GPR55 and glioblastoma: These ground-breaking studies have laid the foundations for future research characterising the role GPR55 plays in cancer cell proliferation and anchorage-independent growth [85], angiogenesis [86], migration [87] and metastasis [88,89], with evidence that LPI-induced GPR55 activation plays a role in prostate, ovarian, GBM, breast, skin and pancreatic cancers (reviewed in [84]).