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Williams B, Zou L, Pittet JF, Chao W. Sepsis-Induced Coagulopathy: A Comprehensive Narrative Review of Pathophysiology, Clinical Presentation, Diagnosis, and Management Strategies. Anesth Analg 2024; 138:696-711. [PMID: 38324297 PMCID: PMC10916756 DOI: 10.1213/ane.0000000000006888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/28/2023] [Indexed: 02/08/2024]
Abstract
Physiological hemostasis is a balance between pro- and anticoagulant pathways, and in sepsis, this equilibrium is disturbed, resulting in systemic thrombin generation, impaired anticoagulant activity, and suppression of fibrinolysis, a condition termed sepsis-induced coagulopathy (SIC). SIC is a common complication, being present in 24% of patients with sepsis and 66% of patients with septic shock, and is often associated with poor clinical outcomes and high mortality. 1 , 2 Recent preclinical and clinical studies have generated new insights into the molecular pathogenesis of SIC. In this article, we analyze the complex pathophysiology of SIC with a focus on the role of procoagulant innate immune signaling in hemostatic activation--tissue factor production, thrombin generation, endotheliopathy, and impaired antithrombotic functions. We also review clinical presentations of SIC, the diagnostic scoring system and laboratory tests, the current standard of care, and clinical trials evaluating the efficacies of anticoagulant therapies.
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Affiliation(s)
- Brittney Williams
- From the Division of Cardiothoracic Anesthesia, Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, Maryland
- Translational Research Program, Department of Anesthesiology & Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, Maryland
| | - Lin Zou
- Translational Research Program, Department of Anesthesiology & Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, Maryland
| | - Jean-Francois Pittet
- Division of Critical Care, Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Wei Chao
- Translational Research Program, Department of Anesthesiology & Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, Maryland
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2
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Papadogeorgou P, Boutsikou T, Boutsikou M, Pergantou E, Mantzou A, Papassotiriou I, Iliodromiti Z, Sokou R, Bouza E, Politou M, Iacovidou N, Valsami S. A Global Assessment of Coagulation Profile and a Novel Insight into Adamts-13 Implication in Neonatal Sepsis. BIOLOGY 2023; 12:1281. [PMID: 37886991 PMCID: PMC10604288 DOI: 10.3390/biology12101281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 09/19/2023] [Accepted: 09/21/2023] [Indexed: 10/28/2023]
Abstract
Neonatal sepsis is a life-threatening condition associated with significant morbidity and mortality. Sepsis-induced coagulopathy is a well-recognized entity, signifying the strong cross-talk between inflammation and coagulation. The aim of the present study was to compare the coagulation profile between the acute phase of sepsis and recovery in term and preterm neonates. Additional comparisons to healthy neonates were undertaken. Levels of clotting, anti-clotting factors and ADAMTS-13 (A disintegrin and metalloprotease with thrombospondin type-1 motives), the cleaving protein of von Willebrand factor (VWF), were measured in 16 term and preterm neonates in the acute phase of infection and following recovery, as well as in 18 healthy neonates. Clotting times were prolonged, while levels of particular clotting factors were lower in the acute phase of infection compared to controls and recovery. On the other hand, levels of fibrinogen, factor VIII (FVIII) and VWF were significantly higher in the acute phase in comparison to controls and recovery, while they remained persistently higher in the infection group compared to controls. In regard to the anticlotting mechanism, a clear suppression was observed in septic neonates. ADAMTS-13 levels were significantly lower in the acute phase of infection in comparison to controls and recovery (p = 0.015 and 0.004, respectively), while a trend toward superimposed normalization was demonstrated post infection, as higher ADAMTS-13 levels were measured in recovered neonates compared to controls (p = 0.002). The coagulation profile is considerably deranged in neonatal sepsis. ADAMTS-13 deficiency in septic neonates is a novel finding with promising future implications, as ADAMTS-13 substitution may serve as a useful therapeutic option in neonatal sepsis, prompting further investigation in future studies.
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Affiliation(s)
- Paraskevi Papadogeorgou
- Neonatal Department, Medical School, National and Kapodistrian University of Athens, Aretaieio Hospital, 115 28 Athens, Greece
| | - Theodora Boutsikou
- Neonatal Department, Medical School, National and Kapodistrian University of Athens, Aretaieio Hospital, 115 28 Athens, Greece
| | - Maria Boutsikou
- Neonatal Department, Medical School, National and Kapodistrian University of Athens, Aretaieio Hospital, 115 28 Athens, Greece
| | - Eleni Pergantou
- Haemostasis Unit/Haemophilia Centre, “Aghia Sophia” Children’s Hospital, 115 27 Athens, Greece
| | - Aimilia Mantzou
- First Department of Paediatrics, Medical School, National and Kapodistrian University of Athens, “Aghia Sophia” Children’s Hospital, 115 27 Athens, Greece
| | - Ioannis Papassotiriou
- First Department of Paediatrics, Medical School, National and Kapodistrian University of Athens, “Aghia Sophia” Children’s Hospital, 115 27 Athens, Greece
| | - Zoi Iliodromiti
- Neonatal Department, Medical School, National and Kapodistrian University of Athens, Aretaieio Hospital, 115 28 Athens, Greece
| | - Rozeta Sokou
- Neonatal Department, Medical School, National and Kapodistrian University of Athens, Aretaieio Hospital, 115 28 Athens, Greece
| | - Elena Bouza
- 2nd Neonatal Intensive Care Unit, “Aghia Sophia” Children’s Hospital, 115 27 Athens, Greece
| | - Marianna Politou
- Blood Transfusion Department, Aretaieio Hospital, Medical School, National and Kapodistrian University of Athens, 115 28 Athens, Greece
| | - Nikoletta Iacovidou
- Neonatal Department, Medical School, National and Kapodistrian University of Athens, Aretaieio Hospital, 115 28 Athens, Greece
| | - Serena Valsami
- Blood Transfusion Department, Aretaieio Hospital, Medical School, National and Kapodistrian University of Athens, 115 28 Athens, Greece
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J D Moreira N, Dos Santos F, Li JB, Aletti F, Irigoyen MCC, Kistler EB. Enteral administration of the protease inhibitor gabexate mesilate preserves vascular function in experimental trauma/hemorrhagic shock. Sci Rep 2023; 13:10148. [PMID: 37349360 PMCID: PMC10287748 DOI: 10.1038/s41598-023-36021-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 05/27/2023] [Indexed: 06/24/2023] Open
Abstract
Preserving vascular function is crucial for preventing multiorgan failure and death in ischemic and low-pressure states such as trauma/hemorrhagic shock (T/HS). It has recently been reported that inhibiting circulating proteases released from the bowel to the circulation during T/HS may preserve vascular function and improve outcomes following T/HS. This study aimed to evaluate the role of the serine protease inhibitor gabexate mesilate (GM) in preserving vascular function during T/HS when given enterally. We studied the vascular reactivity of mesenteric arteries from male Wistar rats treated with enteral GM (10 mg/kg) (GM-treated, n = 6) or control (Shock-control, n = 6) following (T/HS) using pressure myography. Concentration-response curves of endothelial-dependent and endothelial-independent agonists (e.g., acetylcholine, sodium nitroprusside) ranging from 10-10 to 10-5 M were performed. In a second set of experiments, ex-vivo arteries from healthy rats were perfused with plasma from shocked animals from both groups and vascular performance was similarly measured. Arteries from the GM-treated group demonstrated a preserved concentration-response curve to the α1 adrenergic agonist phenylephrine compared to arteries from Shock-control animals (- logEC50: - 5.73 ± 0.25 vs. - 6.48 ± 0.2, Shock-control vs. GM-treated, p = 0.04). When perfused with plasma from GM-treated rats, healthy arteries exhibited an even greater constriction and sensitivity to phenylephrine (- logEC50: - 6.62 ± 0.21 vs. - 7.13 ± 0.21, Shock-control vs. GM-treated, p = 0.02). Enteral GM also preserved the endothelium-dependent vascular response to agonists following T/HS and limited syndecan-1 shedding as a marker of glycocalyx compromise (41.84 ± 9 vs. 17.63 ± 3.97 ng/mL, Shock-control vs. GM-treated, p = 0.02). Syndecan-1 cleavage was correlated with plasma trypsin-like activity (r2 = 0.9611). Enteral gabexate mesilate was able to maintain vascular function in experimental T/HS, which was reflected by improved hemodynamics (mean arterial pressure 50.39 ± 7.91 vs. 64.95 ± 3.43 mmHg, Shock-control vs. GM treated, p = 0.0001). Enteral serine protease inhibition may be a potential therapeutic intervention in the treatment of T/HS.
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Affiliation(s)
- Nathalia J D Moreira
- Instituto do Coração, Hospital das ClínicasFaculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil.
| | - Fernando Dos Santos
- Department of Anesthesiology and Critical Care, University of California, San Diego, La Jolla, CA, USA
| | - Joyce B Li
- Department of Bioengineering, University of California, San Diego, La Jolla, CA, USA
| | - Federico Aletti
- Universidade Federal de São Paulo, São José dos Campos, Brazil
| | - Maria Claudia C Irigoyen
- Instituto do Coração, Hospital das ClínicasFaculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Erik B Kistler
- Department of Anesthesiology and Critical Care, University of California, San Diego, La Jolla, CA, USA
- Veterans Affairs San Diego Healthcare System, San Diego, CA, USA
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Vincent LE, Talanker MM, Butler DD, Zhang X, Podbielski JM, Wang YWW, Chen-Goodspeed A, Hernandez Gonzalez SL, Fox EE, Cotton BA, Wade CE, Cardenas JC. Association of Changes in Antithrombin Activity Over Time With Responsiveness to Enoxaparin Prophylaxis and Risk of Trauma-Related Venous Thromboembolism. JAMA Surg 2022; 157:713-721. [PMID: 35731524 PMCID: PMC9218925 DOI: 10.1001/jamasurg.2022.2214] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Importance Venous thromboembolism (VTE) affects 2% to 20% of recovering trauma patients, despite aggressive prophylaxis with enoxaparin. Antithrombin is a primary circulating anticoagulant and crucial component of enoxaparin thromboprophylaxis. Approximately 20% of trauma patients present with antithrombin deficiency (antithrombin activity <80%). Objective To examine time-dependent changes in antithrombin activity, responsiveness to enoxaparin, as measured by anti-factor Xa (anti-FXa) levels, and incidence of VTE after severe trauma and to assess the association of ex vivo antithrombin supplementation with patients' sensitivity to enoxaparin prophylaxis. Design, Setting, and Participants This single-center, prospective cohort study was performed at a level 1 trauma center between January 7, 2019, and February 28, 2020. Adult trauma patients admitted to the trauma service at high risk for VTE, based on injury pattern and severity, were screened and enrolled. Patients who were older than 70 years, were pregnant, had a known immunologic or coagulation disorder, or were receiving prehospital anticoagulants were excluded. Exposures Blood samples were collected on emergency department arrival and daily for the first 8 days of hospitalization. Main Outcomes and Measures Patients' antithrombin activity and anti-FXa levels were measured by a coagulation analyzer, and thrombin generation was measured by calibrated automated thrombography. Responsiveness to enoxaparin was assessed by measuring anti-FXa levels 4 to 6 hours after the first daily enoxaparin dose and compared between patients who developed VTE and who did not. In addition, the associations of ex vivo supplementation of antithrombin with plasma anti-FXa levels were assessed. Results Among 150 patients enrolled (median [IQR] age, 35 [27-53] years; 37 [24.7%] female and 113 [75.3%] male; 5 [3.3%] Asian, 32 [21.3%] Black, and 113 [75.3%] White; and 51 [34.0%] of Hispanic ethnicity), 28 (18.7%) developed VTE. Patients with VTE had significantly lower antithrombin activity on admission compared with patients without VTE (median [IQR], 91% [79%-104%] vs 100% [88%-112%]; P = .04), as well as lower antithrombin activity on hospital days 5 (median (IQR), 90% [83%-99%] vs 114% [99%-130%]; P = .011), 6 (median [IQR], 97% [81%-109%] vs 123% [104%-134%]; P = .003), 7 (median [IQR], 82% [74%-89%] vs 123% [110%-140%]; P < .001), and 8 (median [IQR], 99% [85%-100%] vs 123% [109%-146%]; P = .011). Anti-FXa levels were significantly lower in patients with VTE vs those without VTE at hospital day 4 (median [IQR], 0.10 [0.05-0.14] IU/mL vs 0.18 [0.13-0.23] IU/mL; P = .006), day 6 (median [IQR], 0.12 [0.08-0.14] IU/mL vs 0.22 [0.13-0.28] IU/mL; P = .02), and day 7 (median [IQR], 0.11 [0.08-0.12] IU/mL vs 0.21 [0.13, 0.28] IU/mL; P = .002). Multivariable analyses found that for every 10% decrease in antithrombin activity during the first 3 days, the risk of VTE increased 1.5-fold. Conclusions and Relevance The results of this cohort study suggest that after severe trauma, antithrombin deficiency is common and contributes to enoxaparin resistance and VTE. Interventional studies are necessary to determine the efficacy of antithrombin supplementation in the reduction of VTE incidence.
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Affiliation(s)
- Laura E. Vincent
- Center for Translational Injury Research, Department of Surgery, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston
| | - Michael M. Talanker
- Center for Translational Injury Research, Department of Surgery, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston
| | - Dakota D. Butler
- Center for Translational Injury Research, Department of Surgery, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston
| | - Xu Zhang
- Center for Clinical and Translational Sciences, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston
| | - Jeanette M. Podbielski
- Center for Translational Injury Research, Department of Surgery, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston
| | - Yao-Wei W. Wang
- Center for Translational Injury Research, Department of Surgery, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston
| | - Amber Chen-Goodspeed
- Center for Translational Injury Research, Department of Surgery, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston
| | - Selina L. Hernandez Gonzalez
- Center for Translational Injury Research, Department of Surgery, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston
| | - Erin E. Fox
- Center for Translational Injury Research, Department of Surgery, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston
| | - Bryan A. Cotton
- Center for Translational Injury Research, Department of Surgery, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston,Red Duke Trauma Institute, Memorial Hermann Hospital, Houston, Texas
| | - Charles E. Wade
- Center for Translational Injury Research, Department of Surgery, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston,Red Duke Trauma Institute, Memorial Hermann Hospital, Houston, Texas
| | - Jessica C. Cardenas
- Center for Translational Injury Research, Department of Surgery, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston
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Okimoto S, Tashiro H, Iwako H, Kuroda S, Kobayashi T, Hinoi T, Ohdan H. Antithrombin attenuates the progression of hepatocellular carcinoma by regulating neutrophil/interleukin-8 signaling. Hepatol Res 2020; 50:1284-1296. [PMID: 32893935 DOI: 10.1111/hepr.13558] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 07/22/2020] [Accepted: 07/28/2020] [Indexed: 12/12/2022]
Abstract
AIM Inflammation plays an important role in hepatocellular carcinoma (HCC) progression. Here, we examined whether antithrombin (AT) plays a role in attenuating HCC progression, via its anti-inflammatory effects. METHODS HCCs were developed in AT-insufficient (AT+/- ) mice and wild-type (AT+/+ ) mice treated with diethyl nitrosamine and carbon tetrachloride. AT was administered to AT+/- mice. The development of HCC was compared between the three groups. In vitro study, migration assay was performed. The association of the prognosis of patients with HCC and plasma AT values was clinically examined. RESULTS AT suppressed the release of interleukin (IL)-8 from lipopolysaccharide (LPS)-stimulated human neutrophils in vitro. Huh-7 cells that were co-cultured with neutrophils and stimulated with LPS showed significantly enhanced migration; however, Huh-7 cells co-cultured with LPS/AT-stimulated neutrophils showed significantly decreased migration. Moreover, the addition of anti-IL-8 antibodies to LPS-stimulated Huh-7 cells co-cultured with neutrophils also suppressed migration. AT+/- mice (AT plasma activity: 64%) promoted liver cancer, as compared with wild-type mice (AT plasma activity: 135%); AT administration attenuated liver cancer in AT+/- mice. Patients with HCC with a preoperative AT level of ≥70% showed better outcomes after liver resection, as compared with those with an AT level of <70%. IL-8 expression and neutrophil infiltration in HCC tissues were negatively correlated with the AT level. CONCLUSIONS AT attenuates HCC progression by regulating neutrophil/IL-8 signaling.
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Affiliation(s)
- Sho Okimoto
- Department of Gastroenterological and Transplant Surgery, Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Kasumi, Hiroshima, Japan
| | - Hirotaka Tashiro
- Department of Surgery, National Hospital Organization Kure Medical Center, Kure City, Hiroshima, Japan
| | - Hiroshi Iwako
- Department of Gastroenterological and Transplant Surgery, Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Kasumi, Hiroshima, Japan
| | - Shintaro Kuroda
- Department of Gastroenterological and Transplant Surgery, Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Kasumi, Hiroshima, Japan
| | - Tsuyoshi Kobayashi
- Department of Gastroenterological and Transplant Surgery, Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Kasumi, Hiroshima, Japan
| | - Takao Hinoi
- Department of clinical and molecular Genetics, Hiroshima University Hospital, Kasumi, Hiroshima, Japan
| | - Hideki Ohdan
- Department of Gastroenterological and Transplant Surgery, Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Kasumi, Hiroshima, Japan
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Jackson Chornenki NL, Dwivedi DJ, Kwong AC, Zamir N, Fox-Robichaud AE, Liaw PC. Identification of hemostatic markers that define the pre-DIC state: A multi-center observational study. J Thromb Haemost 2020; 18:2524-2531. [PMID: 32573898 DOI: 10.1111/jth.14973] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 06/05/2020] [Accepted: 06/08/2020] [Indexed: 01/09/2023]
Abstract
BACKGROUND A limitation of diagnostic scoring systems for disseminated intravascular coagulation (DIC) is that once DIC is identified, it may be in a state of irreversible deterioration. OBJECTIVES To identify hemostatic markers that can identify the pre-DIC state. METHODS This was a multi-center observational study of 357 septic patients. The incidence of DIC was determined using the International Society on Thrombosis and Haemostasis (ISTH) DIC Score. Markers of interest include components of the DIC score: protein C (PC), antithrombin (AT), and citrullinated histones (H3Cit), which is a marker of NETosis. RESULTS Out of 357 sepsis patients, 236 patients did not develop DIC (without-DIC), 79 patients had DIC on Day 1 (overt-DIC), and 42 patients developed DIC after Day 1 (pre-DIC). Compared to without-DIC patients, pre-DIC patients had decreased platelet count, increased international normalized ratio (INR), decreased PC and AT, and increased H3Cit. In contrast, D-dimer and fibrinogen levels did not differ between pre-DIC and without-DIC patients. Using receiver operating characteristics (ROC) analysis, we found that platelet count and INR in combination with PC and AT could discriminate pre-DIC from without-DIC. The area under the curve in the ROC analysis was 0.83 (95% confidence interval, 0.76 to 0.89). CONCLUSION Our study suggests that platelets and INR in combination with PC and AT can identify the pre-DIC state in septic patients. In contrast, D-dimer increased and fibrinogen decreased in the late (ie, overt) stages of DIC. Our data also suggest that NETosis contributes to the onset of DIC in sepsis.
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Affiliation(s)
- Nicholas L Jackson Chornenki
- Department of Medicine, McMaster University, Hamilton, ON, Canada
- Thrombosis and Atherosclerosis Research Institute (TaARI), Hamilton, ON, Canada
| | - Dhruva J Dwivedi
- Thrombosis and Atherosclerosis Research Institute (TaARI), Hamilton, ON, Canada
| | - Andrew C Kwong
- Thrombosis and Atherosclerosis Research Institute (TaARI), Hamilton, ON, Canada
| | - Nasim Zamir
- Thrombosis and Atherosclerosis Research Institute (TaARI), Hamilton, ON, Canada
| | - Alison E Fox-Robichaud
- Department of Medicine, McMaster University, Hamilton, ON, Canada
- Thrombosis and Atherosclerosis Research Institute (TaARI), Hamilton, ON, Canada
| | - Patricia C Liaw
- Department of Medicine, McMaster University, Hamilton, ON, Canada
- Thrombosis and Atherosclerosis Research Institute (TaARI), Hamilton, ON, Canada
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Niederwanger C, Hell T, Hofer S, Salvador C, Michel M, Schenk B, Treml B, Bachler M. Antithrombin deficiency is associated with mortality and impaired organ function in septic pediatric patients: a retrospective study. PeerJ 2018; 6:e5538. [PMID: 30202654 PMCID: PMC6129139 DOI: 10.7717/peerj.5538] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Accepted: 08/08/2018] [Indexed: 12/16/2022] Open
Abstract
Background Sepsis remains a major problem in intensive care medicine. It is often accompanied by coagulopathies, leading to thrombotic occlusion of small vessels with subsequent organ damage and even fatal multi-organ failure. Prediction of the clinical course and outcome—especially in the heterogeneous group of pediatric patients—is difficult. Antithrombin, as an endogenous anticoagulant enzyme with anti-inflammatory properties, plays a central role in controling coagulation and infections. We investigated the relationship between antithrombin levels and organ failure as well as mortality in pediatric patients with sepsis. Methods Data from 164 patients under the age of 18, diagnosed with sepsis, were retrospectively reviewed. Antithrombin levels were recorded three days before to three days after peak C-reactive protein to correlate antithrombin levels with inflammatory activity. Using the concept of developmental haemostasis, patients were divided into groups <1 yr and ≥1 yr of age. Results In both age groups, survivors had significantly higher levels of antithrombin than did deceased patients. An optimal threshold level for antithrombin was calculated by ROC analysis for survival: 41.5% (<1 yr) and 67.5% (≥1 yr). The mortality rate above this level was 3.3% (<1 yr) and 9.5% (≥1 yr), and below this level 41.7% (<1 yr) and 32.2% (≥1 yr); OR 18.8 (1.74 to 1005.02), p = 0.0047, and OR 4.46 (1.54 to 14.89), p = 0.003. In children <1 yr with antithrombin levels <41.5% the rate of respiratory failure (66.7%) was significantly higher than in patients with antithrombin levels above this threshold level (23.3%), OR 6.23 (1.23 to 37.81), p = 0.0132. In children ≥1 yr, both liver failure (20.3% vs 1.6%, OR 15.55 (2.16 to 685.01), p = 0.0008) and a dysfunctional intestinal tract (16.9% vs 4.8%, OR 4.04 (0.97 to 24.08), p = 0.0395) occurred more frequently above the antithrombin threshold level of 67.5%. Conclusion In pediatric septic patients, significantly increased mortality and levels of organ failure were found below an age-dependent antithrombin threshold level. Antithrombin could be useful as a prognostic marker for survival and occurrence of organ failure in pediatric sepsis.
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Affiliation(s)
- Christian Niederwanger
- Department of Pediatrics, Pediatrics I, Intensive Care Unit, Medical University of Innsbruck, Innsbruck, Austria
| | - Tobias Hell
- Department of Mathematics, Faculty of Mathematics, Computer Science and Physics, University of Innsbruck, Innsbruck, Austria
| | - Sophie Hofer
- Department of General and Surgical Critical Care Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - Christina Salvador
- Department of Pediatrics, Pediatrics I, Haematology and Oncology, Medical University of Innsbruck, Innsbruck, Austria
| | - Miriam Michel
- Department of Pediatrics, Pediatrics III, Cardiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Bettina Schenk
- Department of General and Surgical Critical Care Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - Benedikt Treml
- Department of General and Surgical Critical Care Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - Mirjam Bachler
- Department of Sports Medicine, Alpine Medicine and Health Tourism, UMIT - University for Health Sciences, Medical Informatics and Technology, Hall in Tirol, Austria
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Hsia K, Yang MJ, Chen WM, Yao CL, Lin CH, Loong CC, Huang YL, Lin YT, Lander AD, Lee H, Lu JH. Sphingosine-1-phosphate improves endothelialization with reduction of thrombosis in recellularized human umbilical vein graft by inhibiting syndecan-1 shedding in vitro. Acta Biomater 2017; 51:341-350. [PMID: 28110073 DOI: 10.1016/j.actbio.2017.01.050] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 01/16/2017] [Accepted: 01/17/2017] [Indexed: 12/31/2022]
Abstract
Sphingosine-1-phosphate (S1P) has been known to promote endothelial cell (EC) proliferation and protect Syndecan-1 (SDC1) from shedding, thereby maintaining this antithrombotic signal. In the present study, we investigated the effect of S1P in the construction of a functional tissue-engineered blood vessel by using human endothelial cells and decellularized human umbilical vein (DHUV) scaffolds. Both human umbilical vein endothelial cells (HUVEC) and human cord blood derived endothelial progenitor cells (EPC) were seeded onto the scaffold with or without the S1P treatment. The efficacy of re-cellularization was determined by using the fluorescent marker CellTracker CMFDA and anti-CD31 immunostaining. The antithrombotic effect of S1P was examined by the anti-aggregation tests measuring platelet adherence and clotting time. Finally, we altered the expression of SDC1, a major glycocalyx protein on the endothelial cell surface, using MMP-7 digestion to explore its role using platelet adhesion tests in vitro. The result showed that S1P enhanced the attachment of HUVEC and EPC. Based on the anti-aggregation tests, S1P-treated HUVEC recellularized vessels when grafted showed reduced thrombus formation compared to controls. Our results also identified reduced SDC1 shedding from HUVEC responsible for inhibition of platelet adherence. However, no significant antithrombogenic effect of S1P was observed on EPC. In conclusion, S1P is an effective agent capable of decreasing thrombotic risk in engineered blood vessel grafts. STATEMENT OF SIGNIFICANCE Sphingosine-1phosphate (S1P) is a low molecular-weight phospholipid mediator that regulates diverse biological activities of endothelial cell, including survival, proliferation, cell barrier integrity, and also influences the development of the vascular system. Based on these characters, we the first time to use it as an additive during the process of a small caliber blood vessel construction by decellularized human umbilical vein and endothelial cell/endothelial progenitor. We further explored the function and mechanism of S1P in promoting revascularization and protection against thrombosis in this tissue engineered vascular grafts. The results showed that S1P could not only accelerate the generation but also reduce thrombus formation of small caliber blood vessel.
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Heine A, Held SAE, Schulte-Schrepping J, Wolff JFA, Klee K, Ulas T, Schmacke NA, Daecke SN, Riethausen K, Schultze JL, Brossart P. Generation and functional characterization of MDSC-like cells. Oncoimmunology 2017; 6:e1295203. [PMID: 28507805 DOI: 10.1080/2162402x.2017.1295203] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 02/04/2017] [Accepted: 02/08/2017] [Indexed: 01/10/2023] Open
Abstract
Myeloid-derived suppressor cells (MDSC) are critical in regulating immune responses by suppressing antigen presenting cells (APC) and T cells. We previously observed that incubation of peripheral blood monocytes with interleukin (IL)-10 during their differentiation to monocyte-derived dendritic cells (moDCs) results in the generation of an APC population with a CD14+HLA-DRlowphenotype (IL-10-APC) with reduced stimulatory capacity similar to human MDSC. Co-incubation experiments now revealed that the addition of IL-10-APC to moDC caused a reduction of DC-induced T-cell proliferation, of the expression of maturation markers, and of secreted cytokines and chemokines such as TNF-α, IL-6, MIP-1α and Rantes. Addition of IL-10-APC increased the immunosuppressive molecule osteoactivin and its corresponding receptor syndecan-4 on moDC. Moreover, CD14+HLA-DRlow MDSC isolated from healthy donors expressed high levels of osteoactivin, which was even further upregulated by the auxiliary addition of IL-10. Using transcriptome analysis, we identified a set of molecules and pathways mediating these effects. In addition, we found that IL-10-APC as well as human isolated MDSC expressed higher levels of programmed death (PD)-1, PD-ligand-1 (PD-L1), glucocorticoid-induced-tumor-necrosis-factor-receptor-related-protein (GITR) and GITR-ligand. Inhibition of osteoactivin, syndecan-4, PD-1 or PD-L1 on MDSC by using blocking antibodies restored the stimulatory capacity of DC in co-incubation experiments. Activation of MDSC with Dectin-1 ligand curdlan reduced the expression of osteoactivin and PD-L1. Our results demonstrate that osteoactivin/syndecan-4 and PD-/PD-L1 are key molecules that are profoundly involved in the inhibitory effects of MDSC on DC function and might be promising tools for clinical application.
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Affiliation(s)
- Annkristin Heine
- Medical Clinic III for Oncology, Hematology and Rheumatology, University Hospital Bonn, Bonn, Germany
| | | | | | | | - Kathrin Klee
- Genomics and Immunoregulation, LIMES-Institute, University of Bonn, Bonn, Germany
| | - Thomas Ulas
- Genomics and Immunoregulation, LIMES-Institute, University of Bonn, Bonn, Germany
| | | | - Solveig Nora Daecke
- Medical Clinic III for Oncology, Hematology and Rheumatology, University Hospital Bonn, Bonn, Germany
| | - Kati Riethausen
- Medical Clinic III for Oncology, Hematology and Rheumatology, University Hospital Bonn, Bonn, Germany
| | - Joachim L Schultze
- Genomics and Immunoregulation, LIMES-Institute, University of Bonn, Bonn, Germany.,Platform for Single Cell Genomics and Epigenomics (PRECISE) at the German Center for Neurodegenerative Diseases (DZNE) and the University of Bonn, Bonn, Germany
| | - Peter Brossart
- Medical Clinic III for Oncology, Hematology and Rheumatology, University Hospital Bonn, Bonn, Germany
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10
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Becker BF, Jacob M, Leipert S, Salmon AHJ, Chappell D. Degradation of the endothelial glycocalyx in clinical settings: searching for the sheddases. Br J Clin Pharmacol 2015; 80:389-402. [PMID: 25778676 DOI: 10.1111/bcp.12629] [Citation(s) in RCA: 260] [Impact Index Per Article: 28.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 02/10/2015] [Accepted: 03/11/2015] [Indexed: 12/11/2022] Open
Abstract
The endothelial glycocalyx has a profound influence at the vascular wall on the transmission of shear stress, on the maintenance of a selective permeability barrier and a low hydraulic conductivity, and on attenuating firm adhesion of blood leukocytes and platelets. Major constituents of the glycocalyx, including syndecans, heparan sulphates and hyaluronan, are shed from the endothelial surface under various acute and chronic clinical conditions, the best characterized being ischaemia and hypoxia, sepsis and inflammation, atherosclerosis, diabetes, renal disease and haemorrhagic viral infections. Damage has also been detected by in vivo microscopic techniques. Matrix metalloproteases may shed syndecans and heparanase, released from activated mast cells, cleaves heparan sulphates from core proteins. According to new data, not only hyaluronidase but also the serine proteases thrombin, elastase, proteinase 3 and plasminogen, as well as cathepsin B lead to loss of hyaluronan from the endothelial surface layer, suggesting a wide array of potentially destructive conditions. Appropriately, pharmacological agents such as inhibitors of inflammation, antithrombin and inhibitors of metalloproteases display potential to attenuate shedding of the glycocalyx in various experimental models. Also, plasma components, especially albumin, stabilize the glycocalyx and contribute to the endothelial surface layer. Though symptoms of the above listed diseases and conditions correlate with sequelae expected from disturbance of the endothelial glycocalyx (oedema, inflammation, leukocyte and platelet adhesion, low reflow), therapeutic studies to prove a causal connection have yet to be designed. With respect to studies on humans, some clinical evidence exists for benefits from application of sulodexide, a preparation delivering precursors of the glycocalyx constituent heparan sulphate. At present, the simplest option for protecting the glycocalyx seems to be to ensure an adequate level of albumin. However, also in this case, definite proof of causality needs to be delivered.
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Affiliation(s)
- Bernhard F Becker
- Walter-Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Matthias Jacob
- Department of Anaesthesiology, Hospital St Elisabeth, Straubing, Germany
| | - Stephanie Leipert
- Walter-Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Andrew H J Salmon
- Bristol Renal, School of Physiology and Pharmacology, University of Bristol, Bristol, UK
| | - Daniel Chappell
- Department of Anaesthesiology, University Hospital Munich, Munich, Germany
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11
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Whole proteome analysis of mouse lymph nodes in cutaneous anthrax. PLoS One 2014; 9:e110873. [PMID: 25329596 PMCID: PMC4203832 DOI: 10.1371/journal.pone.0110873] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Accepted: 09/25/2014] [Indexed: 12/16/2022] Open
Abstract
This study aimed to characterize a soluble proteome of popliteal lymph nodes during lymphadenitis induced by intradermal injection of Bacillus anthracis Sterne spores in mice using tandem LC-MS/MS and reverse-phase protein microarray with antibodies specific to epitopes of phosphorylated proteins. More than 380 proteins were detected in the normal intra-nodal lymph, while the infectious process resulted in the profound changes in the protein abundances and appearance of 297 unique proteins. These proteins belong to an array of processes reflecting response to wounding, inflammation and perturbations of hemostasis, innate immune response, coagulation and fibrinolysis, regulation of body fluid levels and vascular disturbance among others. Comparison of lymph and serum revealed 83 common proteins. Also, using 71 antibodies specific to total and phosphorylated forms of proteins we carried initial characterization of circulating lymph phosphoproteome which brought additional information regarding signaling pathways operating in the lymphatics. The results demonstrate that the proteome of intra-nodal lymph serves as a sensitive sentinel of the processes occurring within the lymph nodes during infection. The acute innate response of the lymph nodes to anthrax is accompanied by cellular damage and inflammation with a large number of up- and down-regulated proteins many of which are distinct from those detected in serum. MS data are available via ProteomeXchange with identifier PXD001342.
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12
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Remy KE, Qiu P, Li Y, Cui X, Eichacker PQ. B. anthracis associated cardiovascular dysfunction and shock: the potential contribution of both non-toxin and toxin components. BMC Med 2013; 11:217. [PMID: 24107194 PMCID: PMC3851549 DOI: 10.1186/1741-7015-11-217] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Accepted: 09/13/2013] [Indexed: 01/31/2023] Open
Abstract
The development of cardiovascular dysfunction and shock in patients with invasive Bacillus anthracis infection has a particularly poor prognosis. Growing evidence indicates that several bacterial components likely play important pathogenic roles in this injury. As with other pathogenic Gram-positive bacteria, the B. anthracis cell wall and its peptidoglycan constituent produce a robust inflammatory response with its attendant tissue injury, disseminated intravascular coagulation and shock. However, B. anthracis also produces lethal and edema toxins that both contribute to shock. Growing evidence suggests that lethal toxin, a metalloprotease, can interfere with endothelial barrier function as well as produce myocardial dysfunction. Edema toxin has potent adenyl cyclase activity and may alter endothelial function, as well as produce direct arterial and venous relaxation. Furthermore, both toxins can weaken host defense and promote infection. Finally, B. anthracis produces non-toxin metalloproteases which new studies show can contribute to tissue injury, coagulopathy and shock. In the future, an understanding of the individual pathogenic effects of these different components and their interactions will be important for improving the management of B. anthracis infection and shock.
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Affiliation(s)
- Kenneth E Remy
- Critical Care Medicine Department, Clinical Center, National Institutes of Health, Bethesda, MD 20892, USA.
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13
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Qiu P, Li Y, Shiloach J, Cui X, Sun J, Trinh L, Kubler-Kielb J, Vinogradov E, Mani H, Al-Hamad M, Fitz Y, Eichacker PQ. Bacillus anthracis cell wall peptidoglycan but not lethal or edema toxins produces changes consistent with disseminated intravascular coagulation in a rat model. J Infect Dis 2013; 208:978-89. [PMID: 23737601 DOI: 10.1093/infdis/jit247] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Disseminated intravascular coagulation (DIC) appears to be important in the pathogenesis of Bacillus anthracis infection, but its causes are unclear. Although lethal toxin (LT) and edema toxin (ET) could contribute, B. anthracis cell wall peptidoglycan (PGN), not the toxins, stimulates inflammatory responses associated with DIC. METHODS AND RESULTS To better understand the pathogenesis of DIC during anthrax, we compared the effects of 24-hour infusions of PGN, LT, ET, or diluent (control) on coagulation measures 6, 24, or 48 hours after infusion initiation in 135 rats. No control recipient died. Lethality rates (approximately 30%) did not differ among PGN, LT, and ET recipients (P = .78). Thirty-three of 35 deaths (94%) occurred between 6 and 24 hours after the start of challenge. Among challenge components, PGN most consistently altered coagulation measures. Compared with control at 6 hours, PGN decreased platelet and fibrinogen levels and increased prothrombin and activated partial thromboplastin times and tissue factor, tissue factor pathway inhibitor, protein C, plasminogen activator inhibitor (PAI), and thrombin-antithrombin complex levels, whereas LT and ET only decreased the fibrinogen level or increased the PAI level (P ≤ .05). Nearly all effects associated with PGN infusion significantly differed from changes associated with toxin infusion (P ≤ .05 for all comparisons except for PAI level). CONCLUSION DIC during B. anthracis infection may be related more to components such as PGN than to LT or ET.
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Affiliation(s)
- Ping Qiu
- Critical Care Medicine Department, Clinical Center, National Institutes of Health, Bethesda, Maryland, USA
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14
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Chen PK, Chang HH, Lin GL, Wang TP, Lai YL, Lin TK, Hsieh MC, Kau JH, Huang HH, Hsu HL, Liao CY, Sun DS. Suppressive effects of anthrax lethal toxin on megakaryopoiesis. PLoS One 2013; 8:e59512. [PMID: 23555687 PMCID: PMC3605335 DOI: 10.1371/journal.pone.0059512] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Accepted: 02/15/2013] [Indexed: 01/14/2023] Open
Abstract
Anthrax lethal toxin (LT) is a major virulence factor of Bacillus anthracis. LT challenge suppresses platelet counts and platelet function in mice, however, the mechanism responsible for thrombocytopenia remains unclear. LT inhibits cellular mitogen-activated protein kinases (MAPKs), which are vital pathways responsible for cell survival, differentiation, and maturation. One of the MAPKs, the MEK1/2-extracellular signal-regulated kinase pathway, is particularly important in megakaryopoiesis. This study evaluates the hypothesis that LT may suppress the progenitor cells of platelets, thereby inducing thrombocytopenic responses. Using cord blood-derived CD34(+) cells and mouse bone marrow mononuclear cells to perform in vitro differentiation, this work shows that LT suppresses megakaryopoiesis by reducing the survival of megakaryocytes. Thrombopoietin treatments can reduce thrombocytopenia, megakaryocytic suppression, and the quick onset of lethality in LT-challenged mice. These results suggest that megakaryocytic suppression is one of the mechanisms by which LT induces thrombocytopenia. These findings may provide new insights for developing feasible approaches against anthrax.
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Affiliation(s)
- Po-Kong Chen
- Institute of Medical Science, Tzu-Chi University, Hualien, Taiwan
| | - Hsin-Hou Chang
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien, Taiwan
- Institute of Medical Science, Tzu-Chi University, Hualien, Taiwan
| | - Guan-Ling Lin
- Institute of Medical Science, Tzu-Chi University, Hualien, Taiwan
| | - Tsung-Pao Wang
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien, Taiwan
| | - Yi-Ling Lai
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien, Taiwan
| | - Ting-Kai Lin
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien, Taiwan
| | - Ming-Chun Hsieh
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien, Taiwan
| | - Jyh-Hwa Kau
- Department of Microbiology and Immunology, National Defense Medical Center, Taipei, Taiwan
| | - Hsin-Hsien Huang
- Institute of Preventive Medicine, National Defense Medical Center, Taipei, Taiwan
| | - Hui-Ling Hsu
- Institute of Preventive Medicine, National Defense Medical Center, Taipei, Taiwan
| | - Chi-Yuan Liao
- Department of Obstetrics and Gynecology, Mennonite Christian Hospital, Hualien, Taiwan
| | - Der-Shan Sun
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien, Taiwan
- Institute of Medical Science, Tzu-Chi University, Hualien, Taiwan
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15
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van Golen RF, van Gulik TM, Heger M. Mechanistic overview of reactive species-induced degradation of the endothelial glycocalyx during hepatic ischemia/reperfusion injury. Free Radic Biol Med 2012; 52:1382-402. [PMID: 22326617 DOI: 10.1016/j.freeradbiomed.2012.01.013] [Citation(s) in RCA: 166] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 01/20/2012] [Accepted: 01/20/2012] [Indexed: 02/06/2023]
Abstract
Endothelial cells are covered by a delicate meshwork of glycoproteins known as the glycocalyx. Under normophysiological conditions the glycocalyx plays an active role in maintaining vascular homeostasis by deterring primary and secondary hemostasis and leukocyte adhesion and by regulating vascular permeability and tone. During (micro)vascular oxidative and nitrosative stress, which prevails in numerous metabolic (diabetes), vascular (atherosclerosis, hypertension), and surgical (ischemia/reperfusion injury, trauma) disease states, the glycocalyx is oxidatively and nitrosatively modified and degraded, which culminates in an exacerbation of the underlying pathology. Consequently, glycocalyx degradation due to oxidative/nitrosative stress has far-reaching clinical implications. In this review the molecular mechanisms of reactive oxygen and nitrogen species-induced destruction of the endothelial glycocalyx are addressed in the context of hepatic ischemia/reperfusion injury as a model disease state. Specifically, the review focuses on (i) the mechanisms of glycocalyx degradation during hepatic ischemia/reperfusion, (ii) the molecular and cellular players involved in the degradation process, and (iii) its implications for hepatic pathophysiology. These topics are projected against a background of liver anatomy, glycocalyx function and structure, and the biology/biochemistry and the sources/targets of reactive oxygen and nitrogen species. The majority of the glycocalyx-related mechanisms elucidated for hepatic ischemia/reperfusion are extrapolatable to the other aforementioned disease states.
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Affiliation(s)
- Rowan F van Golen
- Department of Experimental Surgery, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
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16
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Popova TG, Millis B, Bailey C, Popov SG. Platelets, inflammatory cells, von Willebrand factor, syndecan-1, fibrin, fibronectin, and bacteria co-localize in the liver thrombi of Bacillus anthracis-infected mice. Microb Pathog 2011; 52:1-9. [PMID: 22001909 DOI: 10.1016/j.micpath.2011.08.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2010] [Revised: 08/16/2011] [Accepted: 08/23/2011] [Indexed: 11/27/2022]
Abstract
UNLABELLED Vascular dysfunction and thrombosis have been described in association with anthrax infection in humans and animals but the mechanisms of these dysfunctions, as well as the components involved in thrombi formation are poorly understood. Immunofluorescent microscopy was used to define the composition of thrombi in the liver of mice challenged with the Bacillus anthracis Sterne spores. Lethal infection with the toxigenic Sterne strain, in contrast to the non-lethal, non-toxigenic delta-Sterne strain, demonstrated time-dependent increase in the number of vegetative bacteria inside the liver sinusoids and central vein. Massive appearance of thrombi typically occluding the lumen of the vessels coincided with the sudden death of infected animals. Bacterial chains in the thrombi were stained positive for syndecan-1 (SDC-1), fibronectin, and were surrounded by fibrin polymers, GPIIb-positive platelets, von Willebrand Factor (vWF), CD45-positive leukocytes, and massive amount of shed SDC-1. Experiments with human umbilical vein endothelial cells (HUVECs) demonstrated the active role of the host response to the secreted pathogenic factors of bacteria during the onset of the pro-thrombotic condition. The bacterial culture supernatants, as well as the isolated proteins (the pore-forming toxin anthrolysin O and phospholipase C) induced release of vWF, while anthrolysin O, sphingomyelinase and edema toxin induced release of thrombin from HUVECs and polymerization of fibrin in the presence of human plasma. CONCLUSION Our findings suggest that activation of endothelium in response to infection can contribute to the formation of occlusive thrombi consisting of aggregated bacteria, vWF, shed SDC-1, fibrin, activated platelets, fibronectin and leukocytes.
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Affiliation(s)
- Taissia G Popova
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, VA 20110, USA.
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17
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Chung MC, Jorgensen SC, Tonry JH, Kashanchi F, Bailey C, Popov S. SecretedBacillus anthracisproteases target the host fibrinolytic system. ACTA ACUST UNITED AC 2011; 62:173-81. [DOI: 10.1111/j.1574-695x.2011.00798.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Xie T, Auth RD, Frucht DM. The effects of anthrax lethal toxin on host barrier function. Toxins (Basel) 2011; 3:591-607. [PMID: 22069727 PMCID: PMC3202839 DOI: 10.3390/toxins3060591] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2011] [Revised: 06/02/2011] [Accepted: 06/07/2011] [Indexed: 01/08/2023] Open
Abstract
The pathological actions of anthrax toxin require the activities of its edema factor (EF) and lethal factor (LF) enzyme components, which gain intracellular access via its receptor-binding component, protective antigen (PA). LF is a metalloproteinase with specificity for selected mitogen-activated protein kinase kinases (MKKs), but its activity is not directly lethal to many types of primary and transformed cells in vitro. Nevertheless, in vivo treatment of several animal species with the combination of LF and PA (termed lethal toxin or LT) leads to morbidity and mortality, suggesting that LT-dependent toxicity is mediated by cellular interactions between host cells. Decades of research have revealed that a central hallmark of this toxicity is the disruption of key cellular barriers required to maintain homeostasis. This review will focus on the current understanding of the effects of LT on barrier function, highlighting recent progress in establishing the molecular mechanisms underlying these effects.
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Affiliation(s)
- Tao Xie
- Laboratory of Cell Biology, Division of Monoclonal Antibodies, Office of Biotechnology Products, Office of Pharmaceutical Science, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Bethesda, MD 20892, USA.
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19
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Mukherjee DV, Tonry JH, Kim KS, Ramarao N, Popova TG, Bailey C, Popov S, Chung MC. Bacillus anthracis protease InhA increases blood-brain barrier permeability and contributes to cerebral hemorrhages. PLoS One 2011; 6:e17921. [PMID: 21437287 PMCID: PMC3060093 DOI: 10.1371/journal.pone.0017921] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2010] [Accepted: 02/17/2011] [Indexed: 01/11/2023] Open
Abstract
Hemorrhagic meningitis is a fatal complication of anthrax, but its pathogenesis remains poorly understood. The present study examined the role of B. anthracis-secreted metalloprotease InhA on monolayer integrity and permeability of human brain microvasculature endothelial cells (HBMECs) which constitute the blood-brain barrier (BBB). Treatment of HBMECs with purified InhA resulted in a time-dependent decrease in trans-endothelial electrical resistance (TEER) accompanied by zonula occluden-1 (ZO-1) degradation. An InhA-expressing B. subtilis exhibited increased permeability of HBMECs, which did not occur with the isogenic inhA deletion mutant (ΔinhA) of B. anthracis, compared with the corresponding wild-type strain. Mice intravenously administered with purified InhA or nanoparticles-conjugated to InhA demonstrated a time-dependent Evans Blue dye extravasation, leptomeningeal thickening, leukocyte infiltration, and brain parenchymal distribution of InhA indicating BBB leakage and cerebral hemorrhage. Mice challenged with vegetative bacteria of the ΔinhA strain of B. anthracis exhibited a significant decrease in leptomeningeal thickening compared to the wildtype strain. Cumulatively, these findings indicate that InhA contributes to BBB disruption associated with anthrax meningitis through proteolytic attack on the endothelial tight junctional protein zonula occluden (ZO)-1.
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Affiliation(s)
- Dhritiman V. Mukherjee
- National Center for Biodefense and Infectious Diseases, Department of Molecular and Microbiology, George Mason University, Manassas, Virginia, United States of America
| | - Jessica H. Tonry
- National Center for Biodefense and Infectious Diseases, Department of Molecular and Microbiology, George Mason University, Manassas, Virginia, United States of America
| | - Kwang Sik Kim
- Division of Pediatric Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | | | - Taissia G. Popova
- National Center for Biodefense and Infectious Diseases, Department of Molecular and Microbiology, George Mason University, Manassas, Virginia, United States of America
| | - Charles Bailey
- National Center for Biodefense and Infectious Diseases, Department of Molecular and Microbiology, George Mason University, Manassas, Virginia, United States of America
| | - Serguei Popov
- National Center for Biodefense and Infectious Diseases, Department of Molecular and Microbiology, George Mason University, Manassas, Virginia, United States of America
- * E-mail: (SP); (MCC)
| | - Myung-Chul Chung
- National Center for Biodefense and Infectious Diseases, Department of Molecular and Microbiology, George Mason University, Manassas, Virginia, United States of America
- * E-mail: (SP); (MCC)
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Fang H, Sun C, Xu L, Owen RJ, Auth RD, Snoy PJ, Frucht DM. Neutrophil Elastase Mediates Pathogenic Effects of Anthrax Lethal Toxin in the Murine Intestinal Tract. THE JOURNAL OF IMMUNOLOGY 2010; 185:5463-7. [DOI: 10.4049/jimmunol.1002471] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Chung MC, Jorgensen SC, Popova TG, Tonry JH, Bailey CL, Popov SG. Activation of plasminogen activator inhibitor implicates protease InhA in the acute-phase response to Bacillus anthracis infection. J Med Microbiol 2009; 58:737-744. [PMID: 19429749 DOI: 10.1099/jmm.0.007427-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Anthrax is a zoonotic disease caused by Bacillus anthracis. The infection is associated with inflammation and sepsis, but little is known about the acute-phase response during disease and the nature of the bacterial factors causing it. In this study, we examined the levels of the acute-phase proteins (APPs) in comparative experiments using mice challenged with spores and a purified B. anthracis protease InhA as a possible factor mediating the response. A strong increase in the plasma levels of APPs such as haptoglobin and serum amyloid A was observed during infection. Protein and mRNA levels of plasminogen activator inhibitor (PAI)-1 in the liver were also increased concurrently with bacterial dissemination at 72 h post-infection. Similar effects were observed at 6 h post injection with InhA. Induction of hepatic transforming growth factor-beta1, a PAI-1 inducer, was also found in the liver of InhA-injected mice. PAI-1 elevation by InhA resulted in an increased level of urokinase-type plasminogen activator complex with PAI-1 and a decreased level of D-dimers indicating inhibition of blood fibrinolysis. These results reveal an acute liver response to anthrax infection and provide a plausible pathophysiological link between the host inflammatory response and the pro-thrombotic haemostatic imbalance in the course of disease through PAI-1 induction in the liver.
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Affiliation(s)
- Myung-Chul Chung
- National Center for Biodefense and Infectious Diseases, George Mason University, 10900 University Blvd, Manassas, VA 20110, USA
| | - Shelley C Jorgensen
- National Center for Biodefense and Infectious Diseases, George Mason University, 10900 University Blvd, Manassas, VA 20110, USA
| | - Taissia G Popova
- National Center for Biodefense and Infectious Diseases, George Mason University, 10900 University Blvd, Manassas, VA 20110, USA
| | - Jessica H Tonry
- National Center for Biodefense and Infectious Diseases, George Mason University, 10900 University Blvd, Manassas, VA 20110, USA
| | - Charles L Bailey
- National Center for Biodefense and Infectious Diseases, George Mason University, 10900 University Blvd, Manassas, VA 20110, USA
| | - Serguei G Popov
- National Center for Biodefense and Infectious Diseases, George Mason University, 10900 University Blvd, Manassas, VA 20110, USA
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