1
|
Suarez PZ, Natali AJ, Mill JG, de Rezende LMT, Soares LL, Drummond FR, Cardoso LCC, Reis ECC, Lavorato VN, Carneiro-Júnior MA. Effects of moderate-continuous and high-intensity interval aerobic training on cardiac function of spontaneously hypertensive rats. Exp Biol Med (Maywood) 2022; 247:1691-1700. [PMID: 35880885 PMCID: PMC9597206 DOI: 10.1177/15353702221110823] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The aim of this study was to verify the effects of moderate-intensity continuous (MICT) and high-intensity interval (HIIT) aerobic training on cardiac morphology and function and the mechanical properties of single cardiomyocytes in spontaneously hypertensive rats (SHR) in the compensated phase of hypertension. Sixteen-week-old male SHR and normotensive Wistar (WIS) rats were allocated to six groups of six animals each: SHR CONT or WIS CONT (control); SHR MICT or WIS MICT (underwent MICT, 30 min/day, five days per week for eight weeks); and SHR HIIT or WIS HIIT (underwent HIIT, 30 min/day, five days per week for eight weeks). Total exercise time until fatigue and maximum running speed were determined using a maximal running test before and after the experimental period. Systolic (SAP), diastolic (DAP), and mean (MAP) blood pressures were measured using tail plethysmography before and after the experimental period. Echocardiographic evaluations were performed at the end of the experimental period. The rats were euthanized after in vivo assessments, and left ventricular myocytes were isolated to evaluate global intracellular Ca2+ transient ([Ca2+]i) and contractile function. Cellular measurements were performed at basal temperature (~37°C) at 3, 5, and 7 Hz. The results showed that both training programs increased total exercise time until fatigue and, consequently, maximum running speed. In hypertensive rats, MICT decreased SAP, DAP, MAP, interventricular septal thickness during systole and diastole, and the contraction amplitude at 5 Hz. HIIT increased heart weight and left ventricular wall thickness during systole and diastole and reduced SAP, MAP, and the time to peak [Ca2+]i at all pacing frequencies. In conclusion, both aerobic training protocols promoted beneficial adaptations to cardiac morphology, function, and mechanical properties of single cardiomyocytes in SHR.
Collapse
Affiliation(s)
- Pedro Z Suarez
- Laboratory of Exercise Biology,
Department of Physical Education, Universidade Federal de Viçosa (UFV), Viçosa
36570-000, Brazil
| | - Antônio J Natali
- Laboratory of Exercise Biology,
Department of Physical Education, Universidade Federal de Viçosa (UFV), Viçosa
36570-000, Brazil
| | - José G Mill
- Department of Physiological Sciences,
Universidade Federal do Espírito Santo (UFES), Vitória 29075-210, Brazil
| | - Leonardo MT de Rezende
- Laboratory of Exercise Biology,
Department of Physical Education, Universidade Federal de Viçosa (UFV), Viçosa
36570-000, Brazil
| | - Leôncio L Soares
- Laboratory of Exercise Biology,
Department of Physical Education, Universidade Federal de Viçosa (UFV), Viçosa
36570-000, Brazil
| | - Filipe R Drummond
- Department of General Biology,
Universidade Federal de Viçosa (UFV), Viçosa 36570-000, Brazil
| | - Lucas CC Cardoso
- Laboratory of Exercise Biology,
Department of Physical Education, Universidade Federal de Viçosa (UFV), Viçosa
36570-000, Brazil
| | - Emily CC Reis
- Department of Veterinary Medicine,
Universidade Federal de Viçosa (UFV), Viçosa 36570-000, Brazil
| | - Victor N Lavorato
- Department of Physical Education,
Centro Universitário Governador Ozanam Coelho (UNIFAGOC), Ubá 36506-022,
Brazil
| | - Miguel A Carneiro-Júnior
- Laboratory of Exercise Biology,
Department of Physical Education, Universidade Federal de Viçosa (UFV), Viçosa
36570-000, Brazil,Miguel A Carneiro-Júnior.
| |
Collapse
|
2
|
Al Mukaddim R, Weichmann AM, Taylor R, Hacker TA, Pier T, Hardin J, Graham M, Mitchell CC, Varghese T. Murine cardiac fibrosis localization using adaptive Bayesian cardiac strain imaging in vivo. Sci Rep 2022; 12:8522. [PMID: 35595876 PMCID: PMC9122999 DOI: 10.1038/s41598-022-12579-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 04/11/2022] [Indexed: 12/19/2022] Open
Abstract
An adaptive Bayesian regularized cardiac strain imaging (ABR-CSI) algorithm for in vivo murine myocardial function assessment is presented. We report on 31 BALB/CJ mice (n = 17 females, n = 14 males), randomly stratified into three surgical groups: myocardial infarction (MI, n = 10), ischemia–reperfusion (IR, n = 13) and control (sham, n = 8) imaged pre-surgery (baseline- BL), and 1, 2, 7 and 14 days post-surgery using a high frequency ultrasound imaging system (Vevo 2100). End-systole (ES) radial and longitudinal strain images were used to generate cardiac fibrosis maps using binary thresholding. Percentage fibrotic myocardium (PFM) computed from regional fibrosis maps demonstrated statistically significant differences post-surgery in scar regions. For example, the MI group had significantly higher PFMRadial (%) values in the anterior mid region (p = 0.006) at Day 14 (n = 8, 42.30 ± 14.57) compared to BL (n = 12, 1.32 ± 0.85). A random forest classifier automatically detected fibrotic regions from ground truth Masson’s trichrome stained histopathology whole slide images. Both PFMRadial (r = 0.70) and PFMLongitudinal (r = 0.60) results demonstrated strong, positive correlation with PFMHistopathology (p < 0.001).
Collapse
Affiliation(s)
| | - Ashley M Weichmann
- Small Animal Imaging and Radiotherapy Facility, UW-Madison, Madison, USA
| | - Rachel Taylor
- Cardiovascular Physiology Core Facility, UW-Madison, Madison, USA
| | - Timothy A Hacker
- Cardiovascular Physiology Core Facility, UW-Madison, Madison, USA
| | - Thomas Pier
- Experimental Animal Pathology Lab, UW-Madison, Madison, USA
| | - Joseph Hardin
- Experimental Animal Pathology Lab, UW-Madison, Madison, USA
| | - Melissa Graham
- Comparative Pathology Laboratory, Research Animal Resources and Compliance (RARC), UW-Madison, Madison, USA
| | - Carol C Mitchell
- Medicine/Division of Cardiovascular Medicine, UW-Madison, Madison, USA
| | - Tomy Varghese
- Medical Physics, University of Wisconsin (UW)-Madison, Madison, USA.
| |
Collapse
|
3
|
Costa BM, Mengal V, Brasil GA, Peluso AA, Treebak JT, Endlich PW, de Almeida SA, de Abreu GR. Ellagic Acid Prevents Myocardial Infarction-induced Left Ventricular Diastolic Dysfunction in Ovariectomized Rats. J Nutr Biochem 2022; 105:108990. [PMID: 35331902 DOI: 10.1016/j.jnutbio.2022.108990] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 11/18/2021] [Accepted: 02/22/2022] [Indexed: 12/07/2022]
Abstract
Estrogen deficiency is associated with increased oxidative stress, which can contribute to left ventricular diastolic dysfunction (LVDD). We hypothesized that oral treatment with ellagic acid (EA), a potent and natural antioxidant compound, can improve MI-induced LVDD in ovariectomized rats, by reducing the formation of reactive oxygen species (ROS). Ovariectomized rats MI-induced LVDD followed by treatment with vehicle (DD) or EA (DD+EA) for 4 weeks. Non-LVDD-induced rats treated with vehicle (S) or EA (S+EA) were used as controls. Left ventricular systolic pressure: LVSP; left ventricular end-diastolic pressure: LVEDP; maximum rate of pressure rise: +dP/dt and fall: -dP/dt) were evaluated in all animals after treatment. Left ventricle superoxide anion formation was quantified in situ by fluorescence. Phospho-CAMKII, SOD2, catalase and gp91-phox abundances were evaluated by Western blot analyses. SOD and catalase activities were measured by spectrophotometry. The results showed that the LVEDP was significantly increased in both DD and DD+EA groups compared to S and S+EA. However, LVEDP in the DD+EA group was significantly decreased compared to DD, indicating an EA-mediated effect. In the DD group, superoxide production and gp91-phox protein abundance were increased while SOD2 abundance was decreased when compared to the S and S+EA groups. An increase in SOD activity was also observed in the DD+EA group. EA treatment reduced CaMKII phosphorylation in the DD+EA group compared to the DD. We concluded that EA treatment attenuated diastolic dysfunction in our experimental model, via reduction of ROS and CaMKII activity, indicating EA as a promising natural therapeutic option for cardiac dysfunction.
Collapse
Affiliation(s)
- Bruno Maia Costa
- Department of Physiological Sciences, Health Sciences Center, Federal University of Espírito Santo, Vitória, ES, Brazil
| | - Vinícius Mengal
- Department of Physiological Sciences, Health Sciences Center, Federal University of Espírito Santo, Vitória, ES, Brazil
| | | | - Antônio Augusto Peluso
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Jonas T Treebak
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Patrick Wander Endlich
- Faculdade de Medicina do Mucuri, Multicentric Post-Graduate Program in Physiological Sciences, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Teófilo Otoni, MG, Brazil
| | - Simone Alves de Almeida
- Department of Physiological Sciences, Health Sciences Center, Federal University of Espírito Santo, Vitória, ES, Brazil.
| | - Gláucia Rodrigues de Abreu
- Department of Physiological Sciences, Health Sciences Center, Federal University of Espírito Santo, Vitória, ES, Brazil
| |
Collapse
|
4
|
Guo Y, Zhang C, Ye T, Chen X, Liu X, Chen X, Sun Y, Qu C, Liang J, Shi S, Yang B. Pinocembrin ameliorates arrhythmias in rats with chronic ischaemic heart failure. Ann Med 2021; 53:830-840. [PMID: 34060948 PMCID: PMC8172224 DOI: 10.1080/07853890.2021.1927168] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVE Ventricular arrhythmias (VAs) are a common complication of chronic ischaemic heart failure (CIHF). The purpose of this study is to investigate the efficacy of pinocembrin in a rat model of VAs induced by CIHF and further examine the possible mechanism. METHODS Rats were subjected to ligation of left anterior descending coronary artery to mimic CIHF and then received pinocembrin treatment daily for 2 months. The vivo electrophysiology were performed to determine the effect of pinocembrin on ventricular electrical activity. The expression of Cav1.2, Kv4.2, and NGF was determined by Western blot. The structural change of ventricle was tested by the Echocardiography, Masson staining, and HE staining. The effect of pinocembrin on sympathetic nerve-related markers was detected by the immunostaining and the ELISA was used to test for biomarkers associated with heart failure. RESULTS Pinocembrin increased the expression of ion channel protein Cav1.2 and Kv4.3, ameliorated the shortening of action potential duration (APD) and reduced the incidence and duration of ventricular fibrillation (VF). Pinocembrin also reduced the expression of nerve growth factor (NGF) and improved the autonomic nerve remodelling. In addition, pinocembrin reduced the area of infarct area and myocardial fibrosis, accompanied by increasing the expression of connexin protein 43 (CX43). CONCLUSION We demonstrate that pinocembrin reduces cardiac nerve remodelling and protects against Vas induced by CIHF. The findings suggest that pinocembrin can be a promising candidate for the treatment of VAs.
Collapse
Affiliation(s)
- Yan Guo
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Cui Zhang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Tianxin Ye
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Xiuhuan Chen
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Xin Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Xiaoli Chen
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Yazhou Sun
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Chuan Qu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Jinjun Liang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Shaobo Shi
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Bo Yang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.,Cardiovascular Research Institute, Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| |
Collapse
|
5
|
Pharmacological Exploration of Phenolic Compound: Raspberry Ketone-Update 2020. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10071323. [PMID: 34209554 PMCID: PMC8309185 DOI: 10.3390/plants10071323] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/17/2021] [Accepted: 06/25/2021] [Indexed: 02/06/2023]
Abstract
Raspberry ketone (RK) is an aromatic phenolic compound naturally occurring in red raspberries, kiwifruit, peaches, and apples and reported for its potential therapeutic and nutraceutical properties. Studies in cells and rodents have suggested an important role for RK in hepatic/cardio/gastric protection and as an anti-hyperlipidemic, anti-obesity, depigmentation, and sexual maturation agent. Raspberry ketone-mediated activation of peroxisome proliferator-activated receptor-α (PPAR-α) stands out as one of its main modes of action. Although rodent studies have demonstrated the efficacious effects of RK, its mechanism remains largely unknown. In spite of a lack of reliable human research, RK is marketed as a health supplement, at very high doses. In this review, we provide a compilation of scientific research that has been conducted so far, assessing the therapeutic properties of RK in several disease conditions as well as inspiring future research before RK can be considered safe and efficacious with limited side effects as an alternative to modern medicines in the treatment of major lifestyle-based diseases.
Collapse
|
6
|
Ruberti OM, Rodrigues B. Estrogen Deprivation and Myocardial Infarction: Role of Aerobic Exercise Training, Inflammation and Metabolomics. Curr Cardiol Rev 2021; 16:292-305. [PMID: 31362678 PMCID: PMC7903506 DOI: 10.2174/1573403x15666190729153026] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 07/01/2019] [Accepted: 07/09/2019] [Indexed: 12/15/2022] Open
Abstract
In general, postmenopausal women present higher mortality, and worse prognosis after myocardial infarction (MI) compared to men, due to estrogen deficiency. After MI, cardiovascular alterations occur such as the autonomic imbalance and the pro-inflammatory cytokines increase. In this sense, therapies that aim to minimize deleterious effects caused by myocardial ischemia are important. Aerobic training has been proposed as a promising intervention in the prevention of cardiovascular diseases. On the other hand, some studies have attempted to identify potential biomarkers for cardiovascular diseases or specifically for MI. For this purpose, metabolomics has been used as a tool in the discovery of cardiovascular biomarkers. Therefore, the objective of this work is to discuss the changes involved in ovariectomy, myocardial infarction, and aerobic training, with emphasis on inflammation and metabolism.
Collapse
Affiliation(s)
- Olívia M Ruberti
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas, Campinas, Brazil
| | - Bruno Rodrigues
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas, Campinas, Brazil
| |
Collapse
|
7
|
Sfrp1 protects against acute myocardial ischemia (AMI) injury in aged mice by inhibiting the Wnt/β-catenin signaling pathway. J Cardiothorac Surg 2021; 16:12. [PMID: 33468190 PMCID: PMC7814560 DOI: 10.1186/s13019-020-01389-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 12/28/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Aged patients suffering from acute myocardial ischemia (AMI) exhibit an increased mortality rate and worse prognosis, and a more effective treatment is currently in need. In the present study, we investigated potent targets related to Wnt/β-catenin pathway deregulation for AMI injury treatment. METHODS In the present study, AAV-Sfrp1 was transduced into the myocardium of aged mice, and an AMI model was established in these aged mice to study the effect and molecular mechanism of Sfrp1 overexpression on AMI-induced injury. RESULTS The results showed that Sfrp1 was successfully overexpressed in the myocardium of aged mice and remarkably reduced Wnt/β-catenin pathway activity in aged mice after AMI, effectively reducing the degree of myocardial fibrosis, inhibiting cardiomyocyte apoptosis, and improving cardiac function. We revealed that the exogenous introduction of Sfrp1 could be considered a promising strategy for improving post-AMI injury in aged mice by inhibiting Wnt/β-catenin pathway activity. CONCLUSIONS In conclusion, the Wnt/β-catenin pathway potentially represents a key target in AMI in aged mice. Sfrp1 might be used as a small molecule gene therapy drug to improve heart function, reduce the degree of myocardial fibrosis, inhibit cardiomyocyte apoptosis and reduce AMI injury in aged mice by inhibiting the Wnt/β-catenin pathway, thereby effectively protecting aged hearts from AMI injury.
Collapse
|
8
|
Abstract
Each year 790,000 people in the United States suffer from a myocardial infarction. This results in the permanent loss of cardiomyocytes and an irreversible loss of cardiac function. Current therapies lower mortality rates, but do not address the core pathology, which opens a pathway to step-wise heart failure. Utilizing stem cells to regenerate the dead tissue is a potential method to reverse these devastating effects. Several clinical trials have already demonstrated the safety of stem cell therapy. In this review, we highlight clinical trials, which have utilized various stem cell lineages, and discuss areas for future research.
Collapse
|
9
|
Hadaya J, Ardell JL. Autonomic Modulation for Cardiovascular Disease. Front Physiol 2020; 11:617459. [PMID: 33414727 PMCID: PMC7783451 DOI: 10.3389/fphys.2020.617459] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 11/25/2020] [Indexed: 12/11/2022] Open
Abstract
Dysfunction of the autonomic nervous system has been implicated in the pathogenesis of cardiovascular disease, including congestive heart failure and cardiac arrhythmias. Despite advances in the medical and surgical management of these entities, progression of disease persists as does the risk for sudden cardiac death. With improved knowledge of the dynamic relationships between the nervous system and heart, neuromodulatory techniques such as cardiac sympathetic denervation and vagal nerve stimulation (VNS) have emerged as possible therapeutic approaches for the management of these disorders. In this review, we present the structure and function of the cardiac nervous system and the remodeling that occurs in disease states, emphasizing the concept of increased sympathoexcitation and reduced parasympathetic tone. We review preclinical evidence for vagal nerve stimulation, and early results of clinical trials in the setting of congestive heart failure. Vagal nerve stimulation, and other neuromodulatory techniques, may improve the management of cardiovascular disorders, and warrant further study.
Collapse
Affiliation(s)
- Joseph Hadaya
- University of California, Los Angeles (UCLA) Cardiac Arrhythmia Center, David Geffen School of Medicine, Los Angeles, CA, United States.,UCLA Neurocardiology Research Program of Excellence, UCLA, Los Angeles, CA, United States.,Molecular, Cellular, and Integrative Physiology Program, UCLA, Los Angeles, CA, United States
| | - Jeffrey L Ardell
- University of California, Los Angeles (UCLA) Cardiac Arrhythmia Center, David Geffen School of Medicine, Los Angeles, CA, United States.,UCLA Neurocardiology Research Program of Excellence, UCLA, Los Angeles, CA, United States
| |
Collapse
|
10
|
Kevrekidis DP, Brousa E, Mastrogianni O, Orfanidis A, Gika HG, Raikos N. Risk factors for fatal drowning in a Greek region: a retrospective case-control study. Inj Prev 2020; 27:316-323. [PMID: 32769124 DOI: 10.1136/injuryprev-2020-043788] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 07/02/2020] [Accepted: 07/04/2020] [Indexed: 11/04/2022]
Abstract
BACKGROUND Fatal drowning is one of the leading causes of unintentional injury mortality worldwide and a persistent public health concern in Greece. While several pathologic and sociodemographic contributing factors have been previously identified, these have not been extensively investigated in conjunction with the effects of psychoactive substances. METHODS A retrospective case-control study of drowning deaths was conducted in the Greek regions of Northern Greece and Thessaly during a 10-year period. A regression model was constructed examining differences in detected substances, autopsy findings and sociodemographic characteristics between 240 victims of unintentional fatal submersion and 480 victims of other causes of sudden or violent death. RESULTS The majority of victims were males (69.4%) and foreign nationality was associated with increased odds of drowning. Cardiomegaly and coronary bypass grafts were significantly more likely to have been recorded among drowning victims, while the frequency of other circulatory system disorders was also elevated. Several of these findings were potential arrhythmogenic substrates which could adversely interact with the diving reflex. Selective serotonin reuptake inhibitors (SSRIs) were the most commonly detected pharmacological group (9.0%), and along with tramadol, there was an increased likelihood of exposure to them. These drugs have been previously associated with QT prolongation and other adverse effects which may contribute to fatal outcomes in a seawater environment. In contrast, there was a decreased risk of exposure to dependence-inducing drugs and paracetamol. CONCLUSIONS Male sex, older age, foreign nationality and cardiovascular disease predisposed individuals to an elevated risk of fatal submersion. SSRI antidepressants and tramadol may contribute to this outcome.
Collapse
Affiliation(s)
- Dimitrios Phaedon Kevrekidis
- Laboratory of Forensic Medicine and Toxicology, Department of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Evdokia Brousa
- Laboratory of Forensic Medicine and Toxicology, Department of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | | | - Amvrosios Orfanidis
- Laboratory of Forensic Medicine and Toxicology, Department of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Helen G Gika
- Laboratory of Forensic Medicine and Toxicology, Department of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Nikolaos Raikos
- Laboratory of Forensic Medicine and Toxicology, Department of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| |
Collapse
|
11
|
Abstract
Cardiovascular disease (CVD) is still a factor of mortality in the whole world. Through canonical and noncanonical pathways and with different receptors, the Wnt/β-catenin signaling pathway plays an essential role in response to heart injuries. Wnt regulates the mobilization and proliferation of cells in endothelium and epicardium in an infarcted heart. Therefore, with its profibrotic effects as well as its antagonism with other proteins, Wnt/β-catenin signaling pathway leads to beneficial effects on fibrosis and cardiac remodeling in myocardium. In addition, Wnt increases the proliferation and differentiation of cardiac progenitors in an ischemic heart. Complex interactions and dual activity of Wnt, the changes in its expression, and mutations that can change its activity during heart development have an adverse effect on cardiac myocardium after injury. However, targeting the Wnt in myocardium with cellular and molecular pathways can be suggested to improve and repair ischemic heart. Given these challenges, in this review article, we deal with the role of Wnt/β-catenin signaling pathway as well as its interactions with other cells and molecules in an ischemic myocardium.
Collapse
|
12
|
Carneiro Júnior MA, Prímola-Gomes TN, Quintão Júnior JF, Drummond LR, Lavorato VN, Drummond FR, Felix LB, Oliveira EMD, Mill JG, Natali AJ. LOW-INTENSITY ENDURANCE TRAINING AND RIGHT VENTRICULAR MYOCYTES OF HYPERTENSIVE RATS. REV BRAS MED ESPORTE 2019. [DOI: 10.1590/1517-869220192503170429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT Introduction The structural and mechanical adaptations of the right ventricular (RV) myocytes in response to hypertension associated with low-intensity endurance training (LIET) have not been studied in experimental models. Objective To determine the effects of LIET on the structural and mechanical properties of RV myocytes in spontaneously hypertensive rats (SHRs). Methods Male SHRs and normotensive Wistar rats (age: 16 weeks) were allocated to groups (n=7): WIS (Wistar Controls); SHR-C (SHR Controls) and SHR-T (SHR Trained; 60 min/day, 50-60% of maximal exercise capacity, 5 days/week for 8 weeks). Systolic arterial pressure (SAP), isolated RV myocyte dimensions, contractility, intracellular Ca2+ transient ([Ca2+]i), and ventricular Ca2+ regulatory proteins were measured. The statistical analysis was performed by one-way ANOVA followed by the Tukey post hoc test (α=5%). Results LIET reduced the SAP in SHR animals (SHR-C, 164 ± 2 mmHg vs. SHR-T, 152 ± 4 mmHg; P<0.05). Hypertension increased cell length (WIS, 156.8 ± 2.7 µm; SHR-C, 166.6 ± 3.1 µm; P<0.05) but did not affect cell width or volume (P>0.05). LIET did not change the cell dimensions in the SHR-T. Neither hypertension nor LIET affected myocyte contractility or the expression of Ca2+ regulatory proteins in the RV of the SHR-C and SHR-T groups. Hypertension did not affect the amplitude of the [Ca2+]i transient or the time to half resting level (P>0.05), but increased the time to peak (WIS, 58 ± 1 ms vs. SHR-C, 79 ± 2 ms; P<0.05). LIET increased the amplitude of the [Ca2+]i transient (WIS, 2.28 ± 0.07 F/F0 and SHR-C, 2.48 ± 0.08 F/F0 vs. SHR-T, 2.87 ± 0.08 F/F0 P<0.05), but did not alter the times to peak or to half resting level. Conclusion LIET had no effect on the structural and mechanical properties of RV myocytes in the SHRs, although it increased the amplitude of the [Ca2+]i transient and reduced the SAP. Level of evidence I, Therapeutic Studies - Investigating the Results of Treatment.
Collapse
|
13
|
Veiga ECA, Antônio EL, Santos AA, Lemes B, Bocalini DS, Picollo C, Levy RF, Martins FL, Girardi ACC, Serra AJ, Tucci PJF. Delayed Reperfusion-Coronary Artery Reperfusion Close to Complete Myocardial Necrosis Benefits Remote Myocardium and Is Enhanced by Exercise. Front Physiol 2019; 10:157. [PMID: 30899225 PMCID: PMC6416202 DOI: 10.3389/fphys.2019.00157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 02/08/2019] [Indexed: 11/13/2022] Open
Abstract
The present study aimed to analyze the effects of reperfusion of a distant coronary artery on cardiac function, the ultrastructure, and the molecular environment of the remote myocardium immediately after the completion of myocardial regional necrosis: delayed reperfusion (DR). Additionally, the effects of prior exercise on the outcomes of DR were investigated. Female rats with permanent occlusion or delayed reperfusion were randomly assigned to an exercise (swimming, 1 h/day, 5 days/week for 8 weeks) or sedentary protocol. Thus, the study included the following four groups: sedentary permanent occlusion, exercise permanent occlusion, sedentary delayed reperfusion, and exercise delayed reperfusion. The descending coronary artery was occluded for 1 h. Reperfusion was confirmed by contrast echocardiography, and the rats were observed for 4 weeks. Permanent occlusion and DR caused similar myocardial infarction sizes among the four groups. Interestingly, exercise significantly decreased the mortality rate. Delayed reperfusion resulted in significant benefits, including enhanced hemodynamics and papillary muscle contraction, as well as reduced apoptosis and collagen content. Protein calcium kinetics did not change. Meanwhile, developed tension and the Frank–Starling mechanism were enhanced, suggesting that calcium sensitivity was intensified in myofilaments. Remarkable remote myocardial benefits occurred after distant DR, and prior exercise intensified cardiac recovery. Our findings provide valuable information about DR. Our data might explain the better clinical outcomes in recent studies showing that late reperfusion could improve heart failure in patients with myocardial infarction. In conclusion, DR has remote myocardial benefits, including inotropism enhancement, pulmonary congestion reduction, and collagen and apoptosis attenuation, which are enhanced by prior exercise.
Collapse
Affiliation(s)
- Eduardo C A Veiga
- Laboratory of Physiology and Cardiac Pathophysiology, Department of Medicine, Federal University of São Paulo, São Paulo, Brazil
| | - Ednei L Antônio
- Laboratory of Physiology and Cardiac Pathophysiology, Department of Medicine, Federal University of São Paulo, São Paulo, Brazil
| | - Alexandra A Santos
- Laboratory of Physiology and Cardiac Pathophysiology, Department of Medicine, Federal University of São Paulo, São Paulo, Brazil
| | - Brunno Lemes
- Laboratory of Physiology and Cardiac Pathophysiology, Department of Medicine, Federal University of São Paulo, São Paulo, Brazil
| | - Danilo S Bocalini
- Center of physical education and sports, Federal University of Espírito Santo, Vitória, Brazil
| | - Camila Picollo
- Laboratory of Physiology and Cardiac Pathophysiology, Department of Medicine, Federal University of São Paulo, São Paulo, Brazil
| | - Rosely F Levy
- Department of Physiology, Federal University of Paraíba, Paraíba, Brazil
| | - Flavia L Martins
- Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| | - Adriana Castello Costa Girardi
- Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| | - Andrey J Serra
- Laboratory of Physiology and Cardiac Pathophysiology, Department of Medicine, Federal University of São Paulo, São Paulo, Brazil
| | - Paulo J F Tucci
- Laboratory of Physiology and Cardiac Pathophysiology, Department of Medicine, Federal University of São Paulo, São Paulo, Brazil
| |
Collapse
|
14
|
Radley G, Pieper IL, Ali S, Bhatti F, Thornton CA. The Inflammatory Response to Ventricular Assist Devices. Front Immunol 2018; 9:2651. [PMID: 30498496 PMCID: PMC6249332 DOI: 10.3389/fimmu.2018.02651] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 10/26/2018] [Indexed: 12/27/2022] Open
Abstract
The therapeutic use of ventricular assist devices (VADs) for end-stage heart failure (HF) patients who are ineligible for transplant has increased steadily in the last decade. In parallel, improvements in VAD design have reduced device size, cost, and device-related complications. These complications include infection and thrombosis which share underpinning contribution from the inflammatory response and remain common risks from VAD implantation. An added and underappreciated difficulty in designing a VAD that supports heart function and aids the repair of damaged myocardium is that different types of HF are accompanied by different inflammatory profiles that can affect the response to the implanted device. Circulating inflammatory markers and changes in leukocyte phenotypes receive much attention as biomarkers for mortality and disease progression. However, they are seldom used to monitor progress during and outcomes from VAD therapy or during the design phase for new devices. Even the partial reversal of heart damage associated with heart failure is a desirable outcome from VAD use. Therefore, improved understanding of the interplay between VADs and the recipient's inflammatory response would potentially increase their uptake, improve patient lives, and fuel research related to other blood-contacting medical devices. Here we provide a review of what is currently known about inflammation in heart failure and how this inflammatory profile is altered in heart failure patients receiving VAD therapy.
Collapse
Affiliation(s)
- Gemma Radley
- Swansea University Medical School, Swansea, United Kingdom.,Calon Cardio-Technology Ltd, Institute of Life Science, Swansea, United Kingdom
| | - Ina Laura Pieper
- Swansea University Medical School, Swansea, United Kingdom.,Scandinavian Real Heart AB, Västerås, Sweden
| | - Sabrina Ali
- Calon Cardio-Technology Ltd, Institute of Life Science, Swansea, United Kingdom
| | - Farah Bhatti
- Department of Cardiology, Morriston Hospital, Abertawe Bro Morgannwg University Health Board, Swansea, United Kingdom
| | | |
Collapse
|
15
|
Castardeli C, Sartório CL, Pimentel EB, Forechi L, Mill JG. The ACE 2 activator diminazene aceturate (DIZE) improves left ventricular diastolic dysfunction following myocardial infarction in rats. Biomed Pharmacother 2018; 107:212-218. [DOI: 10.1016/j.biopha.2018.07.170] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 07/26/2018] [Accepted: 07/31/2018] [Indexed: 01/10/2023] Open
|
16
|
Hua Y, Chen H, Zhao X, Liu M, Jin W, Yan W, Wu Y, Tan Z, Fan H, Wu Y, Xie L, Zhang W, Liu B, Zhou Y. Alda‑1, an aldehyde dehydrogenase‑2 agonist, improves long‑term survival in rats with chronic heart failure following myocardial infarction. Mol Med Rep 2018; 18:3159-3166. [PMID: 30066916 PMCID: PMC6102689 DOI: 10.3892/mmr.2018.9309] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Accepted: 04/26/2018] [Indexed: 12/26/2022] Open
Abstract
Alda‑1, an aldehyde dehydrogenase 2 (ALDH2) agonist, has been demonstrated to reduce injury caused by acute myocardial infarction (MI) and ischemia/reperfusion. The present study aimed to investigate whether oral administration of Alda‑1 improved long‑term survival of rats with chronic heart failure (CHF) post‑MI. MI model rats treated daily with Alda‑1 exhibited an increase in 20‑week survival rate compared with untreated MI rats. Alda‑1 treatment decreased the heart weight/body weight ratio, collagen volume, left ventricular (LV) internal diameter at the end of diastole and LV internal diameter at the end of systole, while increasing LV ejection fraction with evident LV fractional shortening. Myocardial cell apoptosis index, the activity of caspase‑3 and the expression of cleaved‑caspase‑3 were also reduced by Alda‑1 treatment. The protective effects of Alda‑1 were associated with reduced 4‑hydroxynonenal accumulation. The results of the present study revealed that the long‑term treatment with Alda‑1 prevented the progression of ventricular remodeling and improved the long‑term survival of rats with CHF post‑MI.
Collapse
Affiliation(s)
- Yue Hua
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Hongmei Chen
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Xinyun Zhao
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Min Liu
- School of Public Health, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Wen Jin
- Guangdong Second Provincial General Hospital, Guangzhou, Guangdong 510317, P.R. China
| | - Wen Yan
- Guangdong Second Provincial General Hospital, Guangzhou, Guangdong 510317, P.R. China
| | - Yifen Wu
- Department of Oncology, Dongguan People's Hospital, Dongguan, Guangdong 523059, P.R. China
| | - Zhangbin Tan
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Huijie Fan
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Yuting Wu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Lingpeng Xie
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Wentong Zhang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Bin Liu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Yingchun Zhou
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| |
Collapse
|
17
|
Gabriel-Costa D. The pathophysiology of myocardial infarction-induced heart failure. ACTA ACUST UNITED AC 2018; 25:277-284. [PMID: 29685587 DOI: 10.1016/j.pathophys.2018.04.003] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 03/06/2018] [Accepted: 04/14/2018] [Indexed: 12/20/2022]
Abstract
Heart failure (HF) is a multifactorial disorder and is usually the end stage of many cardiovascular diseases (CVD). HF presents one of the highest morbidity and mortality indices worldwide and high costs to public health organizations. Myocardial infarction (MI) is the most prevalent CVD in the Western world and leads to HF when its management is inadequate. It has a destructive potential for heart cells and abruptly reduces the cardiac output, a clinical condition known as heart dysfunction that might progress to HF. Many acute and chronic adaptations occur due to MI that progress to HF, e.g., neurohumoral hyperactivity, inflammatory response and cardiac remodeling. Herein, we reviewed in simplistic manner the processes involved in setting of MI until the establishment of HF.
Collapse
Affiliation(s)
- Daniele Gabriel-Costa
- Universidade da Força Aérea, Instituto de Ciências da Atividade Física, Programa de Pós-Graduação em Desempenho Humano Operacional, Rio de Janeiro, RJ, Brasil.
| |
Collapse
|
18
|
Ribeiro Júnior RF, Ronconi KS, Jesus ICG, Almeida PWM, Forechi L, Vassallo DV, Guatimosim S, Stefanon I, Fernandes AA. Testosterone deficiency prevents left ventricular contractility dysfunction after myocardial infarction. Mol Cell Endocrinol 2018; 460:14-23. [PMID: 28606867 DOI: 10.1016/j.mce.2017.06.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 05/17/2017] [Accepted: 06/08/2017] [Indexed: 11/30/2022]
Abstract
Testosterone may affect myocardial contractility since its deficiency decreases the contraction and relaxation of the heart. Meanwhile, testosterone replacement therapy has raised concerns because it may worsen cardiac dysfunction and remodeling after myocardial infarction (MI). In this study, we evaluate cardiac contractility 60 days after MI in rats with suppressed testosterone. Male Wistar rats underwent bilateral orchidectomy one week before the ligation of the anterior descending left coronary artery. The animals were divided into orchidectomized (OCT); MI; orchidectomized + MI (OCT + MI); orchidectomized + MI + testosterone (OCT + MI + T) and control (Sham) groups. Eight weeks after MI, papillary muscle contractility was analyzed under increasing calcium (0.62, 1.25, 2.5 and 3.75 mM) and isoproterenol (10-8 to 10-2 M) concentrations. Ventricular myocytes were isolated for intracellular calcium measurements and assessment of Ca2+ handling proteins. Contractility was preserved in the orchidectomized animals after myocardial infarction and was reduced when testosterone was replaced (Ca2+ 3.75 mM: Sham: 608 ± 70 (n = 11); OCT: 590 ± 37 (n = 16); MI: 311 ± 33* (n = 9); OCT + MI: 594 ± 76 (n = 7); OCT + MI + T: 433 ± 38* (n=4), g/g *p < 0.05 vs Sham). Orchidectomy also increased the Ca2+ transient amplitude of the ventricular myocytes and SERCA-2a protein expression levels. PLB phosphorylation levels at Thr17 were not different in the orchidectomized animals compared to the Sham animals but were reduced after testosterone replacement. CAMKII phosphorylation and protein nitrosylation increased in the orchidectomized animals. Our results support the view that testosterone deficiency prevents MI contractility dysfunction by altering the key proteins involved in Ca2+ handling.
Collapse
Affiliation(s)
- R F Ribeiro Júnior
- Department of Physiological Sciences, Universidade Federal do Espírito Santo, Vitória, ES, Brazil.
| | - K S Ronconi
- Department of Physiological Sciences, Universidade Federal do Espírito Santo, Vitória, ES, Brazil
| | - I C G Jesus
- Department of Physiology and Biophysics, Universidade Federal de Minas Gerais, Minas Gerais, MG, Brazil
| | - P W M Almeida
- Department of Physiology and Biophysics, Universidade Federal de Minas Gerais, Minas Gerais, MG, Brazil
| | - L Forechi
- Department of Physiological Sciences, Universidade Federal do Espírito Santo, Vitória, ES, Brazil
| | - D V Vassallo
- Department of Physiological Sciences, Universidade Federal do Espírito Santo, Vitória, ES, Brazil
| | - S Guatimosim
- Department of Physiology and Biophysics, Universidade Federal de Minas Gerais, Minas Gerais, MG, Brazil
| | - I Stefanon
- Department of Physiological Sciences, Universidade Federal do Espírito Santo, Vitória, ES, Brazil
| | - A A Fernandes
- Department of Physiological Sciences, Universidade Federal do Espírito Santo, Vitória, ES, Brazil
| |
Collapse
|
19
|
Xanthine Oxidase Activation Modulates the Endothelial (Vascular) Dysfunction Related to HgCl2 Exposure Plus Myocardial Infarction in Rats. Cardiovasc Toxicol 2017; 18:161-174. [DOI: 10.1007/s12012-017-9427-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
20
|
Gavrilova SA, Markov MA, Berdalin AB, Kurenkova AD, Koshelev VB. Changes in Sympathetic Innervation of the Heart in Rats with Experimental Myocardial Infarction. Effect of Semax. Bull Exp Biol Med 2017; 163:617-619. [PMID: 28948544 DOI: 10.1007/s10517-017-3862-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Indexed: 11/27/2022]
Abstract
The effect of peptide Semax on remodeling of cardiac sympathetic innervation was examined in rats with experimental myocardial infarction. In 28 days after ischemia/reperfusion injury, Semax diminished the growth of sympathetic innervation of ventricular septum, although it produced no effect on the density of β1 and β2 adrenoceptors.
Collapse
Affiliation(s)
- S A Gavrilova
- Department of Physiology and General Pathology, Faculty of Fundamental Medicine, M. V. Lomonosov Moscow State University, Moscow, Russia
| | - M A Markov
- Department of Physiology and General Pathology, Faculty of Fundamental Medicine, M. V. Lomonosov Moscow State University, Moscow, Russia
| | - A B Berdalin
- Department of Physiology and General Pathology, Faculty of Fundamental Medicine, M. V. Lomonosov Moscow State University, Moscow, Russia.
| | - A D Kurenkova
- Department of Physiology and General Pathology, Faculty of Fundamental Medicine, M. V. Lomonosov Moscow State University, Moscow, Russia
| | - V B Koshelev
- Department of Physiology and General Pathology, Faculty of Fundamental Medicine, M. V. Lomonosov Moscow State University, Moscow, Russia
| |
Collapse
|
21
|
Sabbah HN. Silent disease progression in clinically stable heart failure. Eur J Heart Fail 2017; 19:469-478. [PMID: 27976514 PMCID: PMC5396296 DOI: 10.1002/ejhf.705] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 10/21/2016] [Accepted: 11/02/2016] [Indexed: 12/11/2022] Open
Abstract
Heart failure with reduced ejection fraction (HFrEF) is a progressive disorder whereby cardiac structure and function continue to deteriorate, often despite the absence of clinically apparent signs and symptoms of a worsening disease state. This silent yet progressive nature of HFrEF can contribute to the increased risk of death-even in patients who are 'clinically stable', or who are asymptomatic or only mildly symptomatic-because it often goes undetected and/or undertreated. Current therapies are aimed at improving clinical symptoms, and several agents more directly target the underlying causes of disease; however, new therapies are needed that can more fully address factors responsible for underlying progressive cardiac dysfunction. In this review, mechanisms that drive HFrEF, including ongoing cardiomyocyte loss, mitochondrial abnormalities, impaired calcium cycling, elevated LV wall stress, reactive interstitial fibrosis, and cardiomyocyte hypertrophy, are discussed. Additionally, limitations of current HF therapies are reviewed, with a focus on how these therapies are designed to counteract the deleterious effects of compensatory neurohumoral activation but do not fully prevent disease progression. Finally, new investigational therapies that may improve the underlying molecular, cellular, and structural abnormalities associated with HF progression are reviewed.
Collapse
|
22
|
Resveratrol-Mediated Expression of KLF15 in the Ischemic Myocardium is Associated with an Improved Cardiac Phenotype. Cardiovasc Drugs Ther 2017; 31:29-38. [PMID: 28064408 DOI: 10.1007/s10557-016-6707-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
PURPOSE Myocardial infarction results in physiological derangements that lead to structural and functional alterations to the myocardium. In addition, oxidative stress potentiates cardiac remodeling and drives disease progression. Unfortunately, treatment with antioxidants in clinical trials have failed to show any therapeutic benefits despite the positive results reported in animal studies, which warrants further investigation into their mechanism(s) of action. Accordingly, the aim of this study was to elucidate a previously unknown mechanism of action for the antioxidant, resveratrol, in the treatment of the ischemic heart. METHODS Male Sprague-Dawley rats underwent four weeks of chronic myocardial ischemia with or without daily resveratrol treatment (10 mg/kg/day). The expression and signaling of Krüppel-like factor 15 (KLF15) were determined by immunoblot and qPCR analyses, respectively. RESULTS Chronic myocardial ischemia reduced the protein expression of KLF15. In parallel, mRNA transcripts of KLF15 gene targets actively involved in cardiac remodeling were robustly increased in untreated hearts. Importantly, daily treatment with resveratrol stimulated KLF15 expression, which was associated with attenuated gene expression and an improved cardiac phenotype. Additionally, we describe a novel role for KLF15 in the regulation of redox homeostasis. CONCLUSION Based on our current findings, it appears that resveratrol treatment induces KLF15 expression, which may, in part, explain its therapeutic efficacy to improve the cardiac phenotype following ischemic injury.
Collapse
|
23
|
Aires R, Pimentel EB, Forechi L, Dantas EM, Mill JG. Time course of changes in heart rate and blood pressure variability in rats with myocardial infarction. ACTA ACUST UNITED AC 2017; 50:e5511. [PMID: 28076450 PMCID: PMC5264537 DOI: 10.1590/1414-431x20165511] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 10/25/2016] [Indexed: 01/01/2023]
Abstract
Our aim was to determine the time course of changes in autonomic balance in the acute
(1 and 3 days), sub-acute (7 days) and chronic (28 days) phases of myocardial
infarction (MI) in rats. Autonomic balance was assessed by temporal and spectral
analyses of blood pressure variability (BPV) and heart rate variability (HRV).
Pulsatile blood pressure (BP) recordings (30 min) were obtained in awake and
unrestrained male Wistar rats (N = 77; 8-10 weeks old) with MI (coronary ligature) or
sham operation (SO). Data are reported as means±SE. The high frequency (HF) component
(n.u.) of HRV was significantly lower in MI-1- (P<0.01) and MI-3-day rats
(P<0.05) than in their time-control groups (SO-1=68±4 vs
MI-1=35.3±4.3; SO-3=71±5.8 vs MI-3=45.2±3.8), without differences
thereafter (SO-7=69.2±4.8 vs MI-7=56±5.8; SO-28=73±4
vs MI-28=66±6.6). A sharp reduction (P<0.05) of BPV
(mmHg2) was observed in the first week after MI (SO-1=8.55±0.80;
SO-3=9.11±1.08; SO-7=7.92±1.10 vs MI-1=5.63±0.73; MI-3=5.93±0.30;
MI-7=5.30±0.25). Normal BPV, however, was observed 4 weeks after MI (SO-28=8.60±0.66
vs MI-28=8.43±0.56 mmHg2; P>0.05). This reduction
was mainly due to attenuation of the low frequency (LF) band of BPV in absolute and
normalized units (SO-1=39.3±7%; SO-3=55±4.5%; SO-7=46.8±4.5%; SO-28=45.7±5%;
MI-1=13±3.5%; MI-3=35±4.7%; MI-7=25±2.8%; MI-28=21.4±2.8%). The results suggest that
the reduction in HRV was associated with decrease of the HF component of HRV
suggesting recovery of the vagal control of heartbeats along the post-infarction
healing period. The depression of BPV was more dependent on the attenuation of the LF
component, which is linked to the baroreflex modulation of the autonomic balance.
Collapse
Affiliation(s)
- R Aires
- Departmento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - E B Pimentel
- Departmento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - L Forechi
- Departmento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - E M Dantas
- Colegiado de Ciências Biológicas, Universidade Federal do Vale do São Francisco, Petrolina, PE, Brasil
| | - J G Mill
- Departmento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| |
Collapse
|
24
|
Shen L, Wang H, Bei Y, Cretoiu D, Cretoiu SM, Xiao J. Formation of New Cardiomyocytes in Exercise. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 999:91-102. [DOI: 10.1007/978-981-10-4307-9_6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
25
|
Briasoulis A, Androulakis E, Christophides T, Tousoulis D. The role of inflammation and cell death in the pathogenesis, progression and treatment of heart failure. Heart Fail Rev 2016; 21:169-76. [PMID: 26872673 DOI: 10.1007/s10741-016-9533-z] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Chronic inflammation underlies a variety of seemingly unrelated conditions including coronary artery disease. The interest in exploring the role of inflammation in heart failure (CHF) arises from earlier observations that circulating pro-inflammatory biomarker levels are elevated in patients with both ischaemic and non-ischaemic cardiomyopathies and correlate with severity of disease and prognosis (McMurray et al. in Eur Heart J 33:1787-1847, 2012; Mosterd and Hoes in Heart 93:1137-1146, 2007; Owan et al. in New Engl J Med 355:251-259, 2006). In acute decompensated HF, pro-inflammatory biomarker levels have been associated with mortality and readmission rates (Cowie et al. in Heart 83:505-510, 2000). Similar to neurohormonal activation and inflammation, production of pro-inflammatory cytokines is a response to stress in an attempt to restore cellular function. However, sustained expression and exposure to cytokines can lead to left ventricular dysfunction, negative inotropic effects, altered cardiac metabolism, myocardial remodelling and HF progression. However, it is unclear whether elevated levels of pro-inflammatory biomarkers, such as high-sensitivity C-reactive protein, signify an ongoing inflammatory process that leads to HF progression, or are merely markers of advanced disease. Beta-blockers, renin-angiotensin-aldosterone axis antagonists, statins and immunosuppressants have been found to decrease the levels of cytokines in small clinical studies of patients with HF (Hobbs et al. in Heart J 28:1128-1134, 2007). However, 'immunomodulatory' approaches applied in the RECOVER, RENAISSANCE, ATTACH, IMAC and ACCLAIM double-blind, placebo-controlled studies had neutral or negative effects on outcomes of patients with HF. In the present review, we focus on the role of inflammation in pathogenesis and progression of the HF, the value of pro-inflammatory cytokines as biomarkers and the potential therapeutic applications of immunomodulation in HF patients.
Collapse
Affiliation(s)
- Alexandros Briasoulis
- Division of Cardiology, Detroit Medical Center, Wayne State University, Detroit, MI, USA.
| | - Emmanuel Androulakis
- Division of Cardiology, Detroit Medical Center, Wayne State University, Detroit, MI, USA.,1st Cardiology Department, Athens University Medical School, Athens, Greece
| | - Theodoros Christophides
- Division of Cardiology, Detroit Medical Center, Wayne State University, Detroit, MI, USA.,1st Cardiology Department, Athens University Medical School, Athens, Greece
| | - Dimitris Tousoulis
- Division of Cardiology, Detroit Medical Center, Wayne State University, Detroit, MI, USA.,1st Cardiology Department, Athens University Medical School, Athens, Greece
| |
Collapse
|
26
|
Järve A, Mühlstedt S, Qadri F, Nickl B, Schulz H, Hübner N, Özcelik C, Bader M. Adverse left ventricular remodeling by glycoprotein nonmetastatic melanoma protein B in myocardial infarction. FASEB J 2016; 31:556-568. [DOI: 10.1096/fj.201600613r] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Accepted: 10/11/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Anne Järve
- Max Delbrück Center for Molecular MedicineBerlinGermany
- Berlin‐Brandenburg School of Regenerative TherapiesBerlinGermany
| | - Silke Mühlstedt
- Max Delbrück Center for Molecular MedicineBerlinGermany
- Faculty of Mathematics and Natural Sciences IHumboldt‐University BerlinGermany
- Berlin Institute of HealthBerlinGermany
| | | | - Bernadette Nickl
- Max Delbrück Center for Molecular MedicineBerlinGermany
- Berlin Institute of HealthBerlinGermany
| | | | | | | | - Michael Bader
- Max Delbrück Center for Molecular MedicineBerlinGermany
- Berlin Institute of HealthBerlinGermany
- Charité‐University MedicineBerlinGermany
- German Center for Cardiovascular Research (DZHK)BerlinGermany
- Institute for BiologyUniversity of LübeckLübeckGermany
| |
Collapse
|
27
|
D'Elia N, D'hooge J, Marwick TH. Association Between Myocardial Mechanics and Ischemic LV Remodeling. JACC Cardiovasc Imaging 2016; 8:1430-1443. [PMID: 26699112 DOI: 10.1016/j.jcmg.2015.10.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 09/30/2015] [Accepted: 10/08/2015] [Indexed: 12/12/2022]
Abstract
The outcomes associated with heart failure after myocardial infarction are still poor. Both global and regional left ventricular (LV) remodeling are associated with the progression of the post-infarct patient to heart failure, but although global remodeling can be accurately measured, regional LV remodeling has been more difficult to investigate. Preliminary evidence suggests that post-MI assessment of LV mechanics using stress and strain may predict global (and possibly regional) LV remodeling. A method of predicting both global and regional LV remodeling might facilitate earlier, targeted, and more extensive clinical intervention in those most likely to benefit from novel interventions such as cell therapy.
Collapse
Affiliation(s)
- Nicholas D'Elia
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | - Jan D'hooge
- Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium
| | - Thomas H Marwick
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia.
| |
Collapse
|
28
|
Abstract
Cardiac control is mediated via a series of reflex control networks involving somata in the (i) intrinsic cardiac ganglia (heart), (ii) intrathoracic extracardiac ganglia (stellate, middle cervical), (iii) superior cervical ganglia, (iv) spinal cord, (v) brainstem, and (vi) higher centers. Each of these processing centers contains afferent, efferent, and local circuit neurons, which interact locally and in an interdependent fashion with the other levels to coordinate regional cardiac electrical and mechanical indices on a beat-to-beat basis. This control system is optimized to respond to normal physiological stressors (standing, exercise, and temperature); however, it can be catastrophically disrupted by pathological events such as myocardial ischemia. In fact, it is now recognized that autonomic dysregulation is central to the evolution of heart failure and arrhythmias. Autonomic regulation therapy is an emerging modality in the management of acute and chronic cardiac pathologies. Neuromodulation-based approaches that target select nexus points of this hierarchy for cardiac control offer unique opportunities to positively affect therapeutic outcomes via improved efficacy of cardiovascular reflex control. As such, understanding the anatomical and physiological basis for such control is necessary to implement effectively novel neuromodulation therapies. © 2016 American Physiological Society. Compr Physiol 6:1635-1653, 2016.
Collapse
Affiliation(s)
- Jeffrey L Ardell
- Los Angeles (UCLA) Cardiac Arrhythmia Center, David Geffen School of Medicine, University of California, Los Angeles, California, USA.,UCLA Neurocardiology Research Center of Excellence, David Geffen School of Medicine, Los Angeles, California, USA
| | - John Andrew Armour
- Los Angeles (UCLA) Cardiac Arrhythmia Center, David Geffen School of Medicine, University of California, Los Angeles, California, USA.,UCLA Neurocardiology Research Center of Excellence, David Geffen School of Medicine, Los Angeles, California, USA
| |
Collapse
|
29
|
Jansen van Vuren E, Malan L, Cockeran M, Scheepers JD, Oosthuizen W, Malan NT. Fibrosis and coronary perfusion - a cardiovascular disease risk in an African male cohort: The SABPA study. Clin Exp Hypertens 2016; 38:482-8. [PMID: 27380493 DOI: 10.3109/10641963.2016.1151524] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Low-grade inflammation has been correlated with risk factors of cardiovascular diseases (CVD). Whether the pro-inflammatory and thrombotic ratio (fibrosis) may contribute to CVD is not known. We therefore aimed to assess whether Cornell Product left ventricular hypertrophy (LVH) is associated with fibrosis and coronary perfusion (silent ischemia) in a bi-ethnic male cohort from South Africa. A cross sectional study was conducted including 165 African and Caucasian men between the ages of 20-65. Fasting blood samples were obtained to measure fibrinogen, C-reactive protein (CRP), interleukin-6 (IL-6), and tumor necrosis factor (TNF-α). Ambulatory blood pressure, ECG and 12 lead ECG measures were obtained to determine silent ischemic events (ST events) and LVH, respectively. Africans revealed more silent ischemia, higher 24 h blood pressure, inflammatory, coagulation as well as fibrosis levels than Caucasians. In a low-grade inflammatory state (CRP > 3 mg/l), Africans revealed higher fibrosis (p ≤ 0.01) values, but lower IL-6 and TNF-α values than Caucasians. Linear regression analyses in several models demonstrated positive associations between silent ischemia and fibrosis [Adj. R(2) 0.23; ß 0.35 (95% CI 0.13, 0.58), p ≤ 0.01]. In a low-grade inflammatory state (CRP>3mg/l), fibrinogen predicted AV-block in African men [OR 3.38 (95% CI 2.24, 4.53); p = 0.04]. Low-grade inflammation may induce AV-block through mechanisms involving fibrosis and ischemia to increase the burden on the heart in African men.
Collapse
Affiliation(s)
- Esmé Jansen van Vuren
- a Hypertension in Africa Research Team (HART) , North-West University , Potchefstroom Campus, South Africa
| | - Leoné Malan
- a Hypertension in Africa Research Team (HART) , North-West University , Potchefstroom Campus, South Africa
| | - Marike Cockeran
- b Medicine Usage in South Africa (MUSA) , North-West University , Potchefstroom Campus, South Africa
| | - Jacobus D Scheepers
- a Hypertension in Africa Research Team (HART) , North-West University , Potchefstroom Campus, South Africa
| | - Woudri Oosthuizen
- a Hypertension in Africa Research Team (HART) , North-West University , Potchefstroom Campus, South Africa
| | - Nicolaas T Malan
- a Hypertension in Africa Research Team (HART) , North-West University , Potchefstroom Campus, South Africa
| |
Collapse
|
30
|
Ardell JL, Andresen MC, Armour JA, Billman GE, Chen PS, Foreman RD, Herring N, O'Leary DS, Sabbah HN, Schultz HD, Sunagawa K, Zucker IH. Translational neurocardiology: preclinical models and cardioneural integrative aspects. J Physiol 2016; 594:3877-909. [PMID: 27098459 DOI: 10.1113/jp271869] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 03/14/2016] [Indexed: 12/15/2022] Open
Abstract
Neuronal elements distributed throughout the cardiac nervous system, from the level of the insular cortex to the intrinsic cardiac nervous system, are in constant communication with one another to ensure that cardiac output matches the dynamic process of regional blood flow demand. Neural elements in their various 'levels' become differentially recruited in the transduction of sensory inputs arising from the heart, major vessels, other visceral organs and somatic structures to optimize neuronal coordination of regional cardiac function. This White Paper will review the relevant aspects of the structural and functional organization for autonomic control of the heart in normal conditions, how these systems remodel/adapt during cardiac disease, and finally how such knowledge can be leveraged in the evolving realm of autonomic regulation therapy for cardiac therapeutics.
Collapse
Affiliation(s)
- J L Ardell
- University of California - Los Angeles (UCLA) Cardiac Arrhythmia Center, David Geffen School of Medicine, Los Angeles, CA, USA.,UCLA Neurocardiology Research Center of Excellence, David Geffen School of Medicine, Los Angeles, CA, USA
| | - M C Andresen
- Department of Physiology and Pharmacology, Oregon Health and Science University, Portland, OR, USA
| | - J A Armour
- University of California - Los Angeles (UCLA) Cardiac Arrhythmia Center, David Geffen School of Medicine, Los Angeles, CA, USA.,UCLA Neurocardiology Research Center of Excellence, David Geffen School of Medicine, Los Angeles, CA, USA
| | - G E Billman
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH, USA
| | - P-S Chen
- The Krannert Institute of Cardiology and Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, USA
| | - R D Foreman
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - N Herring
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK
| | - D S O'Leary
- Department of Physiology, Wayne State University, Detroit, MI, USA
| | - H N Sabbah
- Department of Medicine, Henry Ford Hospital, Detroit, MI, USA
| | - H D Schultz
- Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE, USA
| | - K Sunagawa
- Department of Cardiovascular Medicine, Kyushu University, Fukuoka, Japan
| | - I H Zucker
- Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE, USA
| |
Collapse
|
31
|
Bastakoty D, Saraswati S, Joshi P, Atkinson J, Feoktistov I, Liu J, Harris JL, Young PP. Temporary, Systemic Inhibition of the WNT/β-Catenin Pathway promotes Regenerative Cardiac Repair following Myocardial Infarct. ACTA ACUST UNITED AC 2016; 2. [PMID: 28042617 DOI: 10.16966/2472-6990.111] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
AIMS The WNT/β-catenin pathway is temporarily activated in the heart following myocardial infarction (MI). Despite data from genetic models indicating both positive and negative roles for the WNT pathway depending on the model used, the effect of therapeutic inhibition of WNT pathway on post-injury outcome and the cellular mediators involved are not completely understood. Using a newly available, small molecule, GNF-6231, which averts WNT pathway activation by blocking secretion of all WNT ligands, we sought to investigate whether therapeutic inhibition of the WNT pathway temporarily after infarct can mitigate post injury cardiac dysfunction and fibrosis and the cellular mechanisms responsible for the effects. METHODS AND RESULTS Pharmacologic inhibition of the WNT pathway by post-MI intravenous injection of GNF-6231 in C57Bl/6 mice significantly reduced the decline in cardiac function (Fractional Shortening at day 30: 38.71 ± 4.13% in GNF-6231 treated vs. 34.89 ± 4.86% in vehicle-treated), prevented adverse cardiac remodeling, and reduced infarct size (9.07 ± 3.98% vs. 17.18 ± 4.97%). WNT inhibition augmented proliferation of interstitial cells, particularly in the distal myocardium, inhibited apoptosis of cardiomyocytes, and reduced myofibroblast proliferation in the peri-infarct region. In vitro studies showed that WNT inhibition increased proliferation of Sca1+ cardiac progenitors, improved survival of cardiomyocytes, and inhibited collagen I synthesis by cardiac myofibroblasts. CONCLUSION Systemic, temporary pharmacologic inhibition of the WNT pathway using an orally bioavailable drug immediately following MI resulted in improved function, reduced adverse remodeling and reduced infarct size in mice. Therapeutic WNT inhibition affected multiple aspects of infarct repair: it promoted proliferation of cardiac progenitors and other interstitial cells, inhibited myofibroblast proliferation, improved cardiomyocyte survival, and reduced collagen I gene expression by myofibroblasts. Our data point to a promising role for WNT inhibitory therapeutics as a new class of drugs to drive post-MI repair and prevent heart failure.
Collapse
Affiliation(s)
- Dikshya Bastakoty
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Sarika Saraswati
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Piyush Joshi
- Interdisciplinary Graduate Program, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - James Atkinson
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA; Department of Veterans Affairs Medical Center, Nashville, Tennessee, USA
| | - Igor Feoktistov
- Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Jun Liu
- Genomics Institute of Novartis Research Foundation, San Diego, California, USA
| | - Jennifer L Harris
- Genomics Institute of Novartis Research Foundation, San Diego, California, USA
| | - Pampee P Young
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA; Department of Veterans Affairs Medical Center, Nashville, Tennessee, USA; Department of Internal Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| |
Collapse
|
32
|
Hyperpulsatile pressure, systemic inflammation and cardiac stress are associated with cardiac wall remodeling in an African male cohort: the SABPA study. Hypertens Res 2016; 39:648-53. [PMID: 27169396 DOI: 10.1038/hr.2016.45] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Revised: 03/08/2016] [Accepted: 03/11/2016] [Indexed: 12/19/2022]
Abstract
Inflammation may contribute to an increase in cardiac wall stress through pathways related to cardiac remodeling. Cardiac remodeling is characterized by myocyte hypertrophy, myocyte death and modifications of the extracellular matrix. We sought to explore associations among cardiac remodeling, inflammation and myocardial cell injury in a bi-ethnic cohort of South African men and women. We included 165 men (76 African and 89 Caucasian) and 174 women (80 African and 94 Caucasian) between 20 and 65 years of age. Inflammatory markers used were C-reactive protein (CRP), interleukin-6 and tumor necrosis factor-alpha (TNF-α), whereas troponin T (Trop T) and the N-terminal of pro B-type natriuretic peptide (NT-proBNP) were used as cardiac markers. The frequency of ischemic events (ST segment depression) and left ventricular strain (left ventricular hypertrophy: LVH) were monitored by a 24-h recording of ambulatory blood pressure (BP), ECG and 12-lead standard ECG. Hypertension diagnosed with ambulatory monitoring was more frequent in Africans (53.85 vs. 24.59%; P<0.001), as was the number of ischemic events (6±15 (1; 5) vs. 3±6 (0; 3)). Inflammatory markers (CRP, IL-6 and TNF-α) and the degree of LVH were all significantly higher in Africans (P<0.05). BP was associated (P<0.05) with Trop T in men across ethnic groups. In African men, cardiac stress (NT-proBNP) was associated with TNF-alpha (P<0.001), Trop T (P<0.001) and pulse pressure (P=0.048; adjusted R(2)=0.45). The susceptibility for cardiac wall remodeling appears to increase with hyperpulsatile pressure, low-grade systemic inflammation and ventricular stress, and may lead to the development of future cardiovascular events in African men.
Collapse
|
33
|
Baldo MP, Rodrigues SL, Mill JG. High salt intake as a multifaceted cardiovascular disease: new support from cellular and molecular evidence. Heart Fail Rev 2016; 20:461-74. [PMID: 25725616 DOI: 10.1007/s10741-015-9478-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Scientists worldwide have disseminated the idea that increased dietary salt increases blood pressure. Currently, salt intake in the general population is ten times higher than that consumed in the past and at least two times higher than the current recommendation. Indeed, a salt-rich diet increases cardiovascular morbidity and mortality. For a long time, however, the deleterious effects associated with high salt consumption were only related to the effect of salt on blood pressure. Currently, several other effects have been reported. In some cases, the deleterious effects of high salt consumption are independently associated with other common risk factors. In this article, we gather data on the effects of increased salt intake on the cardiovascular system, from infancy to adulthood, to describe the route by which increased salt intake leads to cardiovascular diseases. We have reviewed the cellular and molecular mechanisms through which a high intake of salt acts on the cardiovascular system to lead to the progressive failure of a healthy heart.
Collapse
Affiliation(s)
- Marcelo Perim Baldo
- Department of Physiological Sciences, Federal University of Espírito Santo, Av Marechal Campos 1468, Maruipe, Vitória, ES, 29042-755, Brazil,
| | | | | |
Collapse
|
34
|
Gao W, Wang ZM, Zhu M, Lian XQ, Zhao H, Zhao D, Yang ZJ, Lu X, Wang LS. Altered long noncoding RNA expression profiles in the myocardium of rats with ischemic heart failure. J Cardiovasc Med (Hagerstown) 2016; 16:473-9. [PMID: 26002832 DOI: 10.2459/jcm.0b013e32836499cd] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
AIMS Despite significant advances in the treatment of coronary artery disease, the prevalence of ischemic heart failure is still increasing rapidly. Long noncoding RNAs are a novel class of gene regulators and may contribute to disease cause. The aim of the present study was to investigate the expression profiles of long noncoding RNAs and their potential functional roles in ischemic heart failure. METHODS We applied a well-established ischemic heart failure rat model and performed long noncoding RNA microarray experiments on the left ventricular tissue of rats with ischemic heart failure and under sham control. Differentially expressed long noncoding RNAs and mRNAs were identified through fold-change filtering. Bioinformatic analyses were performed to predict the potential biological roles of key long noncoding RNAs. RESULTS We found that 1197 long noncoding RNAs and 2066 mRNAs were upregulated, whereas 1403 long noncoding RNAs and 2871 mRNAs were downregulated in failing hearts (fold-change > 2.0). We also identified 331 pairs of differentially expressed long noncoding RNAs and nearby coding genes, which contained 291 long noncoding RNAs and 296 mRNAs. Expression levels of four long noncoding RNA-mRNA pairs, which might be involved in the pathogenesis of ischemic heart failure were confirmed by quantitative real-time PCR. CONCLUSION Our study identified a set of long noncoding RNAs that were aberrantly expressed in rats with ischemic heart failure and might be involved in the pathogenesis of ischemic heart failure. The results of our study may provide a novel perspective for better understanding the molecular basis of ischemic heart failure.
Collapse
Affiliation(s)
- Wei Gao
- aDepartment of Cardiology, the First Affiliated Hospital of Nanjing Medical University bDepartment of Geriatrics, the Second Affiliated Hospital of Nanjing Medical University, Nanjing, China *Wei Gao and Ze-Mu Wang contributed equally to this work
| | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Mesenchymal stem cell therapy associated with endurance exercise training: Effects on the structural and functional remodeling of infarcted rat hearts. J Mol Cell Cardiol 2016; 90:111-9. [DOI: 10.1016/j.yjmcc.2015.12.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 11/20/2015] [Accepted: 12/14/2015] [Indexed: 01/16/2023]
|
36
|
He W, Huang H, Xie Q, Wang Z, Fan Y, Kong B, Huang D, Xiao Y. MiR-155 Knockout in Fibroblasts Improves Cardiac Remodeling by Targeting Tumor Protein p53-Inducible Nuclear Protein 1. J Cardiovasc Pharmacol Ther 2015; 21:423-35. [PMID: 26589288 DOI: 10.1177/1074248415616188] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 09/28/2015] [Indexed: 01/08/2023]
Abstract
Cardiac remodeling caused by acute myocardial infarction (AMI) represents a major challenge for heart failure research. MiR-155 has been identified as a key mediator of cardiac inflammation and hypertrophy. In this study, we investigate the role of miR-155 in cardiac remodeling induced by AMI. We demonstrate that miR-155 expressed in cardiac fibroblasts is a potent contributor to cardiac remodeling. We reveal that in vivo, miR-155 knockout improves left ventricular function, reduces infarct size, and attenuates collagen deposition, whereas overexpression of miR-155 produces the opposite effects. MiR-155 knockout also inhibits cardiac fibroblast proliferation and differentiation into myofibroblasts. In addition, downregulation of tumor protein p53-inducible nuclear protein 1 (TP53INP1) by small interfering RNA reverses the effects of miR-155 knockout on cardiac fibroblasts. Our data reveal that knockout of miR-155 in cardiac fibroblasts improves cardiac remodeling by targeting TP53INP1, which may be a novel treatment strategy for cardiac remodeling.
Collapse
Affiliation(s)
- Wangwei He
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, PR China
| | - He Huang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, PR China
| | - Qiang Xie
- Department of Cardiology, The First Affiliated Hospital of Xiamen University, Xiamen, PR China
| | - Zhiqiang Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, PR China
| | - Yang Fan
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, PR China
| | - Bin Kong
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, PR China
| | - Dan Huang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, PR China
| | - Yali Xiao
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, PR China
| |
Collapse
|
37
|
Hardwick JC, Ryan SE, Powers EN, Southerland EM, Ardell JL. Angiotensin receptors alter myocardial infarction-induced remodeling of the guinea pig cardiac plexus. Am J Physiol Regul Integr Comp Physiol 2015; 309:R179-88. [PMID: 25947168 PMCID: PMC4504959 DOI: 10.1152/ajpregu.00004.2015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 04/29/2015] [Indexed: 01/08/2023]
Abstract
Neurohumoral remodeling is fundamental to the evolution of heart disease. This study examined the effects of chronic treatment with an ACE inhibitor (captopril, 3 mg·kg(-1)·day(-1)), AT1 receptor antagonist (losartan, 3 mg·kg(-1)·day(-1)), or AT2 receptor agonist (CGP42112A, 0.14 mg·kg(-1)·day(-1)) on remodeling of the guinea pig intrinsic cardiac plexus following chronic myocardial infarction (MI). MI was surgically induced and animals recovered for 6 or 7 wk, with or without drug treatment. Intracellular voltage recordings from whole mounts of the cardiac plexus were used to monitor changes in neuronal responses to norepinephrine (NE), muscarinic agonists (bethanechol), or ANG II. MI produced an increase in neuronal excitability with NE and a loss of sensitivity to ANG II. MI animals treated with captopril exhibited increased neuronal excitability with NE application, while MI animals treated with CGP42112A did not. Losartan treatment of MI animals did not alter excitability with NE compared with untreated MIs, but these animals did show an enhanced synaptic efficacy. This effect on synaptic function was likely due to presynaptic AT1 receptors, since ANG II was able to reduce output to nerve fiber stimulation in control animals, and this effect was prevented by inclusion of losartan in the bath solution. Analysis of AT receptor expression by Western blot showed a decrease in both AT1 and AT2 receptors with MI that was reversed by all three drug treatments. These data indicate that neuronal remodeling of the guinea pig cardiac plexus following MI is mediated, in part, by activation of both AT1 and AT2 receptors.
Collapse
MESH Headings
- Action Potentials
- Angiotensin II/pharmacology
- Angiotensin II Type 1 Receptor Blockers/pharmacology
- Angiotensin II Type 2 Receptor Blockers/pharmacology
- Animals
- Disease Models, Animal
- Electric Stimulation
- Evoked Potentials
- Guinea Pigs
- Heart/innervation
- Male
- Myocardial Infarction/metabolism
- Myocardial Infarction/pathology
- Myocardial Infarction/physiopathology
- Norepinephrine/pharmacology
- Presynaptic Terminals/drug effects
- Presynaptic Terminals/metabolism
- Receptor, Angiotensin, Type 1/drug effects
- Receptor, Angiotensin, Type 1/metabolism
- Receptor, Angiotensin, Type 2/drug effects
- Receptor, Angiotensin, Type 2/metabolism
- Receptors, Presynaptic/antagonists & inhibitors
- Receptors, Presynaptic/metabolism
- Signal Transduction
- Time Factors
Collapse
Affiliation(s)
| | | | | | - E Marie Southerland
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee
| | - Jeffrey L Ardell
- University of California at Los Angeles (UCLA) Neurocardiology Research Center of Excellence, Los Angeles, California; and UCLA Cardiac Arrhythmia Center, Los Angeles, California
| |
Collapse
|
38
|
Zhong Z, Hu JQ, Wu XD, Sun Y, Jiang J. Myocardin-related transcription factor-A-overexpressing bone marrow stem cells protect cardiomyocytes and alleviate cardiac damage in a rat model of acute myocardial infarction. Int J Mol Med 2015; 36:753-9. [PMID: 26135208 DOI: 10.3892/ijmm.2015.2261] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 05/15/2015] [Indexed: 11/05/2022] Open
Abstract
Myocardin-related transcription factor-A (MRTF-A) can transduce biomechanical and humoral signals, which can positively modulate cardiac damage induced by acute myocardial infarction (AMI). In the clinic, bone marrow stem cell (BMSC) therapy is being increasingly utilized for AMI; however, the effects of BMSC transplantation remain to be optimized. Therefore, a novel strategy to enhance BMSC‑directed myocardial repair is particularly important. The present study was performed to assess the efficacy of MRTF‑A-overexpressing BMSCs in a rat model of AMI. Primary cardiomyocytes were prepared from neonatal Sprague-Dawley rats and BMSCs were isolated from male Sprague-Dawley rats (aged 8-12 weeks). Annexin V-phycoerythrin/7-actinomycin D staining was used to evaluate BMSC and cardiomyocyte survival after exposure to hydrogen peroxide in vitro. B-cell lymphoma 2 (Bcl-2) protein expression was measured by flow cytometric and western blot analyses. The effects of MRTF-A‑overexpressing BMSCs in a rat model of AMI were investigated by hematoxylin and eosin staining and western blot analysis of Bcl-2 expression in myocardial tissue sections. MRTF-A enhanced the migration of BMSCs, and overexpression of MRTF-A in BMSCs prevented hydrogen peroxide-induced apoptosis in primary cardiomyocytes ex vivo. In addition, co-culture of cardiomyocytes with MRTF‑A-overexpressing BMSCs inhibited hydrogen peroxide-induced apoptosis and the enhanced expression of Bcl-2. Furthermore, in vivo, enhanced cell survival was observed in the MRTF-A-modified BMSC group compared with that in the control group. These observations indicated that MRTF-A-overexpressing BMSCs have the potential to exert cardioprotective effects against hydrogen peroxide-induced injury and that treatment with MRTF‑A‑modified BMSCs is able to reverse cardiac dysfunction after AMI.
Collapse
Affiliation(s)
- Ze Zhong
- The Second Affiliated Hospital (Jiande Branch), Department of Cardiology, Zhejiang University School of Medicine, Jiande, Zhejiang 311600, P.R. China
| | - Jia-Qing Hu
- The Second Affiliated Hospital (Jiande Branch), Department of Cardiology, Zhejiang University School of Medicine, Jiande, Zhejiang 311600, P.R. China
| | - Xin-Dong Wu
- The Second Affiliated Hospital (Jiande Branch), Department of Cardiology, Zhejiang University School of Medicine, Jiande, Zhejiang 311600, P.R. China
| | - Yong Sun
- The Second Affiliated Hospital (Jiande Branch), Department of Cardiology, Zhejiang University School of Medicine, Jiande, Zhejiang 311600, P.R. China
| | - Jun Jiang
- The Second Affiliated Hospital (Jiande Branch), Department of Cardiology, Zhejiang University School of Medicine, Jiande, Zhejiang 311600, P.R. China
| |
Collapse
|
39
|
He B, Ge H, Yang F, Sun Y, Li Z, Jiang M, Fan Y, Pu J, Shen X. A Novel Method in the Stratification of Post-Myocardial-Infarction Patients Based on Pathophysiology. PLoS One 2015; 10:e0130158. [PMID: 26090807 PMCID: PMC4474973 DOI: 10.1371/journal.pone.0130158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 05/18/2015] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVES We proposed that the severity of ST-segment elevation myocardial infarction (STEMI) could be classified based on pathophysiological changes. METHODS First-STEMI patients were classified within hospitalization. Grade 0: no detectable myocardial necrosis; Grade 1: myocardial necrosis without functional and morphological abnormalities; Grade 2: myocardial necrosis with reduced LVEF; Grade 3: reduced LVEF on the basis of cardiac remodeling; Grade 4: mitral regurgitation additional to the Grade-3 criteria. RESULTS Of 180 patients, 1.7, 43.9, 26.1, 23.9 and 4.4% patients were classified as Grade 0 to 4, respectively. The classification is an independent predicator of 90-day MACEs (any death, resuscitated cardiac arrest, acute heart failure and stroke): the rate was 0, 5.1, 8.5, 48.8 and 75% from Grade 0 to 4 (p < 0.001), respectively. The Grade-2 patients were more likely to have recovered left ventricular ejection fraction than the Grade-3/4 patients did after 90 days (48.9% vs. 19.1%, p < 0.001). Avoiding complicated quantification, the classification served as a good reflection of infarction size as measured by cardiac magnetic resonance imaging (0 ± 0, 15.68 ± 8.48, 23.68 ± 9.32, 36.12 ± 11.35 and 40.66 ± 14.33% of the left ventricular mass by Grade 0 to 4, P < 0.001), and with a comparable prognostic value (AUC 0.819 vs. 0.813 for infarction size, p = 0.876 by C-statistics) for MACEs. CONCLUSIONS The new classification represents an easy and objective method to scale the cardiac detriments for STEMI patients.
Collapse
Affiliation(s)
- Ben He
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
- * E-mail: (BH); (HG)
| | - Heng Ge
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
- * E-mail: (BH); (HG)
| | - Fan Yang
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Yujun Sun
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Zheng Li
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Meng Jiang
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Yiting Fan
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Jun Pu
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Xuedong Shen
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| |
Collapse
|
40
|
Hanes DW, Wong ML, Jenny Chang CW, Humphrey S, Grayson JK, Boyd WD, Griffiths LG. Embolization of the first diagonal branch of the left anterior descending coronary artery as a porcine model of chronic trans-mural myocardial infarction. J Transl Med 2015; 13:187. [PMID: 26047812 PMCID: PMC4634919 DOI: 10.1186/s12967-015-0547-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 05/25/2015] [Indexed: 12/24/2022] Open
Abstract
Background Although the incidence of acute death related to coronary artery disease has decreased with the advent of new interventional therapies, myocardial infarction remains one of the leading causes of death in the US. Current animal models developed to replicate this phenomenon have been associated with unacceptably high morbidity and mortality. A new model utilizing the first diagonal branch of the left anterior descending artery (D1-LAD) was developed to provide a clinically relevant lesion, while attempting to minimize the incidence of adverse complications associated with infarct creation. Methods Eight Yucatan miniature pigs underwent percutaneous embolization of the D1-LAD via injection of 90 µm polystyrene micro-spheres. Cardiac structure and function were monitored at baseline, immediately post-operatively, and at 8-weeks post-infarct using transthoracic echocardiography. Post-mortem histopathology and biochemical analyses were performed to evaluate for changes in myocardial structure and extracellular matrix (ECM) composition respectively. Echocardiographic data were evaluated using a repeated measures analysis of variance followed by Tukey’s HSD post hoc test. Biochemical analyses of infarcted to non-infarcted myocardium were compared using analysis of variance. Results All eight pigs successfully underwent echocardiography prior to catheterization. Overall procedural survival rate was 83% (5/6) with one pig excluded due to failure of infarction and another due to deviation from protocol. Ejection fraction significantly decreased from 69.7 ± 7.8% prior to infarction to 50.6 ± 14.7% immediately post-infarction, and progressed to 48.7 ± 8.9% after 8-weeks (p = 0.011). Left ventricular diameter in systole significantly increased from 22.6 ± 3.8 mm pre-operatively to 30.9 ± 5.0 mm at 8 weeks (p = 0.016). Histopathology showed the presence of disorganized fibrosis on hematoxylin and eosin and Picro Sirius red stains. Collagen I and sulfated glycosaminoglycan content were significantly greater in the infarcted region than in normal myocardium (p = 0.007 and p = 0.018, respectively); however, pyridinoline crosslink content per collagen I content in the infarcted region was significantly less than normal myocardium (p = 0.048). Conclusion Systolic dysfunction and changes in ECM composition induced via embolization of the D1-LAD closely mimic those found in individuals with chronic myocardial infarction (MI), and represents a location visible without the need for anesthesia. As a result, this method represents a useful model for studying chronic MI. Electronic supplementary material The online version of this article (doi:10.1186/s12967-015-0547-4) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Derek W Hanes
- Department of Veterinary Medicine and Epidemiology, University of California, Davis, One Shields Ave., Davis, CA, 95616, USA.
| | - Maelene L Wong
- Department of Veterinary Medicine and Epidemiology, University of California, Davis, One Shields Ave., Davis, CA, 95616, USA.
| | - C W Jenny Chang
- Department of Veterinary Medicine and Epidemiology, University of California, Davis, One Shields Ave., Davis, CA, 95616, USA.
| | - Sterling Humphrey
- University of California Davis, Medical Center, 2221 Stockton Blvd, Sacramento, CA, 95817, USA.
| | - J Kevin Grayson
- Clinical Investigation Facility, David Grant USAF Medical Center, 101 Bodin Circle, Travis AFB, CA, 94535, USA.
| | - Walter D Boyd
- University of California Davis, Medical Center, 2221 Stockton Blvd, Sacramento, CA, 95817, USA.
| | - Leigh G Griffiths
- Department of Veterinary Medicine and Epidemiology, University of California, Davis, One Shields Ave., Davis, CA, 95616, USA.
| |
Collapse
|
41
|
Salles TA, dos Santos L, Barauna VG, Girardi ACC. Potential role of dipeptidyl peptidase IV in the pathophysiology of heart failure. Int J Mol Sci 2015; 16:4226-49. [PMID: 25690036 PMCID: PMC4346954 DOI: 10.3390/ijms16024226] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2014] [Revised: 02/05/2015] [Accepted: 02/09/2015] [Indexed: 12/14/2022] Open
Abstract
Dipeptidyl peptidase IV (DPPIV) is a widely expressed multifunctional serine peptidase that exists as a membrane-anchored cell surface protein or in a soluble form in the plasma and other body fluids. Numerous substrates are cleaved at the penultimate amino acid by DPPIV, including glucagon-like peptide-1 (GLP-1), brain natriuretic peptide (BNP) and stromal cell-derived factor-1 (SDF-α), all of which play important roles in the cardiovascular system. In this regard, recent reports have documented that circulating DPPIV activity correlates with poorer cardiovascular outcomes in human and experimental heart failure (HF). Moreover, emerging evidence indicates that DPPIV inhibitors exert cardioprotective and renoprotective actions in a variety of experimental models of cardiac dysfunction. On the other hand, conflicting results have been found when translating these promising findings from preclinical animal models to clinical therapy. In this review, we discuss how DPPIV might be involved in the cardio-renal axis in HF. In addition, the potential role for DPPIV inhibitors in ameliorating heart disease is revised, focusing on the effects of the main DPPIV substrates on cardiac remodeling and renal handling of salt and water.
Collapse
Affiliation(s)
- Thiago A Salles
- Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), University of São Paulo Medical School, São Paulo 05403-000, SP, Brazil.
| | - Leonardo dos Santos
- Department of Physiological Sciences, Federal University of Espírito Santo, Vitoria 29043-900, ES, Brazil.
| | - Valério G Barauna
- Department of Physiological Sciences, Federal University of Espírito Santo, Vitoria 29043-900, ES, Brazil.
| | - Adriana C C Girardi
- Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), University of São Paulo Medical School, São Paulo 05403-000, SP, Brazil.
| |
Collapse
|
42
|
Effects of high and low salt intake on left ventricular remodeling after myocardial infarction in normotensive rats. ACTA ACUST UNITED AC 2015; 9:77-85. [DOI: 10.1016/j.jash.2014.11.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2014] [Revised: 11/26/2014] [Accepted: 11/30/2014] [Indexed: 12/16/2022]
|
43
|
Bajgelman MC, Dos Santos L, Silva GJJ, Nakamuta J, Sirvente RA, Chaves M, Krieger JE, Strauss BE. Preservation of cardiac function in left ventricle cardiac hypertrophy using an AAV vector which provides VEGF-A expression in response to p53. Virology 2014; 476:106-114. [PMID: 25543961 DOI: 10.1016/j.virol.2014.12.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 11/18/2014] [Accepted: 12/04/2014] [Indexed: 01/19/2023]
Abstract
Here we present the application of our adeno-associated virus (AAV2) vector where transgene expression is driven by a synthetic, p53-responsive promoter, termed PG, used to supply human vascular endothelial growth factor-A165 (VEGF-A). Thus, p53 is harnessed to promote the beneficial expression of VEGF-A encoded by the AAVPG vector, bypassing the negative effect of p53 on HIF-1α which occurs during cardiac hypertrophy. Wistar rats were submitted to pressure overload induced by thoracic aorta coarctation (TAC) with or without concomitant gene therapy (intramuscular delivery in the left ventricle). After 12 weeks, rats receiving AAVPG-VEGF gene therapy were compared to those that did not, revealing significantly improved cardiac function under hemodynamic stress, lack of fibrosis and reversal of capillary rarefaction. With these functional assays, we have demonstrated that application of the AAVPG-VEGF vector under physiologic conditions known to stimulate p53 resulted in the preservation of cardiac performance.
Collapse
Affiliation(s)
- Marcio C Bajgelman
- Viral Vector Laboratory, Heart Institute, University of São Paulo School of Medicine, São Paulo, Brazil; Laboratory of Genetics and Molecular Cardiology/LIM13, Heart Institute, University of São Paulo School of Medicine, São Paulo, Brazil
| | - Leonardo Dos Santos
- Laboratory of Genetics and Molecular Cardiology/LIM13, Heart Institute, University of São Paulo School of Medicine, São Paulo, Brazil
| | - Gustavo J J Silva
- Laboratory of Genetics and Molecular Cardiology/LIM13, Heart Institute, University of São Paulo School of Medicine, São Paulo, Brazil
| | - Juliana Nakamuta
- Laboratory of Genetics and Molecular Cardiology/LIM13, Heart Institute, University of São Paulo School of Medicine, São Paulo, Brazil
| | - Raquel A Sirvente
- Hypertension Unit, Heart Institute, University of São Paulo School of Medicine, São Paulo, Brazil
| | - Marcio Chaves
- Laboratory of Genetics and Molecular Cardiology/LIM13, Heart Institute, University of São Paulo School of Medicine, São Paulo, Brazil
| | - José Eduardo Krieger
- Laboratory of Genetics and Molecular Cardiology/LIM13, Heart Institute, University of São Paulo School of Medicine, São Paulo, Brazil
| | - Bryan E Strauss
- Viral Vector Laboratory, Heart Institute, University of São Paulo School of Medicine, São Paulo, Brazil; Laboratory of Genetics and Molecular Cardiology/LIM13, Heart Institute, University of São Paulo School of Medicine, São Paulo, Brazil.
| |
Collapse
|
44
|
Hypoxia training attenuates left ventricular remodeling in rabbit with myocardial infarction. JOURNAL OF GERIATRIC CARDIOLOGY : JGC 2014; 11:237-44. [PMID: 25278973 PMCID: PMC4178516 DOI: 10.11909/j.issn.1671-5411.2014.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 05/12/2014] [Accepted: 06/10/2014] [Indexed: 11/21/2022]
Abstract
Objective Previous studies showed that hypoxia preconditioning could protect cardiac function against subsequent myocardial infarction injury. However, the effect of hypoxia on left ventricular after myocardial infarction is still unclear. This study therefore aims to investigate the effects of hypoxia training on left ventricular remodeling in rabbits post myocardial infarction. Methods Adult male rabbits were randomly divided into three groups: group SO (sham operated), group MI (myocardial infarction only) and group MI-HT (myocardial infarction plus hypoxia training). Myocardial infarction was induced by left ventricular branch ligation. Hypoxia training was performed in a hypobaric chamber (having equivalent condition at an altitude of 4000 m, FiO214.9%) for 1 h/day, 5 days/week for four weeks. At the endpoints, vascular endothelial growth factor (VEGF) in the plasma was measured. Infarct size and capillary density were detected by histology. Left ventricular remodeling and function were assessed by echocardiography. Results After the 4-week experiment, compared with the group SO, plasma VEGF levels in groups MI (130.27 ± 18.58 pg/mL, P < 0.01) and MI-HT (181.93 ± 20.29 pg/mL, P < 0.01) were significantly increased. Infarct size in Group MI-HT (29.67% ± 7.73%) was deceased remarkably, while its capillary density (816.0 ± 122.2/mm2) was significantly increased. For both groups MI and MI-HT, left ventricular end-diastolic and end-systolic dimensions were increased whereas left ventricular ejection fraction was decreased. However, compared with group MI, group MI-HT diminished left ventricular end-diastolic (15.86 ± 1.09 mm, P < 0.05) and end-systolic dimensions (12.10 ± 1.20 mm, P < 0.01) significantly and improved left ventricular ejection fraction (54.39 ± 12.74 mm, P < 0.05). Conclusion Hypoxia training may improve left ventricular function and reduce remodeling via angiogenesis in rabbits with MI.
Collapse
|
45
|
Activation of IK1 Channel by Zacopride Attenuates Left Ventricular Remodeling in Rats With Myocardial Infarction. J Cardiovasc Pharmacol 2014; 64:345-56. [DOI: 10.1097/fjc.0000000000000127] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
46
|
Faria TDO, Costa GP, Almenara CCP, Angeli JK, Vassallo DV, Stefanon I, Vassallo PF. Chronic exposure to low doses of HgCl2 avoids calcium handling impairment in the right ventricle after myocardial infarction in rats. PLoS One 2014; 9:e95639. [PMID: 24748367 PMCID: PMC3991698 DOI: 10.1371/journal.pone.0095639] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Accepted: 03/27/2014] [Indexed: 11/26/2022] Open
Abstract
Right ventricle systolic dysfunction is a major risk factor for death and heart failure after myocardial infarction (MI). Heavy metal exposure has been associated with the development of several cardiovascular diseases, such as MI. The aim of this study was to investigate whether chronic exposure to low doses of mercury chloride (HgCl2) enhances the functional deterioration of right ventricle strips after MI. Male Wistar rats were divided into four groups: Control (vehicle); HgCl2 (exposure during 4 weeks- 1st dose 4.6 µg/kg, subsequent dose 0.07 µg/kg/day, i.m. to cover daily loss); MI surgery induced and HgCl2-MI groups. One week after MI, the morphological and hemodynamic measurements and isometric tension of right ventricle strips were investigated. The chronic HgCl2 exposure did not worsen the injury compared with MI alone in the morphological or hemodynamic parameters evaluated. At basal conditions, despite similar maximum isometric force at L-max, relaxation time was increased in the MI group but unaffected in the HgCl2-MI compared to the Control group. Impairment of the sarcoplasmic reticulum (SR) function and reduction in the sarcolemmal calcium influx were observed in MI group associated with SERCA2a reduction and increased PLB protein expression. Induction of MI in chronic HgCl2 exposed rats did not cause any alteration in the developed force at L-max, lusitropic function or -dF/dt except for a tendency of a reduction SR function. These findings could be partially explained by the normalization in the sarcolemmal calcium influx and the increase in NCX protein expression observed only in this group. These results suggest that chronic exposure to low doses of HgCl2 prevents the impaired SR function and the reduced sarcolemmal calcium influx observed in MI likely by acting on NCX, PLB and SERCA2a protein expression.
Collapse
Affiliation(s)
- Thaís de Oliveira Faria
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, Brazil
| | - Gustavo Pinto Costa
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, Brazil
| | | | - Jhuli Keli Angeli
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, Brazil
| | - Dalton Valentim Vassallo
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, Brazil
- Escola de Ensino Superior da Santa Casa de Misericórdia de Vitória, EMESCAM, Vitória, Brazil
| | - Ivanita Stefanon
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, Brazil
| | - Paula Frizera Vassallo
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, Brazil
| |
Collapse
|
47
|
Zhao SL, Zhang YJ, Li MH, Zhang XL, Chen SL. Mesenchymal stem cells with overexpression of midkine enhance cell survival and attenuate cardiac dysfunction in a rat model of myocardial infarction. Stem Cell Res Ther 2014; 5:37. [PMID: 24635859 PMCID: PMC4055147 DOI: 10.1186/scrt425] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 03/11/2014] [Indexed: 12/24/2022] Open
Abstract
INTRODUCTION Elevated midkine (MK) expression may contribute to ventricular remodeling and ameliorate cardiac dysfunction after myocardial infarction (MI). Ex vivo modification of signaling mechanisms in mesenchymal stem cells (MSCs) with MK overexpression may improve the efficacy of cell-based therapy. This study sought to assess the safety and efficacy of MSCs with MK overexpression transplantation in a rat model of MI. METHODS A pLenO-DCE vector lentivirus encoding MK was constructed and infected in MSCs. MSC migration activity and cytoprotection was examined in hypoxia-induced H9C2 cells using transwell insert in vitro. Rats were randomized into five groups: sham, MI plus injection of phosphate buffered saline (PBS), MSCs, MSCs-green fluorescent protein (MSCs-GFP) and MSCs-MK, respectively. Survival rates were compared among groups using log-rank test and left ventricular function was measured by echocardiography at baseline, 4, 8 and 12 weeks. RESULTS Overexpression of MK partially prevented hypoxia-induced MSC apoptosis and exerted MSC cytoprotection to anoxia induced H9C2 cells. The underlying mechanisms may be associated with the increased mRNA and protein levels of vascular endothelial growth factor (VEGF), transformation growth factor-β (TGF-β), insulin-like growth factor 1 (IGF-1) and stromal cell-derived factor 1 (SDF-1a) in MSCs-MK compared with isolated MSCs and MSCs-GFP. Consistent with the qPCR results, the culture supernatant of MSCs-MK had more SDF-1a (9.23 ng/ml), VEGF (8.34 ng/ml) and TGF-β1 (17.88 ng/ml) expression. In vivo, a greater proportion of cell survival was observed in the MSCs-MK group than in the MSCs-GFP group. Moreover, MSCs-MK administration was related to a significant improvement of cardiac function compared with other control groups at 12 weeks. CONCLUSIONS Therapies employing MSCs with MK overexpression may represent an effective treatment for improving cardiac dysfunction and survival rate after MI.
Collapse
|
48
|
Savcheniuk OA, Virchenko OV, Falalyeyeva TM, Beregova TV, Babenko LP, Lazarenko LM, Demchenko OM, Bubnov RV, Spivak MY. The efficacy of probiotics for monosodium glutamate-induced obesity: dietology concerns and opportunities for prevention. EPMA J 2014; 5:2. [PMID: 24410812 PMCID: PMC3922789 DOI: 10.1186/1878-5085-5-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Accepted: 12/26/2013] [Indexed: 12/21/2022]
Abstract
Introduction Obesity becomes endemic today. Monosodium glutamate was proved as obesogenic food additive. Probiotics are discussed to impact on obesity development. Aims and objectives The aim was to study the effects of probiotics on the development of monosodium glutamate (MSG)-induced obesity in rats. Material and methods We included 45 Wistar male rats and divided into three groups (n = 15). Newborn rats of group 1 (control) received subcutaneously 8 μl/g saline. Group 2 received 3 to 4 mg/g MSG subcutaneously on the second, fourth, sixth, eighth and tenth day of life. Within 4 months after birth, rats were on a standard diet. Group 3 received an aqueous solution of probiotics mixture (2:1:1 Lactobacillus casei IMVB-7280, Bifidobacterium animalis VKL, B. animalis VKB) at the dose of 5 × 109 CFU/kg (50 mg/kg) intragastrically. Administration of probiotics was started at the age of 4 weeks just after weaning and continued for 3 months during 2-week courses. Group 2 received intragastrically 2.5 ml/kg water. Organometric and biochemical parameters in all groups of rats were analyzed over 4 months. The concentration of adiponectin was determined in serum, and leptin - in adipose tissue. Results Administration of MSG led to the development of obesity in rats; body weight had increased by 7.9% vs controls (p < 0.05); body length had increased by 5.4% (p < 0.05). Body mass index and Lee index and visceral fat mass had increased (p < 0.001). Under the neonatal injection of MSG, the concentration of total cholesterol, triglycerides, VLDL cholesterol and LDL cholesterol significantly increased (p < 0.001), in comparison with controls. Adipose-derived hormones changed in MSG obesity rats: adiponectin decreased by 58.8% (p < 0.01), and leptin concentration in adipose tissue had increased by 74.7% (p < 0.01). The probiotic therapy of rats from group 3 prevented obesity development. Parameters of rats treated with probiotic mixture did not differ from that in the control. Conclusions The introduction of MSG to newborn rats caused the obesity in adulthood. Periodic administration of probiotic mixture to rat injected with MSG neonatally resulted in recovery of lipid metabolism and prevention of the obesity development.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | - Rostyslav V Bubnov
- Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, Zabolotny Str,, 154, Kyiv 03680, Ukraine.
| | | |
Collapse
|
49
|
Mesenchymal stem cell therapy for cardiac inflammation: immunomodulatory properties and the influence of toll-like receptors. Mediators Inflamm 2013; 2013:181020. [PMID: 24391353 PMCID: PMC3872440 DOI: 10.1155/2013/181020] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Accepted: 11/14/2013] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND After myocardial infarction (MI), the inflammatory response is indispensable for initiating reparatory processes. However, the intensity and duration of the inflammation cause additional damage to the already injured myocardium. Treatment with mesenchymal stem cells (MSC) upon MI positively affects cardiac function. This happens likely via a paracrine mechanism. As MSC are potent modulators of the immune system, this could influence this postinfarct immune response. Since MSC express toll-like receptors (TLR), danger signal (DAMP) produced after MI could influence their immunomodulatory properties. SCOPE OF REVIEW Not much is known about the direct immunomodulatory efficiency of MSC when injected in a strong inflammatory environment. This review focuses first on the interactions between MSC and the immune system. Subsequently, an overview is provided of the effects of DAMP-associated TLR activation on MSC and their immunomodulative properties after myocardial infarction. MAJOR CONCLUSIONS MSC can strongly influence most cell types of the immune system. TLR signaling can increase and decrease this immunomodulatory potential, depending on the available ligands. Although reports are inconsistent, TLR3 activation may boost immunomodulation by MSC, while TLR4 activation suppresses it. GENERAL SIGNIFICANCE Elucidating the effects of TLR activation on MSC could identify new preconditioning strategies which might improve their immunomodulative properties.
Collapse
|
50
|
Wan WG, Jiang XJ, Li XY, Zhang C, Yi X, Ren S, Zhang XZ. Enhanced cardioprotective effects mediated by plasmid containing the short-hairpin RNA of angiotensin converting enzyme with a biodegradable hydrogel after myocardial infarction. J Biomed Mater Res A 2013; 102:3452-8. [PMID: 24222385 DOI: 10.1002/jbm.a.35014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 10/07/2013] [Accepted: 10/23/2013] [Indexed: 01/08/2023]
Affiliation(s)
- Wei-Guo Wan
- Department of Cardiology; Renmin Hospital of Wuhan University; Wuhan 430060 People's Republic of China
- Cardiovascular Research Institute; Wuhan University; Wuhan 430060 People's Republic of China
| | - Xue-Jun Jiang
- Department of Cardiology; Renmin Hospital of Wuhan University; Wuhan 430060 People's Republic of China
- Cardiovascular Research Institute; Wuhan University; Wuhan 430060 People's Republic of China
| | - Xiao-Yan Li
- Department of Cardiology; Renmin Hospital of Wuhan University; Wuhan 430060 People's Republic of China
- Cardiovascular Research Institute; Wuhan University; Wuhan 430060 People's Republic of China
| | - Cui Zhang
- Department of Cardiology; Renmin Hospital of Wuhan University; Wuhan 430060 People's Republic of China
- Cardiovascular Research Institute; Wuhan University; Wuhan 430060 People's Republic of China
| | - Xin Yi
- Department of Cardiology; Renmin Hospital of Wuhan University; Wuhan 430060 People's Republic of China
- Cardiovascular Research Institute; Wuhan University; Wuhan 430060 People's Republic of China
| | - Shan Ren
- Department of Cardiology; Renmin Hospital of Wuhan University; Wuhan 430060 People's Republic of China
- Cardiovascular Research Institute; Wuhan University; Wuhan 430060 People's Republic of China
| | - Xian-Zheng Zhang
- Key Laboratory of Biomedical Polymers of Ministry of Education; Department of Chemistry; Wuhan University; Wuhan 430072 People's Republic of China
| |
Collapse
|