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Lopez-Perez M, Viwami F, Doritchamou J, Ndam NT, Hviid L. Natural Acquired Immunity to Malaria Antigens among Pregnant Women with Hemoglobin C Trait. Am J Trop Med Hyg 2022; 106:853-856. [PMID: 35026728 PMCID: PMC8922521 DOI: 10.4269/ajtmh.21-1039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 11/17/2021] [Indexed: 11/07/2022] Open
Abstract
Hemoglobin C is the second most common structural hemoglobinopathy in Africa, and carriers have a reduced risk of severe malaria. However, the effect of HbAC on the antibody response to malaria antigens in pregnancy has not been studied. Here, we measured PfEMP1-specific antibodies in plasma samples from 74 Beninese pregnant women with either HbAA or HbAC. IgG-mediated inhibition of VAR2CSA+ infected erythrocytes adhesion to chondroitin sulfate A (CSA) was also tested. PfEMP1-specific IgG levels to VAR2CSA were significantly lower in HbAC women, suggesting less exposure to VAR2CSA. In contrast, the percentage of VAR2CSA+-infected erythrocytes adhesion to CSA was not different between HbAA and HbAC women. Moreover, IgG levels to PfEMP1 variants associated with severe malaria were not significantly different between groups. The findings indicate similar exposure to Plasmodium falciparum parasites expressing PfEMP1 variants causing severe malaria, and justify more comprehensive studies of hemoglobinopathy-related qualitative and quantitative differences in PfEMP1-specific antibody responses.
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Affiliation(s)
- Mary Lopez-Perez
- Centre for Medical Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark;,Address correspondence to Mary Lopez-Perez, Panum Institute 07-11-38, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark. E-mail:
| | - Firmine Viwami
- UMR 261 MERIT, Université de Paris, Institut de Recherche pour le Développement (IRD), Paris, France;,Institut de Recherche Clinique du Benin, Abomey Calavi, Benin
| | | | - Nicaise Tuikue Ndam
- UMR 261 MERIT, Université de Paris, Institut de Recherche pour le Développement (IRD), Paris, France;,Institut de Recherche Clinique du Benin, Abomey Calavi, Benin;,Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | - Lars Hviid
- Centre for Medical Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark;,Centre for Medical Parasitology, Department of Infectious Diseases, Rigshospitalet, Copenhagen, Denmark
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Lopez-Perez M, Viwami F, Seidu Z, Jensen ATR, Doritchamou J, Ndam NT, Hviid L. PfEMP1-Specific Immunoglobulin G Reactivity Among Beninese Pregnant Women With Sickle Cell Trait. Open Forum Infect Dis 2021; 8:ofab527. [PMID: 34909438 PMCID: PMC8664683 DOI: 10.1093/ofid/ofab527] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 10/14/2021] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Sickle cell trait (HbAS) protects against severe Plasmodium falciparum malaria but not against placental malaria (PM). In this study, P falciparum erythrocyte membrane protein (PfEMP1)-specific antibodies were measured in HbAA and HbAS Beninese pregnant women as a proxy of exposure to specific PfEMP1 variants. METHODS Plasma samples collected at delivery from 338 HbAA and 63 HbAS women were used to measure immunoglobulin (Ig)G levels to 6 recombinant PfEMP1 proteins and 3 corresponding native proteins expressed on the infected erythrocyte (IE) surface. Immunoglobulin G-mediated inhibition of VAR2CSA+ IEs adhesion to chondroitin sulfate A (CSA) was also tested. RESULTS Levels of PfEMP1-specific IgG were similar in the 2 groups, except for native IT4VAR09 on IEs, where IgG levels were significantly higher in HbAS women. Adjusted odds ratios for women with positive IgG to HB3VAR06 and PFD1235w suggest a lower risk of infection with these virulent variants among HbAS individuals. The percentage of IEs binding to CSA did not differ between HbAA and HbAS women, but it correlated positively with levels of anti-VAR2CSA and parity. Women with PM had lower levels of anti-VAR2CSA-specific IgG and lower IgG-mediated inhibition of IE adhesion to CSA. CONCLUSIONS The findings support similar malaria exposure in HbAA and HbAS women and a lack of HbAS-dependent protection against placental infection among pregnant women.
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Affiliation(s)
- Mary Lopez-Perez
- Centre for Medical Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Firmine Viwami
- UMR 261 MERIT, Université de Paris, Institut de Recherche pour le Développement, Paris, France
- Institut de Recherche Clinique du Benin, Abomey Calavi, Benin
| | - Zakaria Seidu
- Centre for Medical Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
- West Africa Centre for Cell Biology of Infectious Pathogens (WACCBIP), Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Accra, Ghana
| | - Anja T R Jensen
- Centre for Medical Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | | | - Nicaise Tuikue Ndam
- UMR 261 MERIT, Université de Paris, Institut de Recherche pour le Développement, Paris, France
- Institut de Recherche Clinique du Benin, Abomey Calavi, Benin
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | - Lars Hviid
- Centre for Medical Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Centre for Medical Parasitology, Department of Infectious Diseases, Rigshospitalet, Copenhagen, Denmark
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Chauvet M, Chhuon C, Lipecka J, Dechavanne S, Dechavanne C, Lohezic M, Ortalli M, Pineau D, Ribeil JA, Manceau S, Le Van Kim C, Luty AJF, Migot-Nabias F, Azouzi S, Guerrera IC, Merckx A. Sickle Cell Trait Modulates the Proteome and Phosphoproteome of Plasmodium falciparum-Infected Erythrocytes. Front Cell Infect Microbiol 2021; 11:637604. [PMID: 33842387 PMCID: PMC8024585 DOI: 10.3389/fcimb.2021.637604] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 02/23/2021] [Indexed: 11/21/2022] Open
Abstract
The high prevalence of sickle cell disease in some human populations likely results from the protection afforded against severe Plasmodium falciparum malaria and death by heterozygous carriage of HbS. P. falciparum remodels the erythrocyte membrane and skeleton, displaying parasite proteins at the erythrocyte surface that interact with key human proteins in the Ankyrin R and 4.1R complexes. Oxidative stress generated by HbS, as well as by parasite invasion, disrupts the kinase/phosphatase balance, potentially interfering with the molecular interactions between human and parasite proteins. HbS is known to be associated with abnormal membrane display of parasite antigens. Studying the proteome and the phosphoproteome of red cell membrane extracts from P. falciparum infected and non-infected erythrocytes, we show here that HbS heterozygous carriage, combined with infection, modulates the phosphorylation of erythrocyte membrane transporters and skeletal proteins as well as of parasite proteins. Our results highlight modifications of Ser-/Thr- and/or Tyr- phosphorylation in key human proteins, such as ankyrin, β-adducin, β-spectrin and Band 3, and key parasite proteins, such as RESA or MESA. Altered phosphorylation patterns could disturb the interactions within membrane protein complexes, affect nutrient uptake and the infected erythrocyte cytoadherence phenomenon, thus lessening the severity of malaria symptoms.
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Affiliation(s)
- Margaux Chauvet
- Université de Paris, MERIT, IRD, Paris, France.,Laboratoire d'Excellence GR-Ex, Paris, France
| | - Cerina Chhuon
- Université de Paris, Proteomics Platform Necker, Structure Fédérative de Recherche Necker, Inserm US24/CNRS, UMS3633, Paris, France
| | - Joanna Lipecka
- Université de Paris, Proteomics Platform Necker, Structure Fédérative de Recherche Necker, Inserm US24/CNRS, UMS3633, Paris, France
| | - Sébastien Dechavanne
- Laboratoire d'Excellence GR-Ex, Paris, France.,Université de Paris, Inserm, BIGR, Paris, France.,Institut National de la Transfusion Sanguine, Paris, France
| | | | | | - Margherita Ortalli
- Université de Paris, MERIT, IRD, Paris, France.,Laboratoire d'Excellence GR-Ex, Paris, France
| | - Damien Pineau
- Université de Paris, MERIT, IRD, Paris, France.,Laboratoire d'Excellence GR-Ex, Paris, France
| | - Jean-Antoine Ribeil
- Biotherapy Department, Necker Children's Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Sandra Manceau
- Laboratoire d'Excellence GR-Ex, Paris, France.,Biotherapy Department, Necker Children's Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Caroline Le Van Kim
- Laboratoire d'Excellence GR-Ex, Paris, France.,Université de Paris, Inserm, BIGR, Paris, France.,Institut National de la Transfusion Sanguine, Paris, France
| | | | | | - Slim Azouzi
- Laboratoire d'Excellence GR-Ex, Paris, France.,Université de Paris, Inserm, BIGR, Paris, France.,Institut National de la Transfusion Sanguine, Paris, France
| | - Ida Chiara Guerrera
- Université de Paris, Proteomics Platform Necker, Structure Fédérative de Recherche Necker, Inserm US24/CNRS, UMS3633, Paris, France
| | - Anaïs Merckx
- Université de Paris, MERIT, IRD, Paris, France.,Laboratoire d'Excellence GR-Ex, Paris, France
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Nkwabong E, Ngoundjou Dongmo P, Tayou C, Nana Njamen T. Outcome of pregnancies among women with sickle cell disease. J Matern Fetal Neonatal Med 2020; 35:1108-1112. [PMID: 32233705 DOI: 10.1080/14767058.2020.1743657] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Purpose: To evaluate the outcome of pregnancies among women affected by sickle cell disease (SCD).Material and methods: This retrospective comparative cohort study was carried out between 1 January 2014 and 31 December 2018. The files of pregnant women with and without SCD were analyzed. The main variables recorded included parity, diseases that occurred during pregnancy, maternal and gestational ages at delivery, mode of delivery, birthweight and Apgar score. Data were analyzed using SPSS 21.0. Fisher exact test and the t-test was used for comparison. p < .05 was considered statistically significant.Results: Our frequency of delivery of women with SCD was 0.1% (35/34,895). Significant complications associated with SCD were maternal anemia (RR = 17.00, 95%CI = 5.35-53.99), intra-uterine fetal demise (RR = 12.00, 95%CI = 1.39-103.22), low birthweight (RR = 2.52, 95%CI = 1.50-4.25), neonatal asphyxia (RR = 7.70, 95%CI = 2.57-22.99), transfer of newborn to the neonatal intensive care unit (RR = 3.42, 95%CI = 1.94-6.03), early neonatal death (RR = 4.56, 95%CI = 1.09-19.10), and maternal postpartum severe anemia (RR = 4.50, 95%CI = 1.36-14.87).Conclusions: Pregnancies amongst women with SCD are still associated with increased risk of maternal anemia as well as perinatal morbidity and mortality despite frequent blood transfusion. Therefore, new strategies should be explored to improve such pregnancies.
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Affiliation(s)
- Elie Nkwabong
- Department of Obstetrics and Gynecology, Faculty of Medicine and Biomedical Sciences, University Teaching Hospital, Yaoundé, Cameroon
| | | | - Claude Tayou
- Department of Hematology & Microbiology, Faculty of Medicine and Biomedical Sciences & University Teaching Hospital, Yaoundé, Cameroon
| | - Théophile Nana Njamen
- Department of Surgery, Obstetrics and Gynecology, Faculty of Health Sciences, Douala General Hospital, University of Buéa, Buéa, Cameroon
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