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A subcutaneously injected UV-inactivated SARS coronavirus vaccine elicits systemic humoral immunity in mice

Identifieur interne : 005A01 ( Main/Exploration ); précédent : 005A00; suivant : 005A02

A subcutaneously injected UV-inactivated SARS coronavirus vaccine elicits systemic humoral immunity in mice

Auteurs : Naomi Takasuka ; Hideki Fujii ; Yoshimasa Takahashi ; Masataka Kasai ; Shigeru Morikawa ; Shigeyuki Itamura ; Koji Ishii ; Masahiro Sakaguchi ; Kazuo Ohnishi ; Masamichi Ohshima ; Shu-Ichi Hashimoto ; Takato Odagiri ; Masato Tashiro ; Hiroshi Yoshikura [Japon] ; Toshitada Takemori ; Yasuko Tsunetsugu-Yokota

Source :

RBID : ISTEX:506B90F83AAF56295C5A0D6DAC109CB6DB03EC54

Descripteurs français

English descriptors

Abstract

The recent emergence of severe acute respiratory syndrome (SARS) was caused by a novel coronavirus, SARS-CoV. It spread rapidly to many countries and developing a SARS vaccine is now urgently required. In order to study the immunogenicity of UV-inactivated purified SARS-CoV virion as a vaccine candidate, we subcutaneously immunized mice with UV-inactivated SARS-CoV with or without an adjuvant. We chose aluminum hydroxide gel (alum) as an adjuvant, because of its long safety history for human use. We observed that the UV-inactivated SARS-CoV virion elicited a high level of humoral immunity, resulting in the generation of long-term antibody secreting and memory B cells. With the addition of alum to the vaccine formula, serum IgG production was augmented and reached a level similar to that found in hyper-immunized mice, though it was still insufficient to elicit serum IgA antibodies. Notably, the SARS-CoV virion itself was able to induce long-term antibody production even without an adjuvant. Anti-SARS-CoV antibodies elicited in mice recognized both the spike and nucleocapsid proteins of the virus and were able to neutralize the virus. Furthermore, the UV-inactivated virion induced regional lymph node T-cell proliferation and significant levels of cytokine production (IL-2, IL-4, IL-5, IFN-γ and TNF-α) upon restimulation with inactivated SARS-CoV virion in vitro. Thus, a whole killed virion could serve as a candidate antigen for a SARS vaccine to elicit both humoral and cellular immunity.

Url:
DOI: 10.1093/intimm/dxh143


Affiliations:


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Le document en format XML

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<term>Adjuvants, Immunologic (administration & dosage)</term>
<term>Alum Compounds (administration & dosage)</term>
<term>Animals</term>
<term>Antibody Formation</term>
<term>Antibody Specificity</term>
<term>Blotting, Western</term>
<term>Immunoglobulin G (blood)</term>
<term>Injections, Subcutaneous</term>
<term>Mice</term>
<term>SARS Virus (immunology)</term>
<term>Severe Acute Respiratory Syndrome (prevention & control)</term>
<term>Vaccines, Inactivated (administration & dosage)</term>
<term>Viral Proteins (immunology)</term>
<term>Viral Vaccines (administration & dosage)</term>
<term>Virion (immunology)</term>
</keywords>
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<term>Adjuvants immunologiques (administration et posologie)</term>
<term>Alun (administration et posologie)</term>
<term>Animaux</term>
<term>Immunoglobuline G (sang)</term>
<term>Injections sous-cutanées</term>
<term>Production d'anticorps</term>
<term>Protéines virales (immunologie)</term>
<term>Souris</term>
<term>Spécificité des anticorps</term>
<term>Syndrome respiratoire aigu sévère ()</term>
<term>Technique de Western</term>
<term>Vaccins antiviraux (administration et posologie)</term>
<term>Vaccins inactivés (administration et posologie)</term>
<term>Virion (immunologie)</term>
<term>Virus du SRAS (immunologie)</term>
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<term>Alum Compounds</term>
<term>Vaccines, Inactivated</term>
<term>Viral Vaccines</term>
</keywords>
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<term>Immunoglobulin G</term>
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<term>Adjuvants immunologiques</term>
<term>Alun</term>
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<front>
<div type="abstract" xml:lang="en">The recent emergence of severe acute respiratory syndrome (SARS) was caused by a novel coronavirus, SARS-CoV. It spread rapidly to many countries and developing a SARS vaccine is now urgently required. In order to study the immunogenicity of UV-inactivated purified SARS-CoV virion as a vaccine candidate, we subcutaneously immunized mice with UV-inactivated SARS-CoV with or without an adjuvant. We chose aluminum hydroxide gel (alum) as an adjuvant, because of its long safety history for human use. We observed that the UV-inactivated SARS-CoV virion elicited a high level of humoral immunity, resulting in the generation of long-term antibody secreting and memory B cells. With the addition of alum to the vaccine formula, serum IgG production was augmented and reached a level similar to that found in hyper-immunized mice, though it was still insufficient to elicit serum IgA antibodies. Notably, the SARS-CoV virion itself was able to induce long-term antibody production even without an adjuvant. Anti-SARS-CoV antibodies elicited in mice recognized both the spike and nucleocapsid proteins of the virus and were able to neutralize the virus. Furthermore, the UV-inactivated virion induced regional lymph node T-cell proliferation and significant levels of cytokine production (IL-2, IL-4, IL-5, IFN-γ and TNF-α) upon restimulation with inactivated SARS-CoV virion in vitro. Thus, a whole killed virion could serve as a candidate antigen for a SARS vaccine to elicit both humoral and cellular immunity.</div>
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