January 19, 2018 -BY BONNI GOLDSTEIN, M.D.
As access to cannabis widens and research into the medicinal effects of its compounds expands, we’re learning there’s much more to the cannabis plant than THC and CBD. One of the most interesting cannabinoids in cannabis is tetrahydrocannabivarin or THCV. Preliminary studies show promising therapeutic effects for different ailments including diabetes and Parkinson’s disease.
THCV results from a different chemical pathway than THC. Geranyl pyrophosphate joins with divarinolic acid to make cannabigerovarin acid (CBGVA), which changes to tetrahydrocannabivarin carboxylic acid (THCVA) when exposed to the enzyme THCV. When THCVA is heated, it decarboxylates to THCV.
Like other cannabinoids, THCV has biphasic effects, meaning it has differing effects on the body at different doses and blood concentration levels. At low doses, THCV is a neutral antagonist of the CB1 receptor, binding to the receptor without causing any effects; however, at this low dose, it blocks other compounds (like THC) from binding to the receptor. THCV is also a CB2 agonist, binding to this receptor — which is mostly located in the immune system and gut — giving anti-inflammatory and analgesic effects.
Research shows at higher doses, THCV has the opposite effect at the CB1 receptor, binding to it and activating it, which expectedly should cause some psychoactivity. Interestingly, participants in a study who received THCV were unable to distinguish it from a placebo as they felt no intoxicating effects. In the same study, the subjects reported that when they were given both THC and THCV together, the effects of THC were weaker or less intense.
THCV is being investigated as an “anti-obesity and anti-type-2-diabetes” agent as it improved glucose intolerance and increased insulin sensitivity in obese mice. Additionally, the cannabinoid was shown to be a neuroprotective agent and relieved symptoms in an animal model of Parkinson’s disease.
Another animal study demonstrated that THCV may have potent anti-nausea effects.
Anecdotally, patients who have tried THCV-rich strains report appetite suppression, less anxiety, fewer tremors, and pain relief. These strains are often recommended to those suffering PTSD who want help decreasing anxiety without becoming intoxicated.
THCV is a secondary cannabinoid (THC and CBD being the primary cannabinoids) and most cannabis plants contain very small amounts. However, there are a number of strains that have, on analytical testing, shown to contain physiologically significant levels of THCV. These strains include Black Beauty, Doug’s Varin, Durbin Poison, and Malawi Gold.
Sources:
Englund, Amir, et al. “The effect of five day dosing with THCV on THC-induced cognitive, psychological and physiological effects in healthy male human volunteers: A placebo-controlled, double-blind, crossover pilot trial.” Journal of Psychopharmacology 30.2 (2016): 140-151.
Garcia, C., et al. “Symptom‐relieving and neuroprotective effects of the phytocannabinoid Δ9‐THCV in animal models of Parkinson’s disease.” British journal of pharmacology 163.7 (2011): 1495-1506.
Pertwee, Roger Guy, et al. “The psychoactive plant cannabinoid, Δ9‐tetrahydrocannabinol, is antagonized by Δ8‐and Δ9‐tetrahydrocannabivarin in mice in vivo.” British journal of pharmacology 150.5 (2007): 586-594.
Rock, Erin M., et al. “Evaluation of the potential of the phytocannabinoids, cannabidivarin (CBDV) and Δ9‐tetrahydrocannabivarin (THCV), to produce CB1 receptor inverse agonism symptoms of nausea in rats.” British journal of pharmacology 170.3 (2013): 671-678.
Wargent, E. T., et al. “The cannabinoid Δ9-tetrahydrocannabivarin (THCV) ameliorates insulin sensitivity in two mouse models of obesity.” Nutrition & diabetes 3.5 (2013): e68.
https://www.marijuana.com/news/2018/01/know-your-medicine-thcv/
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