TABLE 2

Bmax and pKI or pIC50 values determined from 125I-BE 2254 saturation and competition radioligand binding assays in HEK293 cells expressing α1D-ARs

Subtypes Expressed Bmax BMY 7378 %high F18A %high
pKI high pKlow pIC50 high pIC50 low
fmol/mg
α1D + pREP4 1204 ± 46 -8.7 ± 0.1 100 -7.4 ± 0.03 100
α1D + HAα1B 1070 ± 117 -6.1 ± 0.01 0 -9.0 ± 0.04 -7.0 ± 0.07 66
α1D + HAα1A 1845 ± 19 -9.3 ± 0.2 -5.9 ± 0.04 14 -7.6 ± 0.26 -5.9 ± 0.09 27