TABLE 1

Compounds used in this study

Histamine receptor agonists and antagonists used, with receptor subtype selectivity.

CompoundReceptor SubtypeMode of Action
HistamineAllAgonist
2-PEDH1Agonist
TriprolidineH1Selective antagonist
MepyramineH1Selective antagonist
RanitidineH2Selective antagonist
ClobenpropitH3Selective antagonist
H4Reduced efficacy agonist
ThioperamideH3Antagonist
H4Inverse agonist
JNJ7777120H4Selective antagonist