Biomarkers in critical care have increased manyfold. However, only a few of them are used in clinical practice. Biomarkers are considered as tools that help to make clinical decisions easier. Usage of biomarkers aids clinicians in the diagnosis and treatment of cardiac conditions like myocardial infarction (MI), acute decompensated heart failure (ADHF), and several malignant conditions. In conditions such as sepsis and acute respiratory distress syndrome (ARDS), there are no clear guidelines on the use of biomarkers currently. Hence, biomarkers have been slow to gain relevance in intensive care medical practice. The purpose of this literature review is to discuss few biomarkers currently available that can potentially help for decision-making and management of critically ill patients. Literature search from 2010 to 2023 for articles published in medical databases (PubMed, CrossRef, Google Scholar, Cochrane database) on biomarkers in critical care was performed, and clinically important markers were chosen for review. There is a renewed interest in the field of biomarkers relevant to intensive care unit (ICU). The most studied biomarker is procalcitonin; its usefulness in sepsis and de-escalation of antibiotics is emphasized. Newer biomarkers are aimed to help in assessment and management of critical patients with left and right heart failure, systemic and pulmonary congestion, and renal failure. There are biomarkers that help in ARDS and ventilator management. Several other biomarkers are still in the pipeline. Use of biomarkers in critical care practice is in the uptrend. In future, along with clinical assessment, use of biomarkers will be helpful for managing critically ill patients and is likely to be incorporated into prognostic scoring.
NIH Biomarker Working Group. BEST (Biomarkers, EndpointS, and other Tools) resource. Silver Spring (MD): Food and Drug Administration (US); Bethesda (MD): National Institute of Health (US); 2016. www.ncbi.nlm.nih.gov/books/NBK326791
Moons KGM. Criteria for scientific evaluation of novel markers: a perspective. Clin Chem 2010;56:537–541. DOI: 10.1373/clinchem.2009.134155
Singer M, Deutschman CS, Seymour CW, et al. The third international consensus definitions for sepsis and septic shock (sepsis-3). JAMA 2016;315:801–810. DOI: 10.1001/jama.2016.0287
Bakker J, Postelnicu R, Mukherjee V. Lactate: where are we now? Crit Care Clin 2020;36:115–124. DOI: 10.1016/j.ccc.2019.08.009
Chauin A. The main causes and mechanisms of increase in cardiac troponin concentrations other than acute myocardial infarction (part 1): physical exertion, inflammatory heart disease, pulmonary embolism, renal failure, sepsis. Vasc Health Risk Manag 2021;17:601–617. DOI: 10.2147/VHRM.S327661
Thygesen K, Alpert JS, Jaffe AS, et al. Fourth universal definition of myocardial infarction (2018). J Am Coll Cardiol 2018;72:2231–2264. DOI: 10.1016/j.gheart.2018.08.004
Kakihana Y, Ito T, Nakahara M, et al. Sepsis-induced myocardial dysfunction: pathophysiology and management. J Intensive Care 2016;4:22. DOI: 10.1186/s40560-016-0148-1
Mallick A, Januzzi JL. Biomarkers in acute heart failure. Rev Espanola Cardiol Engl Ed 2015;68:514–525. DOI: 10.1016/j.rec.2015.02.009
L'Heureux M, Sternberg M, Brath L, et al. Sepsis-induced cardiomyopathy: a comprehensive review. Curr Cardiol Rep 2020;22:35. DOI: 10.1007/s11886-020-01277-2
Koratala A, Kazory A. Natriuretic peptides as biomarkers for congestive states: the cardiorenal divergence. Dis Markers 2017;2017:1454986. DOI: 10.1155/2017/1454986
Carpenter CR, Keim SM, Worster A, et al. Brain natriuretic peptide in the evaluation of emergency department dyspnea: is there a role? J Emerg Med 2012;42:197–205. DOI: 10.1016/j.jemermed.2011.07.014
Hinson JP, Kapas S, Smith DM. Adrenomedullin, a multifunctional regulatory peptide. Endocr Rev 2000;21:138–167. DOI: 10.1210/edrv.21.2.0396
Struck J, Tao C, Morgenthaler NG, et al. Identification of an adrenomedullin precursor fragment in plasma of sepsis patients. Peptides 2004;25:1369–1372. DOI: 10.1016/j.peptides.2004.06.019
Bernal-Morell E, García-Villalba E, Vera MDC, et al. Usefulness of midregional pro-adrenomedullin as a marker of organ damage and predictor of mortality in patients with sepsis. J Infect 2018;76:249–257. DOI: 10.1016/j.jinf.2017.12.003
Andrés C, Andaluz-Ojeda D, Cicuendez R, et al. MR-proADM to detect specific types of organ failure in infection. Eur J Clin Investig 2020;50:e13246. DOI: 10.1111/eci.13246
Bassetti M, Russo A, Righi E, et al. Role of procalcitonin in bacteremic patients and its potential use in predicting infection etiology. Expert Rev Anti Infect Ther 2019;17;99–105. DOI: 10.1080/14787210.2019.1562335
Caironi P, Latini R, Struck J, et al. Circulating biologically active adrenomedullin (bio-ADM) predicts hemodynamic support requirement and mortality during sepsis. Chest 2017;152:312–320. DOI: 10.1016/j.chest.2017.03.035
Laterre PF, Pickkers P, Marx G, et al. Safety and tolerability of non-neutralizing adrenomedullin antibody adrecizumab (HAM8101) in septic shock patients: the AdrenOSS-2 phase 2a biomarker-guided trial. Intensive Care Med 2021;47:1284–1294. DOI: 10.1007/s00134-021-06537-5
Egerstedt A, Czuba T, Bronton K, et al. Bioactive adrenomedullin for assessment of venous congestion in heart failure. ESC Heart Fail 2022;9:3543–3555. DOI: 10.1002/ehf2.14018
Blet A, Deniau B, Santos K, et al. Monitoring circulating dipeptidyl peptidase 3 (DPP3) predicts improvement of organ failure and survival in sepsis: a prospective observational multinational study. Crit Care 2021;25:61. DOI: 10.1186/s13054-021-03471-2
Takagi K, Blet A, Levy B, et al. Circulating dipeptidyl peptidase 3 and alteration in haemodynamics in cardiogenic shock: results from the OptimaCC trial. Eur J Heart Fail 2020;22:279–286. DOI: 10.1002/ejhf.1600
Agrawal A, Matthay MA, Kangelaris KN, et al. Plasma angiopoietin-2 predicts the onset of acute lung injury in critically ill patients. Am J Respir Crit Care Med 2013;187:736–742. DOI: 10.1164/rccm.201208-1460OC
Calfee CS, Ware LB, Eisner MD, et al. Plasma receptor for advanced glycation end products and clinical outcomes in acute lung injury. Thorax 2008;63:1083–1089. DOI: 10.1136/thx.2008.095588
Shyamsundar M, McAuley DF, Ingram RJ, et al. Keratinocyte growth factor promotes epithelial survival and resolution in a human model of lung injury. Am J Respir Crit Care Med 2014;189:1520–1529. DOI: 10.1164/rccm.201310-1892OC
Darwish I, Liles WC. Emerging therapeutic strategies to prevent infection-related microvascular endothelial activation and dysfunction. Virulence 2013;4:572–582. DOI: 10.4161/viru.25740
Parsons PE, Eisner MD, Thompson BT, et al. Lower tidal volume ventilation and plasma cytokine markers of inflammation in patients with acute lung injury. Crit Care Med 2005;33:1–6. DOI: 10.1097/01.ccm.0000149854.61192.dc
Mascia L, Pasero D, Slutsky AS, et al. Effect of a lung protective strategy for organ donors on eligibility and availability of lungs for transplantation: a randomized controlled trial. JAMA 2010;304:2620–2627. DOI: 10.1001/jama.2010.1796
Jabaudon M, Hamroun N, Roszyk L, et al. Effects of a recruitment maneuver on plasma levels of soluble RAGE in patients with diffuse acute respiratory distress syndrome: a prospective randomized crossover study. Intensive Care Med 2015;41:846–855. DOI: 10.1007/s00134-015-3726-0
Mekontso-Dessap A, de Prost N, Girou E, et al. B-type natriuretic peptide and weaning from mechanical ventilation. Intensive Care Med 2006;32:1529–1536. DOI: 10.1007/s00134-006-0339-7
Grasso S, Leone A, De Michele M, et al. Use of N-terminal pro-brain natriuretic peptide to detect acute cardiac dysfunction during weaning failure in difficult-to-wean patients with chronic obstructive pulmonary disease. Crit Care Med 2007;35:96–105. DOI: 10.1097/01.CCM.0000250391.89780.64
Bellomo R, Ronco C, Mehta RL, et al. Acute kidney injury in the ICU: from injury to recovery: reports from the 5th Paris International Conference. Ann Intensive Care 2017;7:49. DOI: 10.1186/s13613-017-0260-y
Khwaja A. KDIGO clinical practice guidelines for acute kidney injury. Nephron Clin Pract 2012;120:c179–c184. DOI: 10.1159/000339789
Khorashadi M, Beunders R, Pickkers P, et al. Proenkephalin: a new biomarker for glomerular filtration rate and acute kidney injury. Nephron 2020;144:655–661. DOI: 10.1159/000509352
Beunders R, van Groenendael R, Leijte GP, et al. Proenkephalin compared to conventional methods to assess kidney function in critically ill sepsis patients. Shock 2020;54:308–314. DOI: 10.1097/SHK.0000000000001510
Caironi P, Latini R, Struck J, et al. Circulating proenkephalin, acute kidney injury, and its improvement in patients with severe sepsis or shock. Clin Chem 2018;64:1361–1369. DOI: 10.1373/clinchem.2018.288068
Di Leo L, Nalesso F, Garzotto F, et al. Predicting acute kidney injury in intensive care unit patients: the role of tissue inhibitor of metalloproteinases-2 and insulin-like growth factor-binding protein-7 biomarkers. Blood Purif 2018;45:270–277. DOI: 10.1159/000485591
Devarajan P. Neutrophil gelatinase-associated lipocalin—an emerging troponin for kidney injury. Nephrol Dial Transplant 2008;23:3737–3743. DOI: 10.1093/ndt/gfn531
De Geus HRH, Bakker J, Lesaffre EMEH, et al. Neutrophil gelatinase-associated lipocalin at ICU admission predicts for acute kidney injury in adult patients. Am J Respir Crit Care Med 2011;183:907–914. DOI: 10.1164/rccm.200908-1214OC
Clerico A, Galli C, Fortunato A, et al. Neutrophil gelatinase-associated lipocalin (NGAL) as biomarker of acute kidney injury: a review of the laboratory characteristics and clinical evidences. Clin Chem Lab Med 2012;50:9. DOI: 10.1515/cclm-2011-0814
Saito K, Sugawara H, Ichihara K, et al. Prediction of 72-hour mortality in patients with extremely high serum C-reactive protein levels using a novel weighted average of risk scores. PLoS One 2021;16:e0246259. DOI: 10.1371/journal.pone.0246259
Farkas JD. The complete blood count to diagnose septic shock. J Thorac Dis 2020;12:S16–S21. DOI: 10.21037/jtd.2019.12.63
Curbelo J, Luquero Bueno S, Galván-Román JM, et al. Inflammation biomarkers in blood as mortality predictors in community-acquired pneumonia admitted patients: importance of comparison with neutrophil count percentage or neutrophil-lymphocyte ratio. PLoS One 2017;12(3):e0173947. DOI: 10.1371/journal.pone.0173947
Zhang HJ, Qi GQ, Gu X, et al. Lymphocyte blood levels that remain low can predict the death of patients with COVID-19. Medicine 2021;100:e26503. DOI: 10.1097/MD.0000000000026503
Xu HG, Tian M, Pan SY. Clinical utility of procalcitonin and its association with pathogenic microorganisms. Crit Rev Clin Lab Sci 2022;59:93–111. DOI: 10.1080/10408363.2021.1988047
Van Nieuwkoop C, Bonten TN, van't Wout JW, et al. Procalcitonin reflects bacteremia and bacterial load in urosepsis syndrome: a prospective observational study. Crit Care 2010;14:R206. DOI: 10.1186/cc9328
Azzini AM, Dorizzi RM, Sette P, et al. A 2020 review on the role of procalcitonin in different clinical settings: an update conducted with the tools of the Evidence Based Laboratory Medicine. Ann Transl Med 2020;8:610. DOI: 10.21037/atm-20-1855
Heffernan AJ, Denny KJ. Host diagnostic biomarkers of infection in the ICU: where are we and where are we going? Curr Infect Dis Rep 2021;23:4. DOI: 10.1007/s11908-021-00747-0
Hennigan S, Kavanaugh A. Interleukin-6 inhibitors in the treatment of rheumatoid arthritis. Ther Clin Risk Manag 2008;4:767–775. DOI: 10.2147/tcrm.s3470
Jawa RS, Anillo S, Huntoon K, et al. Interleukin-6 in surgery, trauma, and critical care part II: clinical implications. J Intensive Care Med 2011;26:73–87. DOI: 10.1177/0885066610384188
Molano Franco D, Arevalo-Rodriguez I, Roqué I, et al. Plasma interleukin-6 concentration for the diagnosis of sepsis in critically ill adults. Cochrane Database Syst Rev 2019, 4(4), CD011811. DOI: 10.1002/14651858.CD011811.pub2
Savva A, Raftogiannis M, Baziaka F, et al. Soluble urokinase plasminogen activator receptor (suPAR) for assessment of disease severity in ventilator-associated pneumonia and sepsis. J Infect 2011;63:344–350. DOI: 10.1016/j.jinf.2011.07.016
Huang Q, Xiong H, Yan P, et al. The diagnostic and prognostic value of suPAR in patients with sepsis: a systematic review and meta-analysis. Shock 2020;53:416–425. DOI: 10.1097/SHK.0000000000001434
Lee S, Song J, Park DW, et al. Diagnostic and prognostic value of presepsin and procalcitonin in non-infectious organ failure, sepsis, and septic shock: a prospective observational study according to the sepsis-3 definitions. BMC Infect Dis 2022;22:8. DOI: 10.1186/s12879-021-07012-8
Reding T, Palmiere C, Pazhepurackel C, et al. The pancreas responds to remote damage and systemic stress by secretion of the pancreatic secretory proteins PSP/regI and PAP/regIII. Oncotarget 2017;8:30162–30174. DOI: 10.18632/oncotarget.16282
Prazak J, Irincheeva I, Llewelyn MJ, et al. Accuracy of pancreatic stone protein for the diagnosis of infection in hospitalized adults: A systematic review and individual patient level meta-analysis. Crit Care 2021;25:182. DOI: 10.1186/s13054-021-03609-2