Verrucarin A (VRA) is a macrocyclic trichothecene mycotoxin produced from Stachybotrys, Fusarium, and Myrothecium. Trichothecenes are frequently found in buildings with water damage but can also be found in contaminated grain. VRA is a small, amphipathic molecule that can move passively across cell membranes. The primary tissues affected by VRA are intestinal and gastric mucosa, bone marrow, and spleen. VRA causes damage to human cells by inhibiting protein and DNA synthesis, disrupting mitochondrial functions, and by producing oxidative stress (due to generation of free radicals).
Exposure to VRA can cause immunological problems, vomiting, skin dermatitis, and hemorrhagic lesions.
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