Cross-Reactive Antibodies to SARS-CoV-2 and MERS-CoV in Pre-COVID-19 Blood Samples from Sierra Leoneans

Many countries in sub-Saharan Africa have experienced lower COVID-19 caseloads and fewer deaths than countries in other regions worldwide. Under-reporting of cases and a younger population could partly account for these differences, but pre-existing immunity to coronaviruses is another potential fac...

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Published inViruses Vol. 13; no. 11; p. 2325
Main Authors Borrega, Rodrigo, Nelson, Diana K. S., Koval, Anatoliy P., Bond, Nell G., Heinrich, Megan L., Rowland, Megan M., Lathigra, Raju, Bush, Duane J., Aimukanova, Irina, Phinney, Whitney N., Koval, Sophia A., Hoffmann, Andrew R., Smither, Allison R., Bell-Kareem, Antoinette R., Melnik, Lilia I., Genemaras, Kaylynn J., Chao, Karissa, Snarski, Patricia, Melton, Alexandra B., Harrell, Jaikin E., Smira, Ashley A., Elliott, Debra H., Rouelle, Julie A., Sabino-Santos, Gilberto, Drouin, Arnaud C., Momoh, Mambu, Sandi, John Demby, Goba, Augustine, Samuels, Robert J., Kanneh, Lansana, Gbakie, Michael, Branco, Zoe L., Shaffer, Jeffrey G., Schieffelin, John S., Robinson, James E., Fusco, Dahlene N., Sabeti, Pardis C., Andersen, Kristian G., Grant, Donald S., Boisen, Matthew L., Branco, Luis M., Garry, Robert F.
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 21.11.2021
MDPI
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Abstract Many countries in sub-Saharan Africa have experienced lower COVID-19 caseloads and fewer deaths than countries in other regions worldwide. Under-reporting of cases and a younger population could partly account for these differences, but pre-existing immunity to coronaviruses is another potential factor. Blood samples from Sierra Leonean Lassa fever and Ebola survivors and their contacts collected before the first reported COVID-19 cases were assessed using enzyme-linked immunosorbent assays for the presence of antibodies binding to proteins of coronaviruses that infect humans. Results were compared to COVID-19 subjects and healthy blood donors from the United States. Prior to the pandemic, Sierra Leoneans had more frequent exposures than Americans to coronaviruses with epitopes that cross-react with severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), SARS-CoV, and Middle Eastern respiratory syndrome coronavirus (MERS-CoV). The percentage of Sierra Leoneans with antibodies reacting to seasonal coronaviruses was also higher than for American blood donors. Serological responses to coronaviruses by Sierra Leoneans did not differ by age or sex. Approximately a quarter of Sierra Leonian pre-pandemic blood samples had neutralizing antibodies against SARS-CoV-2 pseudovirus, while about a third neutralized MERS-CoV pseudovirus. Prior exposures to coronaviruses that induce cross-protective immunity may contribute to reduced COVID-19 cases and deaths in Sierra Leone.
AbstractList Many countries in sub-Saharan Africa have experienced lower COVID-19 caseloads and fewer deaths than countries in other regions worldwide. Under-reporting of cases and a younger population could partly account for these differences, but pre-existing immunity to coronaviruses is another potential factor. Blood samples from Sierra Leonean Lassa fever and Ebola survivors and their contacts collected before the first reported COVID-19 cases were assessed using enzyme-linked immunosorbent assays for the presence of antibodies binding to proteins of coronaviruses that infect humans. Results were compared to COVID-19 subjects and healthy blood donors from the United States. Prior to the pandemic, Sierra Leoneans had more frequent exposures than Americans to coronaviruses with epitopes that cross-react with severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), SARS-CoV, and Middle Eastern respiratory syndrome coronavirus (MERS-CoV). The percentage of Sierra Leoneans with antibodies reacting to seasonal coronaviruses was also higher than for American blood donors. Serological responses to coronaviruses by Sierra Leoneans did not differ by age or sex. Approximately a quarter of Sierra Leonian pre-pandemic blood samples had neutralizing antibodies against SARS-CoV-2 pseudovirus, while about a third neutralized MERS-CoV pseudovirus. Prior exposures to coronaviruses that induce cross-protective immunity may contribute to reduced COVID-19 cases and deaths in Sierra Leone.
Many countries in sub-Saharan Africa have experienced lower COVID-19 caseloads and fewer deaths than countries in other regions worldwide. Under-reporting of cases and a younger population could partly account for these differences, but pre-existing immunity to coronaviruses is another potential factor. Blood samples from Sierra Leonean Lassa fever and Ebola survivors and their contacts collected before the first reported COVID-19 cases were assessed using enzyme-linked immunosorbent assays for the presence of antibodies binding to proteins of coronaviruses that infect humans. Results were compared to COVID-19 subjects and healthy blood donors from the United States. Prior to the pandemic, Sierra Leoneans had more frequent exposures than Americans to coronaviruses with epitopes that cross-react with severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), SARS-CoV, and Middle Eastern respiratory syndrome coronavirus (MERS-CoV). The percentage of Sierra Leoneans with antibodies reacting to seasonal coronaviruses was also higher than for American blood donors. Serological responses to coronaviruses by Sierra Leoneans did not differ by age or sex. Approximately a quarter of Sierra Leonian pre-pandemic blood samples had neutralizing antibodies against SARS-CoV-2 pseudovirus, while about a third neutralized MERS-CoV pseudovirus. Prior exposures to coronaviruses that induce cross-protective immunity may contribute to reduced COVID-19 cases and deaths in Sierra Leone.Many countries in sub-Saharan Africa have experienced lower COVID-19 caseloads and fewer deaths than countries in other regions worldwide. Under-reporting of cases and a younger population could partly account for these differences, but pre-existing immunity to coronaviruses is another potential factor. Blood samples from Sierra Leonean Lassa fever and Ebola survivors and their contacts collected before the first reported COVID-19 cases were assessed using enzyme-linked immunosorbent assays for the presence of antibodies binding to proteins of coronaviruses that infect humans. Results were compared to COVID-19 subjects and healthy blood donors from the United States. Prior to the pandemic, Sierra Leoneans had more frequent exposures than Americans to coronaviruses with epitopes that cross-react with severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), SARS-CoV, and Middle Eastern respiratory syndrome coronavirus (MERS-CoV). The percentage of Sierra Leoneans with antibodies reacting to seasonal coronaviruses was also higher than for American blood donors. Serological responses to coronaviruses by Sierra Leoneans did not differ by age or sex. Approximately a quarter of Sierra Leonian pre-pandemic blood samples had neutralizing antibodies against SARS-CoV-2 pseudovirus, while about a third neutralized MERS-CoV pseudovirus. Prior exposures to coronaviruses that induce cross-protective immunity may contribute to reduced COVID-19 cases and deaths in Sierra Leone.
Author Branco, Zoe L.
Bell-Kareem, Antoinette R.
Grant, Donald S.
Fusco, Dahlene N.
Smither, Allison R.
Rowland, Megan M.
Momoh, Mambu
Schieffelin, John S.
Goba, Augustine
Gbakie, Michael
Koval, Sophia A.
Shaffer, Jeffrey G.
Snarski, Patricia
Kanneh, Lansana
Elliott, Debra H.
Chao, Karissa
Boisen, Matthew L.
Koval, Anatoliy P.
Smira, Ashley A.
Bush, Duane J.
Sabeti, Pardis C.
Lathigra, Raju
Hoffmann, Andrew R.
Sabino-Santos, Gilberto
Phinney, Whitney N.
Branco, Luis M.
Drouin, Arnaud C.
Borrega, Rodrigo
Sandi, John Demby
Robinson, James E.
Bond, Nell G.
Heinrich, Megan L.
Harrell, Jaikin E.
Melnik, Lilia I.
Nelson, Diana K. S.
Genemaras, Kaylynn J.
Samuels, Robert J.
Melton, Alexandra B.
Garry, Robert F.
Aimukanova, Irina
Rouelle, Julie A.
Andersen, Kristian G.
AuthorAffiliation 13 Viral Hemorrhagic Fever Program, Kenema Government Hospital, Kenema, Sierra Leone; johnatsandi@gmail.com (J.D.S.); augstgoba@yahoo.com (A.G.); robert.j.samuels@vanderbilt.edu (R.J.S.); Lansanakanneh@gmail.com (L.K.); gbakiemichael@gmail.com (M.G.)
16 Department of Internal Medicine, School of Medicine, Tulane University, New Orleans, LA 70112, USA
14 Ministry of Health and Sanitation, Freetown, Sierra Leone
19 Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA
2 Zalgen Labs, LCC, Broomfield, CO 80045, USA; dnelson@zalgenlabs.com (D.K.S.N.); dbush@zalgenlabs.com (D.J.B.); iaimukanova@zalgenlabs.com (I.A.); wphinney@zalgenlabs.com (W.N.P.)
12 Eastern Polytechnic Institute, Kenema, Sierra Leone; mmomoh@tulane.edu
18 Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA
7 Department of Microbiology, Tulane National Primate Research Center, Covington, LA 70433, USA; amelton@tulane.edu
6 Department of Physiology, School of Medicine, Tulane Univer
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BackLink https://www.ncbi.nlm.nih.gov/pubmed/34835131$$D View this record in MEDLINE/PubMed
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2021 by the authors. 2021
Copyright_xml – notice: 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.
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Issue 11
Keywords severe acute respiratory syndrome coronavirus-2
sub-Saharan Africa
pseudovirus neutralizing antibodies
enzyme-linked immunosorbent assays
pre-existing immunity to coronaviruses
COVID-19 caseloads and deaths
recombinant antigens
Middle Eastern respiratory syndrome coronavirus
Language English
License https://creativecommons.org/licenses/by/4.0
Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
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These authors equally contributed to this work.
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Snippet Many countries in sub-Saharan Africa have experienced lower COVID-19 caseloads and fewer deaths than countries in other regions worldwide. Under-reporting of...
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SubjectTerms Age Distribution
Alphacoronavirus - immunology
Antibodies
Antibodies, Neutralizing - blood
Antibodies, Neutralizing - immunology
Antibodies, Viral - blood
Antibodies, Viral - immunology
Antigens
Antigens, Viral - immunology
Betacoronavirus - immunology
blood
Blood & organ donations
Blood Donors
Coronaviridae
Coronavirus Nucleocapsid Proteins - immunology
Coronaviruses
COVID-19
COVID-19 - immunology
COVID-19 caseloads and deaths
COVID-19 infection
cross immunity
Cross Protection
Cross Reactions
E coli
Ebola virus
enzyme-linked immunosorbent assays
Epitopes
Female
Fever
Humans
Infections
Infectious diseases
Lassa fever
Lassa virus fever
Male
Medical research
Middle East respiratory syndrome
Middle East Respiratory Syndrome Coronavirus - immunology
pandemic
Pandemics
Phosphoproteins - immunology
pre-existing immunity to coronaviruses
Proteins
Pseudovirus
pseudovirus neutralizing antibodies
recombinant antigens
SARS-CoV-2 - immunology
Serology
Severe acute respiratory syndrome coronavirus 2
Sierra Leone
sub-Saharan Africa
United States
Viral Pseudotyping
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Title Cross-Reactive Antibodies to SARS-CoV-2 and MERS-CoV in Pre-COVID-19 Blood Samples from Sierra Leoneans
URI https://www.ncbi.nlm.nih.gov/pubmed/34835131
https://www.proquest.com/docview/2602203177
https://www.proquest.com/docview/2604025142
https://www.proquest.com/docview/2636510377
https://pubmed.ncbi.nlm.nih.gov/PMC8625389
https://doaj.org/article/27d9109965114b0bbc7de5dfd8613f6a
Volume 13
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