GPR55 and neurodegenerative disease: Given GPR55’s apparent role in neuroinflammation, excitotoxicity, oxidative stress and mitochondrial dysfunction closely linked to neurodegenerative processes [24,25], the development of novel GPR55 modulators could not only represent a key step to better understanding the precise role of this receptor in neuroprotection, but also provide a potential innovative therapeutic strategy for the treatment of neurodegenerative diseases with a neuroinflammatory background.