
View larger version (24K):
[in this window]
[in a new window]
|
FIGURE 3. Protection of BALB/c mice from lethal MCMV infection by CD8 T cells expressing Ly49H-CD3 chimeric receptor and establishment of memory response. A, A total of 5 x 107 CD8 T cells either expressing Ly49HZ receptor ( ), Ly49Hcyto-del ( ), or none ( ) were injected into BALB/c mice (10 mice per group). Within 1 h of T cell transfer, the mice were infected with MCMV (4 x 106 pfu/mouse) and monitored for survival. B, Mice were infected with MCMV (4 x 106 pfu/mouse). Seventy-two hours after the infection, 5 x 107 CD8 T cells either expressing Ly49HZ receptor ( ) or no cells ( ) were injected into BALB/c mice (10 mice per group). C, Ten BALB/c mice that had been protected from initial MCMV infection by Ly49HZ-expressing CD8 T cells ( ) were rechallenged with MCMV 40 days after initial infection without further CD8 T cell transfusion. As a control, naive uninfected BALB/c mice ( ) (five mice per group) were infected with the same amount of virus. Representative data from two experiments are shown. D, Spleen cells from mice treated identically as in Fig. 3C ( ) were analyzed for the presence of GFP-positive CD8 T cells 10 days after rechallenge. Representative data from three mice are shown.
|