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As a key component of the cell-to-cell communication, small extracellular vesicles (SEVs) released from various sources are known to be affecting the physiological conditions of the target cells. Although it has been suggested that edible plant-derived nanoparticles contributes to the cross kingdom communication with the mammalian cells, the effect of these particles on cancer cell progression still needs a further exploration. Here, we isolated and then characterized garlic derived SEVs by nanoparticle tracking analysis, electron microscopy and SEV surface antibodies. In order to investigate anti-cancer property of garlic SEVs A498 human kidney carcinoma, A549 human lung carcinoma were used as cell models along with the normal human dermal fibroblast cell lines. Annexin V/pI staining and analysis of apoptotic mRNA and protein expression levels suggested that garlic SEVs induced apoptosis through activation of intrinsic pathway. Furthermore, angiogenic VEGF protein expression levels significantly decreased in response to SEVs treatment in cancer cells. Our results support that garlic derived SEVs could cause apoptotic cell death among cancer cells while normal cells remain unaffected with the treatment. This study revealed for the first time that plant SEVs possess anti-cancer affects by inducing caspase mediated apoptosis and provided a new alternative for cancer treatment.

Garlic (Allium sativum)-derived SEVs inhibit cancer cell proliferation and induce caspase mediated apoptosis