Journal
NUTRIENTS
Volume 14, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/nu14030503
Keywords
anti-inflammatory; carvacrol; streptococcal pharyngitis; cytokines; LTA; PGN; inflammation; Streptococcus pyogenes
Categories
Funding
- Collaborative Research and Development Grant program [CRDPJ 448052]
- Natural Sciences and Engineering Research Council (NSERC) of Canada
- Killam Chair Funds
- Island Abbey Foods ltd, Charlottetown, PE, Canada
- Department of Plant, Food, and Environmental Sciences, Dalhousie University
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The study found that carvacrol has anti-inflammatory properties and may be used to manage the pain associated with streptococcal pharyngitis.
Pharyngitis is an inflammation of the pharynx caused by viral, bacterial, or non-infectious factors. In the present study, the anti-inflammatory efficacy of carvacrol was assessed using an in vitro model of streptococcal pharyngitis using human tonsil epithelial cells (HTonEpiCs) induced with Streptococcus pyogenes cell wall antigens. HTonEpiCs were stimulated by a mixture of lipoteichoic acid (LTA) and peptidoglycan (PGN) for 4 h followed by exposure to carvacrol for 20 h. Following exposure, interleukin (IL)-6, IL-8, human beta defensin-2 (HBD-2), epithelial-derived neutrophil-activating protein-78 (ENA-78), granulocyte chemotactic protein-2 (GCP-2), cyclooxygenase-2 (COX-2), tumor necrosis factor-alpha (TNF-alpha), and prostaglandin (PGE(2)) were measured by enzyme-linked immunosorbent assays (ELISA). The levels of pro-inflammatory cytokines, IL-6, IL-8, ENA-78, and GCP-2 were decreased in a carvacrol dose-dependent manner. The production of HBD-2 was significantly suppressed over 24 h carvacrol treatments. PGE(2) and COX-2 levels in the cell suspensions were affected by carvacrol treatment. TNF-alpha was not detected. The cell viability of all the tested carvacrol concentrations was greater than 80%, with no morphological changes. The results suggest that carvacrol has anti-inflammatory properties, and carvacrol needs to be further assessed for potential clinical or healthcare applications to manage the pain associated with streptococcal pharyngitis.
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