TABLE 1

Pharmacokinetics of 64Cu-DOTA-Alendronate in Normal Female Rats Over 48 Hours

Time (h)
%ID/g*%ID/organ*
Organ1.794.6214.415.126.229.341.748.61.794.6214.415.126.229.341.748.6
Blood0.150.240.170.150.220.250.170.171.973.332.261.962.803.532.442.50
Kidneys1.291.250.820.990.980.890.710.832.042.161.572.161.921.871.401.67
Liver0.270.260.360.350.530.520.490.521.712.342.793.084.274.614.574.86
Femur1.541.541.611.371.621.361.671.561.001.341.551.401.521.511.681.87
Knee joint1.691.872.352.272.061.812.252.121.221.561.731.631.912.052.132.42
Heart0.100.160.140.140.180.200.180.170.070.130.130.150.160.200.150.20
Lung0.120.190.140.140.190.200.170.180.100.300.150.140.190.220.160.16
Spleen0.060.130.120.120.170.190.150.150.020.060.060.060.070.090.060.07
Pancreas0.100.180.100.080.160.150.100.110.170.320.190.160.240.330.210.20
Stomach0.080.230.110.060.110.090.020.050.280.460.490.230.400.360.210.39
Small intestine0.170.380.260.250.330.290.260.231.202.442.082.282.062.671.701.93
Large intestine0.070.300.490.370.470.440.260.250.411.873.912.273.763.692.802.33
Muscle0.070.040.030.070.050.060.050.050.040.040.040.070.060.060.060.07
Mammary0.100.100.110.100.120.110.010.020.010.010.010.01
Vertebrae0.930.960.811.221.120.951.021.120.811.061.110.970.951.071.031.08
Bladder2.590.110.040.050.040.030.022.060.050.010.010.020.030.02
Red marrow0.050.070.050.050.070.080.050.050.130.220.150.130.190.230.160.17
  • * Values were obtained from individual tissue γ-counts.

  • Primary organs of concern were also measured by volume-of-interest tracing of PET images at 34 time points for each organ (Supplemental Table 1).

  • Includes contents.

  • Calculated assuming red marrow–to–blood activity concentration ratio of 0.31; red marrow total volume–to–blood total volume ratio of 0.21, rat blood volume of 64 mL/kg.