Initial receptor-ligand interactions modulate gene expression and phagosomal properties during both early and late stages of phagocytosis - Inria - Institut national de recherche en sciences et technologies du numérique Accéder directement au contenu
Article Dans Une Revue European Journal of Cell Biology Année : 2010

Initial receptor-ligand interactions modulate gene expression and phagosomal properties during both early and late stages of phagocytosis

Eik Hoffmann
  • Fonction : Auteur
Sabrina Marion
  • Fonction : Auteur
Bibhuti Bhusan Mishra
  • Fonction : Auteur
Ramona Kratzke
  • Fonction : Auteur
Syed Furquan Ahmad
  • Fonction : Auteur
Daniela Holzer
  • Fonction : Auteur
Paras Kumar Anand
  • Fonction : Auteur
Dieter Weiss
  • Fonction : Auteur
Gareth Griffiths
  • Fonction : Auteur
Sergei Kuznetsov
  • Fonction : Auteur

Résumé

The receptors engaged during recognition and phagocytic uptake of microorganisms and particles influence signaling events and diverse subcellular responses that occur during phagosome formation and maturation. However, pathogens generally have multiple ligands on their surface, making it difficult to dissect the roles of individual receptors during phagocytosis. Moreover,it remains elusive to which extent receptor-ligand interactions and early binding events define the subsequent intracellular fate of phagosomes. Here,we used latex beads coupled to single ligands, focusing on immunoglobulin G, man- nan, bacterial lipopolysaccharides and avidin, and monitored: (1) phagocytic uptake rates, (2) fusion of phagosomes with lysosomal compartments,(3) the gene expression profile during phagocytosis, (4) the protein composition of mature phagosomes, and (5) time-dependent dynamics of protein association with phagosomes in J774.A1 mouse macrophages. The differently coated latex beads were internalized at different rates and exhibited different kinetics of phagolysosomal fusion events dependent on their specific ligand. Furthermore, less than 60% of identified phagosomal proteins and only 10 -1 5% of changes in gene expression were common to all investigated ligands. These findings demonstrate that each single ligand induced a distinct pattern of genes and a different protein composition of phagosomes.Taken together, our data argue that phagocytic receptor-specific programs of signaling events direct phagosomes to different physiological states and support the existence of a specific receptor-ligand 'signature' during the whole process of phagocytosis.

Dates et versions

hal-00751534 , version 1 (13-11-2012)

Identifiants

Citer

Eik Hoffmann, Sabrina Marion, Bibhuti Bhusan Mishra, Mathias John, Ramona Kratzke, et al.. Initial receptor-ligand interactions modulate gene expression and phagosomal properties during both early and late stages of phagocytosis. European Journal of Cell Biology, 2010, 89 (9), pp.693-704. ⟨10.1016/j.ejcb.2010.04.006⟩. ⟨hal-00751534⟩
494 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More