The leukotriene production by bovine polymorphonuclear leukocytes isolated from peripheral blood has been studied. Cells were incubated in the presence of arachidonic acid, glutathione, calcium ionophore A23187 and Ca2+. The leukotrienes then formed are leukotriene C4, leukotriene B4, two all-trans isomers of leukotriene B4 and the double dioxygenation product 12-epi-6-trans-8-cis-leukotriene B4. Leukotriene C4 is formed in such a large quantity by the bovine polymorphonuclear leukocyte that it might constitute an excellent and inexpensive source for the biosynthetic preparation of this spasmogenic leukotriene.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1016/0005-2760(84)90179-6 | DOI Listing |
Front Vet Sci
January 2025
Graduate School of Integrated Sciences for Life, Hiroshima University, Higashihiroshima, Hiroshima, Japan.
Early detection of bovine mastitis-causing pathogens is necessary for treatment. As culturing methods are time-consuming, a more rapid detection technique is required. This study investigated the sensitivity, specificity, and detection limit of Gram staining of milk precipitates (milk Gram stain, MGS) to detect bovine mastitis-causing pathogens in milk, as well as the potential of MGS to diagnose inflammation by counting polymorphonuclear leukocytes (PMN).
View Article and Find Full Text PDFRes Vet Sci
January 2025
Department of Veterinary Medicine and Animal Sciences (DIVAS), University of Milan, Via dell'Università 6, 2600 Lodi, Italy.
Enniatins (ENNs) affect human and animal health. Different ENN analogs have been identified, but Enniatin B (ENN B) is the most detected in foods and feeds. This study investigated the effect of ENN B on bovine polymorphonuclear leukocytes (PMNs) challenged with increasing ENN B concentrations (0.
View Article and Find Full Text PDFVet Immunol Immunopathol
January 2025
Laboratory of Preventive Veterinary Medicine and Animal Health, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa-shi, Kanagawa-ken 252-0880, Japan. Electronic address:
Cetaceans have adapted to aquatic life by evolving various anatomic and physiologic traits, but biological defense mechanisms specific to aquatic mammals that protect against pathogenic microorganisms in the aquatic environment have not been elucidated. In this study, we investigated the migration of polymorphonuclear leukocytes in bottlenose dolphins in response to various chemotactic factors and compared the migration response with that of terrestrial animals such as cows and humans to characterize biological defense mechanisms unique to cetaceans. Bottlenose dolphin neutrophils showed strong chemotactic activity toward zymosan-activated serum and recombinant human interleukin-8 but no chemotaxis toward N-formyl-methionyl-leucyl-phenylalanine or leukotriene B at any concentration examined.
View Article and Find Full Text PDFFront Immunol
January 2025
Institute of Parasitology, Justus Liebig University Giessen, Giessen, Germany.
Bovine besnoitiosis is a re-emerging cattle disease caused by the apicomplexan parasite , which severely affects individual animal welfare and profitability in cattle industry. We recently showed that tachyzoite exposure to bovine polymorphonuclear neutrophils (PMN) effectively triggers neutrophil extracellular trap (NET) formation, leading to parasite immobilization hampering host cell infection. So far, the triggers of this defense mechanism remain unclear.
View Article and Find Full Text PDFFront Vet Sci
December 2024
Laboratory of Inflammation Pharmacology and Immunometabolism, Institute of Pharmacology and Morphophysiology, Faculty of Veterinary Sciences, Universidad Austral de Chile, Valdivia, Chile.
D-lactic acidosis is associated with fermentative disturbances and is often marked by elevated levels of D-lactic acid in the blood, ruminal fluid, and synovial fluid in cattle. D-lactic acidosis is linked to various inflammatory manifestations, and although the causative factors have been extensively explored, the exact pathogenesis of the associated inflammation remains elusive. Notably, less attention has been given to D-lactate, a stereoisomer found in the plasma of affected animals, which may lead to D-lactic acidosis.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!