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Published on: June 11, 2012
Gastric leptin: a new manager of gastrointestinal function
Sandra Guilmeau1, Marion Buyse, Andre Bado
1Institut National de la Santé et de la Recherche Médicale Unité 410, IFR02 Claude Bernard, Faculté de Médecine Xavier Bichat, 16 rue Henri Huchard, 75018 Paris, France.
Current Opinion in Pharmacology
|November 5, 2004
Summary
Leptin, a protein regulating appetite, is produced in the stomach and remains stable in gastric acid. This gut-derived leptin may influence nutrient absorption and gastrointestinal functions.
Area of Science:
- Endocrinology
- Gastroenterology
- Molecular Biology
Background:
- Leptin is a key regulator of energy homeostasis, traditionally associated with adipose tissue.
- The leptin gene (ob gene) and its receptor are expressed in various tissues beyond adipocytes, including the stomach.
Purpose of the Study:
- To investigate the presence and potential role of stomach-derived leptin in the gastrointestinal tract.
- To explore the stability and function of leptin within the gastric and intestinal environment.
Main Methods:
- Analysis of leptin expression in the stomach.
- Assessment of leptin stability under acidic conditions (pH 2).
- Identification of leptin receptors in the intestine.
Main Results:
- Stomach-derived leptin is secreted into the gastric lumen and is stable in gastric juice.
- Leptin receptors are present on the intestinal brush border.
- Emerging evidence suggests local actions of gut leptin on intestinal functions like nutrient absorption.
Conclusions:
- Leptin has a broader distribution and function than previously understood, extending to the gastrointestinal tract.
- Stomach-derived leptin may play a significant role in regulating gut physiology and nutrient absorption.
- Further research into gut leptin's physiopathological implications is warranted.
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