Human Nasal Epithelial Cells Exposed to Eucalyptus globulus Leaf Oil Reveal Novel Information About the Interactions Between Cells and Volatile Plant Oils

The current results indicate that the leaf oil of the Eucalyptus globulus tree inhibits the metabolic activity of primary human nasal epithelial cells in a dose-dependent manner, although it does not cause an immediate cytotoxic reaction. This progressive modulation trend suggests a physiologically active interaction with nasal epithelial cells rather than generic cellular harm. From an otorhinolaryngological perspective, these findings lend credence to the idea that, under controlled conditions, topical formulations, inhalational therapies, and nasal sprays containing Eucalyptus globulus leaf oil could be beneficial adjuncts. To determine the optimal dosing regimen, ensure it won't harm the mucosa, and use these findings from the laboratory to inform clinical practice in ENT, more in vivo and clinical trials are needed.