Inhibition of the CD40/CD40L complex protects mice against ALI-induced pancreas degradation.

BACKGROUND

Acute lung injury (ALI) is a severe complication of transfusion. In a previous study, we saw that inhibition of the CD40/CD40L complex allowed restoration of ALI lesions in an experimental mouse model.

OBJECTIVES

This study focused on pancreas-associated injury development during experimental ALI pathogenesis and its limitation through CD40/CD40L complex inhibition.

MATERIALS AND METHODS

An ALI mouse model was established through intraperitoneal lipopolysaccharide and intravenous anti-major histocompatibility complex class I monoclonal antibody injection. Preemption of lesions was achieved with intravenous injection of neutralizing anti-CD40L monoclonal antibody 30 minutes before the trigger, that is, anti-major histocompatibility complex class I monoclonal antibody administration. Histology and immunoassay analyses were used to evaluate pancreatic lesions.

RESULTS

ALI development induced significant degradation of the lungs and pancreas and was associated with pancreatic lesions. Different scores were established showing more severe injury to the pancreas in ALI conditions; however, injury was significantly reduced through CD40/CD40L complex inhibition.

CONCLUSION

This study supports the idea that several organs are exposed during ALI development, and particularly when such experimental ALI aims at mimicking transfusion-associated ALI; nevertheless, preventive treatment inhibiting CD40/CD40L (sCD40L) complex formation provides protection from lung disease as well as disease of other organs.