Controlled Human Malaria Infection Leads to Long-Lasting Changes in Innate and Innate-like Lymphocyte Populations.
Details
Serval ID
serval:BIB_F872E86AA7F8
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Controlled Human Malaria Infection Leads to Long-Lasting Changes in Innate and Innate-like Lymphocyte Populations.
Journal
Journal of immunology
ISSN
1550-6606 (Electronic)
ISSN-L
0022-1767
Publication state
Published
Issued date
01/07/2017
Peer-reviewed
Oui
Volume
199
Number
1
Pages
107-118
Language
english
Notes
Publication types: Journal Article ; Randomized Controlled Trial ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Publication Status: ppublish
Abstract
Animal model studies highlight the role of innate-like lymphocyte populations in the early inflammatory response and subsequent parasite control following Plasmodium infection. IFN-γ production by these lymphocytes likely plays a key role in the early control of the parasite and disease severity. Analyzing human innate-like T cell and NK cell responses following infection with Plasmodium has been challenging because the early stages of infection are clinically silent. To overcome this limitation, we examined blood samples from a controlled human malaria infection (CHMI) study in a Tanzanian cohort, in which volunteers underwent CHMI with a low or high dose of Plasmodium falciparum sporozoites. The CHMI differentially affected NK, NKT (invariant NKT), and mucosal-associated invariant T cell populations in a dose-dependent manner, resulting in an altered composition of this innate-like lymphocyte compartment. Although these innate-like responses are typically thought of as short-lived, we found that changes persisted for months after the infection was cleared, leading to significantly increased frequencies of mucosal-associated invariant T cells 6 mo postinfection. We used single-cell RNA sequencing and TCR αβ-chain usage analysis to define potential mechanisms for this expansion. These single-cell data suggest that this increase was mediated by homeostatic expansion-like mechanisms. Together, these data demonstrate that CHMI leads to previously unappreciated long-lasting alterations in the human innate-like lymphocyte compartment. We discuss the consequences of these changes for recurrent parasite infection and infection-associated pathologies and highlight the importance of considering host immunity and infection history for vaccine design.
Keywords
Adult, Host-Pathogen Interactions, Humans, Immunity, Innate, Immunity, Mucosal, Interferon-gamma/immunology, Killer Cells, Natural/immunology, Lymphocyte Subsets/immunology, Malaria Vaccines, Malaria, Falciparum/immunology, Malaria, Falciparum/parasitology, Male, Mucosal-Associated Invariant T Cells/immunology, Parasitemia/immunology, Plasmodium falciparum/immunology, Plasmodium falciparum/physiology, Sporozoites/immunology, Tanzania, Time Factors, Young Adult
Pubmed
Web of science
Open Access
Yes
Create date
28/02/2022 12:45
Last modification date
23/03/2024 8:24