Cannabinoid derivatives induce cell death in pancreatic MIA PaCa-2 cells via a receptor-independent mechanism

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• 作者：Stefano Fogli ; Paola Nieri ; Andrea Chicca ; Barbara Adinolfi ; Veronica Mariotti ; Paola Iacopetti ; Maria Cristina Breschi and Silvia Pellegrini
• 关键词：Cannabinoids ; Pancreatic cancer ; Apoptosis ; Microarray ; Synergism
• 刊名：FEBS Letters
• 出版年：2006
• 出版时间：20 March 2006
• 年：2006
• 卷：580
• 期：7
• 页码：1733-1739
• 全文大小：265 K

文摘

Cannabinoids (CBs) are implicated in the control of cell survival in different types of tumors, but little is known about the role of CB system in pancreatic cancer. Herein, we investigated the in vitro antitumor activity of CBs and the potential role of their receptors in human pancreatic cancer cells MIA PaCa-2. Characterization tools used for this study included growth inhibition/cell viability analyses, caspase 3/7 induction, DNA fragmentation, microarray analysis and combination index-isobologram method. Our results demonstrate that CBs produce a significant cytotoxic effect via a receptor-independent mechanism. The CB₁ antagonist N-(piperidin-1-1yl)-5-(4-iodophenyl)-1-(2,4-dichlorophenyl)-4-methyl-1H-pyrazole-3-carboxamide (AM251) was the most active compound with an IC₅₀ of 8.6 ± 1.3 μM after 72 h. AM251 induces apoptosis, causes transcriptional changes of genes in janus kinase/signal transducers and activators of transcription signaling network and synergistically interacts with the pyrimidine analogue, 5-fluorouracil. These findings exclude the involvement of CB receptors in the regulation of MIA PaCa-2 cell growth and put AM251 forward as a candidate for the development of novel compounds worthy to be tested in this type of neoplasia.