Genetic engineering of live rabies vaccines

Vaccine. 2001 May 14;19(25-26):3543-51. doi: 10.1016/s0264-410x(01)00064-0.

Abstract

Rabies virus is not a single entity but consists of a wide array of variants that are each associated with different host species. These viruses differ greatly in the antigenic makeup of their G proteins, the primary determinant of pathogenicity and major inducer of protective immunity. Due to this diversity, existing rabies vaccines have largely been targeted to individual animal species. In this report, a novel approach to the development of rabies vaccines using genetically modified, reverse-engineered live attenuated rabies viruses is described. This approach entails the engineering of vaccine rabies virus containing G proteins from virulent strains and modification of the G protein to further reduce pathogenicity. Strategies employed included exchange of the arginine at position 333 for glutamine and modification of the cytoplasmic domain. The recombinant viruses obtained were non-neuroinvasive when administered via a peripheral route. The ability to confer protective immunity depended largely upon conservation of the G protein antigenic structure between the vaccine and challenge virus, as well as on the route of immunization.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Antibodies, Viral / biosynthesis
  • Antigens, Viral / genetics
  • Base Sequence
  • DNA Primers / genetics
  • Female
  • Genetic Engineering
  • Glycoproteins / genetics
  • Glycoproteins / immunology
  • Injections, Intramuscular
  • Mice
  • Neutralization Tests
  • Rabies / immunology
  • Rabies / prevention & control
  • Rabies / veterinary
  • Rabies Vaccines / administration & dosage
  • Rabies Vaccines / genetics*
  • Rabies virus / genetics
  • Rabies virus / immunology
  • Rabies virus / pathogenicity
  • Vaccines, Attenuated / administration & dosage
  • Vaccines, Attenuated / genetics
  • Viral Envelope Proteins / genetics
  • Viral Envelope Proteins / immunology
  • Virulence / genetics
  • Virulence / immunology

Substances

  • Antibodies, Viral
  • Antigens, Viral
  • DNA Primers
  • Glycoproteins
  • Rabies Vaccines
  • Vaccines, Attenuated
  • Viral Envelope Proteins
  • glycoprotein G, Rabies virus