Prediction of left ventricle systolic dysfunction in mice using gene expression profiling
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE12413 | GEO | 2008/09/19
SECONDARY ACCESSION(S): PRJNA113103
REPOSITORIES: GEO
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Project description:We tested the hypothesis that a set of differentially expressed genes could be used to predict cardiovascular phenotype in mice after prolonged catecholamine stress. Experiment Overall Design: We observed that WT FVB and B2KO mice developed systolic dysfunction in response to continuous catecholamine infusion while WT C57 mice developed diastolic dysfunction. Using these mice as the derivation cohort, we identified a set of 83 genes whose differential expression correlated with left ventricle systolic dysfunction. The gene set was then used to accurately predict development of left ventricle systolic dysfunction in a separate group of mice (WT B6129SF2/J) after catecholamine stress.
2009-10-26 | E-GEOD-12413 | biostudies-arrayexpress
Project description:BackgroundDysfunction of the interventricular septum has been implicated in right ventricular (RV) failure. However, little is known about the relationship between ventricular septal and RV function in patients without clinical cardiovascular disease. We hypothesized that better septal function would be associated with higher RV ejection fraction and lower RV mass and volume by cardiac MRI.MethodsIn the Multi-Ethnic Study of Atherosclerosis (MESA), cardiac MRI was performed on community-based participants without clinical cardiovascular disease. Images were analyzed by the harmonic phase method to measure peak circumferential systolic midventricular strain for each wall (anterior, lateral, inferior, and septal). Multivariable linear regression and generalized additive models were used to assess the relationship between septal strain and RV morphology.ResultsThere were 917 participants (45.7% women) with a mean age of 65.7 years. Better septal function was associated with higher RV ejection fraction in a nonlinear fashion after adjustment for all covariates (P = .03). There appeared to be a threshold effect for the contribution of septal strain to RV systolic function, with an almost linear decrement in RV ejection fraction with septal strain from -18% to -10%. Septal function was not related to RV mass or volume.ConclusionsInterventricular septal function was linked to RV systolic function independent of other left ventricular regions, even in individuals without clinical cardiovascular disease. This finding confirms animal and human research suggesting the importance of septal function to the right ventricle and implies that changes in septal function could herald RV dysfunction.Trial registryClinicalTrials.gov; No.: NCT00005487; URL: www.clinicaltrials.gov.
| S-EPMC3148792 | biostudies-literature
Project description:BackgroundIn childhood cancer survivors (CCS) at risk for heart failure, echocardiographic surveillance recommendations are currently based on anthracyclines and chest-directed radiotherapy dose. Whether the ejection fraction (EF) measured at an initial surveillance echocardiogram can refine these recommendations is unknown.ObjectivesThe purpose of this study was to assess the added predictive value of EF at >5 years after cancer diagnosis to anthracyclines and chest-directed radiotherapy dose in CCS, for the development of left ventricular dysfunction with an ejection fraction <40% (LVD40).MethodsEchocardiographic surveillance was performed in 299 CCS from the Emma Children's Hospital in the Netherlands. Cox regression models were built including cardiotoxic cancer treatment exposures with and without EF to estimate the probability of LVD40 at 10-year follow-up. Calibration, discrimination, and reclassification were assessed. Results were externally validated in 218 CCS.ResultsCumulative incidences of LVD40 at 10-year follow-up were 3.7% and 3.6% in the derivation and validation cohort, respectively. The addition of EF resulted in an integrated area under the curve increase from 0.74 to 0.87 in the derivation cohort and from 0.72 to 0.86 in the validation cohort (likelihood ratio p < 0.001). Reclassification of CCS without LVD40 improved significantly (noncase continuous net reclassification improvement 0.50; 95% confidence interval [CI]: 0.40 to 0.60). A predicted LVD40 probability ≤3%, representing 75% of the CCS, had a negative predictive value of 99% (95% CI: 98% to 100%) for LVD40 within 10 years. However, patients with midrange EF (40% to 49%) at initial screening had an incidence of LVD40 of 11% and a 7.81-fold (95% CI: 2.07- to 29.50-fold) increased risk of LV40 at follow-up.ConclusionsIn CCS, an initial surveillance EF, in addition to anthracyclines and chest-directed radiotherapy dose, improves the 10-year prediction for LVD40. Through this strategy, both the identification of low-risk survivors in whom the surveillance frequency may be reduced and a group of survivors at increased risk of LVD40 could be identified.
| S-EPMC8352242 | biostudies-literature
Project description:To investigate the role of NBCe1-B in the heart we performed RNAseq experiments to examine genome-wide transcriptional changes in female NBCe1-B/C knockout (KO) mice compared to female wild-type (WT) mice.
2024-09-05 | GSE223324 | GEO
Project description:Heart failure affects 1-2% of the adult population worldwide and coronary artery disease (CAD) is the underlying etiology of heart failure in 70% of the patients. The pathway of apelin and its apelin receptor (APJ) was implicated in the pathogenesis of heart failure in animal models, but a similar role in humans is unknown. We studied a functional variant, rs9943582 (-154G/A), at the 5'-untranslated region, that was associated with decreased expression of the APJ receptor gene (APLNR) in a population consisting of 1,751 CAD cases and 1,022 controls. Variant rs9943582 was not associated with CAD, but among CAD patients, it showed significant association with left ventricular systolic dysfunction (431 CAD patients with left ventricular systolic dysfunction (LV ejection fraction or LVEF< 40%) versus 1,046 CAD patients without LV systolic dysfunction (LVEF>50%) (P-adj = 6.71 × 10(-5), OR = 1.43, 95% CI, 1.20-1.70). Moreover, rs9943582 also showed significant association with quantitative echocardiographic parameters, including left ventricular end-diastolic diameter (effect size: increased 1.67 ± 0.43 mm per risk allele A, P = 1.15 × 10(-4)), left atrial size (effect size: increased 2.12 ± 0.61 mm per risk allele A, P = 9.56 × 10(-4)) and LVEF (effect size: decreased 2.59 ± 0.32 percent per risk allele A, P = 7.50 × 10(-15)). Our findings demonstrate that allele A of rs9943582 was significantly associated with left ventricular systolic dysfunction, left ventricular end-diastolic diameter, the left atrial diameter and LVEF in the CAD population, which suggests an important role of the apelin/APJ system in the pathology of heart failure associated with ischemic heart disease.
| S-EPMC4438007 | biostudies-literature
Project description:Candidates for chronic warfarin therapy often have co-morbid conditions, such as heart failure, with reduced left ventricular ejection fraction. Previous reports have demonstrated an increased risk of over-anticoagulation due to reduced warfarin dose requirement in patients with decompensated heart failure. However, the influence of left ventricular systolic dysfunction (LVSD), defined as left ventricular ejection fraction <40%, on warfarin response has not been evaluated. Here, we assess the influence of LVSD on warfarin dose, anticoagulation control (percent time in target range), and risk of over-anticoagulation (international normalized ratio >4) and major hemorrhage. Of the 1,354 patients included in this prospective cohort study, 214 patients (16%) had LVSD. Patients with LVSD required 11% lower warfarin dose compared with those without LVSD (p <0.001) using multivariate linear regression analyses. Using multivariate Cox proportional hazards model, patients with LVSD experienced similar levels of anticoagulation control (percent time in target range: 51% vs 53% p = 0.15), risk of over-anticoagulation (international normalized ratio >4; hazard ratio 1.01, 95% confidence interval 0.82 to 1.25; p = 0.91), and risk of major hemorrhage (hazard ratio 1.11; 95% confidence interval 0.70 to 1.74; p = 0.66). Addition of LVSD variable in the model increased the variability explained from 35% to 36% for warfarin dose prediction. In conclusion, our results demonstrate that patients with LVSD require lower doses of warfarin. Whether warfarin dosing algorithms incorporating LVSD in determining initial doses improves outcomes needs to be evaluated.
| S-EPMC4962063 | biostudies-literature
Project description:BackgroundExperimental autoimmune myocarditis (EAM) is a common animal model for the investigation of the pathophysiology of myocarditis. Because of diverging findings from previous studies, we performed serial echocardiographic examinations throughout the course of the disease and investigated the dimensions of the murine heart and left ventricular (LV) systolic function.Materials and methodsExperimental autoimmune myocarditis was induced in male Balb/c mice by subcutaneous injection of a fragment of the ?-myosin heavy chain (MyHC-? 614-629: Ac-SLKLMATLFSTYASAD). Transthoracic echocardiography was performed on days 0, 7 and 21 in healthy animals and mice with EAM.ResultsExperimental autoimmune myocarditis was associated with a reduction in LV systolic function and an increase in LV internal diameter in diastole (LVIDd) and systole (LVIDs) 7 days postimmunization. After 21 days, EAM led to a significant increase in LV-thickness (1.3-fold increase in LV anterior wall diameter in diastole [LVAWDd]), but there was no difference in LV systolic function between immunized animals and healthy controls. LV-thickness correlated well with the severity of myocarditis in the histopathological examination (LVAWDd: rs = 0.603, P = 0.003, LV anterior wall diameter in systole (LVAWDs): rs = 0.718, P < 0.0001).ConclusionOur results indicate that EAM leads to an initial dilatation of the LV that is followed by ventricular "hypertrophy." On day 21, there was no significant difference in LV systolic function between immunized animals and controls. Furthermore, the ageing of the animals had a major impact on the echocardiographic parameters; therefore, the use of healthy age-matched controls seems warranted when echocardiography is performed in rodents.
| S-EPMC6771695 | biostudies-literature
Project description:Left ventricular systolic dysfunction (LVSD) defined by ejection fraction (EF) <40% is common, serious but treatable, and correct diagnosis is the cornerstone of effective treatment. Biomarkers may help to diagnose LVSD and give insight into the pathophysiology. The immune system is activated in LVSD, and the immunomodulatory molecule human leukocyte antigen-G (HLA-G) may be involved. The primary aim was to measure soluble HLA-G (sHLA-G) in the blood in different stages of LVSD (<30% and 30-40%), in the midrange EF 40-50%, and in preserved EF ≥ 50% and to validate sHLA-G as a LVSD biomarker. The secondary aim was to examine associations between HLA-G gene polymorphisms influencing expression levels and LVSD. The 260 study participants were ≥75 years old, many with risk factors for heart disease or with known heart disease. Soluble HLA-G was significantly and uniformly higher in the groups with EF < 50% (<30, 30-40, and 40-50%) compared to EF > 50% (p < 0.0001). N-terminal fragment-pro-B-type natriuretic peptide (NT-proBNP) and uric acid values were inversely related to EF. According to Receiver Operating Characteristic (ROC) curves NT-proBNP outperformed both sHLA-G and uric acid as biomarkers of LVSD. Soluble HLA-G in blood plasma was elevated in LVSD regardless of EF. A novel finding was that a combined 14 bp ins-del/+3142 SNP HLA-G haplotype was associated with EF < 40%.
| S-EPMC5075317 | biostudies-literature
Project description:ObjectivesCardiac involvement is common in systemic sclerosis (SSc) patients. In this study, we aimed to systematically evaluate the relationship between SSc and left ventricular dysfunction (LVD), especially the left ventricular diastolic dysfunction, by ultrasound and cardiac magnetic resonance data.MethodsWe searched The Cochrane Library, PubMed and Embase databases collected studies about comparing LVD parameters in SSc patients and controls from establishment to January 2022. Furthermore, we also performed a two-sample MR using summary statistics from genome-wide association studies (GWAS) important LVD parameters, including left ventricular end-diastolic volume (LVEDV), left ventricular mass (LVM) and left ventricular ejection fraction (LVEF).ResultsOur meta-analysis included 31 eligible studies with 1448 SSc patients. According to the results, SSc patients had lower peak of early diastolic flow velocity/peak of late diastolic flow velocity ratio (E/A ratio), E, trans-mitral early filling peak velocity (E'), and left ventricular end-diastolic diameter (LVEDD) compared to controls. The E/E' ratio, A, left ventricular isovolumetric relaxation time (IVRT), deceleration Time (DT) and left atrial (LA) diameter were higher in SSc patients in comparison with controls. Moreover, we observed that the SSc patients had lower LVEF than controls. And in MR analysis, we also found that SSc was causally correlated with LVEF (OR = 0.9966, 95% CI 0.9935-0.998, P = 0.0398). However, unfortunately, there was no significant correlation between SSC and LVM (OR = 1.0048, 95% CI 0.9919-1.0179, P = 0.4661) and LVEDV (LVEDV OR = 0.9976, 95%CI 0.9888-1.0066, P = 0.6019).ConclusionSSc patients had diastolic/systolic dysfunction. However, MR analysis cannot confirm the genetic relationship between SSc and LVDD because of insufficient data. More research is needed to confirm the causal relationship between the two.
| S-EPMC10020007 | biostudies-literature
Project description:BACKGROUND:Late systolic load has been shown to cause diastolic dysfunction in animal models. Although the systolic loading sequence of the ventricular myocardium likely affects its coupling with the left atrium (LA), this issue has not been investigated in humans. We aimed to assess the relationship between the myocardial loading sequence and LA function in human hypertension. METHODS AND RESULTS:We studied 260 subjects with hypertension and 19 normotensive age- and sex-matched controls. Time-resolved central pressure and left ventricular geometry were measured with carotid tonometry and cardiac magnetic resonance imaging, respectively, for computation of time-resolved ejection-phase myocardial wall stress (MWS). The ratio of late/early ejection-phase MWS time integrals was computed as an index of late systolic myocardial load. Atrial mechanics were measured with cine-steady-state free-precession magnetic resonance imaging using feature-tracking algorithms. Compared with normotensive controls, hypertensive participants demonstrated increased late/early ejection-phase MWS and reduced LA function. Greater levels of late/early ejection-phase MWS were associated with reduced LA conduit, reservoir, and booster pump LA function. In models that included early and late ejection-phase MWS as independent correlates of LA function, late systolic MWS was associated with lower, whereas early systolic MWS was associated with greater LA function, indicating an effect of the relative loading sequence (late versus early MWS) on LA function. These relationships persisted after adjustment for multiple potential confounders. CONCLUSIONS:A myocardial loading sequence characterized by prominent late systolic MWS was independently associated with atrial dysfunction. In the context of available experimental data, our findings support the deleterious effects of late systolic loading on ventricular-atrial coupling.
| S-EPMC5484079 | biostudies-literature