Mechanism of isorhynchophylline in lipopolysaccharide-induced acute lung injury based on proteomic technology

Abstract Isorhynchophylline, a tetracyclic indole alkaloid, has anti-inflammatory and antioxidant activities against cardiovascular diseases and central nervous system disorders. Acute lung injury (ALI) is a manifestation of inflammation concentrated in the lungs and has a high incidence rate and mortality. Here, we established a mouse model of ALI and observed the effects of isorhynchophylline. Proteomic results showed that 5727 proteins were detected in mouse lung tissues, and 16 proteins were screened out. Isorhynchophylline could reverse the trend of these differential proteins. In addition, isorhynchophylline can act on integrin alpha M to reduce neutrophil recruitment and thereby produce anti-inflammatory effects and may suppress neutrophil migration through the leukocyte transendothelial migration pathway. TUNEL and RT-PCR experiments revealed that LPS-induced ALI in mice increases the apoptosis of lung tissues, damage to alveolar epithelial cells and levels of inflammatory factors. Treatment with isorhynchophylline can repair tissues, improve lung tissue pathology and reduce lung inflammation.