title: H4 histamine receptors mediate cell cycle arrest in growth factor-induced murine and human hematopoietic progenitor cells.
abstract: The most recently characterized H4 histamine receptor (H4R) is expressed preferentially in the bone marrow, raising the question of its role during hematopoiesis. Here we show that both murine and human progenitor cell populations express this receptor subtype on transcriptional and protein levels and respond to its agonists by reduced growth factor-induced cell cycle progression that leads to decreased myeloid, erythroid and lymphoid colony formation. H4R activation prevents the induction of cell cycle genes through a cAMP/PKA-dependent pathway that is not associated with apoptosis. It is mediated specifically through H4R signaling since gene silencing or treatment with selective antagonists restores normal cell cycle progression. The arrest of growth factor-induced G1/S transition protects murine and human progenitor cells from the toxicity of the cell cycle-dependent anticancer drug Ara-C in vitro and reduces aplasia in a murine model of chemotherapy. This first evidence for functional H4R expression in hematopoietic progenitors opens new therapeutic perspectives for alleviating hematotoxic side effects of antineoplastic drugs.
authors: Université Paris Descartes, Faculté de Médecine, CNRS UMR8147, Hôpital Necker, Paris, France.
authors: Anne-France
authors: AF
authors: Petit-Bertron
authors: François
authors: F
authors: Machavoine
authors: Marie Paule
authors: MP
authors: Defresne
authors: Michel
authors: M
authors: Gillard
authors: Pierre
authors: P
authors: Chatelain
authors: Prakash
authors: P
authors: Mistry
authors: Elke
authors: E
authors: Schneider
authors: Michel
authors: M
authors: Dy
mesh_terms: D000818:Animals; D002453:Cell Cycle / Q000502:physiology*; D049109:Cell Proliferation; D000242:Cyclic AMP / Q000378:metabolism; D017868:Cyclic AMP-Dependent Protein Kinases / Q000378:metabolism; D020868:Gene Silencing; D006412:Hematopoietic Stem Cells / Q000166:cytology / Q000187:drug effects*; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins / Q000494:pharmacology*; D051379:Mice; D043562:Receptors, G-Protein-Coupled / Q000502:physiology*; D011968:Receptors, Histamine / Q000502:physiology*; D000074040:Receptors, Histamine H4; D015398:Signal Transduction
chemical_list: C418607:HRH4 protein, human; C498829:Hrh4 protein, mouse; D036341:Intercellular Signaling Peptides and Proteins; D043562:Receptors, G-Protein-Coupled; D011968:Receptors, Histamine; D000074040:Receptors, Histamine H4; D000242:Cyclic AMP; D017868:Cyclic AMP-Dependent Protein Kinases