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Bacterial protein shows promise in treating intestinal parasites

okworm infection.

"It worked on the first day," said Aroian. "Laboratory animals treated with Cry5B survived a lethal hookworm infection, and showed no side effects from the medication."

Colleagues in Cappello's lab then carried out additional experiments that demonstrated that Cry5B was comparable to mebendazole for treating hookworm infection in laboratory animals. Additional studies also determined which life cycle stages of the parasite were most susceptible to Cry5B and at what concentrations.

"These experiments confirmed that the mechanism of action of Cry5B in Ancylostoma hookworms appears to be identical to that for other nematodes, including C. elegans," said Cappello. "This suggests that crystal proteins will likely have activity against a broad range of nematodes, and could be used to treat children who are often infected with multiple intestinal parasites. Studies are underway to fully define the spectrum of activity of Cry5B as part of its preclinical development as a human therapeutic."


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Contact: Kim McDonald
kmcdonald@ucsd.edu
858-534-7572
University of California - San Diego
25-Sep-2006


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