title: Immunohistochemical localization of orexin A and orexin type 2 receptor-positive cells in the placenta of dogs.
abstract: The aim of the present study was to examine the presence and distribution of cells that express immunopositivity for orexin A (OXA) and its type 2 receptor (OX2R) in the dog placenta toward the end of pregnancy using immunohistochemical techniques. In the placental fetal portion, a few OXA and OX2R-positive cells were seen scattered in the outermost coating layer of chorionic villi and in the trophoblastic protrusions. Closer to the maternal portion, immunopositive labeling for both peptides was visible in the glandular epithelia and that for OXA also in the endothelium of the capillaries. These observations allow us to hypothesize that the canine placenta may be not only a source of orexin A, but also its target, and that orexin A may play an important role in controlling the function of this important organ for normal fetal development.
authors.affiliation: Department of Veterinary Medicine, Perugia, Italy. Electronic address: cecilia.dallaglio@unipg.it.
authors.forename: Cecilia
authors.initials: C
authors.lastname: Dall'Aglio
authors.affiliation: Department of Veterinary Medicine, Perugia, Italy.
authors.forename: Angela
authors.initials: A
authors.lastname: Polisca
authors.affiliation: Department of Veterinary Medicine, Perugia, Italy.
authors.forename: Alessandro
authors.initials: A
authors.lastname: Troisi
authors.affiliation: Department of Veterinary Medicine, Perugia, Italy.
authors.forename: Riccardo
authors.initials: R
authors.lastname: Zelli
authors.affiliation: Department of Veterinary Medicine, Perugia, Italy.
authors.forename: Piero
authors.initials: P
authors.lastname: Ceccarelli
mesh_terms: D000818:Animals; D004285:Dogs; D005260:Female; D007150:Immunohistochemistry; D047908:Intracellular Signaling Peptides and Proteins / Q000378:metabolism*; D009479:Neuropeptides / Q000378:metabolism*; D064446:Orexin Receptors / Q000378:metabolism*; D000068797:Orexins; D010920:Placenta / Q000166:cytology / Q000378:metabolism*; D011247:Pregnancy
chemical_list: D047908:Intracellular Signaling Peptides and Proteins; D009479:Neuropeptides; D064446:Orexin Receptors; D000068797:Orexins
keywords: Decidua; Dog; Immunohistochemistry; Orexin A; Orexin A type 2 receptor; Placenta