Aspergillus Flavus Fungus: From 'Pharaoh's Curse' to Leukemia Drug?

Researchers have transformed the toxic fungus Aspergillus flavus, associated with the 'Curse of the Pharaohs,' into a potential treatment for leukemia. This discovery opens new avenues in the search for drugs derived from fungi.

Aspergillus flavus, known for its toxins that cause lung infections, has been linked to the deaths of archaeologists who opened tombs such as those of King Tutankhamun and Casimir IV.

The research team, led by the University of Pennsylvania, isolated and studied ribosomally synthesized and post-translationally modified peptides (RiPPs) from various strains of Aspergillus. They identified four RiPPs with a unique structure of interconnected rings, which they named aspergillimide.

Aspergillimides showed strong effects against leukemic cells in laboratory tests. One variant, modified with a lipid, had similar efficacy to cytarabine and daunorubicin, drugs used to treat leukemia.

The researchers found that aspergillimides disrupt cell division and have limited effects on breast, liver, or lung cancer cells, suggesting a targeted action.

The next step is to test aspergillimides in animal models, with the ultimate goal of clinical evaluation in humans, according to Sherry Gao, associate professor at the University of Pennsylvania.