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Howland SW, Poh CM, Gun SY, Claser C, Malleret B, Shastri N, Ginhoux F, Grotenbreg GM, Rénia L. Brain microvessel cross-presentation is a hallmark of experimental cerebral malaria. EMBO Mol Med 2013; 5:984-99. [PMID: 23681698 PMCID: PMC3721469 DOI: 10.1002/emmm.201202273] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Revised: 04/04/2013] [Accepted: 04/05/2013] [Indexed: 01/02/2023] Open
Abstract
Cerebral malaria is a devastating complication of Plasmodium falciparum infection. Its pathogenesis is complex, involving both parasite- and immune-mediated events. CD8+ T cells play an effector role in murine experimental cerebral malaria (ECM) induced by Plasmodium berghei ANKA (PbA) infection. We have identified a highly immunogenic CD8 epitope in glideosome-associated protein 50 that is conserved across rodent malaria species. Epitope-specific CD8+ T cells are induced during PbA infection, migrating to the brain just before neurological signs manifest. They are functional, cytotoxic and can damage the blood–brain barrier in vivo. Such CD8+ T cells are also found in the brain during infection with parasite strains/species that do not induce neuropathology. We demonstrate here that PbA infection causes brain microvessels to cross-present parasite antigen, while non-ECM-causing parasites do not. Further, treatment with fast-acting anti-malarial drugs before the onset of ECM reduces parasite load and thus antigen presentation in the brain, preventing ECM death. Thus our data suggest that combined therapies targeting both the parasite and host antigen-presenting cells may improve the outcome of CM patients.
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Affiliation(s)
- Shanshan W Howland
- Singapore Immunology Network, Agency for Science, Technology and Research A*STAR, Singapore, Singapore
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52
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Russell B, Suwanarusk R, Malleret B, Costa FTM, Snounou G, Kevin Baird J, Nosten F, Rénia L. Human ex vivo studies on asexual Plasmodium vivax: the best way forward. Int J Parasitol 2012; 42:1063-70. [PMID: 23032102 DOI: 10.1016/j.ijpara.2012.08.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 08/07/2012] [Accepted: 08/14/2012] [Indexed: 11/17/2022]
Abstract
The lack of a continuous culture method for Plasmodium vivax has given the impression that investigations on this important species are severely curtailed. However, the use of new or improved ex vivo methods and tools to study fresh and thawed isolates from vivax malaria patients is currently providing useful data on P. vivax, such as sensitivity to antimalarial drugs, invasion mechanisms and pathobiology. This review discusses a practical framework for conducting ex vivo studies on the asexual erythrocytic stages of P. vivax and considers the synergies between ex vivo defined phenotypes, ex vivo derived 'omic' studies and in vivo clinical studies.
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Affiliation(s)
- Bruce Russell
- Singapore Immunology Network, Biopolis, Agency for Science Technology and Research, Singapore.
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53
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Hamimi C, Bruel T, Dereuddre-Bosquet N, Cosma A, Shin S, Corneau A, Versmisse P, Torres C, Delache B, Even S, Guenounou S, Targat B, Malleret B, Karlsson I, Barré-Sinoussi F, Le-Grand R, Pancino G, Saez-Cirion A, Vaslin B. Loss and regain of SIV control upon CD8+ cell depletion in vivo in SIV-controller macaques is not associated with efficient SIV specific CD8+ T-cells. Retrovirology 2012. [PMCID: PMC3441304 DOI: 10.1186/1742-4690-9-s2-p287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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54
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Haniffa M, Shin A, Bigley V, McGovern N, Teo P, See P, Wasan PS, Wang XN, Malinarich F, Malleret B, Larbi A, Tan P, Zhao H, Poidinger M, Pagan S, Cookson S, Dickinson R, Dimmick I, Jarrett RF, Renia L, Tam J, Song C, Connolly J, Chan JKY, Gehring A, Bertoletti A, Collin M, Ginhoux F. Human tissues contain CD141hi cross-presenting dendritic cells with functional homology to mouse CD103+ nonlymphoid dendritic cells. Immunity 2012; 37:60-73. [PMID: 22795876 PMCID: PMC3476529 DOI: 10.1016/j.immuni.2012.04.012] [Citation(s) in RCA: 545] [Impact Index Per Article: 45.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Revised: 03/21/2012] [Accepted: 04/07/2012] [Indexed: 02/08/2023]
Abstract
Dendritic cell (DC)-mediated cross-presentation of exogenous antigens acquired in the periphery is critical for the initiation of CD8+ T cell responses. Several DC subsets are described in human tissues but migratory cross-presenting DCs have not been isolated, despite their potential importance in immunity to pathogens, vaccines, and tumors and tolerance to self. Here, we identified a CD141hi DC present in human interstitial dermis, liver, and lung that was distinct from the majority of CD1c+ and CD14+ tissue DCs and superior at cross-presenting soluble antigens. Cutaneous CD141hi DCs were closely related to blood CD141+ DCs, and migratory counterparts were found among skin-draining lymph node DCs. Comparative transcriptomic analysis with mouse showed tissue DC subsets to be conserved between species and permitted close alignment of human and mouse DC subsets. These studies inform the rational design of targeted immunotherapies and facilitate translation of mouse functional DC biology to the human setting.
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Affiliation(s)
- Muzlifah Haniffa
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
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55
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Hoeffel G, Wang Y, Greter M, See P, Teo P, Malleret B, Leboeuf M, Low D, Oller G, Almeida F, Choy SHY, Grisotto M, Renia L, Conway SJ, Stanley ER, Chan JKY, Ng LG, Samokhvalov IM, Merad M, Ginhoux F. Adult Langerhans cells derive predominantly from embryonic fetal liver monocytes with a minor contribution of yolk sac-derived macrophages. ACTA ACUST UNITED AC 2012; 209:1167-81. [PMID: 22565823 PMCID: PMC3371735 DOI: 10.1084/jem.20120340] [Citation(s) in RCA: 542] [Impact Index Per Article: 45.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Langerhans cells (LCs) are the dendritic cells (DCs) of the epidermis, forming one of the first hematopoietic lines of defense against skin pathogens. In contrast to other DCs, LCs arise from hematopoietic precursors that seed the skin before birth. However, the origin of these embryonic precursors remains unclear. Using in vivo lineage tracing, we identify a first wave of yolk sac (YS)-derived primitive myeloid progenitors that seed the skin before the onset of fetal liver hematopoiesis. YS progenitors migrate to the embryo proper, including the prospective skin, where they give rise to LC precursors, and the brain rudiment, where they give rise to microglial cells. However, in contrast to microglia, which remain of YS origin throughout life, YS-derived LC precursors are largely replaced by fetal liver monocytes during late embryogenesis. Consequently, adult LCs derive predominantly from fetal liver monocyte-derived cells with a minor contribution of YS-derived cells. Altogether, we establish that adult LCs have a dual origin, bridging early embryonic and late fetal myeloid development.
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Affiliation(s)
- Guillaume Hoeffel
- Singapore Immunology Network, Agency for Science, Technology and Research (A*STAR), Immunos Building #3-4, BIOPOLIS, 138648, Singapore
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56
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Her Z, Malleret B, Chan M, Ong EKS, Wong SC, Kwek DJC, Tolou H, Lin RTP, Tambyah PA, Rénia L, Ng LFP. Active infection of human blood monocytes by Chikungunya virus triggers an innate immune response. J Immunol 2010; 184:5903-13. [PMID: 20404274 DOI: 10.4049/jimmunol.0904181] [Citation(s) in RCA: 206] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Chikungunya virus (CHIKV) is an alphavirus that causes chronic and incapacitating arthralgia in humans. To date, interactions between the immune system and the different stages of the virus life cycle remain poorly defined. We demonstrated for the first time that CHIKV Ags could be detected in vivo in the monocytes of acutely infected patients. Using in vitro experimental systems, whole blood and purified monocytes, we confirmed that monocytes could be infected and virus growth could be sustained. CHIKV interactions with monocytes, and with other blood leukocytes, induced a robust and rapid innate immune response with the production of specific chemokines and cytokines. In particular, high levels of IFN-alpha were produced rapidly after CHIKV incubation with monocytes. The identification of monocytes during the early phase of CHIKV infection in vivo is significant as infected monocyte/macrophage cells have been detected in the synovial tissues of chronically CHIKV-infected patients, and these cells may behave as the vehicles for virus dissemination. This may explain the persistence of joint symptoms despite the short duration of viremia. Our results provide a better understanding on the basic mechanisms of infection and early antiviral immune responses and will help in the development of future effective control strategies.
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Affiliation(s)
- Zhisheng Her
- Singapore Immunology Network, Agency for Science, Technology and Research, Biopolis, Singapore
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57
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Manéglier B, Malleret B, Guillemin GJ, Spreux-Varoquaux O, Devillier P, Rogez-Kreuz C, Porcheray F, Thérond P, Dormont D, Clayette P. Modulation of indoleamine-2,3-dioxygenase expression and activity by HIV-1 in human macrophages. Fundam Clin Pharmacol 2009; 23:573-81. [DOI: 10.1111/j.1472-8206.2009.00703.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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58
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Maneglier B, Rogez-Kreuz C, Spreux-Varoquaux O, Malleret B, Thérond P, Samah B, Drouet I, Dormont D, Advenier C, Clayette P. Comparative effects of two type I interferons, human IFN-? and ovine IFN-? on indoleamine-2,3-dioxygenase in primary cultures of human macrophages. Fundam Clin Pharmacol 2007; 21:29-34. [PMID: 17227442 DOI: 10.1111/j.1472-8206.2006.00460.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Type I interferons (IFNs) are widely used to treat viral diseases. Depressive symptoms and suicide attempts are common neuropsychiatric side-effects during treatment with type I IFNs. Activation of indoleamine-2,3-dioxygenase (IDO), the first and rate-limiting enzyme of the kynurenine pathway by IFNs, leads to an increase in tryptophan (Trp) catabolism. Low levels of Trp lead to decrease of serotonin synthesis, which is likely to be related to the depressive symptoms. Ovine type I interferon-tau (IFN-tau) has a more potent antiretroviral effect and is less toxic than human type I IFN-alpha. Effects of IFN-tau and IFN-alpha on IDO expression and activity in primary cultures of human macrophages were compared in parallel to those of IFN-gamma, considered as one of the most potent IDO inducer. We found that both IFN-alpha and IFN-tau were poor inducers of IDO compared with IFN-gamma. However, IDO activation was slightly and significantly lower with ovine IFN-tau than human IFN-alpha, suggesting that ovine IFN-tau might have a lower impact on serotoninergic pathway compared with human IFN-alpha.
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Affiliation(s)
- Benjamin Maneglier
- Département de Biologie, Centre Hospitalier de Versailles, 78150 Le Chesnay, France
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