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Effects of Ellagic Acid on Vaginal Innate Immune Mediators and HPV16 Infection In Vitro
Aornrutai Promsong1, Jureeporn Chuerduangphui2, Claire N Levy3
1Faculty of Medicine, Princess of Naradhiwas University, Narathiwat 96000, Thailand.
Molecules (Basel, Switzerland)
|August 10, 2024
Summary
Ellagic acid (EA) enhances vaginal innate immunity by increasing human beta-defensin 2 (hBD2) and secretory leukocyte protease inhibitor (SLPI) expression in vaginal cells. This plant-derived compound shows potential for improving vaginal health without cytotoxicity.
Area of Science:
- Immunology
- Vaginal Health
- Natural Products
Background:
- Vaginal epithelial cells are crucial for innate immunity, producing antimicrobial peptides like human beta-defensin 2 (hBD2) and secretory leukocyte protease inhibitor (SLPI).
- Phytochemicals, such as ellagic acid (EA), are being explored for their potential health benefits, including immunomodulatory effects.
Purpose of the Study:
- To investigate the in vitro effects of ellagic acid (EA) on human vaginal epithelial cells' innate immune responses.
- To evaluate EA's impact on the expression of hBD2 and SLPI at both transcriptional and translational levels.
- To assess EA's potential to inhibit HPV16 pseudovirus infection and its cytotoxicity.
Main Methods:
- Human vaginal epithelial cells were cultured with or without EA.
- Expression of hBD2 and SLPI mRNA and protein was quantified.
- Cytokine/chemokine secretion and EA cytotoxicity were measured using established assays.
Main Results:
- EA significantly increased hBD2 mRNA and protein levels in a dose-dependent manner.
- EA significantly upregulated SLPI mRNA, but not SLPI protein.
- EA induced IL-2 secretion and demonstrated no significant cytotoxicity.
- EA showed a non-significant trend towards inhibiting HPV16 pseudovirus infection.
Conclusions:
- Vaginal epithelial cells respond to EA by upregulating key innate immune factors, particularly hBD2.
- EA is non-cytotoxic at tested concentrations and may serve as an immunomodulatory agent.
- Plant-derived EA holds promise for enhancing vaginal health and innate defense mechanisms.
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