Neutrophil Degranulation of Azurophil and Specific Granules.
Methods Mol Biol
; 2087: 215-222, 2020.
Article
en En
| MEDLINE
| ID: mdl-31728994
ABSTRACT
Neutrophils play a pivotal role in innate immunity and in the inflammatory reactions. Upon activation, neutrophils release several toxic molecules directed against microbial pathogens into the phagosome. These molecules include reactive oxygen species (ROS), myeloperoxidase, glucosidases, proteases, and antibacterial peptides. In resting cells these proteins and the enzyme responsible for ROS production (NOX2) are stored inside or at the membranes of different granules called azurophil or primary, specific or secondary, gelatinase or tertiary, and the secretory vesicles. Each granule has a specific density, content, and markers. Myeloperoxidase (MPO) is the azurophil granule marker, and the neutrophil-gelatinase-associated lipocalin (NGAL) is the specific granule marker. After cell activation by different stimuli, granule contents are released into the phagosome or in the extracellular space through a process called degranulation. Also during this process, membrane granules fuse with the phagosome and plasma membrane allowing expression of new markers at the cell surface. The degranulation can be assessed by measuring either the release of different proteins by neutrophils or the expression of granule markers at the plasma membrane. In this chapter, we describe the techniques used to measure degranulation of azurophil and specific neutrophil granules using different approaches such as measurement of MPO enzymatic activity and detection of MPO and NGAL proteins by SDS-PAGE and Western blot.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Asunto principal:
Degranulación de la Célula
/
Activación Neutrófila
/
Gránulos Citoplasmáticos
/
Neutrófilos
Límite:
Humans
Idioma:
En
Revista:
Methods Mol Biol
Asunto de la revista:
BIOLOGIA MOLECULAR
Año:
2020
Tipo del documento:
Article
País de afiliación:
Francia