Extracellular vesicle concentration and procoagulant activity of canine haemoperitoneum fluid and packed red blood cells.

Autor: Sowy S; Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA., Rutter CR; Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA., Jeffery U; Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA.
Jazyk: angličtina
Zdroj: The Journal of small animal practice [J Small Anim Pract] 2019 Jul; Vol. 60 (7), pp. 423-429. Date of Electronic Publication: 2019 Apr 26.
DOI: 10.1111/jsap.13002
Abstrakt: Objectives: To compare the concentration of phosphatidylserine-positive extracellular vesicles and phosphatidylserine-derived procoagulant activity of canine haemoperitoneum fluids and packed red blood cell units.
Materials and Methods: Ten dogs with haemoperitoneum (neoplasia = 7; trauma = 1; other = 2) were recruited, and five non-leukoreduced packed red blood cell units purchased. Supernatants were collected from haemoperitoneum samples and packed red blood cell units using a consistent centrifugation protocol. Phosphatidylserine-positive extracellular vesicle concentrations were measured by flow cytometry and phosphatidylserine-mediated procoagulant activity by a commercial thrombin generation assay.
Results: Phosphatidylserine-mediated procoagulant activity was significantly higher for supernatants collected from packed red blood cell units (median 54 nM, range 53 to 60 nM) than haemoperitoneum samples (median 43 nM; range 7 to 51 nM; P = 0.0007). By flow cytometry, the concentration of phosphatidylserine-positive extracellular vesicles was not significantly different between packed red blood cell (median: 415/μL, range 173 to 1331/μL) and haemoperitoneum samples (median: 314/μL, range 132 to 3880/μL; P = 0.77).
Clinical Significance: This study does not suggest that shed abdominal blood contains more extracellular vesicles with phosphatidylserine-mediated procoagulant activity than donor packed red blood cell units. Clinical studies to compare the effects of autologous transfusion of shed abdominal blood and packed red blood cell units on coagulation status and clinical outcome are required.
(© 2019 British Small Animal Veterinary Association.)
Databáze: MEDLINE
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