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Published on: March 16, 2018
Distribution of protein kinase C isoforms after infection of macrophages with Leishmania major
S Pingel1, Z E Wang, R M Locksley
1Department of Medicine, University of California San Francisco, 94143-0654, USA.
Abstract:
We characterized the effects of Leishmania infection on activation-induced translocation of protein kinase C (PKC) isoforms in murine bone marrow-derived macrophages. Although PKC-dependent gene expression was attenuated by infection, the distribution and translocation of PKC isoforms were unaffected. However, subsequent dissociation from membranes was substantially delayed for some isoforms, particularly PKCbeta.
Insights
Leishmania infection impacts protein kinase C (PKC) dynamics in macrophages. While initial PKC translocation is unaffected, some isoforms show delayed membrane dissociation, influencing cellular responses.
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- Leishmania infection is a significant global health concern.
- Protein Kinase C (PKC) signaling is crucial for macrophage activation and immune responses.
- Understanding host-pathogen interactions at the molecular level is vital for developing therapeutic strategies.
Purpose of the Study:
- To investigate the impact of Leishmania infection on the activation-induced translocation of Protein Kinase C (PKC) isoforms in macrophages.
- To determine how Leishmania infection affects PKC isoform distribution, membrane association, and dissociation dynamics.
Main Methods:
- Murine bone marrow-derived macrophages were infected with Leishmania.
- Activation-induced translocation of PKC isoforms was characterized using cellular and molecular techniques.
- PKC isoform distribution, membrane association, and dissociation kinetics were analyzed.
Main Results:
- Leishmania infection attenuated PKC-dependent gene expression in macrophages.
- The initial distribution and translocation of PKC isoforms to cellular membranes upon activation were not significantly affected by infection.
- A notable delay in the subsequent dissociation of specific PKC isoforms, particularly PKCbeta, from macrophage membranes was observed.
Conclusions:
- Leishmania infection alters the temporal dynamics of PKC signaling in macrophages, specifically delaying the clearance of certain PKC isoforms from membranes.
- These alterations in PKC isoform membrane dynamics may contribute to the modulation of macrophage function during Leishmania infection.
- Further research is warranted to elucidate the precise mechanisms and functional consequences of delayed PKC isoform dissociation.
