Obstructive Sleep Apnea Monocytes Exhibit High Levels of Vascular Endothelial Growth Factor Secretion, Augmenting Tumor Progression.
Mediators Inflamm
; 2018: 7373921, 2018.
Article
in En
| MEDLINE
| ID: mdl-29997451
ABSTRACT
Obstructive sleep apnea (OSA) is a syndrome characterized by repeated pauses in breathing induced by a partial or complete collapse of the upper airways during sleep. Intermittent hypoxia (IH), a hallmark characteristic of OSA, has been proposed to be a major determinant of cancer development, and patients with OSA are at a higher risk of tumors. Both OSA and healthy monocytes have been found to show enhanced HIF1α expression under IH. Moreover, these cells under IH polarize toward a tumor-promoting phenotype in a HIF1α-dependent manner and influence tumor growth via vascular endothelial growth factor (VEGF). Monocytes from patients with OSA increased the tumor-induced microenvironment and exhibited an impaired cytotoxicity in a 3D tumor in vitro model as a result of the increased HIF1α secretion. Adequate oxygen restoration both in vivo (under continuous positive airway pressure treatment, CPAP) and in vitro leads the monocytes to revert the tumor-promoting phenotype, demonstrating the plasticity of the innate immune system and the oxygen recovery relevance in this context.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Leukocytes, Mononuclear
/
Sleep Apnea, Obstructive
/
Vascular Endothelial Growth Factor A
Type of study:
Observational_studies
/
Prognostic_studies
Limits:
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Language:
En
Journal:
Mediators Inflamm
Journal subject:
BIOQUIMICA
/
PATOLOGIA
Year:
2018
Type:
Article
Affiliation country:
Spain