Histamine Agonists Humans 8 controlled study 8 human 8 human cell 8 priority journal 8 signal transduction 8 Receptors, Histamine H2 6 U937 Cells 6 animal cell 6 article 6 histamine H2 receptor 6 histamine H2 receptor agonist 6 nonhuman 6 Animals 4 Cyclic AMP 4 Dose-Response Relationship, Drug 4 G protein coupled receptor kinase 2 4 Signal Transduction 4 cell differentiation 4 cell proliferation 4 cyclic AMP 4 AR protein, human 2 Age Factors 2 Angiogenesis 2 Angiogenesis Inhibitors 2 Antineoplastic Agents 2 Aromatase 2 Article 2 COS Cells 2