Studies of SARS virus vaccines

Hong Kong Med J. 2008 Aug:14 Suppl 4:39-43.

Abstract

1. Intranasal vaccination using inactivated SARS coronavirus (SARS-CoV) vaccine with adjuvant can induce strong systemic (serum immunoglobulin [Ig] G) and respiratory tract local (tracheal-lung wash fluid IgA) antibody responses with neutralising activity. 2. RBD-Fc (protein-based vaccine) is able to induce effective neutralising antibodies able to provide protection from SARS-CoV infection in animal models. 3. A single dose of RBD-rAAV vaccination can induce adequate neutralising antibody against SARS-CoV infection. 4. Additional doses of vaccine increased the production of neutralising antibody 5-fold compared with a single dose. 5. RBD-rAAV vaccination provoked a prolonged antibody response with continually increasing levels of neutralising activity. 6. Intranasal vaccination with RBD-rAAV induced local IgA and systemic IgG neutralising antibodies and specific T-cell responses, able to protect against SARS-CoV infection in animal models. 7. When compared with the RBD-rAAV prime/boost vaccination, RBD-rAAV prime/RBD-peptide boost induced similar levels of Th1 and neutralising antibody responses that protected vaccinated mice from subsequent SARS-CoV challenges,but stronger Th2 and CTL responses. 8. Overall, our findings suggest that the inactivated vaccine, RBD-Fc and RBD-rAAV, can be further developed into effective and safe vaccines against SARS and that intranasal vaccination may be the preferred route of administration.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Administration, Intranasal
  • Animals
  • Communicable Disease Control*
  • Disease Models, Animal
  • Disease Outbreaks / prevention & control
  • Female
  • Forecasting
  • Hong Kong
  • Humans
  • Injections, Intramuscular
  • Male
  • Mice
  • Predictive Value of Tests
  • Risk Assessment
  • Severe Acute Respiratory Syndrome / epidemiology
  • Severe Acute Respiratory Syndrome / immunology
  • Severe Acute Respiratory Syndrome / prevention & control*
  • Severe acute respiratory syndrome-related coronavirus / immunology*
  • Vaccination / statistics & numerical data*
  • Vaccines, Inactivated / administration & dosage
  • Viral Vaccines / administration & dosage*
  • Viral Vaccines / immunology
  • Viral Vaccines / pharmacology

Substances

  • Vaccines, Inactivated
  • Viral Vaccines