Related Experiment Video
Updated: Jul 23, 2025

Myeloid Innate Signaling Pathway Regulation by MALT1 Paracaspase Activity
Published on: January 7, 2019
p38γ and p38δ modulate innate immune response by regulating MEF2D activation.
Alejandra Escós1, Ester Diaz-Mora1, Michael Pattison2
1Department of Immunology and Oncology, Centro Nacional de Biotecnología/CSIC (CNB-CSIC), Campus-UAM, Madrid, Spain.
p38γ/p38δ kinases regulate innate immunity. New kinase-inactive p38γ/p38δ mice reveal their role in inflammatory responses and MEF2D phosphorylation, crucial for immune gene expression.
Area of Science:
- Immunology
- Molecular Biology
- Cell Signaling
Background:
- p38γ and p38δ (p38γ/p38δ) kinase roles in inflammation are unclear due to TPL2 level alterations in deficient mice.
- TPL2 is critical for myeloid cell inflammation regulation.
Purpose of the Study:
- To elucidate specific p38γ/p38δ functions in innate immunity.
- To investigate the role of p38γ/p38δ in regulating inflammatory responses and gene expression.
Main Methods:
- Generation of kinase-inactive p38γ/p38δ (p38γ/δKIKO) mice with normal TPL2 levels.
- Assessment of inflammatory responses to lipopolysaccharide (LPS) and *Candida albicans* infection.
- Gene expression, phospho-proteomic, and in vitro kinase assays.
Main Results:
- p38γ/δKIKO mice exhibited reduced inflammatory responses and septic shock susceptibility.
- p38γ/p38δ kinases regulate numerous innate immune response genes.
- p38γ/p38δ phosphorylate MEF2D at Ser444, impacting its transcriptional activity and downstream gene expression (Nos2, Il1b).
Conclusions:
- p38γ/p38δ kinases are key regulators of innate immune responses.
- MEF2D phosphorylation by p38γ/p38δ is a critical mechanism controlling immune gene expression.
More Related Videos
11:48Isolation Protocol of Mouse Monocyte-derived Dendritic Cells and Their Subsequent In Vitro Activation with Tumor Immune Complexes
Published on: May 31, 2018
07:55A Macrophage Reporter Cell Assay to Examine Toll-Like Receptor-Mediated NF-kB/AP-1 Signaling on Adsorbed Protein Layers on Polymeric Surfaces
Published on: January 7, 2020
Related Concept Videos
Master Transcription Regulators
NF-κB-dependent Signaling Pathway
NF-κB-dependent Signaling Mechanism
The...
MAPK Signaling Cascades
TGF - β Signaling Pathway
Receptor Downregulation in MVBs
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
Co-activators and Co-repressors