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Westhoff D, Engelen-Lee JY, Hoogland ICM, Aronica EMA, van Westerloo DJ, van de Beek D, van Gool WA. Systemic infection and microglia activation: a prospective postmortem study in sepsis patients. IMMUNITY & AGEING 2019; 16:18. [PMID: 31384283 PMCID: PMC6664744 DOI: 10.1186/s12979-019-0158-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 07/17/2019] [Indexed: 12/16/2022]
Abstract
Background Systemic infection is associated with long-term cognitive deficits and functional decline. In this study we hypothesized that severe systemic inflammation leads to a neuroinflammatory response that is characterized by microglial activation, and that these effects might be more pronounced in patients using medication with anticholinergic side-effects. Methods Based on the results of a pilot study in 8 patients, we assessed the number of MHC-II and CD-68 positive cells by immunohistochemistry and compared the number of microglia in specific brain regions of 16 well-characterized patients with septic shock and 15 controls. Results In the pilot study, patients with sepsis tended to have higher density of MHC-II and CD-68 positive microglia in the basal ganglia (putamen, caudate nucleus and globus pallidus) and of MHC-II positive microglia in the hippocampus. In the validation study, patients with sepsis had a significantly higher number of CD-68 positive cells in hippocampus (1.5 fold; p = 0.012), putamen (2.2 fold; p = 0.008) and cerebellum (2.5 fold; p = 0.011) than control patients. The density of MHC-II positive microglia was similar between sepsis and control groups. There was no consistent correlation between microglia counts and anti-cholinergic activity drugs score. Conclusion In patients who die during septic shock, severe systemic inflammation is accompanied by localized and strong upregulation of CD-68 positive microglia, but not of MHC-II positive microglia. We identified regional differences in the brain with increased microglial activation in putamen, hippocampus and cerebellum.
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Affiliation(s)
- D Westhoff
- 1Department of Neurology, Amsterdam Neuroscience, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - J Y Engelen-Lee
- 1Department of Neurology, Amsterdam Neuroscience, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - I C M Hoogland
- 1Department of Neurology, Amsterdam Neuroscience, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - E M A Aronica
- 3Department of Neuropathology, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, Netherlands.,4Swammerdam Institute for Life Sciences, Center for Neuroscience, University of Amsterdam, Amsterdam, Netherlands
| | - D J van Westerloo
- 2Department of Intensive Care medicine, Leiden University Medical Center, Leiden, Netherlands
| | - D van de Beek
- 1Department of Neurology, Amsterdam Neuroscience, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - W A van Gool
- 1Department of Neurology, Amsterdam Neuroscience, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, Netherlands
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Millan B, Park H, Hotte N, Mathieu O, Burguiere P, Tompkins TA, Kao D, Madsen KL. Fecal Microbial Transplants Reduce Antibiotic-resistant Genes in Patients With Recurrent Clostridium difficile Infection. Clin Infect Dis 2016; 62:1479-1486. [PMID: 27025836 PMCID: PMC4885654 DOI: 10.1093/cid/ciw185] [Citation(s) in RCA: 133] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 02/15/2016] [Indexed: 01/13/2023] Open
Abstract
Patients with recurrent C. difficile infection harbor large numbers of microbes with antibiotic resistance genes. Fecal microbial transplantation eradicates pathogenic organisms and eliminates antibiotic-resistance genes suggesting this may be a viable treatment option to eradicate multidrug resistant bacteria from patients. Background. Recurrent Clostridium difficile infection (RCDI) is associated with repeated antibiotic treatment and the enhanced growth of antibiotic-resistant microbes. This study tested the hypothesis that patients with RCDI would harbor large numbers of antibiotic-resistant microbes and that fecal microbiota transplantation (FMT) would reduce the number of antibiotic-resistant genes. Methods. In a single center study, patients with RCDI (n = 20) received FMT from universal donors via colonoscopy. Stool samples were collected from donors (n = 3) and patients prior to and following FMT. DNA was extracted and shotgun metagenomics performed. Results as well as assembled libraries from a healthy cohort (n = 87) obtained from the Human Microbiome Project were aligned against the NCBI bacterial taxonomy database and the Comprehensive Antibiotic Resistance Database. Results were corroborated through a DNA microarray containing 354 antibiotic resistance (ABR) genes. Results. RCDI patients had a greater number and diversity of ABR genes compared with donors and healthy controls. Beta-lactam, multidrug efflux pumps, fluoroquinolone, and antibiotic inactivation ABR genes were increased in RCDI patients, although donors primarily had tetracycline resistance. RCDI patients were dominated by Proteobacteria with Escherichia coli and Klebsiella most prevalent. FMT resulted in a resolution of symptoms that correlated directly with a decreased number and diversity of ABR genes and increased Bacteroidetes and Firmicutes with reduced Proteobacteria. ABR gene profiles were maintained in recipients for up to a year following FMT. Conclusions. RCDI patients have increased numbers of antibiotic-resistant organisms. FMT is effective in the eradication of pathogenic antibiotic-resistant organisms and elimination of ABR genes.
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Affiliation(s)
- Braden Millan
- Department of Medicine, University of Alberta, Edmonton
| | - Heekuk Park
- Department of Medicine, University of Alberta, Edmonton
| | - Naomi Hotte
- Department of Medicine, University of Alberta, Edmonton
| | | | | | | | - Dina Kao
- Department of Medicine, University of Alberta, Edmonton
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Rubenfeld GD. Who cares about preventing acute respiratory distress syndrome? Am J Respir Crit Care Med 2015; 191:255-60. [PMID: 25478722 DOI: 10.1164/rccm.201408-1574cp] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Acute respiratory distress syndrome (ARDS) is a common, lethal, and morbid respiratory complication primarily seen in the setting of major trauma and infection. Despite advances in mechanical ventilation for ARDS, many interventions have not been successful in reducing mortality. Recent grant announcements and ongoing clinical trials indicate an interest in preventing ARDS. This Perspective challenges some of the basic assumptions of ARDS prevention and preventive care in the intensive care unit. ARDS is an organ function surrogate outcome. Studies of surrogate outcomes in medicine have repeatedly failed to show an association with patient-centered outcomes that might include mortality, quality of life, patient satisfaction, and cost. Organ failure surrogate outcomes in critical care, including oxygenation, cardiac output, and blood pressure, have similarly failed to show a consistent association with patient-centered benefit. Trials designed to demonstrate an effect on surrogate outcomes will rarely be able to demonstrate small, but important, harms so that the net benefit of prevention can be calculated. This will leave clinicians with insufficient information to balance the unknown benefits of ARDS prevention with imprecisely estimated costs or risks of prevention. Because ARDS diagnosis relies on oxygenation and the chest radiograph that might be directly influenced by the prophylactic intervention, studies must be designed to insure that the prevention is not merely cosmetic. Strategies that prevent ARDS need to be tested in trials sufficiently powered to demonstrate their patient-centered costs, benefits and harms before widespread adoption.
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Affiliation(s)
- Gordon D Rubenfeld
- Trauma, Emergency and Critical Care Program, Sunnybrook Health Sciences Centre, and Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada
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4
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Haas LEM, de Rijk NX, Thijsen SFT. Human metapneumovirus infections on the ICU: a report of three cases. Ann Intensive Care 2012; 2:30. [PMID: 22812412 PMCID: PMC3519638 DOI: 10.1186/2110-5820-2-30] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2011] [Accepted: 04/30/2012] [Indexed: 11/23/2022] Open
Abstract
Although human metapneumovirus (hMPV) is primarily known as a causative agent of respiratory tract infections in children, the virus also can cause respiratory infections in adults. hMPV infections tend to be mild and are self-limiting, but the infections can be severe in the elderly and immunocompromised patients. Because hMPV infection is quite common, it should be considered in every patient with respiratory failure in the intensive care unit (ICU). We describe three adult patients, including a young pregnant woman, with hMPV infection who required admission to our ICU. Two of them developed respiratory failure with indication for mechanical ventilation.
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Affiliation(s)
- Lenneke E M Haas
- Department of Intensive Care Medicine, Diakonessenhuis, Utrecht, The Netherlands.
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Selective decontamination of the digestive tract reduces pneumonia and mortality. Crit Care Res Pract 2010; 2010:501031. [PMID: 20981328 PMCID: PMC2958652 DOI: 10.1155/2010/501031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2010] [Accepted: 09/20/2010] [Indexed: 11/20/2022] Open
Abstract
Selective decontamination of the digestive tract (SDD) has been subject of numerous randomized controlled trials in critically ill patients. Almost all clinical trials showed SDD to prevent pneumonia. Nevertheless, SDD has remained a controversial strategy. One reason for why clinicians remained reluctant to implement SDD into daily practice could be that mortality was reduced in only 2 trials. Another reason could be the heterogeneity of trials of SDD. Indeed, many different prophylactic antimicrobial regimes were tested, and dissimilar diagnostic criteria for pneumonia were applied amongst the trials. This heterogeneity impeded interpretation and comparison of trial results. Two other hampering factors for implementation of SDD have been concerns over the risk of antimicrobial resistance and fear for escalation of costs associated with the use of prophylactic antimicrobials. This paper describes the concept of SDD, summarizes the results of published trials of SDD in mixed medical-surgical intensive care units, and rationalizes the risk of antimicrobial resistance and rise of costs associated with this potentially life-saving preventive strategy.
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Symbiotics as a preventive measure against ventilator-associated pneumonia. Crit Care Med 2010; 38:1506-7; author reply 1507. [PMID: 20502161 DOI: 10.1097/ccm.0b013e3181d8c473] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Ventilator-associated pneumonia prevention: WHAP, positive end-expiratory pressure, or both?*. Crit Care Med 2008; 36:2441-2. [DOI: 10.1097/ccm.0b013e31817c0dc6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Veelo DP, Bulut T, Dongelmans DA, Korevaar JC, Spronk PE, Schultz MJ. The incidence and microbial spectrum of ventilator-associated pneumonia after tracheotomy in a selective decontamination of the digestive tract-setting. J Infect 2007; 56:20-6. [PMID: 18037493 DOI: 10.1016/j.jinf.2007.10.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2007] [Revised: 10/10/2007] [Accepted: 10/11/2007] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Tracheotomy is considered to be an independent risk factor for ventilator-associated pneumonia (VAP). Antimicrobial prophylaxis, in particular with coverage of Pseudomonas aeruginosa, is presently advocated. Selective decontamination of the digestive tract (SDD) aims to prevent VAP in critically ill patients, including those after tracheotomy. We determined the incidence and microbial spectrum of VAP after tracheotomy in a SDD-setting. METHODS Retrospective analysis of 231 tracheotomized patients during a 2-year period. RESULTS Thirteen patients (5.6%) developed VAP. The median [IQR] day of onset was 8.0 [3.0-10.5] days after tracheotomy. The most predominant causative pathogen was Methicillin-sensitive Staphylococcus aureus (MSSA). Timing of tracheotomy was not different between patients developing VAP and those who did not. The type of tracheotomy (percutaneous or surgical, 84.6% versus 15.4%) had no significant influence on the incidence of VAP. CONCLUSIONS The incidence of VAP after tracheotomy in a SDD-setting is low, with MSSA as the predominant causative pathogen. Accordingly, if antimicrobial prophylaxis is considered, it may be advisable to cover MSSA in an SDD-setting.
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Affiliation(s)
- Denise P Veelo
- Department of Intensive Care Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
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Veelo DP, Dongelmans DA, Phoa KN, Spronk PE, Schultz MJ. Tracheostomy: current practice on timing, correction of coagulation disorders and peri-operative management - a postal survey in the Netherlands. Acta Anaesthesiol Scand 2007; 51:1231-6. [PMID: 17850564 DOI: 10.1111/j.1399-6576.2007.01430.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Several factors may delay tracheostomy. As many critically ill patients either suffer from coagulation abnormalities or are being treated with anticoagulants, fear of bleeding complications during the procedure may also delay tracheostomy. It is unknown whether such (usually mild) coagulation abnormalities are corrected first and to what extent. The purpose of this study was to ascertain current practice of tracheostomy in the Netherlands with regard to timing, pre-operative correction of coagulation disorders and peri-/intra-operative measures. METHODS In October 2005, a questionnaire was sent to the medical directors of all non-pediatric ICUs with >/=5 beds suitable for mechanical ventilation in the Netherlands. RESULTS A response was obtained from 44 (64%) out of 69 ICUs included in the survey. Seventy-five percent of patients receive tracheostomy within 2 days after the decision to proceed with a tracheostomy. Reasons indicated as frequent causes for delay were most often logistical factors. A heterogeneous attitude exists regarding values of coagulation parameters acceptable to perform tracheostomy. Fifty percent of the respondents have no guideline on correction of coagulation disorders or anticoagulant therapy before tracheostomy. Antimicrobial prophylaxis is almost never administered before tracheostomy. Forty-eight percent mentioned always using endoscopic guidance and 66% of ICUs only perform chest radiography on indication. CONCLUSIONS There is a high variation in peri- and intra-operative practice of tracheostomy in the Netherlands. Especially on the subject of coagulation and tracheostomy there are different opinions and protocols are often lacking.
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Affiliation(s)
- D P Veelo
- Department of Intensive Care Medicine, Academic Medical Center, University of Amsterdam, Amsterdam.
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Schultz MJ, Spronk PE. Positive blood cultures or Gram-negative pathogens with ventilator-associated pneumonia: What’s the real killer?*. Crit Care Med 2007; 35:2215-6. [PMID: 17713371 DOI: 10.1097/01.ccm.0000281520.94595.c7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Spronk PE, Schultz MJ. Slurping at the inside—Do not forget to clean the outside too. Crit Care Med 2007; 35:1803; author reply 1803-4. [PMID: 17581384 DOI: 10.1097/01.ccm.0000269340.32864.38] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Horton JW, Maass DL, White J, Minei JP. Reducing susceptibility to bacteremia after experimental burn injury: a role for selective decontamination of the digestive tract. J Appl Physiol (1985) 2007; 102:2207-16. [PMID: 17272403 DOI: 10.1152/japplphysiol.01365.2005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We proposed that selective decontamination of the digestive tract (SDD) initiated after experimental burn injury would decrease myocardial inflammation and dysfunction after a second insult such as septic challenge. Rats were divided into eight experimental groups. Groups included sham burn plus sham sepsis, burn alone, sepsis alone, and burn plus sepsis given either water by oral gavage for 5 days after burn (or sham burn) or given oral antibiotics (polymyxin E, 15 mg; tobramycin, 6 mg; 5-flucytosin, 100 mg given by oral gavage, 2x daily for 5 days after burn or sham burn). Cardiac function and inflammation were studied 24 h after septic challenge. In the absence of SDD, burn alone, sepsis alone, or burn plus septic challenge promoted cardiac myocyte secretion of TNF-alpha (burn, 174+/-11; sepsis, 269+/-19; burn+sepsis, 453+/-14 pg/ml), IL-1beta (burn, 35+/-2; sepsis, 29+/-1; burn+sepsis, 48+/-7 pg/ml), and IL-6 (burn, 143+/-18; sepsis, 116+/-3; burn+sepsis, 248+/-12 pg/ml) compared with values measured in sham (TNF-alpha, 3+/-1; IL-1beta, 1+/-0.4; IL-6, 6+/-1.5 pg/ml) (P<0.05). Impaired ventricular contraction and relaxation responses were evident in the absence of SDD [burn+sepsis: left ventricular pressure (LVP), 65+/-4 mmHg; rate of LVP rise (+dP/dt), 1,320+/-131 mmHg/s compared with values measured in sham: LVP, 96+/-4 mmHg; +dP/dt, 2,095+/-99 mmHg/s, P<0.05]. SDD treatment of experimental burn attenuated septic challenge-related inflammatory responses and improved myocardial contractile responses, producing cardiac TNF-alpha, IL-1beta, and IL-6 levels, LVP, +dP/dt, and rate of LVP fall (-dP/dt) values that were significantly better (P<0.05) than values measured in burn plus sepsis in the absence of SDD. This work confirms that endogenous gut organisms contribute to sensitivity to subsequent infectious challenge.
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Affiliation(s)
- Jureta W Horton
- Department of Surgery, University of Texas Southwestern Medical Center, 5325 Harry Hines Blvd., Dallas, TX 75390, USA.
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Oda S, Hirasawa H, Shiga H, Matsuda K, Nakamura M, Watanabe E, Moriguchi T. Management of intra-abdominal hypertension in patients with severe acute pancreatitis with continuous hemodiafiltration using a polymethyl methacrylate membrane hemofilter. Ther Apher Dial 2005; 9:355-61. [PMID: 16076382 DOI: 10.1111/j.1744-9987.2005.00297.x] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
To evaluate, with a prospective observational study, whether continuous hemodiafiltration using a polymethyl methacrylate membrane hemofilter (PMMA-CHDF) is effective for prevention and treatment of intra-abdominal hypertension (IAH) and abdominal compartment syndrome (ACS) on patients with severe acute pancreatitis (SAP). The study was carried out in the general intensive care unit (ICU) of a university hospital. Seventeen consecutive patients with SAP were treated in the intensive care unit and underwent PMMA-CHDF whether or not they had renal failure. Blood level of interleukin (IL)-6, as an indicator of cytokine network activation, and intra-abdominal pressure (IAP) were measured daily to investigate their time-course of changes and the correlation between the two. The blood level of IL-6 was high at 1350+/-1540 pg/mL on admission to the ICU. However, it significantly decreased to 679+/-594 pg/mL 24 h after initiation of PMMA-CHDF (P<0.05), and thereafter decreased rapidly. Mean intra-abdominal pressure (IAP) on admission was high, at 14.6+/-5.3 mm Hg, with an IAP of 20 mm Hg or over in 2 of 17 patients, showing that they had already developed IAH. The IAP was significantly lower (P<0.05) 24 h after initiation of PMMA-CHDF, and subsequently decreased. There was a significant positive correlation between blood level of IL-6 and IAP, suggesting that PMMA-CHDF improved vascular permeability through elimination of cytokines, and that it thereby decreased interstitial edema to lower IAP. Sixteen of the 17 patients were discharged from the hospital in remission from SAP without development of complications. Continuous hemodiafiltration using a polymethyl methacrylate membrane hemofilter appears to be effective for prevention and treatment of IAH in patients with SAP through the removal of causative cytokines of hyperpermeability.
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Affiliation(s)
- Shigeto Oda
- Department of Emergency and Critical Care Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan.
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