TGFB1 and obstructive sleep apnea syndrome: An analysis of the phenotype and immune response activity of 29 healthy volunteers and 32 patients with continuous positive airway pressure (CPAP)-treated OSA revealed that glycoprotein-A repetitions predominant protein monocytes from untreated patients with OSA inhibit NK cells through the release of TGF-β; however, reoxygenation eventually restores their altered phenotype and cytotoxicity (57).