Presence of kisspeptin-like immunoreactivity in human adrenal glands and adrenal tumors

Kazuhiro Takahashi, Itaru Shoji, Akiko Shibasaki, Ichiro Kato, Keisuke Hiraishi, Hajime Yamamoto, Kiriko Kaneko, Osamu Murakami, Ryo Morimoto, Fumitoshi Satoh, Sadayoshi Ito, Kazuhito Totsune

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Kisspeptins are neuropeptides which activate the hypothalamo-pituitary gonadal axis and are considered to play important physiological roles in the reproduction. Kisspeptins have also been reported to stimulate the aldosterone secretion from the adrenal cortex. However, the expression of kisspeptins in human adrenal glands and adrenal tumors has not been clarified yet. We, therefore, studied the presence of kisspeptin-like immunoreactivity (LI) in human adrenal glands and adrenal tumors (adrenocortical adenomas, adrenocortical carcinomas, and pheochromocytomas) by radioimmunoassay and immunocytochemistry. Kisspeptin-LI was detected in all the tissues examined; normal portions of adrenal glands (3.0±2.3 pmol/g wet weight, n=21, mean ± SD), aldosterone-producing adenomas (4.6±3.3 pmol/g wet weight, n=10), cortisol-producing adenomas (2.7±1.4 pmol/g wet weight, n=14), adrenocortical carcinomas (1.7±0.2 pmol/g wet weight, n=4), and pheochromocytomas (1.8±0.8 pmol/g wet weight, n=6). There was no significant difference in kisspeptin-LI levels among them. Immunocytochemistry showed positive kisspeptin-immunostaining in normal adrenal glands, with stronger immunostaining found in the medulla. Furthermore, positive kisspeptin-immunostaining was found in all types of adrenal tumors examined; adrenocortical adenomas, adrenocortical carcinomas, and pheochromocytomas. The intensity of kisspeptin-immunostaining in these adrenal tumors was, however, not so strong as that in normal adrenal medulla. The present study has shown for the first time the presence of kisspeptin-LI in adrenal glands and adrenal tumors.

Original languageEnglish
Pages (from-to)138-144
Number of pages7
JournalJournal of Molecular Neuroscience
Volume41
Issue number1
DOIs
Publication statusPublished - 2010 May

Keywords

  • Adenoma
  • Adrenal
  • Carcinoma
  • Kisspeptin
  • Metastin
  • Pheochromocytoma
  • Tumor

ASJC Scopus subject areas

  • Cellular and Molecular Neuroscience

Fingerprint Dive into the research topics of 'Presence of kisspeptin-like immunoreactivity in human adrenal glands and adrenal tumors'. Together they form a unique fingerprint.

Cite this