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Red blood cell ‘hitchhikers’ offer new way to transport drugs to specific targets

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Posted August 9, 2018

A new drug-delivery technology which uses red blood cells (RBCs) to shuttle nano-scale drug carriers, called RBC-hitchhiking (RH), has been found in animal models to dramatically increase the concentration of drugs ferried precisely to selected organs, according to a study published in Nature Communications this month by researchers from the Perelman School of Medicine. This proof-of-principle study points to ways to improve drug delivery for some of the nation’s biggest killers, such as acute lung disease, stroke, and heart attack.

“The vast majority of drugs fail because they spread throughout the body, landing in nearby organs where they can cause intolerable side effects, as opposed to directly targeting the areas that are really in need,” said first author Jake Brenner, an assistant professor of pulmonary medicine and critical care and of pharmacology. “By massively increasing the drug concentrations that are hitting specific tissues, the RBC hitchhikers should decrease potential side effects and improve the efficacy of drugs delivered to target organs.”

The team showed that RH can safely transport nano-scale carriers of drugs to chosen organs by targeted placement of intravascular catheters, in mice, pigs, and in ex vivo human lungs, without causing RBC or organ toxicities.

“Red blood cells are a particularly attractive carrier due to their biocompatibility and known safety in transfusions,” said senior author Vladimir Muzykantov, a professor of systems pharmacology and translational therapeutics. “In just a few short years since we began this work, we are now on the brink of mapping out ways to test it in clinical trials.”

Source: University of Pennsylvania

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