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Table 2 The effect of LT-βR-Fc fusion protein administration on adoptive immunotherapy.

From: Tumor-specific T cells signal tumor destruction via the lymphotoxin β receptor

Adoptive immunotherapy a Mean number of pulmonary metastases b
Donor Hosts Number of T cells transferred Blocking proteinsb Exp.1 Exp.2 Exp.3 Exp.4
None wt 0 none 250 250   
wt wt 35 hu IgG 21(5)d 52(13)d   
wt wt 35 LTβR-Fc 33(6)d 78(11)d   
wt GKO 0 None 243(60) 244(60) 250 250
GKO GKO 35 hu IgG 6(3)d 88(23)d 85(12)d 90(30)d
GKO GKO 35 LTβR-Fc 9(3)d 211(56)e 250e 250e
  1. a) Mice were vaccinated s.c. with D5-G6 tumor cells and TVDLN were harvested 8 days later. Lymph node cells were stimulated in vitro with anti-CD3 for two days and then expanded for three days in 60 IU/ml IL-2. Effector cells were harvested and 35 × 106 T cells were adoptively transferred into animals with established 3-day D5 pulmonary metastases. IL-2 (90,000 IU) was administered daily i.p. for four consecutive days following adoptive transfer.
  2. b) Purified control human IgG or LT-βR-Fc (250 μg) was directly administered i.v. after adoptive transfer of the TE and for the following 3 days once per day.
  3. c) Mice were sacrificed 13 days following i.v. inoculation of tumor and the number of pulmonary metastases enumerated in a blinded fashion. Results presented are the mean of 5 mice. Metastases that were too numerous to count accurately were known to be greater than 250 metastases and were assigned a value of 250.
  4. d) p < 0.05 compared to IL-2 alone treated controls.
  5. e) p > 0.05 compared to IL-2 alone treated controls.