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Effect of positive acceleration exposure on gut barrier in rats

With the development of modern high-performance fighter aircrafts, the requirement of acceleration is growing faster and higher, which is far beyond the tolerance of the pilots. In the process of flight, exposure to positive acceleration ( + Gz) is the most important threat to the tissues and organs of pilots. As we all know, the intestinal barrier is one of the significant barriers to prevent the endogenous pathogenic microorganisms and their toxins. This article reviews the impact of + Gz exposure on the gut barrier with regards to the establishment of + Gz models, the detection of related parameters of the gut barrier, and the damage of + Gz to the intestine, with an aim to improve the basic research of the gastrointestinal system in aviation medicine, and the pilot's health and flight safety.