scholarly journals Circulating E3 ligases are novel and sensitive biomarkers for diagnosis of acute myocardial infarction

2015 ◽  
Vol 128 (11) ◽  
pp. 751-760 ◽  
Author(s):  
Qiu-Yue Han ◽  
Hong-Xia Wang ◽  
Xiao-Hong Liu ◽  
Cai-Xia Guo ◽  
Qi Hua ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Time Course ◽  
Troponin I ◽  
Expression Patterns ◽  
Pcr Analysis ◽  
Mouse Heart ◽  
Roc Curve Analysis ◽  
Similar Time ◽  
E3 Ligases

Ubiquitin ligase (E3) is a decisive element of the ubiquitin-proteasome system (UPS), which is the main pathway for intracellular protein turnover. Recently, circulating E3 ligases have been increasingly considered as cancer biomarkers. In the present study, we aimed to determine if cardiac-specific E3 ligases in circulation can serve as novel predictors for early diagnosis of acute myocardial infarction (AMI). By screening and verifying their tissue expression patterns with microarray and real-time PCR analysis, six of 261 E3 ligases, including cardiac-specific Rnf207 and cardiac- and muscle-enriched Fbxo32/atrogin-1, Trim54/MuRF3, Trim63/MuRF1, Kbtbd10/KLHL41, Asb11 and Asb2 in mouse heart, were selected for the present study. In the AMI rats, the levels of five E3 ligases including Rnf207, Fbxo32, Trim54, Trim63 and Kbtbd10 in the plasma were significantly increased compared with control animals. Especially, the plasma levels of Rnf207 was markedly increased at 1 h, peaked at 3 h and decreased at 6–24 h after ligation. Further evaluation of E3 ligases in AMI patients confirmed that plasma Rnf207 level increased significantly compared with that in healthy people and patients without AMI, and showed a similar time course to that in AMI rats. Simultaneously, plasma level of cardiac troponin I (cTnI) was measured by ELISA assays. Finally, receiver operating characteristic (ROC) curve analysis indicated that Rnf207 showed a similar sensitivity and specificity to the classic biomarker troponin I for diagnosis of AMI. Increased cardiac-specific E3 ligase Rnf207 in plasma may be a novel and sensitive biomarkers for AMI in humans.

Alterations in serum selenium levels and their relation to troponin I in acute myocardial infarction

2010 ◽  
Vol 345 (1-2) ◽  
pp. 23-27 ◽  
Author(s):  
Barbara Kutil ◽  
Petr Ostadal ◽  
Jiri Vejvoda ◽  
Jiri Kukacka ◽  
Jana Cepova ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Troponin I ◽  
Serum Selenium ◽  
Serum Selenium Levels

Diagnoses and mortality in a population without acute myocardial infarction, but with elevated highsensitive troponin I – a retrospective register-based single center study

2021 ◽  
Vol 20 (1) ◽  
pp. 18-24
Author(s):  
Rasmus Søgaard Hansen ◽  
◽  
Jesper Revsholm ◽  
Daniel Pilsgaard Henriksen ◽  
Lars Christian Lund Lund ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Troponin I ◽  
Inclusion Criteria ◽  
Danish Population ◽  
Medical Observation ◽  
Single Center Study ◽  
One Year ◽  
High Sensitive Troponin ◽  
Center Study

Aim: To explore, which differential diagnoses to consider in individuals with elevated troponins without acute myocardial infarction (AMI), and the mortality for those individuals. Methods: Retrospective, register-based study on a representative sample of the Danish population with the following inclusion criteria: High-sensitive troponin I (hs-TnI) ≥25 ng/L, age ≥18 years, and exclusion of AMI. Results: 3067 individuals without AMI but increased hs-TnI were included. Most frequent discharge diagnoses: Pneumonia (12.8%), Aortic valve disorder (11.3%), Medical observation (10.9%) and Heart failure (8.9%). The 30-days and one-year mortality was 15.8% and 32.0%, respectively. Conclusions: A selected number of alternative diagnoses must be considered in individuals with increased hs-TnI. Due to high mortality it is crucial to carefully evaluate these individuals despite the absence of AMI.

Abstract 2425: Absence of Auto-Antibodies against Cardiac Troponin I Predicts Improvement of Left Ventricular Function after Acute Myocardial Infarction

Circulation ◽  
2008 ◽  
Vol 118 (suppl_18) ◽  
Author(s):  
Florian Leuschner ◽  
Jin Li ◽  
Stefan Göser ◽  
Lars Reinhardt ◽  
Renate Öttl ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Stroke Volume ◽  
Antibody Titer ◽  
Cardiac Troponin ◽  
Troponin I ◽  
Cardiac Troponin I ◽  
Igg Antibody ◽  
Follow Up Study

Application of antibodies against cardiac troponin I (cTnI-Ab) can induce dilation and dysfunction of the heart in mice. Recently, we demonstrated that immunization with cTnI induces inflammation and fibrosis in myocardium of mice. Others have shown that autoanti-bodies to cTnI are present in patients with acute coronary syndrome. But little is known about the clinical relevance of detected cTnI-Ab. First, anti-cTnI and anti-cTnT antibody titers were measured in sera from 272 patients with dilated- (DCM) and 185 with ischemic- (ICM) cardiomyopathy. Secondly, 108 patients with acute myocardial infarction (AMI) were included for a follow-up study. Heart characteristics were determined by magnetic resonance imaging 4 days and 6 –9 months after AMI. Altogether, in 7,0% of patients with DCM and in 9,2% with ICM an anti-cTnI IgG antibody titer ≥1:160 was measured. In contrast, only in 1,7% of patients with DCM and in 0,5% with ICM an anti-cTnT IgG antibody titer ≥1:160 was detected. Ten out of 108 patients included in the follow-up study were tested positive for cTnI-Ab with IgG Ab titers ≥1:160. TnI-Ab negative patients showed a significant increase in LVEF and stroke volume 6 –9 months after AMI. In contrast, there was no significant increase in LVEF and stroke volume in TnI-Ab positive patients. We demonstrate for the first time that the prevalence of cTnI-Abs in patients with AMI has an impact on the improvement of the LVEF over a study period of 6 –9 months.

scholarly journals Pattern of serum cardiac troponin-I in symptomatic acute myocardial infarction patients in national institute of cardiovascular disease in Bangladesh

2014 ◽  
Vol 42 (1) ◽  
pp. 3-6
Author(s):  
SS Shahina ◽  
JU Ahmed ◽  
S Ahmed ◽  
E Shahriar ◽  
MN Uddin ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Cardiovascular Disease ◽  
Acute Myocardial Infarction ◽  
Myocardial Injury ◽  
Troponin I ◽  
Clinical Symptoms ◽  
Cardiac Injury ◽  
Circadian Variation ◽  
Assay Method ◽  
Ctni Level

Troponin I (cTnI) isoform is cardiac muscle specific protein and shown to have several features as a preferred marker of myocardial injury. It rises early in acute myocardial infarction (AMI) and attains levels that are clearly separated from baseline values. It remains elevated for several days providing a long window for detection of cardiac injury. The objective of the study was to evaluate for the profile of cTnI level among symptomatic AMI patients. The study was conducted at National Institute of Cardiovascular Disease, Dhaka, Bangladesh from July 2007 to June 2008 and total 9552 patients with type 1 or type 2 MI were included. Blood Sample was taken within 3 days of symptoms and cTnI was measured by chemiluminescent immunometric assay method. cTnI was considered positive when the value was >1ng/ml and study population was divided as per age, sex and cTnI level. The mean (+ SD) age of all patients was 55(+ 12.8) years and majority was males (82.20%). Seasonal variation showed highest positive cases in winter. In case of circadian variation positive cTnI results were suggestive of morning peak of AMI. Positive results were obtained in 32.3% of Cases. cTnI is now considered as a better indicator of myocardial injury. Further study in depth is necessary to correlate with clinical symptoms and other diagnostic tests to make a complete profile of AMI according to the latest subtypes. DOI: http://dx.doi.org/10.3329/bmj.v42i1.18969 Bangladesh Med J. 2013 Jan; 42 (1): 3-6

scholarly journals Gender-Related Differences of Cardiac Troponin-I Levels in Patients with Acute Myocardial Infarction at Time of Acute Chest Pain

2021 ◽  
pp. 199-205
Author(s):  
Mahir Abdulkadhum Khudhair Alzughaibi ◽  
Ammar Waheeb Obeiad ◽  
Nassar Abdalaema Abdalhadi Mera ◽  
Mohammed Sadeq Hamzah Al-Ruwaiee
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Chest Pain ◽  
Troponin I ◽  
Statistical Significance ◽  
Acute Chest Pain ◽  
Blood Analysis ◽  
P Value ◽  
Cross Sectional ◽  
Time Of Admission

Background: Cardiac Troponins-I (CTNI) are myoregulatory polypeptides that control the actin-myosin interface, considered specific to cardiomyocytes. Age and sex variances in the extent of CTNI levels have arisen a recent debatable emphasis. Existing revisions do not display a reliable clinical power of sex-specific CTNI 99th centiles, which actually might mirror procedural aspects. Nevertheless, from a biochemical viewpoint, the trends of sex-specific CTNI 99th centiles seem sensible for the ruling-in of acute myocardial infarction AMI. Vulnerable females may be missed when applying the male sex-specific threshold. This study aimed to determine whether gender differences in CTNI exist in patients with AMI presented with chest pain. Methodology: The study was a cross-sectional, single-center, included 236-patients with AMI diagnosis by cardiologists at Merjan teaching hospital during the period from April to July 2020 from patients attending the hospital for cardiac consultation complaining of acute chest pain suggestive of AMI. Blood analysis had initiated at the time of admission included serum creatinine, blood urea, R/FBS, WBCs, PCV, and serum CTNI. A p-value below 0.05 specifies statistical significance. All statistical bioanalyses had performed by IBM-SPSS, version-25 for Windows. Results: The mean age of participants was 67.5 years, the men were dominant 76.2%. The incidence of DM and hypertension were significantly high and 24.5% of the patients were current smokers. Biochemical serum analysis revealed mean creatinine, urea, sugar, and STI values were 79.8±4.2 mmol/l, 15.9±1.7 mmol/l, 10.9±0.9 mmol/l, and 7.9±0.6 ng/ml separately. Both hypertension and smoking were significantly (p-0.001) more among males compared to the females, which is not the case for the prevalence of DM. The males were heavier significantly than females (p-0.001). Almost, there was no impact of gender on most of the other study variables other than serum TNI levels, which were significantly higher among the males (p-0.001). Conclusion: In patients with AMI presented with acute chest pain, the routine of CTNI in the diagnosis of AMI is based on the patient's gender. The application of gender-dependent cutoff levels for CTNI analyses appears to be highly suggested.

scholarly journals Identification of Regulatory circRNAs Involved in the Pathogenesis of Acute Myocardial Infarction

2021 ◽  
Vol 11 ◽  
Author(s):  
Cuimei Zhao ◽  
Jingjing Liu ◽  
Wen Ge ◽  
Zhi Li ◽  
Mengwei Lv ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Coronary Arteries ◽  
Expression Profiles ◽  
Expression Patterns ◽  
Differential Expression Analysis ◽  
Functional Characterization ◽  
High Morbidity ◽  
The Impact ◽  
Runx1 Expression

BackgroundAcute myocardial infarction (AMI) has high morbidity and mortality worldwide. However, the pathogenesis of AMI is still unclear, and the impact of circular RNAs (circRNAs) on AMI has rarely been recognized and needs to be explored.Materials and MethodsThe circRNA array was applied to investigate the expression level of circRNAs in the blood samples of coronary arteries of three AMI patients and three normal persons. Principal component analysis (PCA) and unsupervised clustering analysis were performed to reveal the distinguished expression patterns of circRNAs. The miRNA expression profiles of AMI patients were identified from a public dataset from the Gene Expression Omnibus (GEO) database (GSE31568). The miRNA binding sites on the circRNAs were predicted by miRanda. The miRNA enrichment analysis and annotation tool were used to explore the pathways that the dysregulated circRNAs may participate in.ResultsIn total, 142 differentially expressed circRNAs, including 89 upregulated and 53 downregulated in AMI samples, were identified by the differential expression analysis. AMI patients had quite different circRNA expression profiles to those of normal controls. Functional characterization revealed that circRNAs that had the potential to regulate miRNAs were mainly involved in seven pathways, such as the Runt-related transcription factor-1 (RUNX1) expression and activity-related pathway. Specifically, hsa_circRNA_001654, hsa_circRNA_091761, hsa_circRNA_405624, and hsa_circRNA_406698 were predicted to sponge four miRNAs including hsa-miR-491-3p, hsa-miR-646, hsa-miR-603, and hsa-miR-922, thereby regulating RUNX1 expression or activity.ConclusionWe identified dysregulated blood circRNAs in the coronary arteries of AMI patients and predicted that four upregulated circRNAs were involved in the regulation of RUNX1 expression or activity through sponging four miRNAs.

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