Table 2.
Measured two-component FLT (τ, ns) of dyes from albumin solutions compared with FLTs in the liver region in mice after intravenous administration. Good agreement was observed between the two FLT components in vitro and in vivo. The in vitro and in vivo fractional composition of FLTs in the liver were significantly different for LS-276 and DTTCI, indicating the differences in protein-binding characteristics of the molecular probes. Standard deviations for in vitro measurements were less than 5%.
in vitro | in vivo | |||
---|---|---|---|---|
Compound | τ1 (F1)a | τ2 (F2) | τ1 (F1) | τ2 (F2) |
LS-276 | 0.69 (55) | 1.19 (42) | 0.77±0.06 (14) | 1.16±0.02 (86) |
DTTCI | NSb | 1.14 (95) | 0.34±0.03 (30) | 1.12±0.02 (70) |
IR-806 | 0.52 (60) | 1.19 (38) | 0.45±0.02 (62) | 1.04±0.04 (38) |
LS-277 | 0.64 (65) | 1.15 (32) | 0.48±0.03 (63) | 0.98±0.02 (37) |
Cypate | 0.47 (69) | 0.97 (30) | 0.41±0.01 (75) | 0.96±0.01 (25) |
ICG | 0.63 (61) | 1.10 (37) | 0.53±0.02 (67) | 0.90±0.02 (33) |
IR-820 | 0.41 (77) | 0.91 (19) | 0.41±0.02 (85) | 0.92±0.02 (15) |
Fractional component (%);
NS, not significant