Liver-resident memory CD8+ T cells form a front-line defense against malaria liver-stage infection

TitleLiver-resident memory CD8+ T cells form a front-line defense against malaria liver-stage infection
Publication TypeJournal Article
Year of Publication2016
AuthorsFernandez-Ruiz D, Ng WYi, Holz LE, Ma JZ, Zaid A, Wong YChun, Lau LShong, Mollard V, Cozijnsen A, Collins N, Li J, Davey GM, Kato Y, Devi S, Skandari R, Pauley M, Manton JH, Godfrey DI, Braun A, Tay SSzun, Tan PSzee, Bowen DG, Koch-Nolte F, Rissiek B, Carbone FR, Crabb BS, Lahoud M, Cockburn IA, Mueller SN, Bertolino P, McFadden GI, Caminschi I, Heath WR
JournalImmunity
Volume45
Issue4
Date Published10/2016
Abstract

In recent years, various intervention strategies have reduced malaria morbidity and mortality, but further improvements probably depend upon development of a broadly protective vaccine. To better understand immune requirement for protection, we examined liver-stage immunity after vaccination with irradiated sporozoites, an effective though logistically difficult vaccine. We identified a population of memory CD8+ T cells that expressed the gene signature of tissue-resident memory T (Trm) cells and remained permanently within the liver, where they patrolled the sinusoids. Exploring the requirements for liver Trm cell induction, we showed that by combining dendritic cell-targeted priming with liver inflammation and antigen recognition on hepatocytes, high frequencies of Trm cells could be induced and these cells were essential for protection against malaria sporozoite challenge. Our study highlights the immune potential of liver Trm cells and provides approaches for their selective transfer, expansion, or depletion, which may be harnessed to control liver infections or autoimmunity.

URLhttps://www.sciencedirect.com/science/article/pii/S1074761316303351
DOI10.1016/j.immuni.2016.08.011