Neurohormonal stimulation of histamine release from neuroendocrine cells of the human adenomatous prostate

✍ Scribed by Polge, A.; Gaspard, C.; Mottet, N.; Guitton, C.; Boyer, J.C.; Choquet, A.; Combettes, S.; Bancel, E.; Costa, P.; Bali, J.P.

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 472 KB
• Volume: 34
• Category: Article
• ISSN: 0270-4137
• DOI: 10.1002/(sici)1097-0045(19980101)34:1<1::aid-pros1>3.0.co;2-p

✦ Synopsis

BACKGROUND.

Neuroendocrine cells (NE) constitute a population of highly specialized cells in prostatic glands; histamine has never been described in these cells. This article shows the presence and the regulation of release of histamine in NE. METHODS. In 21 prostatic adenomas, NE were identified by specific antisera against neuroendocrine markers (chromogranin-A, synaptophysin), histamine, and histidine decarboxylase (HDC); a rat HDC-cDNA probe was used to detect this enzyme by in situ hybridization. RESULTS. Immunoreactive cells for chromogranin-A, histamine, and HDC were found among luminal epithelial glandular cells. Similar cells were also labeled with the HDC-cDNA probe. Glandular cells, isolated from prostatic adenomas, were shown to contain histamine (7-40 pmol/mg cellular protein). L(-) norepinephrine causes a time-dependent (t 1 /2 = 22 min) histamine release; the ␣ 1 -receptor antagonists WB-4101 and YM-617 specifically inhibited this release, in agreement with a mediation by ␣ 1 -adenoreceptor subtype. CONCLUSIONS. There is some evidence for the presence in prostatic adenomas of histamine-forming cells of neuroendocrine type; histamine release from these cells is under the control of ␣ 1 -adrenoreceptor subtype.