PMID- 31346884 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200930 IS - 2197-425X (Print) IS - 2197-425X (Electronic) IS - 2197-425X (Linking) VI - 7 IP - Suppl 1 DP - 2019 Jul 25 TI - Antithrombin plus alpha-1 protease inhibitor does not affect coagulation and inflammation in two murine models of acute lung injury. PG - 36 LID - 10.1186/s40635-019-0240-7 [doi] LID - 36 AB - BACKGROUND: In acute respiratory distress syndrome (ARDS), uncontrolled production of activators of coagulation and proinflammatory mediators results in a shift from an adequate local innate immune response to hypercoagulability and inflammation. This study aimed to investigate whether the protease inhibitors antithrombin (AT) and alpha-1 protease inhibitor (A1PI) may attenuate an exaggerated pulmonary immune response. METHODS: Lung injury was induced either by single intranasal administration of lipopolysaccharide (LPS) (5 mg/kg) in BALB/c mice or by combination of an intravenous injection of LPS (10 mg/kg) with subsequent injurious ventilation using high tidal volumes (12-15 ml/kg) for 4 h in RccHan Wistar rats. Animals received either a single bolus of AT (250 IU/kg) or A1PI (60 mg/kg) alone or in combination, with or without intravenous low-dose heparin (100 U/kg). Control animals received saline. Additional controls received neither LPS, nor ventilation, nor treatment. Endpoints were local and systemic markers of coagulation, e.g., thrombin-antithrombin complexes (TATc), and inflammation, e.g., interleukin-6. RESULTS: Both lung injury models resulted in a pronounced immune response within the pulmonary compartment shown by elevated levels of markers of coagulation and inflammation. The two-hit lung injury model also induced profound systemic coagulopathy and inflammation. Monotherapy with AT or A1PI did not reduce pulmonary coagulopathy or inflammation in any lung injury model. Nor did combination therapy with AT and A1PI result in a decrease of coagulation or inflammatory parameters. AT markedly reduced systemic levels of TATc in the two-hit lung injury model. Systemic inflammation was not affected by the different interventions. Additional administration of heparin did not lead to macroscopic bleeding incidences. CONCLUSIONS: In two different murine models of acute lung injury, neither single therapy with AT or A1PI nor combination of both agents attenuates the pronounced pulmonary coagulation or inflammatory response. FAU - Juschten, Jenny AU - Juschten J AUID- ORCID: 0000-0003-2176-5072 AD - Department of Intensive Care, Amsterdam UMC, VU Medical Center, Amsterdam, Netherlands. j.juschten@vumc.nl. AD - Research VUmc Intensive Care (REVIVE), Amsterdam UMC, VU Medical Center, Amsterdam, Netherlands. j.juschten@vumc.nl. AD - Department of Intensive Care, Amsterdam UMC, Academic Medical Center, Amsterdam, Netherlands. j.juschten@vumc.nl. AD - Laboratory of Experimental Intensive Care and Anesthesiology (L.E.I.C.A), Amsterdam UMC, Academic Medical Center, Amsterdam, Netherlands. j.juschten@vumc.nl. FAU - Ingelse, Sarah Anne AU - Ingelse SA AD - Laboratory of Experimental Intensive Care and Anesthesiology (L.E.I.C.A), Amsterdam UMC, Academic Medical Center, Amsterdam, Netherlands. AD - Emma Children's Hospital-Pediatric Intensive Care Unit, Amsterdam UMC, Academic Medical Center, Amsterdam, Netherlands. FAU - Maas, Martinus Adrianus Wilhelmus AU - Maas MAW AD - Laboratory of Experimental Intensive Care and Anesthesiology (L.E.I.C.A), Amsterdam UMC, Academic Medical Center, Amsterdam, Netherlands. FAU - Girbes, Armand Roelof Johan AU - Girbes ARJ AD - Department of Intensive Care, Amsterdam UMC, VU Medical Center, Amsterdam, Netherlands. AD - Research VUmc Intensive Care (REVIVE), Amsterdam UMC, VU Medical Center, Amsterdam, Netherlands. FAU - Juffermans, Nicole Petra AU - Juffermans NP AD - Department of Intensive Care, Amsterdam UMC, Academic Medical Center, Amsterdam, Netherlands. AD - Laboratory of Experimental Intensive Care and Anesthesiology (L.E.I.C.A), Amsterdam UMC, Academic Medical Center, Amsterdam, Netherlands. FAU - Schultz, Marcus Josephus AU - Schultz MJ AD - Department of Intensive Care, Amsterdam UMC, Academic Medical Center, Amsterdam, Netherlands. AD - Mahidol Oxford Tropical Medicine Research Unit (MORU), Mahidol University, Bangkok, Thailand. FAU - Tuinman, Pieter Roel AU - Tuinman PR AD - Department of Intensive Care, Amsterdam UMC, VU Medical Center, Amsterdam, Netherlands. AD - Research VUmc Intensive Care (REVIVE), Amsterdam UMC, VU Medical Center, Amsterdam, Netherlands. LA - eng GR - -/Grifols/ PT - Journal Article DEP - 20190725 PL - Germany TA - Intensive Care Med Exp JT - Intensive care medicine experimental JID - 101645149 PMC - PMC6658634 OTO - NOTNLM OT - ARDS OT - Acute lung injury OT - Alpha-1 protease inhibitor OT - Antithrombin OT - Coagulation OT - Inflammation OT - Lung injury model COIS- This study has been supported by an investigator-led research grant from Grifols. This funding facilitated conductance of this study, but did not influence the study design, collection of the data, analysis, nor interpretation or writing of the article. We declare that the tested treatment agents AT and A1PI were a kind gift from Grifols. EDAT- 2019/07/28 06:00 MHDA- 2019/07/28 06:01 PMCR- 2019/07/25 CRDT- 2019/07/27 06:00 PHST- 2019/02/22 00:00 [received] PHST- 2019/03/07 00:00 [accepted] PHST- 2019/07/27 06:00 [entrez] PHST- 2019/07/28 06:00 [pubmed] PHST- 2019/07/28 06:01 [medline] PHST- 2019/07/25 00:00 [pmc-release] AID - 10.1186/s40635-019-0240-7 [pii] AID - 240 [pii] AID - 10.1186/s40635-019-0240-7 [doi] PST - epublish SO - Intensive Care Med Exp. 2019 Jul 25;7(Suppl 1):36. doi: 10.1186/s40635-019-0240-7.