Details:

Alternative Title:
PLoS Neglected Tropical Diseases
Personal Author:
Huang, Claire Y.-H. ; Kinney, Richard M. ; Livengood, Jill A. ; Bolling, Bethany ; Arguello, John J. ; ... More +
Huang, Claire Y.-H. ; Kinney, Richard M. ; Livengood, Jill A. ; Bolling, Bethany ; Arguello, John J. ; Luy, Betty E. ; Silengo, Shawn J. ; Boroughs, Karen L. ; Stovall, Janae L. ; Kalanidhi, Akundi P. ; Brault, Aaron C. ; Osorio, Jorge E. ; Stinchcomb, Dan T. Less -
Description:
Background

We have developed a manufacturing strategy that can improve the safety and genetic stability of recombinant live-attenuated chimeric dengue vaccine (DENVax) viruses. These viruses, containing the pre-membrane (prM) and envelope (E) genes of dengue serotypes 1–4 in the replicative background of the attenuated dengue-2 PDK-53 vaccine virus candidate, were manufactured under cGMP.

Methodology/Principal Findings

After deriving vaccine viruses from RNA-transfected Vero cells, six plaque-purified viruses for each serotype were produced. The plaque-purified strains were then analyzed to select one stock for generation of the master seed. Full genetic and phenotypic characterizations of the master virus seeds were conducted to ensure these viruses retained the previously identified attenuating determinants and phenotypes of the vaccine viruses. We also assessed vector competence of the vaccine viruses in sympatric (Thai) Aedes aegypti mosquito vectors.

Conclusion/Significance

All four serotypes of master vaccine seeds retained the previously defined safety features, including all three major genetic loci of attenuation, small plaques, temperature sensitivity in mammalian cells, reduced replication in mosquito cell cultures, and reduced neurovirulence in new-born mice. In addition, the candidate vaccine viruses demonstrated greatly reduced infection and dissemination in Aedes aegypti mosquitoes, and are not likely to be transmissible by these mosquitoes. This manufacturing strategy has successfully been used to produce the candidate tetravalent vaccine, which is currently being tested in human clinical trials in the United States, Central and South America, and Asia.


Subjects:
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Aedes Animals Animals, Newborn Cell Line Dengue Dengue Vaccines Dengue Virus Disease Models, Animal Female Genomic Instability Mice Mice, Inbred ICR Quality Control Technology, Pharmaceutical Temperature Vaccines, Attenuated Vaccines, Synthetic Viral Plaque Assay Virulence Virus Replication
Source:
PLoS Neglected Tropical Diseases. 2013; 7(5).
Document Type:
Journal Article
Collection(s):
CDC Public Access
Main Document Checksum:
[+]
urn:sha256:830ab0c7a9d221d7b6e3d9bf2825090221bc725207e51b236016b4111a290188
Download URL:
https://stacks.cdc.gov/view/cdc/13649/cdc_13649_DS1.pdf
File Type:

Supporting Files

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