Somatostatin receptor subtypes in human non-functioning neuroendocrine tumors and effects of somatostatin analogue SOM230 on cell proliferation in cell line NCI-H727

Katsuhiko Ono, Takashi Suzuki, Yasuhiro Miki, Yusuke Taniyama, Yasuhiro Nakamura, Yutaka Noda, Mika Watanabe, Hironobu Sasano

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Well-differentiated neuroendocrine tumors (NT) expresses somatostatin receptors (sstr). A composition of sstr subtype determines biological behavior. We therefore evaluated their immunolocalization in 71 NT cases using immunohistochemistry. Sstr immunoreactivity was demonstrated as follows: sstr1 39.4% of all cases, sstr2A 90.1%, sstr2B 39.4%, sstr3 50.7% and sstr5 76.1%. Based on these findings, the effects of the recently developed sstr subtype-specific somatostatin analogue SOM230 on the NT cell line NCI-H727 were examined. SOM230 significantly reduced cell proliferation while the conventional analogue SMS201-995 did not. Therefore, SOM230 has advantages in controlling the cell proliferation of these tumors but the status of sstr subtypes should be determined, possibly using immunohistochemistry, in order to confer its maximum benefits.

Original languageEnglish
Pages (from-to)2231-2239
Number of pages9
JournalAnticancer research
Volume27
Issue number4 B
Publication statusPublished - 2007 Jul 1

Keywords

  • Immunohistochemistry
  • NCI-H727
  • Somatostatin
  • Somatostatin analogue
  • Somatostatin receptor

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

Fingerprint Dive into the research topics of 'Somatostatin receptor subtypes in human non-functioning neuroendocrine tumors and effects of somatostatin analogue SOM230 on cell proliferation in cell line NCI-H727'. Together they form a unique fingerprint.

  • Cite this