WashU Genetically Modifies Human Hookworms to Deliver Tetrodotoxin Antitoxin, Partially Neutralizing a Deadly Toxin
Updated
Updated · WashU Medicine · Jun 3
WashU Genetically Modifies Human Hookworms to Deliver Tetrodotoxin Antitoxin, Partially Neutralizing a Deadly Toxin
2 articles · Updated · WashU Medicine · Jun 3
Summary
Nature Communications published the first successful genetic modification of a human hookworm, with WashU researchers showing the parasite can secrete an anti-tetrodotoxin antibody inside animal hosts.
Hamsters colonized with the engineered worms had blood that partially neutralized tetrodotoxin, while blood from animals carrying unmodified worms showed no neutralizing activity.
The team chose hookworms because a controlled dose can live in the small intestine for years, cannot multiply inside the host, and can be cleared within 24 hours with one oral anti-parasitic drug.
DARPA funded the proof-of-concept to explore protection against biological or chemical threats in remote settings, where continuous in-body drug delivery could be useful.
Researchers said the platform still needs optimization and safety testing, but they see potential for gut diseases, food allergies and other conditions needing low, sustained drug exposure.
Living drugs: Will engineered hookworms beat implantable bioreactors in the race to end chronic injections?
Could a genetically engineered parasite become your permanent, personal pharmacy for life?
Living Drug Factories: Genetically Engineered Hookworms Neutralize Toxins and Pave the Way for Next-Generation Therapies
Overview
Researchers led by Makedonka Mitreva have achieved the first successful genetic modification of human hookworms, engineering them to produce an antibody that neutralizes the deadly neurotoxin tetrodotoxin (TTX). These modified hookworms can colonize an animal host and secrete the antitoxin directly into the bloodstream, where it partially inactivates TTX. This direct delivery shows the potential for hookworms to act as continuous, in-vivo therapeutic agents. The breakthrough represents a promising new approach in biotechnology and marks a significant advance in functional genomics for hookworms and related parasites.