Time-related changes in equine neutrophils after experimental endotoxemia: myeloperoxidase staining, size, and numbers
Autor: | Katarina Nostell, J. Bröjer, Anna Edner, Harold Tvedten, Inger Lilliehöök |
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Rok vydání: | 2016 |
Předmět: |
0301 basic medicine
medicine.medical_specialty Neutropenia 040301 veterinary sciences Neutrophils Inflammation Giant Neutrophils 0403 veterinary science 03 medical and health sciences Internal medicine medicine Animals Horses Peroxidase Hematology General Veterinary biology business.industry Horse 04 agricultural and veterinary sciences Neutrophilia Endotoxemia Staining Endotoxins 030104 developmental biology Myeloperoxidase Immunology Absolute neutrophil count biology.protein Horse Diseases medicine.symptom business |
Zdroj: | Veterinary clinical pathology. 45(1) |
ISSN: | 1939-165X |
Popis: | Background Neutrophil myeloperoxidase content is determined by the Advia 2120 hematology system by staining characteristics. Changes in myeloperoxidase staining are shown by location of neutrophils on Advia peroxidase dot plots and as myeloperoxidase index (MPXI). Significant changes in MPXI have been reported during severe inflammation in horses, dogs, and people but conclusions were inconsistent. Objectives Infusion of endotoxin was used to initiate an inflammatory stimulus under controlled conditions and over a longer time period than in previous studies to document kinetics of changes in neutrophil numbers, morphology, and myeloperoxidase staining. Identification of consistent time-related changes may allow better interpretation of changes in neutrophil characteristics during inflammation. Materials Five Standardbred trotting horses received an intravenous infusion over a 6-hour period with Escherichia coli endotoxin. Neutrophil count, MPXI, neutrophil characteristics in Advia 2120 Perox dot plots and neutrophil morphology in blood smears were monitored with repeated sampling for up to 10 days. Results Endotoxin infusion immediately caused severe neutropenia which converted to neutrophilia 14 hours after start of endotoxin infusion. Neutrophilia was still present 78 hours after start of infusion. Large “giant” neutrophils first appeared in blood smears and Advia Perox dot plots after 36–48 hours. A marked and consistent decrease in MPXI was seen in all horses 6 days (150 hours) after endotoxin exposure. Conclusions Endotoxemia caused prominent, time-related changes in equine neutrophil characteristics including emergence of giant neutrophils and markedly decreased MPXI several days after endotoxin infusion. |
Databáze: | OpenAIRE |
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