TABLE 2

Binding affinities of diltiazem and metabolites at the human ghrelin receptor

Functional assays were performed as described under Materials and Methods. Values represent the means ± S.E.M.

Ligand pKi
Ghrelin 10.4 ± 0.3
GHRP-6 8.6 ± 0.0
Hexarelin 8.5 ± 0.0
Diltiazem 5.5 ± 0.1
MA 5.2 ± 0.1
M1 6.1 ± 0.2
M2 6.3 ± 0.2
M4 5.2 ± 0.1
M6 4.9 ± 0.0