The US Pharmacopeia (USP) published Chapter <86> Bacterial Endotoxins Test Using Recombinant Reagents into the United States Pharmacopeia–National Formulary (USP–NF) in November 2024. The chapter permits the use of non-animal-derived reagents for endotoxin testing and is part of USP’s commitment to expanding the use of animal-free methods and materials (1).
Endotoxins, which are present in the environment, can have dangerous effects if they are contained in pharmaceutical products. Gram-negative bacterial endotoxins are difficult to destroy, according to Nicola Reid, Associate Director Product Management, Endotoxin Products at Charles River Laboratories. “When [endotoxins] do end up in a final product, [and] when that [product] is injected or implanted into a patient, it can lead to what we call a pyrogenic response. What that means is the human body is reacting to this contaminant, and it can cause anything from a mild fever all the way through to death. That's the ultimate circumstance of too much endotoxin. So, therefore, most pharmaceutical products that are tested for endotoxin are those that are injectable or implantable and come into contact with the bloodstream, and therefore have to have low levels of endotoxin.”