Abstract

Vaccariae Semen, derived from the dried ripe seed of Vaccaria segetalis (Neck.) Garcke, has various therapeutic characteristics in traditional Chinese medicine (TCM), containing promoting blood circulation and unblocking meridians. It exhibits significant anti-cancer activity and is therapeutically utilized to treat and reduce chemotherapy adverse effects in cancer patients, notably those with lung cancer. However, the active ingredients responsible for its anti-lung cancer efficacy remain unknown. In this study, we used A549 cell fishing in conjunction with UHPLC-LTQ Orbitrap MS to screen for anti-lung cancer active components in Vaccariae Semen. The cell counting Kit-8 (CCK-8) assay revealed that the n-butanol extract substantially reduced A549 cell growth. Through the cell fishing assay, we found 14 A549 cell-binding compounds in the n-butanol extract, all of which were identified as triterpenoid saponins. The total saponins of Vaccariae Semen were subsequently purified using macroporous adsorption resin (MAR), and they showed a significant inhibitory effect on the proliferation of A549 lung cancer cells, as well as alterations in cell morphology, apoptosis, and fragmentation. In conclusion, saponins were discovered as the key active components responsible for the anti-lung cancer activity of Vaccariae Semen.

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