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2018 ; 2018
(ä): 7373921
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English Wikipedia
Obstructive Sleep Apnea Monocytes Exhibit High Levels of Vascular Endothelial
Growth Factor Secretion, Augmenting Tumor Progression
#MMPMID29997451
Cubillos-Zapata C
; Hernández-Jiménez E
; Avendaño-Ortiz J
; Toledano V
; Varela-Serrano A
; Fernández-Navarro I
; Casitas R
; Carpio C
; Aguirre LA
; García-Río F
; López-Collazo E
Mediators Inflamm
2018[]; 2018
(ä): 7373921
PMID29997451
show ga
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 HIF1? expression under IH. Moreover, these cells under IH polarize
toward a tumor-promoting phenotype in a HIF1?-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
HIF1? 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.