Detection of gonadotropin-releasing hormone receptor in normal human pituitary cells and pituitary adenomas using immunohistochemistry.

Détails

ID Serval
serval:BIB_7DE05FA558DC
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Detection of gonadotropin-releasing hormone receptor in normal human pituitary cells and pituitary adenomas using immunohistochemistry.
Périodique
Virchows Archiv : An International Journal of Pathology
Auteur(s)
La Rosa S., Celato N., Uccella S., Capella C.
ISSN
0945-6317 (Print)
ISSN-L
0945-6317
Statut éditorial
Publié
Date de publication
2000
Peer-reviewed
Oui
Volume
437
Numéro
3
Pages
264-269
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov'tPublication Status: ppublish
Résumé
Gonadotropin-releasing hormone (GnRH), which is a well-known regulator of gonadotroph function, has recently been considered to be a paracrine factor involved in the control of somatotroph, lactotroph, and corticotroph cells. GnRH action is initiated by binding to a specific cell surface receptor, the gonadotropin-releasing hormone receptor (GnRHR), which is expressed by follicle-stimulating hormone/luteinizing hormone (FSH/LH) cells. Using in situ hybridization techniques, GnRHR messenger ribonucleic acid (mRNA) has recently been detected in normal human anterior pituitary gland and in various pituitary adenomas, including FSH/LH-cell, growth hormone (GH)-cell, adrenocorticotropic hormone (ACTH)-cell, and null-cell adenomas. However, immunohistochemical studies indicating the specific cell distribution of GnRHR in normal pituitary cells have never been reported. The aim of the present investigation was to evaluate the immunohistochemical expression of GnRHR in different types of normal pituitary cells and related tumors. Using double-label immunohistochemical techniques on formalin-fixed and paraffin-embedded tissues and specific antibodies directed against pituitary hormones and GnRHR, we found GnRHR immunoreactivity not only in FSH/LH cells, but also in GH- and thyroid-stimulating hormone (TSH) cells. GnRHR was detected in FSH/LH-cell, GH-cell, mixed GH- and prolactin (PRL)-cell, and alpha-subunit (alpha-SU)/null-cell adenomas. The findings of this study suggest that the interaction between GnRH and GnRHR may play a role in paracrine/autocrine regulation of different types of normal pituitary cells and pituitary adenomas.
Mots-clé
Adenoma/chemistry, Follicle Stimulating Hormone/analysis, Humans, Immunohistochemistry, Luteinizing Hormone/analysis, Pituitary Gland/chemistry, Pituitary Gland/cytology, Pituitary Neoplasms/chemistry, Receptors, LHRH/analysis, Reverse Transcriptase Polymerase Chain Reaction, Thyrotropin/analysis
Pubmed
Web of science
Création de la notice
07/09/2016 8:31
Dernière modification de la notice
20/08/2019 14:39
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