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
Pagination889-902
Date Published2016 10 18
ISSN1097-4180
KeywordsAnimals, CD8-Positive T-Lymphocytes, Culicidae, Dendritic Cells, Hepatocytes, Immunologic Memory, Liver, Liver Diseases, Malaria, Malaria Vaccines, Mice, Plasmodium berghei, Sporozoites, Vaccination
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.

DOI10.1016/j.immuni.2016.08.011
Alternate JournalImmunity
PubMed ID27692609