Table 2.
Susceptibility of Tg mice expressing chimeric mouse/human PrP to sCJD(MM1) prionsa
| Line | Expression level | No. of days (95% CI) until spontaneous disease | n/n0 | Incubation period, days (95% CI) | n/n0 |
|---|---|---|---|---|---|
| Tg(MHu#2,M129,M108L)1208 | 0.3 | >600 | 0/7 | 193 (189,194) | 7/7 |
| Tg(MHu#2,M129,M108L)1284 | 0.3 | >600 | 0/5 | 187 (179, 201) | 8/8 |
| Tg(MHu#2,M129,M111V)1014b | 2.8 | >600 | 0/6 | 77 (74, 81) | 20/20 |
| Tg(MHu#2,M129,I137 M)10027 | 1.8 | >600 | 0/5 | 237 (224, 292) | 6/6 |
| Tg(MHu#2,M129,I137 M)10025 | 2.0 | >600 | 0/8 | 239 (214, 253) | 4/4 |
| Tg(MHu#2,M129,S142N)3018 | 1.1 | >600 | 0/7 | 118 (106, 123) | 22/22 |
| Tg(MHu#2,M129,S142N)3061 | 1.5 | >600 | 0/6 | 152 (134, 152) | 7/7 |
| Tg(MHu#2,M129,Y144W)16914 | <0.05 | 550 (508, 585) | 6/7 | 558 (419, >600)c | 4/4 |
| Tg(MHu#2,M129,Y144W)17421 | <0.05 | 555 (548, >600) | 3/6 | 553 (438, >600)c | 6/6 |
| Tg(MHu#2,M129,H154Y)4561 | 0.3 | >600 | 0/4 | 231 (200, 249) | 5/5 |
| Tg(MHu#2,M129,H154Y)5099 | 0.1 | >600 | 0/4 | 391 (201, 439) | 7/7 |
a
PrP expression level in brain relative to FVB mice, reported as mean fold expression from two to four brains. Spontaneous disease from time of birth and incubation periods from time of inoculation are reported as median time to onset of clinical signs in days, with 95% confidence intervals, calculated using Kaplan-Meier statistics. n, number of mice with clinical signs of disease; n0, number of mice monitored; ND, not determined.
b
Includes data previously reported in reference 13.
c
When recalculated from date of birth, durations not significantly different from spontaneous disease in uninoculated mice.