Table 3.
Cytokine Release From CTL Generated In Vivo by Immunization with Bone Marrow–derived DCs
Splenocytes from mice immunized with: | Stimulators | |||||
---|---|---|---|---|---|---|
mIFN-γ (pg/ml/24 h) | ||||||
CT26/P1A* | CT26/βgP‡ | CT26.CL25 | ||||
HBSS | 0 | 0 | 0 | |||
DC–β-gal transduced | 266 | 216,700 | 151,100 | |||
DC–Neu transduced | 164 | 210 | 372 | |||
Splen–βgP pulsed | 0 | 0 | 0 | |||
DC–βgP pulsed | 5 | 1197 | 1436 | |||
DC–P1A pulsed | 420 | 351 | 477 |
CT26 tumor cells pulsed with P1A peptide (10 μg/ml).
CT26 tumor cells pulsed with βgP (β-gal Ld peptide) (10 μg/ml). Splenocytes from animals immunized with transduced or peptide-pulsed DCs or peptide-pulsed splenocytes were pooled and restimulated in vitro with the Ld-restricted β-gal peptide (βgP) for 6 d in EHAA media with 30 IU/ml IL-2 (as described in Materials and Methods). On day 7, restimulated splenocytes (1 × 105) were plated in flat-bottomed 96-well tissue culture plates with 105 peptide-pulsed tumor targets. After 24 h, the supernatant was collected and analyzed for IFN-γ content.