Cannabis II Flashcards
Cannabis Sativa (hemp) - plant stems
- source of fiber
- rope and canvas cloth
- bast fibers
Cannabis Sativa (hemp) - seeds
- rich in oil, low in psychoactive chemicals
- soaps, lamp oil, paint base
History of Cannabis Sativa
- traditional medicine
- leaves and seeds : pain relief, sleep induction, soothing agent for nervous disorders
- root: Medieval Europe, gout, ground-up root mixed with oil and butter, salve to treat burns
Psychoactive Nature of Cannabis (old world)
- smoking cannabis
- ancient practice
- China: pre-christian era = liberator of sin, post-christian= delight giver
- hindu culture: heavenly guide, soother of grief
Cannabis Sativa
- psychoactive
- sub-variety Cannabis sativa L. - hemp - no medicinal properties
- annotated by Carl Linnaeus
- invigorating, uplifiting cerebral effects
Cannabis indica
- annotated by French naturalist Jean-Baptiste Lamarck
- physically sedating, relaxing
Cannabis ruderalis
- annotated by Russian botanist D.E. Janischevisky
- rare
Production of Cannabinoids
- major psychoactive ingredients
- lipid-soluble phenolic compounds
- could be referred to as Terpenophenolics
Cannabinoids (how many in Cannabis)
- over 113 identified in Cannabis
- 11 are related to THC
Nabilone
- synthetic cannabinoid
- mimics THC
- therapeutic use: antiemetic, analgesic for neuropathic pain
Tetrahydrocannabinol
- THC
- concentrated in resin of plant
- major location is in flowering tops and very young leaves (in sub epidermal cells of these tissues)
- less in mature leaves
- even less in fibrous stalks and mature seeds
First Approach in Consumption
- resin harvesting : several approaches, evolved in India
- pure resin: removed from surface of young leaves and flowers (high potency and THC content)
Second Approach in Consumption
- plants with unfertilized female flowers (tops are collected)
- male plants removed before pollen production (female plants are not fertilized)
- female plant diverts energy into seed production
- plant material is dried (ganja- india, Sinsemilla-mexico, marijuana - USA)
Third approach in Consumption
- remaining plant material after tops have been harvested
- dried, ground into a powder
- bhang (India, low grade < 1% THC)
Bhang
- often added to drinks or candies
- india, used during religious festivals
- added to milkshakes
What year is THC isolated and synthesized
1964
Absorption and metabolism of THC
- THC rapidly absorbed into blood (first reaches brain then redistributes to rest of body)
THC is metabolized in liver
Physiological effects of THC on CNS
- alters the electrical properties of nerve membranes
- alters turnover rates of serotonin and dopamine
- affects prostaglandin synthesis
The Cannabis High
- initial effect: mild tension or anxiety
- followed by pleasant feeling of wellbeing
- user can become introspective and tranquil
- can experience rapid mood changes
- moments of hilarity followed by periods of contemplative silence
Optimum Quantities to achieve state of euphoria vs. hallucinogenic effects
- state of euphoria: 25-50ug/kilo body weight THC
- hallucinogenic effects:200-250 ug/kilo body weight THC
Medicinal Uses of THC
- neuralgia
- mental depression
- rheumatism
- control epileptic seizures
- control epileptic seizures
- types of glaucoma
- also controls nausea caused by radiation therapy and chemotherapy
What two drugs are used to control nausea by radiation therapy and chemotherapy
- marinol (2.5-10 mg of THC)
- nabilone (contains a THC analogue - Eli Lilly)
Why does THC have medicinal effects?
Endocannabinoids
- anandamide (AEA)
- 2-arachidonoglycerol (2-AG)
Anandamide (AEA)
- endogenous cannabinoid NT
- is synthesized form N-arachidonoyl phosphatidyethanolamine by multiple pathways
- is degraded primarily by the fatty acid FAAH
- converts anandamide into ethanolamine and aracadonic acid
- inhibitors of FAAH lead to elevatid anandamide levels
2- arachidonoglycerol (2-AG)
- endocannbinoid
- endogenous agonist of CB1 receptor
- is an ester formed from the arachidonic acid and glycerol
What physiological processes does the endocannabinoid system?
pain modulation, memory, and appetite plus anti-inflammatory effects and other immune system responses
CB1 receptors
are primarily found in the brain and CNS
CBD
- does not directly “fit”
- CB1 or CB2 receptors bet powerful indirect effects still being studied
CB2
- CB2 receptors are mostly in the perepheral organs especially cells associated with the immune system