in HF versus control myocytes. We also find that PKD and CaMKIIdelta(C) expression and activation state are increased in both rabbit and human HF. Inhibition of either CaMKII or PKD in HF myocytes partially restored the HDAC5-GFP F(nuc)/F(cyto) toward control, and simultaneous inhibition restored F(nuc)/F(cyto) to that in control myocytes. Moreover, adenovirus-mediated overexpression of PKD, CaMKIIdelta(B), or CaMKIIdelta(C) reduced baseline HDAC5 F(nuc)/F(cyto) in control myocytes (3.4+/-0.5, 3.8+/-0.5, and 5.2+/-0.5, respectively), approaching that seen in HF. We conclude that chronic upregulation and activation of inositol trisphosphate receptors, CaMKII, and PKD in HF shifts HDAC5 out of the nucleus, derepressing transcription of hypertrophic genes. This may directly contribute to the development and/or maintenance of HF.
authors.affiliation: Department of Physiology, Loyola University Chicago, Maywood, IL 60153, USA.
authors.forename: Julie
authors.initials: J
authors.lastname: Bossuyt
authors.forename: Kathryn
authors.initials: K
authors.lastname: Helmstadter
authors.forename: Xu
authors.initials: X
authors.lastname: Wu
authors.forename: Hugh
authors.initials: H
authors.lastname: Clements-Jewery
authors.forename: Robert S
authors.initials: RS
authors.lastname: Haworth
authors.forename: Metin
authors.initials: M
authors.lastname: Avkiran
authors.forename: Jody L
authors.initials: JL
authors.lastname: Martin
authors.forename: Steven M
authors.initials: SM
authors.lastname: Pogwizd
authors.forename: Donald M
authors.initials: DM
authors.lastname: Bers
mesh_terms: D021581:Active Transport, Cell Nucleus; D000328:Adult; D000818:Animals; D001596:Benzylamines / Q000494:pharmacology; D054732:Calcium-Calmodulin-Dependent Protein Kinase Type 2 / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism*; D002227:Carbazoles / Q000494:pharmacology; D002467:Cell Nucleus / Q000201:enzymology; D002478:Cells, Cultured; D003600:Cytosol / Q000201:enzymology; D004195:Disease Models, Animal; D019332:Endothelin-1 / Q000378:metabolism; D004789:Enzyme Activation; D005260:Female; D006333:Heart Failure / Q000201:enzymology* / Q000235:genetics / Q000473:pathology / Q000503:physiopathology; D006352:Heart Ventricles / Q000201:enzymology; D006655:Histone Deacetylases / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D007211:Indoles / Q000494:pharmacology; D008297:Male; D008875:Middle Aged; D009206:Myocardium / Q000201:enzymology* / Q000473:pathology; D032383:Myocytes, Cardiac / Q000201:enzymology; D010766:Phosphorylation; D011493:Protein Kinase C / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism*; D047428:Protein Kinase Inhibitors / Q000494:pharmacology; D011817:Rabbits; D011993:Recombinant Fusion Proteins / Q000378:metabolism; D013449:Sulfonamides / Q000494:pharmacology; D013997:Time Factors; D014158:Transcription, Genetic; D014161:Transduction, Genetic; D015854:Up-Regulation; D016277:Ventricular Function, Left; D000096926:Benzenesulfonamides
chemical_list: D001596:Benzylamines; D054732:Calcium-Calmodulin-Dependent Protein Kinase Type 2; D002227:Carbazoles; D019332:Endothelin-1; D006655:Histone Deacetylases; D007211:Indoles; D011493:Protein Kinase C; D047428:Protein Kinase Inhibitors; D011993:Recombinant Fusion Proteins; D013449:Sulfonamides; C081021:Go 6976; C072105:KN 93; D000096926:Benzenesulfonamides; C089212:protein kinase D; C517660:CAMK2D protein, human; C404500:HDAC5 protein, human