SciELO - Scientific Electronic Library Online

vol.113 issue1Serum Sirtuin 1, 3 and 6 Levels in Acute Myocardial Infarction PatientsReadmission of Patients with Acute Coronary Syndrome and Determinants author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Arquivos Brasileiros de Cardiologia

Print version ISSN 0066-782XOn-line version ISSN 1678-4170

Arq. Bras. Cardiol. vol.113 no.1 São Paulo July 2019  Epub Aug 08, 2019 

Short Editorial

Biomarkers in Acute Myocardial Infarction Diagnosis and Prognosis

1Instituto Integrado de Saúde, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS - Brazil

2Faculdade de Medicina de Botucatu - Departamento de Medicina Interna - Universidade Estadual Paulista (UNESP), Botucatu, SP - Brazil

Keywords: Cardiovascular Diseases; Diagnosis; Prognosis; Mortality; Biomarkers; Sirtuins; Myocardial Infarction; Molecular Biology

Biomarkers have become a helpful tool for clinicians to establish acute and chronic diseases diagnosis and prognosis more accurately. The rapid expansion of researches in this field has been stimulated by molecular biology and omics techniques development.1

In cardiovascular disease, the release of the intracellular components into the bloodstream in higher concentrations than usual are related to pathological conditions, such as necrosis, inflammation, hemodynamic stress, and thrombosis, and considered potential biomarkers.2 Although a large number of cardiac biomarkers has been described, only a few of them were incorporated in clinical practice. Their usefulness depends on their specificity and sensitivity for detecting myocardial injury, reproducibility, accuracy, and the discriminatory limits to distinguish between pathologic from physiologic levels.2

Cardiac troponin (cTn) is a biomarker that has been established for diagnosis and that also provides robust prognostic information in acute myocardial infarction (AMI).1 It is still the most recommended biomarker for detecting myocardial injury, especially due to its sensibility and specificity, even though it does not indicate the underlying etiology and pathophysiological mechanism.3 On the Fourth Universal Definition of Myocardial Infarction, myocardial infarction is defined when acute injury with abnormal cardiac biomarkers is detected (a rising and/or falling pattern of cTn values with at least one value above the 99th percentile upper reference limit) in association with evidence of acute myocardial ischaemia.3

Several other biomarkers representing different pathophysiological axes have been considered as a potential tool for diagnosis and risk stratification in AMI patients. These emerging biomarkers, including suppression of tumorigenicity 2 (ST2), galectin-3, copeptin, myeloperoxidase (MPO), high sensitivity C-reactive protein (CRP), pregnancy-associated plasma protein A (PAPP-A), growth-differentiation factor-15 (GDF-15), and others, have been studied individually or using a multimarker strategy.4,5 However, further studies are still required to determine their usefulness for AMI diagnosis and prognosis.

More recently, sirtuins have attracted great interest for their protective roles against inflammation, cancer, cardiovascular disease, vascular aging, and glucose homeostasis changes. Sirtuins were first discovered in the 1970s; their main action is the removal of acetylated groups from histone and non-histone proteins in the presence of nicotinamide adenine dinucleotide (NAD+).6 Members of the sirtuin family are widely distributed throughout nature; this family has seven isoforms in the human body (Sirtuin1-7).7 Among sirtuins, the isoforms 1, 3, and 6 are the best characterized; they exert important effects in the cardiovascular system against atherosclerosis, myocyte hypertrophy, ischemia/reperfusion injury, oxidative stress, inflammation, and endoplasmic reticulum stress.8-10 Therefore, several studies have focused on the modulation of sirtuins with pharmacological and natural dietary compounds.9

In this issue of the Arquivos Brasileiros de Cardiologia, Kızıltunç et al.11 published an interesting study in which they hypothesized serum sirtuin 1, 3 and 6 levels as possible biomarkers of myocardial infarct size and prognosis in AMI patients. Temporal levels of serum sirtuin 1, 3 and 6 and their association with AMI prognostic markers were examined. Patients with AMI (n = 40) and patients with normal coronary arteries (n = 40) were included and evaluated regarding left ventricular ejection fraction (LVEF), serum proBNP, CRP, and serum levels of sirtuin1, sirtuin 3, and sirtuin 6. Peak troponin T, GRACE score, and first day/second-day sirtuin levels were recorded for AMI patients. The authors found that sirtuin 1, 3 and 6 levels in AMI were similar to those in normal coronary patients, and no temporal change in sirtuins levels was observed during infarction course. Furthermore, there was no significant correlation between sirtuins levels and traditional markers of infarct size such as proBNP, peak troponin T, or LVEF. However, baseline sirtuin 1 and 6 levels were positively correlated with reperfusion duration, and baseline sirtuin 3 was negatively correlated with GRACE score. As pointed out by the authors, the negative correlation between sirtuin 3 and GRACE score suggests a possible role of sirtuin 3 for risk assessment in AMI patients.

In this study, it should be pointed out that 95% of AMI patients were classified as Killip I functional class. Therefore, although the authors have observed similar sirtuins levels in AMI and normal coronary patients, further investigation is needed to clarify whether serum sirtuin levels modify in AMI patients with worse cardiac function.12

In the literature, experimental artery occlusion-mediated infarction was combined with decreased sirtuin 3 expression in rats.13 Furthermore, sirtuin 3 knockout induced coronary microvascular dysfunction and cardiac remodeling impairment, while sirtuin 3 upregulation improved cardiac function in post-infarction mice.8 On the other hand, sirtuin 3 deficiency did not change infarction size or cardiac function.14 Therefore, additional studies are needed to clarify the role of sirtuins in the pathophysiology of myocardial infarction.

Short Editorial related to the article: Serum Sirtuin 1, 3 and 6 Levels in Acute Myocardial Infarction Patients


Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), process number 310876/2018-4 and 153424/2018-4).


1 Jaffe AS, Babuin L, Apple FS. Biomarkers in acute cardiac disease: The present and the future. J Am Coll Cardiol. 2006;48(1):1-11. [ Links ]

2 Thygesen K, Mair J, Katus H, Plebani M, Venge P, Collinson P, et al. Study Group on Biomarkers in Cardiology of the ESC Working Group on Acute Cardiac Care. Recommendations for the use of cardiac troponin measurement in acute cardiac care. Eur Heart J. 2010;31(18):2197-204. [ Links ]

3 Thygesen K, Alpert JS, Jaffe AS, Chaitman BR, Bax JJ, Morrow DA, et al. ESC Scientific Document Group. Fourth universal definition of myocardial infarction (2018). Eur Heart J. 2019;40(3):237-69. [ Links ]

4 O'Donoghue ML, Morrow DA, Cannon CP, Jarolim P, Desai NR, Sherwood MW, et al. Multimarker risk stratification in patients with acute myocardial infarction. J Am Heart Assoc. 2016;5(5):e002586. [ Links ]

5 Wang YP, Wang JH, Wang XL, Liu JY, Jiang FY, Huang XL, et al. Roles of ST2, IL-33 and BNP in predicting major adverse cardiovascular events in acute myocardial infarction after percutaneous coronary intervention. J Cell Mol Med. 2017;21(11):2677-84. [ Links ]

6 Tang X, Chen XF, Wang NY, Wang XM, Liang ST, Zheng W, et al. SIRT2 acts as a cardioprotective deacetylase in pathological cardiac hypertrophy. Circulation. 2017;136(21):2051-67. [ Links ]

7 Wang Y, He J, Liao M, Hu M, Li W, Ouyang H, et al. An overview of sirtuins as potential therapeutic target: Structure, function and modulators. Eur J Med Chem. 2019;161:48-77. [ Links ]

8 Mihanfar A, Nejabati HR, Fattahi A, Latifi Z, Faridvand Y, Pezeshkian M, et al. SIRT3-mediated cardiac remodeling/repair following myocardial infarction. Biomed Pharmacother. 2018;108:367-73. [ Links ]

9 D'Onofrio N, Servillo L, Balestrieri ML. SIRT1 and SIRT6 signaling pathways in cardiovascular disease protection. Antioxid Redox Signal. 2018;28(8):711-32. [ Links ]

10 Zhang X, Ji R, Liao X, Castillero E, Kennel PJ, Brunjes DL, et al. MicroRNA-195 regulates metabolism in failing myocardium via alterations in sirtuin 3 expression and mitochondrial protein acetylation. Circulation. 2018;137(19):2052-67. [ Links ]

11 Kiziltunç E, OzKan C. Serum Sirtuin 1,3 and 6 levels in acute myocardial infarction. Arq Bras Cardiol. 2019; 113(1):33-39. [ Links ]

12 Wu H, Cao G, Wang Y, Tian H, Du R. Increased serum CA125 and brain-derived neurotrophic factor (BDNF) levels on acute myocardial infarction: A predictor for acute heart failure. Med Sci Monit. 2019;25:913-9. [ Links ]

13 Klishadi MS, Zarei F, Hejazian SH, Moradi A, Hemati M, Safari F. Losartan protects the heart against ischemia reperfusion injury: Sirtuin3 involvement. J Pharm Pharm Sci. 2015;18(1):112-23. [ Links ]

14 Koentges C, Pfeil K, Meyer-Steenbuck M, Lother A, Hoffmann MM, Odening KE, et al. Preserved recovery of cardiac function following ischemia-reperfusion in mice lacking SIRT3. Can J Physiol Pharmacol. 2016;94(1):72-80. [ Links ]

Mailing Address: Marina P. Okoshi • Departamento de Clinica Medica, Faculdade de Medicina de Botucatu, UNESP. Rubião Junior, S/N. Postal Code 18.618-687 Botucatu, SP - Brazil E-mail:

Creative Commons License This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited