The Irvine Lab has summer backpacking down to a T (cell). New work, published in Nature Biotechnology, describes how this Marble Center for Cancer Nanomedicine team is using nanoparticle "backpacks" to improve efficacy and lower toxicity of adoptive T cell therapy against solid tumors. Their latest particles can carry 100-fold more drug than their predecessors and will release their cargo only when the immune cells carrying them reach the tumor and become activated. Senior author and principal investigator Darrell Irvine is a co-founder of startup company Torque, which is preparing to blaze a trail into the clinic later this year.