» Articles » PMID: 34731605

Expeditious Recruitment of Circulating Memory CD8 T cells to the Liver Facilitates Control of Malaria

Abstract

Circulating memory CD8 T cell trafficking and protective capacity during liver-stage malaria infection remains undefined. We find that effector memory CD8 T cells (Tem) infiltrate the liver within 6 hours after malarial or bacterial infections and mediate pathogen clearance. Tem recruitment coincides with rapid transcriptional upregulation of inflammatory genes in Plasmodium-infected livers. Recruitment requires CD8 T cell-intrinsic LFA-1 expression and the presence of liver phagocytes. Rapid Tem liver infiltration is distinct from recruitment to other non-lymphoid tissues in that it occurs both in the absence of liver tissue resident memory "sensing-and-alarm" function and ∼42 hours earlier than in lung infection by influenza virus. These data demonstrate relevance for Tem in protection against malaria and provide generalizable mechanistic insights germane to control of liver infections.

Citing Articles

Early Activation of Lung CD8 T Cells After Immunization with Live Malaria Sporozoites.

van Schuijlenburg R, Naar C, van der Wees S, Chevalley-Maurel S, Duszenko N, de Bes-Roeleveld H Pathog Immun. 2025; 10(2):46-68.

PMID: 40062354 PMC: 11888604. DOI: 10.20411/pai.v10i2.794.


Memory Cells in Infection and Autoimmunity: Mechanisms, Functions, and Therapeutic Implications.

Giri S, Batra L Vaccines (Basel). 2025; 13(2).

PMID: 40006751 PMC: 11860616. DOI: 10.3390/vaccines13020205.


A replication competent Plasmodium falciparum parasite completely attenuated by dual gene deletion.

Goswami D, Patel H, Betz W, Armstrong J, Camargo N, Patil A EMBO Mol Med. 2024; 16(4):723-754.

PMID: 38514791 PMC: 11018819. DOI: 10.1038/s44321-024-00057-7.


CD8 Trms against malaria liver-stage: prospects and challenges.

Zhu C, Jiao S, Xu W Front Immunol. 2024; 15:1344941.

PMID: 38318178 PMC: 10839007. DOI: 10.3389/fimmu.2024.1344941.


Accelerated prime-and-trap vaccine regimen in mice using repRNA-based CSP malaria vaccine.

MacMillen Z, Hatzakis K, Simpson A, Shears M, Watson F, Erasmus J NPJ Vaccines. 2024; 9(1):12.

PMID: 38200025 PMC: 10781674. DOI: 10.1038/s41541-023-00799-4.


References
1.
Kurup S, Butler N, Harty J . T cell-mediated immunity to malaria. Nat Rev Immunol. 2019; 19(7):457-471. PMC: 6599480. DOI: 10.1038/s41577-019-0158-z. View

2.
Borges da Silva H, Wang H, Qian L, Hogquist K, Jameson S . ARTC2.2/P2RX7 Signaling during Cell Isolation Distorts Function and Quantification of Tissue-Resident CD8 T Cell and Invariant NKT Subsets. J Immunol. 2019; 202(7):2153-2163. PMC: 6424602. DOI: 10.4049/jimmunol.1801613. View

3.
Guidotti L, Inverso D, Sironi L, Di Lucia P, Fioravanti J, Ganzer L . Immunosurveillance of the liver by intravascular effector CD8(+) T cells. Cell. 2015; 161(3):486-500. PMC: 11630812. DOI: 10.1016/j.cell.2015.03.005. View

4.
Mackay L, Minnich M, Kragten N, Liao Y, Nota B, Seillet C . Hobit and Blimp1 instruct a universal transcriptional program of tissue residency in lymphocytes. Science. 2016; 352(6284):459-63. DOI: 10.1126/science.aad2035. View

5.
Schmidt N, Podyminogin R, Butler N, Badovinac V, Tucker B, Bahjat K . Memory CD8 T cell responses exceeding a large but definable threshold provide long-term immunity to malaria. Proc Natl Acad Sci U S A. 2008; 105(37):14017-22. PMC: 2544571. DOI: 10.1073/pnas.0805452105. View