Trained immunity can be defined as a de-facto innate immune memory that induces enhanced inflammatory and antimicrobial properties in innate immune cells.  Innate immune cells can be trained to exhibit an enhanced and lasting response to subsequent infections with microbial components. Importantly, this boosted response can be triggered against pathogens diverse from those that induce the training. However, improving the heterologous response of trained innate immune cells remains complicated.

CNIC, Syracuse University and SUNY Upstate Medical University researchers have discovered that the use of SHIP-1 inhibitors, enhance the non-specific response of trained innate immune cells. This increased activity may offer an improved prophylactic treatment or prevention of subsequent infections.