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Coe CL, Nimityongskul F, Lubach GR, Luke K, Rancour D, Schomburg FM. Maternal Immunization with Adjuvanted Recombinant Receptor-Binding Domain Protein Provides Immune Protection against SARS-CoV-2 in Infant Monkeys. Vaccines (Basel) 2024; 12:929. [PMID: 39204052 PMCID: PMC11359192 DOI: 10.3390/vaccines12080929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2024] [Revised: 08/10/2024] [Accepted: 08/15/2024] [Indexed: 09/03/2024] Open
Abstract
Maternal vaccinations administered prior to conception or during pregnancy enhance the immune protection of newborn infants against many pathogens. A feasibility experiment was conducted to determine if monkeys can be used to model the placental transfer of maternal antibody against SARS-CoV-2. Six adult rhesus monkeys were immunized with adjuvanted recombinant-protein antigens comprised of receptor-binding domain human IgG1-Fc fusion proteins (RBD-Fc) containing protein sequences from the ancestral-Wuhan or Gamma variants. The female monkeys mounted robust and sustained anti-SARS-CoV-2 antibody responses. Blood samples collected from their infants after delivery verified prenatal transfer of high levels of spike-specific IgG, which were positively correlated with maternal IgG titers at term. In addition, an in vitro test of ACE2 neutralization indicated that the infants' IgG demonstrated antigen specificity, reflecting prior maternal immunization with either Wuhan or Gamma-variant antigens. All sera showed stronger ACE2-RBD binding inhibition when variants in the assay more closely resembled the vaccine RBD sequence than with more distantly related variants (i.e., Delta and Omicron). Monkeys are a valuable animal model for evaluating new vaccines that can promote maternal and infant health. Further, the findings highlight the enduring nature and safety of the immune protection elicited by an adjuvanted recombinant RBD-Fc vaccine.
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Affiliation(s)
- Christopher L. Coe
- Harlow Center for Biological Psychology, University of Wisconsin-Madison, Madison, WI 53715, USA;
| | | | - Gabriele R. Lubach
- Harlow Center for Biological Psychology, University of Wisconsin-Madison, Madison, WI 53715, USA;
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Lucot-Royer L, Nallet C, Vouga M, Puyraveau M, Mauny F, Marty-Quinternet S, Bertholdt C, Bory JP, Devalland C, Canaguier M, Copolla C, Eszto ML, Montoya Y, Roesch M, Reviron S, Riethmuller D, Rufenacht E, Simon E, Mottet N. Analysis of the transplacental transmission of SARS CoV-2 virus and antibody transfer according to the gestational age at maternal infection. Sci Rep 2024; 14:3458. [PMID: 38342940 PMCID: PMC10859378 DOI: 10.1038/s41598-024-53580-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Accepted: 02/02/2024] [Indexed: 02/13/2024] Open
Abstract
To quantify transplacental transmission of SARS-CoV-2 virus and antibody transfer in pregnant women and their newborns according to the gestational age at maternal infection. A prospective observational multicenter study including pregnant women with a positive RT-PCR or a positive serology for SARS-CoV-2 and compatible symptoms, from April to December 2020, in 11 French maternities. The study was designed to obtain a systematic collection of mother-infant dyad's samples at birth. SARS-CoV-2 viral load was measured by RT-PCR. IgG and IgM antibodies against the SARS-CoV-2 spike protein were measured by enzyme-linked immunosorbent assay. Antibody concentrations and transplacental transfer ratios were analyzed according to the gestational age at maternal infection. The primary outcome was the rate of SARS CoV-2 materno-fetal transmission at birth. The secondary outcome was the quantification of materno-fetal antibody transfer. Maternal and neonatal outcomes at birth were additionally assessed. Among 165 dyads enrolled, one congenital infection was confirmed {n = 1 (0.63%) IC95% [0.02%; 3.48%]}. The average placental IgG antibody transfer ratio was 1.27 (IC 95% [0.69-2.89]). The transfer ratio increased with increasing time between the onset of maternal infection and delivery (P Value = 0.0001). Maternal and neonatal outcomes were reassuring. We confirmed the very low rate of SARS-CoV-2 transplacental transmission (< 1%). Maternal antibody transfer to the fetus was more efficient when the infection occurred during the first and second trimester of pregnancy.
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Affiliation(s)
- Louise Lucot-Royer
- Pôle Mère-Femme, Department of Obstetrics and Gynecology, University Hospital of Besancon, University of Franche-Comte, Alexander Fleming Boulevard, 25000, Besançon, France
| | - Camille Nallet
- Pôle Mère-Femme, Department of Obstetrics and Gynecology, University Hospital of Besancon, University of Franche-Comte, Alexander Fleming Boulevard, 25000, Besançon, France
| | - Manon Vouga
- Pôle Mère-Femme, Department of Obstetrics and Gynecology, University Hospital of Besancon, University of Franche-Comte, Alexander Fleming Boulevard, 25000, Besançon, France
| | - Marc Puyraveau
- Pôle Mère-Femme, Department of Obstetrics and Gynecology, University Hospital of Besancon, University of Franche-Comte, Alexander Fleming Boulevard, 25000, Besançon, France
| | - Frederic Mauny
- Pôle Mère-Femme, Department of Obstetrics and Gynecology, University Hospital of Besancon, University of Franche-Comte, Alexander Fleming Boulevard, 25000, Besançon, France
| | - Solène Marty-Quinternet
- Nanomedicine Lab, Imagery and Therapeutics, EA4662, University of Franche-Comte, 25000, Besançoon, France
| | - Charline Bertholdt
- Department of Obstetrics and Gynecology, University Hospital of Nancy, Nancy Hopital Central, 54000, Nancy, France
| | - Jean-Paul Bory
- Department of Obstetrics and Gynecology, University Hospital of Reims, 51092, Reims, France
| | - Christine Devalland
- Department of Obstetrics and Gynecology, Hopital Nord Franche Comté, 90400, Trévenans, France
| | - Margaux Canaguier
- Department of Obstetrics and Gynecology, Hopital Nord Franche Comté, 90400, Trévenans, France
| | - Camille Copolla
- Department of Obstetrics and Gynecology, Groupe Hospitalier de la Haute-Saone, 70000, Vesoul, France
| | - Marie-Laure Eszto
- Department of Obstetrics and Gynecology, CHR Metz-Thionville, 57100, Thionville, France
| | - Yohny Montoya
- Department of Obstetrics and Gynecology, CHR Metz-Thionville, 57100, Thionville, France
| | - Marion Roesch
- Department of Obstetrics and Gynecology, CHR Metz-Thionville, 57100, Thionville, France
| | - Sandrine Reviron
- Department of Obstetrics and Gynecology, Hopital Jura Sud, 39000, Lons-Le-Saunier, France
| | - Didier Riethmuller
- Department of Obstetrics and Gynecology, University Hospital of Grenoble, CHU Grenoble Alpes, 38700, La Tronche, France
| | - Emma Rufenacht
- Department of Obstetrics and Gynecology, Centre Hospitalier Intercommunal de Haute Comté, 25300, Pontarlier, France
| | - Emmanuel Simon
- Department of Obstetrics and Gynecology, University Hospital of Dijon, CHU Mitterand, 21000, Dijon, France
| | - Nicolas Mottet
- Pôle Mère-Femme, Department of Obstetrics and Gynecology, University Hospital of Besancon, University of Franche-Comte, Alexander Fleming Boulevard, 25000, Besançon, France.
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Harakeh S, Khan IA, Rani GF, Ibrahim M, Khan AS, Almuhayawi M, Al-Raddadi R, Teklemariam AD, Hazzazi MS, Bawazir WM, Niyazi HA, Alamri T, Niyazi HA, Yousafzai YM. Transplacental Transfer of SARS-CoV-2 Receptor-Binding Domain IgG Antibodies from Mothers to Neonates in a Cohort of Pakistani Unvaccinated Mothers. Biomedicines 2023; 11:1651. [PMID: 37371746 DOI: 10.3390/biomedicines11061651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 05/26/2023] [Accepted: 05/30/2023] [Indexed: 06/29/2023] Open
Abstract
The presence of COVID-19 antibodies in the maternal circulation is assumed to be protective for newborns against SARS-CoV-2 infection. We investigated whether maternal COVID-19 antibodies crossed the transplacental barrier and whether there was any difference in the hematological parameters of neonates born to mothers who recovered from COVID-19 during pregnancy. The cross-sectional study was conducted at the Saidu Group of Teaching Hospitals, located in Swat, Khyber Pakhtunkhwa. After obtaining written informed consent, 115 healthy, unvaccinated mother-neonate dyads were included. A clinical history of COVID-19-like illness, laboratory-confirmed diagnosis, and contact history were obtained. Serum samples from mothers and neonates were tested for SARS-CoV-2 anti-receptor-binding domain (anti-RBD) IgG antibodies. Hematological parameters were assessed with complete blood counts (CBC) and peripheral blood smear examinations. The study population consisted of 115 mothers, with a mean age of 29.44 ± 5.75 years, and most women (68/115 (59.1%)) were between 26 and 35 years of age. Of these mothers, 88/115 (76.5 percent) tested positive for SARS-CoV-2 anti-RBD IgG antibodies, as did 83/115 (72.2 percent) neonatal cord blood samples. The mean levels of SARS-CoV-2 IgG antibodies in maternal and neonatal blood were 19.86 ± 13.82 (IU/mL) and 16.16 ± 12.90 (IU/mL), respectively, indicating that maternal antibodies efficiently crossed the transplacental barrier with an antibody transfer ratio of 0.83. The study found no significant difference in complete blood count (CBC) parameters between seropositive and seronegative mothers, nor between neonates born to seropositive and seronegative mothers.
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Affiliation(s)
- Steve Harakeh
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Yousef Abdul Latif Jameel Scientific Chair of Prophetic Medicine Application, Faculty of Medicine, King Abdulaziz University, Jeddah 22230, Saudi Arabia
| | - Ihsan Alam Khan
- Department of Hematology, Institute of Pathology and Diagnostic Medicine, Khyber Medical University, Peshawar 25100, Pakistan
- Department of Pathology, Swat Medical College, Swat 19200, Pakistan
| | - Gulab Fatima Rani
- Department of Hematology, Institute of Pathology and Diagnostic Medicine, Khyber Medical University, Peshawar 25100, Pakistan
| | - Muhammad Ibrahim
- Department of Hematology, Institute of Pathology and Diagnostic Medicine, Khyber Medical University, Peshawar 25100, Pakistan
| | - Aysha Sarwar Khan
- Department of Hematology, Institute of Pathology and Diagnostic Medicine, Khyber Medical University, Peshawar 25100, Pakistan
| | - Mohammed Almuhayawi
- Department of Clinical Microbiology and Immunology, Faculty of Medicine, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Rajaa Al-Raddadi
- Community Medicine Department, Faculty of Medicine, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Addisu D Teklemariam
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Mohannad S Hazzazi
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 22254, Saudi Arabia
- Hematology Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 22254, Saudi Arabia
| | - Waleed M Bawazir
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 22254, Saudi Arabia
- Hematology Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 22254, Saudi Arabia
| | - Hanouf A Niyazi
- Department of Clinical Microbiology and Immunology, Faculty of Medicine, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Turki Alamri
- Family and Community Medicine Department, Faculty of Medicine in Rabigh, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Hatoon A Niyazi
- Department of Clinical Microbiology and Immunology, Faculty of Medicine, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Yasar Mehmood Yousafzai
- Department of Hematology, Institute of Pathology and Diagnostic Medicine, Khyber Medical University, Peshawar 25100, Pakistan
- Rehman Medical Institute, Hayatabad Phase-V, Peshawar 25600, Pakistan
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