VCAM1 and acute respiratory distress syndrome: The formation of inflammatory molecules, such as reactive oxygen (ROS) and nitrogen (RNS) species, adhesion molecules such as vascular cell adhesion molecule-1 (VCAM-1), intercellular adhesion molecule-1 (ICAM-1) and transcription factors such as nuclear factor kappa B (NF-κB) and activator protein 1 (AP-1), is crucial in ARDS pathogenesis [13].