Cloning and characterization of gastrin receptor from ECL carcinoid tumor of Mastomys natalensis

Hirohisa Nakata, Toshimitsu Matsui, Mitsuhiro Ito, Taizo Taniguchi, Yoko Naribayashi, Noriyuki Arima, Akira Nakamura, Yoshikazu Kinoshita, Kazuo Chihara, Shuyn Hosoda, Tsutomu Chiba

Research output: Contribution to journalArticlepeer-review

122 Scopus citations


We report here the cDNA cloning of a putative gastrin receptor from enterochromaffin-like (ECL) carcinoid tumor of Mastomys natalensis. For this study, we used the polymerase chain reaction technique to amplify transmembrane domain sequences related to rat pancreatic cholecystokinin (CCK)-A receptor from the ECL tumor cDNA library. The amino acid sequence deduced from the cloned cDNA showed 85.7% and 49.0% identity to canine parietal cell gastrin receptor and rat pancreatic CCK-A receptor, respectively. Ligand binding studies using COS-7 cells transfected with the cDNA showed the same binding specificity for gastrin and CCK-8 as the gastrin receptor on the Mastomys carcinoid tumor membrane. Both gastrin and CCK-8 elevated free cytosolic calcium concentration in COS-7 cells expressing the cloned receptor. RNA blot analysis revealed the expression of the gastrin receptor in both Mastomys stomach and brain.

Original languageEnglish
Pages (from-to)1151-1157
Number of pages7
JournalBiochemical and Biophysical Research Communications
Issue number2
StatePublished - 16 Sep 1992
Externally publishedYes


Dive into the research topics of 'Cloning and characterization of gastrin receptor from ECL carcinoid tumor of Mastomys natalensis'. Together they form a unique fingerprint.

Cite this