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ResearchIn-Press PreviewImmunologyInfectious disease
Open Access |
10.1172/JCI200628
1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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Haque, A.
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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1Department of Medicine, Stanford University, Stanford, United States of America
2Division of Hematology, Oncology, Stem Cell Transplantation and Regenerativ, Stanford University, Stanford, United States of America
3Infectious Diseases Research Collaboration, Kampala, Uganda
4Department of Medicine, Division of HIV, ID, and Global Medicine, University of California San Francisco, San Francisco, United States of America
5Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
6Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Parkville, Australia
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Published May 5, 2026 - More info
Plasmodium falciparum (Pf) induces the clonal expansion of antigen-specific type 1 regulatory T (Tr1) cells capable of long-term memory. Tr1 cells comprise nearly 90% of the Pf blood stage antigen-specific CD4+ T cell pool in children. Though, whether Tr1 cells contribute to protection from malaria remains undetermined. To address this critical knowledge gap, we first performed scRNA-seq on gated cell populations and validated CXCR6+ CD127- as new phenotypic markers to enrich for bona-fide Tr1 cells. Importantly, these Tr1 cells potently suppressed the proliferation of other CD4+ T cells in vitro via IL-10 secretion. Among children living in malaria-endemic Uganda, CXCR6+ CD127- Tr1 cells were the dominant responding subset to Pf-infected red blood cell stimulation in vitro. They also rapidly expanded following malaria and expressed IL-10 and IFNγ during infection in vivo. Tr1 abundance correlated with plasma concentrations of granzyme A, IFNγ, IL-10, and LAG3, suggesting that these cells act systemically. Higher CXCR6+ CD127- Tr1 cell frequencies correlated with a lower probability of symptoms given parasitemia but were also associated with delayed parasite clearance among untreated, asymptomatic children. These data suggest that Tr1 cells help mediate clinical immunity to malaria but may also facilitate parasite persistence through mechanisms of immune regulation.