Dopamine(DA) is a common neurotransmitter that has been known to regulate behavior, movement, cardiovascular，endocrine and gastrointestinal functions, but also functions as an important molecule engaging in the immune systems to possess anti-inflammatory effects. However, its role in ventilator-induced lung injury (VILI) is still unclear. Herein, this study aimed to investigate the therapeutic efficacy of dopamine on ventilation-induced lung endothelial barrier dysfunction and explore the possible underlying molecular mechanisms.