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[Characterization of cold-adapted influenza strain A/HongKong/1/68/162/35 as a potential donor of attenuation and high reproduction].
- Source :
-
Voprosy virusologii [Vopr Virusol] 2012 Nov-Dec; Vol. 57 (6), pp. 13-7. - Publication Year :
- 2012
-
Abstract
- Live and inactivated vaccines are currently produced using virus reassortants originating from various gene donors of internal proteins. Based on the pandemic virus A/Hong Kong/1/68 (H3N2), a cold-adapted thermo-sensitive strain A/Hong Kong/1/68/162/35 was generated. It is distinguished for its high reproductive capacity (9-9.5 lg EID50), and hemagglutinating activity (1:1024-1:2048). The strain has ts and ca phenotype: reproductive capacity at t = 39 degrees C is 1.0 lg EID50; at t = 26 degrees C, 8.5 lg EID50. A total of 16 mutations have emerged from comprehensive sequencing of the virus genome. Among them 10 mutations were located in the genes of polymerase complex and NP, with respective amino-acid substitutions. The stability of strain characteristics, such as attenuation to humans and high reproductive capacity, were confirmed by repeated sequencing of the genome after tenfold passing of the virus in chicken embryos. Reassortants of the strain A/Hong Kong/1/68/162/35 with the wild-type viruses have inherited useful features of donor virus.
- Subjects :
- Cold Temperature
Humans
Mutation
Reassortant Viruses genetics
Temperature
Viral Proteins genetics
Influenza A Virus, H3N2 Subtype genetics
Influenza A Virus, H3N2 Subtype immunology
Influenza Vaccines genetics
Influenza, Human genetics
Influenza, Human prevention & control
Influenza, Human virology
Vaccines, Attenuated
Subjects
Details
- Language :
- Russian
- ISSN :
- 0507-4088
- Volume :
- 57
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Voprosy virusologii
- Publication Type :
- Academic Journal
- Accession number :
- 23477248