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Tyrosol improves ovalbumin (OVA)-induced asthma in rat model through prevention of airway inflammation

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Abstract

Asthma is an inflammatory disease that affects many people around the world, especially persons at paediatric age group. The effectiveness of tyrosol, a natural phenolic compound, was examined in the asthma model induced by ovalbumin (OVA). For this purpose, four groups, each consisting of eight rats, were arranged. For 21 days, physiological saline solution was treated to the control group and OVA was treated to the groups of OVA, OVA + dexamethasone (Dexa) and OVA + tyrosol groups, intraperitoneally and through inhalation. Additionally, 0.25 mg/kg Dexa was treated to the OVA + Dexa group and 20 mg/kg tyrosol to the OVA + tyrosol group by oral gavage. Serum, blood, bronchoalveolar lavage fluid (BALF) and lung tissues of the rats were examined. It was observed that MDA level decreased, GSH level and GPx activity increased, and there was no change in CAT activity in lung tissues of the tyrosol treatment groups. It was also observed that NF-κB, TNF-α, IL-4, IL-5, IL-13, IFN-γ and IgE levels decreased compared to the OVA group in lung tissue and serum samples except for serum NF-κB and IL-4. However, no effect on IL-1 β level was observed. In addition, it was determined that tyrosol treatment increased the IL-10 level on both tissue samples. The results of the histopathological investigation of lung tissue showed that tyrosol significantly ameliorated OVA-induced histopathological lesions. Additionally, PAS staining showed that mucus hypersecretion was significantly reduced with the use of tyrosol. In addition, it was determined that the number of eosinophils decreased significantly in blood and BALF samples. The obtained results showed that tyrosol possessed antioxidant and anti-inflammatory features on OVA-induced rats and preserved tissue architecture.

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All data generated or analysed during this study are included in this published article (and its supplementary information files).

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Funding

This research was supported by the Unit of Scientific Research Projects of Mustafa Kemal University (Project number 19.M.041).

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MC conceived and designed the research. MK, CTİ, ME, ND, AU, İG, ET and MG conducted the experiments. MG analysed the data. MK, MC and CTİ wrote the manuscript. All authors read and approved the manuscript. All data were generated in-house, and no paper mill was used.

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Correspondence to Mustafa Cellat.

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All applications within the scope of the experiment were carried out within the framework of the permit of Hatay Mustafa Kemal University Animal Experiments Local Ethics Committee, numbered 2019/09–3. Consent to participate is not applicable.

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Not applicable.

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The authors declare no competing interests.

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The original version of this article was revised. Figures 3 and 4 are now corrected.

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Cellat, M., Kuzu, M., İşler, C.T. et al. Tyrosol improves ovalbumin (OVA)-induced asthma in rat model through prevention of airway inflammation. Naunyn-Schmiedeberg's Arch Pharmacol 394, 2061–2075 (2021). https://doi.org/10.1007/s00210-021-02117-y

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  • DOI: https://doi.org/10.1007/s00210-021-02117-y

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