Antioxidant defense of the midgut epithelium by the peritrophic envelope in caterpillars.


The peritrophic envelope (PE) is an extracellular matrix that is secreted by the midgut epithelium in most arthropods. In addition to protecting the midgut epithelium from abrasive food particles and microbial pathogens, in vitro experiments have suggested that the PE functions as a radical-scavenging antioxidant in caterpillars. This study tested the… (More)