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Trefry JC, Wollen SE, Nasar F, Shamblin JD, Kern SJ, Bearss JJ, Jefferson MA, Chance TB, Kugelman JR, Ladner JT, Honko AN, Kobs DJ, Wending MQS, Sabourin CL, Pratt WD, Palacios GF, Pitt MLM. Ebola Virus Infections in Nonhuman Primates Are Temporally Influenced by Glycoprotein Poly-U Editing Site Populations in the Exposure Material. Viruses 2015; 7:6739-54. [PMID: 26703716 PMCID: PMC4690892 DOI: 10.3390/v7122969] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 12/03/2015] [Accepted: 12/07/2015] [Indexed: 01/04/2023] Open
Abstract
Recent experimentation with the variants of the Ebola virus that differ in the glycoprotein's poly-uridine site, which dictates the form of glycoprotein produced through a transcriptional stutter, has resulted in questions regarding the pathogenicity and lethality of the stocks used to develop products currently undergoing human clinical trials to combat the disease. In order to address these concerns and prevent the delay of these critical research programs, we designed an experiment that permitted us to intramuscularly challenge statistically significant numbers of naïve and vaccinated cynomolgus macaques with either a 7U or 8U variant of the Ebola virus, Kikwit isolate. In naïve animals, no difference in survivorship was observed; however, there was a significant delay in the disease course between the two groups. Significant differences were also observed in time-of-fever, serum chemistry, and hematology. In vaccinated animals, there was no statistical difference in survivorship between either challenge groups, with two succumbing in the 7U group compared to 1 in the 8U challenge group. In summary, survivorship was not affected, but the Ebola virus disease course in nonhuman primates is temporally influenced by glycoprotein poly-U editing site populations.
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Affiliation(s)
- John C Trefry
- Virology Division, US Army Medical Research Institute for Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA.
| | - Suzanne E Wollen
- Virology Division, US Army Medical Research Institute for Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA.
| | - Farooq Nasar
- Virology Division, US Army Medical Research Institute for Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA.
| | - Joshua D Shamblin
- Virology Division, US Army Medical Research Institute for Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA.
| | - Steven J Kern
- Virology Division, US Army Medical Research Institute for Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA.
| | - Jeremy J Bearss
- Pathology Division, U.S. Army Medical Research Institute of Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA.
| | - Michelle A Jefferson
- Pathology Division, U.S. Army Medical Research Institute of Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA.
| | - Taylor B Chance
- Pathology Division, U.S. Army Medical Research Institute of Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA.
| | - Jeffery R Kugelman
- Molecular and Translational Sciences, U.S. Army Medical Research Institute of Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA.
| | - Jason T Ladner
- Molecular and Translational Sciences, U.S. Army Medical Research Institute of Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA.
| | - Anna N Honko
- Virology Division, US Army Medical Research Institute for Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA.
| | - Dean J Kobs
- Battelle Memorial Institute, 505 King Ave., Columbus, OH 43201, USA.
| | | | - Carol L Sabourin
- Battelle Memorial Institute, 505 King Ave., Columbus, OH 43201, USA.
| | - William D Pratt
- Virology Division, US Army Medical Research Institute for Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA.
| | - Gustavo F Palacios
- Molecular and Translational Sciences, U.S. Army Medical Research Institute of Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA.
| | - M Louise M Pitt
- Virology Division, US Army Medical Research Institute for Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA.
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