Changes in the light transmission of suspensions of activated neutrophils are widely used to measure the dynamics of neutrophil aggregation. Such studies have suggested, for example, that aggregation is irreversible for human newborn neutrophils but fully reversible for adult cells. We have evaluated aggregation directly by microscopic particle counting and compared it with changes in light tra...

Neutrophils form the first line of host defense against bacterial pathogens. They are rapidly mobilized to sites of infection where they help marshal host defenses and remove bacteria by phagocytosis. While splenic neutrophils promote marginal zone B cell antibody production in response to administered T cell independent antigens, whether neutrophils shape humoral immunity in other lymphoid org...

Neutrophils play an important role in the defence of the bovine mammary gland against bacterial infections. In the course of the resolution of mammary gland inflammation, neutrophils undergo programmed cell death – apoptosis. The aim of this study was to confirm whether the co-cultivation of neutrophils of the bovine mammary gland with either Staphylococcus aureus or Streptococcus uberis leads ...

Antineutrophil cytoplasm autoantibody (ANCA)-associated small vessel vasculitides are systemic diseases characterized by chronic inflammation of blood vessels. These vasculitides are associated with the presence of ANCA which are, in most cases, directed towards proteinase 3 (PR3) or myeloperoxidase (MPO). In vitro and in vivo data have suggested a pathophysiological role in the ANCA-associated...

Protective responses against pathogens require a rapid mobilization of resting neutrophils and the timely removal of activated ones. Neutrophils are exceptionally short-lived leukocytes, yet it remains unclear whether the lifespan of pathogen-engaged neutrophils is regulated differently from that in the circulating steady-state pool. Here, we have found that under homeostatic conditions, the mR...

Blagitz M.G., Souza F.N., Batista C.F., Santos B.P., Parra A.C., Azevedo L.F.F. & Della Libera A.M.M.P. 2015. Expression of CD14 and toll-like receptors 2 and 4 by milk neutrophils in bovine mammary glands infected with Corynebacterium bovis. Pesquisa Veterinária Brasileira 35(1):1-5. Departamento de Clínica Médica, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Av. P...