Next Article in Journal
Clinical Effectiveness of a Combination of Black Elder Berries, Violet Herb, and Calendula Flowers in Chronic Obstructive Pulmonary Disease: The Results of a Double-Blinded Placebo-Controlled Study
Previous Article in Journal
Overexpression of T-bet, GATA-3 and TGF-ß Induces IFN-γ, IL-4/13A, and IL-17A Expression in Atlantic Salmon
 
 
Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
Journals
Biology
Volume 9
Issue 4
10.3390/biology9040081
biology-logo
Submit to this Journal Review for this Journal Propose a Special Issue
► Article Menu

Article Menu

share Share announcement Help format_quote Cite question_answer Discuss in SciProfiles thumb_up
...
Endorse textsms
...
Comment
first_page
settings
Order Article Reprints
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
Review

Evaluation of Inflammation Caused by Cardiopulmonary Bypass in a Small Animal Model

by
Yutaka Fujii
Department of Clinical Engineering and Medical Technology, Niigata University of Health and Welfare, Niigata 950-3198, Japan
Biology 2020, 9(4), 81; https://doi.org/10.3390/biology9040081
Submission received: 17 March 2020 / Revised: 16 April 2020 / Accepted: 17 April 2020 / Published: 20 April 2020
(This article belongs to the Section Medical Biology)
Browse Figures
Versions Notes

Abstract

:
Extracorporeal circulation (ECC) methods are being increasingly used for mechanical support of respiratory and cardio-circulatory failure. Especially, cardiopulmonary bypass (CPB) during cardiovascular surgery, sustenance of the patient’s life by providing an appropriate blood flow and oxygen supply to principal organs. On the other hand, systemic inflammatory responses in patients undergoing cardiovascular surgery supported by CPB contribute significantly to CPB-associated mortality and morbidity. Our previous research showed that CPB causes a systemic inflammatory response and organ damage in a small animal CPB model. We have been studying the effects of hyperoxia and blood plasma substitute on CPB. In this review, we present a study focusing on the systemic inflammatory response during CPB, along with our findings.

1. Introduction

Extracorporeal circulation (ECC) methods are being increasingly used for mechanical support of respiratory and cardio-circulatory failure. Especially, cardiopulmonary bypass (CPB) during cardiovascular surgery, sustenance of the patient’s life by providing an appropriate blood flow and oxygen supply to principal organs. [1]. Until the 1950s, cardiovascular surgery had a very high mortality and morbidity rate. This situation changed due to the development of the CPB system by Dr. Gibbon [2] and body surface cooling for hypothermia by Dr. Gordon [3]. These inventions established modern cardiovascular surgery.
However, it has been known that CPB initiates an inflammatory reaction cascade. Cardiovascular surgery with CPB is often associated with a systemic inflammatory response syndrome, significantly affecting the postoperative mortality and morbidity [1,4,5]. The inflammatory response caused by CPB is known to especially affect humans [6,7].
There are several factors that appear to be cause for the systemic inflammatory reaction, such as contact of blood with the CPB device’s surface, surgical operation trauma, endotoxemia, blood loss, and ischemic reperfusion injury [8]. Accordingly, activation of the complement and immune system, leucocytes, and endothelial cells occurs, which in turn is responsible for the release of multiple pro-inflammatory cytokines [9]. The increase in cytokines, as in interleukins (IL), tumor necrosis factor (TNF), kallikrein, and bradykinin [10], exacerbates the inflammatory response during cardiovascular surgery with CPB [11]. Inflammation during extracorporeal circulation causes systemic inflammatory response syndrome and induces serious complications [12,13]. Kidney injury occurs especially frequently, and it is closely related to inflammation during cardiopulmonary bypass [14,15,16]. In fact, looking at clinical data, acute kidney injury (AKI) occurs in 5% of admitted patients [17] and in 5–30% of patients undergoing cardiovascular surgery, who have a high mortality and morbidity rate [17,18].
Moreover, inflammation and arrhythmia after cardiac surgery are also highly related. Myocardial reperfusion after aortic cross unclamping generates enormous stress and might activate leukocytes. Patients who have higher postoperative leukocyte counts are significantly more likely to develop postoperative atrial fibrillation [19,20,21,22], and patients developing postoperative atrial fibrillation tend to have a greater degree of monocyte-macrophage lineage activation, as reflected by high expression of CD11b [23].
In addition, cardiac surgery with CPB results in generation of active oxygen species (oxidative stress) and coagulopathy. Eventually, these phenomena can cause failure of multiple organs and catastrophic complication.
CPB causes a variety of catastrophic complications, and leukocyte activation, especially neutrophils and monocytes, results in worse outcomes for patients undergoing cardiac surgery with CPB.
Our recent report showed that CPB leads to a cytokine release and major organ damage in a rat CPB model [24,25,26,27,28]. In this review, we will introduce our study focusing on the inflammatory response in CPB. Figure 1 summarizes the inflammatory response in CPB.

2. Evaluation of Inflammation Caused by Cardiopulmonary Bypass in a Small Animal Model

2.1. Our Rat Cardiopulmonary Bypass Model

Cardiovascular surgery with CPB is often accompanied by a systemic inflammatory response, significantly affecting postoperative mortality and morbidity [4]. Further research is needed to elucidation of the pathological physiology during CPB. On the other hand, difficulties in clinical study and large animal experiments have made its elucidation difficult. In this situation, it is desirable to have a small animal CPB model [24,25,26,27,28], which enables continue experiments, to research the mechanism of vital reaction during CPB.
Male Sprague-Dawley rats (400–450 g), 14–16 weeks old, were used. After the animals were anesthetized with 5.0% isoflurane mixed oxygen enriched air inhalation with a vaporizer, they were placed in the supine position, and a rectal temperature probe was then inserted. Following orotracheal intubation using a 14G catheter (Terumo Corp, Tokyo, Japan), the animals were mechanically ventilated under 40% of oxygen fraction with a Model 687 respirator (Harvard Apparatus Ltd., Edenbridge, Kent, UK) providing volume-controlled ventilation at a frequency of 70/min, with tidal volume of 8–10 mL/kg body weight. Isoflurane 2.0–2.5% was used to maintain anesthesia, and the rectal temperature was kept at 35–36 °C. The right femoral artery was cannulated with SP-31 polyethylene tubing (Natsume Seisakusho Co. Ltd., Tokyo, Japan) for arterial blood pressure monitoring using a Power-Lab system (Model ML870, AD Instruments Japan Inc, Nagoya, Japan). SP-55 polyethylene tubing (Natsume Seisakusho Co. Ltd.) was used to cannulate the left common carotid artery as the arterial return cannula for the CPB system, and heparin sodium (500 IU/kg) was given through this cannula. A 16G cannula (Togo-medkit Co. Ltd., Tokyo, Japan) was passed through the right internal jugular vein advanced into the right atrium as the conduit for venous uptake. The CPB system consisted of a roller pump (MP-3, Tokyo Rikakikai Co., Ltd., Tokyo, Japan) a miniature membrane oxygenator (Senko Medical Instrument Mfg. Co., Ltd., Tokyo, Japan), and polyvinyl chloride tubing line (Senko Medical Instrument Mfg. Co., Ltd.). CPB circuit was primed by 3 mL of sodium bicarbonate, 3 mL of mannitol, 8 mL of Ringer’s solution, and 1 mL (1000 IU) of heparin. Animals in which the hemoglobin level declined to less than 7 g/dl at any point were excluded from the study. Figure 2a,b shows the rat CPB model.

2.2. Hyperoxia Promotes the Inflammatory Response during Cardiopulmonary Bypass

In a previous study has shown that, among patients admitted to intensive care units following resuscitation from cardiac arrest, the normoxia control group had significantly lower in-hospital mortality than the hyperoxia (arterial pressure of oxygen (PaO2) of 300 mm Hg or greater) control group [29]. A recent study showed that hyper oxygen condition induces oxidative cell damage by promoting the formation of reactive oxygen species (ROS) [30] and the inflammatory cytokines expression [31]. However, PaO2 is controlled at high levels during CPB in clinical sites [31]. We hypothesized that hyperoxia aggravates the systemic inflammation and causes organ damage during CPB. We considered that appropriate normoxia control would lead to a reduction of inflammatory cytokine levels, providing protective effects against organ damage during CPB. To test our speculation, the effects of normal and high levels of PaO2 on the levels of cytokines (TNF-α, IL-6, and IL-10) and organ damage enzymes (lactate dehydrogenase (LDH), aspartate aminotransferase (AST), and alanine aminotransferase (ALT)) were investigated in a rat CPB model. Moreover, the lung wet-to-dry weight (W/D) ratio was measured as an index of edema. In addition, dihydroethidium (DHE) staining was performed to detect superoxide production in the liver and lung tissues.
The experimental design is shown below. The animals were randomly divided into three groups: SHAM group received surgical procedure only without CPB, and PaO2 was controlled at 100–150 mmHg in the experiment period (n = 5), hyperoxia CPB group, PaO2 was controlled at greater than 400 mmHg during CPB (n = 7), and normoxia CPB group PaO2 was controlled at 100–150 mmHg during CPB (n = 7). In all experiments, CPB perfusion flow was controlled at 60–70 mL/kg/min. During the experimental period, the partial pressure of arterial carbon dioxide (PaCO2) was ordinarily controlled at 35–45 mmHg in all groups.
Blood samples were collected with every 60 min (pre-CPB, 60 min after initiation of CPB and end-CPB). Plasma levels of cytokines were measured by enzyme-linked immunosorbent assay (Quantikine® ELISA kit, R&D systems, Minneapolis, MN, USA,) and multiplex suspension array (Bio-PlexTM Assay Kits, Hercules, CA, USA). The concentrations of LDH, AST, and ALT were measured by automated colorimetry from plasma samples (DRI-CHEM 7000 Analyzer, FUJIFILM, Kanagawa, Japan). All animals were sacrificed at the end of experiments by potassium chloride injection into the heart, and the left lung was harvested and divided into three parts [25]. The lung block was weighed before and after desiccation for 72 h in a dry oven at 70 °C for the calculation of the W/D ratio [25]. Additionally, a part of the liver and the right lung were placed in cold PBS buffer and then embedded in a dry ice acetone method for cryo-sectioning. The frozen segments were cut into 7-μm-thick transverse sections that were then placed on glass slides [25]. DHE stain solution (Wako Pure Chemical Industries, Ltd., Osaka, Japan) diluted 30,000 times with dimethyl sulfoxide was topically applied to each tissue section. The slides were incubated in a light-protected chamber at 37 °C for 30 min. Images of the tissue sections were obtained using a fluorescence microscope (wavelength 594 nm, exposure time 80 ms) with a rhodamine filter [25]. Fluorescence intensity, which positively correlates with the amount of superoxide generation, was determined in the liver and lung tissues using software (Image J, v1.60, National Institutes of Health, Bethesda, MD).
All value is presented as means ± standard error (SE). Comparisons among groups were performed using analysis of variance (ANOVA). Fisher’s PLSD post hoc test was used for subsequent comparisons between groups at the same time points. Statistical analyses were performed with Stat View 5.0 (Abacus Concepts, Berkeley, CA, USA). Statistical significance was assumed when the p value was less than 0.05. The following studies underwent similar statistical processing.
Figure 3 shows the results [25]. Before CPB, the plasma levels of inflammatory and organ damage enzymes were not significantly different among the SHAM, hyperoxia CPB, and normoxia CPB groups. In the SHAM group, plasma inflammatory and organ damage enzymes remained unchanged during the experiment. In the hyperoxia CPB group, pro-inflammatory cytokines (TNF-α and IL-6) increased significantly, reaching a maximum at the end of CPB. However, in the normoxia CPB group, the increases in the pro-inflammatory cytokines were significantly suppressed by approximately 40% compared to the hyperoxia CPB group (Figure 3a,b). On the other hand, in the normoxia CPB group, IL-10 significantly increased, reaching a maximum at the end of CPB, approximately 60% higher in comparison to the hyperoxia CPB group at the end of CPB (Figure 3c).
In the hyperoxia CPB group, the levels of LDH, AST, and ALT increased significantly 60 min after CPB initiation and increased further at the end of CPB. On the other hand, in the normoxia CPB group, the elevated levels of organ damage enzymes were significantly suppressed by approximately 50% at the end of CPB compared to the hyperoxia CPB group (Figure 3d–f). Neither AST nor ALT levels changed significantly during CPB from the pre-CPB levels in the normoxia group. The CPB groups showed significantly higher W/D ratios than the SHAM group (Figure 4). Although, the increase in the W/D ratio was significantly suppressed in the normoxia CPB group compared to the hyperoxia CPB group. DHE staining in the lung and liver tissues was strikingly enhanced in the hyperoxia CPB compared to the normoxia CPB group (Figure 5a,b), this data suggesting greater superoxide production with a hyperoxia condition management during CPB.

2.3. Effect of Blood Plasma Substitute Priming on the Systemic Inflammation and Lung Edema Following Cardiopulmonary Bypass

Recently, a new 6% hydroxyethyl starch (HES) with a medium molecular weight (130 kDa) and a very low substitution degree (0.4) was used as a blood plasma substitute (6% HES 130/0.4; VOLUVEN®, Fresenius AG, Bad Homburg, Germany). This HES has already been approved in many countries for general fluid replacement. It has also been reported that 6% HES 130/0.4 has pharmacodynamics and pharmacokinetic advantages, such as deceased tissue storage, rapid plasma elimination, and low impact on the blood coagulation system [32,33]. In addition, recent studies have shown that fluid replacement with HES 130/0.4 reduced the inflammation during gastroenterological surgery [34]. We hypothesized that 6% HES 130/0.4 as CPB priming solution would attenuate the systemic inflammatory response with a reduction of pro-inflammatory cytokine levels, providing protective effects against organ tissue damage during CPB [35]. Therefore, in a previous study [16], the effectiveness of HES as CPB priming solution was examined. Plasma levels of TNF-α, IL-6, and colloid osmotic pressure (COP) were investigated in the rat CPB model. Additionally, the lung tissue W/D ratio was studied.
The animals were randomly divided into three groups: SHAM group (n = 5), Ringer’s acetate CPB group (n = 7), and HES 130/0.4 CPB group (n = 7). The SHAM group received surgical preparation only without CPB. In the Ringer’s acetate CPB group, the CPB circuit was primed with Ringer’s acetate solution (Veen F® Kowa Co., Ltd.), and in the HES 130/0.4 CPB group, the CPB system was primed with 6% HES 130/0.4 (VOLUVEN®, Fresenius Kabi Japan K.K.). CPB perfusion flow was controlled at 60–70 mL/kg/min. Respectively, the PaCO2 and PaO2 controlled at 35–45 and 300–400 mmHg. Blood samples were collected at five defined time points, pre-CPB, 30 min, 60 min, 90 min, and 120 min (end-CPB). The 0.9% NaCl was used in fluid replacement management. The 0.9% NaCl was injected by 0.5 mL at the blood sampling timing (total injection volume of 2.5 mL during the experiment).
Pre CPB, the plasma levels of TNF-α and IL-6 were not significantly different among the SHAM, Ringer’s acetate CPB, and HES 130/0.4 CPB groups. Plasma levels of TNF-α and IL-6 remained unchanged during the experimental periods in the SHAM group. In the Ringer’s acetate CPB group, TNF-α and IL-6 increased significantly, reaching a maximum at the end of CPB. However, in the HES 130/0.4 CPB group, the increases in the pro-inflammatory cytokines were significantly suppressed by approximately 35% compared to the Ringer’s acetate CPB group (Figure 6a,b). In addition, it was possible to preserve normal plasma COP levels in the HES CPB group during the experiment (Figure 7). The introduce CPB groups showed significantly higher W/D ratios than the SHAM group (SHAM 4.85 ± 0.08, Ringer’s acetate CPB 6.29 ± 0.14, HES 130/0.4 CPB 5.63 ± 0.15) (Figure 8). On the other hand, the increase in the W/D ratio was significantly suppressed in the HES 130/0.4 CPB group compared to the Ringer’s acetate CPB group.

2.4. Method of Suppressing the Inflammatory Response during Extracorporeal Circulation

In a previous article, we examined the protective effect of hydrogen gas (H2) in a rat CPB model [24]. We hypothesized that H2 insufflation would attenuate the systemic inflammation with a reduction of cytokine levels, providing protective effects against organ damage during CPB.
The animals were randomly divided into three groups: SHAM group (n = 5), CPB group and CPB + H2 group (n = 7), in which H2 was given into an oxygenator during CPB for 60 min. In the CPB + H2 group (n = 7), H2 was added into the membranous oxygenator during CPB at a concentration of 1.4 % (O2 flow: H2 flow = 1:1). Blood samples were collected pre and 20 and 60 min after the initiation of CPB (end of CPB). Plasma cytokine levels (TNF-α, IL-6, IL-10) were measured. The W/D ratio of the lung was also measured end of experiment.
In the CPB group, the cytokine levels increased significantly 20 min after CPB initiation and increased further at the end of CPB compared with the SHAM group. However, in the CPB + H2 group, such increases were significantly suppressed at the end of CPB (Figure 9).
We suggest that H2 is a possible new potential therapy for counteracting CPB-induced systemic inflammation. H2 insufflation may attenuate the hyperoxia induced formation of ROS and cytokines through the antioxidant effects. In addition, efforts to control inflammation in the extracorporeal circulation include new methods for directly removing leucocytes and cytokines [36] and development of new coatings and drugs [37]. The strategy of enhancing the biocompatibility of extracorporeal circulation devices and suppressing inflammation will continue in the future.

3. Summary

The present study proved that the pro-inflammatory cytokines significantly increased more in the high oxygen partial pressure condition CPB [25]. Furthermore, the lung tissues in the hyperoxia control CPB had higher W/D ratio than the physiologic oxygen partial pressure control CPB, and, therefore, they are presumed to have formation of edema. Additionally, DHE staining for generation of superoxide indicated that there was a striking increase in the liver and lung tissues in the high oxygen partial pressure condition CPB. Several studies have shown that the surfaces of the artificial material activate platelets, leucocytes, and the immune complement system. Activated monocyte-macrophage lineage release cytotoxic agents and ROS associated with the systemic inflammatory response and damage to principal organs [38,39]. There has been a study that showed that hyperoxic condition exposure induces oxidative stress that may activate necroptosis, which is involved in the pathology of hyperoxic acute lung injury [40].
Our hypothesis is that hyperoxia condition causes an increased generation of ROS and confounds the systemic inflammation and damage to principal organs during CPB. The primary product in cellular ROS production is the anion of superoxide. As shown in the present our study, DHE stain fluorescence was used to detect superoxide intracellularly. This is an extensively used method for detection of superoxide [41]. The present data show that the DHE stain fluorescence of the lung and liver tissues was conspicuously enhanced in the oxygen excessive supply condition during CPB.
Additionally, in our study [35], a blood plasma substitute (6% HES 130/0.4) was used as a CPB system priming solution, and the impacts on the systemic inflammatory response and lung edema following CPB were analyzed in a rat model. It was demonstrated that biochemical markers and cytokines for organ damage were effectively suppressed in the HES 130/0.4 CPB group compared to those in the Ringer’s acetate CPB group during CPB in the rat model. The lungs of rats in the Ringer’s acetate CPB group had a higher W/D ratio at the end of experiment than the HES 130/0.4 CPB group and are, therefore, presumed to have formation of edema. Maintenance of a normal COP led to suppression of the systemic inflammatory response and lung edema in the HES 130/0.4 CPB group. The mechanism of the anti-inflammatory effects of 6% HES 130/0.4 in CPB is to maintain COP. Maintenance of a normal COP by HES 130/0.4 suppresses vascular hyperpermeability, further reducing damage to the vascular endothelium and cells of organs. In current clinical research, rehydration therapy with HES 130/0.4 significantly improved tissue oxygenation in patients undergoing gastroenterological surgery [42]. Contrastingly, an equivalent amount of a crystalloid fluids were associated with a striking deterioration of cellular tissue oxygenation. Adverse effects of crystalloid fluids massive infusions were explained by the fact that crystalloid fluids were mainly distributed in the intercellular cement, resulting in reduced interstitial COP and, later, endothelial and cell tissue edema [42]. In addition, there is evidence from animal studies suggesting that COP decrease causes shedding of the endothelial glycocalyx layer so as to significantly increase the capillary leak of albumin and possibly of other plasma proteins [43]. Maintenance of a normal COP suppresses vascular hyperpermeability, further reducing damage to the endothelial glycocalyx layer. Recently, some papers have reported that CPB-induced inflammation is associated with glycocalyx degradation [44]. HES 130/0.4 has the potential to improve organ tissue microcirculation. On the other hand, in the latest review, it was said that there is almost no clinical difference between colloidal solution and crystalloid solution in critically ill patients [45]. The certainty of the evidence may improve with inclusion of ongoing studies in future updates.
From another point of view, it is time to fundamentally review the method of extracorporeal circulation and the surgical procedure for inflammation control in cardiac surgery. It is thought that it is necessary to review the surgical procedure without regard to the conventional method. More recently, minimally invasive cardiac surgery and minimally invasive extracorporeal circulation technologies are actively performed [46,47], and improvement of patient outcomes is expected. Long-duration follow-up data are needed to identify any long-term advantage. In addition, drugs such as steroids are also administered for cardiac surgery, aiming at suppressing inflammation and protecting vital organs [48,49]. There has been considerable research on this subject, but the results are unclear [50,51,52]. Furthermore, the effect of inhibiting inflammation by preoperative plasma-thrombo-leukocyte apheresis has also been reported in an animal experiment [53]. In clinical sites, the focus has been on the potential of leukocyte removal, and anti-inflammatory strategies used to reduce CPB-related complications have been analyzed in a systematic review of randomized, controlled trials [54]. This analysis suggests use of a leukocyte filter [55,56]. Proactive intervention from the preoperative phase may also be necessary for inflammation control. There are other groups that have evaluated inflammation in small animal extracorporeal circulation models, as well as our group [57,58]. Wang and colleagues reported the anti-inflammatory effects of ozone [59].
In the future, it is important to develop high biocompatibility devices, eliminate active oxygen generation, use anti-inflammatory drugs, and remove direct inflammatory substances to suppress inflammation during ECC. Basic research on the biological response to extracorporeal circulation is very important, and there is no doubt that a physiologically close circulation can suppress inflammation. On the other hand, it is generally known that CPB induces myocardial damage. Furthermore, the biological properties of myocardial injury after cardiac arrest is introduced are strongly associated with apoptosis and increased inflammation of myocardial tissue, causing transient cardiac dysfunction. At present, basic research using small animals was mainly conducted during CPB, and no studies evaluated after CPB. Further studies are needed to assess the apoptosis and inflammation in myocardial tissue after CPB.

4. Ethics Approval and Consent to Participate

This study was approved by the National Cerebral and Cardiovascular Center Research Institute Animal Care and Use Committee and the Niigata University of Health and Welfare Animal Care and Use Committee (ethical code: 30009,28010). All procedures met the National Institutes of Health guidelines for animal care.

Availability of Data and Materials

Data sharing is not applicable to this article as no datasets were generated or analyzed during the current study.

Conflicts of Interest

The author declare that they have no competing interests.

Abbreviations

ECCExtra-corporeal circulation
CPBCardio-pulmonary bypass
W/DWet-to-dry
DHEDihydroethidium
ROSReactive oxygen species (ROS)
PaO2Arterial pressure of oxygen
PaCO2Arterial pressure of carbon dioxide
SEStandard error
ANOVAAnalysis of variance
PLSDProtected least significant difference
COPColloid osmotic pressure

References

  1. Evora, P.R.; Bottura, C.; Arcêncio, L.; Albuquerque, A.A.; Évora, P.M.; Rodrigues, A.J. Key Points for Curbing Cardiopulmonary Bypass Inflammation. Acta Cir. Bras. 2016, 31, 45–52. [Google Scholar] [CrossRef] [PubMed] [Green Version]
  2. Gibbon, J.H., Jr. The application of a mechanical heart and lung apparatus to cardiac surgery. Minn. Med. 1954, 37, 171–185. [Google Scholar] [PubMed]
  3. Bigelow, W.G. Application of hypothermia to cardiac surgery. Minn. Med. 1954, 37, 181–185. [Google Scholar] [PubMed]
  4. Kowalik, M.M.; Lango, R.; Siondalski, P.; Chmara, M.; Brzeziński, M.; Lewandowski, K.; Jagielak, D.; Klapkowski, A.; Rogowski, J. Clinical, biochemical and genetic risk factors for 30-day and 5-year mortality in 518 adult patients subjected to cardiopulmonary bypass during cardiac surgery—The INFLACOR study. Acta Biochim. Pol. 2018, 65, 241–250. [Google Scholar] [CrossRef] [Green Version]
  5. Long, D.M.; Jenkins, E.; Griffith, K. Perfusionist techniques of reducing acute kidney injury following cardiopulmonary bypass: An evidence-based review. Perfusion 2015, 30, 25–32. [Google Scholar] [CrossRef]
  6. Bronicki, R.A.; Hall, M. Cardiopulmonary Bypass-Induced Inflammatory Response: Pathophysiology and Treatment. Pediatr. Crit. Care Med. 2016, 17 (Suppl. S1), S272–S278. [Google Scholar] [CrossRef]
  7. Moor, D.; Aggarwal, G.; Quiney, N. Systemic response to surgery. Surgery (Oxf.) 2017, 35, 220–223. [Google Scholar] [CrossRef]
  8. Baehner, T.; Boehm, O.; Probst, C.; Poetzsch, B.; Hoeft, A.; Baumgarten, G.; Knuefermann, P. Cardiopulmonary bypass in cardiac surgery. Anaesthesist 2012, 61, 846–856. [Google Scholar] [CrossRef]
  9. Murphy, G.J.; Angelini, G.D. Side effects of cardiopulmonary bypass: What is the reality? J. Card. Surg. 2004, 19, 481–488. [Google Scholar] [CrossRef]
  10. Ben-Abraham, R.; Weinbroum, A.A.; Dekel, B.; Paret, G. Chemokines and the inflammatory response following cardiopulmonary bypass--a new target for therapeutic intervention? A review. Paediatr. Anaesth. 2003, 13, 655–661. [Google Scholar] [CrossRef] [Green Version]
  11. Liguori, G.R.; Kanas, A.F.; Moreira, L.F. Managing the inflammatory response after cardiopulmonary bypass: Review of the studies in animal models. Rev. Bras. Cir. Cardiovasc. 2014, 29, 93–102. [Google Scholar] [CrossRef] [Green Version]
  12. Hirai, S. Systemic inflammatory response syndrome after cardiac surgery under cardiopulmonary bypass. Ann. Thorac. Cardiovasc. Surg. 2003, 9, 365–370. [Google Scholar]
  13. Jaffer, U.; Wade, R.G.; Gourlay, T. Cytokines in the systemic inflammatory. response syndrome: A review. HSR Proc. Intensive Care Cardiovasc. Anesth. 2010, 2, 161–175. [Google Scholar]
  14. Chegeni, S.A.; Rahimzadeh, M.; Montazerghaem, H.; Khayatian, M.; Dasturian, F.; Naderi, N. Preliminary Report on the Association Between STAT3 Polymorphisms and Susceptibility to Acute Kidney Injury After Cardiopulmonary Bypass. Biochem. Genet. 2018, 56, 627–638. [Google Scholar] [CrossRef]
  15. Greenberg, J.H.; Whitlock, R.; Zhang, W.R.; Thiessen-Philbrook, H.R.; Zappitelli, M.; Devarajan, P.; Eikelboom, J.; Kavsak, P.A.; Devereaux, P.J.; Shortt, C.; et al. TRIBE-AKI Consortium. Interleukin-6 and interleukin-10 as acute kidney injury biomarkers in pediatric cardiac surgery. Pediatr. Nephrol. 2015, 30, 1519–1527. [Google Scholar] [CrossRef] [Green Version]
  16. Träger, K.; Fritzler, D.; Fischer, G.; Schröder, J.; Skrabal, C.; Liebold, A.; Reinelt, H. Treatment of post-cardiopulmonary bypass SIRS by hemoadsorption: A case series. Int. J. Artif. Organs 2016, 39, 141–146. [Google Scholar] [CrossRef]
  17. Thakar, C.V.; Worley, S.; Arrigain, S.; Yared, J.P.; Paganini, E.P. Influence of renal dysfunction on mortality after cardiac surgery: Modifying effect of preoperative renal function. Kidney Int. 2005, 67, 1112–1119. [Google Scholar] [CrossRef] [PubMed] [Green Version]
  18. Dasta, J.F.; Kane-Gill, S.L.; Durtschi, A.J.; Pathak, D.S.; Kellum, J.A. Costs and outcomes of acute kidney injury (AKI) following cardiac surgery. Nephrol. Dial. Transplant. 2008, 23, 1970–1974. [Google Scholar] [CrossRef] [Green Version]
  19. Abdelhadi, R.H.; Gurm, H.S.; Van Wagoner, D.R.; Chung, M.K. Relation of an exaggerated rise in white blood cells after coronary bypass or cardiac valve surgery to development of atrial fibrillation postoperatively. Am. J. Cardiol. 2004, 93, 1176–1178. [Google Scholar] [CrossRef] [PubMed]
  20. Lamm, G.; Auer, J.; Weber, T.; Berent, R.; Ng, C.; Eber, B. Postoperative white blood cell count predicts atrial fibrillation after cardiac surgery. J. Cardiothorac. Vasc. Anesth. 2006, 20, 51–56. [Google Scholar] [CrossRef] [PubMed]
  21. Fontes, M.L.; Amar, D.; Kulak, A.; Koval, K.; Zhang, H.; Shi, W.; Thaler, H. Increased preoperative white blood cell count predicts postoperative atrial fibrillation after coronary artery bypass surgery. J. Cardiothorac. Vasc. Anesth. 2009, 23, 484–487. [Google Scholar] [CrossRef]
  22. Sabol, F.; Jakubová, M.; Mitro, P.; Bomba, A.; Chmelárová, A.; Petrášová, D.; Stančák, B.; Nagy, V.; Török, P.; Sebová, A. Is there a relationship between inflammatory markers, oxidative stress and postoperative atrial fibrillation? Vnitr. Lek. 2012, 58, 730–734. [Google Scholar] [PubMed]
  23. Fontes, M.L.; Mathew, J.P.; Rinder, H.M.; Zelterman, D.; Smith, B.R.; Rinder, C.S. Multicenter Study of Perioperative Ischemia (McSPI) Research Group. Atrial fibrillation after cardiac surgery/cardiopulmonary bypass is associated with monocyte activation. Anesth. Analg. 2005, 101, 17–23. [Google Scholar] [CrossRef] [PubMed]
  24. Fujii, Y.; Shirai, M.; Inamori, S.; Shimouchi, A.; Sonobe, T.; Tsuchimochi, H.; Pearson, J.T.; Takewa, Y.; Tatsumi, E.; Taenaka, Y. Insufflation of Hydrogen Gas Restrains the Inflammatory Response of Cardiopulmonary Bypass in a Rat Model. Artif. Organs 2013, 37, 136–141. [Google Scholar] [CrossRef] [PubMed]
  25. Fujii, Y.; Shirai, M.; Tsuchimochi, H.; Pearson, J.T.; Takewa, Y.; Tatsumi, E.; Taenaka, Y. Hyperoxic condition promotes an inflammatory response during cardiopulmonary bypass in a rat model. Artif. Organs 2013, 37, 1034–1040. [Google Scholar] [CrossRef] [PubMed]
  26. Fujii, Y.; Shirai, M.; Pearson, J.T.; Takewa, Y.; Tatsumi, E. Changes in inflammatory response during and after cardiopulmonary bypass using a rat extracorporeal circulation model. Conf. Proc. IEEE Eng. Med. Biol. Soc. 2015, 2015, 957–960. [Google Scholar]
  27. Sukumaran, V.; Tsuchimochi, H.; Fujii, Y.; Hosoda, H.; Kangawa, K.; Akiyama, T.; Shirai, M.; Tatsumi, E.; Pearson, J.T. Ghrelin Pre-treatment Attenuates Local Oxidative Stress and End Organ Damage During Cardiopulmonary Bypass in Anesthetized Rats. Front. Physiol. 2018, 9, 196. [Google Scholar] [CrossRef] [Green Version]
  28. Fujii, Y.; Shirai, M.; Inamori, S.; Takewa, Y.; Tatsumi, E. A novel small animal extracorporeal circulation model for studying pathophysiology of cardiopulmonary bypass. J. Artif. Organs 2015, 18, 35–39. [Google Scholar] [CrossRef]
  29. Kilgannon, J.H.; Jones, A.E.; Shapiro, N.I.; Angelos, M.G.; Milcarek, B.; Hunter, K.; Parrillo, J.E.; Trzeciak, S. Investigators. Association between arterial hyperoxia following resuscitation from cardiac arrest and in-hospital mortality. JAMA 2010, 303, 2165–2171. [Google Scholar] [CrossRef] [Green Version]
  30. Lee, P.J.; Choi, A.M. Pathways of cell signaling in hyperoxia. Free Radic. Biol. Med. 2003, 35, 341–350. [Google Scholar] [CrossRef]
  31. Morita, K. Surgical reoxygenation injury of the myocardium in cyanotic patients: Clinical relevance and therapeutic strategies by normoxic management during cardiopulmonary bypass. Gen. Thorac. Cardiovasc. Surg. 2012, 60, 549–556. [Google Scholar] [CrossRef] [PubMed]
  32. Jungheinrich, C.; Scharpf, R.; Wargenau, M.; Bepperling, F.; Baron, J.F. The pharmacokinetics and tolerability of an intravenous infusion of the new hydroxyethyl starch 130/0.4 (6%, 500 mL) in mild-to-severe renal impairment. Anesth. Analg. 2002, 95, 544–551. [Google Scholar] [PubMed]
  33. Felfernig, M.; Franz, A.; Bräunlich, P.; Fohringer, C.; Kozek-Langenecker, S.A. The effects of hydroxyethyl starch solutions on thromboelastography in preoperative male patients. Acta Anaesthesiol. Scand. 2003, 47, 70–73. [Google Scholar] [CrossRef] [PubMed]
  34. Lang, K.; Suttner, S.; Boldt, J.; Kumle, B.; Nagel, D. Volume replacement with HES 130/0.4 may reduce the inflammatory response in patients undergoing major abdominal surgery. Can. J. Anaesth. 2003, 50, 1009–1016. [Google Scholar] [CrossRef]
  35. Fujii, Y.; Tanabe, T.; Yamashiro, T.; Shirai, M.; Takewa, Y.; Tatsumi, E. Effect of Hydroxyethyl Starch Priming on the Systemic Inflammatory Response and Lung Edema after Cardiopulmonary Bypass in a Rat Model. ASAIO J. 2017, 63, 618–623. [Google Scholar] [CrossRef]
  36. Fujii, Y. The potential of the novel leukocyte removal filter in cardiopulmonary bypass. Expert Rev. Med. Devices 2016, 13, 5–14. [Google Scholar] [CrossRef]
  37. Salameh, A.; Dhein, S.; Dähnert, I.; Klein, N. Neuroprotective Strategies during Cardiac Surgery with Cardiopulmonary Bypass. Int. J. Mol. Sci. 2016, 17, 1945. [Google Scholar] [CrossRef] [Green Version]
  38. Fudulu, D.; Angelini, G. Oxidative Stress after Surgery on the Immature Heart. Oxid. Med. Cell. Longev. 2016, 2016, 1971452. [Google Scholar] [CrossRef] [Green Version]
  39. McDonald, C.I.; Fraser, J.F.; Coombes, J.S.; Fung, Y.L. Oxidative stress during extracorporeal circulation. Eur. J. Cardiothorac. Surg. 2014, 46, 937–943. [Google Scholar] [CrossRef] [Green Version]
  40. Han, C.H.; Guan, Z.B.; Zhang, P.X.; Fang, H.L.; Li, L.; Zhang, H.M.; Zhou, F.J.; Mao, Y.F.; Liu, W.W. Oxidative stress induced necroptosis activation is involved in the pathogenesis of hyperoxic acute lung injury. Biochem. Biophys. Res. Commun. 2018, 495, 2178–2183. [Google Scholar] [CrossRef]
  41. Jones, C.I., 3rd; Han, Z.; Presley, T.; Varadharaj, S.; Zweier, J.L.; Ilangovan, G.; Alevriadou, B.R. Endothelial cell respiration is affected by the oxygen tension during shear exposure: Role of mitochondrial peroxynitrite. Am. J. Physiol. Cell Physiol. 2008, 295, 180–191. [Google Scholar] [CrossRef] [Green Version]
  42. Lang, K.; Boldt, J.; Suttner, S.; Haisch, G. Colloids versus crystalloids and tissue oxygen tension in patients undergoing major abdominal surgery. Anesth. Analg. 2001, 93, 405–409. [Google Scholar]
  43. Woodcock, T.E.; Woodcock, T.M. Revised Starling equation and the glycocalyx model of transvascular fluid exchange: An improved paradigm for prescribing intravenous fluid therapy. Br. J. Anaesth. 2012, 108, 384–394. [Google Scholar] [CrossRef] [Green Version]
  44. Aljure, O.D.; Fabbro, M., 2nd. Cardiopulmonary Bypass and Inflammation: The Hidden Enemy. J. Cardiothorac. Vasc. Anesth. 2019, 33, 346–347. [Google Scholar] [CrossRef] [Green Version]
  45. Lewis, S.R.; Pritchard, M.W.; Evans, D.J.; Butler, A.R.; Alderson, P.; Smith, A.F.; Roberts, I. Colloids versus crystalloids for fluid resuscitation in critically ill people. Cochrane Database Syst Rev. 2018, 8, CD000567. [Google Scholar] [CrossRef]
  46. Chang, C.; Raza, S.; Altarabsheh, S.E.; Delozier, S.; Sharma, U.M.; Zia, A.; Khan, M.S.; Neudecker, M.; Markowitz, A.H.; Sabik, J.F., 3rd; et al. Minimally Invasive Approaches to Surgical Aortic Valve Replacement: A Meta-Analysis. Ann. Thorac. Surg. 2018, 106, 1881–1889. [Google Scholar] [CrossRef]
  47. Winkler, B.; Heinisch, P.P.; Gahl, B.; Aghlmandi, S.; Jenni, H.J.; Carrel, T.P. Minimally Invasive Extracorporeal Circulation Circuit Is Not Inferior to Off-Pump Coronary Artery Bypass Grafting: Meta-Analysis Using the Bayesian Method. Ann. Thorac. Surg. 2017, 103, 342–350. [Google Scholar] [CrossRef] [Green Version]
  48. Jacob, K.A.; Nathoe, H.M.; Dieleman, J.M.; van Osch, D.; Kluin, J.; van Dijk, D. Inflammation in new-onset atrial fibrillation after cardiac surgery: A systematic review. Eur. J. Clin. Investig. 2014, 44, 402–428. [Google Scholar] [CrossRef] [Green Version]
  49. Scrascia, G.; Rotunno, C.; Guida, P.; Amorese, L.; Polieri, D.; Codazzi, D.; Paparella, D. Perioperative steroids administration in pediatric cardiac surgery: A meta-analysis of randomized controlled trials*. Pediatr. Crit. Care Med. 2014, 15, 435–442. [Google Scholar] [CrossRef]
  50. Royse, C.F.; Saager, L.; Whitlock, R.; Ou-Young, J.; Royse, A.; Vincent, J.; Devereaux, P.J.; Kurz, A.; Awais, A.; Panjasawatwong, K.; et al. Impact of Methylprednisolone on Postoperative Quality of Recovery and Delirium in the Steroids in Cardiac Surgery Trial: A Randomized, Double-blind, Placebo-controlled Substudy. Anesthesiology 2017, 126, 223–233. [Google Scholar] [CrossRef]
  51. Pasquali, S.K.; Hall, M.; Li, J.S.; Peterson, E.D.; Jaggers, J.; Lodge, A.J.; Marino, B.S.; Goodman, D.M.; Shah, S.S. Corticosteroids and outcome in children undergoing congenital heart surgery: Analysis of the pediatric health information systems database. Circulation 2010, 122, 2123–2130. [Google Scholar] [CrossRef] [PubMed] [Green Version]
  52. Whitlock, R.P.; Devereaux, P.J.; Teoh, K.H.; Lamy, A.; Vincent, J.; Pogue, J.; Paparella, D.; Sessler, D.I.; Karthikeyan, G.; Villar, J.C.; et al. SIRS Investigators. Methylprednisolone in patients undergoing cardiopulmonary bypass (SIRS): A randomised, double-blind, placebo-controlled trial. Lancet 2015, 386, 1243–1253. [Google Scholar] [CrossRef]
  53. Scrascia, G.; Guida, P.; Rotunno, C.; de Luca Tupputi Schinosa, L.; Paparella, D. Anti-inflammatory strategies to reduce acute kidney injury in cardiac surgery patients: A meta-analysis of randomized controlled trials. Artif. Organs 2014, 38, 101–112. [Google Scholar] [CrossRef] [PubMed]
  54. Onorati, F.; Santini, F.; Mariscalco, G.; Bertolini, P.; Sala, A.; Faggian, G.; Mazzucco, A. Leukocyte filtration ameliorates the inflammatory response in patients with mild to moderate lung dysfunction. Ann. Thorac. Surg. 2011, 92, 111–121. [Google Scholar] [CrossRef]
  55. Rubino, A.S.; Serraino, G.F.; Mariscalco, G.; Marsico, R.; Sala, A.; Renzulli, A. Leukocyte depletion during extracorporeal circulation allows better organ protection but does not change hospital outcomes. Ann. Thorac. Surg. 2011, 91, 534–540. [Google Scholar] [CrossRef]
  56. Wagner, R.; Piler, P.; Uchytil, B.; Halouzka, R.; Kovaru, H.; Bobkova, M.; Nemec, P. Systemic inflammatory response syndrome is reduced by preoperative plasma-thrombo-leukocyte aphaeresis in a pig model of cardiopulmonary bypass. Biomed. Pap. Med. Fac. Univ. Palacky Olomouc. Czech Repub. 2016, 160, 399–406. [Google Scholar] [CrossRef] [Green Version]
  57. Pinto, A.; Jahn, A.; Immohr, M.B.; Jenke, A.; Döhrn, L.; Kornfeld, M.; Lichtenberg, A.; Akhyari, P.; Boeken, U. Modulation of Immunologic Response by Preventive Everolimus Application in a Rat CPB Model. Inflammation 2016, 39, 1771–1782. [Google Scholar] [CrossRef]
  58. Engels, M.; Bilgic, E.; Pinto, A.; Vasquez, E.; Wollschläger, L.; Steinbrenner, H.; Kellermann, K.; Akhyari, P.; Lichtenberg, A.; Boeken, U. A cardiopulmonary bypass with deep hypothermic circulatory arrest rat model for the investigation of the systemic inflammation response and induced organ damage. J. Inflamm. (Lond.) 2014, 11, 26. [Google Scholar] [CrossRef] [Green Version]
  59. Wang, Z.; Zhang, A.; Meng, W.; Wang, T.; Li, D.; Liu, Z.; Liu, H. Ozone protects the rat lung from ischemia-reperfusion injury by attenuating NLRP3-mediated inflammation, enhancing Nrf2 antioxidant activity and inhibiting apoptosis. Eur. J. Pharmacol. 2018, 835, 82–93. [Google Scholar] [CrossRef]
Biology 09 00081 g001 550
Figure 1. Summary of the inflammatory response in cardiopulmonary bypass (CPB).
Figure 1. Summary of the inflammatory response in cardiopulmonary bypass (CPB).
Biology 09 00081 g001
Biology 09 00081 g002 550
Figure 2. The small animal cardiopulmonary bypass (CPB) model. A polypropylene membranous oxygenator with a membrane area of 0.03 m2, a polyvinyl chloride tubing line, and a roller pump are shown [28]. (a), schema, (b), actual situation.
Figure 2. The small animal cardiopulmonary bypass (CPB) model. A polypropylene membranous oxygenator with a membrane area of 0.03 m2, a polyvinyl chloride tubing line, and a roller pump are shown [28]. (a), schema, (b), actual situation.
Biology 09 00081 g002
Biology 09 00081 g003 550
Figure 3. Plasma levels of tumor necrosis factor (TNF)-α (a), interleukin (IL)-6 (b), IL-10 (c), lactate dehydrogenase (LDH) (d), aspartate aminotransferase (AST) (e), alanine aminotransferase (ALT) (f) [25]. † p < 0.05 versus the SHAM group, * p < 0.05 versus the Normoxia CPB group at the same point in time.
Figure 3. Plasma levels of tumor necrosis factor (TNF)-α (a), interleukin (IL)-6 (b), IL-10 (c), lactate dehydrogenase (LDH) (d), aspartate aminotransferase (AST) (e), alanine aminotransferase (ALT) (f) [25]. † p < 0.05 versus the SHAM group, * p < 0.05 versus the Normoxia CPB group at the same point in time.
Biology 09 00081 g003
Biology 09 00081 g004 550
Figure 4. The wet-to-dry weight (W/D) ratio of the lung at the end of experiment [25]. † p < 0.05 versus the SHAM group, * p < 0.05 versus the Normoxia CPB group.
Figure 4. The wet-to-dry weight (W/D) ratio of the lung at the end of experiment [25]. † p < 0.05 versus the SHAM group, * p < 0.05 versus the Normoxia CPB group.
Biology 09 00081 g004
Biology 09 00081 g005a 550Biology 09 00081 g005b 550
Figure 5. Detection of superoxide production in liver and lung tissues. (a) Representative examples of in situ detection of superoxide in each group’s lung and liver. Confocal microscope sections of organ are labeled with the fluorescent oxidative dye dihydroethidium [25]. Scale bar: 100 μm. (b) Mean fluorescence intensity after deducting the values of SHAM. † p < 0.05 versus SHAM group, * p < 0.05 versus Normoxia CPB group [15]. a.u.: arbitrary units.
Figure 5. Detection of superoxide production in liver and lung tissues. (a) Representative examples of in situ detection of superoxide in each group’s lung and liver. Confocal microscope sections of organ are labeled with the fluorescent oxidative dye dihydroethidium [25]. Scale bar: 100 μm. (b) Mean fluorescence intensity after deducting the values of SHAM. † p < 0.05 versus SHAM group, * p < 0.05 versus Normoxia CPB group [15]. a.u.: arbitrary units.
Biology 09 00081 g005aBiology 09 00081 g005b
Biology 09 00081 g006 550
Figure 6. Plasma TNF-α (a) and IL-6 (b) [35]. * p < 0.05 versus the SHAM group, † p < 0.05 versus the HES 130/0.4 CPB group at the same point in time.
Figure 6. Plasma TNF-α (a) and IL-6 (b) [35]. * p < 0.05 versus the SHAM group, † p < 0.05 versus the HES 130/0.4 CPB group at the same point in time.
Biology 09 00081 g006
Biology 09 00081 g007 550
Figure 7. Colloid osmotic pressure (COP) during the experiment [35]. * p < 0.05 versus the SHAM group, † p < 0.05 versus the HES 130/0.4 CPB group at the same point in time.
Figure 7. Colloid osmotic pressure (COP) during the experiment [35]. * p < 0.05 versus the SHAM group, † p < 0.05 versus the HES 130/0.4 CPB group at the same point in time.
Biology 09 00081 g007
Biology 09 00081 g008 550
Figure 8. The wet-to-dry ratio of the lung at the end of experiment [35]. * p < 0.05 versus the SHAM group, † p < 0.05 versus the HES 130/0.4 CPB group.
Figure 8. The wet-to-dry ratio of the lung at the end of experiment [35]. * p < 0.05 versus the SHAM group, † p < 0.05 versus the HES 130/0.4 CPB group.
Biology 09 00081 g008
Biology 09 00081 g009 550
Figure 9. Plasma TNF-α (a), IL-6 (b), and IL-10 (c) [24]. † p < 0.05 versus the SHAM group, * p < 0.05 versus the CPB group at the same point in time.
Figure 9. Plasma TNF-α (a), IL-6 (b), and IL-10 (c) [24]. † p < 0.05 versus the SHAM group, * p < 0.05 versus the CPB group at the same point in time.
Biology 09 00081 g009

Share and Cite

MDPI and ACS Style

Fujii, Y. Evaluation of Inflammation Caused by Cardiopulmonary Bypass in a Small Animal Model. Biology 2020, 9, 81. https://doi.org/10.3390/biology9040081

AMA Style

Fujii Y. Evaluation of Inflammation Caused by Cardiopulmonary Bypass in a Small Animal Model. Biology. 2020; 9(4):81. https://doi.org/10.3390/biology9040081

Chicago/Turabian Style

Fujii, Yutaka. 2020. "Evaluation of Inflammation Caused by Cardiopulmonary Bypass in a Small Animal Model" Biology 9, no. 4: 81. https://doi.org/10.3390/biology9040081

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Metrics

Back to TopTop