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Labuda LA, Adegnika AA, Rosa BA, Martin J, Ateba-Ngoa U, Amoah AS, Lima HM, Meurs L, Mbow M, Manurung MD, Zinsou JF, Smits HH, Kremsner PG, Mitreva M, Yazdanbakhsh M. A Praziquantel Treatment Study of Immune and Transcriptome Profiles in Schistosoma haematobium-Infected Gabonese Schoolchildren. J Infect Dis 2021; 222:2103-2113. [PMID: 31844885 PMCID: PMC7661769 DOI: 10.1093/infdis/jiz641] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 08/01/2019] [Accepted: 12/15/2019] [Indexed: 12/13/2022] Open
Abstract
Background Although Schistosoma haematobium infection has been reported to be associated with alterations in immune function, in particular immune hyporesponsiveness, there have been only few studies that have used the approach of removing infection by drug treatment to establish this and to understand the underlying molecular mechanisms. Methods Schistosoma haematobium-infected schoolchildren were studied before and after praziquantel treatment and compared with uninfected controls. Cellular responses were characterized by cytokine production and flow cytometry, and in a subset of children RNA sequencing (RNA-Seq) transcriptome profiling was performed. Results Removal of S haematobium infection resulted in increased schistosome-specific cytokine responses that were negatively associated with CD4+CD25+FOXP3+ T-cells and accompanied by increased frequency of effector memory T-cells. Innate responses to Toll like receptor (TLR) ligation decreased with treatment and showed positive association with CD4+CD25+FOXP3+ T-cells. At the transcriptome level, schistosome infection was associated with enrichment in cell adhesion, whereas parasite removal was associated with a more quiescent profile. Further analysis indicated that alteration in cellular energy metabolism was associated with S haematobium infection and that the early growth response genes 2 and 3 (EGR 2 and EGR3), transcription factors that negatively regulate T-cell activation, may play a role in adaptive immune hyporesponsiveness. Conclusions Using a longitudinal study design, we found contrasting effects of schistosome infection on innate and adaptive immune responses. Whereas the innate immune system appears more activated, the adaptive immunity is in a hyporesponsive state reflected in alterations in CD4+CD25+FOXP3+ T-cells, cellular metabolism, and transcription factors involved in anergy.
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Affiliation(s)
- Lucja A Labuda
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands.,Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
| | - Ayola A Adegnika
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands.,Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
| | - Bruce A Rosa
- McDonnell Genome Institute, Washington University in St. Louis, St. Louis, Missouri, USA
| | - John Martin
- McDonnell Genome Institute, Washington University in St. Louis, St. Louis, Missouri, USA
| | - Ulysse Ateba-Ngoa
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands.,Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
| | - Abena Serwaa Amoah
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands.,Department of Parasitology, Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Accra, Ghana
| | - Honorine Mbenkep Lima
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands.,Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
| | - Lynn Meurs
- Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
| | - Moustapha Mbow
- Service d'Immunologie du Département de Pharmacie, FMPO, Université Cheikh Anta Diop, Fann- Dakar, Sénégal
| | - Mikhael D Manurung
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
| | - Jeannot F Zinsou
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon
| | - Hermelijn H Smits
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
| | - Peter G Kremsner
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
| | - Makedonka Mitreva
- McDonnell Genome Institute, Washington University in St. Louis, St. Louis, Missouri, USA.,Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Maria Yazdanbakhsh
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
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Dejon-Agobe JC, Ateba-Ngoa U, Lalremruata A, Homoet A, Engelhorn J, Nouatin OP, Edoa JR, Fernandes JF, Esen M, Mouwenda YD, Betouke Ongwe EM, Massinga-Loembe M, Hoffman SL, Sim BKL, Theisen M, Kremsner PG, Adegnika AA, Lell B, Mordmüller B. Controlled Human Malaria Infection of Healthy Adults With Lifelong Malaria Exposure to Assess Safety, Immunogenicity, and Efficacy of the Asexual Blood Stage Malaria Vaccine Candidate GMZ2. Clin Infect Dis 2020; 69:1377-1384. [PMID: 30561539 DOI: 10.1093/cid/ciy1087] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 12/18/2018] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND GMZ2 is a recombinant malaria vaccine inducing immune responses against Plasmodium falciparum (Pf) merozoite surface protein-3 and glutamate-rich protein. We used standardized controlled human malaria infection (CHMI) to assess the efficacy of this asexual blood-stage vaccine. METHODS We vaccinated 50 healthy, adult volunteers with lifelong exposure to Pf 3 times, at 4-week intervals, with 30 or 100 µg GMZ2 formulated in CAF01, a liposome-based adjuvant; 100 µg GMZ2, formulated in Alhydrogel; or a control vaccine (Verorab). Approximately 13 weeks after the last vaccination, 35/50 volunteers underwent CHMI by direct venous inoculation of 3200 Pf sporozoites (Sanaria® PfSPZ Challenge). RESULTS Adverse events were similarly distributed between GMZ2 and control vaccinees. Baseline-corrected anti-GMZ2 antibody concentrations 4 weeks after the last vaccination were higher in all 3 GMZ2-vaccinated arms, compared to the control group. All GMZ2 formulations induced similar antibody levels. CHMI resulted in 29/34 (85%) volunteers with Pf parasitemia and 15/34 (44%) with malaria (parasitemia and symptoms). The proportion of participants with malaria (2/5 control, 6/10 GMZ2-Alhydrogel, 2/8 30 µg GMZ2-CAF01, and 5/11 100 µg GMZ2-CAF01) and the time it took them to develop malaria were similar in all groups. Baseline, vaccine-specific antibody concentrations were associated with protection against malaria. CONCLUSIONS GMZ2 is well tolerated and immunogenic in lifelong-Pf-exposed adults from Gabon, with similar antibody responses regardless of formulation. CHMI showed no protective effect of prior vaccination with GMZ2, although baseline, vaccine-specific antibody concentrations were associated with protection. CHMI with the PfSPZ Challenge is a potent new tool to validate asexual, blood-stage malaria vaccines in Africa. CLINICAL TRIALS REGISTRATION Pan-African Clinical Trials: PACTR201503001038304.
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Affiliation(s)
- Jean Claude Dejon-Agobe
- Centre de Recherches Médicales de Lambaréné and African Partner Institution, German Center for Infection Research, Gabon
| | - Ulysse Ateba-Ngoa
- Centre de Recherches Médicales de Lambaréné and African Partner Institution, German Center for Infection Research, Gabon.,Institut für Tropenmedizin, Universität Tübingen and German Center for Infection Research, Germany.,Department of Parasitology, Leiden University Medical Center, The Netherlands
| | - Albert Lalremruata
- Institut für Tropenmedizin, Universität Tübingen and German Center for Infection Research, Germany
| | - Andreas Homoet
- Centre de Recherches Médicales de Lambaréné and African Partner Institution, German Center for Infection Research, Gabon
| | - Julie Engelhorn
- Centre de Recherches Médicales de Lambaréné and African Partner Institution, German Center for Infection Research, Gabon
| | - Odilon Paterne Nouatin
- Centre de Recherches Médicales de Lambaréné and African Partner Institution, German Center for Infection Research, Gabon
| | - Jean Ronald Edoa
- Centre de Recherches Médicales de Lambaréné and African Partner Institution, German Center for Infection Research, Gabon
| | - José F Fernandes
- Centre de Recherches Médicales de Lambaréné and African Partner Institution, German Center for Infection Research, Gabon.,Institut für Tropenmedizin, Universität Tübingen and German Center for Infection Research, Germany
| | - Meral Esen
- Centre de Recherches Médicales de Lambaréné and African Partner Institution, German Center for Infection Research, Gabon.,Institut für Tropenmedizin, Universität Tübingen and German Center for Infection Research, Germany
| | - Yoanne Darelle Mouwenda
- Centre de Recherches Médicales de Lambaréné and African Partner Institution, German Center for Infection Research, Gabon.,Department of Parasitology, Leiden University Medical Center, The Netherlands
| | - Eunice M Betouke Ongwe
- Centre de Recherches Médicales de Lambaréné and African Partner Institution, German Center for Infection Research, Gabon
| | - Marguerite Massinga-Loembe
- Centre de Recherches Médicales de Lambaréné and African Partner Institution, German Center for Infection Research, Gabon.,Institut für Tropenmedizin, Universität Tübingen and German Center for Infection Research, Germany
| | | | | | - Michael Theisen
- Department for Congenital Disorders, Statens Serum Institut, Denmark.,Centre for Medical Parasitology at Department of International Health, Immunology and Microbiology, University of Copenhagen, Denmark.,Department of Infectious Diseases, Copenhagen University Hospital, Rigshospitalet, Denmark
| | - Peter G Kremsner
- Centre de Recherches Médicales de Lambaréné and African Partner Institution, German Center for Infection Research, Gabon.,Institut für Tropenmedizin, Universität Tübingen and German Center for Infection Research, Germany
| | - Ayôla A Adegnika
- Centre de Recherches Médicales de Lambaréné and African Partner Institution, German Center for Infection Research, Gabon.,Institut für Tropenmedizin, Universität Tübingen and German Center for Infection Research, Germany.,Department of Parasitology, Leiden University Medical Center, The Netherlands
| | - Bertrand Lell
- Centre de Recherches Médicales de Lambaréné and African Partner Institution, German Center for Infection Research, Gabon.,Institut für Tropenmedizin, Universität Tübingen and German Center for Infection Research, Germany
| | - Benjamin Mordmüller
- Centre de Recherches Médicales de Lambaréné and African Partner Institution, German Center for Infection Research, Gabon.,Institut für Tropenmedizin, Universität Tübingen and German Center for Infection Research, Germany
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3
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Ateba-Ngoa U, Edoa JR, Adegbite BR, Rossatanga EG, Madiou D, Mfoumbi A, Mevyann C, Achimi Agbo P, Mahoumbou J, Gould S, Lell B, Adegnika AA, Köhler C, Kremsner PG, Massinga-Loembe M, Alabi A, Grobusch MP. Implementation of multidrug-resistant tuberculosis (MDR-TB) treatment in Gabon: lessons learnt from the field. Infection 2019; 47:811-816. [PMID: 31073710 DOI: 10.1007/s15010-019-01314-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 04/30/2019] [Indexed: 02/07/2023]
Abstract
PURPOSE Since May 2016, WHO recommended a 9-12 month short-treatment regimen for multidrug-resistant tuberculosis (MDR-TB) treatment known as the 'Bangladesh Regimen'. However, limited data exist on the appropriateness thereof, and its implementation in low- and middle-income countries (LMIC). We report here on the pilot phase of the evaluation of the Bangladesh regimen in Gabon, prior to its endorsement by the WHO. METHODS This ongoing observational study started in September 2015. Intensive training of hospital health workers as well as community information and education were conducted. GeneXpert-confirmed MDR-TB patients received the second-line anti-tuberculosis drugs (4KmMfxPtoHCfzEZ/5MfxCfzEZ). Sputum smears and cultures were done monthly. Adverse events were monitored daily. RESULTS Eleven patients have been treated for MDR-TB piloting the short regimen. All were HIV-negative and presented in poor health with extensive pulmonary lesions. The overall sputum culture conversion rate was 64% after 4 months of treatment. Three patients developed marked hearing loss; one a transient cutaneous rash. Of 11 patients in our continuous care, 7 (63.6%) significantly improved clinically and bacteriologically. One (9.1%) patient experienced a treatment failure, two (18.2%) died, and one (9.1%) was lost to follow up. CONCLUSIONS Our pioneering data on systematic MDR-TB treatment in Gabon, with currently almost total absence of resistance against the second-line drugs, demonstrate that a 9-month regimen has the capacity to facilitate early culture negativity and sustained clinical improvement. Close adverse events monitoring and continuous care are vital to success.
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Affiliation(s)
- U Ateba-Ngoa
- Centre des Recherches Médicales de Lambaréné, Lambarene, Gabon
- Institut für Tropenmedizin, Eberhard Karls Universität, Tübingen, Germany
| | - J R Edoa
- Centre des Recherches Médicales de Lambaréné, Lambarene, Gabon
- Institut für Tropenmedizin, Eberhard Karls Universität, Tübingen, Germany
| | - B R Adegbite
- Centre des Recherches Médicales de Lambaréné, Lambarene, Gabon
- Institut für Tropenmedizin, Eberhard Karls Universität, Tübingen, Germany
| | - E G Rossatanga
- Centre Hospitalier Régional Georges Rawiri de Lambaréné, Lambarene, Gabon
| | - D Madiou
- Centre Hospitalier Régional Georges Rawiri de Lambaréné, Lambarene, Gabon
| | - A Mfoumbi
- Centre des Recherches Médicales de Lambaréné, Lambarene, Gabon
| | - C Mevyann
- Centre des Recherches Médicales de Lambaréné, Lambarene, Gabon
| | - P Achimi Agbo
- Centre des Recherches Médicales de Lambaréné, Lambarene, Gabon
| | - J Mahoumbou
- Programme National de Lutte contre la Tuberculose, Ministry of Health, Libreville, Gabon
| | - S Gould
- Centre des Recherches Médicales de Lambaréné, Lambarene, Gabon
| | - B Lell
- Centre des Recherches Médicales de Lambaréné, Lambarene, Gabon
- Institut für Tropenmedizin, Eberhard Karls Universität, Tübingen, Germany
| | - A A Adegnika
- Centre des Recherches Médicales de Lambaréné, Lambarene, Gabon
- Institut für Tropenmedizin, Eberhard Karls Universität, Tübingen, Germany
| | - C Köhler
- Centre des Recherches Médicales de Lambaréné, Lambarene, Gabon
- Institut für Tropenmedizin, Eberhard Karls Universität, Tübingen, Germany
| | - P G Kremsner
- Centre des Recherches Médicales de Lambaréné, Lambarene, Gabon
- Institut für Tropenmedizin, Eberhard Karls Universität, Tübingen, Germany
| | - M Massinga-Loembe
- Centre des Recherches Médicales de Lambaréné, Lambarene, Gabon
- Institut für Tropenmedizin, Eberhard Karls Universität, Tübingen, Germany
| | - A Alabi
- Centre des Recherches Médicales de Lambaréné, Lambarene, Gabon
- Institut für Tropenmedizin, Eberhard Karls Universität, Tübingen, Germany
| | - M P Grobusch
- Centre des Recherches Médicales de Lambaréné, Lambarene, Gabon.
- Institut für Tropenmedizin, Eberhard Karls Universität, Tübingen, Germany.
- Department of Infectious Diseases, Center of Tropical Medicine and Travel Medicine, Amsterdam University Medical Centers, Location AMC, University of Amsterdam, Amsterdam, The Netherlands.
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4
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Dejon-Agobé JC, Zinsou JF, Honkpehedji YJ, Ateba-Ngoa U, Edoa JR, Adegbite BR, Mombo-Ngoma G, Agnandji ST, Ramharter M, Kremsner PG, Lell B, Grobusch MP, Adegnika AA. Schistosoma haematobium effects on Plasmodium falciparum infection modified by soil-transmitted helminths in school-age children living in rural areas of Gabon. PLoS Negl Trop Dis 2018; 12:e0006663. [PMID: 30080853 PMCID: PMC6095623 DOI: 10.1371/journal.pntd.0006663] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 08/16/2018] [Accepted: 07/05/2018] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Malaria burden remains high in the sub-Saharan region where helminths are prevalent and where children are often infected with both types of parasites. Although the effect of helminths on malaria infection is evident, the impact of these co-infections is not clearly elucidated yet and the scarce findings are conflicting. In this study, we investigated the effect of schistosomiasis, considering soil-transmitted helminths (STH), on prevalence and incidence of Plasmodium falciparum infection. METHODOLOGY This longitudinal survey was conducted in school-age children living in two rural communities in the vicinity of Lambaréné, Gabon. Thick blood smear light microscopy, urine filtration and the Kato-Katz technique were performed to detect malaria parasites, S. haematobium eggs and, STH eggs, respectively. P. falciparum carriage was assessed at inclusion, and incidence of malaria and time to the first malaria event were recorded in correlation with Schistosoma carriage status. Stratified multivariate analysis using generalized linear model was used to assess the risk of plasmodium infection considering interaction with STH, and survival analysis to assess time to malaria. MAIN FINDINGS The overall prevalence on subject enrolment was 30%, 23% and 9% for S. haematobium, P. falciparum infections and co-infection with both parasites, respectively. Our results showed that schistosomiasis in children tends to increase the risk of plasmodium infection but a combined effect with Trichuris trichiura or hookworm infection clearly increase the risk (aOR = 3.9 [95%CI: 1.7-9.2]). The incidence of malaria over time was 0.51[95%CI: 0.45-0.57] per person-year and was higher in the Schistosoma-infected group compared to the non-infected group (0.61 vs 0.43, p = 0.02), with a significant delay of time-to first-malaria event only in children aged from 6 to 10-years-old infected with Schistosoma haematobium. CONCLUSIONS Our results suggest that STH enhance the risk for P. falciparum infection in schistosomiasis-positive children, and when infected, that schistosomiasis enhances susceptibility to developing malaria in young children but not in older children.
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Affiliation(s)
- Jean Claude Dejon-Agobé
- Centre de Recherche Médicales de Lambaréné (CERMEL) and African Partner Institution, German Center for Infection Research, Lambaréné, Gabon
- Center of Tropical Medicine and Travel Medicine, Department of Infectious Diseases, Division of Internal Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Jeannot Fréjus Zinsou
- Centre de Recherche Médicales de Lambaréné (CERMEL) and African Partner Institution, German Center for Infection Research, Lambaréné, Gabon
- Department of Parasitology, Leiden University Medical Center, Leiden, the Netherlands
| | - Yabo Josiane Honkpehedji
- Centre de Recherche Médicales de Lambaréné (CERMEL) and African Partner Institution, German Center for Infection Research, Lambaréné, Gabon
- Department of Parasitology, Leiden University Medical Center, Leiden, the Netherlands
| | - Ulysse Ateba-Ngoa
- Centre de Recherche Médicales de Lambaréné (CERMEL) and African Partner Institution, German Center for Infection Research, Lambaréné, Gabon
| | - Jean-Ronald Edoa
- Centre de Recherche Médicales de Lambaréné (CERMEL) and African Partner Institution, German Center for Infection Research, Lambaréné, Gabon
| | - Bayodé Roméo Adegbite
- Centre de Recherche Médicales de Lambaréné (CERMEL) and African Partner Institution, German Center for Infection Research, Lambaréné, Gabon
| | - Ghyslain Mombo-Ngoma
- Centre de Recherche Médicales de Lambaréné (CERMEL) and African Partner Institution, German Center for Infection Research, Lambaréné, Gabon
- Departement de Parasitologie-Mycologie, Faculté de Médecine, Université des Sciences de la Santé, Owendo, Gabon
| | - Selidji Todagbe Agnandji
- Centre de Recherche Médicales de Lambaréné (CERMEL) and African Partner Institution, German Center for Infection Research, Lambaréné, Gabon
- Institute of Tropical Medicine, University of Tübingen and Partner site Tübingen, German Center for Infection Research, Tübingen, Germany
| | - Michael Ramharter
- Centre de Recherche Médicales de Lambaréné (CERMEL) and African Partner Institution, German Center for Infection Research, Lambaréné, Gabon
- Department of Tropical Medicine, Bernhard Nocht Institute for Tropical Medicine & I, Department of Medicine, University Medical Centre, Hamburg-Eppendorf, Hamburg, Germany
| | - Peter Gottfried Kremsner
- Centre de Recherche Médicales de Lambaréné (CERMEL) and African Partner Institution, German Center for Infection Research, Lambaréné, Gabon
- Institute of Tropical Medicine, University of Tübingen and Partner site Tübingen, German Center for Infection Research, Tübingen, Germany
| | - Bertrand Lell
- Centre de Recherche Médicales de Lambaréné (CERMEL) and African Partner Institution, German Center for Infection Research, Lambaréné, Gabon
- Institute of Tropical Medicine, University of Tübingen and Partner site Tübingen, German Center for Infection Research, Tübingen, Germany
| | - Martin Peter Grobusch
- Centre de Recherche Médicales de Lambaréné (CERMEL) and African Partner Institution, German Center for Infection Research, Lambaréné, Gabon
- Center of Tropical Medicine and Travel Medicine, Department of Infectious Diseases, Division of Internal Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
- Institute of Tropical Medicine, University of Tübingen and Partner site Tübingen, German Center for Infection Research, Tübingen, Germany
| | - Ayôla Akim Adegnika
- Centre de Recherche Médicales de Lambaréné (CERMEL) and African Partner Institution, German Center for Infection Research, Lambaréné, Gabon
- Department of Parasitology, Leiden University Medical Center, Leiden, the Netherlands
- Institute of Tropical Medicine, University of Tübingen and Partner site Tübingen, German Center for Infection Research, Tübingen, Germany
- * E-mail:
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Alabi AS, Traoré AN, Loembe MM, Ateba-Ngoa U, Frank M, Adegnika AA, Lell B, Mahoumbou J, Köhler C, Kremsner PG, Grobusch MP. Enhanced laboratory capacity development: a boost for effective tuberculosis control in resource-limited settings. Int J Infect Dis 2016; 56:81-84. [PMID: 27888000 DOI: 10.1016/j.ijid.2016.11.404] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2016] [Revised: 11/14/2016] [Accepted: 11/15/2016] [Indexed: 12/31/2022] Open
Abstract
Both routine and research tuberculosis (TB) laboratory capacity urgently need to be expanded in large parts of Sub-Saharan Africa. In 2009, the Centre de Recherches Médicales de Lambaréné (CERMEL) took a strategic decision to expand its activities by building TB laboratory capacity to address research questions and to improve routine diagnostic and treatment capacity. Over the past 7 years, a standard laboratory has been developed that is contributing significantly to TB diagnosis, treatment, and control in Gabon; training has also been provided for TB research staff in Central Africa. CERMEL has a cordial relationship with the Gabon National TB Control Programme (PNLT), which has culminated in a successful Global Fund joint application. This endeavour is considered a model for similar developments needed in areas of high TB prevalence and where TB control remains poor to date.
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Affiliation(s)
- Abraham Sunday Alabi
- Centre des Recherches Médicales de Lambaréné (CERMEL), PB 118, Lambaréné, Gabon; Eberhard Karls Universität, Institut für Tropenmedizin, Tübingen, Germany.
| | - Afsatou Ndama Traoré
- Centre des Recherches Médicales de Lambaréné (CERMEL), PB 118, Lambaréné, Gabon; Microbiology Department, University of Venda, Thohoyandou, South Africa
| | - Marguerite Massinga Loembe
- Centre des Recherches Médicales de Lambaréné (CERMEL), PB 118, Lambaréné, Gabon; Eberhard Karls Universität, Institut für Tropenmedizin, Tübingen, Germany; Departement de Bacteriologie Virologie, Faculte de medicine, Universite des Sciences de la Sante, Libreville, Gabon
| | - Ulysse Ateba-Ngoa
- Centre des Recherches Médicales de Lambaréné (CERMEL), PB 118, Lambaréné, Gabon; Eberhard Karls Universität, Institut für Tropenmedizin, Tübingen, Germany
| | - Matthias Frank
- Eberhard Karls Universität, Institut für Tropenmedizin, Tübingen, Germany
| | - Ayola Akim Adegnika
- Centre des Recherches Médicales de Lambaréné (CERMEL), PB 118, Lambaréné, Gabon; Eberhard Karls Universität, Institut für Tropenmedizin, Tübingen, Germany
| | - Bertrand Lell
- Centre des Recherches Médicales de Lambaréné (CERMEL), PB 118, Lambaréné, Gabon; Eberhard Karls Universität, Institut für Tropenmedizin, Tübingen, Germany
| | - Jocelyn Mahoumbou
- Programme National de Lutte Contre la Tuberculose (PNLT), Ministry of Health, Libreville, Gabon
| | - Carsten Köhler
- Eberhard Karls Universität, Institut für Tropenmedizin, Tübingen, Germany; German Centre for Infection Research (DZIF), Partner Site Tübingen, Tübingen, Germany
| | - Peter Gottfried Kremsner
- Centre des Recherches Médicales de Lambaréné (CERMEL), PB 118, Lambaréné, Gabon; Eberhard Karls Universität, Institut für Tropenmedizin, Tübingen, Germany; German Centre for Infection Research (DZIF), Partner Site Tübingen, Tübingen, Germany
| | - Martin Peter Grobusch
- Centre des Recherches Médicales de Lambaréné (CERMEL), PB 118, Lambaréné, Gabon; Eberhard Karls Universität, Institut für Tropenmedizin, Tübingen, Germany; German Centre for Infection Research (DZIF), Partner Site Tübingen, Tübingen, Germany; Centre of Tropical Medicine and Travel Medicine, Department of Infectious Diseases, Amsterdam Medical Centre, University of Amsterdam, The Netherlands
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6
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Ateba-Ngoa U, Jones S, Zinsou JF, Honkpehedji J, Adegnika AA, Agobe JCD, Massinga-Loembe M, Mordmüller B, Bousema T, Yazdanbakhsh M. Associations Between Helminth Infections, Plasmodium falciparum Parasite Carriage and Antibody Responses to Sexual and Asexual Stage Malarial Antigens. Am J Trop Med Hyg 2016; 95:394-400. [PMID: 27273645 DOI: 10.4269/ajtmh.15-0703] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Accepted: 12/28/2015] [Indexed: 12/28/2022] Open
Abstract
Infections with helminths and Plasmodium spp. overlap in their geographical distribution. It has been postulated that helminth infections may influence malarial transmission by altering Plasmodium falciparum gametocytogenesis. This cross-sectional study assessed the effect of helminth infections on P. falciparum gametocyte carriage and on humoral immune responses to sexual stage antigens in Gabon. Schistosoma haematobium and filarial infections as well as P. falciparum asexual forms and gametocyte carriage were determined. The antibody responses measured were to sexual (Pfs230, Pfs48/45) and asexual P. falciparum antigens (AMA1, MSP1, and GLURP). A total of 287 subjects were included. The prevalence of microscopically detectable P. falciparum asexual parasites was higher in S. haematobium-infected subjects in comparison to their uninfected counterparts (47% versus 26%, P = 0.003), but this was not different when filarial infections were considered. Plasmodium falciparum gametocyte carriage was similar between Schistosoma- or filaria-infected and uninfected subjects. We observed a significant decrease of Pfs48/45 immunoglobulin G titer in S. haematobium-infected subjects (P = 0.037), whereas no difference was seen for Pfs230 antibody titer, nor for antibodies to AMA1, MSP1, or GLURP. Our findings suggest an effect of S. haematobium on antibody responses to some P. falciparum gametocyte antigens that may have consequences for transmission-blocking immunity.
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Affiliation(s)
- Ulysse Ateba-Ngoa
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands. Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany. Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon.
| | - Sophie Jones
- Department of Immunology and Infection, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Jeannot Fréjus Zinsou
- Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany. Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon
| | - Josiane Honkpehedji
- Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany. Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon
| | - Ayola Akim Adegnika
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands. Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany. Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon
| | - Jean-Claude Dejon Agobe
- Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany. Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon
| | - Marguerite Massinga-Loembe
- Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany. Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon
| | - Benjamin Mordmüller
- Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany. Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon
| | - Teun Bousema
- Department of Immunology and Infection, London School of Hygiene and Tropical Medicine, London, United Kingdom. Department of Medical Microbiology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Maria Yazdanbakhsh
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
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Ateba-Ngoa U, Adegnika AA, Zinsou JF, Kassa Kassa RF, Smits H, Massinga-Loembe M, Mordmüller B, Kremsner PG, Yazdanbakhsh M. Cytokine and chemokine profile of the innate and adaptive immune response of Schistosoma haematobium and Plasmodium falciparum single and co-infected school-aged children from an endemic area of Lambaréné, Gabon. Malar J 2015; 14:94. [PMID: 25890010 PMCID: PMC4365807 DOI: 10.1186/s12936-015-0608-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [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] [Received: 08/20/2014] [Accepted: 02/09/2015] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Helminths and malaria are among the most prevalent infectious diseases in the world. They both occur in tropical area where they often affect the same populations. There are studies suggesting an effect of helminths on malariometric indices. For example, malaria attacks as well as disease severity has been shown to be influenced by a concurrent chronic helminth infection. However, there are also studies that show no effect of concurrent helminth infections on malarial outcomes. To start addressing this issue, the effect of chronic Schistosoma haematobium infection on both the innate and adaptive immune response of Plasmodium falciparum-infected subjects was assessed in an area endemic for both these infections in Gabon. METHOD Subjects infected with S. haematobium and or P. falciparum, as well as a control group with neither of these infections, were recruited. For innate immune response, heparinized blood was obtained and cultured for 24 hours with a panel of TLR ligands. For adaptive immune response, PBMC was isolated and stimulated with SEB for 72 hours. Cytokines and chemokines were measured in supernatants using a multiplex beads array immunoassay. Principal Component analysis was used to assess pattern of cytokine and chemokine responses representing the innate and adaptive components of the immune system. RESULTS Overall it was observed that the presence of P. falciparum infection was marked by an increase in innate and adaptive immune responsiveness while S. haematobium infection was characterized by an increased chemokine profile, with at the same time, lower pro inflammatory markers. When the study subjects were split into single infected and co-infected groups no effect of S. haematobium on the immune response of P. falciparum infected subjects was observed, neither for the innate nor for the adaptive component of the immune response. CONCLUSION This study provides original information on the cellular immune response of S. haematobium and/or P. falciparum in infected subjects. It rules out an effect of S. haematobium on the cytokine profile of subjects co-infected with P. falciparum.
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Affiliation(s)
- Ulysse Ateba-Ngoa
- Department of Parasitology, Leiden University Medical Center, Albinusdreef 2, 2333, Leiden, ZA, The Netherlands. .,Institut für Tropenmedizin, Universität Tübingen, Wilhelmstraβe 27, D-72074, Tübingen, Germany. .,Centre de Recherches Médicales de Lambaréné, BP: 118, Lambaréné, Gabon.
| | - Ayola Akim Adegnika
- Department of Parasitology, Leiden University Medical Center, Albinusdreef 2, 2333, Leiden, ZA, The Netherlands. .,Institut für Tropenmedizin, Universität Tübingen, Wilhelmstraβe 27, D-72074, Tübingen, Germany. .,Centre de Recherches Médicales de Lambaréné, BP: 118, Lambaréné, Gabon.
| | - Jeannot F Zinsou
- Centre de Recherches Médicales de Lambaréné, BP: 118, Lambaréné, Gabon.
| | | | - Hermelijn Smits
- Department of Parasitology, Leiden University Medical Center, Albinusdreef 2, 2333, Leiden, ZA, The Netherlands.
| | - Marguerite Massinga-Loembe
- Institut für Tropenmedizin, Universität Tübingen, Wilhelmstraβe 27, D-72074, Tübingen, Germany. .,Centre de Recherches Médicales de Lambaréné, BP: 118, Lambaréné, Gabon.
| | - Benjamin Mordmüller
- Institut für Tropenmedizin, Universität Tübingen, Wilhelmstraβe 27, D-72074, Tübingen, Germany. .,Centre de Recherches Médicales de Lambaréné, BP: 118, Lambaréné, Gabon.
| | - Peter G Kremsner
- Institut für Tropenmedizin, Universität Tübingen, Wilhelmstraβe 27, D-72074, Tübingen, Germany. .,Centre de Recherches Médicales de Lambaréné, BP: 118, Lambaréné, Gabon.
| | - Maria Yazdanbakhsh
- Department of Parasitology, Leiden University Medical Center, Albinusdreef 2, 2333, Leiden, ZA, The Netherlands. .,Centre de Recherches Médicales de Lambaréné, BP: 118, Lambaréné, Gabon.
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Ateba-Ngoa U, Mombo-Ngoma G, Zettlmeissl E, van der Vlugt LEPM, de Jong S, Matsiegui PB, Ramharter M, Kremsner PG, Yazdanbakhsh M, Adegnika AA. CD4+CD25hiFOXP3+ cells in cord blood of neonates born from filaria infected mother are negatively associated with CD4+Tbet+ and CD4+RORγt+ T cells. PLoS One 2014; 9:e114630. [PMID: 25531674 PMCID: PMC4273973 DOI: 10.1371/journal.pone.0114630] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 11/11/2014] [Indexed: 11/18/2022] Open
Abstract
Background Children who have been exposed in utero to maternal filarial infection are immunologically less responsive to filarial antigens, have less pathology, and are more susceptible to acquire infection than offspring of uninfected mothers. Moreover children from filaria infected mothers have been shown to be less responsive to vaccination as a consequence of an impairment of their immune response. However, it is not well known how in utero exposure to parasite antigens affects cellular immune responses. Methodology Here, 30 pregnant women were examined for the presence of microfilaria of Loa loa and Mansonella perstans in peripheral blood. At delivery, cord blood mononuclear cells (CBMC) were obtained and the CD4+T cells were phenotyped by expression of the transcription factors Tbet, RORγt, and FOXP3. Results No significant difference was observed between newborns from infected versus uninfected mothers in the frequencies of total CD4+T cells and CD4+T cells subsets including CD4+Tbet+, CD4+RORγt+ T and CD4+CD25hiFOXP3+ T cells. However, there was a negative association between CD4+CD25hiFOXP3+T cells and CD4+Tbet+ as well as CD4+RORγt+ T cells in the infected group only (B = −0.242, P = 0.002; B = −0.178, P = 0.013 respectively). Conclusion Our results suggest that filarial infection during pregnancy leads to an expansion of functionally active regulatory T cells that keep TH1 and TH17 in check.
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Affiliation(s)
- Ulysse Ateba-Ngoa
- Centre de Recherches Médicales de Lambaréné, BP 118, Lambaréné, Gabon
- Department of Parasitology, Leiden University Medical Center, Albinusdreef 2 2333 ZA Leiden, The Netherlands
- Institut für Tropenmedizin, Universität Tübingen, Wilhelmstraβe 27 D-72074 Tübingen, Germany
| | - Ghyslain Mombo-Ngoma
- Centre de Recherches Médicales de Lambaréné, BP 118, Lambaréné, Gabon
- Department of Parasitology, Leiden University Medical Center, Albinusdreef 2 2333 ZA Leiden, The Netherlands
- Institut für Tropenmedizin, Universität Tübingen, Wilhelmstraβe 27 D-72074 Tübingen, Germany
- Département de Parasitologie-Mycologie, Université des Sciences de la Santé, BP 4009, Libreville, Gabon
| | - Eva Zettlmeissl
- Institut für Tropenmedizin, Universität Tübingen, Wilhelmstraβe 27 D-72074 Tübingen, Germany
| | | | - Sanne de Jong
- Department of Parasitology, Leiden University Medical Center, Albinusdreef 2 2333 ZA Leiden, The Netherlands
| | - Pierre-Blaise Matsiegui
- Centre de Recherches Médicales de Lambaréné, BP 118, Lambaréné, Gabon
- Centre de Recherches Médicales de la Ngounié, Fougamou, Gabon
| | - Michael Ramharter
- Centre de Recherches Médicales de Lambaréné, BP 118, Lambaréné, Gabon
- Institut für Tropenmedizin, Universität Tübingen, Wilhelmstraβe 27 D-72074 Tübingen, Germany
- Department of Medicine I, Division of Infectious Diseases and Tropical Medicine, Medical University of Vienna, Währinger Gürtel 18–20, 1090 Vienna, Austria
| | - Peter G. Kremsner
- Centre de Recherches Médicales de Lambaréné, BP 118, Lambaréné, Gabon
- Institut für Tropenmedizin, Universität Tübingen, Wilhelmstraβe 27 D-72074 Tübingen, Germany
| | - Maria Yazdanbakhsh
- Centre de Recherches Médicales de Lambaréné, BP 118, Lambaréné, Gabon
- Department of Parasitology, Leiden University Medical Center, Albinusdreef 2 2333 ZA Leiden, The Netherlands
| | - Ayola Akim Adegnika
- Centre de Recherches Médicales de Lambaréné, BP 118, Lambaréné, Gabon
- Department of Parasitology, Leiden University Medical Center, Albinusdreef 2 2333 ZA Leiden, The Netherlands
- Institut für Tropenmedizin, Universität Tübingen, Wilhelmstraβe 27 D-72074 Tübingen, Germany
- * E-mail:
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9
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Labuda LA, de Jong SE, Meurs L, Amoah AS, Mbow M, Ateba-Ngoa U, van der Ham AJ, Knulst AC, Yazdanbakhsh M, Adegnika AA. Differences in innate cytokine responses between European and African children. PLoS One 2014; 9:e95241. [PMID: 24743542 PMCID: PMC3990610 DOI: 10.1371/journal.pone.0095241] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Accepted: 03/24/2014] [Indexed: 01/22/2023] Open
Abstract
Although differences in immunological responses between populations have been found in terms of vaccine efficacy, immune responses to infections and prevalence of chronic inflammatory diseases, the mechanisms responsible for these differences are not well understood. Therefore, innate cytokine responses mediated by various classes of pattern-recognition receptors including Toll-like receptors (TLR), C-type lectin receptors (CLRs) and nucleotide-binding oligomerisation domain-like receptors (NLRs) were compared between Dutch (European), semi-urban and rural Gabonese (African) children. Whole blood was stimulated for 24 hours and the pro-inflammatory tumor necrosis factor (TNF) and the anti-inflammatory/regulatory interleukin-10 (IL-10) cytokines in culture supernatant were measured by enzyme-linked immunosorbent assay (ELISA). Gabonese children had a lower pro-inflammatory response to poly(I:C) (TLR3 ligand), but a higher pro-inflammatory response to FSL-1 (TLR2/6 ligand), Pam3 (TLR2/1 ligand) and LPS (TLR4 ligand) compared to Dutch children. Anti-inflammatory responses to Pam3 were also higher in Gabonese children. Non-TLR ligands did not induce substantial cytokine production on their own. Interaction between various TLR and non-TLR receptors was further assessed, but no differences were found between the three populations. In conclusion, using a field applicable assay, significant differences were observed in cytokine responses between European and African children to TLR ligands, but not to non-TLR ligands.
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Affiliation(s)
- Lucja A. Labuda
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
- Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon
- Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
| | - Sanne E. de Jong
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
- Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon
| | - Lynn Meurs
- Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
| | - Abena S. Amoah
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
- Department of Parasitology, Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Accra, Ghana
| | - Moustapha Mbow
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
- Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
- Immunology Department of the Laboratory of Bacteriology and Virology of Aristide Le Dantec University Hospital, Dakar, Senegal
| | - Ulysse Ateba-Ngoa
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
- Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon
- Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
| | - Alwin J. van der Ham
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
| | - André C. Knulst
- Department of Dermatology/Allergology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Maria Yazdanbakhsh
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
| | - Ayola A. Adegnika
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
- Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon
- Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
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Kenguele HM, Adegnika AA, Nkoma AM, Ateba-Ngoa U, Mbong M, Zinsou J, Lell B, Verweij JJ. Impact of short-time urine freezing on the sensitivity of an established Schistosoma real-time PCR assay. Am J Trop Med Hyg 2014; 90:1153-5. [PMID: 24710612 DOI: 10.4269/ajtmh.14-0005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Urogenital schistosomiaisis is a serious public health problem in sub-Saharan Africa. In this study, we have updated an established real-time polymerase chain reaction (PCR) routinely used in our laboratory. Schistosoma genus-specific real-time PCR was performed on DNA isolated from 85 urine samples and pellets obtained after centrifugation without and after frozen storage. The results revealed that concentration by centrifugation of the urine samples and freezing of the samples before extracting DNA improves the sensitivity of the PCR.
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Affiliation(s)
- Hilaire M Kenguele
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Hôpital Albert Schweitzer Gabon; Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany; Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands; Laboratory for Medical Microbiology and Immunology, St. Elisabeth Hospital, Tilburg, The Netherlands
| | - Ayola A Adegnika
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Hôpital Albert Schweitzer Gabon; Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany; Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands; Laboratory for Medical Microbiology and Immunology, St. Elisabeth Hospital, Tilburg, The Netherlands
| | - Anne-Marie Nkoma
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Hôpital Albert Schweitzer Gabon; Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany; Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands; Laboratory for Medical Microbiology and Immunology, St. Elisabeth Hospital, Tilburg, The Netherlands
| | - Ulysse Ateba-Ngoa
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Hôpital Albert Schweitzer Gabon; Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany; Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands; Laboratory for Medical Microbiology and Immunology, St. Elisabeth Hospital, Tilburg, The Netherlands
| | - Mirabeau Mbong
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Hôpital Albert Schweitzer Gabon; Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany; Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands; Laboratory for Medical Microbiology and Immunology, St. Elisabeth Hospital, Tilburg, The Netherlands
| | - Jeannot Zinsou
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Hôpital Albert Schweitzer Gabon; Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany; Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands; Laboratory for Medical Microbiology and Immunology, St. Elisabeth Hospital, Tilburg, The Netherlands
| | - Bertrand Lell
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Hôpital Albert Schweitzer Gabon; Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany; Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands; Laboratory for Medical Microbiology and Immunology, St. Elisabeth Hospital, Tilburg, The Netherlands
| | - Jaco J Verweij
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Hôpital Albert Schweitzer Gabon; Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany; Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands; Laboratory for Medical Microbiology and Immunology, St. Elisabeth Hospital, Tilburg, The Netherlands
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Jepsen MPG, Jogdand PS, Singh SK, Esen M, Christiansen M, Issifou S, Hounkpatin AB, Ateba-Ngoa U, Kremsner PG, Dziegiel MH, Olesen-Larsen S, Jepsen S, Mordmüller B, Theisen M. The Malaria Vaccine Candidate GMZ2 Elicits Functional Antibodies in Individuals From Malaria Endemic and Non-Endemic Areas. J Infect Dis 2013; 208:479-88. [DOI: 10.1093/infdis/jit185] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Labuda LA, Ateba-Ngoa U, Feugap EN, Heeringa JJ, van der Vlugt LEPM, Pires RBA, Mewono L, Kremsner PG, van Zelm MC, Adegnika AA, Yazdanbakhsh M, Smits HH. Alterations in peripheral blood B cell subsets and dynamics of B cell responses during human schistosomiasis. PLoS Negl Trop Dis 2013; 7:e2094. [PMID: 23505586 PMCID: PMC3591311 DOI: 10.1371/journal.pntd.0002094] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Accepted: 01/23/2013] [Indexed: 11/19/2022] Open
Abstract
Antibody responses are thought to play an important role in control of Schistosoma infections, yet little is known about the phenotype and function of B cells in human schistosomiasis. We set out to characterize B cell subsets and B cell responses to B cell receptor and Toll-like receptor 9 stimulation in Gabonese schoolchildren with Schistosoma haematobium infection. Frequencies of memory B cell (MBC) subsets were increased, whereas naive B cell frequencies were reduced in the schistosome-infected group. At the functional level, isolated B cells from schistosome-infected children showed higher expression of the activation marker CD23 upon stimulation, but lower proliferation and TNF-α production. Importantly, 6-months after 3 rounds of praziquantel treatment, frequencies of naive B cells were increased, MBC frequencies were decreased and with the exception of TNF-α production, B cell responsiveness was restored to what was seen in uninfected children. These data show that S. haematobium infection leads to significant changes in the B cell compartment, both at the phenotypic and functional level. Schistosomiasis affects over 200 million people and especially children in developing countries. It causes general hyporesponsiveness of the immune system, which until now has predominantly been described for various T cell subsets as well as dendritic cells. B cells in this context have not yet been investigated. To address this question, we phenotyped B cell subsets present in peripheral blood from S. haematobium infected and uninfected schoolchildren living in an endemic area in Lambaréné, Gabon. Children with schistosomiasis had an increased frequency of various memory B cell subsets, including subsets associated with B cell exhaustion, and a concomitant decrease in naive B cells. To study the effect of Schistosoma infection on B cells in more detail we isolated peripheral blood B cells and found that B cells from infected children had a reduced capacity to proliferate and produce TNF-α in response to both B cell receptor and Toll-like receptor stimulation. These results provide new insights into the role of B cells in the host immune response to schistosomiasis and may provide a novel target for therapeutic strategies.
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Affiliation(s)
- Lucja A. Labuda
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon
- Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany
| | - Ulysse Ateba-Ngoa
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon
- Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany
| | - Eliane Ngoune Feugap
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon
- Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany
| | - Jorn J. Heeringa
- Department of Immunology, Erasmus MC, Rotterdam, The Netherlands
| | | | - Regina B. A. Pires
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon
- Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany
| | - Ludovic Mewono
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon
| | - Peter G. Kremsner
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon
- Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany
| | | | - Ayola A. Adegnika
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon
- Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany
| | - Maria Yazdanbakhsh
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
| | - Hermelijn H. Smits
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
- * E-mail:
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