jnj-7777120 and alpha-methylhistamine

The early research described that adrenocorticotropic hormone (ACTH) release from mouse pituitary tumor AtT-20 cells was regulated by histamine H(3) receptors. Here, we provide the evidence that histamine H(4) receptor was expressed in AtT-20 cell, and that the accelerated ACTH secretions from the cells by histamine and R-alpha-methylhistamine were blocked by JNJ7777120, a specific H(4) receptor antagonist, in concentration dependent manner, but not by the H(1) and H(2) receptor antagonists. The results indicate, for the first time, that histamine H(4) receptor, rather than histamine H(3) receptor, played a role in regulation of ACTH release from mouse pituitary AtT-20 cells.

Topics: Adrenocorticotropic Hormone; Animals; Cell Line; Histamine Antagonists; Indoles; Methylhistamines; Mice; Piperazines; Receptors, G-Protein-Coupled; Receptors, Histamine; Receptors, Histamine H3; Receptors, Histamine H4; Reverse Transcriptase Polymerase Chain Reaction