New issues about melatonin and its effects on the digestive system.

Area of Science:

• Endocrinology
• Gastroenterology
• Molecular Biology

Background:

• Melatonin is a hormone primarily secreted by the pineal gland in a circadian rhythm, influenced by light.
• It is also synthesized in other tissues, including enterochrommaffin cells in the gastrointestinal tract.
• Melatonin exhibits potent antioxidant properties and interacts with both membrane and nuclear receptors.

Purpose of the Study:

• To explore the multifaceted roles of melatonin in human physiology, with a specific focus on its functions within the gastrointestinal system.
• To investigate the potential of melatonin as a therapeutic agent for gastrointestinal disorders, particularly NSAID-induced gastropathy.

Main Methods:

• Review of existing literature on melatonin synthesis, secretion, and mechanisms of action.
• Analysis of studies investigating melatonin's presence and receptor distribution in the gastrointestinal tract.
• Examination of research on melatonin's effects on gastric mucosal protection and NSAID-induced damage.

Main Results:

• Melatonin is synthesized in the gut and its release can follow a circadian pattern, potentially influenced by diet.
• Melatonin receptors are present in the digestive system, indicating a significant role in gastrointestinal physiology.
• Melatonin demonstrates gastroprotective effects by stimulating protective hormones, enhancing blood flow, and mitigating ischemia-reperfusion injury.
• Studies indicate melatonin treatment can reduce NSAID-induced gastric mucosal lesions.

Conclusions:

• Melatonin possesses significant antioxidant and anti-inflammatory properties relevant to gastrointestinal health.
• The hormone's interaction with its receptors in the gut suggests a crucial role in digestive physiopathology.
• Melatonin shows promise as a therapeutic agent for preventing and treating gastrointestinal conditions, including NSAID-induced gastropathy.