Chemical Composition of Different Parts of the Vitex agnus-castus L. Essential Oils and Their In-Vitro Cytotoxic Activities

: The essential oil (EO) compositions and chemotypes of the important ethnomedicinal plant Vitex agnus-castus L. flowers, leaves, and fruits collected from Türkiye (Balıkesir and İstanbul) were identified in the present study. Different parts of the V. agnus-castus EO’s in-vitro cytotoxic effects on the MCF-7 (human breast adenocarcinoma) and A549 (human lung carcinoma) human-origin cell lines were anaylzed in the current study. The composition of hydrodistiled EOs extracted from flowers, leaves, and fruits of V. agnus-castus were analyzed by GC–FID/MS. Monoterpene hydrocarbons and oxygenated monoterpene compounds were detected as the predominant component class of the V. agnus-castus . EOs extracted from Balıkesir region were defined as the “ α - pinene-1,8-cineole” chemotype, while EOs extracted from İstanbul region were defined as the “sabinene-1,8-cineole” chemotype. Sesquiterpene hydrocarbons constituted more than 20% of the compounds in the EOs extracted from the flowers. To the best of our knowledge, this study is the first to analyze the in-vitro cytotoxic effects of flowers. This study is also the first to show the in-vitro cytotoxic effects of fruit, the most commonly used part of the plant, EO on the MCF-7 cell line. Balıkesir region’s EOs were observed as more potent -especially the purple flower’s IC 50 is about 4.68 µg/mL on the MCF7 cell line-than İstanbul regions, which might be attributed to the higher amount of α -pinene, caryophyllene, and limonene content. Our results indicated that the V. agnus-castus EOs, which contain α -pinene, 1,8-cineole, caryophyllene, and limonene as major components, showed relatively high cytotoxic effects compared to the control groups on the MCF7 and A549 cell lines.