PT  - JOURNAL ARTICLE
AU  - H Mix
AU  - A Widjaja
AU  - O Jandl
AU  - M Cornberg
AU  - A Kaul
AU  - M Göke
AU  - W Beil
AU  - M Kuske
AU  - G Brabant
AU  - M P Manns
AU  - S Wagner
TI  - Expression of leptin and leptin receptor isoforms in the human stomach
AID  - 10.1136/gut.47.4.481
DP  - 2000 Oct 01
TA  - Gut
PG  - 481--486
VI  - 47
IP  - 4
4099  - http://gut.bmj.com/content/47/4/481.short
4100  - http://gut.bmj.com/content/47/4/481.full
SO  - Gut2000 Oct 01; 47
AB  - BACKGROUND Leptin is an important regulator of food intake and energy expenditure. Initially it was thought to be expressed exclusively in and secreted by adipocytes. Recently, leptin expression was also noted in other tissues, including rat gastric mucosa. Information on leptin and leptin receptor expression in the human stomach is lacking.AIM To investigate expression of leptin and its corresponding receptors in human gastric epithelial cells.METHODS Fundic and antral gastric mucosal biopsies, primary cultures of human gastric epithelial cells, and the human gastric cancer cell line AGS were screened for expression of leptin and different leptin receptor isoform mRNA by reverse transcriptase-polymerase chain reaction. Immunohistochemistry was performed for localisation of leptin and leptin receptor proteins in gastric mucosa.RESULTS mRNA of leptin and its four receptor isoforms (huOB-R, long receptor isoform; huB219.1–3, short receptor isoforms) was detected in gastric mucosal biopsies, cultured human gastric epithelial cells, and gastric cancer cells. Immunohistochemistry demonstrated that chief as well as parietal cells were reactive to leptin and leptin receptors.CONCLUSIONS Leptin and leptin receptors are expressed in human gastric mucosa. These findings suggest a paracrine and/or autocrine effect of leptin on gastric epithelial cell function.FITCfluorescein isothiocyanatehuOB-Rhuman long leptin receptor isoformhuB219.1-huB219.3human short leptin receptor isoformsRT-PCRreverse transcriptase-polymerase chain reactionBSAbovine serum albumin