Table 4.
Inhibition of bursting by subtype-selective ligands
Ligand | Receptor(s) activated | % inhibition of burst rate | Number of slices |
---|---|---|---|
SST | All | 58.6 ± 4% | 11 |
Octreotide | SST2 > SST3 | 33.9 ± 4%* | 9 |
l-796,778 | SST3 | 5.2 ± 3.4* , ** | 5 |
J-2156 | SST4 | 21.8 ± 3%* | 10 |
l-803,087 | SST4 | 2.1 ± 5.7%* , ** | 8 |
Octreotide + J-2156 | SST2 + SST4 | 47.0 ± 5 | 6 |
SST + SRA880 a | All but SST1 | 47.0 ± 2 | 7 |
SST + ACQ090 b | All but SST3 | 46 ± 5 | 6 |
Concentration is 1 μm for all drugs except when octreotide and J-2156 are coapplied (0.5 μm each).
aSST1-selective antagonist.
bSST3-selective antagonist.
*Significantly different from SST alone (p < 0.05; unpaired t test);
**no significant inhibition of burst rate (p > 0.05; paired t test).