1
|
Lu J, Hu Z, Jiang H, Wen Z, Li H, Li J, Zeng K, Xie Y, Chen H, Su XZ, Cai C, Yu X. Dual nature of type I interferon responses and feedback regulations by SOCS1 dictate malaria mortality. J Adv Res 2024:S2090-1232(24)00370-9. [PMID: 39181199 DOI: 10.1016/j.jare.2024.08.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 08/20/2024] [Accepted: 08/21/2024] [Indexed: 08/27/2024] Open
Abstract
INTRODUCTION Type I interferon (IFN-I, IFN-α/β), precisely controlled by multiple regulators, including suppressor of cytokine signaling 1 (SOCS1), is critical for host defense against pathogens. However, the impact of IFN-α/β on malaria parasite infections, beneficial or detrimental, remains controversial. OBJECTIVES The contradictory results are suspected to arise from differences in parasite species and host genetic backgrounds. To date, no prior study has employed a comparative approach utilizing two parasite models to investigate the underlying mechanisms of IFN-I response. Moreover, whether and how SOCS1 involves in the distinct IFN-α/β dynamics is still unclear. METHODS Here we perform single-cell RNA sequencing analyses (scRNA-seq) to dissect the dynamics of IFN-α/β responses against P. yoelii 17XL (17XL) and P. berghei ANKA (PbANKA) infections; conduct flow cytometry analysis and functional depletion to identify key cellular players induced by IFN-I; and establish mathematical models to explore the mechanisms underlying the differential IFN-I dynamics regulated by SOCS1. RESULTS 17XL stimulates an early protective but insufficient toll-like receptor 7 (TLR7)-interferon regulatory factor 7 (IRF7)-dependent IFN-α/β response, resulting in CD11ahiCD49dhiCD4+ T cell activation to enhance anti-malarial immunity. On the contrary, a late IFN-α/β induction through toll-like receptor 9 (TLR9)-IRF7/ stimulator of interferon genes (STING)- interferon regulatory factor 3 (IRF3) dependent pathways expands programmed cell death protein 1 (PD-1)+CD8+ T cells and impairs host immunity during PbANKA infection. Furthermore, functional assay and mathematical modeling show that SOCS1 significantly suppresses IFN-α/β production via negative feedback and incoherent feed-forward loops (I1-FFL). Additionally, differential activation patterns of various transcriptional factors (TFs) synergistically regulate the distinct IFN-I responses. CONCLUSION This study reveals the dual functions of IFN-I in anti-malarial immunity: Early IFN-α/β enhances immune responses against Plasmodium infection by promoting CD11ahiCD49dhiCD4+ T cell, while late IFN-α/β suppresses these response by expanding PD-1+CD8+ T cells. Moreover, both the SOCS1-related network motifs and TFs activation patterns contribute to determine distinct dynamics of IFN-I responses. Hence, our findings suggest therapies targeting SOCS1- or TFs-regulated IFN-I dynamics could be an efficacious approach for preventing malaria and enhancing vaccine efficacy.
Collapse
Affiliation(s)
- Jiansen Lu
- Department of Joint Surgery, the Fifth Affiliated Hospital of Southern Medical University, Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Zhiqiang Hu
- Department of Joint Surgery, the Fifth Affiliated Hospital of Southern Medical University, Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, China; Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Institute of Translational Medicine, Zhejiang University School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310029, China
| | - Huaji Jiang
- Department of Joint Surgery, the Fifth Affiliated Hospital of Southern Medical University, Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Zebin Wen
- Guangdong Provincial Key Lab of Single Cell Technology and Application, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Hongyu Li
- Department of Joint Surgery, the Fifth Affiliated Hospital of Southern Medical University, Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Jian Li
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361000, China
| | - Ke Zeng
- Department of Joint Surgery, the Fifth Affiliated Hospital of Southern Medical University, Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Yingchao Xie
- Department of Joint Surgery, the Fifth Affiliated Hospital of Southern Medical University, Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Huadan Chen
- Department of Joint Surgery, the Fifth Affiliated Hospital of Southern Medical University, Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Xin-Zhuan Su
- Malaria Functional Genomics Section, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Chunmei Cai
- Research Center for High Altitude Medicine, School of Medical, Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province, Qinghai University, Xining, Qinghai 810000, China.
| | - Xiao Yu
- Department of Joint Surgery, the Fifth Affiliated Hospital of Southern Medical University, Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, China; Guangdong Provincial Key Lab of Single Cell Technology and Application, Southern Medical University, Guangzhou, Guangdong 510515, China; Department of Clinical Laboratory Medicine, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, Guangdong 510000, China.
| |
Collapse
|
2
|
Ferrer P, Berry AA, Bucsan AN, Prajapati SK, Krishnan K, Barbeau MC, Rickert DM, Guerrero SM, Usui M, Abebe Y, Patil A, Chakravarty S, Billingsley PF, Pa'ahana-Brown F, Strauss K, Shrestha B, Nomicos E, Deye GA, Sim BKL, Hoffman SL, Williamson KC, Lyke KE. Repeat controlled human Plasmodium falciparum infections delay bloodstream patency and reduce symptoms. Nat Commun 2024; 15:5194. [PMID: 38890271 PMCID: PMC11189388 DOI: 10.1038/s41467-024-49041-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 05/22/2024] [Indexed: 06/20/2024] Open
Abstract
Resistance to clinical malaria takes years to develop even in hyperendemic regions and sterilizing immunity has rarely been observed. To evaluate the maturation of the host response against controlled repeat exposures to P. falciparum (Pf) NF54 strain-infected mosquitoes, we systematically monitored malaria-naïve participants through an initial exposure to uninfected mosquitoes and 4 subsequent homologous exposures to Pf-infected mosquitoes over 21 months (n = 8 males) (ClinicalTrials.gov# NCT03014258). The primary outcome was to determine whether protective immunity against parasite infection develops following repeat CHMI and the secondary outcomes were to track the clinical signs and symptoms of malaria and anti-Pf antibody development following repeat CHMI. After two exposures, time to blood stage patency increases significantly and the number of reported symptoms decreases indicating the development of clinical tolerance. The time to patency correlates positively with both anti-Pf circumsporozoite protein (CSP) IgG and CD8 + CD69+ effector memory T cell levels consistent with partial pre-erythrocytic immunity. IFNγ levels decrease significantly during the participants' second exposure to high blood stage parasitemia and could contribute to the decrease in symptoms. In contrast, CD4-CD8 + T cells expressing CXCR5 and the inhibitory receptor, PD-1, increase significantly after subsequent Pf exposures, possibly dampening the memory response and interfering with the generation of robust sterilizing immunity.
Collapse
Affiliation(s)
- Patricia Ferrer
- Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Rockville, MD, USA
| | - Andrea A Berry
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Allison N Bucsan
- Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Rockville, MD, USA
| | - Surendra K Prajapati
- Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Rockville, MD, USA
| | - Karthik Krishnan
- Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Rockville, MD, USA
| | - Michelle C Barbeau
- Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Rockville, MD, USA
| | - David M Rickert
- Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Rockville, MD, USA
| | - Sandra Mendoza Guerrero
- Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Rockville, MD, USA
| | - Miho Usui
- Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Rockville, MD, USA
| | | | | | | | | | - Faith Pa'ahana-Brown
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Kathy Strauss
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Biraj Shrestha
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Effie Nomicos
- Division of Microbiology and Infectious Diseases, Parasitology and International Programs Branch, NIAID, NIH, Bethesda, MD, USA
| | - Gregory A Deye
- Division of Microbiology and Infectious Diseases, Parasitology and International Programs Branch, NIAID, NIH, Bethesda, MD, USA
| | | | | | - Kim C Williamson
- Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
| | - Kirsten E Lyke
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, MD, USA.
| |
Collapse
|
3
|
Feng X, Yu JL, Sun YF, Du CY, Shen Y, Zhang L, Kong WZ, Han S, Cheng Y. Plasmodium yoelii surface-related antigen (PySRA) modulates the host pro-inflammatory responses via binding to CD68 on macrophage membrane. Infect Immun 2024; 92:e0011324. [PMID: 38624215 PMCID: PMC11075460 DOI: 10.1128/iai.00113-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Accepted: 03/13/2024] [Indexed: 04/17/2024] Open
Abstract
Malaria, one of the major infectious diseases in the world, is caused by the Plasmodium parasite. Plasmodium antigens could modulate the inflammatory response by binding to macrophage membrane receptors. As an export protein on the infected erythrocyte membrane, Plasmodium surface-related antigen (SRA) participates in the erythrocyte invasion and regulates the immune response of the host. This study found that the F2 segment of P. yoelii SRA activated downstream MAPK and NF-κB signaling pathways by binding to CD68 on the surface of the macrophage membrane and regulating the inflammatory response. The anti-PySRA-F2 antibody can protect mice against P. yoelii, and the pro-inflammatory responses such as IL-1β, TNF-α, and IL-6 after infection with P. yoelii are attenuated. These findings will be helpful for understanding the involvement of the pathogenic mechanism of malaria with the exported protein SRA.
Collapse
MESH Headings
- Animals
- Female
- Humans
- Mice
- Antigens, CD/metabolism
- Antigens, CD/immunology
- Antigens, Differentiation, Myelomonocytic/metabolism
- Antigens, Differentiation, Myelomonocytic/immunology
- Antigens, Protozoan/immunology
- Antigens, Protozoan/metabolism
- Antigens, Surface/immunology
- Antigens, Surface/metabolism
- Cell Membrane/metabolism
- Cell Membrane/immunology
- Inflammation/immunology
- Inflammation/metabolism
- Macrophages/immunology
- Macrophages/metabolism
- Macrophages/parasitology
- Malaria/immunology
- Malaria/parasitology
- NF-kappa B/metabolism
- NF-kappa B/immunology
- Plasmodium yoelii/immunology
- Protein Binding
- Signal Transduction
Collapse
Affiliation(s)
- Xin Feng
- Department of Public Health and Preventive Medicine, Laboratory of Pathogen Infection and Immunity, Wuxi School of Medicine, Jiangnan University, Wuxi, China
| | - Jia-Li Yu
- Department of Public Health and Preventive Medicine, Laboratory of Pathogen Infection and Immunity, Wuxi School of Medicine, Jiangnan University, Wuxi, China
| | - Yi-Fan Sun
- Department of Public Health and Preventive Medicine, Laboratory of Pathogen Infection and Immunity, Wuxi School of Medicine, Jiangnan University, Wuxi, China
- Department of Laboratory Medicine, Affiliated Hospital of Jiangnan University, Wuxi, Jiangsu, China
| | - Chen-Yan Du
- Department of Public Health and Preventive Medicine, Laboratory of Pathogen Infection and Immunity, Wuxi School of Medicine, Jiangnan University, Wuxi, China
| | - Yao Shen
- Department of Food Quality and Safety, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Lu Zhang
- Department of General Practice, Rongxiang Street Community Health Service Center, Binhu District, Wuxi, China
| | - Wei-Zhong Kong
- Department of Public Health and Preventive Medicine, Laboratory of Pathogen Infection and Immunity, Wuxi School of Medicine, Jiangnan University, Wuxi, China
| | - Su Han
- Department of Public Health and Preventive Medicine, Laboratory of Pathogen Infection and Immunity, Wuxi School of Medicine, Jiangnan University, Wuxi, China
| | - Yang Cheng
- Department of Public Health and Preventive Medicine, Laboratory of Pathogen Infection and Immunity, Wuxi School of Medicine, Jiangnan University, Wuxi, China
| |
Collapse
|
4
|
Obeagu EI. Role of cytokines in immunomodulation during malaria clearance. Ann Med Surg (Lond) 2024; 86:2873-2882. [PMID: 38694310 PMCID: PMC11060309 DOI: 10.1097/ms9.0000000000002019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 03/22/2024] [Indexed: 05/04/2024] Open
Abstract
Malaria remains a significant global health challenge, demanding a deeper understanding of host immune responses for effective clearance of the parasitic infection. Cytokines, as crucial mediators of the immune system, orchestrate a complex interplay during the various stages of malaria infection. Throughout the course of the disease, an intricate balance of pro-inflammatory and anti-inflammatory cytokines dictate the immune response's outcome, influencing parasitic clearance and disease severity. During the initial stages, interleukins such as interleukin-12 (IL-12), interferon-gamma (IFN-γ), and tumour necrosis factor-alpha (TNF-α) play pivotal roles in activating innate immune cells, initiating the anti-parasitic response. Simultaneously, regulatory cytokines like interleukin-10 (IL-10) and transforming growth factor-beta (TGF-β) modulate this immune activation, preventing excessive inflammation and tissue damage. As the infection progresses, a delicate shift occurs, characterized by a transition to adaptive immunity, guided by cytokines like interleukin-4 (IL-4), interleukin-5 (IL-5), and interleukin-13 (IL-13), promoting antibody production and T-cell responses. Notably, the resolution of malaria infection crucially relies on a fine-tuned balance of cytokine networks. Dysregulation or imbalances in these mediators often result in immune hyperactivation, contributing to severe manifestations and prolonged infection. Understanding the multi-faceted roles of cytokines in malaria clearance offers promising avenues for therapeutic interventions. Targeting cytokine pathways to restore immune equilibrium or bolster protective responses could potentially enhance treatment strategies and vaccine development. In conclusion, the pivotal role of cytokines in immunomodulation during malaria clearance underscores their significance as potential targets for therapeutic interventions, offering promising prospects in the global fight against this infectious disease.
Collapse
|
5
|
Segbefia SP, Asandem DA, Amoah LE, Kusi KA. Cytokine gene polymorphisms implicated in the pathogenesis of Plasmodium falciparum infection outcome. Front Immunol 2024; 15:1285411. [PMID: 38404582 PMCID: PMC10884311 DOI: 10.3389/fimmu.2024.1285411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 01/24/2024] [Indexed: 02/27/2024] Open
Abstract
Cytokines play a critical role in the immune mechanisms involved in fighting infections including malaria. Polymorphisms in cytokine genes may affect immune responses during an infection with Plasmodium parasites and immunization outcomes during routine administration of malaria vaccines. These polymorphisms can increase or reduce susceptibility to this deadly infection, and this may affect the physiologically needed balance between anti-inflammatory and pro-inflammatory cytokines. The purpose of this review is to present an overview of the effect of selected cytokine gene polymorphisms on immune responses against malaria.
Collapse
Affiliation(s)
- Selorm Philip Segbefia
- Department of Immunology, Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, Accra, Ghana
- Department of Molecular Medicine, School of Medicine and Dentistry, College of Science, Kwame Nkrumah University of Science and Technology (KNUST), Kumasi, Ghana
| | - Diana Asema Asandem
- Department of Virology, Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, Accra, Ghana
- West African Centre for Cell Biology of Infectious Pathogens, Department of Biochemistry, Cell and Molecular Biology, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana
| | - Linda Eva Amoah
- Department of Immunology, Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, Accra, Ghana
- West African Centre for Cell Biology of Infectious Pathogens, Department of Biochemistry, Cell and Molecular Biology, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana
| | - Kwadwo Asamoah Kusi
- Department of Immunology, Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, Accra, Ghana
- West African Centre for Cell Biology of Infectious Pathogens, Department of Biochemistry, Cell and Molecular Biology, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana
| |
Collapse
|
6
|
Kotepui M, Mala W, Kwankaew P, Mahittikorn A, Ramirez Masangkay F, Uthaisar Kotepui K. A systematic review and meta-analysis of changes in interleukin-8 levels in malaria infection. Cytokine 2023; 169:156262. [PMID: 37327530 DOI: 10.1016/j.cyto.2023.156262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 05/23/2023] [Accepted: 06/02/2023] [Indexed: 06/18/2023]
Abstract
The roles of interleukin-8 (IL-8) in malaria are inconsistent and unclear. This study synthesised evidence for differences in IL-8 levels in patients with malaria of various levels of severity. Relevant studies were searched in Scopus, MEDLINE, Embase, CENTRAL and PubMed from inception to 22 April 2022. Pooled mean differences (MDs) and 95% confidence intervals (CIs) were estimated using the random effects model. Of 1083 articles retrieved from the databases, 34 were included for syntheses. The meta-analysis revealed increased IL-8 levels in individuals with uncomplicated malaria compared with those without malaria (P = 0.04; MD, 25.57 pg/mL; 95% CI, 1.70 to 49.43 pg/mL; I2, 99.53, 4 studies; 400 uncomplicated malaria, 204 uninfected controls). The meta-analysis revealed comparable levels of IL-8 between the two groups (P = 0.10; MD, 74.46 pg/mL; 95% CI, -15.08 to 164.0 pg/mL; I2, 9.03; 4 studies; 133 severe malaria cases, 568 uncomplicated malaria cases). The study found evidence of increased IL-8 levels in individuals with malaria compared with those without malaria. However, no differences were found in IL-8 levels between patients with severe and non-severe malaria. Further research is needed to investigate the IL-8 cytokine levels in patients with malaria of different levels of severity.
Collapse
Affiliation(s)
- Manas Kotepui
- Medical Technology, School of Allied Health Sciences, Walailak University, Tha Sala, Nakhon Si Thammarat, Thailand.
| | - Wanida Mala
- Medical Technology, School of Allied Health Sciences, Walailak University, Tha Sala, Nakhon Si Thammarat, Thailand.
| | - Pattamaporn Kwankaew
- Medical Technology, School of Allied Health Sciences, Walailak University, Tha Sala, Nakhon Si Thammarat, Thailand.
| | - Aongart Mahittikorn
- Department of Protozoology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
| | | | - Kwuntida Uthaisar Kotepui
- Medical Technology, School of Allied Health Sciences, Walailak University, Tha Sala, Nakhon Si Thammarat, Thailand.
| |
Collapse
|
7
|
Diniz SQ, Figueiredo MM, Costa PAC, Martins-Filho OA, Teixeira-Carvalho A, Pereira DB, Shugiro Tada M, Crocco Afonso LC, Kohlhoff M, Zani CL, Gazzinelli RT, Oliveira F, Antonelli LR. Adenosine pathway regulates inflammation during Plasmodium vivax infection. Front Immunol 2023; 14:1193256. [PMID: 37545509 PMCID: PMC10402272 DOI: 10.3389/fimmu.2023.1193256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 06/19/2023] [Indexed: 08/08/2023] Open
Abstract
Background Plasmodium spp. infection triggers the production of inflammatory cytokines that are essential for parasite control, and conversely responsible for symptoms of malaria. Monocytes play a role in host defense against Plasmodium vivax infection and represent the main source of inflammatory cytokines and reactive oxygen species. The anti-inflammatory cytokine IL-10 is a key regulator preventing exacerbated inflammatory responses. Studies suggested that different clinical presentations of malaria are strongly associated with an imbalance in the production of inflammatory and anti-inflammatory cytokines. Methods A convenience sampling of peripheral blood mononuclear cells from Plasmodium vivax-infected patients and healthy donors were tested for the characterization of cytokine and adenosine production and the expression of ectonucleotidases and purinergic receptors. Results Here we show that despite a strong inflammatory response, monocytes also bear a modulatory role during malaria. High levels of IL-10 are produced during P. vivax infection and its production can be triggered in monocytes by P. vivax-infected reticulocytes. Monocytes express high levels of ectonucleotidases, indicating their important role in extracellular ATP modulation and consequently in adenosine production. Plasmatic levels of adenosine are not altered in patients experiencing acute malaria; however, their monocyte subsets displayed an increased expression of P1 purinergic receptors. In addition, adenosine decreases Tumor Necrosis Factor production by monocytes, which was partially abolished with the blockage of the A2a receptor. Conclusion Monocytes have a dual role, attempting to control both the P. vivax infection and the inflammatory response. Purinergic receptor modulators emerge as an untapped approach to ameliorate clinical malaria.
Collapse
Affiliation(s)
- Suelen Queiroz Diniz
- Laboratório de Biologia e Imunologia de Doenças Infecciosas e Parasitárias, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
- Instituto de Ciências Biológicas, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Maria Marta Figueiredo
- Laboratório de Biologia e Imunologia de Doenças Infecciosas e Parasitárias, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
| | - Pedro Augusto Carvalho Costa
- Laboratório de Biologia e Imunologia de Doenças Infecciosas e Parasitárias, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
| | - Olindo Assis Martins-Filho
- Grupo Integrado de Pesquisas em Biomarcadores, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
| | - Andrea Teixeira-Carvalho
- Grupo Integrado de Pesquisas em Biomarcadores, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
| | | | - Mauro Shugiro Tada
- Centro de Pesquisas em Medicina Tropical de Rondônia, Porto Velho, Brazil
| | - Luis Carlos Crocco Afonso
- Instituto de Ciências Exatas e Biológicas, Departamento de Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Brazil
| | - Markus Kohlhoff
- Química de Produtos Naturais Bioativos, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
| | - Carlos Leomar Zani
- Química de Produtos Naturais Bioativos, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
| | - Ricardo Tostes Gazzinelli
- Laboratório de Biologia e Imunologia de Doenças Infecciosas e Parasitárias, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
- Instituto de Ciências Biológicas, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Fabiano Oliveira
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Rockville, MD, United States
| | - Lis Ribeiro Antonelli
- Laboratório de Biologia e Imunologia de Doenças Infecciosas e Parasitárias, Instituto René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
- Instituto de Ciências Biológicas, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| |
Collapse
|
8
|
de Jong GM, Yap XZ, Walk J, Dik WA, McCall MBB, van Genderen PJJ, van Hellemond JJ, Verbon A, Sauerwein RW. Baseline TGF-β correlates with protection after immunization with Plasmodium falciparum sporozoites in the Controlled Human Malaria Infection model. Immunol Lett 2023; 258:20-23. [PMID: 37075916 DOI: 10.1016/j.imlet.2023.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/31/2023] [Accepted: 04/15/2023] [Indexed: 04/21/2023]
Abstract
BACKGROUND Here we assessed a possible relationship between baseline TGF-β concentrations and acquisition of sterile immunity after Plasmodium falciparum sporozoite immunization. METHODS TGF-β concentrations were determined in samples of 65 malaria-naive volunteers in 4 studies either prior to and after challenge infection, or prior to and after first immunizing infection under chemoprophylaxis with P. falciparum sporozoites. RESULTS High baseline TGF-β concentrations were associated with rapid acquisition of sterile protection (p=0.028). CONCLUSION Baseline TGF-β concentrations predict the efficiency of acquisition of sterile immunity following sporozoite immunisation and may represent a steady-state regulatory mechanism to keep in check immune systems with a low threshold for activation.
Collapse
Affiliation(s)
- G M de Jong
- Department of Medical Microbiology, Radboud University Medical Center, Nijmegen, 6500HB, The Netherlands
| | - X Z Yap
- Department of Medical Microbiology, Radboud University Medical Center, Nijmegen, 6500HB, The Netherlands
| | - J Walk
- Department of Medical Microbiology, Radboud University Medical Center, Nijmegen, 6500HB, The Netherlands
| | - W A Dik
- Department of Immunology, Laboratory Medical Immunology, Erasmus MC University Medical Center, Rotterdam, 3015GD, the Netherlands
| | - M B B McCall
- Department of Medical Microbiology, Radboud University Medical Center, Nijmegen, 6500HB, The Netherlands
| | - P J J van Genderen
- Department of Medical Microbiology & Infectious Diseases, Erasmus MC University Medical Center, Rotterdam, 3015 GD, The Netherlands
| | - J J van Hellemond
- Department of Medical Microbiology & Infectious Diseases, Erasmus MC University Medical Center, Rotterdam, 3015 GD, The Netherlands
| | - A Verbon
- Department of Medical Microbiology & Infectious Diseases, Erasmus MC University Medical Center, Rotterdam, 3015 GD, The Netherlands
| | - R W Sauerwein
- Department of Medical Microbiology, Radboud University Medical Center, Nijmegen, 6500HB, The Netherlands.
| |
Collapse
|
9
|
Tembo D, Harawa V, Tran TC, Afran L, Molyneux ME, Taylor TE, Seydel KB, Nyirenda T, Russell DG, Mandala W. The ability of Interleukin-10 to negate haemozoin-related pro-inflammatory effects has the potential to restore impaired macrophage function associated with malaria infection. Malar J 2023; 22:125. [PMID: 37060041 PMCID: PMC10103463 DOI: 10.1186/s12936-023-04539-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 03/21/2023] [Indexed: 04/16/2023] Open
Abstract
BACKGROUND Although pro-inflammatory cytokines are involved in the clearance of Plasmodium falciparum during the early stages of the infection, increased levels of these cytokines have been implicated in the pathogenesis of severe malaria. Amongst various parasite-derived inducers of inflammation, the malarial pigment haemozoin (Hz), which accumulates in monocytes, macrophages and other immune cells during infection, has been shown to significantly contribute to dysregulation of the normal inflammatory cascades. METHODS The direct effect of Hz-loading on cytokine production by monocytes and the indirect effect of Hz on cytokine production by myeloid cells was investigated during acute malaria and convalescence using archived plasma samples from studies investigating P. falciparum malaria pathogenesis in Malawian subjects. Further, the possible inhibitory effect of IL-10 on Hz-loaded cells was examined, and the proportion of cytokine-producing T-cells and monocytes during acute malaria and in convalescence was characterized. RESULTS Hz contributed towards an increase in the production of inflammatory cytokines, such as Interferon Gamma (IFN-γ), Tumor Necrosis Factor (TNF) and Interleukin 2 (IL-2) by various cells. In contrast, the cytokine IL-10 was observed to have a dose-dependent suppressive effect on the production of TNF among other cytokines. Cerebral malaria (CM) was characterized by impaired monocyte functions, which normalized in convalescence. CM was also characterized by reduced levels of IFN-γ-producing T cell subsets, and reduced expression of immune recognition receptors HLA-DR and CD 86, which also normalized in convalescence. However, CM and other clinical malaria groups were characterized by significantly higher plasma levels of pro-inflammatory cytokines than healthy controls, implicating anti-inflammatory cytokines in balancing the immune response. CONCLUSIONS Acute CM was characterized by elevated plasma levels of pro-inflammatory cytokines and chemokines but lower proportions of cytokine-producing T-cells and monocytes that normalize during convalescence. IL-10 is also shown to have the potential to indirectly prevent excessive inflammation. Cytokine production dysregulated by the accumulation of Hz appears to impair the balance of the immune response to malaria and exacerbates pathology.
Collapse
Affiliation(s)
- Dumizulu Tembo
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, Blantyre, Malawi.
| | - Visopo Harawa
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, Blantyre, Malawi
| | - Tam C Tran
- Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Louise Afran
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, Blantyre, Malawi
- Liverpool School of Tropical Medicine, Liverpool, UK
- University of Liverpool, Liverpool, UK
- Kamuzu University of Health Sciences, Blantyre, Malawi
| | - Malcolm E Molyneux
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, Blantyre, Malawi
- Liverpool School of Tropical Medicine, Liverpool, UK
- University of Liverpool, Liverpool, UK
| | - Terrie E Taylor
- Blantyre Malaria Project, Blantyre, Malawi
- Michigan State University, Michigan, USA
| | - Karl B Seydel
- Blantyre Malaria Project, Blantyre, Malawi
- Michigan State University, Michigan, USA
| | | | - David G Russell
- Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Wilson Mandala
- Acadamey of Medical Sciences, Malawi University of Science and Technology, Blantyre, Malawi.
| |
Collapse
|
10
|
Cytokine response in asymptomatic and symptomatic Plasmodium falciparum infections in children in a rural area of south-eastern Gabon. PLoS One 2023; 18:e0280818. [PMID: 36787308 PMCID: PMC9928122 DOI: 10.1371/journal.pone.0280818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 01/09/2023] [Indexed: 02/15/2023] Open
Abstract
Plasmodium falciparum is a parasite that causes asymptomatic or symptomatic malaria infections in humans depending on various factors. These infections are also a major cause of anemia in intertropical countries such as Gabon. Past studies have clearly demonstrated that inflammatory markers such as cytokines play a key role in the pathogenesis of malaria disease. However, the clinical manifestations of severe malaria vary according to the level of transmission and more information is needed to gain a better understanding of the factors involved. As such, the objective of this study was to investigate the circulating levels of nine cytokines in asymptomatic and symptomatic P. falciparum infections in Gabonese children and their roles in the pathogenesis of anemia. Blood samples were collected from 241 children aged 3 to 180 months in Lastourville, south-eastern Gabon. Diagnosis of P. falciparum infection was performed using Rapid Diagnosis Tests, microscopy and nested PCR. Levels in the plasma of the Th1 (IFN-γ, TNF-α, IL-6 and IL-12p70), Th17 (IL-17A and IL-22) and Th2 (IL-10, IL-4 and IL-13) cytokines were measured by ELISA. Data showed that IL-6, IFN-γ, IL-12p70, IL-10, and IL-13 levels were significantly higher in children with symptomatic P. falciparum infection compared to uninfected children. IL-10 levels were significantly higher in symptomatic children than in asymptomatic children, who had moderately increased levels compared to uninfected controls. Moreover, only IL-10 and IL-6 levels were significantly higher in children with severe malarial anemia compared to children with uncomplicated malaria who had significantly lower IL-10 levels than children with moderate malarial anemia. These data indicate that the progression of P. falciparum infection towards an advanced stage in children is accompanied by a significant increase in type Th1 and/or Th2 cytokines. These inflammatory mediators could serve as potential predictors of anemia for malaria patients.
Collapse
|
11
|
Masserey T, Penny MA, Lee TE. Patient variability in the blood-stage dynamics of Plasmodium falciparum captured by clustering historical data. Malar J 2022; 21:300. [PMID: 36289505 PMCID: PMC9608883 DOI: 10.1186/s12936-022-04317-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 10/11/2022] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Mathematical models provide an understanding of the dynamics of a Plasmodium falciparum blood-stage infection (within-host models), and can predict the impact of control strategies that affect the blood-stage of malaria. However, the dynamics of P. falciparum blood-stage infections are highly variable between individuals. Within-host models use different techniques to capture this inter-individual variation. This struggle may be unnecessary because patients can be clustered according to similar key within-host dynamics. This study aimed to identify clusters of patients with similar parasitaemia profiles so that future mathematical models can include an improved understanding of within-host variation. METHODS Patients' parasitaemia data were analyzed to identify (i) clusters of patients (from 35 patients) that have a similar overall parasitaemia profile and (ii) clusters of patients (from 100 patients) that have a similar first wave of parasitaemia. For each cluster analysis, patients were clustered based on key features which previous models used to summarize parasitaemia dynamics. The clustering analyses were performed using a finite mixture model. The centroid values of the clusters were used to parameterize two established within-host models to generate parasitaemia profiles. These profiles (that used the novel centroid parameterization) were compared with profiles that used individual-specific parameterization (as in the original models), as well as profiles that ignored individual variation (using overall means for parameterization). RESULTS To capture the variation of within-host dynamics, when studying the overall parasitaemia profile, two clusters efficiently grouped patients based on their infection length and the height of the first parasitaemia peak. When studying the first wave of parasitaemia, five clusters efficiently grouped patients based on the height of the peak and the speed of the clearance following the peak of parasitaemia. The clusters were based on features that summarize the strength of patient innate and adaptive immune responses. Parameterizing previous within host-models based on cluster centroid values accurately predict individual patient parasitaemia profiles. CONCLUSION This study confirms that patients have personalized immune responses, which explains the variation of parasitaemia dynamics. Clustering can guide the optimal inclusion of within-host variation in future studies, and inform the design and parameterization of population-based models.
Collapse
Affiliation(s)
- Thiery Masserey
- Swiss Tropical and Public Health Institute, Kreuzstrasse 2, 4123, Allschwil, Basel-Land, Switzerland.
- University of Basel, Basel, Switzerland.
| | - Melissa A Penny
- Swiss Tropical and Public Health Institute, Kreuzstrasse 2, 4123, Allschwil, Basel-Land, Switzerland
- University of Basel, Basel, Switzerland
| | - Tamsin E Lee
- Swiss Tropical and Public Health Institute, Kreuzstrasse 2, 4123, Allschwil, Basel-Land, Switzerland
- University of Basel, Basel, Switzerland
| |
Collapse
|
12
|
Olatunde AC, Cornwall DH, Roedel M, Lamb TJ. Mouse Models for Unravelling Immunology of Blood Stage Malaria. Vaccines (Basel) 2022; 10:1525. [PMID: 36146602 PMCID: PMC9501382 DOI: 10.3390/vaccines10091525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 09/05/2022] [Accepted: 09/06/2022] [Indexed: 11/16/2022] Open
Abstract
Malaria comprises a spectrum of disease syndromes and the immune system is a major participant in malarial disease. This is particularly true in relation to the immune responses elicited against blood stages of Plasmodium-parasites that are responsible for the pathogenesis of infection. Mouse models of malaria are commonly used to dissect the immune mechanisms underlying disease. While no single mouse model of Plasmodium infection completely recapitulates all the features of malaria in humans, collectively the existing models are invaluable for defining the events that lead to the immunopathogenesis of malaria. Here we review the different mouse models of Plasmodium infection that are available, and highlight some of the main contributions these models have made with regards to identifying immune mechanisms of parasite control and the immunopathogenesis of malaria.
Collapse
Affiliation(s)
| | | | | | - Tracey J. Lamb
- Department of Pathology, University of Utah, Emma Eccles Jones Medical Research Building, 15 N Medical Drive E, Room 1420A, Salt Lake City, UT 84112, USA
| |
Collapse
|
13
|
Woolley SD, Marquart L, Woodford J, Chalon S, Moehrle JJ, McCarthy JS, Barber BE. Haematological response in experimental human Plasmodium falciparum and Plasmodium vivax malaria. Malar J 2021; 20:470. [PMID: 34930260 PMCID: PMC8685492 DOI: 10.1186/s12936-021-04003-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 12/01/2021] [Indexed: 11/25/2022] Open
Abstract
Background Malaria-associated anaemia, arising from symptomatic, asymptomatic and submicroscopic infections, is a significant cause of morbidity worldwide. Induced blood stage malaria volunteer infection studies (IBSM-VIS) provide a unique opportunity to evaluate the haematological response to early Plasmodium falciparum and Plasmodium vivax infection. Methods This study was an analysis of the haemoglobin, red cell counts, and parasitaemia data from 315 participants enrolled in IBSM-VIS between 2012 and 2019, including 269 participants inoculated with the 3D7 strain of P. falciparum (Pf3D7), 15 with an artemisinin-resistant P. falciparum strain (PfK13) and 46 with P. vivax. Factors associated with the fractional fall in haemoglobin (Hb-FF) were evaluated, and the malaria-attributable erythrocyte loss after accounting for phlebotomy-related losses was estimated. The relative contribution of parasitized erythrocytes to the malaria-attributable erythrocyte loss was also estimated. Results The median peak parasitaemia prior to treatment was 10,277 parasites/ml (IQR 3566–27,815), 71,427 parasites/ml [IQR 33,236–180,213], and 34,840 parasites/ml (IQR 13,302–77,064) in participants inoculated with Pf3D7, PfK13, and P. vivax, respectively. The median Hb-FF was 10.3% (IQR 7.8–13.3), 14.8% (IQR 11.8–15.9) and 11.7% (IQR 8.9–14.5) in those inoculated with Pf3D7, PfK13 and P. vivax, respectively, with the haemoglobin nadir occurring a median 12 (IQR 5–21), 15 (IQR 7–22), and 8 (IQR 7–15) days following inoculation. In participants inoculated with P. falciparum, recrudescence was associated with a greater Hb-FF, while in those with P. vivax, the Hb-FF was associated with a higher pre-treatment parasitaemia and later day of anti-malarial treatment. After accounting for phlebotomy-related blood losses, the estimated Hb-FF was 4.1% (IQR 3.1–5.3), 7.2% (IQR 5.8–7.8), and 4.9% (IQR 3.7–6.1) in participants inoculated with Pf3D7, PfK13, and P. vivax, respectively. Parasitized erythrocytes were estimated to account for 0.015% (IQR 0.006–0.06), 0.128% (IQR 0.068–0.616) and 0.022% (IQR 0.008–0.082) of the malaria-attributable erythrocyte loss in participants inoculated with Pf3D7, PfK13, and P. vivax, respectively. Conclusion Early experimental P. falciparum and P. vivax infection resulted in a small but significant fall in haemoglobin despite parasitaemia only just at the level of microscopic detection. Loss of parasitized erythrocytes accounted for < 0.2% of the total malaria-attributable haemoglobin loss. Supplementary Information The online version contains supplementary material available at 10.1186/s12936-021-04003-7.
Collapse
|
14
|
Abstract
Transforming Growth Factor-β is a potent regulator of the immune system, acting at every stage from thymic differentiation, population of the periphery, control of responsiveness, tissue repair and generation of memory. It is therefore a central player in the immune response to infectious pathogens, but its contribution is often clouded by multiple roles acting on different cells in time and space. Hence, context is all-important in understanding when TGF-β is beneficial or detrimental to the outcome of infection. In this review, a full range of infectious agents from viruses to helminth parasites are explored within this framework, drawing contrasts and general conclusions about the importance of TGF-β in these diseases.
Collapse
Affiliation(s)
- Rick M Maizels
- Wellcome Centre for Integrative Parasitology, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom.
| |
Collapse
|
15
|
In Vitro Characterization of the Innate Immune Pathways Engaged by Live and Inactivated Tick-Borne Encephalitis Virus. Vaccines (Basel) 2021; 9:vaccines9060664. [PMID: 34204532 PMCID: PMC8234070 DOI: 10.3390/vaccines9060664] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 06/07/2021] [Accepted: 06/15/2021] [Indexed: 12/28/2022] Open
Abstract
Tick-borne encephalitis virus (TBEV) infection can lead to inflammation of the central nervous system. The disease can be effectively prevented by whole inactivated virus vaccines. Here, we investigated the innate immune profile induced in vitro by the antigen component of the vaccines, inactivated TBEV (I-TBEV), to gain insights into the mechanism of action of the TBE vaccine as compared to the live virus. To this end, we exposed human peripheral blood mononuclear cells (PBMCs) to inactivated and live TBEV and assessed cellular responses by RNA sequencing. Both inactivated and live TBEV significantly induced an interferon-dominated gene signature and an increased RIG-I-like receptor (RLR) expression. Using pathway-specific inhibitors, we assessed the involvement of pattern recognition receptors in the sensing of inactivated or live TBEV. Only RLR pathway inhibition significantly suppressed the downstream cascade induced by I-TBEV, while responses to the replicating virus were impacted by the inhibition of RIG-I-like, as well as Toll-like, receptors. Our results show that inactivated and live TBEV predominantly engaged an interferon response in our in vitro PBMC platform, and indicate RLRs as the main pattern recognition receptors involved in I-TBEV sensing.
Collapse
|
16
|
Das S, Tripathy S, Pramanik P, Saha B, Roy S. A novel nano-anti-malarial induces redox damage and elicits cytokine response to the parasite. Cytokine 2021; 144:155555. [PMID: 33992538 DOI: 10.1016/j.cyto.2021.155555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 04/22/2021] [Accepted: 04/27/2021] [Indexed: 10/21/2022]
Abstract
Emergence and spread of resistant parasites to the newest chemotherapeutic anti-malarial agents are the biggest challenges against malaria control programs. Therefore, developing a novel effective treatment to reduce the overgrowing burden of multidrug resistant malaria is a pressing need. Herein, we have developed a biocompatible and biodegradable, non-toxic chitosan-tripolyphosphate-chloroquine (CS-TPP CQ) nanoparticle. CS-TPP CQ nanoparticles effectively kill the parasite through redox generation and induction of the pro- and anti-inflammatory cytokines in both sensitive and resistant parasite in vitro. The in vitro observations showed a strong inhibitory effect (p < 0.01) on pro-inflammatory cytokines more specifically on TNF-α and IFN-γ whereas CS-TPP CQ nanoparticles significantly elevated the anti-inflammatory cytokines- IL-10 and TGF-β. In addition, CS-TPP CQ nanoparticle significantly increased NO generation (p < 0.01) and altered the GSH/GSSG ratio 72 h after parasite co-culture with peripheral blood mononuclear cells culminating in the free radical induced parasite killing. CS-TPP CQ nanoparticle had an effective dose of 100 ng/ml against CQ-sensitive parasite lines (p < 0.001) whereas effective dose against CQ-resistant parasite line was 200 ng/ml CS-TPP CQ with an effective duration of 72 h (p < 0.001). Our studies suggest that CS-TPP CQ nanoparticle has a potential to modulate the pro- and anti-inflammatory responses, and to trigger the redox-mediated parasite killing. It can be a novel nano-based futuristic approach towards malaria control.
Collapse
Affiliation(s)
- Sabyasachi Das
- Faculty of Medicine, Manipal University College Malaysia, Jalan Padang Jambu, Bukit Baru, 75150 Melaka, Malaysia; Immunology and Microbiology Laboratory, Department of Human Physiology with Community Health, Vidyasagar University, Midnapore 721102, West Bengal, India.
| | | | - Panchanan Pramanik
- Nanomaterials Laboratory, Department of Chemistry, Indian Institute of Technology, Kharagpur, 721302 West Bengal, India
| | - Bhaskar Saha
- National Centre for Cell Science, Ganeshkhind, Pune 411007, India
| | - Somenath Roy
- Immunology and Microbiology Laboratory, Department of Human Physiology with Community Health, Vidyasagar University, Midnapore 721102, West Bengal, India.
| |
Collapse
|
17
|
Guha R, Mathioudaki A, Doumbo S, Doumtabe D, Skinner J, Arora G, Siddiqui S, Li S, Kayentao K, Ongoiba A, Zaugg J, Traore B, Crompton PD. Plasmodium falciparum malaria drives epigenetic reprogramming of human monocytes toward a regulatory phenotype. PLoS Pathog 2021; 17:e1009430. [PMID: 33822828 PMCID: PMC8023468 DOI: 10.1371/journal.ppat.1009430] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 02/27/2021] [Indexed: 12/24/2022] Open
Abstract
In malaria-naïve children and adults, Plasmodium falciparum-infected red blood cells (Pf-iRBCs) trigger fever and other symptoms of systemic inflammation. However, in endemic areas where individuals experience repeated Pf infections over many years, the risk of Pf-iRBC-triggered inflammatory symptoms decreases with cumulative Pf exposure. The molecular mechanisms underlying these clinical observations remain unclear. Age-stratified analyses of uninfected, asymptomatic Malian individuals before the malaria season revealed that monocytes of adults produced lower levels of inflammatory cytokines (IL-1β, IL-6 and TNF) in response to Pf-iRBC stimulation compared to monocytes of Malian children and malaria-naïve U.S. adults. Moreover, monocytes of Malian children produced lower levels of IL-1β and IL-6 following Pf-iRBC stimulation compared to 4-6-month-old infants. Accordingly, monocytes of Malian adults produced more IL-10 and expressed higher levels of the regulatory molecules CD163, CD206, Arginase-1 and TGM2. These observations were recapitulated in an in vitro system of monocyte to macrophage differentiation wherein macrophages re-exposed to Pf-iRBCs exhibited attenuated inflammatory cytokine responses and a corresponding decrease in the epigenetic marker of active gene transcription, H3K4me3, at inflammatory cytokine gene loci. Together these data indicate that Pf induces epigenetic reprogramming of monocytes/macrophages toward a regulatory phenotype that attenuates inflammatory responses during subsequent Pf exposure. Trial Registration: ClinicalTrials.gov NCT01322581.
Collapse
Affiliation(s)
- Rajan Guha
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, United States of America
- * E-mail: (RG); (PDC)
| | - Anna Mathioudaki
- Structural and Computational Biology Unit, The European Molecular Biology Laboratory, Heidelberg, Germany
| | - Safiatou Doumbo
- Malaria Research and Training Centre, Department of Epidemiology of Parasitic Diseases, International Center of Excellence in Research, University of Sciences, Technique and Technology of Bamako, Bamako, Mali
| | - Didier Doumtabe
- Malaria Research and Training Centre, Department of Epidemiology of Parasitic Diseases, International Center of Excellence in Research, University of Sciences, Technique and Technology of Bamako, Bamako, Mali
| | - Jeff Skinner
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, United States of America
| | - Gunjan Arora
- Section of Infectious Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, United States of America
| | - Shafiuddin Siddiqui
- Laboratory of Genome Integrity, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Shanping Li
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, United States of America
| | - Kassoum Kayentao
- Malaria Research and Training Centre, Department of Epidemiology of Parasitic Diseases, International Center of Excellence in Research, University of Sciences, Technique and Technology of Bamako, Bamako, Mali
| | - Aissata Ongoiba
- Malaria Research and Training Centre, Department of Epidemiology of Parasitic Diseases, International Center of Excellence in Research, University of Sciences, Technique and Technology of Bamako, Bamako, Mali
| | - Judith Zaugg
- Structural and Computational Biology Unit, The European Molecular Biology Laboratory, Heidelberg, Germany
| | - Boubacar Traore
- Malaria Research and Training Centre, Department of Epidemiology of Parasitic Diseases, International Center of Excellence in Research, University of Sciences, Technique and Technology of Bamako, Bamako, Mali
| | - Peter D. Crompton
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, United States of America
- * E-mail: (RG); (PDC)
| |
Collapse
|
18
|
Milne K, Ivens A, Reid AJ, Lotkowska ME, O'Toole A, Sankaranarayanan G, Munoz Sandoval D, Nahrendorf W, Regnault C, Edwards NJ, Silk SE, Payne RO, Minassian AM, Venkatraman N, Sanders MJ, Hill AVS, Barrett M, Berriman M, Draper SJ, Rowe JA, Spence PJ. Mapping immune variation and var gene switching in naive hosts infected with Plasmodium falciparum. eLife 2021; 10:e62800. [PMID: 33648633 PMCID: PMC7924948 DOI: 10.7554/elife.62800] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 02/09/2021] [Indexed: 02/06/2023] Open
Abstract
Falciparum malaria is clinically heterogeneous and the relative contribution of parasite and host in shaping disease severity remains unclear. We explored the interaction between inflammation and parasite variant surface antigen (VSA) expression, asking whether this relationship underpins the variation observed in controlled human malaria infection (CHMI). We uncovered marked heterogeneity in the host response to blood challenge; some volunteers remained quiescent, others triggered interferon-stimulated inflammation and some showed transcriptional evidence of myeloid cell suppression. Significantly, only inflammatory volunteers experienced hallmark symptoms of malaria. When we tracked temporal changes in parasite VSA expression to ask whether variants associated with severe disease rapidly expand in naive hosts, we found no transcriptional evidence to support this hypothesis. These data indicate that parasite variants that dominate severe malaria do not have an intrinsic growth or survival advantage; instead, they presumably rely upon infection-induced changes in their within-host environment for selection.
Collapse
Affiliation(s)
- Kathryn Milne
- Institute of Immunology and Infection Research, University of EdinburghEdinburghUnited Kingdom
| | - Alasdair Ivens
- Institute of Immunology and Infection Research, University of EdinburghEdinburghUnited Kingdom
- Centre for Immunity, Infection and Evolution, University of EdinburghEdinburghUnited Kingdom
| | - Adam J Reid
- Wellcome Sanger InstituteCambridgeUnited Kingdom
| | | | - Aine O'Toole
- Centre for Immunity, Infection and Evolution, University of EdinburghEdinburghUnited Kingdom
- Institute of Evolutionary Biology, University of EdinburghEdinburghUnited Kingdom
| | | | - Diana Munoz Sandoval
- Institute of Immunology and Infection Research, University of EdinburghEdinburghUnited Kingdom
- Instituto de Microbiologia, Universidad San Francisco de QuitoQuitoEcuador
| | - Wiebke Nahrendorf
- Institute of Immunology and Infection Research, University of EdinburghEdinburghUnited Kingdom
| | - Clement Regnault
- Wellcome Centre for Integrative Parasitology, University of GlasgowGlasgowUnited Kingdom
- Glasgow Polyomics, University of GlasgowGlasgowUnited Kingdom
| | - Nick J Edwards
- The Jenner Institute, University of OxfordOxfordUnited Kingdom
| | - Sarah E Silk
- The Jenner Institute, University of OxfordOxfordUnited Kingdom
| | - Ruth O Payne
- The Jenner Institute, University of OxfordOxfordUnited Kingdom
| | | | | | | | - Adrian VS Hill
- The Jenner Institute, University of OxfordOxfordUnited Kingdom
| | - Michael Barrett
- Wellcome Centre for Integrative Parasitology, University of GlasgowGlasgowUnited Kingdom
- Glasgow Polyomics, University of GlasgowGlasgowUnited Kingdom
| | | | - Simon J Draper
- The Jenner Institute, University of OxfordOxfordUnited Kingdom
| | - J Alexandra Rowe
- Institute of Immunology and Infection Research, University of EdinburghEdinburghUnited Kingdom
- Centre for Immunity, Infection and Evolution, University of EdinburghEdinburghUnited Kingdom
| | - Philip J Spence
- Institute of Immunology and Infection Research, University of EdinburghEdinburghUnited Kingdom
- Centre for Immunity, Infection and Evolution, University of EdinburghEdinburghUnited Kingdom
| |
Collapse
|
19
|
Turner TC, Arama C, Ongoiba A, Doumbo S, Doumtabé D, Kayentao K, Skinner J, Li S, Traore B, Crompton PD, Götz A. Dendritic cell responses to Plasmodium falciparum in a malaria-endemic setting. Malar J 2021; 20:9. [PMID: 33407502 PMCID: PMC7787131 DOI: 10.1186/s12936-020-03533-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 12/07/2020] [Indexed: 12/25/2022] Open
Abstract
Background Plasmodium falciparum causes the majority of malaria cases worldwide and children in sub-Saharan Africa are the most vulnerable group affected. Non-sterile clinical immunity that protects from symptoms develops slowly and is relatively short-lived. Moreover, current malaria vaccine candidates fail to induce durable high-level protection in endemic settings, possibly due to the immunomodulatory effects of the malaria parasite itself. Because dendritic cells play a crucial role in initiating immune responses, the aim of this study was to better understand the impact of cumulative malaria exposure as well as concurrent P. falciparum infection on dendritic cell phenotype and function. Methods In this cross-sectional study, the phenotype and function of dendritic cells freshly isolated from peripheral blood samples of Malian adults with a lifelong history of malaria exposure who were either uninfected (n = 27) or asymptomatically infected with P. falciparum (n = 8) was assessed. Additionally, plasma cytokine and chemokine levels were measured in these adults and in Malian children (n = 19) with acute symptomatic malaria. Results With the exception of lower plasmacytoid dendritic cell frequencies in asymptomatically infected Malian adults, peripheral blood dendritic cell subset frequencies and HLA-DR surface expression did not differ by infection status. Peripheral blood myeloid dendritic cells of uninfected Malian adults responded to in vitro stimulation with P. falciparum blood-stage parasites by up-regulating the costimulatory molecules HLA-DR, CD80, CD86 and CD40 and secreting IL-10, CXCL9 and CXCL10. In contrast, myeloid dendritic cells of asymptomatically infected Malian adults exhibited no significant responses above the uninfected red blood cell control. IL-10 and CXCL9 plasma levels were elevated in both asymptomatic adults and children with acute malaria. Conclusions The findings of this study indicate that myeloid dendritic cells of uninfected adults with a lifelong history of malaria exposure are able to up-regulate co-stimulatory molecules and produce cytokines. Whether mDCs of malaria-exposed individuals are efficient antigen-presenting cells capable of mounting an appropriate immune response remains to be determined. The data also highlights IL-10 and CXCL9 as important factors in both asymptomatic and acute malaria and add to the understanding of asymptomatic P. falciparum infections in malaria-endemic areas.
Collapse
Affiliation(s)
- Triniti C Turner
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, 20852, USA
| | - Charles Arama
- Malaria Research and Training Centre, Department of Epidemiology of Parasitic Diseases, International Center of Excellence in Research, University of Sciences, Technique, and Technology of Bamako, 91094, Bamako, Mali
| | - Aissata Ongoiba
- Malaria Research and Training Centre, Department of Epidemiology of Parasitic Diseases, International Center of Excellence in Research, University of Sciences, Technique, and Technology of Bamako, 91094, Bamako, Mali
| | - Safiatou Doumbo
- Malaria Research and Training Centre, Department of Epidemiology of Parasitic Diseases, International Center of Excellence in Research, University of Sciences, Technique, and Technology of Bamako, 91094, Bamako, Mali
| | - Didier Doumtabé
- Malaria Research and Training Centre, Department of Epidemiology of Parasitic Diseases, International Center of Excellence in Research, University of Sciences, Technique, and Technology of Bamako, 91094, Bamako, Mali
| | - Kassoum Kayentao
- Malaria Research and Training Centre, Department of Epidemiology of Parasitic Diseases, International Center of Excellence in Research, University of Sciences, Technique, and Technology of Bamako, 91094, Bamako, Mali
| | - Jeff Skinner
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, 20852, USA
| | - Shanping Li
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, 20852, USA
| | - Boubacar Traore
- Malaria Research and Training Centre, Department of Epidemiology of Parasitic Diseases, International Center of Excellence in Research, University of Sciences, Technique, and Technology of Bamako, 91094, Bamako, Mali
| | - Peter D Crompton
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, 20852, USA.
| | - Anton Götz
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, 20852, USA.
| |
Collapse
|
20
|
Drewry LL, Harty JT. Balancing in a black box: Potential immunomodulatory roles for TGF-β signaling during blood-stage malaria. Virulence 2021; 11:159-169. [PMID: 32043415 PMCID: PMC7051139 DOI: 10.1080/21505594.2020.1726569] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Malarial disease caused by Plasmodium parasites challenges the mammalian immune system with a delicate balancing act. Robust inflammatory responses are required to control parasite replication within red blood cells, which if unchecked, can lead to severe anemia and fatality. However, the same inflammatory response that controls parasite replication is also associated with immunopathology and severe disease, as is exemplified by cerebral malaria. A robust literature has identified critical roles for innate, cellular, and humoral immune responses orchestrated by IFN-γ and TH1 type responses in controlling blood stage malarial disease. In contrast, TGF-β and IL-10 have been identified as important anti–inflammatory immunomodulators that help to limit inflammation and pathology during malaria. TGF-β is a pleiotropic cytokine, with the ability to exert a wide variety of context-dependent immunomodulatory roles. The specific mechanisms that allow TGF-β to protect against malarial pathology remain essentially unexplored and offer a promising avenue to dissect the most critical elements of immunomodulation in avoiding severe malaria. Here we discuss potential immunomodulatory roles for TGF-β during malaria in light of recent advances in our understanding of the role of Tregs during blood-stage malaria.
Collapse
Affiliation(s)
- Lisa L Drewry
- Department of Microbiology and Immunology, University of Iowa, Iowa City, IA, USA
| | - John T Harty
- Department of Microbiology and Immunology, University of Iowa, Iowa City, IA, USA.,Department of Pathology, University of Iowa, Iowa City, IA, USA.,Interdisciplinary Graduate Program in Immunology, University of Iowa, Iowa City, IA, USA
| |
Collapse
|
21
|
Cai C, Hu Z, Yu X. Accelerator or Brake: Immune Regulators in Malaria. Front Cell Infect Microbiol 2020; 10:610121. [PMID: 33363057 PMCID: PMC7758250 DOI: 10.3389/fcimb.2020.610121] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 11/09/2020] [Indexed: 12/15/2022] Open
Abstract
Malaria is a life-threatening infectious disease, affecting over 250 million individuals worldwide each year, eradicating malaria has been one of the greatest challenges to public health for a century. Growing resistance to anti-parasitic therapies and lack of effective vaccines are major contributing factors in controlling this disease. However, the incomplete understanding of parasite interactions with host anti-malaria immunity hinders vaccine development efforts to date. Recent studies have been unveiling the complexity of immune responses and regulators against Plasmodium infection. Here, we summarize our current understanding of host immune responses against Plasmodium-derived components infection and mainly focus on the various regulatory mechanisms mediated by recent identified immune regulators orchestrating anti-malaria immunity.
Collapse
Affiliation(s)
- Chunmei Cai
- Research Center for High Altitude Medicine, School of Medical, Qinghai University, Xining, China
- Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province, Qinghai University, Xining, China
| | - Zhiqiang Hu
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Xiao Yu
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Lab of Single Cell Technology and Application, Southern Medical University, Guangzhou, China
| |
Collapse
|
22
|
Bucşan AN, Williamson KC. Setting the stage: The initial immune response to blood-stage parasites. Virulence 2020; 11:88-103. [PMID: 31900030 PMCID: PMC6961725 DOI: 10.1080/21505594.2019.1708053] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/05/2019] [Accepted: 12/09/2019] [Indexed: 01/22/2023] Open
Abstract
Individuals growing up in malaria endemic areas gradually develop protection against clinical malaria and passive transfer experiments in humans have demonstrated that this protection is mediated in part by protective antibodies. However, neither the target antigens, specific effector mechanisms, nor the role of continual parasite exposure have been elucidated, which complicates vaccine development. Progress has been made in defining the innate signaling pathways activated by parasite components, including DNA, RNA, hemozoin, and phospholipids, which initiate the immune response and will be the focus of this review. The challenge that remains within the field is to understand the role of these early responses in the development of protective adaptive responses that clear iRBC and block merozoite invasion so that optimal vaccines and therapeutics may be produced.
Collapse
Affiliation(s)
- Allison N. Bucşan
- Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Kim C. Williamson
- Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| |
Collapse
|
23
|
Guha R, Mathioudaki A, Doumbo S, Doumtabe D, Skinner J, Arora G, Siddiqui S, Li S, Kayentao K, Ongoiba A, Zaugg J, Traore B, Crompton PD. Plasmodium falciparum malaria drives epigenetic reprogramming of human monocytes toward a regulatory phenotype. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2020. [PMID: 33106806 DOI: 10.1101/2020.10.21.346197] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In malaria-naïve children and adults, Plasmodium falciparum -infected red blood cells ( Pf -iRBCs) trigger fever and other symptoms of systemic inflammation. However, in endemic areas where individuals experience repeated Pf infections over many years, the risk of Pf -iRBC-triggered inflammatory symptoms decreases with cumulative Pf exposure. The molecular mechanisms underlying these clinical observations remain unclear. Age-stratified analyses of monocytes collected from uninfected, asymptomatic Malian individuals before the malaria season revealed an inverse relationship between age and Pf -iRBC-inducible inflammatory cytokine (IL-1β, IL-6 and TNF) production, whereas Malian infants and malaria-naïve U.S. adults produced similarly high levels of inflammatory cytokines. Accordingly, monocytes of Malian adults produced more IL-10 and expressed higher levels of the regulatory molecules CD163, CD206, Arginase-1 and TGM2. These observations were recapitulated in an in vitro system of monocyte to macrophage differentiation wherein macrophages re-exposed to Pf -iRBCs exhibited attenuated inflammatory cytokine responses and a corresponding decrease in the epigenetic marker of active gene transcription, H3K4me3, at inflammatory cytokine gene loci. Together these data indicate that Pf induces epigenetic reprogramming of monocytes/macrophages toward a regulatory phenotype that attenuates inflammatory responses during subsequent Pf exposure. These findings also suggest that past malaria exposure could mitigate monocyte-associated immunopathology induced by other pathogens such as SARS-CoV-2. Author Summary The malaria parasite is mosquito-transmitted and causes fever and other inflammatory symptoms while circulating in the bloodstream. However, in regions of high malaria transmission the parasite is less likely to cause fever as children age and enter adulthood, even though adults commonly have malaria parasites in their blood. Monocytes are cells of the innate immune system that secrete molecules that cause fever and inflammation when encountering microorganisms like malaria. Although inflammation is critical to initiating normal immune responses, too much inflammation can harm infected individuals. In Mali, we conducted a study of a malaria-exposed population from infants to adults and found that participants' monocytes produced less inflammation as age increases, whereas monocytes of Malian infants and U.S. adults, who had never been exposed to malaria, both produced high levels of inflammatory molecules. Accordingly, monocytes exposed to malaria in the laboratory became less inflammatory when re-exposed to malaria again later, and these monocytes 'turned down' their inflammatory genes. This study helps us understand how people become immune to inflammatory symptoms of malaria and may also help explain why people in malaria-endemic areas appear to be less susceptible to the harmful effects of inflammation caused by other pathogens such as SARS-CoV-2.
Collapse
|
24
|
Capobianco MP, Cassiano GC, Storti-Melo LM, Pimenta TS, Rodrigues APD, Arruda JEG, Pinto MR, Baptista ARDS, Pratt-Riccio LR, Bonini-Domingos CR, de Oliveira-Ferreira J, Machado RLD. Polymorphism in the IL-1β promoter is associated with IgG antibody response to circumsporozoite protein repeats of Plasmodium vivax. Trans R Soc Trop Med Hyg 2020; 114:858-865. [PMID: 32766886 DOI: 10.1093/trstmh/traa055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 05/18/2020] [Accepted: 07/02/2020] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND It is well established that infection by Plasmodium vivax is a result of host-parasite interactions. In the present study, association with the IL1/IL2 cytokine profiles, anticircumsporozoite protein antibody levels and parasitic loads was evaluated in individuals naturally infected with P. vivax in an endemic area of the Brazilian Amazon. METHODS Molecular diagnosis of P. vivax and variants was performed using the PCR-RFLP method and IL1B -511C>T, IL2 -330T>G and IL2+114T>G polymorphisms were identified using PCR-RFLP and allele-specific PCR. IL-1β and IL-2 cytokine levels were detected by flow cytometry and circumsporozoite protein (CSP) antibodies were measured by ELISA. RESULTS Three variants of P. vivax CSP were identified and VK247 was found to be the most frequent. However, the prevalence and magnitude of IgG antibodies were higher for the VK210 variant. Furthermore, the antibody response to the CSP variants was not associated with the presence of the variant in the infection. Significant differences were observed between the single nucleotide polymorphism (SNP) -511T>C in the IL1B gene and levels of antibodies to the VK247 and P. vivax-like variants, but there were no associations between SNPs in IL1 and IL2 genes and their plasma products. CONCLUSIONS Individuals with the rs16944 CC genotype in the IL1β gene have higher antibody levels to the CSP of P. vivax of VK247 and P. vivax-like variants.
Collapse
Affiliation(s)
| | - Gustavo Capatti Cassiano
- Global Health and Tropical Medicine, Tropical Medicine and Hygiene Institut, Lisboa University, Portugal
| | | | - Tamirys Simão Pimenta
- Laboratory of Malaria Immunogenetics, Evandro Chagas Institute/Health Ministry, Pará, Brazil
| | - Ana Paula Drummond Rodrigues
- Electron Microscopy Laboratory, Evandro Chagas Institute/Health Ministry, University Federal do Pará, Belém, Brazil
| | - José Eduardo Gomes Arruda
- Center of Microorganisms Investigation, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - Marcia Ribeiro Pinto
- Center of Microorganisms Investigation, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | | | | | | | | | - Ricardo Luiz Dantas Machado
- Graduate Program in Biosciences, São Paulo State University, São José do Rio Preto, São Paulo, Brazil.,Center of Microorganisms Investigation, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| |
Collapse
|
25
|
Prah DA, Amoah LE, Gibbins MP, Bediako Y, Cunnington AJ, Awandare GA, Hafalla JCR. Comparison of leucocyte profiles between healthy children and those with asymptomatic and symptomatic Plasmodium falciparum infections. Malar J 2020; 19:364. [PMID: 33036624 PMCID: PMC7547495 DOI: 10.1186/s12936-020-03435-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 10/01/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The immune mechanisms that determine whether a Plasmodium falciparum infection would be symptomatic or asymptomatic are not fully understood. Several studies have been carried out to characterize the associations between disease outcomes and leucocyte numbers. However, the majority of these studies have been conducted in adults with acute uncomplicated malaria, despite children being the most vulnerable group. METHODS Peripheral blood leucocyte subpopulations were characterized in children with acute uncomplicated (symptomatic; n = 25) or asymptomatic (n = 67) P. falciparum malaria, as well as malaria-free (uninfected) children (n = 16) from Obom, a sub-district of Accra, Ghana. Leucocyte subpopulations were enumerated by flow cytometry and correlated with two measures of parasite load: (a) plasma levels of P. falciparum histidine-rich protein 2 (PfHRP2) as a proxy for parasite biomass and (b) peripheral blood parasite densities determined by microscopy. RESULTS In children with symptomatic P. falciparum infections, the proportions and absolute cell counts of total (CD3 +) T cells, CD4 + T cells, CD8 + T cells, CD19 + B cells and CD11c + dendritic cells (DCs) were significantly lower as compared to asymptomatic P. falciparum-infected and uninfected children. Notably, CD15 + neutrophil proportions and cell counts were significantly increased in symptomatic children. There was no significant difference in the proportions and absolute counts of CD14 + monocytes amongst the three study groups. As expected, measures of parasite load were significantly higher in symptomatic cases. Remarkably, PfHRP2 levels and parasite densities negatively correlated with both the proportions and absolute numbers of peripheral leucocyte subsets: CD3 + T, CD4 + T, CD8 + T, CD19 + B, CD56 + NK, γδ + T and CD11c + cells. In contrast, both PfHRP2 levels and parasite densities positively correlated with the proportions and absolute numbers of CD15 + cells. CONCLUSIONS Symptomatic P. falciparum infection is correlated with an increase in the levels of peripheral blood neutrophils, indicating a role for this cell type in disease pathogenesis. Parasite load is a key determinant of peripheral cell numbers during malaria infections.
Collapse
Affiliation(s)
- Diana Ahu Prah
- West African Centre for Cell Biology of Infectious Pathogens, Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Legon, Ghana
- Department of Infection Biology, Faculty of Infectious and Tropical Medicine, London School of Hygiene and Tropical Medicine, London, UK
| | - Linda Eva Amoah
- West African Centre for Cell Biology of Infectious Pathogens, Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Legon, Ghana
- Immunology Department, Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | - Matthew P Gibbins
- Department of Infection Biology, Faculty of Infectious and Tropical Medicine, London School of Hygiene and Tropical Medicine, London, UK
- Wellcome Centre for Integrative Parasitology, Institute of Infection, Immunity and Inflammation,, University of Glasgow, Glasgow, UK
| | - Yaw Bediako
- West African Centre for Cell Biology of Infectious Pathogens, Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Legon, Ghana
| | | | - Gordon A Awandare
- West African Centre for Cell Biology of Infectious Pathogens, Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Legon, Ghana
| | - Julius Clemence R Hafalla
- Department of Infection Biology, Faculty of Infectious and Tropical Medicine, London School of Hygiene and Tropical Medicine, London, UK.
| |
Collapse
|
26
|
Lodde V, Floris M, Beerman I, Munk R, Guha R, Steri M, Orrù V, Abdelmohsen K, Crompton PD, Gorospe M, Idda ML, Cucca F. Evolutionarily Selected Overexpression of the Cytokine BAFF Enhances Mucosal Immune Response Against P. falciparum. Front Immunol 2020; 11:575103. [PMID: 33123155 PMCID: PMC7573158 DOI: 10.3389/fimmu.2020.575103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 08/24/2020] [Indexed: 12/29/2022] Open
Abstract
We have previously shown that a variant of the TNFSF13B gene that we called BAFF-var increases the production of the cytokine BAFF, upregulating humoral immunity and increasing the risk for certain autoimmune diseases. In addition, genetic population signatures revealed that BAFF-var was evolutionarily advantageous, most likely by increasing resistance to malaria infection, which is a prime candidate for selective pressure. To evaluate whether the increased soluble BAFF (sBAFF) production confers protection, we experimentally assessed the role of BAFF-var in response to malaria antigens. Lysates of erythrocytes infected with Plasmodium falciparum (iRBCs) or left uninfected (uRBCs, control) were used to treat peripheral blood mononuclear cells (PBMCs) with distinct BAFF genotypes. The PBMCs purified from BAFF-var donors and treated with iRBCs showed different levels of specific cells, immunoglobulins, and cytokines as compared with BAFF-WT. In particular, a relevant differential effect on mucosal immunity B subpopulations have been observed. These findings point to specific immune cells and molecules through which the evolutionary selected BAFF-var may have improved fitness during P. falciparum infection.
Collapse
Affiliation(s)
- Valeria Lodde
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
- Istituto di Ricerca Genetica e Biomedica, Consiglio Nazionale delle Ricerche (CNR), Monserrato, Italy
| | - Matteo Floris
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
- Istituto di Ricerca Genetica e Biomedica, Consiglio Nazionale delle Ricerche (CNR), Monserrato, Italy
| | - Isabel Beerman
- Epigenetics and Stem Cell Unit, Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, MD, United States
| | - Rachel Munk
- Laboratory of Genetics and Genomics, National Institute on Aging Intramural Research Program, National Institutes of Health, Baltimore, MD, United States
| | - Rajan Guha
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, United States
| | - Maristella Steri
- Istituto di Ricerca Genetica e Biomedica, Consiglio Nazionale delle Ricerche (CNR), Monserrato, Italy
| | - Valeria Orrù
- Istituto di Ricerca Genetica e Biomedica, Consiglio Nazionale delle Ricerche (CNR), Monserrato, Italy
| | - Kotb Abdelmohsen
- Laboratory of Genetics and Genomics, National Institute on Aging Intramural Research Program, National Institutes of Health, Baltimore, MD, United States
| | - Peter D. Crompton
- Malaria Infection Biology and Immunity Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, United States
| | - Myriam Gorospe
- Laboratory of Genetics and Genomics, National Institute on Aging Intramural Research Program, National Institutes of Health, Baltimore, MD, United States
| | - Maria Laura Idda
- Istituto di Ricerca Genetica e Biomedica, Consiglio Nazionale delle Ricerche (CNR), Monserrato, Italy
| | - Francesco Cucca
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
- Istituto di Ricerca Genetica e Biomedica, Consiglio Nazionale delle Ricerche (CNR), Monserrato, Italy
| |
Collapse
|
27
|
Dobaño C, Nhabomba AJ, Manaca MN, Berthoud T, Aguilar R, Quintó L, Barbosa A, Rodríguez MH, Jiménez A, Groves PL, Santano R, Bassat Q, Aponte JJ, Guinovart C, Doolan DL, Alonso PL. A Balanced Proinflammatory and Regulatory Cytokine Signature in Young African Children Is Associated With Lower Risk of Clinical Malaria. Clin Infect Dis 2020; 69:820-828. [PMID: 30380038 DOI: 10.1093/cid/ciy934] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 10/30/2018] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND The effect of timing of exposure to first Plasmodium falciparum infections during early childhood on the induction of innate and adaptive cytokine responses and their contribution to the development of clinical malaria immunity is not well established. METHODS As part of a double-blind, randomized, placebo-controlled trial in Mozambique using monthly chemoprophylaxis with sulfadoxine-pyrimethamine plus artesunate to selectively control timing of malaria exposure during infancy, peripheral blood mononuclear cells collected from participants at age 2.5, 5.5, 10.5, 15, and 24 months were stimulated ex vivo with parasite schizont and erythrocyte lysates. Cytokine messenger RNA expressed in cell pellets and proteins secreted in supernatants were quantified by reverse-transcription quantitative polymerase chain reaction and multiplex flow cytometry, respectively. Children were followed up for clinical malaria from birth until 4 years of age. RESULTS Higher proinflammatory (interleukin [IL] 1, IL-6, tumor necrosis factor) and regulatory (IL-10) cytokine concentrations during the second year of life were associated with reduced incidence of clinical malaria up to 4 years of age, adjusting by chemoprophylaxis and prior malaria exposure. Significantly lower concentrations of antigen-specific T-helper 1 (IL-2, IL-12, interferon-γ) and T-helper 2 (IL-4, IL-5) cytokines by 2 years of age were measured in children undergoing chemoprophylaxis compared to children receiving placebo (P < .03). CONCLUSIONS Selective chemoprophylaxis altering early natural exposure to malaria blood stage antigens during infancy had a significant effect on T-helper lymphocyte cytokine production >1 year later. Importantly, a balanced proinflammatory and anti-inflammatory cytokine signature, probably by innate cells, around age 2 years was associated with protective clinical immunity during childhood. CLINICAL TRIALS REGISTRATION NCT00231452.
Collapse
Affiliation(s)
- Carlota Dobaño
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Catalonia, Spain.,Centro de Investigação em Saúde de Manhiça, Maputo, Mozambique.,Centro de Investigación Biomédica en Red Epidemiología y Salud Pública, Barcelona, Spain
| | | | - Maria N Manaca
- Centro de Investigação em Saúde de Manhiça, Maputo, Mozambique
| | - Tamara Berthoud
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Catalonia, Spain
| | - Ruth Aguilar
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Catalonia, Spain.,Centro de Investigação em Saúde de Manhiça, Maputo, Mozambique.,Centro de Investigación Biomédica en Red Epidemiología y Salud Pública, Barcelona, Spain
| | - Llorenç Quintó
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Catalonia, Spain.,Centro de Investigação em Saúde de Manhiça, Maputo, Mozambique.,Centro de Investigación Biomédica en Red Epidemiología y Salud Pública, Barcelona, Spain
| | - Arnoldo Barbosa
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Catalonia, Spain.,Centro de Investigação em Saúde de Manhiça, Maputo, Mozambique
| | - Mauricio H Rodríguez
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Catalonia, Spain.,Centro de Investigação em Saúde de Manhiça, Maputo, Mozambique
| | - Alfons Jiménez
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red Epidemiología y Salud Pública, Barcelona, Spain
| | - Penny L Groves
- Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain
| | - Rebeca Santano
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Catalonia, Spain
| | - Quique Bassat
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Catalonia, Spain.,Centro de Investigação em Saúde de Manhiça, Maputo, Mozambique.,Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain
| | - John J Aponte
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Catalonia, Spain.,Centro de Investigação em Saúde de Manhiça, Maputo, Mozambique.,Centro de Investigación Biomédica en Red Epidemiología y Salud Pública, Barcelona, Spain
| | - Caterina Guinovart
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Catalonia, Spain.,Centro de Investigação em Saúde de Manhiça, Maputo, Mozambique.,Centro de Investigación Biomédica en Red Epidemiología y Salud Pública, Barcelona, Spain
| | - Denise L Doolan
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Pedro L Alonso
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Catalonia, Spain.,Centro de Investigação em Saúde de Manhiça, Maputo, Mozambique.,Centro de Investigación Biomédica en Red Epidemiología y Salud Pública, Barcelona, Spain
| |
Collapse
|
28
|
Akkaya M, Bansal A, Sheehan PW, Pena M, Molina-Cruz A, Orchard LM, Cimperman CK, Qi CF, Ross P, Yazew T, Sturdevant D, Anzick SL, Thiruvengadam G, Otto TD, Billker O, Llinás M, Miller LH, Pierce SK. A single-nucleotide polymorphism in a Plasmodium berghei ApiAP2 transcription factor alters the development of host immunity. SCIENCE ADVANCES 2020; 6:eaaw6957. [PMID: 32076635 PMCID: PMC7002124 DOI: 10.1126/sciadv.aaw6957] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 11/21/2019] [Indexed: 05/07/2023]
Abstract
The acquisition of malaria immunity is both remarkably slow and unpredictable. At present, we know little about the malaria parasite genes that influence the host's ability to mount a protective immune response. Here, we show that a single-nucleotide polymorphism (SNP) resulting in a single amino acid change (S to F) in an ApiAP2 transcription factor in the rodent malaria parasite Plasmodium berghei (Pb) NK65 allowed infected mice to mount a T helper cell 1 (TH1)-type immune response that controlled subsequent infections. As compared to PbNK65S, PbNK65F parasites differentially expressed 46 genes, most of which are predicted to play roles in immune evasion. PbNK65F infections resulted in an early interferon-γ response and a later expansion of germinal centers, resulting in high levels of infected red blood cell-specific TH1-type immunoglobulin G2b (IgG2b) and IgG2c antibodies. Thus, the Pb ApiAP2 transcription factor functions as a critical parasite virulence factor in malaria infections.
Collapse
Affiliation(s)
- Munir Akkaya
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
- Corresponding author. (S.K.P.); (M.A.)
| | - Abhisheka Bansal
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Patrick W. Sheehan
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Mirna Pena
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Alvaro Molina-Cruz
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Lindsey M. Orchard
- Department of Biochemistry and Molecular Biology and Huck Center for Malaria Research, The Pennsylvania State University, University Park, PA, USA
| | - Clare K. Cimperman
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Chen-Feng Qi
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Philipp Ross
- Department of Biochemistry and Molecular Biology and Huck Center for Malaria Research, The Pennsylvania State University, University Park, PA, USA
| | - Takele Yazew
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Daniel Sturdevant
- Research Technologies Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Sarah L. Anzick
- Research Technologies Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Girija Thiruvengadam
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Thomas Dan Otto
- Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK
| | - Oliver Billker
- Department of Molecular Biology, Umeå University, S-90187 Umeå, Sweden
- Laboratory for Molecular Infection Medicine Sweden, Umeå University, S-90187 Umeå, Sweden
| | - Manuel Llinás
- Department of Biochemistry and Molecular Biology and Huck Center for Malaria Research, The Pennsylvania State University, University Park, PA, USA
- Department of Chemistry, Pennsylvania State University, University Park, PA, USA
| | - Louis H. Miller
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Susan K. Pierce
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
- Corresponding author. (S.K.P.); (M.A.)
| |
Collapse
|
29
|
Dobbs KR, Crabtree JN, Dent AE. Innate immunity to malaria-The role of monocytes. Immunol Rev 2020; 293:8-24. [PMID: 31840836 PMCID: PMC6986449 DOI: 10.1111/imr.12830] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 11/19/2019] [Accepted: 11/25/2019] [Indexed: 12/12/2022]
Abstract
Monocytes are innate immune cells essential for host protection against malaria. Upon activation, monocytes function to help reduce parasite burden through phagocytosis, cytokine production, and antigen presentation. However, monocytes have also been implicated in the pathogenesis of severe disease through production of damaging inflammatory cytokines, resulting in systemic inflammation and vascular dysfunction. Understanding the molecular pathways influencing the balance between protection and pathology is critical. In this review, we discuss recent data regarding the role of monocytes in human malaria, including studies of innate sensing of the parasite, immunometabolism, and innate immune training. Knowledge gained from these studies may guide rational development of novel antimalarial therapies and inform vaccine development.
Collapse
Affiliation(s)
- Katherine R. Dobbs
- Center for Global Health and Diseases, Case Western Reserve University, Cleveland, OH, USA
- Division of Pediatric Infectious Diseases, University Hospitals Rainbow Babies and Children’s Hospital, Cleveland, OH, USA
| | - Juliet N. Crabtree
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Arlene E. Dent
- Center for Global Health and Diseases, Case Western Reserve University, Cleveland, OH, USA
- Division of Pediatric Infectious Diseases, University Hospitals Rainbow Babies and Children’s Hospital, Cleveland, OH, USA
| |
Collapse
|
30
|
Yap XZ, McCall MBB, Sauerwein RW. Fast and fierce versus slow and smooth: Heterogeneity in immune responses to Plasmodium in the controlled human malaria infection model. Immunol Rev 2020; 293:253-269. [PMID: 31605396 PMCID: PMC6973142 DOI: 10.1111/imr.12811] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 09/11/2019] [Accepted: 09/13/2019] [Indexed: 12/19/2022]
Abstract
Controlled human malaria infection (CHMI) is an established model in clinical malaria research. Upon exposure to Plasmodium falciparum parasites, malaria-naive volunteers differ in dynamics and composition of their immune profiles and subsequent capacity to generate protective immunity. CHMI volunteers are either inflammatory responders who have prominent cellular IFN-γ production primarily driven by adaptive T cells, or tempered responders who skew toward antibody-mediated humoral immunity. When exposed to consecutive CHMIs under antimalarial chemoprophylaxis, individuals who can control parasitemia after a single immunization (fast responders) are more likely to be protected against a subsequent challenge infection. Fast responders tend to be inflammatory responders who can rapidly induce long-lived IFN-γ+ T cell responses. Slow responders or even non-responders can also be protected, but via a more diverse range of responses that take a longer time to reach full protective efficacy, in part due to their tempered phenotype. The latter group can be identified at baseline before CHMI by higher expression of inhibitory ligands CTLA-4 and TIM-3 on CD4+ T cells. Delineating heterogeneity in human immune responses to P. falciparum will facilitate rational design and strategy towards effective malaria vaccines.
Collapse
Affiliation(s)
- Xi Zen Yap
- Department of Medical MicrobiologyRadboud University Medical CenterNijmegenThe Netherlands
- Radboud Center for Infectious DiseasesRadboud University Medical CenterNijmegenThe Netherlands
| | - Matthew B. B. McCall
- Department of Medical MicrobiologyRadboud University Medical CenterNijmegenThe Netherlands
- Radboud Center for Infectious DiseasesRadboud University Medical CenterNijmegenThe Netherlands
| | - Robert W. Sauerwein
- Department of Medical MicrobiologyRadboud University Medical CenterNijmegenThe Netherlands
- Radboud Center for Infectious DiseasesRadboud University Medical CenterNijmegenThe Netherlands
| |
Collapse
|
31
|
Splenic Innate B1 B Cell Plasmablasts Produce Sustained Granulocyte-Macrophage Colony-Stimulating Factor and Interleukin-3 Cytokines during Murine Malaria Infections. Infect Immun 2019; 87:IAI.00482-19. [PMID: 31591168 DOI: 10.1128/iai.00482-19] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Accepted: 09/24/2019] [Indexed: 12/14/2022] Open
Abstract
The physiopathology of malaria, one of the most deadly human parasitic diseases worldwide, is complex, as it is a systemic disease involving multiple parasitic stages and hosts and leads to the activation of numerous immune cells and release of inflammatory mediators. While some cytokines increased in the blood of patients infected with Plasmodium falciparum have been extensively studied, others, such as granulocyte-macrophage colony-stimulating factor (GM-CSF) and interleukin-3 (IL-3), have not received much attention. GM-CSF and IL-3 belong to the β common (βc/CD131) chain family of cytokines, which exhibit pleiotropic functions, including the regulation of myeloid cell growth, differentiation, and activation. GM-CSF can be secreted by multiple cell types, whereas IL-3 is mostly restricted to T cells, yet innate response activator (IRA) B cells, a subset of innate B1 B cells, also produce significant amounts of these cytokines during bacterial sepsis via Toll-like receptor 4 (TLR4)/MyD88 sensing of lipopolysaccharides. Herein, using murine models of malaria, we report a sustained production of GM-CSF and IL-3 from IgM+ and IgM-/IgG+ CD138+ Blimp-1+ innate B1b B cell plasmablasts. IgM+ B1b B cells include IRA-like and non-IRA B cells and express higher levels of both cytokines than do their IgG+ counterparts. Interestingly, as infection progresses, the relative proportion of IgM+ B1 B cells decreases while that of IgG+ plasmablasts increases, correlating with potential isotype switching of GM-CSF- and IL-3-producing IgM+ B1 B cells. GM-CSF/IL-3+ B1 B cells originate in the spleen of infected mice and are partially dependent on type I and type II interferon signaling to produce both cytokines. These data reveal that GM-CSF and IL-3 are produced during malaria infections, initially from IgM+ and then from IgG+ B1b B cell plasmablasts, which may represent important emergency cellular sources of these cytokines. These results further highlight the phenotypic heterogeneity of innate B1 B cell subsets and of their possible fates in a relevant murine model of parasitic infection in vivo.
Collapse
|
32
|
de Jong GM, McCall MBB, Dik WA, Urbanus RT, Wammes LJ, Koelewijn R, Sauerwein RW, Verbon A, van Hellemond JJ, van Genderen PJJ. Transforming growth factor-beta profiles correlate with clinical symptoms and parameters of haemostasis and inflammation in a controlled human malaria infection. Cytokine 2019; 125:154838. [PMID: 31525609 DOI: 10.1016/j.cyto.2019.154838] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 08/09/2019] [Accepted: 09/04/2019] [Indexed: 12/23/2022]
Abstract
BACKGROUND After a controlled human malaria infection (CHMI), presentation of clinical signs and symptoms and host responses is heterogeneous. Transforming growth factor-beta (TGF-β) is the first serum cytokine that changes in malaria-naïve volunteers after CHMI. We studied a possible relation between TGF-β changes, pro-inflammatory cytokines, activation of haemostasis and endothelial cells and clinical symptoms. METHODS A panel of cytokines including TGF-β, and markers of activation of haemostasis and endothelial cells were measured in blood samples of 15 volunteers at baseline before CHMI and during CHMI at day of treatment. The change of the parameters on the day of treatment was examined for a significant alteration during infection. RESULTS Nine of 15 volunteers showed a significant decrease in TGF-β compared to baseline, with concomitant increased concentrations of D-dimer (p = 0.012), Von Willebrand factor (p = 0.017), IL-6 (p = 0.012) and IFN-γ (0.028) and a significantly decreased platelet count (p = 0.011). In contrast, 6 of 15 volunteers showed sustained or increased TGF-β concentrations without change in the aforementioned parameters. The sustained responders presented with less moderate and severe clinical symptoms than the negative responders (p = 0.036) and had a higher baseline lymphocyte count (p = 0.026). TGF-β concentrations did not correlate with the parasitaemia on day of treatment. CONCLUSION Early decreases of serum TGF-β might function a marker for a pro-inflammatory host response and downstream clinical symptoms and pathology during CHMI.
Collapse
Affiliation(s)
- Gerdie M de Jong
- Department of Medical Microbiology & Infectious Diseases, Erasmus MC University Medical Center, Rotterdam 3015 GD, the Netherlands
| | - Matthew B B McCall
- Department of Medical Microbiology & Infectious Diseases, Erasmus MC University Medical Center, Rotterdam 3015 GD, the Netherlands; Department of Medical Microbiology, Radboud University Medical Center, Nijmegen 6500HB, the Netherlands
| | - Willem A Dik
- Department of Immunology, Laboratory Medical Immunology, Erasmus MC University Medical Center, Rotterdam 3015GD, the Netherlands
| | - Rolf T Urbanus
- Department of Clinical Chemistry and Haematology, 3584 CX, University Medical Center, Utrecht, the Netherlands
| | - Linda J Wammes
- Department of Medical Microbiology & Infectious Diseases, Erasmus MC University Medical Center, Rotterdam 3015 GD, the Netherlands
| | - Rob Koelewijn
- Department of Medical Microbiology & Infectious Diseases, Erasmus MC University Medical Center, Rotterdam 3015 GD, the Netherlands
| | - Robert W Sauerwein
- Department of Medical Microbiology, Radboud University Medical Center, Nijmegen 6500HB, the Netherlands
| | - Annelies Verbon
- Department of Medical Microbiology & Infectious Diseases, Erasmus MC University Medical Center, Rotterdam 3015 GD, the Netherlands
| | - Jaap J van Hellemond
- Department of Medical Microbiology & Infectious Diseases, Erasmus MC University Medical Center, Rotterdam 3015 GD, the Netherlands
| | - Perry J J van Genderen
- Department of Medical Microbiology & Infectious Diseases, Erasmus MC University Medical Center, Rotterdam 3015 GD, the Netherlands.
| |
Collapse
|
33
|
Walk J, de Bree LCJ, Graumans W, Stoter R, van Gemert GJ, van de Vegte-Bolmer M, Teelen K, Hermsen CC, Arts RJW, Behet MC, Keramati F, Moorlag SJCFM, Yang ASP, van Crevel R, Aaby P, de Mast Q, van der Ven AJAM, Stabell Benn C, Netea MG, Sauerwein RW. Outcomes of controlled human malaria infection after BCG vaccination. Nat Commun 2019; 10:874. [PMID: 30787276 PMCID: PMC6382772 DOI: 10.1038/s41467-019-08659-3] [Citation(s) in RCA: 152] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 01/20/2019] [Indexed: 12/05/2022] Open
Abstract
Recent evidence suggests that certain vaccines, including Bacillus-Calmette Guérin (BCG), can induce changes in the innate immune system with non-specific memory characteristics, termed ‘trained immunity’. Here we present the results of a randomised, controlled phase 1 clinical trial in 20 healthy male and female volunteers to evaluate the induction of immunity and protective efficacy of the anti-tuberculosis BCG vaccine against a controlled human malaria infection. After malaria challenge infection, BCG vaccinated volunteers present with earlier and more severe clinical adverse events, and have significantly earlier expression of NK cell activation markers and a trend towards earlier phenotypic monocyte activation. Furthermore, parasitemia in BCG vaccinated volunteers is inversely correlated with increased phenotypic NK cell and monocyte activation. The combined data demonstrate that BCG vaccination alters the clinical and immunological response to malaria, and form an impetus to further explore its potential in strategies for clinical malaria vaccine development. Immune activation induces long-term alterations of setpoints, impacting responses to subsequent unrelated stimuli. Here the authors show that volunteers vaccinated with BCG respond to controlled human malaria infection with increased clinical symptoms and an inverse correlation between immune activation markers and parasitemia.
Collapse
Affiliation(s)
- Jona Walk
- Department of Medical Microbiology, Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Radboud Center for Infectious Diseases, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - L Charlotte J de Bree
- Radboud Center for Infectious Diseases, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Department of Internal Medicine, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Research Center for Vitamins and Vaccines, Bandim Health Project, Statens Serum Institut, 2300, Copenhagen, Denmark.,Odense Patient Data Explorative Network, University of Southern Denmark/Odense University Hospital, 5000, Odense, Denmark
| | - Wouter Graumans
- Department of Medical Microbiology, Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Radboud Center for Infectious Diseases, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Rianne Stoter
- Department of Medical Microbiology, Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Radboud Center for Infectious Diseases, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Geert-Jan van Gemert
- Department of Medical Microbiology, Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Radboud Center for Infectious Diseases, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Marga van de Vegte-Bolmer
- Department of Medical Microbiology, Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Radboud Center for Infectious Diseases, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Karina Teelen
- Department of Medical Microbiology, Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Radboud Center for Infectious Diseases, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Cornelus C Hermsen
- Department of Medical Microbiology, Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Radboud Center for Infectious Diseases, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Rob J W Arts
- Radboud Center for Infectious Diseases, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Department of Internal Medicine, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Marije C Behet
- Department of Medical Microbiology, Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Radboud Center for Infectious Diseases, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Farid Keramati
- Department of Molecular Biology, Faculty of Science, Radboud university, 6525 GA, Nijmegen, The Netherlands
| | - Simone J C F M Moorlag
- Radboud Center for Infectious Diseases, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Department of Internal Medicine, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Annie S P Yang
- Department of Medical Microbiology, Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Radboud Center for Infectious Diseases, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Reinout van Crevel
- Radboud Center for Infectious Diseases, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Department of Internal Medicine, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Peter Aaby
- Research Center for Vitamins and Vaccines, Bandim Health Project, Statens Serum Institut, 2300, Copenhagen, Denmark
| | - Quirijn de Mast
- Radboud Center for Infectious Diseases, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Department of Internal Medicine, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - André J A M van der Ven
- Radboud Center for Infectious Diseases, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Department of Internal Medicine, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Christine Stabell Benn
- Research Center for Vitamins and Vaccines, Bandim Health Project, Statens Serum Institut, 2300, Copenhagen, Denmark.,Odense Patient Data Explorative Network, University of Southern Denmark/Odense University Hospital, 5000, Odense, Denmark
| | - Mihai G Netea
- Radboud Center for Infectious Diseases, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Department of Internal Medicine, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands.,Department for Genomics & Immunoregulation, Life and Medical Sciences Institute (LIMES), University of Bonn, 53115, Bonn, Germany
| | - Robert W Sauerwein
- Department of Medical Microbiology, Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands. .,Radboud Center for Infectious Diseases, Radboud University Medical Center PO Box 9101, 6500 HB, Nijmegen, The Netherlands.
| |
Collapse
|
34
|
Gowda DC, Wu X. Parasite Recognition and Signaling Mechanisms in Innate Immune Responses to Malaria. Front Immunol 2018; 9:3006. [PMID: 30619355 PMCID: PMC6305727 DOI: 10.3389/fimmu.2018.03006] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 12/05/2018] [Indexed: 12/20/2022] Open
Abstract
Malaria caused by the Plasmodium family of parasites, especially P.falciparum and P. vivax, is a major health problem in many countries in the tropical and subtropical regions of the world. The disease presents a wide array of systemic clinical conditions and several life-threatening organ pathologies, including the dreaded cerebral malaria. Like many other infectious diseases, malaria is an inflammatory response-driven disease, and positive outcomes to infection depend on finely tuned regulation of immune responses that efficiently clear parasites and allow protective immunity to develop. Immune responses initiated by the innate immune system in response to parasites play key roles both in protective immunity development and pathogenesis. Initial pro-inflammatory responses are essential for clearing infection by promoting appropriate cell-mediated and humoral immunity. However, elevated and prolonged pro-inflammatory responses owing to inappropriate cellular programming contribute to disease conditions. A comprehensive knowledge of the molecular and cellular mechanisms that initiate immune responses and how these responses contribute to protective immunity development or pathogenesis is important for developing effective therapeutics and/or a vaccine. Historically, in efforts to develop a vaccine, immunity to malaria was extensively studied in the context of identifying protective humoral responses, targeting proteins involved in parasite invasion or clearance. The innate immune response was thought to be non-specific. However, during the past two decades, there has been a significant progress in understanding the molecular and cellular mechanisms of host-parasite interactions and the associated signaling in immune responses to malaria. Malaria infection occurs at two stages, initially in the liver through the bite of a mosquito, carrying sporozoites, and subsequently, in the blood through the invasion of red blood cells by merozoites released from the infected hepatocytes. Soon after infection, both the liver and blood stage parasites are sensed by various receptors of the host innate immune system resulting in the activation of signaling pathways and production of cytokines and chemokines. These immune responses play crucial roles in clearing parasites and regulating adaptive immunity. Here, we summarize the knowledge on molecular mechanisms that underlie the innate immune responses to malaria infection.
Collapse
Affiliation(s)
- D Channe Gowda
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Xianzhu Wu
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University College of Medicine, Hershey, PA, United States
| |
Collapse
|
35
|
Cross-laboratory evaluation of multiplex bead assays including independent common reference standards for immunological monitoring of observational and interventional human studies. PLoS One 2018; 13:e0201205. [PMID: 30180167 PMCID: PMC6122788 DOI: 10.1371/journal.pone.0201205] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 07/09/2018] [Indexed: 11/19/2022] Open
Abstract
Background Multiplex assays are increasingly applied to analyze multicomponent signatures of human immune responses, including the dynamics of cytokine and chemokine production, in observational as well as interventional studies following treatment or vaccination. However, relatively limited information is available on the performance of the different available multiplex kits, and comparative evaluations addressing this important issue are lacking. Study design To fill this knowledge gap we performed a technical comparison of multiplex bead assays from 4 manufacturers, each represented by 3 different lots, and with the assays performed by 3 different laboratories. To cross compare kits directly, spiked samples, biological samples and a newly made reference standard were included in all assays. Analyses were performed on 324 standard curves to allow for evaluation of the quality of the standard curves and the subsequent interpretation of biological specimens. Results Manufacturer was the factor which contributed most to the observed variation whereas variation in lots, laboratory or type of detection reagent contributed minimally. Inclusion of a common reference standard allowed us to overcome observed differences in cytokine and chemokine levels between manufacturers. Conclusions We strongly recommend using multiplex assays from the same manufacturer within a single study and across studies that are likely to compare results in a quantitative manner. Incorporation of common reference standards, and application of the same analysis method in assays can overcome many analytical biases and thus could bridge comparison of independent immune profiling (e.g. vaccine immunogenicity) studies. With these recommendations taken into account, the multiplex bead assays performed as described here are useful tools in capturing complex human immune-signatures in observational and interventional studies.
Collapse
|
36
|
Abel A, Steeg C, Aminkiah F, Addai-Mensah O, Addo M, Gagliani N, Casar C, Yar DD, Owusu-Dabo E, Jacobs T, Mackroth MS. Differential expression pattern of co-inhibitory molecules on CD4 + T cells in uncomplicated versus complicated malaria. Sci Rep 2018; 8:4789. [PMID: 29555909 PMCID: PMC5859076 DOI: 10.1038/s41598-018-22659-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 02/21/2018] [Indexed: 01/09/2023] Open
Abstract
The immune response of malaria patients is a main factor influencing the clinical severity of malaria. A tight regulation of the CD4+ T cell response or the induction of tolerance have been proposed to contribute to protection from severe or clinical disease. We therefore compared the CD4+ T cell phenotypes of Ghanaian children with complicated malaria, uncomplicated malaria, asymptomatic Plasmodium falciparum (Pf) infection or no infection. Using flow cytometric analysis and automated multivariate clustering, we characterized the expression of the co-inhibitory molecules CTLA-4, PD-1, Tim-3, and LAG-3 and other molecules implicated in regulatory function on CD4+ T cells. Children with complicated malaria had higher frequencies of CTLA-4+ or PD-1+ CD4+ T cells than children with uncomplicated malaria. Conversely, children with uncomplicated malaria showed a higher proportion of CD4+ T cells expressing CD39 and Granzyme B, compared to children with complicated malaria. In contrast, asymptomatically infected children expressed only low levels of co-inhibitory molecules. Thus, different CD4+ T cell phenotypes are associated with complicated versus uncomplicated malaria, suggesting a two-sided role of CD4+ T cells in malaria pathogenesis and protection. Deciphering the signals that shape the CD4+ T cell phenotype in malaria will be important for new treatment and immunization strategies.
Collapse
Affiliation(s)
- Annemieke Abel
- Protozoa Immunology, Bernhard Nocht Institute for Tropical Medicine, 20359, Hamburg, Germany
| | - Christiane Steeg
- Protozoa Immunology, Bernhard Nocht Institute for Tropical Medicine, 20359, Hamburg, Germany
| | - Francis Aminkiah
- Kumasi Centre for Collaborative Research in Tropical Medicine, Kumasi, Ghana
| | - Otchere Addai-Mensah
- Department of Medical Laboratory Technology, Faculty of Allied Health Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Marylyn Addo
- I. Medical Department, Division of Tropical Medicine and Infectious Diseases, University Medical Centre Hamburg Eppendorf, 20246, Hamburg, Germany
- German Center for Infection Research (DZIF), partner site Hamburg-Lübeck-Borstel-Riems, Germany
| | - Nicola Gagliani
- I. Medical Department, Division of Tropical Medicine and Infectious Diseases, University Medical Centre Hamburg Eppendorf, 20246, Hamburg, Germany
| | - Christian Casar
- I. Medical Department, Division of Tropical Medicine and Infectious Diseases, University Medical Centre Hamburg Eppendorf, 20246, Hamburg, Germany
| | - Denis Dekugmen Yar
- Kumasi Centre for Collaborative Research in Tropical Medicine, Kumasi, Ghana
| | - Ellis Owusu-Dabo
- Kumasi Centre for Collaborative Research in Tropical Medicine, Kumasi, Ghana
| | - Thomas Jacobs
- Protozoa Immunology, Bernhard Nocht Institute for Tropical Medicine, 20359, Hamburg, Germany
| | - Maria Sophia Mackroth
- I. Medical Department, Division of Tropical Medicine and Infectious Diseases, University Medical Centre Hamburg Eppendorf, 20246, Hamburg, Germany.
| |
Collapse
|
37
|
Kalantari P. The Emerging Role of Pattern Recognition Receptors in the Pathogenesis of Malaria. Vaccines (Basel) 2018; 6:vaccines6010013. [PMID: 29495555 PMCID: PMC5874654 DOI: 10.3390/vaccines6010013] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 02/19/2018] [Accepted: 02/22/2018] [Indexed: 11/16/2022] Open
Abstract
Despite a global effort to develop an effective vaccine, malaria is still a significant health problem. Much of the pathology of malaria is immune mediated. This suggests that host immune responses have to be finely regulated. The innate immune system initiates and sets the threshold of the acquired immune response and determines the outcome of the disease. Yet, our knowledge of the regulation of innate immune responses during malaria is limited. Theoretically, inadequate activation of the innate immune system could result in unrestrained parasite growth. Conversely, hyperactivation of the innate immune system, is likely to cause excessive production of proinflammatory cytokines and severe pathology. Toll-like receptors (TLRs) have emerged as essential receptors which detect signature molecules and shape the complex host response during malaria infection. This review will highlight the mechanisms by which Plasmodium components are recognized by innate immune receptors with particular emphasis on TLRs. A thorough understanding of the complex roles of TLRs in malaria may allow the delineation of pathological versus protective host responses and enhance the efficacy of anti-malarial treatments and vaccines.
Collapse
Affiliation(s)
- Parisa Kalantari
- Department of Immunology, Tufts University School of Medicine, Boston, MA 02111, USA.
| |
Collapse
|
38
|
Ng SS, Souza-Fonseca-Guimaraes F, Rivera FDL, Amante FH, Kumar R, Gao Y, Sheel M, Beattie L, Montes de Oca M, Guillerey C, Edwards CL, Faleiro RJ, Frame T, Bunn PT, Vivier E, Godfrey DI, Pellicci DG, Lopez JA, Andrews KT, Huntington ND, Smyth MJ, McCarthy J, Engwerda CR. Rapid loss of group 1 innate lymphoid cells during blood stage Plasmodium infection. Clin Transl Immunology 2018; 7:e1003. [PMID: 29484181 PMCID: PMC5822408 DOI: 10.1002/cti2.1003] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 11/09/2017] [Accepted: 12/05/2017] [Indexed: 12/20/2022] Open
Abstract
Objectives Innate lymphoid cells (ILCs) share many characteristics with CD4+ T cells, and group 1 ILCs share a requirement for T‐bet and the ability to produce IFNγ with T helper 1 (Th1) cells. Given this similarity, and the importance of Th1 cells for protection against intracellular protozoan parasites, we aimed to characterise the role of group 1 ILCs during Plasmodium infection. Methods We quantified group 1 ILCs in peripheral blood collected from subjects infected with with Plasmodium falciparum 3D7 as part of a controlled human malaria infection study, and in the liver and spleens of PcAS‐infected mice. We used genetically‐modified mouse models, as well as cell‐depletion methods in mice to characterise the role of group 1 ILCs during PcAS infection. Results In a controlled human malaria infection study, we found that the frequencies of circulating ILC1s and NK cells decreased as infection progressed but recovered after volunteers were treated with antiparasitic drug. A similar observation was made for liver and splenic ILC1s in P. chabaudi chabaudi AS (PcAS)‐infected mice. The decrease in mouse liver ILC1 frequencies was associated with increased apoptosis. We also identified a population of cells within the liver and spleen that expressed both ILC1 and NK cell markers, indicative of plasticity between these two cell lineages. Studies using genetic and cell‐depletion approaches indicated that group 1 ILCs have a limited role in antiparasitic immunity during PcAS infection in mice. Discussion Our results are consistent with a previous study indicating a limited role for natural killer (NK) cells during Plasmodium chabaudi infection in mice. Additionally, a recent study reported the redundancy of ILCs in humans with competent B and T cells. Nonetheless, our results do not rule out a role for group 1 ILCs in human malaria in endemic settings given that blood stage infection was initiated intravenously in our experimental models, and thus bypassed the liver stage of infection, which may influence the immune response during the blood stage. Conclusion Our results show that ILC1s are lost early during mouse and human malaria, and this observation may help to explain the limited role for these cells in controlling blood stage infection.
Collapse
Affiliation(s)
- Susanna S Ng
- Immunology and Infection Laboratory QIMR Berghofer Medical Research Institute Herston QLD Australia.,School of Natural Sciences Griffith University Nathan QLD Australia
| | - Fernando Souza-Fonseca-Guimaraes
- Faculty of Medicine, Dentistry and Health Sciences University of Melbourne Melbourne VIC Australia.,Molecular Immunology Division The Walter and Eliza Hall Institute of Medical Research Parkville VIC Australia
| | | | - Fiona H Amante
- Immunology and Infection Laboratory QIMR Berghofer Medical Research Institute Herston QLD Australia
| | - Rajiv Kumar
- Immunology and Infection Laboratory QIMR Berghofer Medical Research Institute Herston QLD Australia.,Department of Biochemistry Banaras Hindu University Varanasi India
| | - Yulong Gao
- Immunology in Cancer and Infection QIMR Berghofer Medical Research Institute Herston QLD Australia.,School of Medicine University of Queensland Herston QLD Australia
| | - Meru Sheel
- National Centre for Immunisation Research and Surveillance Westmead NSW Australia
| | - Lynette Beattie
- Immunology and Infection Laboratory QIMR Berghofer Medical Research Institute Herston QLD Australia
| | - Marcela Montes de Oca
- Immunology and Infection Laboratory QIMR Berghofer Medical Research Institute Herston QLD Australia
| | - Camille Guillerey
- Immunology in Cancer and Infection QIMR Berghofer Medical Research Institute Herston QLD Australia
| | - Chelsea L Edwards
- Immunology and Infection Laboratory QIMR Berghofer Medical Research Institute Herston QLD Australia.,School of Medicine University of Queensland Herston QLD Australia
| | - Rebecca J Faleiro
- Immunology and Infection Laboratory QIMR Berghofer Medical Research Institute Herston QLD Australia
| | - Teija Frame
- Immunology and Infection Laboratory QIMR Berghofer Medical Research Institute Herston QLD Australia
| | - Patrick T Bunn
- Immunology and Infection Laboratory QIMR Berghofer Medical Research Institute Herston QLD Australia
| | - Eric Vivier
- Aix Marseille Université, CNRS, INSERM, CIML Marseille France.,Service d'Immunologie APHM, Hôpital de la Conception Marseille France
| | - Dale I Godfrey
- Department of Microbiology and Immunology Peter Doherty Institute for Infection and Immunity University of Melbourne Melbourne VIC Australia.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging University of Melbourne Melbourne VIC Australia
| | - Daniel G Pellicci
- Department of Microbiology and Immunology Peter Doherty Institute for Infection and Immunity University of Melbourne Melbourne VIC Australia.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging University of Melbourne Melbourne VIC Australia
| | | | | | - Nicholas D Huntington
- Molecular Immunology Division The Walter and Eliza Hall Institute of Medical Research Parkville VIC Australia.,Department of Medical Biology The University of Melbourne Melbourne VIC Australia
| | - Mark J Smyth
- Immunology in Cancer and Infection QIMR Berghofer Medical Research Institute Herston QLD Australia
| | - James McCarthy
- Clinical Tropical Medicine QIMR Berghofer Medical Research Institute Herston QLD Australia
| | - Christian R Engwerda
- Immunology and Infection Laboratory QIMR Berghofer Medical Research Institute Herston QLD Australia
| |
Collapse
|
39
|
Farrington L, Vance H, Rek J, Prahl M, Jagannathan P, Katureebe A, Arinaitwe E, Kamya MR, Dorsey G, Feeney ME. Both inflammatory and regulatory cytokine responses to malaria are blunted with increasing age in highly exposed children. Malar J 2017; 16:499. [PMID: 29284469 PMCID: PMC5747142 DOI: 10.1186/s12936-017-2148-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 12/19/2017] [Indexed: 11/30/2022] Open
Abstract
Background Young children are at greatest risk for malaria-associated morbidity and mortality. The immune response of young children differs in fundamental ways from that of adults, and these differences likely contribute to the increased susceptibility of children to severe malaria and to their delayed development of immunity. Elevated levels of pro-inflammatory cytokines and chemokines in the peripheral blood during acute infection contribute to the control of parasitaemia, but are also responsible for much of the immunopathology seen during symptomatic disease. Clinical immunity to malaria may depend upon the ability to regulate these pro-inflammatory responses, possibly through mechanisms of immunologic tolerance. In order to explore the effect of age on the immune response to malaria and the development of clinical immunity, cytokines and chemokines were measured in the plasma of children at day 0 of an acute malaria episode and during convalescence. Results Younger children presenting with acute malaria exhibited much higher levels of TNF, IL2, and IL6, as well as increased Th1 associated chemokines IP10, MIG, and MCP1, compared to older children with acute malaria. Additionally, the regulatory cytokines IL10 and TNFRI were dramatically elevated in younger children compared to older children during acute infection, indicating that regulatory as well as pro-inflammatory cytokine responses are dampened in later childhood. Conclusions Together these data suggest that there is a profound blunting of the cytokine and chemokine response to malaria among older children residing in endemic settings, which may be due to repeated malaria exposure, intrinsic age-based differences in the immune response, or both.
Collapse
Affiliation(s)
- Lila Farrington
- Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Hilary Vance
- Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - John Rek
- Infectious Diseases Research Collaboration, Kampala, Uganda
| | - Mary Prahl
- Department of Pediatrics, University of California San Francisco, San Francisco, CA, USA
| | | | | | | | - Moses R Kamya
- Infectious Diseases Research Collaboration, Kampala, Uganda.,Makerere University College of Health Sciences, Kampala, Uganda
| | - Grant Dorsey
- Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Margaret E Feeney
- Department of Medicine, University of California San Francisco, San Francisco, CA, USA. .,Department of Pediatrics, University of California San Francisco, San Francisco, CA, USA.
| |
Collapse
|
40
|
Plasmodium falciparum PfEMP1 Modulates Monocyte/Macrophage Transcription Factor Activation and Cytokine and Chemokine Responses. Infect Immun 2017; 86:IAI.00447-17. [PMID: 29038124 PMCID: PMC5736827 DOI: 10.1128/iai.00447-17] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 10/03/2017] [Indexed: 12/11/2022] Open
Abstract
Immunity to Plasmodium falciparum malaria is slow to develop, and it is often asserted that malaria suppresses host immunity, although this is poorly understood and the molecular basis for such activity remains unknown. P. falciparum erythrocyte membrane protein 1 (PfEMP1) is a virulence factor that plays a key role in parasite-host interactions. We investigated the immunosuppressive effect of PfEMP1 on monocytes/macrophages, which are central to the antiparasitic innate response. RAW macrophages and human primary monocytes were stimulated with wild-type 3D7 or CS2 parasites or transgenic PfEMP1-null parasites. To study the immunomodulatory effect of PfEMP1, transcription factor activation and cytokine and chemokine responses were measured. The level of activation of NF-κB was significantly lower in macrophages stimulated with parasites that express PfEMP1 at the red blood cell surface membrane than in macrophages stimulated with PfEMP1-null parasites. Modulation of additional transcription factors, including CREB, also occurred, resulting in reduced immune gene expression and decreased tumor necrosis factor (TNF) and interleukin-10 (IL-10) release. Similarly, human monocytes released less IL-1β, IL-6, IL-10, monocyte chemoattractant protein 1 (MCP-1), macrophage inflammatory protein 1α (MIP-1α), MIP-1β, and TNF specifically in response to VAR2CSA PfEMP1-containing parasites than in response to PfEMP1-null parasites, suggesting that this immune regulation by PfEMP1 is important in naturally occurring infections. These results indicate that PfEMP1 is an immunomodulatory molecule that affects the activation of a range of transcription factors, dampening cytokine and chemokine responses. Therefore, these findings describe a potential molecular basis for immune suppression by P. falciparum.
Collapse
|
41
|
Abstract
Controlled human malaria infection (CHMI) entails deliberate infection with malaria parasites either by mosquito bite or by direct injection of sporozoites or parasitized erythrocytes. When required, the resulting blood-stage infection is curtailed by the administration of antimalarial drugs. Inducing a malaria infection via inoculation with infected blood was first used as a treatment (malariotherapy) for neurosyphilis in Europe and the United States in the early 1900s. More recently, CHMI has been applied to the fields of malaria vaccine and drug development, where it is used to evaluate products in well-controlled early-phase proof-of-concept clinical studies, thus facilitating progression of only the most promising candidates for further evaluation in areas where malaria is endemic. Controlled infections have also been used to immunize against malaria infection. Historically, CHMI studies have been restricted by the need for access to insectaries housing infected mosquitoes or suitable malaria-infected individuals. Evaluation of vaccine and drug candidates has been constrained in these studies by the availability of a limited number of Plasmodium falciparum isolates. Recent advances have included cryopreservation of sporozoites, the manufacture of well-characterized and genetically distinct cultured malaria cell banks for blood-stage infection, and the availability of Plasmodium vivax-specific reagents. These advances will help to accelerate malaria vaccine and drug development by making the reagents for CHMI more widely accessible and also enabling a more rigorous evaluation with multiple parasite strains and species. Here we discuss the different applications of CHMI, recent advances in the use of CHMI, and ongoing challenges for consideration.
Collapse
|
42
|
Boström S, Schmiegelow C, Abu Abed U, Minja DTR, Lusingu J, Brinkmann V, Honkpehedji YJ, Loembe MM, Adegnika AA, Mordmüller B, Troye-Blomberg M, Amulic B. Neutrophil alterations in pregnancy-associated malaria and induction of neutrophil chemotaxis by Plasmodium falciparum. Parasite Immunol 2017; 39. [PMID: 28380252 DOI: 10.1111/pim.12433] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 03/31/2017] [Indexed: 11/27/2022]
Abstract
Pregnancy-associated malaria (PAM) is a severe form of the disease caused by sequestration of Plasmodium falciparum-infected red blood cells (iRBCs) in the developing placenta. Pathogenesis of PAM is partially based on immunopathology, with frequent monocyte infiltration into the placenta. Neutrophils are abundant blood cells that are essential for immune defence but may also cause inflammatory pathology. Their role in PAM remains unclear. We analysed neutrophil alterations in the context of PAM to better understand their contribution to disease development. Pregnant women exposed to Plasmodium falciparum had decreased numbers of circulating neutrophils. Placental-like BeWo cells stimulated with malaria parasites produced the neutrophil chemoattractant IL-8 and recruited neutrophils in a trans-well assay. Finally, immunostaining of a PAM placenta confirmed neutrophil accumulation in the intervillous space. Our data indicate neutrophils may play a role in placental malaria and should be more closely examined as an etiological agent in the pathophysiology of disease.
Collapse
Affiliation(s)
- S Boström
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - C Schmiegelow
- Department of Immunology and Microbiology, Centre for Medical Parasitology, University of Copenhagen, Copenhagen, Denmark
| | - U Abu Abed
- Department of Cellular Microbiology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - D T R Minja
- National Institute for Medical Research, Tanga, Tanzania
| | - J Lusingu
- National Institute for Medical Research, Tanga, Tanzania
| | - V Brinkmann
- Microscopy Core Facility, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Y J Honkpehedji
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon.,Institute of Tropical Medicine, University of Tübingen and German Center for Infection Research, partner site Tübingen, Tübingen, Germany
| | - M M Loembe
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon.,Institute of Tropical Medicine, University of Tübingen and German Center for Infection Research, partner site Tübingen, Tübingen, Germany.,Département de Bactério-Virologie, Université des Sciences de la Santé, Libreville, Gabon
| | - A A Adegnika
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon.,Institute of Tropical Medicine, University of Tübingen and German Center for Infection Research, partner site Tübingen, Tübingen, Germany
| | - B Mordmüller
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon.,Institute of Tropical Medicine, University of Tübingen and German Center for Infection Research, partner site Tübingen, Tübingen, Germany
| | - M Troye-Blomberg
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - B Amulic
- Department of Cellular Microbiology, Max Planck Institute for Infection Biology, Berlin, Germany
| |
Collapse
|
43
|
Burel JG, Apte SH, Groves PL, Boyle MJ, Langer C, Beeson JG, McCarthy JS, Doolan DL. Dichotomous miR expression and immune responses following primary blood-stage malaria. JCI Insight 2017; 2:93434. [PMID: 28768914 DOI: 10.1172/jci.insight.93434] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 06/29/2017] [Indexed: 01/12/2023] Open
Abstract
Clinical responses to infection or vaccination and the development of effective immunity are characterized in humans by a marked interindividual variability. To gain an insight into the factors affecting this variability, we used a controlled human infection system to study early immune events following primary infection of healthy human volunteers with blood-stage Plasmodium falciparum malaria. By day 4 of infection, a dichotomous pattern of high or low expression of a defined set of microRNAs (miRs) emerged in volunteers that correlated with variation in parasite growth rate. Moreover, high-miR responders had higher numbers of activated CD4+ T cells, and developed significantly enhanced antimalarial antibody responses. Notably, a set of 17 miRs was identified in the whole blood of low-miR responders prior to infection that differentiated them from high-miR responders. These data implicate preexisting host factors as major determinants in the ability to effectively respond to primary malaria infection.
Collapse
Affiliation(s)
- Julie G Burel
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia.,The University of Queensland, Brisbane, Queensland, Australia
| | - Simon H Apte
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Penny L Groves
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Michelle J Boyle
- Menzies School of Health Research, Darwin, Northern Territory, Australia.,Burnet Institute for Medical Research and Public Health, Melbourne, Victoria, Australia
| | - Christine Langer
- Burnet Institute for Medical Research and Public Health, Melbourne, Victoria, Australia
| | - James G Beeson
- Burnet Institute for Medical Research and Public Health, Melbourne, Victoria, Australia.,Department of Microbiology, Monash University, Victoria, Australia
| | - James S McCarthy
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia.,The University of Queensland, Brisbane, Queensland, Australia
| | - Denise L Doolan
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia.,Centre for Biosecurity and Tropical Infectious Diseases, Australian Institute of Tropical Health and Medicine, James Cook University, Cairns, Queensland, Australia
| |
Collapse
|
44
|
Mpina M, Maurice NJ, Yajima M, Slichter CK, Miller HW, Dutta M, McElrath MJ, Stuart KD, De Rosa SC, McNevin JP, Linsley PS, Abdulla S, Tanner M, Hoffman SL, Gottardo R, Daubenberger CA, Prlic M. Controlled Human Malaria Infection Leads to Long-Lasting Changes in Innate and Innate-like Lymphocyte Populations. THE JOURNAL OF IMMUNOLOGY 2017; 199:107-118. [PMID: 28576979 DOI: 10.4049/jimmunol.1601989] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 05/01/2017] [Indexed: 11/19/2022]
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.
Collapse
Affiliation(s)
- Maxmillian Mpina
- Clinical Immunology Unit, Department of Medical Parasitology and Infection Biology, Swiss Tropical and Public Health Institute, 4002 Basel, Switzerland.,University of Basel, Basel, 4001 Switzerland
| | - Nicholas J Maurice
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Masanao Yajima
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109.,Department of Mathematics and Statistics, Boston University, Boston, MA 02215
| | - Chloe K Slichter
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109.,Department of Global Health, University of Washington, Seattle, WA 98195
| | - Hannah W Miller
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Mukta Dutta
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - M Juliana McElrath
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109.,Department of Global Health, University of Washington, Seattle, WA 98195
| | | | - Stephen C De Rosa
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - John P McNevin
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | | | - Salim Abdulla
- Ifakara Health Institute, Bagamoyo Research and Training Centre, Bagamoyo, Tanzania; and
| | - Marcel Tanner
- Clinical Immunology Unit, Department of Medical Parasitology and Infection Biology, Swiss Tropical and Public Health Institute, 4002 Basel, Switzerland.,University of Basel, Basel, 4001 Switzerland
| | | | - Raphael Gottardo
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Claudia A Daubenberger
- Clinical Immunology Unit, Department of Medical Parasitology and Infection Biology, Swiss Tropical and Public Health Institute, 4002 Basel, Switzerland; .,University of Basel, Basel, 4001 Switzerland
| | - Martin Prlic
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109; .,Department of Global Health, University of Washington, Seattle, WA 98195
| |
Collapse
|
45
|
Spencer AJ, Longley RJ, Gola A, Ulaszewska M, Lambe T, Hill AVS. The Threshold of Protection from Liver-Stage Malaria Relies on a Fine Balance between the Number of Infected Hepatocytes and Effector CD8 + T Cells Present in the Liver. THE JOURNAL OF IMMUNOLOGY 2017; 198:2006-2016. [PMID: 28087668 PMCID: PMC5318841 DOI: 10.4049/jimmunol.1601209] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 12/16/2016] [Indexed: 12/20/2022]
Abstract
Since the demonstration of sterile protection afforded by injection of irradiated sporozoites, CD8+ T cells have been shown to play a significant role in protection from liver-stage malaria. This is, however, dependent on the presence of an extremely high number of circulating effector cells, thought to be necessary to scan, locate, and kill infected hepatocytes in the short time that parasites are present in the liver. We used an adoptive transfer model to elucidate the kinetics of the effector CD8+ T cell response in the liver following Plasmodium berghei sporozoite challenge. Although effector CD8+ T cells require <24 h to find, locate, and kill infected hepatocytes, active migration of Ag-specific CD8+ T cells into the liver was not observed during the 2-d liver stage of infection, as divided cells were only detected from day 3 postchallenge. However, the percentage of donor cells recruited into division was shown to indicate the level of Ag presentation from infected hepatocytes. By titrating the number of transferred Ag-specific effector CD8+ T cells and sporozoites, we demonstrate that achieving protection toward liver-stage malaria is reliant on CD8+ T cells being able to locate infected hepatocytes, resulting in a protection threshold dependent on a fine balance between the number of infected hepatocytes and CD8+ T cells present in the liver. With such a fine balance determining protection, achieving a high number of CD8+ T cells will be critical to the success of a cell-mediated vaccine against liver-stage malaria.
Collapse
Affiliation(s)
| | - Rhea J Longley
- The Jenner Institute, University of Oxford, Oxford OX3 7DQ, United Kingdom
| | - Anita Gola
- The Jenner Institute, University of Oxford, Oxford OX3 7DQ, United Kingdom
| | - Marta Ulaszewska
- The Jenner Institute, University of Oxford, Oxford OX3 7DQ, United Kingdom
| | - Teresa Lambe
- The Jenner Institute, University of Oxford, Oxford OX3 7DQ, United Kingdom
| | - Adrian V S Hill
- The Jenner Institute, University of Oxford, Oxford OX3 7DQ, United Kingdom
| |
Collapse
|
46
|
Spaulding E, Fooksman D, Moore JM, Saidi A, Feintuch CM, Reizis B, Chorro L, Daily J, Lauvau G. STING-Licensed Macrophages Prime Type I IFN Production by Plasmacytoid Dendritic Cells in the Bone Marrow during Severe Plasmodium yoelii Malaria. PLoS Pathog 2016; 12:e1005975. [PMID: 27792766 PMCID: PMC5085251 DOI: 10.1371/journal.ppat.1005975] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 10/03/2016] [Indexed: 02/07/2023] Open
Abstract
Malaria remains a global health burden causing significant morbidity, yet the mechanisms underlying disease outcomes and protection are poorly understood. Herein, we analyzed the peripheral blood of a unique cohort of Malawian children with severe malaria, and performed a comprehensive overview of blood leukocytes and inflammatory mediators present in these patients. We reveal robust immune cell activation, notably of CD14+ inflammatory monocytes, NK cells and plasmacytoid dendritic cells (pDCs) that is associated with very high inflammation. Using the Plasmodium yoelii 17X YM surrogate mouse model of lethal malaria, we report a comparable pattern of immune cell activation and inflammation and found that type I IFN represents a key checkpoint for disease outcomes. Compared to wild type mice, mice lacking the type I interferon (IFN) receptor exhibited a significant decrease in immune cell activation and inflammatory response, ultimately surviving the infection. We demonstrate that pDCs were the major producers of systemic type I IFN in the bone marrow and the blood of infected mice, via TLR7/MyD88-mediated recognition of Plasmodium parasites. This robust type I IFN production required priming of pDCs by CD169+ macrophages undergoing activation upon STING-mediated sensing of parasites in the bone marrow. pDCs and macrophages displayed prolonged interactions in this compartment in infected mice as visualized by intravital microscopy. Altogether our findings describe a novel mechanism of pDC activation in vivo and precise stepwise cell/cell interactions taking place during severe malaria that contribute to immune cell activation and inflammation, and subsequent disease outcomes. The Plasmodium parasite is the number one killer among human parasitic diseases worldwide. Protection is associated with length of exposure for people living in endemic areas, with severe disease primarily affecting young children. Inflammation is a key component in the pathophysiology in malaria, and disease severity has been linked to the degree of activation of the immune system. However, the underlying mechanisms of protection and disease outcomes remain poorly understood. We provide a comprehensive analysis of peripheral blood immune cells obtained from a cohort of children with severe malaria. Our results show heightened inflammation and immune cell activation, in particular for monocytes, natural killer cells, and plasmacytoid dendritic cells (pDCs). We have also utilized a mouse model of lethal malaria that recapitulates many features identified in this cohort of severe malaria patients to examine drivers of immune cell activation and inflammation. Our studies provide evidence that type I interferon (IFN) acts as an early switch in inducing a potent inflammatory response in the infected host. Type I IFN production is massively produced in the bone marrow and the blood of infected mice by plasmacytoid dendritic cells (pDCs), a subset of DCs. We also demonstrate that resident macrophages in the bone marrow, control type I IFN production by the pDCs. We define how both myeloid cells “sense” the parasite to initiate the host immune response and report a previously uncharacterized physical interaction between pDCs and macrophages in the bone marrow as visualized by intravital microscopy in vivo. Our results define cellular processes underlying the marked inflammation of severe malaria and could open novel therapeutic opportunities to improve outcomes in this important human infectious disease.
Collapse
Affiliation(s)
- Emily Spaulding
- Albert Einstein College of Medicine, Department of Microbiology and Immunology, Bronx, NY, United States Of America
| | - David Fooksman
- Albert Einstein College of Medicine, Department of Microbiology and Immunology, Bronx, NY, United States Of America
- Albert Einstein College of Medicine, Department of Pathology, Bronx, NY, United States Of America
| | - Jamie M. Moore
- Albert Einstein College of Medicine, Department of Microbiology and Immunology, Bronx, NY, United States Of America
| | - Alex Saidi
- University of Malawi College of Medicine, Blantyre Malaria Project, Blantyre, Malawi
| | - Catherine M. Feintuch
- Albert Einstein College of Medicine, Department of Microbiology and Immunology, Bronx, NY, United States Of America
- Albert Einstein College of Medicine, Department of Medicine, Division of Infectious Diseases, Bronx, NY, United States Of America
| | - Boris Reizis
- New York University Medical Center, Department of Pathology and Department of Medicine, New York, NY, United States Of America
| | - Laurent Chorro
- Albert Einstein College of Medicine, Department of Microbiology and Immunology, Bronx, NY, United States Of America
| | - Johanna Daily
- Albert Einstein College of Medicine, Department of Microbiology and Immunology, Bronx, NY, United States Of America
- Albert Einstein College of Medicine, Department of Medicine, Division of Infectious Diseases, Bronx, NY, United States Of America
| | - Grégoire Lauvau
- Albert Einstein College of Medicine, Department of Microbiology and Immunology, Bronx, NY, United States Of America
- * E-mail:
| |
Collapse
|
47
|
Immune activation and induction of memory: lessons learned from controlled human malaria infection with Plasmodium falciparum. Parasitology 2016; 143:224-35. [PMID: 26864135 DOI: 10.1017/s0031182015000761] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Controlled human malaria infections (CHMIs) are a powerful tool to assess the efficacy of drugs and/or vaccine candidates, but also to study anti-malarial immune responses at well-defined time points after infection. In this review, we discuss the insights that CHMI trials have provided into early immune activation and regulation during acute infection, and the capacity to induce and maintain immunological memory. Importantly, these studies show that a single infection is sufficient to induce long-lasting parasite-specific T- and B-cell memory responses, and suggest that blood-stage induced regulatory responses can limit inflammation both in ongoing and potentially future infections. As future perspective of investigation in CHMIs, we discuss the role of innate cell subsets, the interplay between innate and adaptive immune activation and the potential modulation of these responses after natural pre-exposure.
Collapse
|
48
|
Chemically Attenuated Blood-Stage Plasmodium yoelii Parasites Induce Long-Lived and Strain-Transcending Protection. Infect Immun 2016; 84:2274-2288. [PMID: 27245410 PMCID: PMC4962623 DOI: 10.1128/iai.00157-16] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Accepted: 05/20/2016] [Indexed: 11/30/2022] Open
Abstract
The development of a vaccine is essential for the elimination of malaria. However, despite many years of effort, a successful vaccine has not been achieved. Most subunit vaccine candidates tested in clinical trials have provided limited efficacy, and thus attenuated whole-parasite vaccines are now receiving close scrutiny. Here, we test chemically attenuated Plasmodium yoelii 17X and demonstrate significant protection following homologous and heterologous blood-stage challenge. Protection against blood-stage infection persisted for at least 9 months. Activation of both CD4+ and CD8+ T cells was shown after vaccination; however, in vivo studies demonstrated a pivotal role for both CD4+ T cells and B cells since the absence of either cell type led to loss of vaccine-induced protection. In spite of significant activation of circulating CD8+ T cells, liver-stage immunity was not evident. Neither did vaccine-induced CD8+ T cells contribute to blood-stage protection; rather, these cells contributed to pathogenesis, since all vaccinated mice depleted of both CD4+ and CD8+ T cells survived a challenge infection. This study provides critical insight into whole-parasite vaccine-induced immunity and strong support for testing whole-parasite vaccines in humans.
Collapse
|
49
|
Furini AAC, Capobianco MP, Storti-Melo LM, Cunha MG, Cassiano GC, Machado RLD. Cytokine gene polymorphisms are not associated with anti-PvDBP, anti-PvAMA-1 or anti-PvMSP-119 IgG antibody levels in a malaria-endemic area of the Brazilian Amazon. Malar J 2016; 15:374. [PMID: 27435973 PMCID: PMC4952271 DOI: 10.1186/s12936-016-1414-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 07/04/2016] [Indexed: 11/18/2022] Open
Abstract
Background The immune response against Plasmodium vivax immunogenic epitopes is regulated by pro- and anti-inflammatory cytokines that determine antibody levels and class switching. Cytokine gene polymorphisms may be responsible for changes in the humoral immune response against malaria. The aim of this study was to evaluate whether polymorphisms in the TNFA, IFNG and IL10 genes would alter the levels of anti-PvAMA1, PvDBP and -PvMSP-119 IgG antibodies in patients with vivax malaria. Methods Samples from 90 vivax malaria-infected and 51 uninfected subjects from an endemic area of the Brazilian Amazon were genotyped using polymerase chain reaction-restriction fragment length polymorphism (PCR–RFLP) to identify polymorphisms of the genes TNFA (−1031T > C, −308G > A, −238G > A), IFNG (+874T > A) and IL10 (−819C > T, −592C > A). The levels of total IgG against PvAMA1, PvDBP and PvMSP-119 were determined using an enzyme-linked immunosorbent assay (ELISA). Associations between the polymorphisms and the antibody response were assessed by means of logistic regression models. Results No significant differences were found in the levels of IgG antibodies against the PvAMA-1, PvDBP or PvMSP-119 proteins in relation to the studied polymorphisms. Conclusions Although no associations were found among the evaluated genotypes and alleles and anti-merozoite IgG class P. vivax antibody levels, this study helps elucidate the immunogenic profile involved in the humoral immune response in malaria. Electronic supplementary material The online version of this article (doi:10.1186/s12936-016-1414-3) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Adriana A C Furini
- Department of Dermatology, Infectious and Parasitic Diseases, São José do Rio Preto Medical School, São José do Rio Preto, São Paulo, Brazil.
| | - Marcela P Capobianco
- Department of Biology, São Paulo State University, São José do Rio Preto, São Paulo, Brazil
| | - Luciane M Storti-Melo
- Laboratory of Molecular Genetics and Biotechnology, Department of Biology, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - Maristela G Cunha
- Laboratory of Microbiology and Immunology, Institute of Biological Sciences, Federal University of Pará (Universidade Federal do Pará-UFPA), Belém, State of Pará (PA), Brazil
| | - Gustavo C Cassiano
- Laboratory of Tropical Diseases-Department of Genetics, Evolution and Bioagents, Universidade de Campinas, Campinas, SP, Brazil
| | - Ricardo Luiz D Machado
- Department of Dermatology, Infectious and Parasitic Diseases, São José do Rio Preto Medical School, São José do Rio Preto, São Paulo, Brazil.,Department of Biology, São Paulo State University, São José do Rio Preto, São Paulo, Brazil.,Laboratory of Basic Research in Malaria, Section of Parasitology, Evandro Chagas Institute, Belém, PA, Brazil
| |
Collapse
|
50
|
Panda AK, Das BK, Panda A, Tripathy R, Pattnaik SS, Mahto H, Pied S, Pathak S, Sharma S, Ravindran B. Heterozygous mutants of TIRAP (S180L) polymorphism protect adult patients with Plasmodium falciparum infection against severe disease and mortality. INFECTION GENETICS AND EVOLUTION 2016; 43:146-50. [PMID: 27166096 DOI: 10.1016/j.meegid.2016.04.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 04/19/2016] [Accepted: 04/28/2016] [Indexed: 12/21/2022]
Abstract
Toll-interleukin-1 receptor domain containing adapter protein (TIRAP) plays a crucial role in TLR2 and TLR4 signaling pathways. Glycosylphospatidylinositol (GPI), considered a toxin molecule of Plasmodium falciparum, interacts with TLR2 and 4 to induce an immune inflammatory response. A single nucleotide polymorphism at coding region of TIRAP (S180L) has been reported to influence TLRs signaling. In the present study, we investigated the association of TIRAP (S180L) polymorphism with susceptibility/resistance to severe P. falciparum malaria in a cohort of adult patients from India. TIRAP S180L polymorphism was typed in 347 cases of severe malaria (SM), 232 uncomplicated malaria and 150 healthy controls. Plasma levels of TNF-α was quantified by ELISA. Heterozygous mutation (S/L) conferred significant protection against MOD (multi organ dysfunction), NCSM (non-cerebral severe malaria) as well as mortality. Interestingly, homozygous mutants (L/L) had 16 fold higher susceptibility to death. TIRAP mutants (S/L and L/L) were associated with significantly higher plasma TNF-α levels compared to wild type (S/S). The results of the present study demonstrate that TIRAP S180L heterozygous mutation may protect patients against severe malaria and mortality.
Collapse
Affiliation(s)
- Aditya K Panda
- Centre for Life Sciences, Central University of Jharkhand, Brambe, Ranchi, India; Infectious Disease Biology Group, Institute of Life Sciences, Bhubaneswar, Odisha, India.
| | - Bidyut K Das
- Infectious Disease Biology Group, Institute of Life Sciences, Bhubaneswar, Odisha, India; Department of Medicine, S.C.B. Medical College, Cuttack 753007, Odisha, India.
| | - Abhinash Panda
- Department of Medicine, S.C.B. Medical College, Cuttack 753007, Odisha, India.
| | - Rina Tripathy
- Department of Biochemistry, S.C.B. Medical College, Cuttack 753007, Odisha, India.
| | - Sarit S Pattnaik
- Department of Medicine, S.C.B. Medical College, Cuttack 753007, Odisha, India.
| | - Harishankar Mahto
- Centre for Life Sciences, Central University of Jharkhand, Brambe, Ranchi, India
| | - Sylviane Pied
- Basic and Clinical Immunology of Parasitic Diseases Group, Centre for Infection and Immunity of Lille, 59019 Lille Cedex, France.
| | - Sulabha Pathak
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai 400005, India.
| | - Shobhona Sharma
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai 400005, India.
| | - Balachandran Ravindran
- Infectious Disease Biology Group, Institute of Life Sciences, Bhubaneswar, Odisha, India.
| |
Collapse
|