Abstract
Background & aims: Allicin, the active substance of fresh crushed garlic has different biological activities and was implicated as an anti-inflammatory agent. Epithelial cells have an important role in intestinal inflammation. The aim of this study was to assess the immunomodulatory effect of allicin on intestinal epithelial cells. Methods: The spontaneous and TNF-α-stimulated secretion of IL-1β, IL-8, IP-10 and MIG from HT-29 and Caco-2 cells was tested with, or without pretreatment with allicin. Cytokine secretion was assessed using ELISA and expression of mRNA was determined by an RNA protection assay. Results: Allicin markedly inhibited the spontaneous and TNF-α-induced secretion of IL-1β, IL-8, IP-10 and MIG from the two different cell lines in a dose-dependent manner and suppressed the expression of IL-8 and IL-1β mRNA levels. In addition, allicin suppressed the degradation of I κ B. No effect on cell viability was noted. Conclusions: These observations indicate that allicin exerts an inhibitory immunomodulatory effect on intestinal epithelial cells and suggest that allicin may have the potential to attenuate intestinal inflammation.
Original language | English |
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Pages (from-to) | 1199-1208 |
Number of pages | 10 |
Journal | Clinical Nutrition |
Volume | 23 |
Issue number | 5 |
DOIs | |
Publication status | Published - Oct 2004 |
Keywords
- Allicin
- Chemokines
- Cytokines
- Epithelial cells
- Intestine
- TNF-α