Cystitis is an infection of the urinary tract. The bladder and other tissues of the urinary tract express CB1, CB2, TRPV1 and PPARα offering therpeutic potential for cannabinoids in the treatment of Cystitis. However, the exact mechanism through which cannabinoids work in Cystitis remains to be elucidated.
Interestingly, the opposite was found in another study where boosting Anandamide levels by preventing its breakdown exerted potent analgesic and anti-inflammatory effects (Wang et al., 2015). FAAH was responsible of breaking down Anandamide.
Another rat study found that endocannabinoid PEA and CB1 were upregulated, PPARα was downregulated and CB2 was unchanged upon induction of Cystitis (Pessina et al., 2014). PEA attenuated pain and bladder voiding. This effect was blocked by CB1 and PPARα antagonists.
Several studies found that CB2 was upregulated with Cystitis (Merriam et al., 2008; Tambaro et al., 2014) and that activation of CB2 with Anandamide or PEA attenuated pain and inflammation (Jaggar et al., 1998; Wang et al., 2013, 2014).
CBG reduces acetylcholine-induced contractions in the bladder, suggesting a potential effect to treat bladder disorders (Pagano et al., 2015).
Dinis, P., Charrua, A., Avelino, A., Yaqoob, M., Bevan, S., Nagy, I., and Cruz, F. (2004). Anandamide-evoked activation of vanilloid receptor 1 contributes to the development of bladder hyperreflexia and nociceptive transmission to spinal dorsal horn neurons in Cystitis. J. Neurosci. Off. J. Soc. Neurosci. 24, 11253–11263.
Jaggar, S.I., Hasnie, F.S., Sellaturay, S., and Rice, A.S. (1998). The anti-hyperalgesic actions of the cannabinoid Anandamide and the putative CB2 receptor agonist palmitoylethanolamide in visceral and somatic inflammatory pain. pain 76, 189–199.
Merriam, F.V., Wang, Z., Guerios, S.D., and Bjorling, D.E. (2008). cannabinoid receptor 2 is increased in acutely and chronically inflamed bladder of rats. Neurosci. Lett. 445, 130–134.
Pagano, E., Montanaro, V., Di Girolamo, A., Pistone, A., Altieri, V., Zjawiony, J. K., … Capasso, R. (2015). Effect of Non-psychotropic Plant-derived cannabinoids on Bladder Contractility: Focus on Cannabigerol. Natural Product Communications, 10(6), 1009-1012.
Pessina, F., Capasso, R., Borrelli, F., Aveta, T., Buono, L., Valacchi, G., Fiorenzani, P., Di Marzo, V., Orlando, P., and Izzo, A.A. (2014). Protective Effect of Palmitoylethanolamide in a Rat Model of Cystitis. J. Urol.
Tambaro, S., Casu, M.A., Mastinu, A., and Lazzari, P. (2014). Evaluation of selective cannabinoid CB(1) and CB(2) receptor agonists in a mouse model of lipopolysaccharide-induced interstitial Cystitis. Eur. J. Pharmacol. 729, 67–74.