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Fall AKDJ, Courtin D, Adamou R, Edslev S, Hansen A, Domingo N, Christiansen M, Adu B, Milet J, Garcia A, Theisen M, Migot-Nabias F, Dechavanne C. Fc Gamma Receptor IIIB NA1/NA2/SH Polymorphisms Are Associated with Malaria Susceptibility and Antibody Levels to P. falciparum Merozoite Antigens in Beninese Children. Int J Mol Sci 2022; 23:ijms232314882. [PMID: 36499205 PMCID: PMC9739279 DOI: 10.3390/ijms232314882] [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: 09/26/2022] [Revised: 11/21/2022] [Accepted: 11/22/2022] [Indexed: 11/29/2022] Open
Abstract
This paper aimed to investigate the influence of polymorphisms in the FCGR2A gene encoding R131H FcgRIIA variants and in the FCGR3B gene (108G > C, 114C > T, 194 A > G, 233C > A, 244 G > A and 316G > A) encoding FcgRIIIB-NA1, -NA2 and -SH variants on malaria susceptibility and antibody responses against P. falciparum merozoite antigens in Beninese children. An active malaria follow-up was conducted in infants from birth to 24 months of age in Allada, Benin. FCGR3B exon 3 was sequenced and FCGR2A exon 4 was genotyped. Antibodies directed to GLURP and MSP3 were quantified by ELISA. Association studies were performed using mixed-effect models. Individual carriage of FCGR3B 194 AA genotype was associated with a high number of malaria infections and a low level of IgG1 against MSP3 and GLURP-R0. High parasitemia and increased malaria infections were observed in infants carrying the FCGR3B*05 108C-114T-194A-233C-244A-316A haplotype. A reduced risk of malaria infections and low parasitemia were related to the carriages of the FCGR3B 108C-114T-194G-233C-244G-316A (FCGR3B*06), FCGR3B 108C−114T−194G−233A−244A−316A (FCGR3B*03 encoding for FcgRIIIB-SH) haplotypes and FCGR3B 297 TT genotype. Our results highlight the impact of FCGR3B polymorphisms on the individual susceptibility to malaria and antibody responses against MSP3 and GLURP in Beninese children.
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Affiliation(s)
- Abdou Khadre Dit Jadir Fall
- Institut de Recherche pour le Développement, UMR 261 MERIT, Université Paris Cité, 75006 Paris, France
- Correspondence:
| | - David Courtin
- Institut de Recherche pour le Développement, UMR 261 MERIT, Université Paris Cité, 75006 Paris, France
| | - Rafiou Adamou
- Institut de Recherche pour le Développement, UMR 261 MERIT, Université Paris Cité, 75006 Paris, France
- Centre d’Etude et de Recherche sur les Pathologies Associées à la Grossesse et à l’Enfance, Cotonou 00229, Benin
| | - Sofie Edslev
- Centre for Medical Parasitology, Department of International Health, Immunology and Microbiology, Department of Infectious Diseases, University of Copenhagen, Copenhagen University Hospital, Rigshospitalet, 2300 Copenhagen, Denmark
- Bacteria, Parasites, and Fungi, Statens Serum Institut, Artillerivej 5, 2300 Copenhagen, Denmark
| | - Anita Hansen
- Centre for Medical Parasitology, Department of International Health, Immunology and Microbiology, Department of Infectious Diseases, University of Copenhagen, Copenhagen University Hospital, Rigshospitalet, 2300 Copenhagen, Denmark
| | - Nadia Domingo
- Institut de Recherche pour le Développement, UMR 261 MERIT, Université Paris Cité, 75006 Paris, France
- Centre d’Etude et de Recherche sur les Pathologies Associées à la Grossesse et à l’Enfance, Cotonou 00229, Benin
| | - Michael Christiansen
- Department for Congenital Disorders, Statens Serum Institut, 2300 Copenhagen, Denmark
| | - Bright Adu
- Centre for Medical Parasitology, Department of International Health, Immunology and Microbiology, Department of Infectious Diseases, University of Copenhagen, Copenhagen University Hospital, Rigshospitalet, 2300 Copenhagen, Denmark
- Department of Immunology, Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Accra P.O. Box LG 581, Ghana
| | - Jacqueline Milet
- Institut de Recherche pour le Développement, UMR 261 MERIT, Université Paris Cité, 75006 Paris, France
| | - André Garcia
- Institut de Recherche pour le Développement, UMR 261 MERIT, Université Paris Cité, 75006 Paris, France
| | - Michael Theisen
- Centre for Medical Parasitology, Department of International Health, Immunology and Microbiology, Department of Infectious Diseases, University of Copenhagen, Copenhagen University Hospital, Rigshospitalet, 2300 Copenhagen, Denmark
- Department for Congenital Disorders, Statens Serum Institut, 2300 Copenhagen, Denmark
| | - Florence Migot-Nabias
- Institut de Recherche pour le Développement, UMR 261 MERIT, Université Paris Cité, 75006 Paris, France
| | - Célia Dechavanne
- Institut de Recherche pour le Développement, UMR 261 MERIT, Université Paris Cité, 75006 Paris, France
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Natama HM, Rovira-Vallbona E, Krit M, Guetens P, Sorgho H, Somé MA, Traoré-Coulibaly M, Valéa I, Mens PF, Schallig HDFH, Berkvens D, Kestens L, Tinto H, Rosanas-Urgell A. Genetic variation in the immune system and malaria susceptibility in infants: a nested case-control study in Nanoro, Burkina Faso. Malar J 2021; 20:94. [PMID: 33593344 PMCID: PMC7885350 DOI: 10.1186/s12936-021-03628-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 02/03/2021] [Accepted: 02/05/2021] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Genetic polymorphisms in the human immune system modulate susceptibility to malaria. However, there is a paucity of data on the contribution of immunogenetic variants to malaria susceptibility in infants, who present differential biological features related to the immaturity of their adaptive immune system, the protective effect of maternal antibodies and fetal haemoglobin. This study investigated the association between genetic variation in innate immune response genes and malaria susceptibility during the first year of life in 656 infants from a birth cohort survey performed in Nanoro, Burkina Faso. METHODS Seventeen single nucleotide polymorphisms (SNPs) in 11 genes of the immune system previously associated with different malaria phenotypes were genotyped using TaqMan allelic hybridization assays in a Fluidigm platform. Plasmodium falciparum infection and clinical disease were documented by active and passive case detection. Case-control association analyses for both alleles and genotypes were carried out using univariate and multivariate logistic regression. For cytokines showing significant SNP associations in multivariate analyses, cord blood supernatant concentrations were measured by quantitative suspension array technology (Luminex). RESULTS Genetic variants in IL-1β (rs1143634) and FcγRIIA/CD32 (rs1801274)-both in allelic, dominant and co-dominant models-were significantly associated with protection from both P. falciparum infection and clinical malaria. Furthermore, heterozygote individuals with rs1801274 SNP in FcγRIIA/CD32 showed higher IL-1RA levels compared to wild-type homozygotes (P = 0.024), a cytokine whose production is promoted by the binding of IgG immune complexes to Fcγ receptors on effector immune cells. CONCLUSIONS These findings indicate that genetic polymorphisms in genes driving innate immune responses are associated to malaria susceptibility during the first year of life, possibly by modulating production of inflammatory mediators.
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Affiliation(s)
- Hamatandi Magloire Natama
- Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium.
- Unité de Recherche Clinique de Nanoro, Institut de Recherche en Sciences de La Santé, Nanoro, Burkina Faso.
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium.
| | | | - Meryam Krit
- Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
| | - Pieter Guetens
- Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
| | - Hermann Sorgho
- Unité de Recherche Clinique de Nanoro, Institut de Recherche en Sciences de La Santé, Nanoro, Burkina Faso
| | - M Athanase Somé
- Unité de Recherche Clinique de Nanoro, Institut de Recherche en Sciences de La Santé, Nanoro, Burkina Faso
| | - Maminata Traoré-Coulibaly
- Unité de Recherche Clinique de Nanoro, Institut de Recherche en Sciences de La Santé, Nanoro, Burkina Faso
| | - Innocent Valéa
- Unité de Recherche Clinique de Nanoro, Institut de Recherche en Sciences de La Santé, Nanoro, Burkina Faso
| | - Petra F Mens
- Department of Medical Microbiology-Parasitology Unit, Academic Medical Centre, Amsterdam University Medical Centres, Amsterdam, The Netherlands
| | - Henk D F H Schallig
- Department of Medical Microbiology-Parasitology Unit, Academic Medical Centre, Amsterdam University Medical Centres, Amsterdam, The Netherlands
| | - Dirk Berkvens
- Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
| | - Luc Kestens
- Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Halidou Tinto
- Unité de Recherche Clinique de Nanoro, Institut de Recherche en Sciences de La Santé, Nanoro, Burkina Faso
- Centre Muraz, Bobo Dioulasso, Burkina Faso
| | - Anna Rosanas-Urgell
- Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium.
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Fall AKDJ, Dechavanne C, Sabbagh A, Guitard E, Milet J, Garcia A, Dugoujon JM, Courtin D, Migot-Nabias F. Susceptibility to Plasmodium falciparum Malaria: Influence of Combined Polymorphisms of IgG3 Gm Allotypes and Fc Gamma Receptors IIA, IIIA, and IIIB. Front Immunol 2020; 11:608016. [PMID: 33424858 PMCID: PMC7786284 DOI: 10.3389/fimmu.2020.608016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 11/13/2020] [Indexed: 02/04/2023] Open
Abstract
The binding of immunoglobulin (Ig) to Fc gamma receptors (FcgR) at the immune cell surface is an important step to initiate immunological defense against malaria. However, polymorphisms in receptors and/or constant regions of the IgG heavy chains may modulate this binding. Here, we investigated whether polymorphisms located in FcgR and constant regions of the heavy chain of IgG are associated with susceptibility to P. falciparum malaria. For this purpose, a clinical and parasitological follow-up on malaria was conducted among 656 infants in southern Benin. G3m allotypes (from total IgG3) were determined by a serological method of hemagglutination inhibition. FcgRIIA 131R/H and FcgRIIIA 176F/V genotypes were determined using the TaqMan method and FcgRIIIB NA1/NA2 genotypes were assessed by polymerase chain reaction using allele-specific primers. Association analyses between the number of malaria infections during the follow-up and polymorphisms in IgG G3m allotypes and FcgR were studied independently by zero inflated binomial negative regression. The influence of combinations of G3m allotypes and FcgRIIA/FcgRIIIA/FcgRIIIB polymorphisms on the number of P. falciparum infections, and their potential interaction with environmental exposure to malaria was assessed by using the generalized multifactor dimensionality reduction (GMDR) method. Results showed that individual carriage of G3m24 single allotype and of G3m5,6,10,11,13,14,24 phenotype was independently associated with a high risk of malaria infection. A risk effect for G3m6 was observed only under high environmental exposure. FcgRIIIA 176VV single genotype and combined carriage of FcgRIIA 131RH/FcgRIIIA 176VV/FcgRIIIB NA1NA2, FcgRIIA 131HH/FcgRIIIA 176FF/FcgRIIIB NA1NA1, FcgRIIA 131HH/FcgRIIIA 176VV/FcgRIIIB NA2NA2 and FcgRIIA 131HH/FcgRIIIA 176VV/FcgRIIIB NA1NA2 genotypes were related to a high number of malaria infections. The risk was accentuated for FcgRIIIA 176VV when considering the influence of environmental exposure to malaria. Finally, the GMDR analysis including environmental exposure showed strengthened associations with a malaria risk when FcgRIIA/FcgRIIIA/FcgRIIIB genotypes were combined to G3m5,6,11,24 and G3m5,6,10,11,13,15,24 phenotypes or G3m10 and G3m13 single allotypes. Our results highlight the relevance of studying IgG heavy chain and FcgR polymorphisms, independently as well as in combination, in relation to the individual susceptibility to P. falciparum infection. The intensity of individual exposure to mosquito bites was demonstrated to impact the relationships found.
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Affiliation(s)
| | - Celia Dechavanne
- Université de Paris, Institut de Recherche pour le Développement (IRD), UMR 261 MERIT, Paris, France
| | - Audrey Sabbagh
- Université de Paris, Institut de Recherche pour le Développement (IRD), UMR 261 MERIT, Paris, France
| | - Evelyne Guitard
- CNRS UMR 5288 Laboratoire d'Anthropologie Moléculaire et d'Imagerie de Synthèse (AMIS), Université Paul Sabatier Toulouse III, Toulouse, France
| | - Jacqueline Milet
- Université de Paris, Institut de Recherche pour le Développement (IRD), UMR 261 MERIT, Paris, France
| | - André Garcia
- Université de Paris, Institut de Recherche pour le Développement (IRD), UMR 261 MERIT, Paris, France
| | - Jean-Michel Dugoujon
- CNRS UMR 5288 Laboratoire d'Anthropologie Moléculaire et d'Imagerie de Synthèse (AMIS), Université Paul Sabatier Toulouse III, Toulouse, France
| | - David Courtin
- Université de Paris, Institut de Recherche pour le Développement (IRD), UMR 261 MERIT, Paris, France
| | - Florence Migot-Nabias
- Université de Paris, Institut de Recherche pour le Développement (IRD), UMR 261 MERIT, Paris, France
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Amiah MA, Ouattara A, Okou DT, N'Guetta SPA, Yavo W. Polymorphisms in Fc Gamma Receptors and Susceptibility to Malaria in an Endemic Population. Front Immunol 2020; 11:561142. [PMID: 33281811 PMCID: PMC7689034 DOI: 10.3389/fimmu.2020.561142] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 10/05/2020] [Indexed: 11/13/2022] Open
Abstract
Repeated infections by Plasmodium falciparum result in a humoral response that could reduce disease symptoms and prevent the development of clinical malaria. The principal mechanism underlying this humoral response is that immunoglobulin G (IgG) binds directly to the parasites, thus causing their neutralization. However, the action of antibodies alone is not always sufficient to eliminate pathogens from an organism. One key element involved in the recognition of IgG that plays a crucial role in the destruction of the parasites responsible for spreading malaria is the family of Fc gamma receptors. These receptors are expressed on the surface of immune cells. Several polymorphisms have been detected in the genes encoding these receptors, associated with susceptibility or resistance to malaria in different populations. In this review, we describe identified polymorphisms within the family of Fc gamma receptors and the impact of these variations on the response of a host to infection as well as provide new perspectives for the design of an effective vaccine for malaria.
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Affiliation(s)
- Mireille Ahou Amiah
- Malaria Research and Control Center, National Public Health Institute, Abidjan, Côte d'Ivoire.,Laboratory of Genetics, Unité de Formation et de Recherche (UFR) BIOSCIENCES, Félix Houphouët-Boigny University, Abidjan, Côte d'Ivoire
| | - Amed Ouattara
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - David Tea Okou
- Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, United States
| | - Simon-Pierre Assanvo N'Guetta
- Laboratory of Genetics, Unité de Formation et de Recherche (UFR) BIOSCIENCES, Félix Houphouët-Boigny University, Abidjan, Côte d'Ivoire
| | - William Yavo
- Malaria Research and Control Center, National Public Health Institute, Abidjan, Côte d'Ivoire.,Department of Parasitology and Mycology, Faculty of Pharmacy, Félix Houphouët-Boigny University, Abidjan, Côte d'Ivoire
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Kisia LE, Kempaiah P, Anyona SB, Munde EO, Achieng AO, Ong'echa JM, Lambert CG, Chelimo K, Ouma C, Perkins DJ, Raballah E. Genetic variation in interleukin-7 is associated with a reduced erythropoietic response in Kenyan children infected with Plasmodium falciparum. BMC MEDICAL GENETICS 2019; 20:140. [PMID: 31420016 PMCID: PMC6698010 DOI: 10.1186/s12881-019-0866-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 07/26/2019] [Indexed: 01/07/2023]
Abstract
BACKGROUND Severe malarial anemia (SMA) is a leading cause of malaria-related morbidity and mortality in children. The genetic factors that influence development of SMA and inefficient erythropoiesis, a central pathogenic feature of SMA, are only partially understood. METHODS We performed a pilot Genome-wide Association Study (GWAS) on children with Plasmodium falciparum. The GWAS was performed using the Illumina® Infinium® HD Super Assay in conjunction with Illumina's® Human Omni2.5-8v1 BeadChip (with > 2.45 M markers). Data were analyzed using single SNP logistic regression analysis with an additive model of inheritance controlling for covariates. Results from our pilot global genomics study identified that variation in interleukin (IL)-7 was associated with enhanced risk of SMA. To validate this finding, we investigated the relationship between genotypes and/or haplotypes of two single nucleotide polymorphisms (SNPs) in IL7 [72194 T/C and - 2440 A/G] and susceptibility to both SMA and inefficient erythropoiesis [i.e., reticulocyte production index (RPI) < 2.0 in anemic children (Hb < 11.0 g/dL). Children presenting with P. falciparum malaria (< 3 years, n = 883) were stratified into two groups: Uncomplicated malaria (UM, n = 718) and SMA (n = 165). RESULTS Regression modeling, controlling for anemia-related confounders, revealed that carriage of the TC genotype at position 72194 T/C was associated with enhanced susceptibility to inefficient erythropoiesis (OR = 1.90; 95% CI 1.09-3.30; P = 0.02) as was homozygous CC (OR 5.14; 95% CI = 1.20-21.99; P = 0.03). Consistent with this finding, individuals with the CA (72194C/-2440A) haplotype had an increased risk of inefficient erythropoiesis (OR = 1.90; 95% CI = 1.10-3.30; P = 0.02), whereas TA haplotype carriers had marginal protection against inefficient erythropoiesis (OR = 0.24; 95% CI = 0.06-1.21; P = 0.05). These observations were supported by Cochran-Armitage trend test for inefficient erythropoiesis (CA > TA > CG; P < 0.01). Although none of the genotype and/or haplotypic variants were significantly associated with SMA, the direction of the risk profiles were consistent with the erythropoiesis results. CONCLUSION Taken together, variation in IL7 is associated with erythropoietic responses in children with falciparum malaria, a central physiological feature contributing to development of SMA.
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Affiliation(s)
- Lily E Kisia
- Department of Biomedical Sciences and Technology, School of Public Health and Community Development, Maseno University, Maseno, Kenya.,University of New Mexico/KEMRI Laboratories of Parasitic and Viral Diseases, Kisumu, Kenya
| | - Prakasha Kempaiah
- Department of Internal Medicine, Center for Global Health, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Samuel B Anyona
- University of New Mexico/KEMRI Laboratories of Parasitic and Viral Diseases, Kisumu, Kenya
| | - Elly O Munde
- Department of Biomedical Sciences and Technology, School of Public Health and Community Development, Maseno University, Maseno, Kenya.,University of New Mexico/KEMRI Laboratories of Parasitic and Viral Diseases, Kisumu, Kenya
| | - Angela O Achieng
- Department of Biomedical Sciences and Technology, School of Public Health and Community Development, Maseno University, Maseno, Kenya.,University of New Mexico/KEMRI Laboratories of Parasitic and Viral Diseases, Kisumu, Kenya
| | - John M Ong'echa
- University of New Mexico/KEMRI Laboratories of Parasitic and Viral Diseases, Kisumu, Kenya
| | - Christophe G Lambert
- Department of Internal Medicine, Center for Global Health, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Kiprotich Chelimo
- Department of Biomedical Sciences and Technology, School of Public Health and Community Development, Maseno University, Maseno, Kenya
| | - Collins Ouma
- Department of Biomedical Sciences and Technology, School of Public Health and Community Development, Maseno University, Maseno, Kenya.,University of New Mexico/KEMRI Laboratories of Parasitic and Viral Diseases, Kisumu, Kenya
| | - Douglas J Perkins
- University of New Mexico/KEMRI Laboratories of Parasitic and Viral Diseases, Kisumu, Kenya.,Department of Internal Medicine, Center for Global Health, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Evans Raballah
- University of New Mexico/KEMRI Laboratories of Parasitic and Viral Diseases, Kisumu, Kenya. .,Department of Medical Laboratory Sciences, School of Public Health, Biomedical Sciences and Technology, Masinde Muliro University of Science and Technology, P.O. Box 190-50100, Kakamega, Kenya.
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6
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Achieng AO, Hengartner NW, Raballah E, Cheng Q, Anyona SB, Lauve N, Guyah B, Foo-Hurwitz I, Ong'echa JM, McMahon BH, Ouma C, Lambert CG, Perkins DJ. Integrated OMICS platforms identify LAIR1 genetic variants as novel predictors of cross-sectional and longitudinal susceptibility to severe malaria and all-cause mortality in Kenyan children. EBioMedicine 2019; 45:290-302. [PMID: 31278068 PMCID: PMC6642287 DOI: 10.1016/j.ebiom.2019.06.043] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 06/19/2019] [Accepted: 06/20/2019] [Indexed: 01/05/2023] Open
Abstract
Background Severe malarial anaemia (SMA) is a leading cause of childhood mortality in holoendemic Plasmodium falciparum regions. Methods To gain an improved understanding of SMA pathogenesis, whole genome and transcriptome profiling was performed in Kenyan children (n = 144, 3–36 months) with discrete non-SMA and SMA phenotypes. Leukocyte associated immunoglobulin like receptor 1 (LAIR1) emerged as a predictor of susceptibility to SMA (P < 1 × 10−2, OR: 0.44–1.37), and was suppressed in severe disease (−1.69-fold, P = 0.004). To extend these findings, the relationship between LAIR1 polymorphisms [rs6509867 (16231C>A); rs2287827 (18835G>A)] and clinical outcomes were investigated in individuals (n = 1512, <5 years) at enrolment and during a 36-month longitudinal follow-up. Findings Inheritance of the 16,231 recessive genotype (AA) increased susceptibility to SMA at enrolment (OR = 1.903, 95%CI: 1.252–2.891, P = 0.003), and longitudinally (RR = 1.527, 95%CI: 1.119–2.083, P = 0.008). Carriage of the 18,835 GA genotype protected against SMA cross-sectionally (OR = 0.672, 95%CI: 0.480–0.9439, P = 0.020). Haplotype carriage (C16231A/G18835A) also altered cross-sectional susceptibility to SMA: CG (OR = 0.717, 95%CI: 0.527–0.9675, P = 0.034), CA (OR = 0.745, 95%CI: 0.536–1.036, P = 0.080), and AG (OR = 1.641, 95%CI: 1.160–2.321, P = 0.005). Longitudinally, CA carriage was protective against SMA (RR = 0.715, 95%CI: 0.554–0.923, P = 0.010), while AG carriage had an additive effect on enhanced SMA risk (RR = 1.283, 95%CI: 1.057–1.557, P = 0.011). Variants that protected against SMA had elevated LAIR1 transcripts, while those with enhanced risk had lower expression (P < 0.05). Inheritance of 18,835 GA reduced all-cause mortality by 44.8% (HR = 0.552, 95%CI: 0.329–0.925, P = 0.024), while AG haplotype carriage increased susceptibility by 68% (HR = 1.680, 95%CI: 1.020–2.770, P = 0.040). Interpretation These findings suggest LAIR1 is important for modulating susceptibility to SMA and all-cause childhood mortality.
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Affiliation(s)
- Angela O Achieng
- University of New Mexico-Kenya Global Health Programs, Kisumu and Siaya, Kenya; Department of Biomedical Sciences and Technology, School of Public Health and Community Development, Maseno University, Maseno, Kenya
| | - Nicolas W Hengartner
- Theoretical Biology and Biophysics Group, Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - Evans Raballah
- University of New Mexico-Kenya Global Health Programs, Kisumu and Siaya, Kenya; Department of Medical Laboratory Sciences, School of Public Health Biomedical Sciences and Technology, Masinde Muliro University of Science and Technology, Kakamega, Kenya
| | - Qiuying Cheng
- University of New Mexico, Center for Global Health, Department of Internal Medicine, NM, USA
| | - Samuel B Anyona
- University of New Mexico-Kenya Global Health Programs, Kisumu and Siaya, Kenya; Department of Medical Biochemistry, School of Medicine, Maseno University, Maseno, Kenya
| | - Nick Lauve
- University of New Mexico, Center for Global Health, Department of Internal Medicine, NM, USA
| | - Bernard Guyah
- Department of Biomedical Sciences and Technology, School of Public Health and Community Development, Maseno University, Maseno, Kenya
| | - Ivy Foo-Hurwitz
- University of New Mexico, Center for Global Health, Department of Internal Medicine, NM, USA
| | - John M Ong'echa
- Kenya Medical Research Institute, Centre for Global Health Research, Kisumu, Kenya
| | - Benjamin H McMahon
- Theoretical Biology and Biophysics Group, Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - Collins Ouma
- University of New Mexico-Kenya Global Health Programs, Kisumu and Siaya, Kenya; Department of Biomedical Sciences and Technology, School of Public Health and Community Development, Maseno University, Maseno, Kenya
| | - Christophe G Lambert
- University of New Mexico, Center for Global Health, Department of Internal Medicine, NM, USA
| | - Douglas J Perkins
- University of New Mexico-Kenya Global Health Programs, Kisumu and Siaya, Kenya; University of New Mexico, Center for Global Health, Department of Internal Medicine, NM, USA.
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7
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Achieng AO, Guyah B, Cheng Q, Ong'echa JM, Ouma C, Lambert CG, Perkins DJ. Molecular basis of reduced LAIR1 expression in childhood severe malarial anaemia: Implications for leukocyte inhibitory signalling. EBioMedicine 2019; 45:278-289. [PMID: 31257148 PMCID: PMC6642411 DOI: 10.1016/j.ebiom.2019.06.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 06/18/2019] [Accepted: 06/20/2019] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Leukocyte-associated immunoglobulin like receptor-1 (LAIR1) is a transmembrane inhibitory receptor that influences susceptibility to a myriad of inflammatory diseases. Our recent investigations of severe malarial anaemia (SMA) pathogenesis in Kenyan children discovered that novel LAIR1 genetic variants which were associated with decreased LAIR1 transcripts enhanced the longitudinal risk of SMA and all-cause mortality. METHODS To characterize the molecular mechanism(s) responsible for altered LAIR1 signalling in severe malaria, we determined LAIR1 transcripts and protein, sLAIR1, sLAIR2, and complement component 1q (C1q) in children with malarial anaemia, followed by a series of in vitro experiments investigating the LAIR1 signalling cascade. FINDINGS Kenyan children with SMA had elevated circulating levels of soluble LAIR1 (sLAIR1) relative to non-SMA (1.69-fold P < .0001). The LAIR1 antagonist, sLAIR2, was also elevated in the circulation of children with SMA (1.59 fold-change, P < .0001). There was a positive correlation between sLAIR1 and sLAIR2 (ρ = 0.741, P < .0001). Conversely, circulating levels of complement component 1q (C1q), a LAIR1 natural ligand, were lower in SMA (-1.21-fold P = .048). These in vivo findings suggest that reduced membrane-bound LAIR1 expression in SMA is associated with elevated production of sLAIR1, sLAIR2 (antagonist), and limited C1q (agonist) availability. Since reduced LAIR1 transcripts in SMA were associated with increased acquisition of haemozoin (PfHz) by monocytes (P = .028), we explored the relationship between acquisition of intraleukocytic PfHz, LAIR1 expression, and subsequent impacts on leukocyte signalling in cultured PBMCs from malaria-naïve donors stimulated with physiological concentrations of PfHz (10 μg/mL). Phagocytosis of PfHz reduced LAIR1 transcript and protein expression in a time-dependent manner (P < .050), and inhibited LAIR1 signalling through decreased phosphorylation of LAIR1 (P < .0001) and SH2-domain containing phosphatase-1 (SHP-1) (P < .001). This process was associated with NF-κB activation (P < .0001) and enhanced production of IL-6, IL-1β, and TNF-α (all P < .0001). INTERPRETATION Collectively, these findings demonstrate that SMA is characterized by reduced LAIR1 transmembrane expression, reduced C1q, and enhanced production of sLAIR1 and sLAIR2, molecular events which can promote enhanced production of cytokines that contribute to the pathogenesis of SMA. These investigations are important for discovering immune checkpoints that could be future targets of immunotherapy to improve disease outcomes.
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Affiliation(s)
- Angela O Achieng
- University of New Mexico-Kenya Global Health Programs, Kisumu and Siaya, Kenya; Department of Biomedical Sciences and Technology, School of Public Health and Community Development, Maseno University, Maseno, Kenya
| | - Bernard Guyah
- Department of Biomedical Sciences and Technology, School of Public Health and Community Development, Maseno University, Maseno, Kenya
| | - Qiuying Cheng
- University of New Mexico, Center for Global Health, Department of Internal Medicine, NM, USA
| | - John M Ong'echa
- Kenya Medical Research Institute, Centre for Global Health Research, Kisumu, Kenya
| | - Collins Ouma
- University of New Mexico-Kenya Global Health Programs, Kisumu and Siaya, Kenya; Department of Biomedical Sciences and Technology, School of Public Health and Community Development, Maseno University, Maseno, Kenya
| | - Christophe G Lambert
- University of New Mexico, Center for Global Health, Department of Internal Medicine, NM, USA
| | - Douglas J Perkins
- University of New Mexico-Kenya Global Health Programs, Kisumu and Siaya, Kenya; University of New Mexico, Center for Global Health, Department of Internal Medicine, NM, USA.
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Munde EO, Okeyo WA, Raballah E, Anyona SB, Were T, Ong'echa JM, Perkins DJ, Ouma C. Association between Fcγ receptor IIA, IIIA and IIIB genetic polymorphisms and susceptibility to severe malaria anemia in children in western Kenya. BMC Infect Dis 2017; 17:289. [PMID: 28427365 PMCID: PMC5397742 DOI: 10.1186/s12879-017-2390-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 04/07/2017] [Indexed: 01/22/2023] Open
Abstract
Background Naturally-acquired immunity to Plasmodium falciparum malaria develops after several episodes of infection. Fc gamma receptors (FcγRs) bind to immunoglobulin G (IgG) antibodies and mediate phagocytosis of opsonized microbes, thereby, linking humoral and cellular immunity. FcγR polymorphisms influence binding affinity to IgGs and consequently, can influence clinical malaria outcomes. Specifically, variations in FcγRIIA -131Arg/His, FcγRIIIA-176F/V and FcγRIIIB-NA1/NA2 modulate immune responses through altered binding preferences to IgGs and immune complexes. Differential binding, in turn, changes ability of immune cells to respond to infection through production of inflammatory mediators during P. falciparum infection. Methods We determined the association between haplotypes of FcγRIIA-131Arg/His, FcγRIIIA-176F/V and FcγRIIIB-NA1/NA2 variants and severe malarial anemia (SMA; hemoglobin < 6.0 g/dL, any density parasitemia) in children (n = 274; aged 6–36 months) presenting for their first hospital visit with P. falciparum malaria in a holoendemic transmission region of western Kenya. FcγRIIA-131Arg/His and FcγRIIIA-176F/V genotypes were determined using TaqMan® SNP genotyping, while FcγRIIIBNA1/NA2 genotypes were determined using restriction fragment length polymorphism. Hematological and parasitological indices were measured in all study participants. Results Carriage of FcγRIIA-131Arg/FcγRIIIA-176F/FcγRIIIBNA2 haplotype was associated with susceptibility to SMA (OR = 1.70; 95% CI; 1.02–2.93; P = 0.036), while the FcγRIIA-131His/ FcγRIIIA-176F/ FcγRIIIB NA1 haplotype was marginally associated with enhanced susceptibility to SMA (OR: 1.80, 95% CI; 0.98–3.30, P = 0.057) and higher levels of parasitemia (P = 0.009). Individual genotypes of FcγRIIA-131Arg/His, FcγRIIIA-176F/V and FcγRIIIB-NA1/NA2 were not associated with susceptibility to SMA. Conclusion The study revealed that haplotypes of FcγRs are important in conditioning susceptibility to SMA in immune-naive children from P. falciparum holoendemic region of western Kenya. Electronic supplementary material The online version of this article (doi:10.1186/s12879-017-2390-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Elly O Munde
- Department of Biomedical Sciences and Technology, School of Public Health and Community Development, Maseno University, Maseno, Kenya.,University of New Mexico/KEMRI Laboratories of Parasitic and Viral Diseases, Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya
| | - Winnie A Okeyo
- Department of Biomedical Sciences and Technology, School of Public Health and Community Development, Maseno University, Maseno, Kenya
| | - Evans Raballah
- University of New Mexico/KEMRI Laboratories of Parasitic and Viral Diseases, Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya.,Department of Medical Laboratory Science, School of Public Health, Biomedical Sciences and Technology, Masinde Muliro University of Science and Technology, Kakamega, Kenya
| | - Samuel B Anyona
- Department of Medical Biochemistry, School of Medicine, Maseno University, Maseno, Kenya
| | - Tom Were
- Department of Medical Laboratory Science, School of Public Health, Biomedical Sciences and Technology, Masinde Muliro University of Science and Technology, Kakamega, Kenya
| | - John M Ong'echa
- University of New Mexico/KEMRI Laboratories of Parasitic and Viral Diseases, Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya.,Department of Internal Medicine, Centre for Global Health, University of New Mexico, Health Sciences Centre, Albuquerque, New Mexico, USA
| | - Douglas J Perkins
- University of New Mexico/KEMRI Laboratories of Parasitic and Viral Diseases, Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya.,Department of Internal Medicine, Centre for Global Health, University of New Mexico, Health Sciences Centre, Albuquerque, New Mexico, USA
| | - Collins Ouma
- Department of Biomedical Sciences and Technology, School of Public Health and Community Development, Maseno University, Maseno, Kenya. .,Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya. .,African Institute for Development Policy, Nairobi, Kenya.
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9
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Raballah E, Kempaiah P, Karim Z, Orinda GO, Otieno MF, Perkins DJ, Ong’echa JM. CD4 T-cell expression of IFN-γ and IL-17 in pediatric malarial anemia. PLoS One 2017; 12:e0175864. [PMID: 28426727 PMCID: PMC5398558 DOI: 10.1371/journal.pone.0175864] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 03/31/2017] [Indexed: 12/14/2022] Open
Abstract
In Plasmodium falciparum holoendemic transmission regions of western Kenya, life-threatening pediatric malaria manifests primarily as severe malarial anemia (SMA, Hb≤6.0 g/dL with any density parasitemia). To determine the role that CD4+ T-cell-driven inflammatory responses have in the pathogenesis of SMA, peripheral CD4+ T-cell populations and their intracellular production of pro-inflammatory cytokines (IFN-γ and IL-17) were characterized in children aged 12–36 months of age stratified into two groups: non-severe malarial anemia (non-SMA, Hb≥6.0 g/dL, n = 50) and SMA (n = 39). In addition, circulating IFN-γ and IL-17 were measured as part of a Cytokine 25-plex Antibody Bead Kit, Human (BioSource™ International). Children with SMA had higher overall proportions of circulating lymphocytes (P = 0.003) and elevated proportions of lymphocytes expressing IFN-γ (P = 0.014) and comparable IL-17 (P = 0.101). In addition, SMA was characterized by decreased memory-like T-cells (CD4+CD45RA-) expressing IL-17 (P = 0.009) and lower mean fluorescence intensity in memory-like CD4+ T-cells for both IFN-γ (P = 0.063) and IL-17 (P = 0.006). Circulating concentrations of IFN-γ were higher in children with SMA (P = 0.009), while IL-17 levels were comparable between the groups (P = 0.164). Furthermore, circulating levels of IFN-γ were negatively correlated with IL-17 levels in both groups of children (SMA: r = -0.610, P = 0.007; and non-SMA: r = -0.516, P = 0.001), while production of both cytokines by lymphocytes were positively correlated (SMA: r = 0.349, P = 0.037; and non-SMA: r = 0.475, P = 0.001). In addition, this correlation was only maintained by the memory-like CD4+ T cells (r = 0.365, P = 0.002) but not the naïve-like CD4+ T cells. However, circulating levels of IFN-γ were only associated with naïve-like CD4+ T cells producing IFN-γ (r = 0.547, P = 0.028), while circulating levels of IL-17 were not associated with any of the cell populations. Taken together, these results suggest that enhanced severity of malarial anemia is associated with higher overall levels of circulating lymphocytes, enhanced intracellular production of IFN-γ by peripheral lymphocytes and high circulating IFN-γ levels. In addition, the observed inverse relationship between the circulating levels of IFN-γ and IL-17 together with the reduction in the levels of memory-like CD4+ T cells expressing IL-17 in children with SMA may suggest possible relocation of these cells in the deeper tissues for their pathological effect.
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Affiliation(s)
- Evans Raballah
- University of New Mexico Laboratories of Parasitic and Viral Diseases, Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya
- Department of Medical Laboratory Sciences, Masinde Muliro University of Science and Technology, Kakamega, Kenya
- Department of Biochemistry and Biotechnology, Kenyatta University, Nairobi, Kenya
| | - Prakasha Kempaiah
- Center for Global Health, Department of Internal Medicine, University of New Mexico, Health Sciences Centre, Albuquerque, NM, United States of America
| | - Zachary Karim
- Center for Global Health, Department of Internal Medicine, University of New Mexico, Health Sciences Centre, Albuquerque, NM, United States of America
| | - George O. Orinda
- Department of Biochemistry and Biotechnology, Kenyatta University, Nairobi, Kenya
| | - Michael F. Otieno
- Department of Medical Laboratory Sciences, Kenyatta University, Nairobi, Kenya
| | - Douglas J. Perkins
- University of New Mexico Laboratories of Parasitic and Viral Diseases, Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya
- Center for Global Health, Department of Internal Medicine, University of New Mexico, Health Sciences Centre, Albuquerque, NM, United States of America
| | - John Michael Ong’echa
- University of New Mexico Laboratories of Parasitic and Viral Diseases, Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya
- * E-mail:
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10
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Cherif M, Amoako-Sakyi D, Dolo A, Pearson JO, Gyan B, Obiri-Yeboah D, Nebie I, Sirima SB, Doumbo O, Troye-Blomberg M, Bakary M. Distribution of FcγR gene polymorphisms among two sympatric populations in Mali: differing allele frequencies, associations with malariometric indices and implications for genetic susceptibility to malaria. Malar J 2016; 15:29. [PMID: 26785902 PMCID: PMC4717667 DOI: 10.1186/s12936-015-1082-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 12/31/2015] [Indexed: 11/18/2022] Open
Abstract
Background Genetic polymorphisms in the complex gene cluster encoding human Fc-gamma receptors (FcγRs) may influence malaria susceptibility and pathogenesis. Studying genetic susceptibility to malaria is ideal among sympatric populations because the distribution of polymorphic genes among such populations can help in the identification malaria candidate genes. This study determined the distribution of three FcyRs single nucleotide polymorphisms (SNPs) (FcγRIIB-rs1050519, FcγRIIC-rs3933769 and FcγRIIIA-rs396991) among sympatric Fulani and Dogon children with uncomplicated malaria. The association of these SNPs with clinical, malariometric and immunological indices was also tested. Methods This study involved 242 Fulani and Dogon volunteers from Mali age under 15 years. All SNPs were genotyped with predesigned TaqMan® SNP Genotyping Assays. Genotypic and allelic distribution of SNPs was compared across ethnic groups using the Fisher exact test. Variations in clinical, malariometric and immunologic indices between groups were tested with Kruskal–Wallis H, Mann–Whitney U test and Fisher exact test where appropriate. Results The study confirmed known malariometric and immunologic differences between sympatric Fulani and non-Fulani tribes. Parasite density was lower in the Fulani than the Dogon (p < 0.0001). The mutant allele of FcγRIIC (rs3933769) was found more frequently in the Fulani than the Dogon (p < 0.0001) while that of FcγRIIIA (rs396991) occurred less frequently in the Fulani than Dogon (p = 0.0043). The difference in the mutant allele frequency of FcγRIIB (rs1050519) between the two ethnic groups was however not statistically significant (p = 0.064). The mutant allele of rs396991 was associated with high malaria-specific IgG1 and IgG3 in the entire study population and Dogon tribe, p = 0.023 and 0.015, respectively. Parasite burden was lower in carriers of the FcγRIIC (rs3933769) mutant allele than non-carriers in the entire study population (p < 0.0001). Carriers of this allele harboured less than half the parasites found in non-carriers. Conclusion Differences in the allelic frequencies of rs3933769 and rs396991 among Fulani and Dogon indirectly suggest that these SNPs may influence malaria susceptibility and pathogenesis in the study population. The high frequency of the FcγRIIC (rs3933769) mutant allele in the Fulani and its subsequent association with low parasite burden in the entire study population is noteworthy.
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Affiliation(s)
- Mariama Cherif
- Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso. .,Polytechnic University of Bobo Dioulasso, Bobo Dioulasso, Burkina Faso.
| | - Daniel Amoako-Sakyi
- Department of Microbiology and Immunology, College of Health and Allied Sciences, School of Medical Sciences, University of Cape Coast, Cape Coast, Ghana. .,Immunology Department, Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Accra, Ghana.
| | - Amagana Dolo
- Department of Epidemiology of Parasitic Diseases, Faculty of Medicine and Odonto-Stomatology, Malaria Research and Training Centre, USTTB, Bamako, Mali.
| | - Jan-Olov Pearson
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden.
| | - Ben Gyan
- Immunology Department, Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Accra, Ghana.
| | - Dorcas Obiri-Yeboah
- Department of Microbiology and Immunology, College of Health and Allied Sciences, School of Medical Sciences, University of Cape Coast, Cape Coast, Ghana.
| | - Issa Nebie
- Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso.
| | - Sodiomon B Sirima
- Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso.
| | - Ogobara Doumbo
- Department of Epidemiology of Parasitic Diseases, Faculty of Medicine and Odonto-Stomatology, Malaria Research and Training Centre, USTTB, Bamako, Mali.
| | - Marita Troye-Blomberg
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden.
| | - Maiga Bakary
- Department of Epidemiology of Parasitic Diseases, Faculty of Medicine and Odonto-Stomatology, Malaria Research and Training Centre, USTTB, Bamako, Mali.
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Llewellyn D, Miura K, Fay MP, Williams AR, Murungi LM, Shi J, Hodgson SH, Douglas AD, Osier FH, Fairhurst RM, Diakite M, Pleass RJ, Long CA, Draper SJ. Standardization of the antibody-dependent respiratory burst assay with human neutrophils and Plasmodium falciparum malaria. Sci Rep 2015; 5:14081. [PMID: 26373337 PMCID: PMC4571651 DOI: 10.1038/srep14081] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 08/17/2015] [Indexed: 01/09/2023] Open
Abstract
The assessment of naturally-acquired and vaccine-induced immunity to blood-stage Plasmodium falciparum malaria is of long-standing interest. However, the field has suffered from a paucity of in vitro assays that reproducibly measure the anti-parasitic activity induced by antibodies in conjunction with immune cells. Here we optimize the antibody-dependent respiratory burst (ADRB) assay, which assesses the ability of antibodies to activate the release of reactive oxygen species from human neutrophils in response to P. falciparum blood-stage parasites. We focus particularly on assay parameters affecting serum preparation and concentration, and importantly assess reproducibility. Our standardized protocol involves testing each serum sample in singlicate with three independent neutrophil donors, and indexing responses against a standard positive control of pooled hyper-immune Kenyan sera. The protocol can be used to quickly screen large cohorts of samples from individuals enrolled in immuno-epidemiological studies or clinical vaccine trials, and requires only 6 μL of serum per sample. Using a cohort of 86 samples, we show that malaria-exposed individuals induce higher ADRB activity than malaria-naïve individuals. The development of the ADRB assay complements the use of cell-independent assays in blood-stage malaria, such as the assay of growth inhibitory activity, and provides an important standardized cell-based assay in the field.
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Affiliation(s)
- David Llewellyn
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Oxford, OX3 7DQ, UK
| | - Kazutoyo Miura
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, 20852, USA
| | - Michael P. Fay
- Biostatistics Research Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, USA
| | - Andrew R. Williams
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Oxford, OX3 7DQ, UK
| | - Linda M. Murungi
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Oxford, OX3 7DQ, UK
- KEMRI Centre for Geographic Medicine Research, Coast, P.O. Box 230-80108, Kilifi, Kenya
| | - Jianguo Shi
- Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
| | - Susanne H. Hodgson
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Oxford, OX3 7DQ, UK
| | - Alexander D. Douglas
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Oxford, OX3 7DQ, UK
| | - Faith H. Osier
- KEMRI Centre for Geographic Medicine Research, Coast, P.O. Box 230-80108, Kilifi, Kenya
| | - Rick M. Fairhurst
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, 20852, USA
| | - Mahamadou Diakite
- Malaria Research and Training Centre, Faculty of Medicine, Pharmacy and Odonto-stomatology, University of Bamako, Bamako, Mali
| | - Richard J. Pleass
- Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
| | - Carole A. Long
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, 20852, USA
| | - Simon J. Draper
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Oxford, OX3 7DQ, UK
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12
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Zhou J, Feng G, Beeson J, Hogarth PM, Rogerson SJ, Yan Y, Jaworowski A. CD14(hi)CD16+ monocytes phagocytose antibody-opsonised Plasmodium falciparum infected erythrocytes more efficiently than other monocyte subsets, and require CD16 and complement to do so. BMC Med 2015; 13:154. [PMID: 26149666 PMCID: PMC4493812 DOI: 10.1186/s12916-015-0391-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Accepted: 06/03/2015] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND With more than 600,000 deaths from malaria, mainly of children under five years old and caused by infection with Plasmodium falciparum, comes an urgent need for an effective anti-malaria vaccine. Limited details on the mechanisms of protective immunity are a barrier to vaccine development. Antibodies play an important role in immunity to malaria and monocytes are key effectors in antibody-mediated protection by phagocytosing antibody-opsonised infected erythrocytes (IE). Eliciting antibodies that enhance phagocytosis of IE is therefore an important potential component of an effective vaccine, requiring robust assays to determine the ability of elicited antibodies to stimulate this in vivo. The mechanisms by which monocytes ingest IE and the nature of the monocytes which do so are unknown. METHODS Purified trophozoite-stage P. falciparum IE were stained with ethidium bromide, opsonised with anti-erythrocyte antibodies and incubated with fresh whole blood. Phagocytosis of IE and TNF production by individual monocyte subsets was measured by flow cytometry. Ingestion of IE was confirmed by imaging flow cytometry. RESULTS CD14(hi)CD16+ monocytes phagocytosed antibody-opsonised IE and produced TNF more efficiently than CD14(hi)CD16- and CD14(lo)CD16+ monocytes. Blocking experiments showed that Fcγ receptor IIIa (CD16) but not Fcγ receptor IIa (CD32a) or Fcγ receptor I (CD64) was necessary for phagocytosis. CD14(hi)CD16+ monocytes ingested antibody-opsonised IE when peripheral blood mononuclear cells were reconstituted with autologous serum but not heat-inactivated autologous serum. Antibody-opsonised IE were rapidly opsonised with complement component C3 in serum (t1/2 = 2-3 minutes) and phagocytosis of antibody-opsonised IE was inhibited in a dose-dependent manner by an inhibitor of C3 activation, compstatin. Compared to other monocyte subsets, CD14(hi)CD16+ monocytes expressed the highest levels of complement receptor 4 (CD11c) and activated complement receptor 3 (CD11b) subunits. CONCLUSIONS We show a special role for CD14(hi)CD16+ monocytes in phagocytosing opsonised P. falciparum IE and production of TNF. While ingestion was mediated by Fcγ receptor IIIa, this receptor was not sufficient to allow phagocytosis; despite opsonisation with antibody, phagocytosis of IE also required complement opsonisation. Assays which measure the ability of vaccines to elicit a protective antibody response to P. falciparum should consider their ability to promote phagocytosis and fix complement.
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Affiliation(s)
- Jingling Zhou
- Centre for Biomedical Research, Burnet Institute, Melbourne, Victoria, 3004, Australia.
| | - Gaoqian Feng
- Centre for Biomedical Research, Burnet Institute, Melbourne, Victoria, 3004, Australia.
| | - James Beeson
- Centre for Biomedical Research, Burnet Institute, Melbourne, Victoria, 3004, Australia. .,Department of Medicine, University of Melbourne, Melbourne, Victoria, 3050, Australia. .,Department of Microbiology, Monash University, Melbourne, Victoria, 3800, Australia.
| | - P Mark Hogarth
- Centre for Biomedical Research, Burnet Institute, Melbourne, Victoria, 3004, Australia.
| | - Stephen J Rogerson
- Department of Medicine, University of Melbourne, Melbourne, Victoria, 3050, Australia.
| | - Yan Yan
- Department of Chemical and Biomolecular Engineering, University of Melbourne, Melbourne, Victoria, 3800, Australia.
| | - Anthony Jaworowski
- Centre for Biomedical Research, Burnet Institute, Melbourne, Victoria, 3004, Australia. .,Department of Infectious Diseases, Monash University, Melbourne, Victoria, 3800, Australia. .,Department of Immunology, Monash University, Melbourne, Victoria, 3800, Australia.
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13
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Ackerman ME, Alter G. Opportunities to exploit non-neutralizing HIV-specific antibody activity. Curr HIV Res 2014; 11:365-77. [PMID: 24191934 DOI: 10.2174/1570162x113116660058] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Revised: 07/16/2013] [Accepted: 08/03/2013] [Indexed: 12/22/2022]
Abstract
Antibodies act as a nexus between innate and adaptive immunity: they provide a means to engage a spectrum of innate immune effector cells in order to clear viral particles and infected cells and prime antigen presentation. This functional landscape is remarkably complex, and depends on antibody isotype, subclass, and glycosylation; the expression levels and patterns of a suite of Fc receptors with both complementary and opposing activities; and a host of innate immune cells capable of differential responses to opsonized particles and present at different sites. In vivo, even neutralizing antibodies rely on their ability to act as molecular beacons and recruit innate immune effector cells in order to provide protection, and results from both human and macaque studies have implicated these effector functions in vaccinemediated protection. Thus, while enhancing effector function is a tractable handle for potentiating antibody-mediated protection from HIV infection, success will depend critically on leveraging understanding of the means by which antibodies with specific functional profiles could be elicited, which effector functions could provide optimal protection, and perhaps most critically, how to efficiently recruit the innate effector cells present at sites of infection.
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Affiliation(s)
- Margaret E Ackerman
- Ragon Institute of MGH, MIT, and Harvard University, Cambridge, MA 02139, USA.
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14
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Abasi M, Lotfi P, Bazmani A, Matini M, Hajilooi M. Evaluation of FcγRIIIB-NA1/NA2 Polymorphism in Visceral Leishmaniasis. IRANIAN RED CRESCENT MEDICAL JOURNAL 2014; 16:e12437. [PMID: 24910789 PMCID: PMC4028762 DOI: 10.5812/ircmj.12437] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Revised: 08/06/2013] [Accepted: 09/15/2013] [Indexed: 11/16/2022]
Abstract
BACKGROUND Several lines of evidence demonstrating that innate and adaptive immunity play important roles in the defense against visceral leishmaniasis (VL). A polymorphism within the FcγRIIIB gene can lead to the expression of three variants of NA1, NA2, and the combined one (NA1/NA2) which alters affinity of IgG to its receptor. OBJECTIVES The main aim of this study was to evaluate the FcγRIIIB-NA1/NA2 polymorphism in the FcγRIIIB gene of VL patients in comparison to healthy controls. PATIENTS AND METHODS In this cross-sectional study, three groups; 54 seropositive patients with clinical presentation of VL (group 1), 104 seropositive patients without clinical presentation (group 2), and 104 healthy controls (group 3) were evaluated with respect to the FcγRIIIB-NA1/NA2 polymorphism using a PCR-SSP method. The titration of anti-leishmania antibodies was analyzed using an immunoflorescence technique. RESULTS Our results indicated that polymorphisms within the FcγRIIIB gene (that lead to the expression of the NA1/NA2 isoforms) are significantly associated with VL. The results demonstrated that the genotype heterozygotic for FcγRIIIB-NA1/NA2 expression was significantly increased in VL patients, group 1 when compared to groups 2 and 3. Conversely, there is a decrease in homozygous NA1 and NA2 genotypes in VL patients; however, the overall frequency of NA1 and NA2 alleles appear similar across the three cohorts examined. CONCLUSIONS According to our results, it is likely that the increased frequency of the FcγRIIIB-NA1/NA2 genotype is associated with impaired immune responses against VL and its subsequent clearance from the patient.
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Affiliation(s)
- Mohammad Abasi
- Faculty of Medicine, Shahid Beheshti Hospital, Hamadan University of Medical Sciences, Hamadan, IR Iran
| | - Pegah Lotfi
- Department of Microbiology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, IR Iran
| | - Ahad Bazmani
- Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, IR Iran
| | - Mohamad Matini
- Department of Parasitology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, IR Iran
| | - Mehrdad Hajilooi
- Department of Immunology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, IR Iran
- Corresponding Author: Mehrdad Hajilooi, Department of Immunology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, IR Iran. Tel: +98-8118250509, Fax: +98-8118254073, E-mail:
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Khodoun MV, Kucuk ZY, Strait RT, Krishnamurthy D, Janek K, Clay CD, Morris SC, Finkelman FD. Rapid desensitization of mice with anti-FcγRIIb/FcγRIII mAb safely prevents IgG-mediated anaphylaxis. J Allergy Clin Immunol 2013; 132:1375-87. [PMID: 24139828 DOI: 10.1016/j.jaci.2013.09.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 07/29/2013] [Accepted: 09/12/2013] [Indexed: 11/19/2022]
Abstract
BACKGROUND Stimulatory IgG receptors (FcγRs) on bone marrow-derived cells contribute to the pathogenesis of several autoimmune and inflammatory disorders. Monoclonal antibodies that block FcγRs might suppress these diseases, but they can induce anaphylaxis. OBJECTIVE We wanted to determine whether a rapid desensitization approach can safely suppress IgG/FcγR-mediated anaphylaxis. METHODS Mice were injected with serially increasing doses of 2.4G2, a rat mAb that blocks the inhibitory FcγR, FcγRIIb, and the stimulatory receptor, FcγRIII. Rectal temperature was used to detect the development of anaphylaxis. Passive and active IgG-mediated anaphylaxis were evaluated in mice that had been rapidly desensitized with 2.4G2 or mock-desensitized in mice in which monocyte/macrophages, basophils, or neutrophils had been depleted or desensitized and in mice in which FcγRI, FcγRIII, and/or FcγRIV had been deleted or blocked. RESULTS Rapid desensitization with 2.4G2 prevented 2.4G2-induced shock and completely suppressed IgG-mediated anaphylaxis. Rapid desensitization of ovalbumin-sensitized mice with 2.4G2 was safer and more effective than rapid desensitization with ovalbumin. 2.4G2 treatment completely blocked FcγRIII and removed most FcγRI and FcγRIV from nucleated peripheral blood cells. Because IgG(2a)-mediated anaphylaxis was partially FcγRI and FcγRIV dependent, the effects of 2.4G2 on FcγRI and FcγRIV were probably crucial for its complete inhibition of IgG(2a)-mediated anaphylaxis. IgG(2a)-mediated anaphylaxis was partially inhibited by depletion or desensitization of monocyte/macrophages, basophils, or neutrophils. CONCLUSION IgG-mediated anaphylaxis can be induced by ligation of FcγRI, FcγRIII, or FcγRIV on monocycte/macrophages, basophils, or neutrophils and can be safely suppressed by rapid desensitization with anti-FcγRII/RIII mAb. A similar approach may safely suppress other FcγR-dependent immunopathology.
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MESH Headings
- Anaphylaxis/immunology
- Anaphylaxis/prevention & control
- Animals
- Antibodies, Blocking/administration & dosage
- Antibodies, Blocking/adverse effects
- Antibodies, Monoclonal/administration & dosage
- Antibodies, Monoclonal/adverse effects
- Basophils/drug effects
- Basophils/immunology
- Body Temperature/drug effects
- Body Temperature/immunology
- Desensitization, Immunologic/methods
- Disease Models, Animal
- Female
- Hypersensitivity/complications
- Hypersensitivity/therapy
- Macrophages/immunology
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Neutrophils/drug effects
- Neutrophils/immunology
- Ovalbumin/immunology
- Rats
- Receptors, IgG/antagonists & inhibitors
- Receptors, IgG/immunology
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Affiliation(s)
- Marat V Khodoun
- Department of Research, Cincinnati Veterans Affairs Medical Center, Cincinnati, Ohio; Division of Immunology, Allergy and Rheumatology, Department of Medicine, University of Cincinnati School of Medicine, Cincinnati, Ohio
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16
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Polymorphisms in the Fc gamma receptor IIIA and Toll-like receptor 9 are associated with protection against severe malarial anemia and changes in circulating gamma interferon levels. Infect Immun 2012; 80:4435-43. [PMID: 23045477 DOI: 10.1128/iai.00945-12] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
An understanding of the immunogenetic basis of naturally acquired immunity to Plasmodium falciparum infection would aid in the designing of a rationally based malaria vaccine. Variants within the Fc gamma receptors (FcγRs) mediate immunity through engagement of immunoglobulin G and other immune mediators, such as gamma interferon (IFN-γ), resulting in erythrophagocytosis and production of inflammatory cytokines in severe malarial anemia (SMA). The Toll-like receptors (TLRs) trigger transcription of proinflammatory cytokines and induce adaptive immune responses. Therefore, these receptors may condition malaria disease pathogenesis through alteration in adaptive and innate immune responses. To further delineate the impacts of FcγRIIIA and TLR9 in SMA pathogenesis, the associations between FcγRIIIA -176F/V and TLR9 -1237T/C variants, SMA (hemoglobin [Hb] < 6.0 g/dl), and circulating IFN-γ levels were investigated in children (n = 301) from western Kenya with acute malaria. Multivariate logistic regression analysis (controlling for potential confounders) revealed that children with the FcγRIIIA -176V/TLR9 -1237C (VC) variant combination had 64% reduced odds of developing SMA (odds ratio [OR], 0.36; 95% confidence interval [CI], 0.20 to 0.64; P = 0.001), while carriers of the FcγRIIIA -176V/TLR9 -1237T (VT) variant combination were twice as susceptible to SMA (OR, 2.04; 95% CI, 1.19 to 3.50; P = 0.009). Children with SMA had higher circulating IFN-γ levels than non-SMA children (P = 0.008). Hemoglobin levels were negatively correlated with IFN-γ levels (r = -0.207, P = 0.022). Consistently, the FcγRIIIA -176V/TLR9 -1237T (VT) carriers had higher levels of circulating IFN-γ (P = 0.011) relative to noncarriers, supporting the observation that higher IFN-γ levels are associated with SMA. These results demonstrate that FcγRIIIA-176F/V and TLR9 -1237T/C variants condition susceptibility to SMA and functional changes in circulating IFN-γ levels.
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17
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Adu B, Dodoo D, Adukpo S, Hedley PL, Arthur FKN, Gerds TA, Larsen SO, Christiansen M, Theisen M. Fc γ receptor IIIB (FcγRIIIB) polymorphisms are associated with clinical malaria in Ghanaian children. PLoS One 2012; 7:e46197. [PMID: 23049979 PMCID: PMC3458101 DOI: 10.1371/journal.pone.0046197] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Accepted: 08/28/2012] [Indexed: 12/12/2022] Open
Abstract
Plasmodium falciparum malaria kills nearly a million people annually. Over 90% of these deaths occur in children under five years of age in sub-Saharan Africa. A neutrophil mediated mechanism, the antibody dependent respiratory burst (ADRB), was recently shown to correlate with protection from clinical malaria. Human neutrophils constitutively express Fc gamma receptor-FcγRIIA and FcγRIIIB by which they interact with immunoglobulin (Ig) G (IgG)-subclass antibodies. Polymorphisms in exon 4 of FCGR2A and exon 3 of FCGR3B genes encoding FcγRIIA and FcγRIIIB respectively have been described to alter the affinities of both receptors for IgG. Here, associations between specific polymorphisms, encoding FcγRIIA p.H166R and FcγRIIIB-NA1/NA2/SH variants with clinical malaria were investigated in a longitudinal malaria cohort study. FcγRIIA-p.166H/R was genotyped by gene specific polymerase chain reaction followed by allele specific restriction enzyme digestion. FCGR3B-exon 3 was sequenced in 585 children, aged 1 to 12 years living in a malaria endemic region of Ghana. Multivariate logistic regression analysis found no association between FcγRIIA-166H/R polymorphism and clinical malaria. The A-allele of FCGR3B-c.233C>A (rs5030738) was significantly associated with protection from clinical malaria under two out of three genetic models (additive: p=0.0061; recessive: p=0.097; dominant: p=0.0076) of inheritance. The FcγRIIIB-SH allotype (CTGAAA) containing the 233A-allele (in bold) was associated with protection from malaria (p=0.049). The FcγRIIIB-NA2*03 allotype (CTGCGA), a variant of the classical FcγRIIIB-NA2 (CTGCAA) was associated with susceptibility to clinical malaria (p=0.0092). The present study is the first to report an association between a variant of FcγRIIIB-NA2 and susceptibility to clinical malaria and provides justification for further functional characterization of variants of the classical FcγRIIIB allotypes. This would be crucial to the improvement of neutrophil mediated functional assays such as the ADRB assay aimed at assessing the functionality of antibodies induced by candidate malaria vaccines.
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Affiliation(s)
- Bright Adu
- Department of Clinical Biochemistry and Immunology, Statens Serum Institut, Copenhagen, Denmark
- Centre for Medical Parasitology at Department of International Health, Immunology, and Microbiology and Department of Infectious Diseases, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Daniel Dodoo
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | - Selorme Adukpo
- Department of Clinical Biochemistry and Immunology, Statens Serum Institut, Copenhagen, Denmark
| | - Paula L. Hedley
- Department of Clinical Biochemistry and Immunology, Statens Serum Institut, Copenhagen, Denmark
- Department of Biomedical Sciences, University of Stellenbosch, Cape Town, South Africa
| | - Fareed K. N. Arthur
- Department of Biochemistry and Biotechnology, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Thomas A. Gerds
- Department of Biostatistics, University of Copenhagen, Copenhagen, Denmark
| | - Severin O. Larsen
- Department of Clinical Biochemistry and Immunology, Statens Serum Institut, Copenhagen, Denmark
| | - Michael Christiansen
- Department of Clinical Biochemistry and Immunology, Statens Serum Institut, Copenhagen, Denmark
| | - Michael Theisen
- Department of Clinical Biochemistry and Immunology, Statens Serum Institut, Copenhagen, Denmark
- Centre for Medical Parasitology at Department of International Health, Immunology, and Microbiology and Department of Infectious Diseases, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
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Omar AH, Shibata H, Yasunami M, Yamazaki A, Ofori MF, Akanmori BD, Shuaibu MN, Kikuchi M, Hirayama K. The rs150311303 Polymorphism in FcγRIIa Enhances IgG Binding Capacity. Scand J Immunol 2012; 76:167-74. [DOI: 10.1111/j.1365-3083.2012.02715.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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