Hypoxia-induced neutrophil survival is mediated by HIF-1alpha-dependent NF-kappaB activity.
J Exp Med
; 201(1): 105-15, 2005 Jan 03.
Article
en En
| MEDLINE
| ID: mdl-15630139
ABSTRACT
Neutrophils are key effector cells of the innate immune response and are required to migrate and function within adverse microenvironmental conditions. These inflammatory sites are characterized by low levels of oxygen and glucose and high levels of reductive metabolites. A major regulator of neutrophil functional longevity is the ability of these cells to undergo apoptosis. We examined the mechanism by which hypoxia causes an inhibition of neutrophil apoptosis in human and murine neutrophils. We show that neutrophils possess the hypoxia-inducible factor (HIF)-1alpha and factor inhibiting HIF (FIH) hydroxylase oxygen-sensing pathway and using HIF-1alpha-deficient myeloid cells demonstrate that HIF-1alpha is directly involved in regulating neutrophil survival in hypoxia. Gene array, TaqMan PCR, Western blotting, and oligonucleotide binding assays identify NF-kappaB as a novel hypoxia-regulated and HIF-dependent target, with inhibition of NF-kappaB by gliotoxin or parthenolide resulting in the abrogation of hypoxic survival. In addition, we identify macrophage inflammatory protein-1beta as a novel hypoxia-induced neutrophil survival factor.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Contexto en salud:
6_ODS3_enfermedades_notrasmisibles
Problema de salud:
6_other_blood_disorders
Asunto principal:
Factores de Transcripción
/
Proteínas Nucleares
/
Supervivencia Celular
/
Apoptosis
/
Proteínas de Unión al ADN
/
Hipoxia
/
Neutrófilos
Tipo de estudio:
Prognostic_studies
Límite:
Animals
/
Humans
Idioma:
En
Revista:
J Exp Med
Año:
2005
Tipo del documento:
Article
País de afiliación:
Reino Unido