Brazilian Journal of Anesthesiology
Brazilian Journal of Anesthesiology
Experimental Trials

Dose-related effects of dexmedetomidine on sepsis-initiated lung injury in rats

Efeitos dose-dependentes de dexmedetomidina na lesão pulmonar induzida pela sepse em ratos

Gülsüm Karabulut, Nurdan Bedirli, Nalan Akyürek, Emin Ümit Bagrıacık

Downloads: 1
Views: 545


Sepsis is one of the leading causes of death in intensive care units. Dexmedetomidine is a sedative agent with anti-inflammatory properties. This study is designed to differentiate the impact of two different doses of dexmedetomidine on lung injury induced by sepsis.

Adult male Wistar rats were randomly divided into four groups: sham (n = 6), control (n = 12), 5DEX (n = 12), and 10DEX (n = 12). Cecal ligation puncture (CLP) was applied for sepsis initiation. The 5DEX group received 5 μ and the 10DEX group received 10 μ dexmedetomidine intravenous infusions for a 1-hour period. Six hours after CLP, tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), and intercellular adhesion molecule-1 (ICAM-1) levels were analyzed in blood samples. Twenty-four hours after CLP, lung samples from the remaining rats were collected for the measurement of myeloperoxidase (MPO) activity, histological examination, and TdT- (terminal deoxynucleotidyl transferase) mediated fluorescent-dUTP labeling staining for apoptosis detection.

Serum cytokine release, MPO activity, and apoptosis in the lung were significantly increased in the CLP group compared with the sham and dexmedetomidine groups (p < 0.05). TNF-α, ICAM-1, and MPO were significantly lower in the 10DEX group compared with both 5DEX and control groups, while IL-1β, total injury score, and apoptotic cell count had significantly lower values in both 10DEX and 5DEX groups compared with the control group (p < 0.05).

Dexmedetomidine administration played a protective role against CLP-induced lung injury. High-dose dexmedetomidine was needed for suppressing the leukocyte-mediated lung injury and apoptosis of lung tissue.


Sepsis,  Lung injury,  Dexmedetomidine


1 M. Singer, C.S. Deutschman, C.W. Seymour, et al. The Third International Consensus Definitions for Sepsis and Septic Shock (Sepsis-3) JAMA, 315 (2016), pp. 801-810

2 G.D. Rubenfeld, E. Caldwell, E. Peabody, et al. Incidence and outcomes of acute lung injury N Engl J Med, 353 (2005), pp. 1685-1693

3 L.B. Ware, M.A. Matthay The acute respiratory distress syndrome N Engl J Med, 342 (2000), pp. 1334-1349

4 X.D. Zhang, J.F. Hou, X.J. Qin, et al. Pentoxifylline inhibits intercellular adhesion molecule-1 (ICAM-1) and lung injury in experimental phosgene-exposure rats Inhal Toxicol, 22 (2010), pp. 889-895

5 Y. Gong, H. Lan, Z. Yu, et al. Blockage of glycolysis by targeting PFKFB3 alleviates sepsis-related acute lung injury via suppressing inflammation and apoptosis of alveolar epithelial cells Biochem Biophys Res Commun, 491 (2017), pp. 522-529

6 Y. Chen, L. Wang, Q. Kang, et al. Heat Shock Protein A12B Protects Vascular Endothelial Cells Against Sepsis-Induced Acute Lung Injury in Mice Cell Physiol Biochem, 42 (2017), pp. 156-168

7 J. Hill, T. Lindsay, C.R. Valeri, et al. A CD18 antibody prevents lung injury but not hypotension after intestinal ischemia-reperfusion J Appl Physiol, 74 (1993), pp. 659-664

8 B.C. Marcus, K.L. Hynes, B.L. Gewertz Loss of endothelial barrier function requires neutrophil adhesion Surgery, 122 (1997), pp. 420-427

9 E. Abraham Neutrophils and acute lung injury Crit Care Med, 31 (2003), pp. S195-9

10 X. Ma, D. Xu, Y. Ai, et al. Fas inhibition attenuates lipopolysaccharide-induced apoptosis and cytokine release of rat type II alveolar epithelial cells Mol Biol Rep, 37 (2010), pp. 3051-3056

11 C.Y. Chuang, T.L. Chen, Y.G. Cherng, et al. Lipopolysaccharide induces apoptotic insults to human alveolar epithelial A549 cells through reactive oxygen species-mediated activation of an intrinsic mitochondrion-dependent pathway Arch Toxicol, 85 (2011), pp. 209-218

12 Y.W. Hsu, L.I. Cortinez, K.M. Robertson, et al. Dexmedetomidine pharmacodynamics: part I: crossover comparison of the respiratory effects of dexmedetomidine and remifentanil in healthy volunteers Anesthesiology, 101 (2004), pp. 1066-1076

13 Y. Zhang, K. Ran, S.B. Zhang, et al. Dexmedetomidine may upregulate the expression of caveolin-1 in lung tissues of rats with sepsis and improve the short-term outcome Mol Med Rep, 15 (2017), pp. 635-642

14 P.P. Pandharipande, R.D. Sanders, T.D. Girard, et al. Effect of dexmedetomidine versus lorazepam on outcome in patients with sepsis: an a priori-designed analysis of the MENDS randomized controlled trial Crit Care, 14 (2010), p. R38

15 L.F. Poli-de-Figueiredo, A.G. Garrido, N. Nakagawa, et al. Experimental models of sepsis and their clinical relevance Shock, 30 (2008), pp. 53-59

16 S. Ebong, D. Call, J. Nemzek, et al. Immunopathologic alterations in murine models of sepsis of increasing severity Infect Immun, 67 (1999), pp. 6603-6610

17 D. Torre, G. Minoja, D. Maraggia, et al. Effect of recombinant IL-1 beta and recombinant gamma interferon on septic acute lung injury in mice Chest, 105 (1994), pp. 1241-1245

18 Y. Wu, Y. Liu, H. Huang, et al. Dexmedetomidine inhibits inflammatory reaction in lung tissues of septic rats by suppressing TLR4/NF-kappaB pathway Mediators Inflamm, 2013 (2013), Article 562154

19 C. Ma, L. Zhu, J. Wang, et al. Anti-inflammatory effects of water extract of Taraxacum mongolicum hand.-Mazz on lipopolysaccharide-induced inflammation in acute lung injury by suppressing PI3K/Akt/mTOR signaling pathway J Ethnopharmacol, 168 (2015), pp. 349-355

20 X. Wang, B. Zhao, X. Li Dexmedetomidine attenuates isoflurane-induced cognitive impairment through antioxidant, anti-inflammatory and anti-apoptosis in aging rat Int J Clin Exp Med, 8 (2015), pp. 17281-17288

21 Z. Liu, Y. Wang, Y. Wang, et al. Dexmedetomidine attenuates inflammatory reaction in the lung tissues of septic mice by activating cholinergic anti-inflammatory pathway Int Immunopharmacol, 35 (2016), pp. 210-216

22 Y. Ma, X.Y. Yu, Y. Wang Dose-related effects of dexmedetomidine on immunomodulation and mortality to septic shock in rats World J Emerg Med, 9 (2018), pp. 56-63

23 O.V. Hein, K. Misterek, J.P. Tessmann, et al. Time course of endothelial damage in septic shock: prediction of outcome Crit Care, 9 (2005), p. R323

24 W. Jing, M. Chunhua, W. Shumin Effects of acteoside on lipopolysaccharide-induced inflammation in acute lung injury via regulation of NF-kappaB pathway in vivo and in vitro Toxicol Appl Pharmacol, 285 (2015), pp. 128-135

25 T. Chen, Y. Mou, J. Tan, et al. The protective effect of CDDO-Me on lipopolysaccharide-induced acute lung injury in mice Int Immunopharmacol, 25 (2015), pp. 55-64

26 T. Chen, R. Wang, W. Jiang, et al. Protective Effect of Astragaloside IV Against Paraquat-Induced Lung Injury in Mice by Suppressing Rho Signaling Inflammation, 39 (2016), pp. 483-492

27 X. Huang, Y. Liu, Y. Lu, et al. Anti-inflammatory effects of eugenol on lipopolysaccharide-induced inflammatory reaction in acute lung injury via regulating inflammation and redox status Int Immunopharmacol, 26 (2015), pp. 265-271

28 X. Zhou, Q. Dai, X. Huang Neutrophils in acute lung injury Front Biosci, 17 (2012), pp. 2278-2283

29 A.J. McCabe, M. Dowhy, B.A. Holm, et al. Myeloperoxidase activity as a lung injury marker in the lamb model of congenital diaphragmatic hernia J Pediatr Surg, 36 (2001), pp. 334-337

30 R.H. Bardales, S.S. Xie, R.F. Schaefer, et al. Apoptosis is a major pathway responsible for the resolution of type II pneumocytes in acute lung injury Am J Pathol, 149 (1996), pp. 845-852

6083057ca953957c99176942 rba Articles
Links & Downloads

Braz J Anesthesiol

Share this page
Page Sections