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Dini FL, Carluccio E, Ghio S, Pugliese NR, Galeotti G, Correale M, Beltrami M, Tocchetti CG, Mercurio V, Paolillo S, Palazzuoli A. Patient phenotype profiling using echocardiography and natriuretic peptides to personalise heart failure therapy. Heart Fail Rev 2024; 29:367-378. [PMID: 37728750 DOI: 10.1007/s10741-023-10340-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/07/2023] [Indexed: 09/21/2023]
Abstract
Heart failure (HF) is a progressive condition with a clinical picture resulting from reduced cardiac output (CO) and/or elevated left ventricular (LV) filling pressures (LVFP). The original Diamond-Forrester classification, based on haemodynamic data reflecting CO and pulmonary congestion, was introduced to grade severity, manage, and risk stratify advanced HF patients, providing evidence that survival progressively worsened for those classified as warm/dry, cold/dry, warm/wet, and cold/wet. Invasive haemodynamic evaluation in critically ill patients has been replaced by non-invasive haemodynamic phenotype profiling using echocardiography. Decreased CO is not infrequent among ambulatory HF patients with reduced ejection fraction, ranging from 23 to 45%. The Diamond-Forrester classification may be used in combination with the evaluation of natriuretic peptides (NPs) in ambulatory HF patients to pursue the goal of early identification of those at high risk of adverse events and personalise therapy to antagonise neurohormonal systems, reduce congestion, and preserve tissue/renal perfusion. The most benefit of the Guideline-directed medical treatment is to be expected in stable patients with the warm/dry profile, who more often respond with LV reverse remodelling, while more selective individualised treatments guided by echocardiography and NPs are necessary for patients with persisting congestion and/or tissue/renal hypoperfusion (cold/dry, warm/wet, and cold/wet phenotypes) to achieve stabilization and to avoid further neurohormonal activation, as a result of inappropriate use of vasodilating or negative chronotropic drugs, thus pursuing the therapeutic objectives. Therefore, tracking the haemodynamic status over time by clinical, imaging, and laboratory indicators helps implement therapy by individualising drug regimens and interventions according to patients' phenotypes even in an ambulatory setting.
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Affiliation(s)
- Frank L Dini
- Istituto Auxologico IRCCS, Centro Medico Sant'Agostino, Via Temperanza, 6, 20127, Milan, Italy.
- Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden.
| | - Erberto Carluccio
- Cardiology and Cardiovascular Pathophysiology, Santa Maria della Misericordia, University of Perugia, Perugia, Italy
| | - Stefano Ghio
- Cardiology Division, Fondazione IRCCS, Policlinico San Matteo, Pavia, Italy
| | | | | | - Michele Correale
- Department of Cardiology, University Hospital Policlinico, Riuniti, Foggia, Italy
| | - Matteo Beltrami
- Cardiology Unit, San Giovanni di Dio Hospital, Azienda USL Toscana Centro, Florence, Italy
| | - Carlo Gabriele Tocchetti
- Department of Translational Medical Sciences (DISMET), Center for Basic and Clinical Immunology Research (CISI), Interdepartmental Center of Clinical and Translational Sciences (CIRCET), Interdepartmental Hypertension Research Center (CIRIAPA), Federico II University, Naples, Italy
| | - Valentina Mercurio
- Department of Translational Medical Sciences (DISMET), Interdepartmental Center of Clinical and Translational Sciences (CIRCET), Interdepartmental Hypertension Research Center (CIRIAPA), Federico II University, Naples, Italy
| | - Stefania Paolillo
- Department of Advanced Biomedical Sciences, Section of Cardiology, Federico II University, Naples, Italy
| | - Alberto Palazzuoli
- Cardiovascular Diseases Unit, Cardio-thoracic and vascular Department, S. Maria alle Scotte Hospital, University of Siena, Siena, Italy
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Zhang M, Chen X, Yang F, Song Y, Zhang D, Chen Q, Ma Y, Wang S, Ji D, Duan Z, Zhang L, Wang Q. Evaluation of Left Ventricular Mass in Different Cardiac Geometry Using Three-Dimensional Contrast-Enhanced Echocardiography. Int Heart J 2023; 64:885-893. [PMID: 37778991 DOI: 10.1536/ihj.22-663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
A total of 69 patients were enrolled in the study, including 23 patients with hypertrophic cardiomyopathy (HCM), 26 patients with Left Ventricle (LV) enlargement comprising 16 dilated cardiomyopathy (DCM) patients and 10 ischemic cardiomyopathy (ICM) patients, and 20 control subjects. All patients underwent 2DE, contrast-enhanced 2DE (Contrast-2DE), 3DE, Contrast-3DE, and single photon emission computed tomography (SPECT) examinations. The 2DE-AL and 3DE methods measured the left ventricular mass (LVM). The results were compared with those measured by SPECT. The measured LVM of the 69 patients was systematically overestimated by 2DE-AL (177.4 ± 56.2 g), Contrast-2DE-AL (174.5 ± 55.5 g), 3DE (167.3 ± 59.2 g), and Contrast-3DE (154.2 ± 46.7 g) when compared with SPECT (148.5 ± 52.4 g) (P < 0.05), while Contrast-3DE provided the best agreement with SPECT in LVM measurement (r = 0.898, P < 0.001) and had the smallest deviation (5.7 ± 23.1 g). 3DE overestimated LVM more compared to Contrast-3DE in LV hypertrophy group (165.5 ± 37.9 g versus 153.5 ± 27.6 g, P = 0.003) and LV enlargement group (204.5 ± 69.3 g versus 183.5 ± 53.5 g, P = 0.006). For 2DE methods, there was no significant difference between the LVM obtained with or without contrast enhancement in control group (132.3 ± 23.6 g versus 128.4 ± 23.3 g), LV hypertrophy group (177.7 ± 38.6 versus 178.3 ± 30.9 g, P = 0.889), and LV enlargement group (211.9 ± 63.2 g versus 206.5 ± 66.0 g, P = 0.386). The difference between LVM measured by 2DE-AL and SPECT was the greatest (27.9 ± 34.0 g), especially in LV hypertrophy group and LV enlargement group (LV hypertrophy group 39.7 ± 26.0 g; LV enlargement group 24.2 ± 42.8 g). To conclude, Contrast-3DE and SPECT show greater consistency in LVM measurement, especially in cardiomyopathy, when compared with 2DE. Administering contrast can effectively reduce the overestimation of LVM by non-contrast DE.
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Affiliation(s)
- Meiqing Zhang
- Department of Cardiology, Fourth Medical Center of Chinese PLA General Hospital
| | - Xu Chen
- Medical School of Chinese PLA
| | - Feifei Yang
- Department of Cardiology, Sixth Medical Center of Chinese PLA General Hospital
| | - Yanjie Song
- Department of Cardiology, Fourth Medical Center of Chinese PLA General Hospital
| | - Dai Zhang
- Department of Cardiology, Fourth Medical Center of Chinese PLA General Hospital
| | - Qiang Chen
- Department of Cardiology, Fourth Medical Center of Chinese PLA General Hospital
| | - Yongjiang Ma
- Department of Cardiology, Fourth Medical Center of Chinese PLA General Hospital
| | - Shuhua Wang
- Department of Cardiology, Fourth Medical Center of Chinese PLA General Hospital
| | - Dongdong Ji
- Department of Cardiology, Fourth Medical Center of Chinese PLA General Hospital
| | - Zhongxiang Duan
- Department of Nuclear Medicine, Fourth Medical Center of Chinese PLA General Hospital
| | - Liwei Zhang
- Department of Cardiology, Sixth Medical Center of Chinese PLA General Hospital
| | - Qiushuang Wang
- Department of Cardiology, Fourth Medical Center of Chinese PLA General Hospital
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Arterial Hypertension and Cardiopulmonary Function: The Value of a Combined Cardiopulmonary and Echocardiography Stress Test. High Blood Press Cardiovasc Prev 2022; 29:145-154. [PMID: 35107808 PMCID: PMC8942964 DOI: 10.1007/s40292-021-00494-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 11/23/2021] [Indexed: 11/27/2022] Open
Abstract
Arterial hypertension (AH) is a global burden and the leading risk factor for mortality worldwide. Haemodynamic abnormalities, longstanding neurohormonal and inflammatory activation, which are commonly observed in patients with AH, promote cardiac structural remodeling ultimately leading to heart failure (HF) if blood pressure values remain uncontrolled. While several epidemiological studies have confirmed the strong link between AH and HF, the pathophysiological processes underlying this transition remain largely unclear. The combined cardiopulmonary-echocardiography stress test (CPET-ESE) represents a precious non-invasive aid to detect alterations in patients at the earliest stages of HF. The opportunity to study the response of the cardiovascular system to exercise, and to differentiate central from peripheral cardiovascular maladaptations, makes the CPET-ESE an ideal technique to gain insights into the mechanisms involved in the transition from AH to HF, by recognizing alterations that might be silent at rest but influence the response to exercise. Identifications of these subclinical alterations might allow for a better risk stratification in hypertensive patients, facilitating the recognition of those at higher risk of evolution towards established HF. This may also lead to the development of novel preventive strategies and help tailor medical treatment. The purpose of this review is to summarise the potential advantages of using CPET-ESE in the characterisation of hypertensive patients in the cardiovascular continuum.
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Qin Z, Liu D, You X, Duan Q, Zhao Y. Evaluating Impact of Pulse Pressure on Indexes of Myocardial Work by Speckle-Tracking Echocardiography in Normotensive, Prehypertensive and Newly Diagnosed Hypertensive Patients. Int J Gen Med 2022; 15:1933-1943. [PMID: 35228817 PMCID: PMC8882027 DOI: 10.2147/ijgm.s351628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 01/28/2022] [Indexed: 11/28/2022] Open
Abstract
Background The impact of pulse pressure (PP) on indexes of myocardial work (MWIs). This study aims to explore the potential association of high PP with myocardial work (MW). Hypothesis PP had an association with four indexes of MW in a mixed population of normotensive, prehypertensive and newly diagnosed hypertensive individuals. Methods The study was a single-center, cross-sectional, observational study. A total of 204 participants (66 normotensive, 35 prehypertensive and 103 newly diagnosed hypertensive individuals) were evaluated by speckle-tracking echocardiography (STE) and blood pressure measurement. According to the PP tertiles, the participants were divided into three groups: Group I (<44 mmHg, n=67), Group II (44–52 mmHg, n=68) and Group III (≥52 mmHg, n=69). Results In Group II and Group III, the proportion of males was higher than that in Group I (median 46 vs 30 (P=0.002)). With increasing PP, the three indexes of MW, namely, GWI, GCW and GWW, increased, and the differences among the three groups were statistically significant (P<0.001). PP was positively related to GWI, GCW and GWW and negatively correlated with GWE. After adjusting for E/e’, LVMI, LAVI and GLS, PP was still significantly correlated with the four MW indexes (both P<0.001). Conclusion PP had a strong association with four indexes of MW in a mixed population of normotensive, prehypertensive and newly diagnosed hypertensive individuals. The evaluation of PP and MWIs might be valuable for identifying very early diastolic impairment of the heart.
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Affiliation(s)
- Zheng Qin
- Department of Vascular Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People’s Republic of China
| | - Dawei Liu
- Department of Cardiovascular Medicine, The Bishan Hospital of Chongqing Medical University, Chongqing, 402760, People’s Republic of China
| | - Xiaojun You
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People’s Republic of China
| | - Qin Duan
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People’s Republic of China
- Correspondence: Qin Duan, Department of Cardiovascular Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People’s Republic of China, Email
| | - Yu Zhao
- Department of Vascular Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People’s Republic of China
- Yu Zhao, Department of Vascular Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People’s Republic of China, Email
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5
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Coller JM, Gong FF, McGrady M, Shiel L, Liew D, Stewart S, Owen AJ, Krum H, Reid CM, Prior DL, Campbell DJ. Risk factors for asymptomatic echocardiographic abnormalities that predict symptomatic heart failure. ESC Heart Fail 2021; 9:196-212. [PMID: 34850597 PMCID: PMC8788044 DOI: 10.1002/ehf2.13695] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 10/04/2021] [Accepted: 10/29/2021] [Indexed: 01/28/2023] Open
Abstract
Aims Risk factors for asymptomatic echocardiographic abnormalities that predict symptomatic heart failure (HF) may provide insight into early mechanisms of HF pathogenesis. We examined risk factors associated with asymptomatic echocardiographic structural, systolic, and diastolic abnormalities, separately and in combination, and interactions between risk factors, in the prospective community‐based SCReening Evaluation of the Evolution of New HF (SCREEN‐HF) Study cohort of 3190 participants at increased risk of cardiovascular disease. Methods and results Inclusion criteria were age ≥ 60 years with one or more of hypertension, diabetes, ischaemic heart disease, valvular heart disease, abnormal heart rhythm, cerebrovascular disease, or renal impairment. Exclusion criteria were known HF, ejection fraction < 50%, or >mild valve abnormality. Structural, systolic, and diastolic echocardiographic abnormalities were defined according to the Atherosclerosis Risk in Communities study criteria, and risk factors for asymptomatic structural, systolic, and diastolic abnormalities were identified using logistic regression analysis. In multivariable analysis, increased body mass index (BMI), non‐steroidal anti‐inflammatory drug therapy, and alcohol intake were risk factors for isolated structural abnormality, whereas male gender, increased heart rate, atrial fibrillation (AF), angiotensin‐converting enzyme inhibitor therapy, and obstructive sleep apnoea were associated with a lower risk. Moreover, male gender, smoking, increased systolic blood pressure, and physical inactivity were risk factors for isolated systolic abnormality, whereas increased pulse pressure and antihypertensive therapy were associated with a lower risk. Furthermore, increased age, blood pressure, amino‐terminal pro‐B‐type natriuretic peptide level, and warfarin therapy (associated with AF) were risk factors for isolated diastolic abnormality, whereas increased heart rate and triglyceride level (associated with BMI) were associated with a lower risk. The association of increased heart rate with lower risk of structural and diastolic abnormalities was independent of β‐blocker therapy. Interactions between risk factors differed for structural, systolic, and diastolic abnormalities. Conclusions The different risk factors for asymptomatic structural, systolic, and diastolic abnormalities that predict symptomatic HF, and the interactions between risk factors, illustrate how these structural, systolic, and diastolic abnormalities represent unique trajectories that lead to symptomatic HF. Improved understanding of these trajectories may assist in the design of HF prevention strategies.
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Affiliation(s)
| | - Fei Fei Gong
- St. Vincent's Hospital, Melbourne, Victoria, Australia.,University of Melbourne, Parkville, Victoria, Australia.,St. Vincent's Institute of Medical Research, 41 Victoria Parade, Fitzroy, Victoria, 3065, Australia
| | - Michele McGrady
- Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Louise Shiel
- Public Health and Preventive Medicine, Monash University, Prahran, Victoria, Australia
| | - Danny Liew
- Public Health and Preventive Medicine, Monash University, Prahran, Victoria, Australia
| | - Simon Stewart
- Torrens University Australia, Adelaide, South Australia, Australia
| | - Alice J Owen
- Public Health and Preventive Medicine, Monash University, Prahran, Victoria, Australia
| | - Henry Krum
- Public Health and Preventive Medicine, Monash University, Prahran, Victoria, Australia
| | - Christopher M Reid
- Public Health and Preventive Medicine, Monash University, Prahran, Victoria, Australia.,School of Public Health, Curtin University, Bentley, Western Australia, Australia
| | - David L Prior
- St. Vincent's Hospital, Melbourne, Victoria, Australia.,University of Melbourne, Parkville, Victoria, Australia
| | - Duncan J Campbell
- St. Vincent's Hospital, Melbourne, Victoria, Australia.,University of Melbourne, Parkville, Victoria, Australia.,St. Vincent's Institute of Medical Research, 41 Victoria Parade, Fitzroy, Victoria, 3065, Australia
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Impact of diabetes on cardiopulmonary function: the added value of a combined cardiopulmonary and echocardiography stress test. Heart Fail Rev 2021; 28:645-655. [PMID: 34820732 DOI: 10.1007/s10741-021-10194-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/11/2021] [Indexed: 12/25/2022]
Abstract
Type 2 diabetes mellitus (T2DM) represents a major health issue worldwide, as patients with T2DM show an excess risk of death for cardiovascular causes, twice as high as the general population. Among the many complications of T2DM, heart failure (HF) deserves special consideration as one of the leading causes of morbidity and reduced life expectancy. T2DM has been associated with different phenotypes of HF, including HF with reduced and preserved ejection fraction. Cardiopulmonary exercise testing (CPET) can evaluate the metabolic and ventilatory alterations related to myocardial dysfunction and/or peripheral impairment, representing a unique tool for the clinician to study the whole HF spectrum. While CPET allows for a thorough evaluation of functional capacity, it cannot directly differentiate central and peripheral determinants of effort intolerance. Combining CPET with imaging techniques could provide even higher accuracy and further insights into the progression of the disease since signs of left ventricular systolic and diastolic dysfunction can be detected during exercise, even in asymptomatic diabetic individuals. This review aims to dissect the alterations in cardiopulmonary function characterising patients with T2DM and HF to improve patient risk stratification.
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Mandry D, Girerd N, Lamiral Z, Huttin O, Filippetti L, Micard E, Ncho Mottoh MPB, Böhme P, Chemla D, Zannad F, Rossignol P, Marie PY. Arterial and Cardiac Remodeling Associated With Extra Weight Gain in an Isolated Abdominal Obesity Cohort. Front Cardiovasc Med 2021; 8:771022. [PMID: 34805324 PMCID: PMC8602697 DOI: 10.3389/fcvm.2021.771022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 10/18/2021] [Indexed: 12/16/2022] Open
Abstract
Introduction: This study aims to assess the changes in cardiovascular remodeling attributable to bodyweight gain in a middle-aged abdominal obesity cohort. A remodeling worsening might explain the increase in cardiovascular risk associated with a dynamic of weight gain. Methods: Seventy-five middle-aged subjects (56 ± 5 years, 38 women) with abdominal obesity and no known cardiovascular disease underwent MRI-based examinations at baseline and at a 6.1 ± 1.2-year follow-up to monitor cardiovascular remodeling and hemodynamic variables, most notably the effective arterial elastance (Ea). Ea is a proxy of the arterial load that must be overcome during left ventricular (LV) ejection, with increased EA resulting in concentric LV remodeling. Results: Sixteen obese subjects had significant weight gain (>7%) during follow-up (WG+), whereas the 59 other individuals did not (WG-). WG+ and WG- exhibited significant differences in the baseline to follow-up evolutions of several hemodynamic parameters, notably diastolic and mean blood pressures (for mean blood pressure, WG+: +9.3 ± 10.9 mmHg vs. WG-: +1.7 ± 11.8 mmHg, p = 0.022), heart rate (WG+: +0.6 ± 9.4 min-1 vs. -8.9 ± 11.5 min-1, p = 0.003), LV concentric remodeling index (WG: +0.08 ± 0.16 g.mL-1 vs. WG-: -0.02 ± 0.13 g.mL-1, p = 0.018) and Ea (WG+: +0.20 ± 0.28 mL mmHg-1 vs. WG-: +0.01 ± 0.30 mL mmHg-1, p = 0.021). The evolution of the LV concentric remodeling index and Ea were also strongly correlated in the overall obese population (p < 0.001, R2 = 0.31). Conclusions: A weight gain dynamic is accompanied by increases in arterial load and load-related concentric LV remodeling in an isolated abdominal obesity cohort. This remodeling could have a significant impact on cardiovascular risk.
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Affiliation(s)
- Damien Mandry
- Department of Radiology, CHRU-Nancy, Université de Lorraine, Nancy, France.,INSERM, UMR-1254, Université de Lorraine, Nancy, France
| | - Nicolas Girerd
- INSERM, UMR-1116, Université de Lorraine, Nancy, France.,Department of Cardiology, CHRU-Nancy, Université de Lorraine, Nancy, France.,CHRU-Nancy, INSERM, CIC 1433, Université de Lorraine, Nancy, France
| | - Zohra Lamiral
- CHRU-Nancy, INSERM, CIC 1433, Université de Lorraine, Nancy, France
| | - Olivier Huttin
- INSERM, UMR-1116, Université de Lorraine, Nancy, France.,Department of Cardiology, CHRU-Nancy, Université de Lorraine, Nancy, France
| | - Laura Filippetti
- Department of Cardiology, CHRU-Nancy, Université de Lorraine, Nancy, France
| | - Emilien Micard
- CHRU-Nancy, INSERM, CIC 1433, Université de Lorraine, Nancy, France
| | | | - Philip Böhme
- Department of Endocrinology, Diabetology, Nutrition, CHRU-Nancy, Nancy, France
| | - Denis Chemla
- Explorations Fonctionnelles, Hôpital Kremlin Bicêtre, APHP, Paris, France.,INSERM, UMR- 999, Hôpital Marie-Lannelongue, Le Plessis-Robinson, France
| | - Faïez Zannad
- INSERM, UMR-1116, Université de Lorraine, Nancy, France.,Department of Cardiology, CHRU-Nancy, Université de Lorraine, Nancy, France.,CHRU-Nancy, INSERM, CIC 1433, Université de Lorraine, Nancy, France
| | - Patrick Rossignol
- INSERM, UMR-1116, Université de Lorraine, Nancy, France.,CHRU-Nancy, INSERM, CIC 1433, Université de Lorraine, Nancy, France.,FCRIN INI-CRCT, Nancy, France
| | - Pierre-Yves Marie
- INSERM, UMR-1116, Université de Lorraine, Nancy, France.,CHRU-Nancy, Université de Lorraine, Nuclear Medicine & Nancyclotep Platform, Nancy, France
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Lavine SJ, Raby K. Adverse Outcomes with Eccentric Hypertrophy in a Community Based University Cohort with Aortic Stenosis. Am J Med Sci 2021; 362:442-452. [PMID: 34400150 DOI: 10.1016/j.amjms.2021.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 05/04/2021] [Accepted: 08/09/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Aortic stenosis (AS) patients with eccentric hypertrophy (Ecc-LVH) have increased left ventricular (LV) size and possibly reduced ejection fraction (EF). However, previous studies suggest worse outcomes with concentric remodeling and hypertrophy. We hypothesized that Ecc-LVH pattern in AS patients will also be associated with greater heart failure (HF) and all-cause mortality (ACM). METHODS We queried the electronic medical record from a community-based university practice for all AS patients. We included patients with >60 days follow-up and interpretable Doppler echocardiograms. We recorded demographics, Doppler-echo parameters, laboratories, HF readmission and ACM with follow-up to 2083 days. There were 329 patients divided into 4 groups based on the presence of LV hypertrophy (LVH) and relative wall thickness (RWT) by echocardiography. Ecc-LVH had RWT<0.43 and LVH. RESULTS Patients with severe AS were older, had greater coronary disease prevalence, lower hemoglobin, greater LV mass index, more abnormal diastolic function, greater HF and ACM. Multivariate Cox proportional analysis revealed that valvulo-arterial impedance (p=0.017) and Ecc-LVH (p=0.033) were HF predictors. Brain natriuretic peptide>100 pg/ml (p<0.001) and Ecc-LVH (p=0.019) were ACM predictors. ACM was increased in Ecc-LVH patients with both moderate (HR=3.67-8.18 vs other geometries, p=0.007-0.0007) and severe AS (HR=3.94-9.48 vs normal and concentric remodeling, p=0.0002). In patients with HF, Ecc-LVH was associated with greater HF in moderate AS vs normal geometry (HR=3.28, p=0.0135) and concentric remodeling (HR=2.66, p=0.0472). CONCLUSIONS Patients with AS and Ecc-LVH have greater ACM than other LV geometries with both moderate and severe AS and greater HF in moderate AS.
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Affiliation(s)
- Steven J Lavine
- Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States; Washington University of St. Louis, St. Louis, MO, United States.
| | - Kirsten Raby
- Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
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Countouris ME, Villanueva FS, Berlacher KL, Cavalcante JL, Parks WT, Catov JM. Association of Hypertensive Disorders of Pregnancy With Left Ventricular Remodeling Later in Life. J Am Coll Cardiol 2021; 77:1057-1068. [PMID: 33632480 PMCID: PMC10544734 DOI: 10.1016/j.jacc.2020.12.051] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 12/21/2020] [Accepted: 12/21/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND Hypertensive disorders of pregnancy (HDP) are associated with short-term cardiac structure and function abnormalities, but later life changes are not well studied. OBJECTIVES This study aimed to determine if HDP history is associated with echocardiographic differences 8 to 10 years after delivery, and if subgroups with placental maternal vascular malperfusion (MVM) lesions or current hypertension may be particularly affected. METHODS Women with pregnancies delivered from 2008 to 2009 were selected from a clinical cohort with abstracted pregnancy and placental pathology data to undergo transthoracic echocardiography (2017 to 2020). Medical history, blood pressure, and weight were measured at the study visit. RESULTS The authors enrolled 132 women (10 ± 1 years post-delivery, age 38 ± 6 years): 102 with normotensive pregnancies and 30 with HDP: pre-eclampsia (n = 21) or gestational hypertension (n = 9). Compared with women with normotensive pregnancies, those with HDP history were more likely to have current hypertension (63% vs. 26%; p < 0.001). After adjusting for age, race, MVM lesions, body mass index, current hypertension, and hemoglobin A1c, women with HDP history had higher interventricular septal thickness (β = 0.08; p = 0.04) and relative wall thickness (β = 0.04; p = 0.04). In subgroup analyses, those with both HDP history and current hypertension had a higher proportion of left ventricular remodeling (79.0%) compared with all other groups (only HDP [36.4%; p = 0.01], only current hypertension [46.2%; p = 0.02], and neither HDP nor hypertension [38.2%; p < 0.001]), and lower mitral inflow E/A and annular e'. Accounting for placental MVM lesions did not impact results. CONCLUSIONS Women with both HDP history and current hypertension have pronounced differences in left ventricular structure and function a decade after pregnancy, warranting continued surveillance and targeted therapies for cardiovascular disease prevention.
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Affiliation(s)
- Malamo E Countouris
- University of Pittsburgh Medical Center Heart and Vascular Institute, Pittsburgh, Pennsylvania, USA.
| | - Flordeliza S Villanueva
- University of Pittsburgh Medical Center Heart and Vascular Institute, Pittsburgh, Pennsylvania, USA
| | - Kathryn L Berlacher
- University of Pittsburgh Medical Center Heart and Vascular Institute, Pittsburgh, Pennsylvania, USA
| | - João L Cavalcante
- Minneapolis Heart Institute, Abbott Northwestern Hospital, Minneapolis, Minnesota, USA
| | - W Tony Parks
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Janet M Catov
- Department of Obstetrics, Gynecology, and Reproductive Sciences and Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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10
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Asymptomatic Left Ventricular Dysfunction: Is There a Role for Screening in General Population? Heart Fail Clin 2021; 17:179-186. [PMID: 33673943 DOI: 10.1016/j.hfc.2020.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Stage A and B heart failure (HF) include asymptomatic patients without and with structural cardiac disorder, respectively. Asymptomatic left ventricular (LV) dysfunction represents an early stage of HF that should be recognized to prevent overt HF development. Echocardiography plays a pivotal role in assessment of cardiac structure and function and represents the ideal imaging technique for screening in the general population, thanks to its availability, feasibility, and low cost. Traditional echocardiography, with LV systolic and diastolic function and cardiac remodeling assessment, is usually performed. Development of new technologies may offer additional information and insights in detection of early LV dysfunction.
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11
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Wang Q, Tan K, Xia H, Gao Y. The Further Negative Effect of Hyperuricemia on Left Ventricular Structure and Function in Patients with Type 2 Diabetes Mellitus: A Transthoracic 3D Speckle Tracking Imaging Study. Metab Syndr Relat Disord 2019; 17:436-443. [PMID: 31403396 DOI: 10.1089/met.2019.0048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Affiliation(s)
- Qingqing Wang
- Department of Ultrasound, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Kaibin Tan
- Department of Ultrasound, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Hongmei Xia
- Department of Ultrasound, Xinqiao Hospital, The Third Military Medical University, Chongqing, China
| | - Yunhua Gao
- Department of Ultrasound, Xinqiao Hospital, The Third Military Medical University, Chongqing, China
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12
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Zheng RH, Bai XJ, Zhang WW, Wang J, Bai F, Yan CP, James EA, Bose HS, Wang NP, Zhao ZQ. Liraglutide attenuates cardiac remodeling and improves heart function after abdominal aortic constriction through blocking angiotensin II type 1 receptor in rats. DRUG DESIGN DEVELOPMENT AND THERAPY 2019; 13:2745-2757. [PMID: 31496651 PMCID: PMC6690048 DOI: 10.2147/dddt.s213910] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 07/19/2019] [Indexed: 12/27/2022]
Abstract
Objective Angiotensin II (Ang II) is known to contribute to the pathogenesis of heart failure by eliciting cardiac remodeling and dysfunction. The glucagon-like peptide-1 (GLP-1) has been shown to exert cardioprotective effects in animals and patients. This study investigates whether GLP-1 receptor agonist liraglutide inhibits abdominal aortic constriction (AAC)-induced cardiac fibrosis and dysfunction through blocking Ang II type 1 receptor (AT1R) signaling. Methods Sprague-Dawley rats were subjected to sham operation and abdominal aortic banding procedure for 16 weeks. In treated rats, liraglutide (0.3 mg/kg) was subcutaneously injected twice daily or telmisartan (10 mg/kg/day), the AT1R blocker, was administered by gastric gavage. Results Relative to the animals with AAC, liraglutide reduced protein level of the AT1R and upregulated the AT2R, as evidenced by reduced ratio of AT1R/AT2R (0.59±0.04 vs. 0.91±0.06, p<0.05). Furthermore, the expression of angiotensin converting enzyme 2 was upregulated, tissue levels of malondialdehyde and B-type natriuretic peptide were reduced, and superoxide dismutase activity was increased. Along with a reduction in HW/BW ratio, cardiomyocyte hypertrophy was inhibited. In coincidence with these changes, liraglutide significantly decreased the populations of macrophages and myofibroblasts in the myocardium, which were accompanied by reduced protein levels of transforming growth factor beta1, Smad2/3/4, and upregulated smad7. The synthesis of collagen I and III was inhibited and collagen-rich fibrosis was attenuated. Consistent with these findings, cardiac systolic function was preserved, as shown by increased left ventricular systolic pressure (110±5 vs. 99±2 mmHg, p<0.05), ejection fraction (83%±2% vs. 69%±4%, p<0.05) and fraction shortening (49%±2% vs. 35%±3%, p<0.05). Treatment with telmisartan provided a comparable level of protection as compared with liraglutide in all the parameters measured. Conclusion Taken together, liraglutide ameliorates cardiac fibrosis and dysfunction, potentially via suppressing the AT1R-mediated events. These data indicate that liraglutide might be selected as an add-on drug to prevent the progression of heart failure.
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Affiliation(s)
- Rong-Hua Zheng
- Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China.,Department of Medicine, Linfen Vocational and Technical College, Linfen, Shanxi, People's Republic of China
| | - Xiao-Jie Bai
- Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China
| | - Wei-Wei Zhang
- Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China
| | - Jing Wang
- Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China
| | - Feng Bai
- Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China
| | - Cai-Ping Yan
- Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China
| | - Erskine A James
- Department of Internal Medicine, Navicent Health, Macon, GA, USA
| | - Himangshu S Bose
- Basic Biomedical Sciences, Mercer University School of Medicine, Savannah, GA, USA
| | - Ning-Ping Wang
- Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China.,Basic Biomedical Sciences, Mercer University School of Medicine, Savannah, GA, USA
| | - Zhi-Qing Zhao
- Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China.,Basic Biomedical Sciences, Mercer University School of Medicine, Savannah, GA, USA
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13
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Fabiani I, Pugliese NR, Santini C, Miccoli M, D'Agostino A, Rovai I, Mazzola M, Pedrinelli R, Dini FL. The assessment of pressure-volume relationship during exercise stress echocardiography predicts left ventricular remodeling and eccentric hypertrophy in patients with chronic heart failure. Cardiovasc Ultrasound 2019; 17:6. [PMID: 30954080 PMCID: PMC6451304 DOI: 10.1186/s12947-019-0157-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 03/26/2019] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND The contractile response of patients with heart failure (HF) may be assessed by exercise stress echocardiography (ESE)-derived indexes. We sought to test whether ESE parameters are useful to identify the risk of adverse left ventricular (LV) remodeling in patients with chronic HF and reduced or mildly reduced LV ejection fraction (EF). METHODS We enrolled 155 stabilized patients (age: 62 ± 11 years, 17% female, coronary artery disease 47%) with chronic HF, LV EF ≤50% and LV end-diastolic volume index > 75 ml/m2. All patients underwent a symptom-limited graded bicycle semi-supine ESE, with evaluation of peak stress LV EF, end-systolic pressure-volume relation (ESPVR, i.e. LV elastance) and cardiac power output to LV mass (CPOM). A complete echocardiographic study was performed at baseline and after 6 ± 3 months. Adverse LV remodeling was defined as the association of eccentric LV hypertrophy (LV mass: ≥115 g/m2 for male and ≥ 95 g/m2 for women, and relative wall thickness < 0.32) with an increase in LV end-systolic volume index ≥10% at six months. RESULTS Adverse LV remodeling was detected in 34 (22%) patients. After adjustment for clinical, biochemical and echocardiographic data, peak ESPVR resulted in the most powerful independent predictor of adverse LV remodeling (OR: 12.5 [95% CI 4.5-33]; p < 0.0001) followed by ischemic aetiology (OR: 2.64 [95% 1.04-6.73]; p = 0.04). CONCLUSION In patients with HF and reduced or mildly reduced EF, a compromised ESE-derived peak ESPVR, that reflects impaired LV contractility, resulted to be the most powerful predictor of adverse LV remodeling.
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Affiliation(s)
- Iacopo Fabiani
- Cardiac, Thoracic and Vascular Department, University of Pisa, Pisa, Italy
- Department of Surgical, Medical, Molecular and Critical Care Pathology, Fresno, USA
| | - Nicola Riccardo Pugliese
- Cardiac, Thoracic and Vascular Department, University of Pisa, Pisa, Italy.
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy.
| | - Claudia Santini
- Cardiac, Thoracic and Vascular Department, University of Pisa, Pisa, Italy
| | - Mario Miccoli
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | | | - Ilaria Rovai
- Cardiac, Thoracic and Vascular Department, University of Pisa, Pisa, Italy
| | - Matteo Mazzola
- Cardiac, Thoracic and Vascular Department, University of Pisa, Pisa, Italy
| | - Roberto Pedrinelli
- Cardiac, Thoracic and Vascular Department, University of Pisa, Pisa, Italy
| | - Frank Lloyd Dini
- Cardiac, Thoracic and Vascular Department, University of Pisa, Pisa, Italy
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14
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Interactive role of diastolic dysfunction and ventricular remodeling in asymptomatic subjects at increased risk of heart failure. Int J Cardiovasc Imaging 2019; 35:1231-1240. [DOI: 10.1007/s10554-019-01560-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 02/11/2019] [Indexed: 10/27/2022]
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15
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Dini FL, Galeotti GG, Terlizzese G, Fabiani I, Pugliese NR, Rovai I. Left Ventricular Mass and Thickness: Why Does It Matter? Heart Fail Clin 2019; 15:159-166. [PMID: 30832808 DOI: 10.1016/j.hfc.2018.12.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Several left ventricular geometric patterns have been described both in healthy and pathologic hearts. Left ventricular mass, wall thickness, and the ratio of wall thickness to radius are important measures to characterize the spectrum of left ventricular geometry. For clinicians, an increase in left ventricular mass is the hallmark of left ventricular hypertrophy. Although pathologic hypertrophy initially can be compensatory, eventually it may become maladaptive and evolve toward progressive left ventricular dysfunction and heart failure. In particular, patients who show left ventricular dilation and hypertrophy in association with a low relative wall thickness are likely to carry the highest risk.
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Affiliation(s)
- Frank Lloyd Dini
- Cardiac, Thoracic and Vascular Department, University of Pisa, Pisa, Italy.
| | | | | | - Iacopo Fabiani
- Cardiac, Thoracic and Vascular Department, University of Pisa, Pisa, Italy; Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine, University of Pisa, Pisa, Italy
| | - Nicola Riccardo Pugliese
- Cardiac, Thoracic and Vascular Department, University of Pisa, Pisa, Italy; Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine, University of Pisa, Pisa, Italy
| | - Ilaria Rovai
- Cardiac, Thoracic and Vascular Department, University of Pisa, Pisa, Italy
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16
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Faconti L, Mills CE, Govoni V, Gu H, Morant S, Jiang B, Cruickshank JK, Webb AJ. Cardiac effects of 6 months' dietary nitrate and spironolactone in patients with hypertension and with/at risk of type 2 diabetes, in the factorial design, double-blind, randomized controlled VaSera trial. Br J Clin Pharmacol 2018; 85:169-180. [PMID: 30294825 DOI: 10.1111/bcp.13783] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 08/13/2018] [Accepted: 09/09/2018] [Indexed: 12/12/2022] Open
Abstract
AIMS The aims of the present study were to explore whether a long-term intervention with dietary nitrate [(NO3 - ), a potential tolerance-free source of beneficial vasoactive nitric oxide] and spironolactone (to oppose aldosterone's potential deleterious cardiovascular effects) improve cardiac structure/function, independently of blood pressure (BP), in patients with/at risk of type 2 diabetes (a population at risk of heart failure). METHODS A subsample of participants in our double-blind, randomized, factorial-design intervention (VaSera) trial of active beetroot juice as a nitrate source (≤11.2 mmol) or placebo (nitrate depleted) beetroot juice, and either ≤50 mg spironolactone or ≤16 mg doxazosin (control), had transthoracic cardiac ultrasounds at baseline (n = 105), and at 3 months and 6 months (n = 87) after the start of the intervention. Analysis was by modified intent-to-treat. RESULTS Nitrate-containing juice (n = 40) decreased left ventricular (LV) end-diastolic volume {-6.3 [95% confidence interval (CI) -11.1, -1.6] ml} and end-systolic volume [-3.2 (95% CI -5.9, -0.5) ml], and increased end-diastolic mass/volume ratio [+0.04 (95% CI 0.00, 0.07)], relative to placebo juice (n = 47). Spironolactone (n = 44) reduced relative wall thickness compared with doxazosin (n = 43) [-0.01 (95% CI -0.02, -0.00)]. Although spironolactone reduced LV mass index relative to baseline [-1.48 (95% CI -2.08, -0.88) g m-2.7 ], there was no difference vs. doxazosin [-0.85 (95% CI -1.76, 0.05) g m-2.7 ]. Spironolactone also decreased the E/A ratio [-0.12 (95% CI -0.19, -0.04)] and increased S' (a tissue-Doppler systolic function index) by 0.52 (95% CI 0.05, 1.0) cm s-1 . BP did not differ between the juices, or between the drugs. CONCLUSIONS Six months' dietary nitrate decreased LV volumes ~5%, representing new, sustained, BP-independent benefits on cardiac structure, extending mechanisms characterized in preclinical models of heart failure. Spironolactone's effects on cardiac remodelling and systolic-diastolic function, although confirmatory, were independent of BP.
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Affiliation(s)
- Luca Faconti
- Department of Clinical Pharmacology, School of Cardiovascular Medicine and Sciences, King's College London British Heart Foundation Centre, London, UK.,Department of Nutritional Sciences, School of Life Course Sciences, King's College London, London, UK.,Biomedical Research Centre, Clinical Research Facility, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Charlotte Elizabeth Mills
- Department of Nutritional Sciences, School of Life Course Sciences, King's College London, London, UK.,Biomedical Research Centre, Clinical Research Facility, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Virginia Govoni
- Department of Nutritional Sciences, School of Life Course Sciences, King's College London, London, UK.,Biomedical Research Centre, Clinical Research Facility, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Haotian Gu
- Department of Clinical Pharmacology, School of Cardiovascular Medicine and Sciences, King's College London British Heart Foundation Centre, London, UK.,Biomedical Research Centre, Clinical Research Facility, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Steven Morant
- Medicines Monitoring Unit (MEMO), University of Dundee, Dundee, UK
| | - Benju Jiang
- Department of Clinical Pharmacology, School of Cardiovascular Medicine and Sciences, King's College London British Heart Foundation Centre, London, UK.,Biomedical Research Centre, Clinical Research Facility, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - J Kennedy Cruickshank
- Department of Nutritional Sciences, School of Life Course Sciences, King's College London, London, UK.,Biomedical Research Centre, Clinical Research Facility, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Andrew James Webb
- Department of Clinical Pharmacology, School of Cardiovascular Medicine and Sciences, King's College London British Heart Foundation Centre, London, UK.,Biomedical Research Centre, Clinical Research Facility, Guy's and St Thomas' NHS Foundation Trust, London, UK
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17
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Basavalingappa RH, Massilamany C, Krishnan B, Gangaplara A, Rajasekaran RA, Afzal MZ, Riethoven JJ, Strande JL, Steffen D, Reddy J. β1-Adrenergic Receptor Contains Multiple IA k and IE k Binding Epitopes That Induce T Cell Responses with Varying Degrees of Autoimmune Myocarditis in A/J Mice. Front Immunol 2017; 8:1567. [PMID: 29209317 PMCID: PMC5701947 DOI: 10.3389/fimmu.2017.01567] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 11/01/2017] [Indexed: 11/13/2022] Open
Abstract
Myocarditis/dilated cardiomyopathy (DCM) patients can develop autoantibodies to various cardiac antigens and one major antigen is β1-adrenergic receptor (β1AR). Previous reports indicate that animals immunized with a β1AR fragment encompassing, 197–222 amino acids for a prolonged period can develop DCM by producing autoantibodies, but existence of T cell epitopes, if any, were unknown. Using A/J mice that are highly susceptible to lymphocytic myocarditis, we have identified β1AR 171–190, β1AR 181–200, and β1AR 211–230 as the major T cell epitopes that bind major histocompatibility complex class II/IAk or IEk alleles, and by creating IAk and IEk dextramers, we demonstrate that the CD4 T cell responses to be antigen-specific. Of note, all the three epitopes were found also to stimulate CD8 T cells suggesting that they can act as common epitopes for both CD4 and CD8 T cells. While, all epitopes induced only mild myocarditis, the disease-incidence was enhanced in animals immunized with all the three peptides together as a cocktail. Although, antigen-sensitized T cells produced mainly interleukin-17A, their transfer into naive animals yielded no disease. But, steering for T helper 1 response led the T cells reacting to one epitope, β1AR 181–200 to induce severe myocarditis in naive mice. Finally, we demonstrate that all three β1AR epitopes to be unique for T cells as none of them induced antibody responses. Conversely, animals immunized with a non-T cell activator, β1AR 201–220, an equivalent of β1AR 197–222, had antibodies comprising of all IgG isotypes and IgM except, IgA and IgE. Thus, identification of T cell and B cell epitopes of β1AR may be helpful to determine β1AR-reactive autoimmune responses in various experimental settings in A/J mice.
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Affiliation(s)
- Rakesh H Basavalingappa
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE, United States
| | - Chandirasegaran Massilamany
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE, United States
| | - Bharathi Krishnan
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE, United States
| | - Arunakumar Gangaplara
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE, United States
| | - Rajkumar A Rajasekaran
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE, United States
| | - Muhammad Z Afzal
- Department of Medicine, Division of Cardiology, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Jean-Jack Riethoven
- Center for Biotechnology, University of Nebraska-Lincoln, Lincoln, NE, United States
| | - Jennifer L Strande
- Department of Medicine, Division of Cardiology, Medical College of Wisconsin, Milwaukee, WI, United States
| | - David Steffen
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE, United States
| | - Jay Reddy
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE, United States
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