Corticosteroids inhibit Mycobacterium tuberculosis-induced necrotic host cell death by abrogating mitochondrial membrane permeability transition.
Adrenal Cortex Hormones
/ pharmacology
Dexamethasone
/ pharmacology
Humans
Mitochondrial Membranes
/ drug effects
Mycobacterium tuberculosis
/ drug effects
Phosphorylation
/ drug effects
Receptors, Tumor Necrosis Factor, Type I
/ genetics
Signal Transduction
/ genetics
p38 Mitogen-Activated Protein Kinases
/ metabolism
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
08 02 2019
08 02 2019
Historique:
received:
07
05
2018
accepted:
09
01
2019
entrez:
10
2
2019
pubmed:
10
2
2019
medline:
9
4
2019
Statut:
epublish
Résumé
Corticosteroids are host-directed drugs with proven beneficial effect on survival of tuberculosis (TB) patients, but their precise mechanisms of action in this disease remain largely unknown. Here we show that corticosteroids such as dexamethasone inhibit necrotic cell death of cells infected with Mycobacterium tuberculosis (Mtb) by facilitating mitogen-activated protein kinase phosphatase 1 (MKP-1)-dependent dephosphorylation of p38 MAPK. Characterization of infected mixed lineage kinase domain-like (MLKL) and tumor necrosis factor receptor 1 (TNFR1) knockout cells show that the underlying mechanism is independent from TNFα-signaling and necroptosis. Our results link corticosteroid function and p38 MAPK inhibition to abrogation of necrotic cell death mediated by mitochondrial membrane permeability transition, and open new avenues for research on novel host-directed therapies (HDT).
Identifiants
pubmed: 30737374
doi: 10.1038/s41467-019-08405-9
pii: 10.1038/s41467-019-08405-9
pmc: PMC6368550
doi:
Substances chimiques
Adrenal Cortex Hormones
0
Receptors, Tumor Necrosis Factor, Type I
0
Dexamethasone
7S5I7G3JQL
p38 Mitogen-Activated Protein Kinases
EC 2.7.11.24
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
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