Therapeutic proteins can hitch a ride on parasite to bypass blood-brain barrier

Toxoplasma

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Toxoplasma could be delivery agent for protein drugs – provided parasite can be made safe

An engineered parasite could be used to deliver therapeutic proteins to patients’ brains.

The blood-brain barrier protects animals’ brains by excluding large molecules and almost all proteins. This makes it challenging to deliver therapeutic proteins to the brain. However, the parasite Toxoplasma gondii has a natural proclivity to cross the blood-brain barrier of people and most other warm-blooded animals.