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van Leeuwen ALI, Dekker NAM, Ibelings R, Tuip-de Boer AM, van Meurs M, Molema G, van den Brom CE. Modulation of angiopoietin-2 and Tie2: Organ specific effects of microvascular leakage and edema in mice. Microvasc Res 2024; 154:104694. [PMID: 38723844 DOI: 10.1016/j.mvr.2024.104694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 04/25/2024] [Accepted: 05/04/2024] [Indexed: 05/13/2024]
Abstract
INTRODUCTION Critical illness is associated with organ failure, in which endothelial hyperpermeability and tissue edema play a major role. The endothelial angiopoietin/Tie2 system, a regulator of endothelial permeability, is dysbalanced during critical illness. Elevated circulating angiopoietin-2 and decreased Tie2 receptor levels are reported, but it remains unclear whether they cause edema independent of other critical illness-associated alterations. Therefore, we have studied the effect of angiopoietin-2 administration and/or reduced Tie2 expression on microvascular leakage and edema under normal conditions. METHODS Transgenic male mice with partial deletion of Tie2 (heterozygous exon 9 deletion, Tie2+/-) and wild-type controls (Tie2+/+) received 24 or 72 pg/g angiopoietin-2 or PBS as control (n = 12 per group) intravenously. Microvascular leakage and edema were determined by Evans blue dye (EBD) extravasation and wet-to-dry weight ratio, respectively, in lungs and kidneys. Expression of molecules related to endothelial angiopoietin/Tie2 signaling were determined by ELISA and RT-qPCR. RESULTS In Tie2+/+ mice, angiopoietin-2 administration increased EBD extravasation (154 %, p < 0.05) and wet-to-dry weight ratio (133 %, p < 0.01) in lungs, but not in the kidney compared to PBS. Tie2+/- mice had higher pulmonary (143 %, p < 0.001), but not renal EBD extravasation, compared to wild-type control mice, whereas a more pronounced wet-to-dry weight ratio was observed in lungs (155 %, p < 0.0001), in contrast to a minor higher wet-to-dry weight ratio in kidneys (106 %, p < 0.05). Angiopoietin-2 administration to Tie2+/- mice did not further increase pulmonary EBD extravasation, pulmonary wet-to-dry weight ratio, or renal wet-to-dry weight ratio. Interestingly, angiopoietin-2 administration resulted in an increased renal EBD extravasation in Tie2+/- mice compared to Tie2+/- mice receiving PBS. Both angiopoietin-2 administration and partial deletion of Tie2 did not affect circulating angiopoietin-1, soluble Tie2, VEGF and NGAL as well as gene expression of angiopoietin-1, -2, Tie1, VE-PTP, ELF-1, Ets-1, KLF2, GATA3, MMP14, Runx1, VE-cadherin, VEGFα and NGAL, except for gene and protein expression of Tie2, which was decreased in Tie2+/- mice compared to Tie2+/+ mice. CONCLUSIONS In mice, the microvasculature of the lungs is more vulnerable to angiopoietin-2 and partial deletion of Tie2 compared to those in the kidneys with respect to microvascular leakage and edema.
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Affiliation(s)
- Anoek L I van Leeuwen
- Department of Anesthesiology, Amsterdam UMC, VU University, Amsterdam, the Netherlands; Department of Physiology, Amsterdam UMC, VU University, Amsterdam, the Netherlands
| | - Nicole A M Dekker
- Department of Anesthesiology, Amsterdam UMC, VU University, Amsterdam, the Netherlands; Department of Physiology, Amsterdam UMC, VU University, Amsterdam, the Netherlands
| | - Roselique Ibelings
- Department of Anesthesiology, Amsterdam UMC, VU University, Amsterdam, the Netherlands; Laboratory of Experimental Intensive Care and Anesthesiology, Amsterdam UMC, University of Amsterdam, the Netherlands
| | - Anita M Tuip-de Boer
- Department of Intensive Care Medicine, Amsterdam UMC, University of Amsterdam, the Netherlands; Laboratory of Experimental Intensive Care and Anesthesiology, Amsterdam UMC, University of Amsterdam, the Netherlands
| | - Matijs van Meurs
- Department of Pathology and Medical Biology, University Medical Center Groningen, Groningen, the Netherlands; Department of Critical Care, University Medical Center Groningen, Groningen, the Netherlands
| | - Grietje Molema
- Department of Pathology and Medical Biology, University Medical Center Groningen, Groningen, the Netherlands
| | - Charissa E van den Brom
- Department of Anesthesiology, Amsterdam UMC, VU University, Amsterdam, the Netherlands; Department of Intensive Care Medicine, Amsterdam UMC, University of Amsterdam, the Netherlands; Laboratory of Experimental Intensive Care and Anesthesiology, Amsterdam UMC, University of Amsterdam, the Netherlands.
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McMullan RR, McAuley DF, O'Kane CM, Silversides JA. Vascular leak in sepsis: physiological basis and potential therapeutic advances. Crit Care 2024; 28:97. [PMID: 38521954 PMCID: PMC10961003 DOI: 10.1186/s13054-024-04875-6] [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: 08/24/2023] [Accepted: 03/14/2024] [Indexed: 03/25/2024] Open
Abstract
Sepsis is a life-threatening condition characterised by endothelial barrier dysfunction and impairment of normal microcirculatory function, resulting in a state of hypoperfusion and tissue oedema. No specific pharmacological therapies are currently used to attenuate microvascular injury. Given the prominent role of endothelial breakdown and microcirculatory dysfunction in sepsis, there is a need for effective strategies to protect the endothelium. In this review we will discuss key mechanisms and putative therapeutic agents relevant to endothelial barrier function.
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Affiliation(s)
- Ross R McMullan
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University of Belfast, Lisburn Road, Belfast, BT9 7BL, UK.
| | - Daniel F McAuley
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University of Belfast, Lisburn Road, Belfast, BT9 7BL, UK
- Department of Critical Care, Belfast Health and Social Care Trust, Belfast, UK
| | - Cecilia M O'Kane
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University of Belfast, Lisburn Road, Belfast, BT9 7BL, UK
| | - Jonathan A Silversides
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University of Belfast, Lisburn Road, Belfast, BT9 7BL, UK
- Department of Critical Care, Belfast Health and Social Care Trust, Belfast, UK
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Alibeg AAA, Mohammed MH. Molecular docking, synthesis, characteristics and preliminary cytotoxic study of new coumarin-sulfonamide derivatives as histone deacetylase inhibitors. WIADOMOSCI LEKARSKIE (WARSAW, POLAND : 1960) 2024; 77:514-525. [PMID: 38691794 DOI: 10.36740/wlek202403118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
OBJECTIVE Aim: To evaluate the cytotoxic activity of newly synthesized a series of novel HDAC inhibitors comprising sulfonamide as zinc binding group and Coumarin as cap groups. PATIENTS AND METHODS Materials and Methods: The utilization of sulfonamide as zinc binding group and Coumarin as cap groups known to possess antitumor activity in the designed of new histone deacetylase inhibitors and using the docking and MTT assay to evaluate the compounds. RESULTS Results: Four compounds have been synthesized and characterized successfully by ART-FTIR, NMR and ESI-Ms. The synthesized compound assessed for their cytotoxic activity against hepatoblastoma HepG2 (IC50, I=0.094, II=0.040, III=0.032, IV=0.046, SAHA=0.141) and human colon adenocarcinoma MCF-7 (IC50, I=0.135, II=0.050, III= 0.065, IV=0.059, SAHA=0.107). The binding mode to the active site of [HDAC6] were determined by docking study which give results that they might be good inhibitors for [HDAC6]. CONCLUSION Conclusions: The synthesized compounds (I, II, III and IV) showed a comparable cytotoxic result with FDA approved drug (SAHA) toward HepG2 and MCF-7 cancer cell lines and their docking analysis provided a preliminary indication that they are viable [HDAC6] candidates.
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Peng L, Li H, Zhang C, Jiang W. Activating α7nAChR suppresses systemic inflammation by mitigating neuroinflammation of the medullary visceral zone in sepsis in a rat model. Transl Neurosci 2024; 15:20220345. [PMID: 39156045 PMCID: PMC11330160 DOI: 10.1515/tnsci-2022-0345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 06/29/2024] [Accepted: 07/01/2024] [Indexed: 08/20/2024] Open
Abstract
Our previous studies have shown that activating α7nAChRs suppresses systemic inflammation and immunity through the cholinergic anti-inflammatory pathway (CAP) in early sepsis. Now that the medullary visceral zone (MVZ) is the center of CAP and responsible for regulating systemic inflammation, what changes will occur in MVZ's pathology and function in sepsis, especially when interfering with α7nAChRs? Does activation of MVZ's α7nAChRs contribute to the inhibition of systemic inflammation? To clarify these issues, we explored the systemic inflammation and immunity state by detecting serum levels of TNF-α, IL-6, HMGB1, sCD14, and CD4+CD25+Treg and TH17 lymphocytes percentage, meanwhile, we analyzed the apoptosis of cholinergic and catecholaminergic neurons and the expressions of tyrosine hydroxylase (TH) and choline acetyltransferase (CHAT) in MVZ in sepsis and the interfering effects on α7nAChRs. In this study, we found that in sepsis, serum TNF-α, IL-6, HMGB1, sCD14, CD4+CD25+Treg, and TH17 lymphocytes significantly increased and the ratio of Treg/TH17 significantly decreased, cholinergic and catecholaminergic neurons underwent apoptosis with low expressions of TH and CHAT in MVZ; activation of α7nAChRs not only significantly decreased the levels of septic serum TNF-α, IL-6, HMGB1, sCD14, and TH17 lymphocytes (P < 0.05), but also significantly reduced cholinergic and catecholaminergic neurons' apoptosis, and promoted expressions of TH/CHAT. Our study reveals that sepsis undermines MVZ through neuroinflammation which contributes to the uncontrolled systemic inflammation. Activating central α7nAChRs is not only helpful to restore MVZ's structure and function but also beneficial to subside the inflammatory storm in sepsis. Even if MVZ is damaged in sepsis, cholinergic neurons in MVZ still regulate the systemic inflammation stably.
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Affiliation(s)
- Lin Peng
- Department of Gynecologic Oncology of Hubei Cancer Hospital, Hubei Province, 430079, Wuhan, China
| | - Hongbing Li
- Emergency Department of the First People’s Hospital, Guiyang, Guizhou Province, 550002, China
| | - Cheng Zhang
- Emergency Department of the First People’s Hospital, Guiyang, Guizhou Province, 550002, China
| | - Weiwei Jiang
- Emergency Department of the First People’s Hospital, Guiyang, Guizhou Province, 550002, China
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Saravi B, Goebel U, Hassenzahl LO, Jung C, David S, Feldheiser A, Stopfkuchen-Evans M, Wollborn J. Capillary leak and endothelial permeability in critically ill patients: a current overview. Intensive Care Med Exp 2023; 11:96. [PMID: 38117435 PMCID: PMC10733291 DOI: 10.1186/s40635-023-00582-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 12/12/2023] [Indexed: 12/21/2023] Open
Abstract
Capillary leak syndrome (CLS) represents a phenotype of increased fluid extravasation, resulting in intravascular hypovolemia, extravascular edema formation and ultimately hypoperfusion. While endothelial permeability is an evolutionary preserved physiological process needed to sustain life, excessive fluid leak-often caused by systemic inflammation-can have detrimental effects on patients' outcomes. This article delves into the current understanding of CLS pathophysiology, diagnosis and potential treatments. Systemic inflammation leading to a compromise of endothelial cell interactions through various signaling cues (e.g., the angiopoietin-Tie2 pathway), and shedding of the glycocalyx collectively contribute to the manifestation of CLS. Capillary permeability subsequently leads to the seepage of protein-rich fluid into the interstitial space. Recent insights into the importance of the sub-glycocalyx space and preserving lymphatic flow are highlighted for an in-depth understanding. While no established diagnostic criteria exist and CLS is frequently diagnosed by clinical characteristics only, we highlight more objective serological and (non)-invasive measurements that hint towards a CLS phenotype. While currently available treatment options are limited, we further review understanding of fluid resuscitation and experimental approaches to target endothelial permeability. Despite the improved understanding of CLS pathophysiology, efforts are needed to develop uniform diagnostic criteria, associate clinical consequences to these criteria, and delineate treatment options.
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Affiliation(s)
- Babak Saravi
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA.
- Department of Orthopedics and Trauma Surgery, Faculty of Medicine, Medical Center, University of Freiburg, University of Freiburg, Freiburg, Germany.
| | - Ulrich Goebel
- Department of Anesthesiology and Critical Care, St. Franziskus-Hospital, Muenster, Germany
| | - Lars O Hassenzahl
- Department of Anaesthesiology, Intensive Care Medicine and Pain Therapy, University Hospital Frankfurt, Goethe University, Frankfurt, Germany
| | - Christian Jung
- Department of Cardiology, Pulmonology and Vascular Medicine, Heinrich-Heine-University, Duesseldorf, Germany
| | - Sascha David
- Institute of Intensive Care Medicine, University Hospital Zurich, Zurich, Switzerland
| | - Aarne Feldheiser
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, Evang. Kliniken Essen-Mitte, Huyssens-Stiftung/Knappschaft, University of Essen, Essen, Germany
| | - Matthias Stopfkuchen-Evans
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Jakob Wollborn
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
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van Leeuwen ALI, Beijer E, Ibelings R, Dekker NAM, van der Steen MRA, Roelofs JJTH, van Meurs M, Molema G, van den Brom CE. Female sex protects against renal edema, but not lung edema, in mice with partial deletion of the endothelial barrier regulator Tie2 compared to male sex. PLoS One 2023; 18:e0293673. [PMID: 37972011 PMCID: PMC10653528 DOI: 10.1371/journal.pone.0293673] [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] [Received: 04/19/2023] [Accepted: 10/18/2023] [Indexed: 11/19/2023] Open
Abstract
BACKGROUND The endothelial angiopoietin/Tie2 system is an important regulator of endothelial permeability and targeting Tie2 reduces hemorrhagic shock-induced organ edema in males. However, sexual dimorphism of the endothelium has not been taken into account. This study investigated whether there are sex-related differences in the endothelial angiopoietin/Tie2 system and edema formation. METHODS Adult male and female heterozygous Tie2 knockout mice (Tie2+/-) and wild-type controls (Tie2+/+) were included (n = 9 per group). Renal and pulmonary injury were determined by wet/dry weight ratio and H&E staining of tissue sections. Protein levels were studied in plasma by ELISA and pulmonary and renal mRNA expression levels by RT-qPCR. RESULTS In Tie2+/+ mice, females had higher circulating angiopoietin-2 (138%, p<0.05) compared to males. Gene expression of angiopoietin-1 (204%, p<0.01), angiopoietin-2 (542%, p<0.001) were higher in females compared to males in kidneys, but not in lungs. Gene expression of Tie2, Tie1 and VE-PTP were similar between males and females in both organs. Renal and pulmonary wet/dry weight ratio did not differ between Tie2+/+ females and males. Tie2+/+ females had lower circulating NGAL (41%, p<0.01) compared to males, whereas renal NGAL and KIM1 gene expression was unaffected. Interestingly, male Tie2+/- mice had 28% higher renal wet/dry weight ratio (p<0.05) compared to Tie2+/+ males, which was not observed in females nor in lungs. Partial deletion of Tie2 did not affect circulating angiopoietin-1 or angiopoietin-2, but soluble Tie2 was 44% and 53% lower in males and females, respectively, compared to Tie2+/+ mice of the same sex. Renal and pulmonary gene expression of angiopoietin-1, angiopoietin-2, estrogen receptors and other endothelial barrier regulators was comparable between Tie2+/- and Tie2+/+ mice in both sexes. CONCLUSION Female sex seems to protect against renal, but not pulmonary edema in heterozygous Tie2 knock-out mice. This could not be explained by sex dimorphism in the endothelial angiopoietin/Tie2 system.
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Affiliation(s)
- Anoek L. I. van Leeuwen
- Department of Anesthesiology, Amsterdam UMC, VU University, Amsterdam, The Netherlands
- Department of Physiology, Amsterdam UMC, VU University, Amsterdam, The Netherlands
| | - Elise Beijer
- Department of Anesthesiology, Amsterdam UMC, VU University, Amsterdam, The Netherlands
- Department of Surgery, Amsterdam UMC, VU University, Amsterdam, The Netherlands
- Laboratory of Experimental Intensive Care and Anesthesiology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Roselique Ibelings
- Department of Anesthesiology, Amsterdam UMC, VU University, Amsterdam, The Netherlands
- Laboratory of Experimental Intensive Care and Anesthesiology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Nicole A. M. Dekker
- Department of Anesthesiology, Amsterdam UMC, VU University, Amsterdam, The Netherlands
| | | | - Joris J. T. H. Roelofs
- Department of Pathology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Matijs van Meurs
- Department of Critical Care, University Medical Center Groningen, Groningen, the Netherlands
- Department of Pathology and Medical Biology, University Medical Center Groningen, Groningen, The Netherlands
| | - Grietje Molema
- Department of Pathology and Medical Biology, University Medical Center Groningen, Groningen, The Netherlands
| | - Charissa E. van den Brom
- Department of Anesthesiology, Amsterdam UMC, VU University, Amsterdam, The Netherlands
- Laboratory of Experimental Intensive Care and Anesthesiology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
- Department of Intensive Care Medicine, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
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Schafer CM, Martin-Almedina S, Kurylowicz K, Dufton N, Osuna-Almagro L, Wu ML, Johnson CF, Shah AV, Haskard DO, Buxton A, Willis E, Wheeler K, Turner S, Chlebicz M, Scott RP, Kovats S, Cleuren A, Birdsey GM, Randi AM, Griffin CT. Cytokine-Mediated Degradation of the Transcription Factor ERG Impacts the Pulmonary Vascular Response to Systemic Inflammatory Challenge. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.02.08.527788. [PMID: 36798267 PMCID: PMC9934599 DOI: 10.1101/2023.02.08.527788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Background During infectious diseases, pro-inflammatory cytokines transiently destabilize interactions between adjacent vascular endothelial cells (ECs) to facilitate the passage of immune molecules and cells into tissues. However, in the lung the resulting vascular hyperpermeability can lead to organ dysfunction. Previous work identified the transcription factor ERG as a master regulator of endothelial homeostasis. Here we investigate whether the sensitivity of pulmonary blood vessels to cytokine-induced destabilization is due to organotypic mechanisms affecting the ability of endothelial ERG to protect lung ECs from inflammatory injury. Methods Cytokine-dependent ubiquitination and proteasomal degradation of ERG was analyzed in cultured Human Umbilical Vein ECs (HUVECs). Systemic administration of TNFα or the bacterial cell wall component lipopolysaccharide (LPS) was used to cause a widespread inflammatory challenge in mice; ERG protein levels were assessed by immunoprecipitation, immunoblot, and immunofluorescence. Murine Erg deletion was genetically induced in ECs ( Erg fl/fl ;Cdh5(PAC)Cre ERT2 ), and multiple organs were analyzed by histology, immunostaining, and electron microscopy. Results In vitro, TNFα promoted the ubiquitination and degradation of ERG in HUVECs, which was blocked by the proteasomal inhibitor MG132. In vivo, systemic administration of TNFα or LPS resulted in a rapid and substantial degradation of ERG within lung ECs, but not ECs of the retina, heart, liver, or kidney. Pulmonary ERG was also downregulated in a murine model of influenza infection. Erg fl/fl ;Cdh5(PAC)-Cre ERT2 mice spontaneously recapitulated aspects of inflammatory challenges, including lung-predominant vascular hyperpermeability, immune cell recruitment, and fibrosis. These phenotypes were associated with a lung-specific decrease in the expression of Tek , a gene target of ERG previously implicated in maintaining pulmonary vascular stability during inflammation. Conclusions Collectively, our data highlight a unique role for ERG in pulmonary vascular function. We propose that cytokine-induced ERG degradation and subsequent transcriptional changes in lung ECs play critical roles in the destabilization of pulmonary blood vessels during infectious diseases.
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Fatmi A, Saadi W, Beltrán-García J, García-Giménez JL, Pallardó FV. The Endothelial Glycocalyx and Neonatal Sepsis. Int J Mol Sci 2022; 24:ijms24010364. [PMID: 36613805 PMCID: PMC9820255 DOI: 10.3390/ijms24010364] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/12/2022] [Accepted: 12/20/2022] [Indexed: 12/28/2022] Open
Abstract
Sepsis carries a substantial risk of morbidity and mortality in newborns, especially preterm-born neonates. Endothelial glycocalyx (eGC) is a carbohydrate-rich layer lining the vascular endothelium, with important vascular barrier function and cell adhesion properties, serving also as a mechano-sensor for blood flow. eGC shedding is recognized as a fundamental pathophysiological process generating microvascular dysfunction, which in turn contributes to multiple organ failure and death in sepsis. Although the disruption of eGC and its consequences have been investigated intensively in the adult population, its composition, development, and potential mechanisms of action are still poorly studied during the neonatal period, and more specifically, in neonatal sepsis. Further knowledge on this topic may provide a better understanding of the molecular mechanisms that guide the sepsis pathology during the neonatal period, and would increase the usefulness of endothelial glycocalyx dysfunction as a diagnostic and prognostic biomarker. We reviewed several components of the eGC that help to deeply understand the mechanisms involved in the eGC disruption during the neonatal period. In addition, we evaluated the potential of eGC components as biomarkers and future targets to develop therapeutic strategies for neonatal sepsis.
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Affiliation(s)
- Ahlam Fatmi
- INCLIVA Health Research Institute, Mixed Unit for Rare Diseases INCLIVA-CIPF, 46010 Valencia, Spain
| | - Wiam Saadi
- Department of Biology, Faculty of Nature, Life and Earth Sciences, University of Djillali Bounaama, Khemis Miliana 44225, Algeria
| | - Jesús Beltrán-García
- Center for Biomedical Network Research on Rare Diseases (CIBERER), Institute of Health Carlos III, 46010 Valencia, Spain
- Department of Physiology, Faculty of Medicine and Dentistry, University of Valencia, 46010 Valencia, Spain
- Department of Medicine, Division of Regenerative Medicine, University of California, San Diego, CA 92093, USA
| | - José Luis García-Giménez
- INCLIVA Health Research Institute, Mixed Unit for Rare Diseases INCLIVA-CIPF, 46010 Valencia, Spain
- Center for Biomedical Network Research on Rare Diseases (CIBERER), Institute of Health Carlos III, 46010 Valencia, Spain
- Department of Physiology, Faculty of Medicine and Dentistry, University of Valencia, 46010 Valencia, Spain
- Correspondence: ; Tel.: +34-386-46-46
| | - Federico V. Pallardó
- INCLIVA Health Research Institute, Mixed Unit for Rare Diseases INCLIVA-CIPF, 46010 Valencia, Spain
- Center for Biomedical Network Research on Rare Diseases (CIBERER), Institute of Health Carlos III, 46010 Valencia, Spain
- Department of Physiology, Faculty of Medicine and Dentistry, University of Valencia, 46010 Valencia, Spain
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Luxen M, van Meurs M, Molema G. Unlocking the Untapped Potential of Endothelial Kinase and Phosphatase Involvement in Sepsis for Drug Treatment Design. Front Immunol 2022; 13:867625. [PMID: 35634305 PMCID: PMC9136877 DOI: 10.3389/fimmu.2022.867625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 03/28/2022] [Indexed: 11/29/2022] Open
Abstract
Sepsis is a devastating clinical condition that can lead to multiple organ failure and death. Despite advancements in our understanding of molecular mechanisms underlying sepsis and sepsis-associated multiple organ failure, no effective therapeutic treatment to directly counteract it has yet been established. The endothelium is considered to play an important role in sepsis. This review highlights a number of signal transduction pathways involved in endothelial inflammatory activation and dysregulated endothelial barrier function in response to sepsis conditions. Within these pathways – NF-κB, Rac1/RhoA GTPases, AP-1, APC/S1P, Angpt/Tie2, and VEGF/VEGFR2 – we focus on the role of kinases and phosphatases as potential druggable targets for therapeutic intervention. Animal studies and clinical trials that have been conducted for this purpose are discussed, highlighting reasons why they might not have resulted in the expected outcomes, and which lessons can be learned from this. Lastly, opportunities and challenges that sepsis and sepsis-associated multiple organ failure research are currently facing are presented, including recommendations on improved experimental design to increase the translational power of preclinical research to the clinic.
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Affiliation(s)
- Matthijs Luxen
- Department of Pathology and Medical Biology, Medical Biology Section, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
- Department of Critical Care, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
- *Correspondence: Matthijs Luxen,
| | - Matijs van Meurs
- Department of Pathology and Medical Biology, Medical Biology Section, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
- Department of Critical Care, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Grietje Molema
- Department of Pathology and Medical Biology, Medical Biology Section, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
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Endothelial glycocalyx degradation during sepsis: Causes and consequences. Matrix Biol Plus 2021; 12:100094. [PMID: 34917925 PMCID: PMC8668992 DOI: 10.1016/j.mbplus.2021.100094] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/21/2021] [Accepted: 11/23/2021] [Indexed: 12/23/2022] Open
Abstract
The endothelial glycocalyx is a ubiquitous intravascular structure essential for vascular homeostasis. During sepsis, the glycocalyx is degraded via the collective action of a variety of redundant sheddases, the regulation of which remains the focus of active investigation. Septic loss of the glycocalyx imparts both local vascular injury (leading to acute respiratory distress syndrome and acute kidney injury) as well as the systemic consequences of circulating glycosaminoglycan fragments (leading to cognitive dysfunction). Glycocalyx degradation during sepsis is potentially shaped by clinically-modifiable factors, suggesting opportunities for therapeutic intervention to mitigate the end-organ consequences of sepsis.
The glycocalyx is a ubiquitous structure found on endothelial cells that extends into the vascular lumen. It is enriched in proteoglycans, which are proteins attached to the glycosaminoglycans heparan sulfate, chondroitin sulfate, dermatan sulfate, keratan sulfate, and hyaluronic acid. In health and disease, the endothelial glycocalyx is a central regulator of vascular permeability, inflammation, coagulation, and circulatory tonicity. During sepsis, a life-threatening syndrome seen commonly in hospitalized patients, the endothelial glycocalyx is degraded, significantly contributing to its many clinical manifestations. In this review we discuss the intrinsically linked mechanisms responsible for septic endothelial glycocalyx destruction: glycosaminoglycan degradation and proteoglycan cleavage. We then examine the consequences of local endothelial glycocalyx loss to several organ systems and the systemic consequences of shed glycocalyx constituents. Last, we explore clinically relevant non-modifiable and modifiable factors that exacerbate or protect against endothelial glycocalyx shedding during sepsis.
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Key Words
- ADAM, A Disintegrin and Metalloproteinase
- ANP, Atrial Natriuretic Peptide
- ARDS, Acute respiratory distress syndrome
- Ang2, Angiopoietin-2
- DAMP, Damage-associated Molecular Pattern
- Endothelial glycocalyx
- FFP, Fresh Frozen Plasma
- GAG, Glycosaminoglycan
- Glycosaminoglycans
- HPSE-1/2, Heparanase-1/2
- LPS, Lipopolysaccharide
- MMP, Matrix Metalloproteinase
- PG, Proteoglycan
- Proteoglycans
- Sepsis
- TIMP, Tissue inhibitors of matrix metalloproteinase
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Schmaier AA, Pajares Hurtado GM, Manickas-Hill ZJ, Sack KD, Chen SM, Bhambhani V, Quadir J, Nath AK, Collier ARY, Ngo D, Barouch DH, Shapiro NI, Gerszten RE, Yu XG, Peters KG, Flaumenhaft R, Parikh SM. Tie2 activation protects against prothrombotic endothelial dysfunction in COVID-19. JCI Insight 2021; 6:e151527. [PMID: 34506304 PMCID: PMC8564889 DOI: 10.1172/jci.insight.151527] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 09/09/2021] [Indexed: 12/27/2022] Open
Abstract
Endothelial dysfunction accompanies the microvascular thrombosis commonly observed in severe COVID-19. Constitutively, the endothelial surface is anticoagulant, a property maintained at least in part via signaling through the Tie2 receptor. During inflammation, the Tie2 antagonist angiopoietin-2 (Angpt-2) is released from endothelial cells and inhibits Tie2, promoting a prothrombotic phenotypic shift. We sought to assess whether severe COVID-19 is associated with procoagulant endothelial dysfunction and alterations in the Tie2/angiopoietin axis. Primary HUVECs treated with plasma from patients with severe COVID-19 upregulated the expression of thromboinflammatory genes, inhibited the expression of antithrombotic genes, and promoted coagulation on the endothelial surface. Pharmacologic activation of Tie2 with the small molecule AKB-9778 reversed the prothrombotic state induced by COVID-19 plasma in primary endothelial cells. Lung autopsies from patients with COVID-19 demonstrated a prothrombotic endothelial signature. Assessment of circulating endothelial markers in a cohort of 98 patients with mild, moderate, or severe COVID-19 revealed endothelial dysfunction indicative of a prothrombotic state. Angpt-2 concentrations rose with increasing disease severity, and the highest levels were associated with worse survival. These data highlight the disruption of Tie2/angiopoietin signaling and procoagulant changes in endothelial cells in severe COVID-19. Our findings provide rationale for current trials of Tie2-activating therapy with AKB-9778 in COVID-19.
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Affiliation(s)
- Alec A. Schmaier
- Division of Cardiovascular Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
| | | | | | - Kelsey D. Sack
- Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
- Division of Pulmonary, Critical Care and Sleep Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
- Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Siyu M. Chen
- Cardiovascular Research Center, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
| | - Victoria Bhambhani
- Cardiovascular Research Center, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
| | - Juweria Quadir
- Cardiovascular Research Center, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
| | - Anjali K. Nath
- Cardiovascular Research Center, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
| | | | - Debby Ngo
- Division of Pulmonary, Critical Care and Sleep Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
| | - Dan H. Barouch
- Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
- Center for Virology and Vaccine Research, and
| | - Nathan I. Shapiro
- Department of Emergency Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
| | - Robert E. Gerszten
- Division of Cardiovascular Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
| | - Xu G. Yu
- Ragon Institute of MGH, MIT and Harvard, Cambridge, Massachusetts, USA
- Infectious Diseases Division, Brigham and Women’s Hospital and Harvard Medical School, Massachusetts, Boston USA
| | - MGH COVID-19 Collection and Processing Team
- Ragon Institute of MGH, MIT and Harvard, Cambridge, Massachusetts, USA
- Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA
- The MGH COVID-19 Collection and Processing Team is detailed in Supplemental Acknowledgments
| | | | | | - Samir M. Parikh
- Division of Nephrology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
- Division of Nephrology, University of Texas Southwestern, Dallas, Texas, USA
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12
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Idowu TO, Etzrodt V, Pape T, Heineke J, Stahl K, Haller H, David S. Flow-dependent regulation of endothelial Tie2 by GATA3 in vivo. Intensive Care Med Exp 2021; 9:38. [PMID: 34337671 PMCID: PMC8326239 DOI: 10.1186/s40635-021-00402-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 06/24/2021] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Reduced endothelial Tie2 expression occurs in diverse experimental models of critical illness, and experimental Tie2 suppression is sufficient to increase spontaneous vascular permeability. Looking for a common denominator among different critical illnesses that could drive the same Tie2 suppressive (thereby leak inducing) phenotype, we identified "circulatory shock" as a shared feature and postulated a flow-dependency of Tie2 gene expression in a GATA3 dependent manner. Here, we analyzed if this mechanism of flow-regulation of gene expression exists in vivo in the absence of inflammation. RESULTS To experimentally mimic a shock-like situation, we developed a murine model of clonidine-induced hypotension by targeting a reduced mean arterial pressure (MAP) of approximately 50% over 4 h. We found that hypotension-induced reduction of flow in the absence of confounding disease factors (i.e., inflammation, injury, among others) is sufficient to suppress GATA3 and Tie2 transcription. Conditional endothelial-specific GATA3 knockdown (B6-Gata3tm1-Jfz VE-Cadherin(PAC)-cerERT2) led to baseline Tie2 suppression inducing spontaneous vascular leak. On the contrary, the transient overexpression of GATA3 in the pulmonary endothelium (jet-PEI plasmid delivery platform) was sufficient to increase Tie2 at baseline and completely block its hypotension-induced acute drop. On the functional level, the Tie2 protection by GATA3 overexpression abrogated the development of pulmonary capillary leakage. CONCLUSIONS The data suggest that the GATA3-Tie2 signaling pathway might play a pivotal role in controlling vascular barrier function and that it is affected in diverse critical illnesses with shock as a consequence of a flow-regulated gene response. Targeting this novel mechanism might offer therapeutic opportunities to treat vascular leakage of diverse etiologies.
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Affiliation(s)
- Temitayo O Idowu
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | - Valerie Etzrodt
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | - Thorben Pape
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | - Joerg Heineke
- Department of Cardiovascular Physiology, European Center for Angioscience, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Heidelberg, Mannheim, Germany
| | - Klaus Stahl
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - Hermann Haller
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | - Sascha David
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany.
- Institute of Intensive Care Medicine, University Hospital Zurich, Rämistrasse 100, 8091, Zurich, Switzerland.
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13
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Role of endothelial microRNA 155 on capillary leakage in systemic inflammation. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2021; 25:76. [PMID: 33618730 PMCID: PMC7901081 DOI: 10.1186/s13054-021-03500-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 02/10/2021] [Indexed: 01/07/2023]
Abstract
Background Capillary leakage is a key contributor to the pathological host response to infections. The underlying mechanisms remain incompletely understood, and the role of microRNAs (MIR) has not been investigated in detail. We hypothesized that specific MIRs might be regulated directly in the endothelium thereby contributing to vascular leakage.
Methods SmallRNA sequencing of endotoxemic murine pulmonary endothelial cells (ECs) was done to detect regulated vascular MIRs. In vivo models: transgenic zebrafish (flk1:mCherry/l-fabp:eGFP-DPB), knockout/wildtype mouse (B6.Cg-Mir155tm1.1Rsky/J); disease models: LPS 17.5 mg/kgBW and cecal ligation and puncture (CLP); in vitro models: stimulated human umbilical vein EC (HUVECs), transendothelial electrical resistance. Results Endothelial MIR155 was identified as a promising candidate in endotoxemic murine pulmonary ECs (25 × upregulation). Experimental overexpression in a transgenic zebrafish line and in HUVECs was sufficient to induce spontaneous vascular leakage. To the contrary, genetic MIR155 reduction protects against permeability both in vitro and in endotoxemia in vivo in MIR155 heterozygote knockout mice thereby improving survival by 40%. A tight junction protein, Claudin-1, was down-regulated both in endotoxemia and by experimental MIR155 overexpression. Translationally, MIR155 was detectable at high levels in bronchoalveolar fluid of patients with ARDS compared to healthy human subjects. Conclusions We found that MIR155 is upregulated in the endothelium in mouse and men as part of a systemic inflammatory response and might contribute to the pathophysiology of vascular leakage in a Claudin-1-dependent manner. Future studies have to clarify whether MIR155 could be a potential therapeutic target. ![]()
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Abstract
Purpose of review There have been significant advancements in different aspects of management of severe acute pancreatitis (SAP). Our review of the most recent literature focuses on severity prediction, fluid resuscitation, analgesic administration, nutrition, and endoscopic intervention for SAP and its extra-pancreatic complications. Recent findings Recent studies on serum cytokines for the prediction of SAP have shown superior prognostic performance when compared with conventional laboratory tests and clinical scoring systems. In patients with established SAP and vascular leak syndrome, intravenous fluids should be administered with caution to prevent intra-abdominal hypertension and volume overload. Endoscopic retrograde cholangiopancreatography improves outcomes only in AP patients with suspected cholangitis. Early enteral tube-feeding does not appear to be superior to on-demand oral feeding. Abdominal compartment syndrome is a highly lethal complication of SAP that requires percutaneous drainage or decompressive laparotomy. Endoscopic transmural drainage followed by necrosectomy (i.e., “step-up approach”) is the treatment strategy of choice in patients with symptomatic or infected walled-off pancreatic necrosis. Summary SAP is a complex clinical syndrome associated with a high mortality rate. Early prediction of SAP remains challenging due to the limited accuracy of the available prediction tools. Early fluid resuscitation, organ support, enteral nutrition, and prevention of/or prompt recognition of abdominal compartment syndrome remain cornerstones of its management. A step-up, minimally invasive drainage/debridement is the preferred approach for patients with infected pancreatic necrosis.
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Affiliation(s)
- Peter J. Lee
- Division of Gastroenterology and Hepatology, Department of Medicine, Hospital of the University of Pennsylvania, Philadelphia, PA USA
| | - Georgios I. Papachristou
- Division of Gastroenterology and Hepatology, Department of Medicine, Ohio State University Wexner Medical Center, 410 W 10th Street, 2nd floor, Columbus, OH 43210 USA
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15
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Idowu TO, Etzrodt V, Seeliger B, Bolanos-Palmieri P, Thamm K, Haller H, David S. Identification of specific Tie2 cleavage sites and therapeutic modulation in experimental sepsis. eLife 2020; 9:e59520. [PMID: 32838837 PMCID: PMC7447424 DOI: 10.7554/elife.59520] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 08/11/2020] [Indexed: 12/19/2022] Open
Abstract
Endothelial Tie2 signaling plays a pivotal role in vascular barrier maintenance at baseline and after injury. We previously demonstrated that a sharp drop in Tie2 expression observed across various murine models of critical illnesses is associated with increased vascular permeability and mortality. Matrix metalloprotease (MMP)-14-mediated Tie2 ectodomain shedding has recently been recognized as a possible mechanism for Tie2 downregulation in sepsis. Here, we identified the exact MMP14-mediated Tie2 ectodomain cleavage sites and could show that pharmacological MMP14 blockade in experimental murine sepsis exerts barrier protective and anti-inflammatory effects predominantly through the attenuation of Tie2 cleavage to improve survival both in a pre-treatment and rescue approach. Overall, we show that protecting Tie2 shedding might offer a new therapeutic opportunity for the treatment of septic vascular leakage.
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Affiliation(s)
- Temitayo O Idowu
- Department of Nephrology and Hypertension, Hannover Medical SchoolHannoverGermany
| | - Valerie Etzrodt
- Department of Nephrology and Hypertension, Hannover Medical SchoolHannoverGermany
| | - Benjamin Seeliger
- Department of Respiratory Medicine and German Centre of Lung Research (DZL), Hannover Medical SchoolHannoverGermany
| | - Patricia Bolanos-Palmieri
- Department of Nephrology and Hypertension, Hannover Medical SchoolHannoverGermany
- Department of Nephrology and Hypertension, University Hospital of ErlangenErlangenGermany
| | - Kristina Thamm
- Department of Nephrology and Hypertension, Hannover Medical SchoolHannoverGermany
| | - Hermann Haller
- Department of Nephrology and Hypertension, Hannover Medical SchoolHannoverGermany
| | - Sascha David
- Department of Nephrology and Hypertension, Hannover Medical SchoolHannoverGermany
- Institute for Intensive Care, University Hospital ZurichZurichSwitzerland
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16
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Cavaillon J, Singer M, Skirecki T. Sepsis therapies: learning from 30 years of failure of translational research to propose new leads. EMBO Mol Med 2020; 12:e10128. [PMID: 32176432 PMCID: PMC7136965 DOI: 10.15252/emmm.201810128] [Citation(s) in RCA: 150] [Impact Index Per Article: 37.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 02/12/2020] [Accepted: 02/17/2020] [Indexed: 12/13/2022] Open
Abstract
Sepsis has been identified by the World Health Organization (WHO) as a global health priority. There has been a tremendous effort to decipher underlying mechanisms responsible for organ failure and death, and to develop new treatments. Despite saving thousands of animals over the last three decades in multiple preclinical studies, no new effective drug has emerged that has clearly improved patient outcomes. In the present review, we analyze the reasons for this failure, focusing on the inclusion of inappropriate patients and the use of irrelevant animal models. We advocate against repeating the same mistakes and propose changes to the research paradigm. We discuss the long-term consequences of surviving sepsis and, finally, list some putative approaches-both old and new-that could help save lives and improve survivorship.
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Affiliation(s)
| | - Mervyn Singer
- Bloomsbury Institute of Intensive Care MedicineUniversity College LondonLondonUK
| | - Tomasz Skirecki
- Laboratory of Flow Cytometry and Department of Anesthesiology and Intensive Care MedicineCentre of Postgraduate Medical EducationWarsawPoland
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17
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Abstract
Lethal features of sepsis and acute respiratory distress syndrome (ARDS) relate to the health of small blood vessels. For example, alveolar infiltration with proteinaceous fluid is often driven by breach of the microvascular barrier. Spontaneous thrombus formation within inflamed microvessels exacerbates organ ischemia, and in its final stages, erupts into overt disseminated intravascular coagulation. Disruption of an endothelial signaling axis, the Angiopoietin-Tie2 pathway, may mediate the abrupt transition from microvascular integrity to pathologic disruption. This review summarizes preclinical and clinical results that implicate the Tie2 pathway as a promising target to restore microvascular health in sepsis and ARDS.
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Affiliation(s)
- Kelsey D Sack
- Department of Medicine, Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, RN330C, Boston, MA 02215, USA
| | - John A Kellum
- Department of Critical Care Medicine, CRISMA Center, University of Pittsburgh, University of Pittsburgh, School of Medicine, 3347 Forbes Avenue, Suite 220, Room 202, Pittsburgh, PA 15213, USA
| | - Samir M Parikh
- Department of Medicine, Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, RN330C, Boston, MA 02215, USA.
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Chen LS, Singh SP, Müller G, Bornstein SR, Kanczkowski W. Transcriptional Analysis of Sepsis-Induced Activation and Damage of the Adrenal Endothelial Microvascular Cells. Front Endocrinol (Lausanne) 2019; 10:944. [PMID: 32038494 PMCID: PMC6987315 DOI: 10.3389/fendo.2019.00944] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 12/31/2019] [Indexed: 11/23/2022] Open
Abstract
Bacterial sepsis is a serious threat to the body homeostasis and is often associated with high mortality in non-coronary intensive stations. In order to survive sepsis, rapid activation of the hypothalamus-pituitary-adrenal gland axis and sympathomedullary system is necessary. In many patients with sepsis, the function of those two arms of the stress system is dysregulated with underlying mechanisms remaining unknown. In our previous experimental studies, we have demonstrated that LPS-induced systemic inflammation and CLP-induced peritonitis can result in adrenal gland damage. Histological and transcriptomic analysis revealed a potential involvement of the adrenal microvascular endothelium in this process. However, our knowledge about the function of adrenal microvascular cells during sepsis is scarce. In the present study, we have characterized transcriptomic alterations in isolated mouse adrenal microvascular endothelial cells induced by systemic administration of bacterial LPS. Our results revealed that LPS induced a distinct transcriptomic profile in the adrenal microvascular cells, including multiple genes regulating inflammation, activation of the coagulation cascade and vascular permeability. Activation of those genes may be potentially involved in the damage to the microvascular endothelium and altogether contribute to the sepsis-mediated adrenal dysregulation.
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Affiliation(s)
- Lan-Sun Chen
- Institute of Medical Microbiology and Hygiene, Technische Universität Dresden, Dresden, Germany
- Department of Internal Medicine III, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
| | | | - Gregor Müller
- Department of Internal Medicine III, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
| | - Stefan R. Bornstein
- Department of Internal Medicine III, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
| | - Waldemar Kanczkowski
- Department of Internal Medicine III, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
- *Correspondence: Waldemar Kanczkowski
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