MIT Study Reboots Aging Immunity by Turning Liver Into a T-Cell Factory

MIT researchers demonstrated in aging mice that delivering mRNA encoding key immune-signaling pathways causes the liver to transiently manufacture factors that boost thymus-driven T-cell production. This rejuvenation improved immune responses to vaccines and cancer immunotherapy with minimal side effects, and slowed tumor progression in treated mice. The therapy has not been tested in humans and would require ongoing injections to maintain benefits, but it represents a potential approach to counteract age-related immune decline and possibly broader aging processes.