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Hildebrand D, Böhringer J, Körner E, Chiriac U, Förmer S, Sähr A, Hoppe-Tichy T, Heeg K, Nurjadi D. Cefiderocol Protects against Cytokine- and Endotoxin-Induced Disruption of Vascular Endothelial Cell Integrity in an In Vitro Experimental Model. Antibiotics (Basel) 2022; 11:581. [PMID: 35625225 PMCID: PMC9137736 DOI: 10.3390/antibiotics11050581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 04/22/2022] [Accepted: 04/26/2022] [Indexed: 11/25/2022] Open
Abstract
The severe course of bloodstream infections with Gram-negative bacilli can lead to organ dysfunctions and compromise the integrity of the vascular barrier, which are the hallmarks of sepsis. This study aimed to investigate the potential effect of cefiderocol on the barrier function of vascular endothelial cells (vECs) in an in vitro experimental set-up. Human umbilical vein cells (HUVECs), co-cultured with erythrocyte-depleted whole blood for up to 48 h, were activated with tumor necrosis factor-alpha (TNF-α) or lipopolysaccharide (LPS) to induce endothelial damage in the absence or presence of cefiderocol (concentrations of 10, 40 and 70 mg/L). The endothelial integrity was quantified using transendothelial electrical resistance (TEER) measurement, performed at 0, 3, 24 and 48 h after stimulation. Stimulation with TNF-α and LPS increased the endothelial permeability assessed by TEER at 24 and 48 h of co-culture. Furthermore, cefiderocol reduces interleukin-6 (IL-6), interleukin-1β (IL-1β) and TNF-α release in peripheral blood mononuclear cells (PBMCs) following LPS stimulation in a dose-dependent manner. Collectively, the data suggest that cefiderocol may have an influence on the cellular immune response and might support the maintenance of vEC integrity during inflammation associated with infection with Gram-negative bacteria, which warrants further investigations.
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Affiliation(s)
- Dagmar Hildebrand
- Medical Microbiology and Hygiene, Department of Infectious Diseases, Heidelberg University Hospital, 69120 Heidelberg, Germany; (J.B.); (E.K.); (S.F.); (A.S.); (K.H.)
| | - Jana Böhringer
- Medical Microbiology and Hygiene, Department of Infectious Diseases, Heidelberg University Hospital, 69120 Heidelberg, Germany; (J.B.); (E.K.); (S.F.); (A.S.); (K.H.)
| | - Eva Körner
- Medical Microbiology and Hygiene, Department of Infectious Diseases, Heidelberg University Hospital, 69120 Heidelberg, Germany; (J.B.); (E.K.); (S.F.); (A.S.); (K.H.)
- Hospital Pharmacy, Heidelberg University Hospital, 69120 Heidelberg, Germany; (U.C.); (T.H.-T.)
| | - Ute Chiriac
- Hospital Pharmacy, Heidelberg University Hospital, 69120 Heidelberg, Germany; (U.C.); (T.H.-T.)
| | - Sandra Förmer
- Medical Microbiology and Hygiene, Department of Infectious Diseases, Heidelberg University Hospital, 69120 Heidelberg, Germany; (J.B.); (E.K.); (S.F.); (A.S.); (K.H.)
| | - Aline Sähr
- Medical Microbiology and Hygiene, Department of Infectious Diseases, Heidelberg University Hospital, 69120 Heidelberg, Germany; (J.B.); (E.K.); (S.F.); (A.S.); (K.H.)
| | - Torsten Hoppe-Tichy
- Hospital Pharmacy, Heidelberg University Hospital, 69120 Heidelberg, Germany; (U.C.); (T.H.-T.)
| | - Klaus Heeg
- Medical Microbiology and Hygiene, Department of Infectious Diseases, Heidelberg University Hospital, 69120 Heidelberg, Germany; (J.B.); (E.K.); (S.F.); (A.S.); (K.H.)
| | - Dennis Nurjadi
- Medical Microbiology and Hygiene, Department of Infectious Diseases, Heidelberg University Hospital, 69120 Heidelberg, Germany; (J.B.); (E.K.); (S.F.); (A.S.); (K.H.)
- Department of Infectious Diseases and Microbiology, University of Lübeck, 23538 Lübeck, Germany
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Nymo S, Gustavsen A, Nilsson PH, Lau C, Espevik T, Mollnes TE. Human Endothelial Cell Activation by Escherichia coli and Staphylococcus aureus Is Mediated by TNF and IL-1β Secondarily to Activation of C5 and CD14 in Whole Blood. THE JOURNAL OF IMMUNOLOGY 2016; 196:2293-9. [PMID: 26800874 DOI: 10.4049/jimmunol.1502220] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 12/22/2015] [Indexed: 11/19/2022]
Abstract
Endothelial cells (EC) play a central role in inflammation. E-selectin and ICAM-1 expression are essential for leukocyte recruitment and are good markers of EC activation. Most studies of EC activation are done in vitro using isolated mediators. The aim of the present study was to examine the relative importance of pattern recognition systems and downstream mediators in bacteria-induced EC activation in a physiological relevant human model, using EC incubated with whole blood. HUVEC were incubated with human whole blood. Escherichia coli- and Staphylococcus aureus-induced EC activation was measured by E-selectin and ICAM-1 expression using flow cytometry. The mAb 18D11 was used to neutralize CD14, and the lipid A analog eritoran was used to block TLR4/MD2. C5 cleavage was inhibited using eculizumab, and C5aR1 was blocked by an antagonist. Infliximab and canakinumab were used to neutralize TNF and IL-1β. The EC were minimally activated when bacteria were incubated in serum, whereas a substantial EC activation was seen when the bacteria were incubated in whole blood. E. coli-induced activation was largely CD14-dependent, whereas S. aureus mainly caused a C5aR1-mediated response. Combined CD14 and C5 inhibition reduced E-selectin and ICAM-1 expression by 96 and 98% for E. coli and by 70 and 75% for S. aureus. Finally, the EC activation by both bacteria was completely abolished by combined inhibition of TNF and IL-1β. E. coli and S. aureus activated EC in a CD14- and C5-dependent manner with subsequent leukocyte secretion of TNF and IL-1β mediating the effect.
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Affiliation(s)
- Stig Nymo
- Research Laboratory, Nordland Hospital, 8092 Bodø, Norway; Faculty of Health Sciences, K. G. Jebsen Thrombosis Research and Expertise Center, University of Tromsø, 9037 Tromsø, Norway; Department of Immunology, Oslo University Hospital, Rikshospitalet, University of Oslo, 0424 Oslo, Norway; K. G. Jebsen Inflammation Research Center, University of Oslo, 0424 Oslo, Norway
| | - Alice Gustavsen
- Department of Immunology, Oslo University Hospital, Rikshospitalet, University of Oslo, 0424 Oslo, Norway; K. G. Jebsen Inflammation Research Center, University of Oslo, 0424 Oslo, Norway
| | - Per H Nilsson
- Department of Immunology, Oslo University Hospital, Rikshospitalet, University of Oslo, 0424 Oslo, Norway; K. G. Jebsen Inflammation Research Center, University of Oslo, 0424 Oslo, Norway
| | - Corinna Lau
- Research Laboratory, Nordland Hospital, 8092 Bodø, Norway; Faculty of Health Sciences, K. G. Jebsen Thrombosis Research and Expertise Center, University of Tromsø, 9037 Tromsø, Norway
| | - Terje Espevik
- Center of Molecular Inflammation Research, Norwegian University of Science and Technology, 7491 Trondheim, Norway; and Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Tom Eirik Mollnes
- Research Laboratory, Nordland Hospital, 8092 Bodø, Norway; Faculty of Health Sciences, K. G. Jebsen Thrombosis Research and Expertise Center, University of Tromsø, 9037 Tromsø, Norway; Department of Immunology, Oslo University Hospital, Rikshospitalet, University of Oslo, 0424 Oslo, Norway; K. G. Jebsen Inflammation Research Center, University of Oslo, 0424 Oslo, Norway; Center of Molecular Inflammation Research, Norwegian University of Science and Technology, 7491 Trondheim, Norway; and
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Nymo S, Niyonzima N, Espevik T, Mollnes TE. Cholesterol crystal-induced endothelial cell activation is complement-dependent and mediated by TNF. Immunobiology 2014; 219:786-92. [PMID: 25053140 DOI: 10.1016/j.imbio.2014.06.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 06/26/2014] [Indexed: 11/16/2022]
Abstract
Cholesterol crystals are known to be a hallmark of atherosclerosis with recent studies demonstrating deposition of these crystals in early fatty streak formation as well as penetrating the intima following plaque rupture. Inflammation has also become a central focus in atheroma development and endothelial cell activation is recognized as necessary for the recruitment of inflammatory cells to the plaque. However, the extent to which cholesterol crystals can induce inflammation and activate endothelial cells is not known. To investigate this, we developed a novel model activating human umbilical vein endothelial cells using lepirudin anticoagulated human whole blood. We found that cholesterol crystals caused a marked and dose-dependent increase in the adhesion molecules E-selectin and ICAM-1 on the surface of the endothelial cells after incubation with whole blood. There was no activation of the cells when the crystals were incubated in medium alone, or in human serum, despite substantial crystal-induced complement activation in serum. Complement inhibitors at the C3 and C5 levels reduced the whole blood induced endothelial cell activation by up to 89% (p<0.05) and abolished TNF release (p<0.01). Finally, the TNF inhibitor infliximab reduced endothelial activation to background levels (p<0.05). In conclusion, these data demonstrate that endothelial activation by cholesterol crystals is mediated by complement-dependent TNF release, and suggests that complement-inhibition might have a role in alleviating atherosclerosis-induced inflammation.
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Affiliation(s)
- Stig Nymo
- Department of Laboratory Medicine, Nordland Hospital, Bodø, Norway.
| | - Nathalie Niyonzima
- Institute of Clinical Medicine, University of Tromsø, Tromsø, Norway; Centre of Molecular Inflammation Research, Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - Terje Espevik
- Institute of Clinical Medicine, University of Tromsø, Tromsø, Norway; Centre of Molecular Inflammation Research, Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - Tom Eirik Mollnes
- Department of Laboratory Medicine, Nordland Hospital, Bodø, Norway; Institute of Clinical Medicine, University of Tromsø, Tromsø, Norway; Centre of Molecular Inflammation Research, Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway; Department of Immunology, Oslo University Hospital Rikshospitalet, Oslo, Norway; K.G. Jebsen IRC, University of Oslo, Oslo, Norway
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Pigozzo AB, Macedo GC, Santos RWD, Lobosco M. On the computational modeling of the innate immune system. BMC Bioinformatics 2013; 14 Suppl 6:S7. [PMID: 23734602 PMCID: PMC3633047 DOI: 10.1186/1471-2105-14-s6-s7] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
In recent years, there has been an increasing interest in the mathematical and computational modeling of the human immune system (HIS). Computational models of HIS dynamics may contribute to a better understanding of the relationship between complex phenomena and immune response; in addition, computational models will support the development of new drugs and therapies for different diseases. However, modeling the HIS is an extremely difficult task that demands a huge amount of work to be performed by multidisciplinary teams. In this study, our objective is to model the spatio-temporal dynamics of representative cells and molecules of the HIS during an immune response after the injection of lipopolysaccharide (LPS) into a section of tissue. LPS constitutes the cellular wall of Gram-negative bacteria, and it is a highly immunogenic molecule, which means that it has a remarkable capacity to elicit strong immune responses. We present a descriptive, mechanistic and deterministic model that is based on partial differential equations (PDE). Therefore, this model enables the understanding of how the different complex phenomena interact with structures and elements during an immune response. In addition, the model's parameters reflect physiological features of the system, which makes the model appropriate for general use.
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Affiliation(s)
- Alexandre Bittencourt Pigozzo
- Universidade Federal de Juiz de Fora, Campus Universitário, Bairro São Pedro, Rua José Lourenço Kelmer s/n, Juiz de Fora, MG, Brazil.
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