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  • Công bố khoa học và công nghệ Việt Nam

34.43

Sinh học

Võ Viết Cường, Nguyễn Thị Quý, Nguyễn Thanh Ngọc, Le Thị Thu Hồng, Đỗ Thị Huyền(1), Trương Văn Dung(2), Trương Nam Hải

Đánh giá khả năng sinh đáp ứng miễn dịch trên gà của kháng nguyên HA (TRXHA5.1M) tái tổ hợp biểu hiện trong Pichia pastoris

Immunogenicity of recombinant TrxHA5.1 M protein expressed in Pichia pasloris in chickens

Sinh học

2013

4

461-468

0866-7160

Recombinant avian influenza vaccines offer several advantages over the conventional vaccines. In this study, the methylotropic yeast Pichia pastoris SMD1168 carrying a fusion gene TrxHA5.1M (coding for Trx and subunit HA1 of hemaglutinin antigen derived from highly pathogenic avian influenza H5N1) was used to produce TrxHA5.1 M. The recombinant protein was suffered from glycosylation and protease processing. The TrxHA5.1M was partly purified by precipitation with 60 percent ammonium sulfate (mass/volumn) or purified using Co-NTA affinity chromatography. The doses of 100 ug TrxHA5.1M were immunized for two week-old chickens by subcutaneous injection or by intranasal administration for assessment of' TrxHA5.1M immunogenicity. In subcutaneous injection chickens groups, haemagglutinin inhibition (HI) titer of chickens sera harvested after 2 weeks of booster immunization reached 7.0-7.2 log2. In intranasal immunization groups, HI titers were about 6.6-7.0 log2. There had no any significant difference in HI titers of sera from chickens immunized with partly purified or purified recombinant proteins.

TTKHCNQG, CVv 27