Mechanisms of temperature sensitivity of attenuated Urabe mumps virus.
Virus Res
; 227: 104-109, 2017 01 02.
Article
in En
| MEDLINE
| ID: mdl-27720824
ABSTRACT
Temperature sensitivity is a phenotype often associated with attenuation of viruses. Previously, we purified several mumps variants from an incompletely attenuated Urabe strain live attenuated vaccine. Here we characterize one isolate that is sensitive to growth at high temperature. This virus was attenuated in a small animal model of mumps virulence, and we identified unique coding substitutions in the hemagglutinin-neuraminidase (HN), the viral polymerase (L) gene, and a non-coding substitution close to the anti-genome promoter sequences. At the non-permissive temperature, transcription of viral mRNAs and production of the replication intermediate were reduced compared to events at the permissive temperature and to a non-ts virulent Urabe virus. As well, synthesis of viral proteins was also reduced at the higher temperature. While the actual sequence substitutions in the ts virus were unique, the pattern of substitutions in HN, L and genome end sequences is similar to another attenuated Urabe virus previously described by us.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Temperature
/
Genetic Variation
/
Mumps virus
Type of study:
Diagnostic_studies
Limits:
Animals
Language:
En
Journal:
Virus Res
Journal subject:
VIROLOGIA
Year:
2017
Document type:
Article