Gülsüm Metkin

Scutellaria species are widely utilized and have demonstrated diverse biological effects for various diseases, both globally and in traditional Chinese medicine, due to the presence of bioactive compounds with unique structures. This study was conducted to reveal the in vitro effects and phytochemical properties of Scutellaria salviifolia Benth., an endemic species of Türkiye. The inhibitory effects of methanol extracts prepared separately from the aerial and root parts of S. salviifolia on the COX-2 and 5-LOX enzymes and their DPPH and ABTS radical scavenging activities were evaluated using in vitro methods. Additionally, the phenolic compounds of the extracts were compared based on Q-TOF LC/MS analysis. The extracts of S. salviifolia exhibited a high inhibitory effect on COX-2 enzyme activity, comparable to that of celecoxib. Still, they showed no significant effects in the 5-LOX enzyme inhibition assay. In the antioxidant activity assays, the percentage of inhibitory effects of both extracts against DPPH and ABTS were similar. A total of 29 and 27 compounds were detected in the aerial part and root extracts, respectively. Among the identified compounds, 18 were common to both the aerial part and root extracts. S. salviifolia may serve as a valuable alternative to the most well-known Scutellaria species, including S. baicalensis and S. barbata.