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A novel human parainfluenza virus type 1 (HPIV1) with separated P and C genes is useful for generating C gene mutants for evaluation as live-attenuated virus vaccine candidates
- Source :
-
Vaccine . Jan2010, Vol. 28 Issue 3, p767-779. 13p. - Publication Year :
- 2010
-
Abstract
- Abstract: A novel recombinant human parainfluenza virus type 1 (rHPIV1), rHPIV1-C+P, in which the overlapping open reading frames of the C and P genes were separated in order to introduce mutations into the C gene without affecting P, was generated. Infectious rHPIV1-C+P was readily recovered and replicated as efficiently as HPIV1 wild type (wt) in vitro and in African green monkeys (AGMs). rHPIV1-C+P expressed increased levels of C protein and, surprisingly, activated the type I IFN and apoptosis responses more strongly than HPIV1 wt. rHPIV1-C+P provided a useful backbone for recovering an attenuated P/C gene mutation (Δ84–85), which was previously unrecoverable, likely due to detrimental effects of the deletion on the P protein. rHPIV1-CΔ84–85+P and an additional mutant, rHPIV1-CΔ169–170+P, were found to replicate to similar titers in vitro and to activate the type I IFN and apoptosis responses to a similar degree as rHPIV1-C+P. rHPIV1-CΔ84–85+P was found to be highly attenuated in AGMs, and all viruses were immunogenic and effective in protecting AGMs against challenge with HPIV1 wt. rHPIV1-CΔ84–85+P will be investigated as a potential live-attenuated vaccine candidate for HPIV1. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 0264410X
- Volume :
- 28
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Vaccine
- Publication Type :
- Academic Journal
- Accession number :
- 45642354
- Full Text :
- https://doi.org/10.1016/j.vaccine.2009.10.069