“Glioblastoma multiforme (GBM) is the most common and aggressive form of primary malignant brain tumor in adults, with poor prognosis. Extracellular vesicles (EVs) are key-mediators for cellular communication through transfer of proteins and genetic material. Cancers, such as GBM, use EV release for drug-efflux, pro-oncogenic signaling, invasion and immunosuppression; thus the modulation of EV release and cargo is of considerable clinical relevance. As EV-inhibitors have been shown to increase sensitivity of cancer cells to chemotherapy, and we recently showed that cannabidiol (CBD) is such an EV-modulator, we investigated whether CBD affects EV profile in GBM cells in the presence and absence of temozolomide (TMZ). Compared to controls, CBD-treated cells released EVs containing lower levels of pro-oncogenic miR21 and increased levels of anti-oncogenic miR126; these effects were greater than with TMZ alone. In addition, prohibitin (PHB), a multifunctional protein with mitochondrial protective properties and chemoresistant functions, was reduced in GBM cells following 1 h CBD treatment. This data suggests that CBD may, via modulation of EVs and PHB, act as an adjunct to enhance treatment efficacy in GBM, supporting evidence for efficacy of cannabinoids in GBM.”
https://www.ncbi.nlm.nih.gov/pubmed/30597288
“Cannabidiol (CBD) is a phytocannabinoid derived from Cannabis sativa and known for its anti-neoplastic and chemo-preventive activities. Known anti-cancerous effects of cannabinoids include inhibition of tumor proliferation, angiogenesis and induction of tumor cell death, while in GBM, additional effects on inhibition of invasiveness and stem-cell like properties have been observed. CBD has also been shown to selectively inhibit GBM proliferation and to induce death of cultured human GBM cells, as well as being effective against other cancers. We have recently shown that CBD is a novel modulator of EV release in several cancer cell lines and we and other groups have shown that EV-modulators, including CBD, can significantly increase sensitivity of various cancer cells to chemotherapy. This supports emerging evidence that CBD has anti-cancer effects and indicates that CBD can be used to lower anti-chemotherapeutic responses to TMZ as well as modifying EV cargo to an anti-oncogenic signature in GBM.”
https://www.sciencedirect.com/science/article/pii/S1936523318305990?via%3Dihub