Changes in splenocyte proliferation, subsets and cytokine production in mice immunized with recombinant vaccine Bifidobacterium bifidum (pGEX-Sj32) of Schistosoma japonicum
10.3969/j.issn.1673-4254.2015.02.09
- VernacularTitle:日本血吸虫重组Bb（pGEX-Sj32）疫苗诱导BALB/c鼠脾细胞增殖、亚群及细胞因子的动态变化
- Author:
Jianrong TAN
1
;
Wengui LI
;
Ting QIN
Author Information
1. 重庆医科大学附属第一医院传染病寄生虫病研究所
- Keywords:
Schistosoma japonicum;
rBb(pGEX-Sj32) vaccine;
splenocyte;
proliferation;
T cell subsets;
cytokines
- From:
Journal of Southern Medical University
2015;(2):202-207
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe the dynamic changes of immune responses of splenocytes in mice immunized with recombinant vaccine Bifidobacterium bifidum (pGEX- Sj32) of Schistosoma japonicum and investigate the immunological mechanism of the vaccine. Methods Eighty-eight BALB/c mice were randomized for immunization with 106 CFU recombinant vaccine orally or with 105 CFU recombinant vaccine intranasally. Four mice were selected from each group every two weeks to test the responses of the splenocytes to stimulations with SjAWA or ConA. MTT assay and flow cytometry were used to assess splenocyte proliferation and the distribution of CD4+and CD8+T cells, respectively;the levels of interleukin-10 (IL-10), IL-12 and tumor necrosis factor-α (TNF-α) in the cell culture supernatant were detected by ELISA. Results Regardless of the stimulations, the splencytes showed significantly enhanced proliferation in weeks 2-16 in oral administration group and in weeks 2-18 in intranasal group (P<0.01). CD4+subsets in both two groups increased obviously in weeks 2-12 (P<0.01) but CD8+subsets remained stable. In oral administration group, the levels of TNF-α, IL-10 and IL-12 increased in weeks 2-14, 2-18 and 2-14, and peaked at week 8, 10 and 6, respectively;in intranasal group, the cytokines increased in weeks 2-14, 2-18 and 2-18, and peaked at week 8, 10 and 8, respectively. Conclusion The recombinant vaccine rBb (pGEX-Sj32) can induce effective immune responses in mice.
