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Effect of General Anesthesia Maintenance with Propofol or Sevoflurane on Fractional Exhaled Nitric Oxide and Eosinophil Blood Count: A Prospective, Single Blind, Randomized, Clinical Study on Patients Undergoing Thyroidectomy. J Pers Med 2022; 12:jpm12091455. [PMID: 36143240 PMCID: PMC9505258 DOI: 10.3390/jpm12091455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 08/31/2022] [Accepted: 09/01/2022] [Indexed: 11/30/2022] Open
Abstract
Background: Nitric oxide (NO) is considered a means of detecting airway hyperresponsiveness, since even non-asthmatic patients experiencing bronchospasm intraoperatively or postoperatively display higher levels of exhaled NO. It can also be used as a non-invasive biomarker of lung inflammation and injury. This prospective, single-blind, randomized study aimed to evaluate the impact of two different anesthesia maintenance techniques on fractional exhaled nitric oxide (FeΝO) in patients without respiratory disease undergoing total thyroidectomy under general anesthesia. Methods: Sixty patients without respiratory disease, atopy or known allergies undergoing total thyroidectomy were randomly allocated to receive either inhalational anesthesia maintenance with sevoflurane at a concentration that maintained Bispectral Index (BIS) values between 40 and 50 intraoperatively or intravenous anesthesia maintenance with propofol 1% targeting the same BIS values. FeΝO was measured immediately preoperatively (baseline), postoperatively in the Postanesthesia Care Unit and at 24 h post-extubation with a portable device. Other variables measured were eosinophil blood count preoperatively and postoperatively and respiratory parameters intraoperatively. Results: Patients in both groups presented lower than baseline values of FeΝO measurements postoperatively, which returned to baseline measurements at 24 h post-extubation. In the peripheral blood, a decrease in the percentage of eosinophils was demonstrated, which was significant only in the propofol group. Respiratory lung mechanics were better maintained in the propofol group as compared to the sevoflurane group. None of the patients suffered intraoperative bronchospasm. Conclusions: Both propofol and sevoflurane lead to the temporary inhibition of NO exhalation. They also seem to attenuate systemic hypersensitivity response by reducing the eosinophil count in the peripheral blood, with propofol displaying a more pronounced effect and ensuring a more favorable mechanical ventilation profile as compared to sevoflurane. The attenuation of NO exhalation by both agents may be one of the underlying mechanisms in the reduction in airway hyperreactivity. The clinical significance of this fluctuation remains to be studied in patients with respiratory disease.
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Audi SH, Ganesh S, Taheri P, Zhang X, Dash RK, Clough AV, Jacobs ER. Depolarized mitochondrial membrane potential and protection with duroquinone in isolated perfused lungs from rats exposed to hyperoxia. J Appl Physiol (1985) 2022; 132:346-356. [PMID: 34941441 PMCID: PMC8816614 DOI: 10.1152/japplphysiol.00565.2021] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Dissipation of mitochondrial membrane potential (Δψm) is a hallmark of mitochondrial dysfunction. Our objective was to use a previously developed experimental-computational approach to estimate tissue Δψm in intact lungs of rats exposed to hyperoxia and to evaluate the ability of duroquinone (DQ) to reverse any hyperoxia-induced depolarization of lung Δψm. Rats were exposed to hyperoxia (>95% O2) or normoxia (room air) for 48 h, after which lungs were excised and connected to a ventilation-perfusion system. The experimental protocol consisted of measuring the concentration of the fluorescent dye rhodamine 6 G (R6G) during three single-pass phases: loading, washing, and uncoupling, in which the lungs were perfused with and without R6G and with the mitochondrial uncoupler FCCP, respectively. For normoxic lungs, the protocol was repeated with 1) rotenone (complex I inhibitor), 2) rotenone and either DQ or its vehicle (DMSO), and 3) rotenone, glutathione (GSH), and either DQ or DMSO added to the perfusate. Hyperoxic lungs were studied with and without DQ and GSH added to the perfusate. Computational modeling was used to estimate lung Δψm from R6G data. Rat exposure to hyperoxia resulted in partial depolarization (-33 mV) of lung Δψm and complex I inhibition depolarized lung Δψm by -83 mV. Results also demonstrate the efficacy of DQ to fully reverse both rotenone- and hyperoxia-induced lung Δψm depolarization. This study demonstrates hyperoxia-induced Δψm depolarization in intact lungs and the utility of this approach for assessing the impact of potential therapies such as exogenous quinones that target mitochondria in intact lungs.NEW & NOTEWORTHY This study is the first to measure hyperoxia-induced Δψm depolarization in isolated perfused lungs. Hyperoxia resulted in a partial depolarization of Δψm, which was fully reversed with duroquinone, demonstrating the utility of this approach for assessing the impact of potential therapies that target mitochondria such as exogenous quinones.
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Affiliation(s)
- Said H. Audi
- 1Department of Biomedical Engineering, Marquette University-Medical College of Wisconsin, Milwaukee, Wisconsin,2Clement J. Zablocki V.A. Medical Center, Milwaukee, Wisconsin,3Division of Pulmonary and Critical Care Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Swetha Ganesh
- 1Department of Biomedical Engineering, Marquette University-Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Pardis Taheri
- 1Department of Biomedical Engineering, Marquette University-Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Xiao Zhang
- 1Department of Biomedical Engineering, Marquette University-Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Ranjan K. Dash
- 1Department of Biomedical Engineering, Marquette University-Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Anne V. Clough
- 2Clement J. Zablocki V.A. Medical Center, Milwaukee, Wisconsin,3Division of Pulmonary and Critical Care Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin,4Department of Mathematical and Statistical Sciences, Marquette University, Milwaukee, Wisconsin
| | - Elizabeth R. Jacobs
- 2Clement J. Zablocki V.A. Medical Center, Milwaukee, Wisconsin,3Division of Pulmonary and Critical Care Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
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Hocum Stone L, Oppler SH, Nugent JL, Gresch S, Hering BJ, Murtaugh MP, Hegstad-Davies RL, Ramachandran S, Graham ML. Serum cytokine profiles in healthy nonhuman primates are blunted by sedation and demonstrate sexual dimorphism as detected by a validated multiplex immunoassay. Sci Rep 2021; 11:2340. [PMID: 33504894 PMCID: PMC7840937 DOI: 10.1038/s41598-021-81953-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Accepted: 01/13/2021] [Indexed: 12/11/2022] Open
Abstract
Cytokine profiling is a valuable tool for monitoring immune responses associated with disease and treatment. This study assessed the impact of sex and sedation on serum cytokines in healthy nonhuman primates (NHPs). Twenty-three cytokines were measured from serum using a bead-based multiplex assay. Assay validation for precision, sensitivity, recovery, linearity, and stability was performed. Samples from male and female cynomolgus and rhesus macaques either cooperating or sedated were compared. All cytokines except TNFα demonstrated acceptable sensitivity and precision, with variable recovery and linearity. IFNγ, IL-2, IL-5, IL-6, IL-8, IL-12/23 (p40), IL-13, IL-15, MCP-1, TGFα, VEGF met acceptance criteria; G-CSF, IL-4, IL-10, MIP1α, sCD40L were marginal. Higher cytokine levels were observed in females and cytokine levels were blunted in sedated NHPs when compared to awake cooperating NHPs. Significant differences observed in cytokines related to sex, species, or imposed by handling highlight the importance of model design on translational relevance for clinical settings.
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Affiliation(s)
- Laura Hocum Stone
- Department of Surgery, University of Minnesota, Minneapolis, MN, 55455, USA
| | | | - Julia L Nugent
- Department of Surgery, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Sarah Gresch
- Department of Veterinary Population Medicine, University of Minnesota, St. Paul, MN, 55108, USA.,Veterinary Diagnostic Lab, College of Veterinary Medicine, University of Minnesota, St. Paul, MN, 55108, USA
| | - Bernhard J Hering
- Department of Surgery, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Michael P Murtaugh
- Department of Veterinary and Biomedical Sciences, University of Minnesota, St. Paul, MN, 55108, USA
| | | | | | - Melanie L Graham
- Department of Surgery, University of Minnesota, Minneapolis, MN, 55455, USA. .,Department of Veterinary Population Medicine, University of Minnesota, St. Paul, MN, 55108, USA.
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Hypoxia-Inducible Factor-1: A Potential Target to Treat Acute Lung Injury. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:8871476. [PMID: 33282113 PMCID: PMC7685819 DOI: 10.1155/2020/8871476] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 10/29/2020] [Accepted: 11/04/2020] [Indexed: 02/07/2023]
Abstract
Acute lung injury (ALI) is an acute hypoxic respiratory insufficiency caused by various intra- and extrapulmonary injury factors. Presently, excessive inflammation in the lung and the apoptosis of alveolar epithelial cells are considered to be the key factors in the pathogenesis of ALI. Hypoxia-inducible factor-1 (HIF-1) is an oxygen-dependent conversion activator that is closely related to the activity of reactive oxygen species (ROS). HIF-1 has been shown to play an important role in ALI and can be used as a potential therapeutic target for ALI. This manuscript will introduce the progress of HIF-1 in ALI and explore the feasibility of applying inhibitors of HIF-1 to ALI, which brings hope for the treatment of ALI.
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Cui X, Xu W, Neupane P, Weiser-Schlesinger A, Weng R, Pockros B, Li Y, Moayeri M, Leppla SH, Fitz Y, Eichacker PQ. Bacillus anthracis lethal toxin, but not edema toxin, increases pulmonary artery pressure and permeability in isolated perfused rat lungs. Am J Physiol Heart Circ Physiol 2019; 316:H1076-H1090. [PMID: 30767685 DOI: 10.1152/ajpheart.00685.2018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Although lethal toxin (LT) and edema toxin (ET) contribute to lethality during Bacillus anthracis infection, whether they increase vascular permeability and the extravascular fluid accumulation characterizing this infection is unclear. We employed an isolated perfused Sprague-Dawley rat lung model to investigate LT and ET effects on pulmonary vascular permeability. Lungs (n ≥ 6 per experimental group) were isolated, ventilated, suspended from a force transducer, and perfused. Lung weight and pulmonary artery (Ppa) and left atrial pressures were measured over 4 h, after which pulmonary capillary filtration coefficients (Kf.c) and lung wet-to-dry weight ratios (W/D) were determined. When compared with controls, LT increased Ppa over 4 h and Kf.c and W/D at 4 h (P < 0.0001). ET decreased Ppa in a significant trend (P = 0.09) but did not significantly alter Kf.c or W/D (P ≥ 0.29). Edema toxin actually blocked LT increases in Ppa but not LT increases in Kf.c and W/D. When Ppa was maintained at control levels, LT still increased Kf.c and W/D (P ≤ 0.004). Increasing the dose of each toxin five times significantly increased and a toxin-directed monoclonal antibody decreased the effects of each toxin (P ≤ 0.05). Two rho-kinase inhibitors (GSK269962 and Y27632) decreased LT increases in Ppa (P ≤ 0.02) but actually increased Kf.c and W/D in LT and control lungs (P ≤ 0.05). A vascular endothelial growth factor receptor inhibitor (ZM323881) had no significant effect (P ≥ 0.63) with LT. Thus, LT but not ET can increase pulmonary vascular permeability independent of increased Ppa and could contribute to pulmonary fluid accumulation during anthrax infection. However, pulmonary vascular dilation with ET could disrupt protective hypoxic vasoconstriction. NEW & NOTEWORTHY The most important findings from the present study are that Bacillus anthracis lethal toxin increases pulmonary artery pressure and pulmonary permeability independently in the isolated rat lung, whereas edema toxin decreases the former and does not increase permeability. Each effect could be a basis for organ dysfunction in patients with this lethal infection. These findings further support the need for adjunctive therapies that limit the effects of both toxins during infection.
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Affiliation(s)
- Xizhong Cui
- Critical Care Medicine Department, Clinical Center, National Institutes of Health, Bethesda, Maryland
| | - Wanying Xu
- Critical Care Medicine Department, Clinical Center, National Institutes of Health, Bethesda, Maryland
| | - Pranita Neupane
- Critical Care Medicine Department, Clinical Center, National Institutes of Health, Bethesda, Maryland
| | - Andie Weiser-Schlesinger
- Critical Care Medicine Department, Clinical Center, National Institutes of Health, Bethesda, Maryland
| | - Ray Weng
- Critical Care Medicine Department, Clinical Center, National Institutes of Health, Bethesda, Maryland
| | - Benjamin Pockros
- Critical Care Medicine Department, Clinical Center, National Institutes of Health, Bethesda, Maryland
| | - Yan Li
- Critical Care Medicine Department, Clinical Center, National Institutes of Health, Bethesda, Maryland
| | - Mahtab Moayeri
- Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health , Bethesda, Maryland
| | - Stephen H Leppla
- Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health , Bethesda, Maryland
| | - Yvonne Fitz
- Critical Care Medicine Department, Clinical Center, National Institutes of Health, Bethesda, Maryland
| | - Peter Q Eichacker
- Critical Care Medicine Department, Clinical Center, National Institutes of Health, Bethesda, Maryland
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Yang Z, Cheng F, Yan G, Xiong L, Liu H. Propofol protects against endotoxin-induced myocardial injury by inhibiting NF-κB-mediated inflammation. Exp Ther Med 2017; 15:2032-2036. [PMID: 29434801 PMCID: PMC5776645 DOI: 10.3892/etm.2017.5605] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 11/22/2017] [Indexed: 01/09/2023] Open
Abstract
This study investigated whether propofol protects against endotoxin-induced myocardial injury by inhibiting NF-κB-mediated inflammation. Thirty clean male SD rats were randomly divided into a control (n=10), a model (n=10) and a propofol group (n=10). The model and propofol groups were injected with lipopolysaccharide (LPS) via the caudal vein to establish animal models of myocardial injury. At the same time, the control group was injected with normal saline via the caudal vein. At 30 min after the injections, the propofol group was treated with a continuous intravenous infusion of propofol, the control and model groups were injected with normal saline, and the three groups were treated continuously for 4 h. The changes in levels of interleukin-1 (IL-1), interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) in serum were detected via enzyme-linked immunosorbent assay (ELISA). The mRNA expression level of nuclear factor-κB (NF-κB) in myocardial tissues was detected via quantitative real-time polymerase chain reaction (qRT-PCR). The protein expression levels of NF-κB, Bax and Bcl-2 in atrial muscles in each group were measured via Western blotting. The damage of myocardial tissues was detected via hematoxylin eosin (H&E) staining of tissues. Our results showed that compared with those in control group, the levels of IL-1, IL-6 and TNF-α in serum in the model and propofol groups were significantly higher; however, the levels in the model group, were significantly higher than those in the propofol group (P<0.01). The mRNA and protein expression levels of NF-κB in the propofol group were significantly lower than those in the model group (P<0.01). Likewise, the protein expression levels of Bax were significantly lower, while those of Bcl-2 were significantly increased. H&E staining showed that the myocardial tissues in the model group were damaged significantly, but the damage in the propofol group was significantly less severe. Based on our findings, it seems propofol can indeed protect against endotoxin-induced myocardial injury through its inhibition of the NF-κB-mediated inflammatory pathway.
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Affiliation(s)
- Zhijun Yang
- Department of Anesthesiology, Ezhou Central Hospital, Ezhou, Hubei 436000, P.R. China
| | - Feng Cheng
- Department of Clinical Laboratory, Ezhou Central Hospital, Ezhou, Hubei 436000, P.R. China
| | - Guosheng Yan
- Department of Anesthesiology, Ezhou Central Hospital, Ezhou, Hubei 436000, P.R. China
| | - Lang Xiong
- Department of Anesthesiology, Ezhou Central Hospital, Ezhou, Hubei 436000, P.R. China
| | - Huizhang Liu
- Department of Anesthesiology, Ezhou Central Hospital, Ezhou, Hubei 436000, P.R. China
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Du G, Wang S, Li Z, Liu J. Sevoflurane Posttreatment Attenuates Lung Injury Induced by Oleic Acid in Dogs. Anesth Analg 2017; 124:1555-1563. [PMID: 28431421 DOI: 10.1213/ane.0000000000002034] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND In animal models, both sevoflurane and propofol protect against acute lung injury (ALI), especially when administered prior to ALI onset. We hypothesized that when compared to propofol, sevoflurane administration after the onset of acute respiratory distress syndrome would mitigate oleic acid (OA)-induced ALI in dogs. METHODS Dogs were randomly assigned to receive intravenous OA to induce ALI (n = 7 for each OA group) or saline as an OA control (n = 6 for each control). Dogs were then mechanically ventilated for 6 hours during which propofol (5 mg/kg/h) or sevoflurane (1.0 minimum alveolar concentration) was administered for sedation. Study end points included PO2/FIO2 ratio, pulmonary arterial pressure, pulmonary edema, histology, and tumor nuclear factor-α. RESULTS In OA-injured animals, oxygenation was worse at 1, 2, 3, and 4 hours after 6-hour mechanical ventilation in sevoflurane-sedated animals compared with propofol-sedated animals, with mean difference (95% confidence interval; propofol minus sevoflurane) of 75 (39-111), 87 (55-119), 66 (44-87), and 67 (27-107) mm Hg for the respective time points. However, sevoflurane reduced the elevated pulmonary arterial pressure and vascular resistance, attenuated pulmonary edema as evidenced by reduced extravascular lung water index, and decreased tumor nuclear factor-α and diffuse alveolar damage score compared with propofol in the OA-injured lungs. CONCLUSIONS When compared with propofol, sevoflurane attenuates OA-induced lung damage. However, despite this effect on lung histology and inflammation, sevoflurane worsened oxygenation in OA-induced ALI, possibly via inhibition of hypoxic pulmonary vasoconstriction.
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Affiliation(s)
- Guizhi Du
- From the *Laboratory of Anesthesia and Critical Care Medicine, Department of Anesthesiology, West China Hospital of Sichuan University, Chengdu, Sichuan, China; †Department of Neurology, The Second People's Hospital of Chengdu, Chengdu, Sichuan, China; and ‡Department of Pharmacy, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, China
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Wang X, Liu C, Wang G. Propofol Protects Rats and Human Alveolar Epithelial Cells Against Lipopolysaccharide-Induced Acute Lung Injury via Inhibiting HMGB1 Expression. Inflammation 2017; 39:1004-16. [PMID: 26956470 DOI: 10.1007/s10753-016-0330-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
High-mobility group box 1 (HMGB1) plays a key role in the development of acute lung injury (ALI). Propofol, a general anesthetic with anti-inflammatory properties, has been suggested to be able to modulate lipopolysaccharide (LPS)-induced ALI. In this study, we investigated the effects of propofol on the expression of HMGB1 in a rat model of LPS-induced ALI. Rats underwent intraperitoneal injection of LPS to mimic sepsis-induced ALI. Propofol bolus (1, 5, or 10 mg/kg) was infused continuously 30 min after LPS administration, followed by infusion at 5 mg/(kg · h) through the left femoral vein cannula. LPS increased wet to dry weight ratio and myeloperoxidase activity in lung tissues and caused the elevation of total protein and cells, neutrophils, macrophages, and neutrophils in bronchoalveolar lavage fluid (BALF). Moreover, HMGB1 and other cytokine levels were increased in BALF and lung tissues and pathological changes of lung tissues were excessively aggravated in rats after LPS administration. Propofol inhibited all the above effects. It also inhibited LPS-induced toll-like receptor (TLR)2/4 protein upexpression and NF-κB activation in lung tissues and human alveolar epithelial cells. Propofol protects rats and human alveolar epithelial cells against HMGB1 expression in a rat model of LPS-induced ALI. These effects may partially result from reductions in TLR2/4 and NF-κB activation.
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Affiliation(s)
- Xiaoyan Wang
- Department of Anesthesiology, Shandong Provincial Hospital Affiliated to Shandong University, No. 324 Jingwu Road, Jinan, Shandong, China
| | - Chengxiao Liu
- Department of Anesthesiology, Shandong Provincial Hospital Affiliated to Shandong University, No. 324 Jingwu Road, Jinan, Shandong, China
| | - Gongming Wang
- Department of Anesthesiology, Shandong Provincial Hospital Affiliated to Shandong University, No. 324 Jingwu Road, Jinan, Shandong, China.
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Propofol inhibits LPS-induced apoptosis in lung epithelial cell line, BEAS-2B. Biomed Pharmacother 2017; 87:180-187. [DOI: 10.1016/j.biopha.2016.12.074] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Revised: 12/11/2016] [Accepted: 12/19/2016] [Indexed: 11/23/2022] Open
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Hodge LM, Creasy C, Carter K, Orlowski A, Schander A, King HH. Lymphatic Pump Treatment as an Adjunct to Antibiotics for Pneumonia in a Rat Model. J Osteopath Med 2015; 115:306-16. [DOI: 10.7556/jaoa.2015.061] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
Background: Lymphatic pump treatment (LPT) is a technique used by osteopathic physicians as an adjunct to antibiotics for patients with respiratory tract infections, and previous studies have demonstrated that LPT reduces bacterial load in the lungs of rats with pneumonia. Currently, it is unknown whether LPT affects drug effcacy.
Objective: To determine whether the combination of antibiotics and LPT would reduce bacterial load in the lungs of rats with acute pneumonia.
Methods: Rats were infected intranasally with 5×107 colony-forming units (CFU) of Streptococcus pneumoniae. At 24, 48, and 72 hours after infection, the rats received no therapy (control), 4 minutes of sham therapy, or 4 minutes of LPT, followed by subcutaneous injection of 40 mg/kg of levofoxacin or sterile phosphate-buffered saline. At 48, 72, and 96 hours after infection, the spleens and lungs were collected, and S pneumoniae CFU were enumerated. Blood was analyzed for a complete blood cell count and leukocyte differential count.
Results: At 48 and 72 hours after infection, no statistically significant differences in pulmonary CFU were found between control, sham therapy, or LPT when phosphate-buffered saline was administered; however, the reduction in CFU was statistically significant in all rats given levofoxacin. The combination of sham therapy and levofoxacin decreased bacterial load at 72 and 96 hours after infection, and LPT and levofoxacin significantly reduced CFU compared with sham therapy and levofoxacin at both time points (P<.05). Colony-forming units were not detected in the spleens at any time. No statistically significant differences in hematologic findings between any treatment groups were found at any time point measured.
Conclusion: The results suggest that 3 applications of LPT induces an additional protective mechanism when combined with levofoxacin and support its use as an adjunctive therapy for the management of pneumonia; however, the mechanism responsible for this protection is unclear.
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Prytherch Z, Bérubé K. Modelling the Human Respiratory System: Approaches for in Vitro Safety Testing and Drug Discovery. HUMAN-BASED SYSTEMS FOR TRANSLATIONAL RESEARCH 2014. [DOI: 10.1039/9781782620136-00066] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Respiratory research can be broken down into two main areas: (i) exposure to airborne substances (basic toxicology assessment); and (ii) respiratory diseases (understanding disease mechanisms and development of new therapeutics, including toxicological assessment). Both have suffered from inadequate and inaccurate models used to predict human toxicological end points. A growing need therefore exists for accurate in vitro models of the respiratory system, which accurately reflect the human lung situation in vivo. Advances in cell culture techniques and accessibility of human cells/tissues have resulted in the development of increasingly in vivo-like respiratory models. This chapter will focus on the development, advantages and disadvantages of these models and what the future holds for in vitro lung toxicology.
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Affiliation(s)
- Zoë Prytherch
- School of Biosciences, Cardiff University The Sir Martin Evan Building Museum Avenue Cardiff CF10 3AX Wales UK
| | - Kelly Bérubé
- School of Biosciences, Cardiff University The Sir Martin Evan Building Museum Avenue Cardiff CF10 3AX Wales UK
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Prytherch ZC, BéruBé KA. A Normal and Biotransforming Model of the Human Bronchial Epithelium for the Toxicity Testing of Aerosols and Solubilised Substances. Altern Lab Anim 2014; 42:377-81. [DOI: 10.1177/026119291404200607] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In this article, we provide an overview of the experimental workflow by the Lung and Particle Research Group at Cardiff University, that led to the development of the two in vitro lung models — the normal human bronchial epithelium (NHBE) model and the lung–liver model, Metabo-Lung™. This work was jointly awarded the 2013 Lush Science Prize. The NHBE model is a three-dimensional, in vitro, human tissue-based model of the normal human bronchial epithelium, and Metabo-Lung involves the co-culture of the NHBE model with primary human hepatocytes, thus permitting the biotransformation of inhaled toxicants in an in vivo-like manner. Both models can be used as alternative test systems that could replace the use of animals in research and development for safety and toxicity testing in a variety of industries (e.g. the pharmaceutical, environmental, cosmetics, and food industries). Metabo-Lung itself is a unique tool for the in vitro detection of toxins produced by reactive metabolites. This 21st century animal replacement model could yield representative in vitro predictions for in vivo toxicity. This advancement in in vitro toxicology relies on filter-well technology that will enable a wide-spectrum of researchers to create viable and economic alternatives for respiratory safety assessment and disease-focused research.
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Affiliation(s)
- Zoë C. Prytherch
- The Lung and Particle Research Group, School of Biosciences, Cardiff University, Cardiff, Wales, UK
| | - Kelly A. BéruBé
- The Lung and Particle Research Group, School of Biosciences, Cardiff University, Cardiff, Wales, UK
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Cavalcanti V, Santos CL, Samary CS, Araújo MN, Heil LBB, Morales MM, Silva PL, Pelosi P, Fernandes FC, Villela N, Rocco PRM. Effects of short-term propofol and dexmedetomidine on pulmonary morphofunction and biological markers in experimental mild acute lung injury. Respir Physiol Neurobiol 2014; 203:45-50. [DOI: 10.1016/j.resp.2014.08.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 08/03/2014] [Accepted: 08/12/2014] [Indexed: 11/30/2022]
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Propofol Attenuates Lipopolysaccharide-Induced Reactive Oxygen Species Production Through Activation of Nrf2/GSH and Suppression of NADPH Oxidase in Human Alveolar Epithelial Cells. Inflammation 2014; 38:415-23. [DOI: 10.1007/s10753-014-0046-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Zhao LL, Hu GC, Zhu SS, Li JF, Liu GJ. Propofol pretreatment attenuates lipopolysaccharide-induced acute lung injury in rats by activating the phosphoinositide-3-kinase/Akt pathway. ACTA ACUST UNITED AC 2014. [PMID: 25387673 PMCID: PMC4244672 DOI: 10.1590/1414-431x20143949] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of this study was to investigate the effect of propofol pretreatment on lipopolysaccharide (LPS)-induced acute lung injury (ALI) and the role of the phosphoinositide-3-kinase/protein kinase B (PI3K/Akt) pathway in this procedure. Survival was determined 48 h after LPS injection. At 1 h after LPS challenge, the lung wet- to dry-weight ratio was examined, and concentrations of protein, tumor necrosis factor-α (TNF-α), and interleukin-6 (IL-6) in bronchoalveolar lavage fluid (BALF) were determined using the bicinchoninic acid method or ELISA. Lung injury was assayed via lung histological examination. PI3K and p-Akt expression levels in the lung tissue were determined by Western blotting. Propofol pretreatment prolonged survival, decreased the concentrations of protein, TNF-α, and IL-6 in BALF, attenuated ALI, and increased PI3K and p-Akt expression in the lung tissue of LPS-challenged rats, whereas treatment with wortmannin, a PI3K/Akt pathway specific inhibitor, blunted this effect. Our study indicates that propofol pretreatment attenuated LPS-induced ALI, partly by activation of the PI3K/Akt pathway.
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Affiliation(s)
- L L Zhao
- Department of Anesthesiology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu Province, China
| | - G C Hu
- Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - S S Zhu
- Department of Anesthesiology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu Province, China
| | - J F Li
- Department of Anesthesiology, Tengzhou Central People's Hospital, Liaocheng, Shandong Province, China
| | - G J Liu
- Department of Anesthesiology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu Province, China
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Isoflurane in Contrast to Propofol Promotes Fluid Extravasation during Cardiopulmonary Bypass in Pigs. Anesthesiology 2013; 119:861-70. [DOI: 10.1097/aln.0b013e31829ab018] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Abstract
Background:
A highly positive intraoperative fluid balance should be prevented as it negatively impacts patient outcome. Analysis of volume-kinetics has identified an increase in interstitial fluid volume after crystalloid fluid loading during isoflurane anesthesia. Isoflurane has also been associated with postoperative hypoxemia and may be associated with an increase in alveolar epithelial permeability, edema formation, and hindered oxygen exchange. In this article, the authors compare fluid extravasation rates before and during cardiopulmonary bypass (CPB) with isoflurane- versus propofol-based anesthesia.
Methods:
Fourteen pigs underwent 2 h of tepid CPB with propofol (P-group; n = 7) or isoflurane anesthesia (I-group; n = 7). Fluid requirements, plasma volume, colloid osmotic pressures in plasma and interstitial fluid, hematocrit levels, and total tissue water content were recorded, and fluid extravasation rates calculated.
Results:
Fluid extravasation rates increased in the I-group from the pre-CPB level of 0.27 (0.13) to 0.92 (0.36) ml·kg−1·min−1, but remained essentially unchanged in the P-group with significant between-group differences during CPB (pb = 0.002). The results are supported by corresponding changes in interstitial colloid osmotic pressure and total tissue water content.
Conclusions:
During CPB, isoflurane, in contrast to propofol, significantly contributes to a general increase in fluid shifts from the intravascular to the interstitial space with edema formation and a possible negative impact on postoperative organ function.
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Zhou GJ, Jiang SY, Zhang M, Gan JX, Jiang GY. Evaluation of the inflammatory response in a two-hit acute lung injury model using [ 18F]FDG microPET. Exp Ther Med 2013; 6:894-898. [PMID: 24137285 PMCID: PMC3797293 DOI: 10.3892/etm.2013.1260] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 08/07/2013] [Indexed: 01/11/2023] Open
Abstract
The aim of this study was to investigate whether a two-hit acute lung injury (ALI) model is better than a one-hit model in simulating ALI, and to evaluate the inflammatory response in the lungs in these two models using micro-positron emission tomography (microPET) with [18F]fluorodeoxyglucose (FDG). Sprague Dawley rats were divided into four groups; rats in the lipopolysaccharide (LPS; n=10) and LPS-HCl (n=10) groups were challenged by the intraperitoneal administration of 5 mg/kg LPS, while rats in the normal saline (NS; n=3) and HCl (n=10) groups received the same volume of normal saline solution. Sixteen hours following the administration, the rats in the HCl and LPS-HCl groups received an acid instillation (IT) of 0.5 ml/kg HCl (pH=1.2), while the rats in the remaining two groups received the same volume of normal saline solution. The mean arterial blood pressure (MAP) and blood gas concentrations were measured in all four groups. MicroPET was performed 4 h following HCl IT and the lungs were excised for histopathological examination. The rats in the LPS-HCl group exhibited a higher arterial PaO2 and a lower arterial PaCO2 compared with the rats in the remaining groups. The MAP decreased markedly in the LPS-HCl group, but remained stable in the LPS, HCl and NS groups. MicroPET results identified that the region of interest ratio in the LPS-HCl group (9.00±1.41) was significantly higher compared with those in the LPS (4.01±0.60) and HCl (3.33±0.55) groups (P<0.01). In addition, histological examination showed that the mean lung injury score in the LPS-HCl group (12.70±0.95) was significantly higher compared with those in the HCl (8.40±1.26) and LPS (7.00±0.82) groups (P<0.01). The present study demonstrates that LPS pretreatment significantly magnifies and prolongs the inflammatory response to subsequent acid IT in the lungs. Moreover, it is simpler to induce ALI using the two-hit model than with the one-hit model, and [18F]FDG microPET is a useful tool for evaluating the inflammatory reaction during ALI.
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Affiliation(s)
- Guang-Ju Zhou
- Department of Emergency Medicine, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, P.R. China
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Sevoflurane, but not propofol, reduces the lung inflammatory response and improves oxygenation in an acute respiratory distress syndrome model. Eur J Anaesthesiol 2013; 30:455-63. [DOI: 10.1097/eja.0b013e32835f0aa5] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Ma L, Wu XY, Zhang LH, Chen WM, Uchiyama A, Mashimo T, Fujino Y. Propofol exerts anti-inflammatory effects in rats with lipopolysaccharide-induced acute lung injury by inhibition of CD14 and TLR4 expression. Braz J Med Biol Res 2013; 46:299-305. [PMID: 23532269 PMCID: PMC3854382 DOI: 10.1590/1414-431x20122379] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Accepted: 12/04/2012] [Indexed: 01/23/2023] Open
Abstract
We investigated the effect of propofol (Prop) administration (10 mg kg-1 h-1, intravenously) on lipopolysaccharide (LPS)-induced acute lung injury and its effect on cluster of differentiation (CD) 14 and Toll-like receptor (TLR) 4 expression in lung tissue of anesthetized, ventilated rats. Twenty-four male Wistar rats were randomly divided into three groups of 8 rats each: control, LPS, and LPS+Prop. Lung injury was assayed via blood gas analysis and lung histology, and tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) levels were determined in bronchoalveolar lavage fluid using ELISA. Real-time polymerase chain reaction was used to detect CD14 and TLR4 mRNA levels, and CD14 and TLR4 protein expression was determined by Western blot. The pathological scores were 1.2 ± 0.9, 3.3 ± 1.1, and 1.9 ± 1.0 for the control, LPS, and LPS+Prop groups, respectively, with statistically significant differences between control and LPS groups (P < 0.05) and between LPS and LPS+Prop groups (P < 0.05). The administration of LPS resulted in a significant increase in TNF-α and IL-1β levels, 7- and 3.5-fold, respectively (P < 0.05), while treatment with propofol partially blunted the secretion of both cytokines (P < 0.05). CD14 and TLR4 mRNA levels were increased in the LPS group (1.48 ± 0.05 and 1.26 ± 0.03, respectively) compared to the control group (1.00 ± 0.20 and 1.00 ± 0.02, respectively; P < 0.05), while propofol treatment blunted this effect (1.16 ± 0.05 and 1.12 ± 0.05, respectively; P < 0.05). Both CD14 and TLR4 protein levels were elevated in the LPS group compared to the control group (P < 0.05), while propofol treatment partially decreased the expression of CD14 and TLR4 protein versus LPS alone (P < 0.05). Our study indicates that propofol prevents lung injury, most likely by inhibition of CD14 and TLR4 expression.
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Affiliation(s)
- Ling Ma
- Department of Anesthesiology, Shengjing Hospital, China Medical University, Shenyang, China.
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Le-Dong NN, Duong-Quy S, Bei Y, Hua-Huy T, Chen W, Dinh-Xuan AT. Measuring exhaled nitric oxide in animal models: methods and clinical implications. J Breath Res 2012; 6:047001. [PMID: 22990104 DOI: 10.1088/1752-7155/6/4/047001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Animal models such as rats and mice are useful for studying the multiple roles of nitric oxide (NO) in various respiratory disorders. The production of NO is catalyzed by the three isoforms of the enzymes (NO synthases; NOS). Indirect assessment of NOS gene or protein expression only provides partial information on the role of NO in health and lung disease. NO can also be measured in exhaled air by invasive or non-invasive approaches as a direct and quantitative marker of NO production in animal models. Whilst addressing the different methods of exhaled NO analysis in small animals (rats and mice), this review also focuses on the possible clinical implications, and discusses the advantages and limitations of these methods.
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Affiliation(s)
- Nhât-Nam Le-Dong
- Paris Descartes University, Medical School, Assistance Publique Hôpitaux de Paris, Service de Physiologie-Explorations Fonctionnelles. Hôpital Cochin, 27 rue du faubourg Saint-Jacques, 75014 Paris, France
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Acute lung injury and acute respiratory distress syndrome: experimental and clinical investigations. J Geriatr Cardiol 2012; 8:44-54. [PMID: 22783284 PMCID: PMC3390060 DOI: 10.3724/sp.j.1263.2011.00044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2011] [Revised: 03/12/2011] [Accepted: 03/19/2011] [Indexed: 01/11/2023] Open
Abstract
Acute lung injury (ALI) or acute respiratory distress syndrome (ARDS) can be associated with various disorders. Recent investigation has involved clinical studies in collaboration with clinical investigators and pathologists on the pathogenetic mechanisms of ALI or ARDS caused by various disorders. This literature review includes a brief historical retrospective of ALI/ARDS, the neurogenic pulmonary edema due to head injury, the long-term experimental studies and clinical investigations from our laboratory, the detrimental role of NO, the risk factors, and the possible pathogenetic mechanisms as well as therapeutic regimen for ALI/ARDS.
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Beneficial Effect of the Polysaccharides from Bupleurum smithii var. parvifolium on “Two-Hit” Acute Lung Injury in Rats. Inflammation 2012; 35:1715-22. [DOI: 10.1007/s10753-012-9489-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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23
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LI ZHEN, ZHAO GUODONG, ZHOU GUOBIN, WANG YAN, WANG QING, JI JINQUAN, WANG ZHIPENG. Inhibition of S100A9 expression by propofol in monocytes of rats with endotoxemia. Mol Med Rep 2012; 6:657-61. [DOI: 10.3892/mmr.2012.957] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Accepted: 05/23/2012] [Indexed: 11/06/2022] Open
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Su CF, Kao SJ, Chen HI. Acute respiratory distress syndrome and lung injury: Pathogenetic mechanism and therapeutic implication. World J Crit Care Med 2012; 1:50-60. [PMID: 24701402 PMCID: PMC3953859 DOI: 10.5492/wjccm.v1.i2.50] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Revised: 10/14/2011] [Accepted: 03/10/2012] [Indexed: 02/06/2023] Open
Abstract
To review possible mechanisms and therapeutics for acute lung injury (ALI) and acute respiratory distress syndrome (ARDS). ALI/ARDS causes high mortality. The risk factors include head injury, intracranial disorders, sepsis, infections and others. Investigations have indicated the detrimental role of nitric oxide (NO) through the inducible NO synthase (iNOS). The possible therapeutic regimen includes extracorporeal membrane oxygenation, prone position, fluid and hemodynamic management and permissive hypercapnic acidosis etc. Other pharmacological treatments are anti-inflammatory and/or antimicrobial agents, inhalation of NO, glucocorticoids, surfactant therapy and agents facilitating lung water resolution and ion transports. β-adrenergic agonists are able to accelerate lung fluid and ion removal and to stimulate surfactant secretion. In conscious rats, regular exercise training alleviates the endotoxin-induced ALI. Propofol and N-acetylcysteine exert protective effect on the ALI induced by endotoxin. Insulin possesses anti-inflammatory effect. Pentobarbital is capable of reducing the endotoxin-induced ALI. In addition, nicotinamide or niacinamide abrogates the ALI caused by ischemia/reperfusion or endotoxemia. This review includes historical retrospective of ALI/ARDS, the neurogenic pulmonary edema due to head injury, the detrimental role of NO, the risk factors, and the possible pathogenetic mechanisms as well as therapeutic regimen for ALI/ARDS.
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Affiliation(s)
- Chain-Fa Su
- Chain-Fa Su, Department of Neurosurgery, Tzu Chi University Hospital, Hualien 97004, Taiwan, China
| | - Shang Jyh Kao
- Chain-Fa Su, Department of Neurosurgery, Tzu Chi University Hospital, Hualien 97004, Taiwan, China
| | - Hsing I Chen
- Chain-Fa Su, Department of Neurosurgery, Tzu Chi University Hospital, Hualien 97004, Taiwan, China
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Propofol attenuates hypoxia-induced apoptosis in alveolar epithelial type II cells through down-regulating hypoxia-inducible factor-1α. Injury 2012; 43:279-83. [PMID: 21703615 DOI: 10.1016/j.injury.2011.05.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2010] [Accepted: 05/25/2011] [Indexed: 02/02/2023]
Abstract
To investigate the protective effect of propofol against hypoxia-induced apoptosis in alveolar epithelial type II (ATII) cells and to explore whether hypoxia-inducible factor-1α (HIF-1α) is involved in this process. Primary cultured rat ATII cells were randomly assigned to one of the following four groups, namely, Group C: treated under normoxia (21% O(2)), Group P(20): treated with propofol (20 μM) under normoxia (21% O(2)), Group H: treated under hypoxia (5% O(2)), and Group P(20)-H: pre-treated with propofol (20 μM) before hypoxia exposure (5% O(2)). Apoptosis in ATII cells was detected by Annexin V-FITC binding using FACScan. Expressions of HIF-1α and Bnip3L mRNA and protein in ATII cells were examined by quantitative real-time polymerase chain reaction and Western blotting analysis, respectively. Hypoxia exposure (Group H) significantly increased HIF-1α protein expression (P<0.01 vs. Group C) and significantly promoted apoptosis in ATII cells (P<0.01 vs. Group C). Expression of Bnip3L, a target gene of HIF-1α, was also significantly increased at both mRNA and protein levels in response to hypoxia (P<0.01 vs. Group C). Pretreatment with propofol (20 μM, Group P(20)-H) significantly decreased HIF-1α protein expression (P<0.01 vs. Group H) and significantly inhibited apoptosis in ATII cells (P<0.01 vs. Group H), accompanied by decreased expression of Bnip3L at both mRNA and protein levels (P<0.01 vs. Group H). Propofol (20 μM) can attenuate hypoxia-induced apoptosis in ATII cells and inhibit HIF-1α-hypoxia responsive element (HRE) axis involving Bnip3L, which may partly mediate the cytoprotective effects of propofol.
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Hodge LM. Osteopathic lymphatic pump techniques to enhance immunity and treat pneumonia. INT J OSTEOPATH MED 2012; 15:13-21. [PMID: 22977459 DOI: 10.1016/j.ijosm.2011.11.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Pneumonia is a common cause of morbidity and mortality worldwide. While antibiotics are generally effective for the treatment of infection, the emergence of resistant strains of bacteria threatens their success. The osteopathic medical profession has designed a set of manipulative techniques called lymphatic pump techniques (LPT), to enhance the flow of lymph through the lymphatic system. Clinically, LPT is used to treat infection and oedemaand might be an effective adjuvant therapy in patients with pneumonia.The immune system uses the lymphatic and blood systems to survey to rid the body of pathogens; however, only recently have the effects of LPT on the lymphatic and immune systems been investigated. This short review highlightsclinical and basic science research studies that support the use of LPT to enhance the lymphatic and immune systems and treat pneumonia, and discusses the potential mechanisms by which LPT benefits patients with pneumonia.
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Affiliation(s)
- Lisa M Hodge
- Osteopathic Research Center, University of North Texas Health Science Center Fort Worth, Texas
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Anti-inflammatory and anticoagulative effects of paeonol on LPS-induced acute lung injury in rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2012; 2012:837513. [PMID: 22454687 PMCID: PMC3291481 DOI: 10.1155/2012/837513] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Revised: 10/27/2011] [Accepted: 10/27/2011] [Indexed: 01/11/2023]
Abstract
Paeonol is an active component of Moutan Cortex Radicis and is widely used as an analgesic, antipyretic, and anti-inflammatory agent in traditional Chinese medicine. We wanted to determine the role of paeonol in treating adult respiratory distress syndrome (ARDS). We established an acute lung injury (ALI) model in Sprague-Dawley rats, which was similar to ARDS in humans, using intratracheal administration of lipopolysaccharide (LPS). The intraperitoneal administration of paeonol successfully reduced histopathological scores and attenuated myeloperoxidase-reactive cells as an index of polymorphonuclear neutrophils infiltration and also reduces inducible nitric oxide synthase expression in the lung tissue, at 16 h after LPS administration. In addition, paeonol reduced proinflammatory cytokines in bronchoalveolar lavage fluid, including tumor-necrosis factor-α, interleukin-1β, interleukin-6, and plasminogen-activated inhibition factor-1. These results indicated that paeonol successfully attenuates inflammatory and coagulation reactions to protect against ALI.
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Vasileiou I, Kalimeris K, Nomikos T, Xanthopoulou MN, Perrea D, Agrogiannis G, Nakos G, Kostopanagiotou G. Propofol Prevents Lung Injury Following Intestinal Ischemia-Reperfusion. J Surg Res 2012; 172:146-52. [DOI: 10.1016/j.jss.2010.07.034] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2010] [Revised: 06/24/2010] [Accepted: 07/13/2010] [Indexed: 11/16/2022]
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Prytherch Z, Job C, Marshall H, Oreffo V, Foster M, BéruBé K. Tissue-Specific stem cell differentiation in an in vitro airway model. Macromol Biosci 2011; 11:1467-77. [PMID: 21994115 DOI: 10.1002/mabi.201100181] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2011] [Revised: 07/21/2011] [Indexed: 11/06/2022]
Abstract
The respiratory tract is the primary site of exposure to airborne compounds, with the bronchial epithelium providing one of the first lines of defence. A growing need exists for an accurate in vitro model of the bronchial epithelium. Here, normal human bronchial epithelial (NHBE) cells cultured at an air/liquid interface create a fully differentiated, in-vivo-like model of the human bronchial epithelium. Developmental characterisation includes (i) trans-epithelial electrical resistance, (ii) morphology and (iii) bronchial cell specific stains/markers. It is concluded that the basal/progenitor cells create a pseudo-stratified, mucociliary NHBE model containing basal, serous, Clara, goblet and ciliated cells, reflective of the normal human bronchial epithelium (days 24-33 ALI culture).
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Affiliation(s)
- Zoë Prytherch
- School of Biosciences, Cardiff University, Cardiff, UK.
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Matute-Bello G, Downey G, Moore BB, Groshong SD, Matthay MA, Slutsky AS, Kuebler WM. An official American Thoracic Society workshop report: features and measurements of experimental acute lung injury in animals. Am J Respir Cell Mol Biol 2011; 44:725-38. [PMID: 21531958 PMCID: PMC7328339 DOI: 10.1165/rcmb.2009-0210st] [Citation(s) in RCA: 1294] [Impact Index Per Article: 99.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Acute lung injury (ALI) is well defined in humans, but there is no agreement as to the main features of acute lung injury in animal models. A Committee was organized to determine the main features that characterize ALI in animal models and to identify the most relevant methods to assess these features. We used a Delphi approach in which a series of questionnaires were distributed to a panel of experts in experimental lung injury. The Committee concluded that the main features of experimental ALI include histological evidence of tissue injury, alteration of the alveolar capillary barrier, presence of an inflammatory response, and evidence of physiological dysfunction; they recommended that, to determine if ALI has occurred, at least three of these four main features of ALI should be present. The Committee also identified key "very relevant" and "somewhat relevant" measurements for each of the main features of ALI and recommended the use of least one "very relevant" measurement and preferably one or two additional separate measurements to determine if a main feature of ALI is present. Finally, the Committee emphasized that not all of the measurements listed can or should be performed in every study, and that measurements not included in the list are by no means "irrelevant." Our list of features and measurements of ALI is intended as a guide for investigators, and ultimately investigators should choose the particular measurements that best suit the experimental questions being addressed as well as take into consideration any unique aspects of the experimental design.
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Yeh CH, Cho W, So E, Chu CC, Lin MC, Wang JJ, Hsing CH. Propofol inhibits lipopolysaccharide-induced lung epithelial cell injury by reducing hypoxia-inducible factor-1α expression. Br J Anaesth 2011; 106:590-599. [DOI: 10.1093/bja/aer005] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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32
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Propofol in bronchoalveolar lavage during anaesthesia. Clin Chim Acta 2011; 412:190-3. [DOI: 10.1016/j.cca.2010.10.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2010] [Revised: 10/04/2010] [Accepted: 10/04/2010] [Indexed: 11/20/2022]
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Valenza F, Chevallard G, Fossali T, Salice V, Pizzocri M, Gattinoni L. Management of mechanical ventilation during laparoscopic surgery. Best Pract Res Clin Anaesthesiol 2010; 24:227-41. [PMID: 20608559 DOI: 10.1016/j.bpa.2010.02.002] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Laparoscopy is widely used in the surgical treatment of a number of diseases. Its advantages are generally believed to lie on its minimal invasiveness, better cosmetic outcome and shorter length of hospital stay based on surgical expertise and state-of-the-art equipment. Thousands of laparoscopic surgical procedures performed safely prove that mechanical ventilation during anaesthesia for laparoscopy is well tolerated by a vast majority of patients. However, the effects of pneumoperitoneum are particularly relevant to patients with underlying lung disease as well as to the increasing number of patients with higher-than-normal body mass index. Moreover, many surgical procedures are significantly longer in duration when performed with laparoscopic techniques. Taken together, these factors impose special care for the management of mechanical ventilation during laparoscopic surgery. The purpose of the review is to summarise the consequences of pneumoperitoneum on the standard monitoring of mechanical ventilation during anaesthesia and to discuss the rationale of using a protective ventilation strategy during laparoscopic surgery. The consequences of chest wall derangement occurring during pneumoperitoneum on airway pressure and central venous pressure, together with the role of end-tidal-CO2 monitoring are emphasised. Ventilatory and non-ventilatory strategies to protect the lung are discussed.
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Affiliation(s)
- Franco Valenza
- Università degli Studi di Milano, Dipartimento di Anestesiologia, Terapia Intensiva e Scienze Dermatologiche, Via Festa del Perdono n.7, Milano, Italy.
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Ma L, Wu X, Chen W, Fujino Y. Propofol has anti-inflammatory effects on alveolar type II epithelial cells. Acta Anaesthesiol Scand 2010; 54:362-9. [PMID: 19764911 DOI: 10.1111/j.1399-6576.2009.02127.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
BACKGROUND We investigated whether lipopolysaccharide (LPS) induced inflammation in alveolar epithelial type II (ATII) cells is through cluster of differentiation 14 (CD14) and Toll-like receptor 4 (TLR4) and the effect of different dosages of propofol on the inflammation in primary cultured rat ATII cells. METHODS Cultured ATII cells were randomly assigned to one of the following five groups: Group C: untreated group (control) cultured in the absence of propofol and LPS; Group LPS: treated with 1 microg/ml LPS; Group P1: treated with 1 microg/ml LPS and 25 microM propofol; Group P2: treated with 1 microg/ml LPS and 50 microM propofol; Group P3: treated with 1 microg/ml LPS and 100 microM propofol. ATII cells in all groups were cultured at 37 degrees C for 3 h. CD14 and TLR4 mRNA was detected using real-time polymerase chain reaction. Western blot was used to detect CD14 and TLR4 protein expression. CD14 and TLR4 expression on the ATII cells was imaged using immunofluorescence. Tumor necrosis factor-alpha (TNF-alpha) production was determined using an ELISA kit. RESULTS LPS stimulation resulted in an increased CD14 and TLR4 expression and increased TNF-alpha production in ATII cells. Propofol, at concentrations > or = 50 microM, significantly (P<0.05) and dose-dependently decreased CD14 and TLR4 mRNA expression and protein expression in ATII cells. This was accompanied by a decrease in TNF-alpha production (P<0.05). CONCLUSION These results suggest that propofol, at clinically relevant concentrations, can reduce inflammatory responses in LPS-induced ATII cells injury through downregulation of CD14 and TLR4 expression.
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Affiliation(s)
- L Ma
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang 110004, China
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Haitsma JJ, Lachmann B, Papadakos PJ. Additives in intravenous anesthesia modulate pulmonary inflammation in a model of LPS-induced respiratory distress. Acta Anaesthesiol Scand 2009; 53:176-82. [PMID: 19175577 DOI: 10.1111/j.1399-6576.2008.01844.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND It has been suggested that propofol with ethylenediaminetetraacetic acid (EDTA) can modulate the systemic inflammatory response. Prolonged higher levels of pulmonary inflammation are associated with poor outcome of patients with acute lung injury. In the present study, we hypothesized that pulmonary inflammation could be modulated by propofol with EDTA compared with propofol with sulfite. METHODS Respiratory distress was induced in rats (n=25) by intratracheal nebulization of lipopolysaccharide (LPS). After 24 h, animals were randomized to either propofol with EDTA (Propofol(EDTA)), propofol with sulfite (Propofol(sulfite)) or ketamine/midazolam (Ket/Mid); control animals received saline (n=30). Animals were ventilated for 4 h and blood gases were measured hourly. Bronchoalveolar lavage (BAL) was performed for cytokine analysis of: tumor necrosis factor (TNF), interleukin (IL)-6 and macrophage inflammatory protein (MIP)-2. RESULTS LPS led to increased pulmonary inflammation in all groups compared with the control groups. Gas exchange deteriorated over time only in the LPS Propofol(sulfite) group and was significantly lower than the Ket/Mid group. Only IL-6 was significantly higher in the LPS Propofol(sulfite) group compared with both the Ket/Mid group and the Propofol(EDTA) group. CONCLUSION Pulmonary IL-6 can be modulated by additives in systemic anesthesia. IMPLICATION STATEMENT This study demonstrates that pulmonary inflammation caused by direct lung injury can be modulated by intravenous anesthesia used in critically ill patients.
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Affiliation(s)
- J J Haitsma
- Departments of Anesthesiology, Surgery and Neurosurgery, University of Rochester, School of Medicine and Dentistry, Rochester, NY, USA
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Effects of propofol on the leukocyte nitric oxide pathway: in vitro and ex vivo studies in surgical patients. Naunyn Schmiedebergs Arch Pharmacol 2007; 376:331-9. [DOI: 10.1007/s00210-007-0220-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2007] [Accepted: 11/08/2007] [Indexed: 10/22/2022]
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