Melatonin reduces bacterial translocation and apoptosis in trinitrobenzene sulphonic acid-induced colitis of rats.
Department of General Surgery, Erciyes University School of Medicine, Kayseri 38039, Turkey. acakcan2002@yahoo.com
AIM: To investigate the effects of exogenous melatonin on bacterial translocation and apoptosis in a rat ulcerative colitis model. METHODS: Rats were randomly assigned to three groups: group I: control, group II: experimental colitis, group III: colitis plus melatonin treatment. On d 11 after colitis, plasma tumor necrosis factor-alpha, portal blood endotoxin levels, colon tissue myeloperoxidase and caspase-3 activity were measured. Bacterial translocation was quantified by blood, lymph node, liver and spleen culture. RESULTS: We observed a significantly reduced incidence of bacterial translocation to the liver, spleen, mesenteric lymph nodes, portal and systemic blood in animals treated with melatonin. Treatment with melatonin significantly decreased the caspase-3 activity in colonic tissues compared to that in trinitrobenzene sulphonic acid- treated rats (16.11 +/- 2.46 vs 32.97 +/- 3.91, P < 0.01). CONCLUSION: Melatonin has a protective effect on bacterial translocation and apoptosis.
PMID: 18240350 [PubMed - indexed for MEDLINE]
PMCID: PMC2687060