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New Vaccine May Protect Against All Four Strains Of Dengue Virus

Date:
July 23, 2008
Source:
American Society for Microbiology
Summary:
Researchers have developed a novel four-component vaccine that protects monkeys against all four strains of dengue virus and may potentially offer protection to the millions of humans at risk worldwide.

Researchers from Maryland and South Carolina have developed a novel four-component vaccine that protects monkeys against all four strains of dengue virus and may potentially offer protection to the millions of humans at risk worldwide.

There are four distinct but similar strains of dengue virus causing more than 100 million annual infections worldwide. Tropical regions are at especially high risk where illness may range from mild symptoms to potentially fatal forms of dengue hemorrhagic fever and dengue shock syndrome. With all four strains of the virus sharing similar clinical presentation, epidemiology, and distribution, development of a vaccine offering multi-faceted protection has become a global health priority.

In the study researchers developed a tetravalent dengue virus vaccine by combining genes and proteins from all four dengue virus types as well as incorporating an adenovirus agent. Following intramuscular vaccination, rhesus macaques showed high antibody levels that neutralized all four of the dengue virus types.

To further test the sustainability of the protective immune response, two separate live-virus challenges were administered at 4 and 24 weeks after the final inoculation. Results showed complete protection against dengue types 1 and 3 and significant protection against types 2 and 4.

"Results reported here demonstrate that the tetravalent dengue vaccine elicited a neutralizing antibody response to all four dengue virus stereotypes and provided both short-term and long-term protection against challenges from each of the four serotypes," say the researchers.


Story Source:

The above story is based on materials provided by American Society for Microbiology. Note: Materials may be edited for content and length.


Journal Reference:

  1. K. Raviprakash, D. Wang, D. Ewing, D.H. Holman, K. Block, J. Woraratanadharm, L. Chen, C. Hayes, J.Y. Dong, K. Porter. A tetravalent dengue virus vaccine based on a complex adenovirus vector provides significant protection in rhesus monkeys against all four serotypes of dengue virus. Journal of Virology, 82. 14: 6927-6934

Cite This Page:

American Society for Microbiology. "New Vaccine May Protect Against All Four Strains Of Dengue Virus." ScienceDaily. ScienceDaily, 23 July 2008. <www.sciencedaily.com/releases/2008/07/080722091648.htm>.
American Society for Microbiology. (2008, July 23). New Vaccine May Protect Against All Four Strains Of Dengue Virus. ScienceDaily. Retrieved April 18, 2014 from www.sciencedaily.com/releases/2008/07/080722091648.htm
American Society for Microbiology. "New Vaccine May Protect Against All Four Strains Of Dengue Virus." ScienceDaily. www.sciencedaily.com/releases/2008/07/080722091648.htm (accessed April 18, 2014).

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