t- cannabis Flashcards
phytocannabinoids (delta-9-tetrahydrocannabinol)
structurally different but pharmacologically similar to bodys endocannabinoids
glandular trichomes
hair like strands that secrete
packed into buds at the top of the flower
cannabidiol
(CBD) non psychoactive component that may have therapeutic properties
anticonvulsant, anti-inflammatory, analgesic, anxiolytic
hash
very concentrated purified, dabs
butane extracted hash oil- BHO: shatter
anandamide
N-acachidonyl ethalomide (AE) or 2-arachidonyl glycerol (2-AG) endocanabinoids synthesized from phospholipids in cell membranes
implicated in hunger pathways (BOTH CNS and PNS)
EXTRACTED: nabiximols (trade name Sativex)
SYNTHETICS: nabilone (cesamat)
dronabinol (marinol)
- buccal spray developed to treat MS symptoms
neuropathic pain/spacitisity - orally administered tablets used to treat AIDs related anorexia and nausea
SYNTHETIC RECEPTOR ANTAGONIST: rimonabant (Acomplia)
- blocks CB1 receptors and acts as an inverse agonist to facilitate effects opposite of cannabinoid agonists
- appetite suppressnat and anti obesity
recreational synthaocannabinoids- herbal incense
compounds sold as synthetic marijuana to be smoked for recreational use
dont contain cannabis plant material
uneven distribution making dosages unpredictable
absorption
oral- low bioavailbility due to lipid solubility and water insolubility, increased when added oil/fat
inhalation- rapidly absorped into respiratory tract
but do lose product through smoke
spray - pharmaceutical use, slower absorption and bioavailability
distribution
quickly removed from body
depends on rate of blood flow
long term storage in body fat - not in brain
elminiation
some metabolism in lungs, some in intestines
most occurs in liver - CYC p450 enzymes
metabolite: 11-OH-THC
once broken down they are attached to O-esterglucoronide
can last 4 days to a few weeks
CBD role in metabolism
doesnt have psychotropic effects but can inhibit CYP2C9 on THC breakdown and prolonging it
neuropharmacology of THC
high affinity selective cannabinoid receptor in brain tissue - CB1& CB2
G protein coupled receptors that inhibits adenylyl cyclase reducing cAMP and PKA also inhibits Ca channels leading to hyperpolarization and inhibit transmitter release
cannabinoid receptors in body
CB1- primarily responsible for CNS on presynaptic terminals
mediate the psychoactive effects of THC (euphoria)
CB2- primarily in PNS, play a role in immune system
synthesizing endocannabinoids
not packaged in vesicles , made on demand
functions as a modulator of other NTs
increase firing of dopamine neurons in striatum (by inhibiting GABA)