Ontology type: schema:ScholarlyArticle Open Access: True
2017-12
AUTHORSArianna Bettiga, Massimo Aureli, Giorgia Colciago, Valentina Murdica, Marco Moschini, Roberta Lucianò, Daniel Canals, Yusuf Hannun, Petter Hedlund, Giovanni Lavorgna, Renzo Colombo, Rosaria Bassi, Maura Samarani, Francesco Montorsi, Andrea Salonia, Fabio Benigni
ABSTRACTThe inhibitory effects demonstrated by activation of cannabinoid receptors (CB) on cancer proliferation and migration may also play critical roles in controlling bladder cancer (BC). CB expression on human normal and BC specimens was tested by immunohistochemistry. Human BC cells RT4 and RT112 were challenged with CB agonists and assessed for proliferation, apoptosis, and motility. Cellular sphingolipids (SL) constitution and metabolism were evaluated after metabolic labelling. CB1-2 were detected in BC specimens, but only CB2 was more expressed in the tumour. Both cell lines expressed similar CB2. Exposure to CB2 agonists inhibited BC growth, down-modulated Akt, induced caspase 3-activation and modified SL metabolism. Baseline SL analysis in cell lines showed differences linked to unique migratory behaviours and cytoskeletal re-arrangements. CB2 activation changed the SL composition of more aggressive RT112 cells by reducing (p < 0.01) Gb3 ganglioside (-50 ± 3%) and sphingosine 1-phosphate (S1P, -40 ± 4%), which ended up to reduction in cell motility (-46 ± 5%) with inhibition of p-SRC. CB2-selective antagonists, gene silencing and an inhibitor of SL biosynthesis partially prevented CB2 agonist-induced effects on cell viability and motility. CB2 activation led to ceramide-mediated BC cell apoptosis independently of SL constitutive composition, which instead was modulated by CB2 agonists to reduce cell motility. More... »
PAGES42157
http://scigraph.springernature.com/pub.10.1038/srep42157
DOIhttp://dx.doi.org/10.1038/srep42157
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PUBMEDhttps://www.ncbi.nlm.nih.gov/pubmed/28191815
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