Canna~Fangled Abstracts Δ9-Tetrahydrocannabinol attenuates allogeneic host-versus-graft response and delays skin graft rejection through activation of cannabinoid receptor 1 and induction of myeloid-derived suppressor cells. Journal List > J Leukoc Biol > PMC4541500 J Leukoc Biol. 2015 Sep; 98(3): 435–447. Published online 2015 Jun…Freedom WaresJune 1, 2015