The potential significance of high avidity immunoglobulin G (IgG) for protective immunity towards SARS-CoV-2

Abstract: Background
Avidity is defined as the strength of binding between immunoglobulin G (IgG) and its specific target epitope. IgG of high avidity is established during affinity maturation. Failure to achieve high avidity IgG may result in a lack of protective immunity towards infection and disease. It is known that the interaction between SARS-CoV-2 spike protein and its cellular receptor is driven by high affinity. Therefore, it is predictable that protective antibodies towards SARS-CoV-2 should show high affinity/avidity.

Avidity after SARS-CoV-2 infection
Recent findings by several groups demonstrate that the serological response towards infection with SARS-CoV-2 and seasonal coronaviruses is characterized by incomplete avidity maturation, followed by a decline of the serological response. This response might facilitate reinfection, prevent herd immunity and potentially allow repeated cycles of infection.

Consequences for vaccination towards SARS-CoV-2
Therefore, the sole focus on antibody titers reached after vaccination towards SARS-CoV-2 might not be sufficient to evaluate the degree of achieved protection. Rather, it is suggested to include avidity determination to optimize vaccination protocols and achieve high avidity IgG directed towards SARS-CoV-2 through vaccination. Avidity determination might also be useful to control for truly protective immunity towards SARS-CoV-2 in individual cases

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch
Notes
International journal of infectious diseases. - 106 (2021) , 61-64, ISSN: 1878-3511

Event
Veröffentlichung
(where)
Freiburg
(who)
Universität
(when)
2021
Creator

DOI
10.1016/j.ijid.2021.01.061
URN
urn:nbn:de:bsz:25-freidok-1945610
Rights
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Last update
25.03.2025, 1:55 PM CET

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Time of origin

  • 2021

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