The Role of Grb14 in IGF1–PI3K Signalling and Cardiac Hypertrophy: A Potential Target for the Treatment of Heart Failure?

2009 ◽  
Vol 18 ◽  
pp. S303-S304
Author(s):  
K. Weeks ◽  
H. Kiriazis ◽  
N. Cemerlang ◽  
J.W. Tan ◽  
Z. Ming ◽  
...  
Keyword(s):  
Heart Failure ◽  
Cardiac Hypertrophy ◽  
Potential Target ◽  
Pi3k Signalling

scholarly journals Role of microRNAs in cardiac hypertrophy and heart failure

IUBMB Life ◽  
2009 ◽  
Vol 61 (6) ◽  
pp. 566-571 ◽  
Author(s):  
Nan Wang ◽  
Zhen Zhou ◽  
Xinghua Liao ◽  
Tongcun Zhang
Keyword(s):  
Heart Failure ◽  
Cardiac Hypertrophy

scholarly journals Loss of Endothelial HIF-Prolyl hydroxylase 2 (PHD2) Induces Cardiac Hypertrophy and Fibrosis

2021 ◽  
Author(s):  
Zhiyu Dai ◽  
Jianding Cheng ◽  
Bin Liu ◽  
Dan Yi ◽  
Anlin Feng ◽  
...  
Keyword(s):  
Heart Failure ◽  
Cardiac Hypertrophy ◽  
Cardiac Fibrosis ◽  
Left Ventricular ◽  
Dependent Manner ◽  
Adaptive Responses ◽  
Genetic Ablation ◽  
Pathological Cardiac Hypertrophy ◽  
And Function

Cardiac hypertrophy and fibrosis are common adaptive responses to injury and stress, eventually leading to heart failure. Hypoxia signaling is important to the (patho)physiological process of cardiac remodeling. However, the role of endothelial Prolyl-4 hydroxylase 2 (PHD2)/hypoxia inducible factors (HIFs) signaling in the pathogenesis of heart failure remains elusive. We observed a marked decrease of PHD2 expression in heart tissues and cardiovascular endothelial cells from patients with cardiomyopathy. Mice with Tie2-Cre-mediated deletion of Egln1 (encoding PHD2) or tamoxifen-induced endothelial Egln1 deletion exhibited left ventricular hypertrophy and cardiac fibrosis. Genetic ablation and pharmacological inhibition of Hif2a but not Hif1a in endothelial Egln1 deficient mice normalized cardiac size and function. The present studies define for the first time an unexpected role of endothelial PHD2 deficiency in inducing cardiac hypertrophy and fibrosis in a HIF-2α dependent manner. Targeting PHD2/HIF-2α signaling may represent a novel therapeutic approach for the treatment of pathological cardiac hypertrophy and failure.

scholarly journals Role of CyPA in cardiac hypertrophy and remodeling

2019 ◽  
Vol 39 (12) ◽  
Author(s):  
Mengfei Cao ◽  
Wei Yuan ◽  
Meiling Peng ◽  
Ziqi Mao ◽  
Qianru Zhao ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Heart Failure ◽  
Cardiac Hypertrophy ◽  
Interstitial Fibrosis ◽  
Systolic Function ◽  
Cardiac Fibroblasts ◽  
Cardiomyocyte Hypertrophy ◽  
Pathological Cardiac Hypertrophy ◽  
Complex Process

Abstract Pathological cardiac hypertrophy is a complex process and eventually develops into heart failure, in which the heart responds to various intrinsic or external stress, involving increased interstitial fibrosis, cell death and cardiac dysfunction. Studies have shown that oxidative stress is an important mechanism for this maladaptation. Cyclophilin A (CyPA) is a member of the cyclophilin (CyPs) family. Many cells secrete CyPA to the outside of the cells in response to oxidative stress. CyPA from blood vessels and the heart itself participate in a variety of signaling pathways to regulate the production of reactive oxygen species (ROS) and mediate inflammation, promote cardiomyocyte hypertrophy and proliferation of cardiac fibroblasts, stimulate endothelial injury and vascular smooth muscle hyperplasia, and promote the dissolution of extracellular matrix (ECM) by activating matrix metalloproteinases (MMPs). The events triggered by CyPA cause a decline of diastolic and systolic function and finally lead to the occurrence of heart failure. This article aims to introduce the role and mechanism of CyPA in cardiac hypertrophy and remodeling, and highlights its potential role as a disease biomarker and therapeutic target.

scholarly journals Molecules linked to Ras signaling as therapeutic targets in cardiac pathologies

2021 ◽  
Vol 54 (1) ◽  
Author(s):  
Manuel Ramos-Kuri ◽  
Sri Harika Meka ◽  
Fabio Salamanca-Buentello ◽  
Roger J. Hajjar ◽  
Larissa Lipskaia ◽  
...  
Keyword(s):  
Heart Failure ◽  
Protein Kinase ◽  
Cardiac Hypertrophy ◽  
Mapk Pathway ◽  
Therapeutic Targets ◽  
Cardiac Diseases ◽  
Ras Genes ◽  
Septal Defects ◽  
Pathological Cardiac Hypertrophy

Abstract The Ras family of small Guanosine Triphosphate (GTP)-binding proteins (G proteins) represents one of the main components of intracellular signal transduction required for normal cardiac growth, but is also critically involved in the development of cardiac hypertrophy and heart failure. The present review provides an update on the role of the H-, K- and N-Ras genes and their related pathways in cardiac diseases. We focus on cardiac hypertrophy and heart failure, where Ras has been studied the most. We also review other cardiac diseases, like genetic disorders related to Ras. The scope of the review extends from fundamental concepts to therapeutic applications. Although the three Ras genes have a nearly identical primary structure, there are important functional differences between them: H-Ras mainly regulates cardiomyocyte size, whereas K-Ras regulates cardiomyocyte proliferation. N-Ras is the least studied in cardiac cells and is less associated to cardiac defects. Clinically, oncogenic H-Ras causes Costello syndrome and facio-cutaneous-skeletal syndromes with hypertrophic cardiomyopathy and arrhythmias. On the other hand, oncogenic K-Ras and alterations of other genes of the Ras-Mitogen-Activated Protein Kinase (MAPK) pathway, like Raf, cause Noonan syndrome and cardio-facio-cutaneous syndromes characterized by cardiac hypertrophy and septal defects. We further review the modulation by Ras of key signaling pathways in the cardiomyocyte, including: (i) the classical Ras-Raf-MAPK pathway, which leads to a more physiological form of cardiac hypertrophy; as well as other pathways associated with pathological cardiac hypertrophy, like (ii) The SAPK (stress activated protein kinase) pathways p38 and JNK; and (iii) The alternative pathway Raf-Calcineurin-Nuclear Factor of Activated T cells (NFAT). Genetic alterations of Ras isoforms or of genes in the Ras-MAPK pathway result in Ras-opathies, conditions frequently associated with cardiac hypertrophy or septal defects among other cardiac diseases. Several studies underline the potential role of H- and K-Ras as a hinge between physiological and pathological cardiac hypertrophy, and as potential therapeutic targets in cardiac hypertrophy and failure. Graphic abstract

Abstract 16205: MKP-5 Deficiency Attenuates Pressure Overload-induced Cardiac Hypertrophy

Circulation ◽  
2020 ◽  
Vol 142 (Suppl_3) ◽  
Author(s):  
Kisuk Min ◽  
Yan Huang ◽  
Frank J Giordano ◽  
Sudip Bajpeyi ◽  
Anton M Bennett
Keyword(s):  
Heart Failure ◽  
Body Weight ◽  
Cardiac Hypertrophy ◽  
Cardiac Muscle ◽  
Molecular Mechanisms ◽  
Weight Ratio ◽  
Pressure Overload ◽  
Body Weight Ratio ◽  
Pathological Cardiac Hypertrophy

Introduction: Cardiac remodeling occurs in response to pathological stimuli including chronic pressure overload, subsequently leading to heart failure. Despite considerable research efforts, the molecular mechanisms responsible for heart failure have yet to be fully elucidated. One of the prominent signaling pathways involved in the development of pathological cardiac hypertrophy is the mitogen-activated protein kinases (MAPKs) pathways. The MAPKs are inactivated by the MAPK phosphatases (MKPs) through direct dephosphorylation. Growing evidence suggests the importance of MKP-5 signaling mechanisms in physiological and pathological processes. However, the role of MKP-5 has not been explored in cardiac muscle. The objective of this study is to investigate how MKP-5-mediated MAPK activity contributes to mechanisms responsible for pressure overload-induced cardiac hypertrophy. Hypothesis: We tested the hypothesis that MKP-5 serves as a central regulator of MAPKs in pressure overload-induced cardiac hypertrophy. Methods: To investigate the role of MKP-5 in cardiac muscle, we caused pressure overload-induced cardiac hypertrophy in wild type (mkp-5 +/+ ) mice and MKP-5 deficient mice (mkp-5 -/- ) through transverse aortic constriction (TAC). Cardiac function was evaluated by echocardiographic analysis at 4 weeks after TAC. Cardiac hypertrophy was measured by heart-to-body weight ratio. Interstitial myocardial fibrosis was evaluated by Sirius red stains and expression of fibrogenic genes was determined by quantitative PCR. Results: Echocardiographic analysis showed that the ejection fraction and fractional shortening of mkp-5 +/+ mice significantly decreased by at 4 weeks after TAC. Heart-to-body weight ratio increased in mkp-5 +/+ mice. However, MKP-5-deficient heart was protected from cardiac dysfunction and cardiac hypertrophy induced by TAC. Importantly, the fibrogenic genes were markedly reduced in mkp-5 -/- mice as compared with mkp-5 +/+ mice at 4 weeks after TAC. Conclusions: Collectively, our study demonstrates that MKP-5 deficiency prevents the heart from pressure overload-induced cardiac hypertrophy and suggests that MKP-5 may serve as a novel therapeutic target for treatment of heart disease.

Role of the Epigenome in Heart Failure

2020 ◽  
Vol 100 (4) ◽  
pp. 1753-1777 ◽  
Author(s):  
Roberto Papait ◽  
Simone Serio ◽  
Gianluigi Condorelli
Keyword(s):  
Heart Failure ◽  
Cardiac Hypertrophy ◽  
Epigenetic Modification ◽  
Heart Function ◽  
Histone Deacetylation ◽  
Cardiac Phenotype ◽  
Different Types ◽  
Response To Stress ◽  
Histone Methylation And Acetylation

Gene expression is needed for the maintenance of heart function under normal conditions and in response to stress. Each cell type of the heart has a specific program controlling transcription. Different types of stress induce modifications of these programs and, if prolonged, can lead to altered cardiac phenotype and, eventually, to heart failure. The transcriptional status of a gene is regulated by the epigenome, a complex network of DNA and histone modifications. Until a few years ago, our understanding of the role of the epigenome in heart disease was limited to that played by histone deacetylation. But over the last decade, the consequences for the maintenance of homeostasis in the heart and for the development of cardiac hypertrophy of a number of other modifications, including DNA methylation and hydroxymethylation, histone methylation and acetylation, and changes in chromatin architecture, have become better understood. Indeed, it is now clear that many levels of regulation contribute to defining the epigenetic landscape required for correct cardiomyocyte function, and that their perturbation is responsible for cardiac hypertrophy and fibrosis. Here, we review these aspects and draw a picture of what epigenetic modification may imply at the therapeutic level for heart failure.

scholarly journals Autophagy modulation: a potential therapeutic approach in cardiac hypertrophy

2017 ◽  
Vol 313 (2) ◽  
pp. H304-H319 ◽  
Author(s):  
Xuejun Wang ◽  
Taixing Cui
Keyword(s):  
Heart Failure ◽  
Quality Control ◽  
Cardiac Hypertrophy ◽  
Cardiac Remodeling ◽  
Pressure Overload ◽  
Energy Crisis ◽  
Pathogenic Role ◽  
Evolutionarily Conserved ◽  
Control Survival

Autophagy is an evolutionarily conserved process used by the cell to degrade cytoplasmic contents for quality control, survival for temporal energy crisis, and catabolism and recycling. Rapidly increasing evidence has revealed an important pathogenic role of altered activity of the autophagosome-lysosome pathway (ALP) in cardiac hypertrophy and heart failure. Although an early study suggested that cardiac autophagy is increased and that this increase is maladaptive to the heart subject to pressure overload, more recent reports have overwhelmingly supported that myocardial ALP insufficiency results from chronic pressure overload and contributes to maladaptive cardiac remodeling and heart failure. This review examines multiple lines of preclinical evidence derived from recent studies regarding the role of autophagic dysfunction in pressure-overloaded hearts, attempts to reconcile the discrepancies, and proposes that resuming or improving ALP flux through coordinated enhancement of both the formation and the removal of autophagosomes would benefit the treatment of cardiac hypertrophy and heart failure resulting from chronic pressure overload.

scholarly journals Loss of Endothelial Hypoxia Inducible Factor‐Prolyl Hydroxylase 2 Induces Cardiac Hypertrophy and Fibrosis

2021 ◽  
Author(s):  
Zhiyu Dai ◽  
Jianding Cheng ◽  
Bin Liu ◽  
Dan Yi ◽  
Anlin Feng ◽  
...  
Keyword(s):  
Heart Failure ◽  
Endothelial Cells ◽  
Left Ventricular Hypertrophy ◽  
Cardiac Hypertrophy ◽  
Ventricular Hypertrophy ◽  
Hypoxia Inducible Factor ◽  
Left Ventricular ◽  
Sequencing Analysis ◽  
Dependent Manner

Background Cardiac hypertrophy and fibrosis are common adaptive responses to injury and stress, eventually leading to heart failure. Hypoxia signaling is important to the (patho)physiological process of cardiac remodeling. However, the role of endothelial PHD2 (prolyl‐4 hydroxylase 2)/hypoxia inducible factor (HIF) signaling in the pathogenesis of cardiac hypertrophy and heart failure remains elusive. Methods and Results Mice with Egln1 Tie2Cre ( Tie2 ‐Cre‐mediated deletion of Egln1 [encoding PHD2]) exhibited left ventricular hypertrophy evident by increased thickness of anterior and posterior wall and left ventricular mass, as well as cardiac fibrosis. Tamoxifen‐induced endothelial Egln1 deletion in adult mice also induced left ventricular hypertrophy and fibrosis. Additionally, we observed a marked decrease of PHD2 expression in heart tissues and cardiovascular endothelial cells from patients with cardiomyopathy. Moreover, genetic ablation of Hif2a but not Hif1a in Egln1 Tie2Cre mice normalized cardiac size and function. RNA sequencing analysis also demonstrated HIF‐2α as a critical mediator of signaling related to cardiac hypertrophy and fibrosis. Pharmacological inhibition of HIF‐2α attenuated cardiac hypertrophy and fibrosis in Egln1 Tie2Cre mice. Conclusions The present study defines for the first time an unexpected role of endothelial PHD2 deficiency in inducing cardiac hypertrophy and fibrosis in an HIF‐2α–dependent manner. PHD2 was markedly decreased in cardiovascular endothelial cells in patients with cardiomyopathy. Thus, targeting PHD2/HIF‐2α signaling may represent a novel therapeutic approach for the treatment of pathological cardiac hypertrophy and failure.

Sign in / Sign up

Export Citation Format

Share Document