5178
H1-agonists ( histamine and 2-methylhistamine ) caused a transient rise of [ Ca2+ ], and H1-antagonists ( pyrilamine and doxepin ) inhibited the histamine -induced [ Ca2+ ]i rise more potently than the H2-antagonist ( cimetidine ) on the H3-antagonist ( impromidine ).
 None
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 None