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Le Grazie di Ancona, Italy

Vecellio M.,Centro Cardiologico Monzino | Vecellio M.,Goethe University Frankfurt | Spallotta F.,Centro Cardiologico Monzino | Spallotta F.,Goethe University Frankfurt | And 19 more authors.
Diabetes | Year: 2014

This study investigates the diabetes-associated alterations present in cardiac mesenchymal cells (CMSC) obtained from normoglycemic (ND-CMSC) and type 2 diabetic patients (D-CMSC), identifying the histone acetylase (HAT) activator pentadecylidenemalonate 1b (SPV106) as a potential pharmacological intervention to restore cellular function. D-CMSC were characterized by a reduced proliferation rate, diminished phosphorylation at histone H3 serine 10 (H3S10P), decreased differentiation potential, and premature cellular senescence. A global histone code profiling of D-CMSC revealed that acetylation on histone H3 lysine 9 (H3K9Ac) and lysine 14 (H3K14Ac) was decreased, whereas the trimethylation of H3K9Ac and lysine 27 significantly increased. These observations were paralleled by a downregulation of the GCN5-related N-acetyltransferases (GNAT) p300/CBP-associated factor and its isoform 5-α general control of amino acid synthesis (GCN5a), determining a relative decrease in total HAT activity. DNA CpG island hypermethylation was detected at promoters of genes involved in cell growth control and genomic stability. Remarkably, treatment with the GNAT proactivator SPV106 restored normal levels of H3K9Ac and H3K14Ac, reduced DNA CpG hypermethylation, and recovered D-CMSC proliferation and differentiation. These results suggest that epigenetic interventions may reverse alterations in human CMSC obtained from diabetic patients. © 2014 by the American Diabetes Association.

Spallotta F.,Centro Cardiologico Monzino | Spallotta F.,Goethe University Frankfurt | Cencioni C.,Centro Cardiologico Monzino | Cencioni C.,Goethe University Frankfurt | And 11 more authors.
Journal of Biological Chemistry | Year: 2013

Background: Nitric oxide (NO) regulates class I and IIa histone deacetylase (HDAC) function. NO production is regulated by class III HDACs (sirtuins). Results: NO functions as a bridging molecule between class I and sirtuins (SIRTs). Conclusion: The SIRT-NO-class I HDAC axis provides key signals during wound repair. Significance: Modulation of HDAC activity may play an important role in tissue regeneration. © 2013 by The American Society for Biochemistry and Molecular Biology, Inc.

Spallotta F.,Centro Cardiologico Monzino | Spallotta F.,Goethe University Frankfurt | Cencioni C.,Centro Cardiologico Monzino | Cencioni C.,Goethe University Frankfurt | And 6 more authors.
Communicative and Integrative Biology | Year: 2013

In physiopathological conditions, such as diabetes, wound healing is significantly compromised and chronic complications, including ulcers, may occur. In a mouse model of skin repair, we recently reported that wound treatment with Sirtuin activators and class I HDAC inhibitors induced keratinocyte proliferation and enhanced healing via a nitric oxide (NO) dependent mechanism. We observed an increase in total protein acetylation in the wound area, as determined by acetylation of a-tubulin and histone H3 Lysine 9. We reasoned that this process activated cell function as well as regulated gene expression to foster tissue repair. We report here that the direct activation of P300/CBP-associated factor (PCAF) by the histone acetylase activator pentadecylidenemalonate 1b (SPV-106) induced Lysine acetylation in the wound area. This intervention was sufficient to enhance repair process by a NO-independent mechanism. Hence, an impairment of PCAF and/or other GCN5 family acetylases may delay skin repair in physiopathological conditions. © 2013 Landes Bioscience.

Voellenkle C.,Laboratorio Of Cardiologia Molecolare | Van Rooij J.,Laboratorio Of Cardiologia Molecolare | Cappuzzello C.,Centro Cardiologico Monzino IRCCS | Greco S.,Laboratorio Of Cardiologia Molecolare | And 9 more authors.
Physiological Genomics | Year: 2010

MicroRNAs (miRNAs) are noncoding RNAs that act as negative regulators of gene expression. Interestingly, specific alterations of miRNA expression have been found in failing hearts of different etiologies. The aim of this study was to identify the miRNA expression pattern of peripheral blood mononuclear cells (PBMCs) derived from chronic heart failure (CHF) patients affected by ischemic (ICM) and nonischemic dilated (NIDCM) cardiomyopathy. The expression profile of 257 miRNAs was assessed in 7 NIDCM patients, 8 ICM patients, and 9 control subjects by quantitative real-time PCR. Significantly modulated miRNAs were validated by using an independent set of 34 CHF patients (NIDCM = 19, ICM = 15) and 19 control subjects. Three miRNAs (miR-107, -139, and -142-5p) were downmodulated in both NIDCM and ICM patients versus control subjects. Other miRNAs were deregulated in only one of the CHF classes analyzed compared with control subjects: miR-142-3p and -29b were increased in NIDCM patients, while miR-125b and -497 were decreased in ICM patients. Bioinformatic analysis of miRNA predicted targets and of gene expression modifications associated with CHF in PBMCs indicated a significant impact of the miRNA signature on the transcriptome. Furthermore, miRNAs of both the NIDCM and the ICM signature shared predicted targets among CHF-modulated genes, suggesting potential additive or synergistic effects. The present study identified miRNAs specifically modulated in the PBMCs of NIDCM and ICM patients. Intriguingly, most of these miRNAs were previously reported as deregulated in human and/or mouse failing hearts. The identified miRNAs might have a potential diagnostic and/or prognostic use in CHF. Copyright © 2010 the American Physiological Society.

Magenta A.,Laboratorio Of Patologia Vascolare | Cencioni C.,Centro Cardiologico Monzino IRCCS | Fasanaro P.,Laboratorio Of Cardiologia Molecolare | Zaccagnini G.,Laboratorio Of Cardiologia Molecolare | And 5 more authors.
Cell Death and Differentiation | Year: 2011

We examined the effect of reactive oxygen species (ROS) on MicroRNAs (miRNAs) expression in endothelial cells in vitro, and in mouse skeletal muscle following acute hindlimb ischemia. Human umbilical vein endothelial cells (HUVEC) were exposed to 200 M hydrogen peroxide (H 2 O 2) for 8 tO 24 h; miRNAs profiling showed that miR-200c and the co-transcribed miR-141 increased more than eightfold. The other miR-200 gene family members were also induced, albeit to a lower level. Furthermore, miR-200c upregulation was not endothelium restricted, and occurred also on exposure to an oxidative stress-inducing drug: 1,3-bis(2 chloroethyl)-1nitrosourea (BCNU). miR-200c overexpression induced HUVEC growth arrest, apoptosis and senescence; these phenomena were also induced by H 2 O 2 and were partially rescued by miR-200c inhibition. Moreover, miR-200c target ZEB1 messenger RNA and protein were downmodulated by H 2 O 2 and by miR-200c overexpression. ZEB1 knockdown recapitulated miR-200c-induced responses, and expression of a ZEB1 allele non-targeted by miR-200c, prevented miR-200c phenotype. The mechanism of H 2 O 2-mediated miR-200c upregulation involves p53 and retinoblastoma proteins. Acute hindlimb ischemia enhanced miR-200c in wild-type mice skeletal muscle, whereas in p66 ShcA/mice, which display lower levels of oxidative stress after ischemia, upregulation of miR-200c was markedly inhibited. In conclusion, ROS induce miR-200c and other miR-200 family members; the ensuing downmodulation of ZEB1 has a key role in ROS-induced apoptosis and senescence. © 2011 Macmillan Publishers Limited All rights reserved.

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