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Study on rAd5F35-SIVenvT vaccine in combination with rMVA-SIVenvT vaccine in mice / 中华微生物学和免疫学杂志
Chinese Journal of Microbiology and Immunology ; (12): 455-459, 2021.
Article in Chinese | WPRIM | ID: wpr-912062
ABSTRACT

Objective:

To analyze the immune response in mice after immunization with vaccine of rAd5F35-SIVenvT in combination with rMVA-SIVenvT to evaluate the efficacy of different immunization strategies.

Methods:

Two recombinant viruses were identified in vitro by PCR and Western blot. The BALB/c mice were immunized with homologous and heterologous immune strategies. The numbers of splenic lymphocytes secreting IFN-γ were measured by ELISPOT assay, meanwhile SIV gp120 antibody titer were measured by ELISA assay.

Results:

SIVenvT protein was expressed effectively by rAd5F35-SIVenvT and rMVA-SIVenvT in HEK293 cells. The specific immune response reached its peak at 4-week post first immunization, then decreased. SIV Env specific cellular immune response and SIV gp120 specific antibody could be detected at 4-16 weeks post first immunization. The specific cellular response was significant stronger in heterologous immunization group than homologous group at 4 week and 16 week. Furthermore, heterologous immunization induced significant higher titer of SIV gp120 antibody at 4 week than homologous group.

Conclusions:

Specific immune response induced by rAd5F35-SIVenvT in combination with rMVA-SIVenvT was stronger than homologous vector immunization. The results provided references for further study in nonhuman primates.

Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Chinese Journal of Microbiology and Immunology Year: 2021 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Chinese Journal of Microbiology and Immunology Year: 2021 Type: Article