New Study Finds Marijuana To Be Effective Against Depression, Migraine and Anxiety

“Research has suggested that cannabis may be a promising treatment option for a number of different physical and mental health conditions, from post-traumatic stress disorder to chronic pain. A study released this week suggests that depression , anxiety and migraine can be added to that list.

Neuroscientists from the University of Buffalo’s Research Institute on Addictions found that endocannabinoids — chemical compounds in the brain that activate the same receptors as THC, an active compound in marijuana — may be helpful in treating depression, anxiety and migraine that results from chronic stress.

In studies on rats, the researchers found that chronic stress reduced the production of endocannabinoids, which affect our cognition, emotion and behavior, and have been linked to reduced feelings of pain and anxiety, increases in appetite and overall feelings of well-being. The body naturally produces these compounds, which are similar to the chemicals in cannabis. Reduction of endocannabinoid production may be one reason that chronic stress is a major risk factor in the development of depression.

Then, the research team administered marijuana cannabinoids to the rats, finding it to be an effective way to restore endocannabinoid levels in their brains — possibly, thereby, alleviating some symptoms of depression.

“Using compounds derived from cannabis — marijuana — to restore normal endocannabinoid function could potentially help stabilize moods and ease depression,” lead researcher Dr. Samir Haj-Dahmane said in a university press release.

Recent research around marijuana’s effect on symptoms of post-traumatic stress disorder further bolsters the Buffalo neuroscientists’ findings, since both disorders involve the way the brain responds to stress. A study published last year in the journal Neuropsychopharmacology, for instance, found synthetic cannabinoids triggered changes in brain centers associated with traumatic memories in rats, preventing some of the behavioral and physiological symptoms of PTSD. Another study published last year found that patients who smoked cannabis experienced a 75 percent reduction in PTSD symptoms.

However, it’s important to note that the relationship between marijuana and depression  is complex. Some research has suggested that regular and heavy marijuana smokers are at a higher risk for depression, although a causal link between cannabis use and depression has not been established. More studies are needed in order to determine whether, and how, marijuana might be used in a clinical context for patients with depression.”  http://painphysicianjournal.co/2016/06/30/new-study-finds-marijuana-to-be-effective-against-depression-migraine-and-anxiety/

New Study Finds Marijuana To Be Effective Against Depression, Migraine and Anxiety

New Study Finds Endocannabinoids May Help OCD

OCD and cannabis research

“Obsessive-Compulsive Disorder (OCD) may look different in each affected individual. One person might feel it is necessary to wash their hands constantly while others might feel obligated to count something over and over.

According to the National Institute of Mental Health, OCD is a common disorder in which a person has uncontrollable and reoccurring obsessions and compulsions. Obsessions often cause anxiety in a person, so they feel by doing compulsions, or certain behaviors, they might relieve their anxiety.

There are many treatments and medications used to combat OCD, however research is now showing that endocannabinoids can also play a huge role in OCD. The new study was funded by the The National Institute of Alcohol Abuse and Alcoholism (NIAA) and was conducted with mice. Researchers probed the brain mechanisms that are used when a mouse transitions from goal-directed behavior to habitual behaviors. They then led the mouse to receive food two ways. One way the mice received food was through doing a goal-directed behavior while the second way was through doing a habitual behavior. They then found that by deleting a certain endocannabinoid receptor, mice didn’t form habits.

This discovery led scientists to the conclusion that endocannabinoids, which are natural messengers in our bodies similar to cannabinoids found in cannabis, have a lot to do with how our brains make decisions.

George F. Koob, Ph.D. is the Director of the NIAA stated that their study revealed a mechanism in the brain that controls the transition between goal-directed behaviors and habitual behaviors. He went on to explain, “As we learn more about this mechanism, it could reveal how the brain forms habits and, more specifically, how both endocannabinoids and cannabinoid abuse can influence habitual behavior pathophysiology.”

This conclusion that our bodies natural endocannabinoids and the active ingredients in cannabis can affect memory and decision-making may give scientists a glimpse into new medications and treatments for OCD.” http://ireadculture.com/new-study-finds-endocannabinoids-may-help-ocd/

New Study Finds Endocannabinoids May Help OCD

Refractory trigeminal neuralgia responsive to nabiximols in a patient with multiple sclerosis.

“Nabiximols is a cannabinoid compound approved for the treatment of multiple sclerosis (MS)-related spasticity.

However, additional symptoms, such as pain, urinary urgency and sleep disturbance, may benefit from treatment.

CASE REPORT:

The present report describes a patient with secondary progressive MS and severe lower limbs spasticity who was started on treatment with nabiximols. The patient also suffered from trigeminal neuralgia, which he was not treating due to inefficacy or side effects of all previously tried medications. After nabiximols initiation the patient experienced a marked benefit on trigeminal neuralgia, which completely resolved, while spasticity responded only partially to treatment.

CONCLUSION:

Nabiximols mechanism of action is based on the interaction with CB1 and CB2 receptors, which are expressed by central nervous system neurons and are known to modulate pain among other effects. The present case indicates that nabiximols and other cannabinoids need to be further tested for the treatment of trigeminal neuralgia.”

http://www.ncbi.nlm.nih.gov/pubmed/27456876

“Therapeutic potential of cannabinoids in trigeminal neuralgia. Considering the pronounced antinociceptive effects produced by cannabinoids, they may be a promising therapeutic approach for the clinical management of trigeminal neuralgia.”  http://www.ncbi.nlm.nih.gov/pubmed/15578967

Should we care about sativex-induced neurobehavioral effects? A 6-month follow-up study.

“Sativex® is an exclusive cannabinoid-based drug approved for the treatment of spasticity due to Multiple Sclerosis (MS).

The most common side effects include dizziness, nausea, and somnolence. However, it is still under debate whether the drug could cause negative cognitive effects.

The aim of our study was to investigate the effect of Sativex® on functional and psychological status in cannabis-naïve MS patients.

After the treatment, we did not observe any significant neurobehavioral impairment in all the patients, but one.

Our findings suggest that Sativex® treatment does not significantly affect the cognitive and neurobehavioral functions.”

http://www.ncbi.nlm.nih.gov/pubmed/27460745

Blockade of Cannabinoid CB1 receptor attenuates the acquisition of morphine-induced conditioned place preference along with a downregulation of ERK, CREB phosphorylation, and BDNF expression in the nucleus accumbens and hippocampus.

“Cannabinoid CB1 receptor (CB1R) is highly expressed in the mesocorticolimbic system and associated with drug craving and relapse.

Clinical trials suggest that CB1R antagonists may represent new therapies for drug addiction.

Collectively, these findings demonstrate that 1) Repeated morphine with context exposures but not merely the pharmacological effects of morphine increased CB1R expression both in the NAc and hippocampus. 2) CB1R antagonist mediated blockade of ERK-CREB-BDNF signaling activation in the NAc and hippocampus may be an important mechanism underlying the attenuation of morphine CPP.”

http://www.ncbi.nlm.nih.gov/pubmed/27461790

Effects of Cannabidiol and Hypothermia on Short-Term Brain Damage in New-Born Piglets after Acute Hypoxia-Ischemia.

“Hypothermia is a standard treatment for neonatal encephalopathy, but nearly 50% of treated infants have adverse outcomes.

Pharmacological therapies can act through complementary mechanisms with hypothermia improving neuroprotection.

Cannabidiol could be a good candidate.

Our aim was to test whether immediate treatment with cannabidiol and hypothermia act through complementary brain pathways in hypoxic-ischemic newborn piglets.

Individually, the hypothermia and the cannabidiol treatments reduced the glutamate/Nacetyl-aspartate ratio, as well as TNFα and oxidized protein levels in newborn piglets subjected to hypoxic-ischemic insult. Also, both therapies reduced the number of necrotic neurons and prevented an increase in lactate/N-acetyl-aspartate ratio.

The combined effect of hypothermia and cannabidiol on excitotoxicity, inflammation and oxidative stress, and on cell damage, was greater than either hypothermia or cannabidiol alone.

The present study demonstrated that cannabidiol and hypothermia act complementarily and show additive effects on the main factors leading to hypoxic-ischemic brain damage if applied shortly after the insult.”

http://www.ncbi.nlm.nih.gov/pubmed/27462203

The CB1 Antagonist, SR141716A, Is Protective in Permanent Photothrombotic Cerebral Ischemia.

“Modulation of the endocannabinoid system has been shown to have a significant impact on outcomes in animal models of stroke.

We have previously reported a protective effect of the CB1 antagonist, SR141716A, in a transient reperfusion mouse model of cerebral ischemia. This protective effect was in part mediated by activation of the 5HT1A receptor.

Here we have examined its effect in a mouse model of permanent ischemia induced by photoinjury.

The CB1 antagonist was found to be protective in this model.

As was the case following transient ischemia reperfusion, SR141716A (5mg/kg) resulted in smaller infarct fractions and stroke volumes when utilized both as a pretreatment and as a post-treatment. In contrast to the effect in a transient ischemia model, the pretreatment effect did not depend on the 5HT1A receptor.

Neurological function correlated favorably to the reduction in stroke size when SR141716A was given as a pretreatment.

With the incidence of stroke predicted to rise in parallel with an ever aging population, understanding mechanisms underlying ischemia and therapeutics remains a paramount goal of research.”

http://www.ncbi.nlm.nih.gov/pubmed/27453059

Peripheral interactions between cannabinoid and opioid receptor agonists in a model of inflammatory mechanical hyperalgesia.

“Activation of opioid and cannabinoid receptors expressed in nociceptors induces effective antihyperalgesia.

In this study, we examined whether combinations of opioid and cannabinoid receptor agonists directed at the injured site would enhance therapeutic effectiveness.

Our findings showed that MOR and CB1 agonists directed at the inflamed site effectively attenuate mechanical hyperalgesia when administered individually, but exert opposing effects when administered together.

The antagonistic interactions between the two classes of drugs at the inflamed site suggest distinct mechanisms unique to peripheral nociceptors or inflamed tissue, and therefore require further studies to investigate whether the therapeutic utility of the combined drug treatments in chronic pain conditions can be optimized.”

http://www.ncbi.nlm.nih.gov/pubmed/27450703

Discovery of novel Tetrahydrobenzo[b]thiophene and pyrrole based scaffolds as potent and selective CB2 receptor ligands: The structural elements controlling binding affinity, selectivity and functionality.

“CB2-based therapeutics show strong potential in the treatment of diverse diseases such as inflammation, multiple sclerosis, pain, immune-related disorders, osteoporosis and cancer, without eliciting the typical neurobehavioral side effects of CB1 ligands.

For this reason, research activities are currently directed towards the development of CB2 selective ligands. Herein, the synthesis of novel heterocyclic-based CB2 selective compounds is reported.

The present findings thus pave the way to the design and optimization of heterocyclic-based scaffolds with lipophilic carboxamide and/or retroamide substituent that can be exploited as potential CB2 receptor activity modulators.”

http://www.ncbi.nlm.nih.gov/pubmed/27448919

Cannabinoid Modulation of Cutaneous Aδ Nociceptors During Inflammation

Logo of jn

“Previous studies have demonstrated that locally administered cannabinoids attenuate allodynia and hyperalgesia through activation of peripheral cannabinoid receptors (CB1 and CB2).

These results suggest that attenuation of mechanically evoked responses of Aδ nociceptors contributes to the behavioral antinociception produced by activation of peripheral CB1 receptors during inflammation.

Several studies have demonstrated that locally administered cannabinoids produce antinociception in animal models of both acute and persistent pain through peripheral mechanisms.

Taken together, our data suggest that peripherally acting cannabinoids could be a potential therapeutic treatment for chronic inflammatory pain.”

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2585399/