Stimulant | IL-4 SFUs/10e6 cells | p-value |
---|
| AroC+GFP Group | AroC+pGEM Group | |
---|
Media | 16 ± 10 | 12 ± 2 | 0.55 |
GFP CD8 peptide | 148 ± 56 | 12 ± 13 | 0.015 |
GFP protein | 18 ± 13 | 29 ± 26 | 0.56 |
Salmonella LPS | 55 ± 29 | 26 ± 9 | 0.17 |
Vaccine group
|
Media
|
GFP peptide
|
p-value
|
AroC+GFP | 16 ± 10 | 148 ± 56 | 0.016 |
AroC+pGEM | 12 ± 2 | 12 ± 13 | 0.97 |
- Groups of mice were vaccinated three times (Days 0, 28 and 56) with live recombinant Salmonella vaccine expressing GFP (AroC+GFP) or a negative Salmonella control vaccine not expressing any antigen (AroC+pGEM). On Day 84 (28 days after the last inoculation), splenocytes from the sacrificed mice were incubated with media only (negative assay control), or stimulated with GFP CD8+ T cell peptide (HYLSTQSAL), full-length GFP or Salmonella LPS in an IL-4 ELISPOT assay. The mean number of spots ± SD in triplicate wells was calculated and expressed as IL-4 SFUs/10e6 cells. Difference in response between or within vaccines was determined. Responses differ significantly if the p-values are less than 0.05 and do not differ significantly if the p-values are greater than 0.05.