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SARS coronavirus spike polypeptide DNA vaccine priming with recombinant spike polypeptide from Escherichia coli as booster induces high titer of neutralizing antibody against SARS coronavirus.

Identifieur interne : 004928 ( Main/Merge ); précédent : 004927; suivant : 004929

SARS coronavirus spike polypeptide DNA vaccine priming with recombinant spike polypeptide from Escherichia coli as booster induces high titer of neutralizing antibody against SARS coronavirus.

Auteurs : Patrick C Y. Woo [Hong Kong] ; Susanna K P. Lau ; Hoi-Wah Tsoi ; Zhi-Wei Chen ; Beatrice H L. Wong ; Linqi Zhang ; Jim K H. Chan ; Lei-Po Wong ; Wei He ; Chi Ma ; Kwok-Hung Chan ; David D. Ho ; Kwok-Yung Yuen

Source :

RBID : pubmed:15993989

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English descriptors

Abstract

Different forms of SARS coronavirus (SARS-CoV) spike protein-based vaccines for generation of neutralizing antibody response against SARS-CoV were compared using a mouse model. High IgG levels were detected in mice immunized with intraperitoneal (i.p.) recombinant spike polypeptide generated by Escherichia coli (S-peptide), mice primed with intramuscular (i.m.) tPA-optimize800 DNA vaccine (tPA-S-DNA) and boosted with i.p. S-peptide, mice primed with i.m. CTLA4HingeSARS800 DNA vaccine (CTLA4-S-DNA) and boosted with i.p. S-peptide, mice primed with oral live-attenuated Salmonella typhimurium (Salmonella-S-DNA-control) and boosted with i.p. S-peptide, mice primed with oral live-attenuated S. typhimurium that contained tPA-optimize800 DNA vaccine (Salmonella-tPA-S-DNA) and boosted with i.p. S-peptide, and mice primed with oral live-attenuated S. typhimurium that contained CTLA4HingeSARS800 DNA vaccine (Salmonella-tPA-S-DNA) and boosted with i.p. S-peptide. No statistical significant difference was observed among the Th1/Th2 index among these six groups of mice with high IgG levels. Sera of all six mice immunized with i.p. S-peptide, i.m. DNA vaccine control and oral Salmonella-S-DNA-control showed no neutralizing antibody against SARS-CoV. Sera of the mice immunized with i.m. tPA-S-DNA, i.m. CTLA4-S-DNA, oral Salmonella-S-DNA-control boosted with i.p. S-peptide, oral Salmonella-tPA-S-DNA, oral Salmonella-tPA-S-DNA boosted with i.p S-peptide, oral Salmonella-CTLA4-S-DNA and oral Salmonella-CTLA4-S-DNA boosted with i.p. S-peptide showed neutralizing antibody titers of <1:20-1:160. Sera of all the mice immunized with i.m. tPA-S-DNA boosted with i.p. S-peptide and i.m. CTLA4-S-DNA boosted with i.p. S-peptide showed neutralizing antibody titers of >or=1:1280. The present observation may have major practical value, such as immunization of civet cats, since production of recombinant proteins from E. coli is far less expensive than production of recombinant proteins using eukaryotic systems.

DOI: 10.1016/j.vaccine.2005.05.023
PubMed: 15993989

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<term>Bacterial Vaccines (administration & dosage)</term>
<term>Bacterial Vaccines (immunology)</term>
<term>Escherichia coli Proteins</term>
<term>Immunization Schedule</term>
<term>Immunization, Secondary</term>
<term>Immunoglobulin G (blood)</term>
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<term>Injections, Intraperitoneal</term>
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<term>Interleukin-4 (analysis)</term>
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<term>Membrane Glycoproteins (administration & dosage)</term>
<term>Membrane Glycoproteins (genetics)</term>
<term>Membrane Glycoproteins (immunology)</term>
<term>Mice</term>
<term>Mice, Inbred BALB C</term>
<term>Models, Animal</term>
<term>Neutralization Tests</term>
<term>SARS Virus (immunology)</term>
<term>Severe Acute Respiratory Syndrome (prevention & control)</term>
<term>Spike Glycoprotein, Coronavirus</term>
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<term>Viral Envelope Proteins (genetics)</term>
<term>Viral Envelope Proteins (immunology)</term>
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<term>Injections péritoneales</term>
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<front>
<div type="abstract" xml:lang="en">Different forms of SARS coronavirus (SARS-CoV) spike protein-based vaccines for generation of neutralizing antibody response against SARS-CoV were compared using a mouse model. High IgG levels were detected in mice immunized with intraperitoneal (i.p.) recombinant spike polypeptide generated by Escherichia coli (S-peptide), mice primed with intramuscular (i.m.) tPA-optimize800 DNA vaccine (tPA-S-DNA) and boosted with i.p. S-peptide, mice primed with i.m. CTLA4HingeSARS800 DNA vaccine (CTLA4-S-DNA) and boosted with i.p. S-peptide, mice primed with oral live-attenuated Salmonella typhimurium (Salmonella-S-DNA-control) and boosted with i.p. S-peptide, mice primed with oral live-attenuated S. typhimurium that contained tPA-optimize800 DNA vaccine (Salmonella-tPA-S-DNA) and boosted with i.p. S-peptide, and mice primed with oral live-attenuated S. typhimurium that contained CTLA4HingeSARS800 DNA vaccine (Salmonella-tPA-S-DNA) and boosted with i.p. S-peptide. No statistical significant difference was observed among the Th1/Th2 index among these six groups of mice with high IgG levels. Sera of all six mice immunized with i.p. S-peptide, i.m. DNA vaccine control and oral Salmonella-S-DNA-control showed no neutralizing antibody against SARS-CoV. Sera of the mice immunized with i.m. tPA-S-DNA, i.m. CTLA4-S-DNA, oral Salmonella-S-DNA-control boosted with i.p. S-peptide, oral Salmonella-tPA-S-DNA, oral Salmonella-tPA-S-DNA boosted with i.p S-peptide, oral Salmonella-CTLA4-S-DNA and oral Salmonella-CTLA4-S-DNA boosted with i.p. S-peptide showed neutralizing antibody titers of <1:20-1:160. Sera of all the mice immunized with i.m. tPA-S-DNA boosted with i.p. S-peptide and i.m. CTLA4-S-DNA boosted with i.p. S-peptide showed neutralizing antibody titers of >or=1:1280. The present observation may have major practical value, such as immunization of civet cats, since production of recombinant proteins from E. coli is far less expensive than production of recombinant proteins using eukaryotic systems.</div>
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