New approaches and challenges to targeting the endocannabinoid system.

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“The endocannabinoid signalling system was discovered because receptors in this system are the targets of compounds present in psychotropic preparations of Cannabis sativa. The search for new therapeutics that target endocannabinoid signalling is both challenging and potentially rewarding, as endocannabinoids are implicated in numerous physiological and pathological processes. Hundreds of mediators chemically related to the endocannabinoids, often with similar metabolic pathways but different targets, have complicated the development of inhibitors of endocannabinoid metabolic enzymes but have also stimulated the rational design of multi-target drugs. Meanwhile, drugs based on botanical cannabinoids have come to the clinical forefront, synthetic agonists designed to bind cannabinoid receptor 1 with very high affinity have become a societal threat and the gut microbiome has been found to signal in part through the endocannabinoid network. The current development of drugs that alter endocannabinoid signalling and how this complex system could be pharmacologically manipulated in the future are described in this Opinion article.”

Cannabinoid signalling in the immature brain: encephalopathies and neurodevelopmental disorders.

Biochemical Pharmacology

“The endocannabinoid system exerts a crucial neuromodulatory role in many brain areas that is essential for proper regulation of neuronal activity. The role of cannabinoid signalling controlling neuronal activity in the adult brain is also evident when considering its contribution to adult brain insults or neurodegenerative diseases.

In the context of brain genetic or acquired encephalopathies administration of cannabinoid-based molecules has demonstrated to exert symptomatic relief and hence, they are proposed as new potential therapeutic compounds.

This review article summarizes the main evidences indicating the beneficial action of cannabinoid-derived molecules in preclinical models of neonatal hypoxia/ischemic damage. In a second part, we discuss the available evidences of therapeutic actions of cannabidiol in children with refractory epilepsy syndromes. Finally, we discuss the current view of cannabinoid signalling mechanisms active in the immature brain that affect in neural cell fate and can contribute to long-term neural cell plasticity.”

https://www.ncbi.nlm.nih.gov/pubmed/30118663

https://www.sciencedirect.com/science/article/abs/pii/S0006295218303344

Traditional Uses of Cannabinoids and New Perspectives in the Treatment of Multiple Sclerosis.

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“Recent findings highlight the emerging role of the endocannabinoid system in the control of symptoms and disease progression in multiple sclerosis (MS). MS is a chronic, immune-mediated, demyelinating disorder of the central nervous system with no cure so far. It is widely reported in the literature that cannabinoids might be used to control MS symptoms and that they also might exert neuroprotective effects and slow down disease progression. This review aims to give an overview of the principal cannabinoids(synthetic and endogenous) used for the symptomatic amelioration of MS and their beneficial outcomes, providing new potentially possible perspectives for the treatment of this disease.”

https://www.ncbi.nlm.nih.gov/pubmed/30111755

http://www.mdpi.com/2305-6320/5/3/91

The enigma of cannabis use in spinal cord injury.

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“Cannabis use in medicine continues to confound practitioners.

There is confusing interpretation of the efficacy and adverse event data, highlighting the complexity of this unique plant.

Cannabis may have a neuroprotective role in SCI.”

Current natural therapies in the treatment against glioblastoma.

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“Glioblastoma (GBM) is the most common and aggressive brain tumor, which causes the highest number of deaths worldwide. It is a highly vascularized tumor, infiltrative, and its tumorigenic capacity is exacerbated. All these hallmarks are therapeutic targets in GBM treatment, including surgical removal followed by radiotherapy and chemotherapy.

Current therapies have not been sufficient for the effective patient’s management, so the classic therapies have had to expand and incorporate new alternative treatments, including natural compounds.

This review summarizes natural products and their physiological effects in in vitro and in vivo models of GBM, specifically by modulating signaling pathways involved in angiogenesis, cell migration/invasion, cell viability, apoptosis, and chemoresistance. The most important aspects of natural products and their derivatives were described in relation to its antitumoral effects.

As a final result, it can be obtained that within the compounds with more evidence that supports or suggests its clinical use are the cannabinoids, terpenes, and curcumin, because many have been shown to have a significant effect in decreasing the progress of GBM through known mechanisms, such as chemo-sensitization or decrease migration and cell invasion.

Natural compounds emerge as promising therapies to attack the progress of GBM.”

The Role of Cannabis within an Emerging Perspective on Schizophrenia.

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“Approximately 0.5% of the population is diagnosed with some form of schizophrenia, under the prevailing view that the pathology is best treated using pharmaceutical medications that act on monoamine receptors.

We briefly review evidence on the impact of environmental forces, particularly the effect of autoimmune activity, in the expression of schizophrenic profiles and the role of Cannabis therapy for regulating immunological functioning.

A review of the literature shows that phytocannabinoid consumption may be a safe and effective treatment option for schizophrenia as a primary or adjunctive therapy.

Conclusions: Emerging research suggests that Cannabis can be used as a treatment for schizophrenia within a broader etiological perspective that focuses on environmental, autoimmune, and neuroinflammatory causes of the disorder, offering a fresh start and newfound hope for those suffering from this debilitating and poorly understood disease.”

Acute inflammation: endogenous cannabinoids mellow the harsh proinflammatory environment.

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“Under normal conditions, there is a paucity of neutrophils within the intestinal mucosa; however, these innate immune cells rapidly infiltrate the mucosa in response to infection and are critical for pathogen control. Unfortunately, these cells can cause extensive damage to the intestine if the initial inflammatory influx is not resolved. Factors that promote resolution of inflammation are of great interest, as they have therapeutic potential for limiting uncontrolled inflammatory damage. In this issue of the JCI, Szabady et al. demonstrate that the multidrug resistance transporter P-glycoprotein (P-gp) secretes endocannabinoids into the intestinal lumen that counteract the proinflammatory actions of the eicosanoid hepoxilin A3, which is secreted into the lumen by the efflux pump MRP2 and serves as a potent neutrophil chemoattractant. Moreover, the antiinflammatory actions of P-gp-secreted endocannabinoids were mediated by peripheral cannabinoid receptor CB2 on neutrophils. Together, the results of this study identify an important mechanism by which endogenous endocannabinoids facilitate the resolution of inflammation; this mechanism has potential to be therapeutically exploited.”

Intestinal P-glycoprotein exports endocannabinoids to prevent inflammation and maintain homeostasis.

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“Neutrophil influx into the intestinal lumen is a critical response to infectious agents, but is also associated with severe intestinal damage observed in idiopathic inflammatory bowel disease. The chemoattractant hepoxilin A3, an eicosanoid secreted from intestinal epithelial cells by the apically restricted efflux pump multidrug resistance protein 2 (MRP2), mediates this neutrophil influx. Information about a possible counterbalance pathway that could signal the lack of or resolution of an apical inflammatory signal, however, has yet to be described. We now report a system with such hallmarks. Specifically, we identify endocannabinoids as the first known endogenous substrates of the apically restricted multidrug resistance transporter P-glycoprotein (P-gp) and reveal a mechanism, which we believe is novel, for endocannabinoid secretion into the intestinal lumen. Knockdown or inhibition of P-gp reduced luminal secretion levels of N-acyl ethanolamine-type endocannabinoids, which correlated with increased neutrophil transmigration in vitro and in vivo. Additionally, loss of CB2, the peripheral cannabinoid receptor, led to increased pathology and neutrophil influx in models of acute intestinal inflammation. These results define a key role for epithelial cells in balancing the constitutive secretion of antiinflammatory lipids with the stimulated secretion of proinflammatory lipids via surface efflux pumps in order to control neutrophil infiltration into the intestinal lumen and maintain homeostasis in the healthy intestine.”

https://www.ncbi.nlm.nih.gov/pubmed/30102254

https://www.jci.org/articles/view/96817

Medical marijuana laws and workplace fatalities in the United States

International Journal of Drug Policy

“The aim of this research was to determine the association between legalizing medical marijuana and workplace fatalities.

To date, 29 states and the District of Columbia have legalized the use of marijuana for medicinal purposes. Although there is increasing concern that legalizing medical marijuana will make workplaces more dangerous, little is known about the relationship between medical marijuana laws (MMLs) and workplace fatalities.

 

Findings

Legalizing medical marijuana was associated with a 19.5% reduction in the expected number of workplace fatalities among workers aged 25–44 (incident rate ratio [IRR], 0.805; 95% CI, .662–.979). The association between legalizing medical marijuana and workplace fatalities among workers aged 16–24, although negative, was not statistically significant at conventional levels. The association between legalizing medical marijuana and workplace fatalities among workers aged 25–44 grew stronger over time. Five years after coming into effect, MMLs were associated with a 33.7% reduction in the expected number of workplace fatalities (IRR, 0.663; 95% CI, .482–.912). MMLs that listed pain as a qualifying condition or allowed collective cultivation were associated with larger reductions in fatalities among workers aged 25–44 than those that did not.

Conclusions

The results provide evidence that legalizing medical marijuana improved workplace safety for workers aged 25–44. Further investigation is required to determine whether this result is attributable to reductions in the consumption of alcohol and other substances that impair cognitive function, memory, and motor skills.”

https://www.sciencedirect.com/science/article/pii/S0955395918301968

“Workplace Deaths Drop After States Legalize Medical Marijuana”  https://www.marijuanamoment.net/workplace-deaths-drop-after-states-legalize-medical-marijuana/

“Medical Marijuana States Have Lower Rates Of Workplace Death, According To New Study” https://www.civilized.life/articles/medical-marijuana-states-have-lower-rates-of-workplace-death-according-to-new-study/

“States with legal medical marijuana have seen a drop in workplace deaths” https://www.businessinsider.com/fatal-work-injuries-decline-in-states-with-medical-marijuana-laws-2019-4

“Legalizing Medical Marijuana Could Make Workplaces Safer.”  https://thefreshtoast.com/cannabis/legalizing-medical-marijuana-could-make-workplaces-safer/

Glial Endocannabinoid System in Pain Modulation.

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“Pain is affecting the human for centuries and there still is no satisfactory strategy for patients suffering pain particularly chronic pain although intensive studies about its mechanism have been performed in order to improve the treatment of pain.

Cannabinoid is a group of chemicals extracted from plants and has a long history in treating pain through the endogenous cannabinoid receptor in the body, however, its application in pain treatment is limited due to its inverse effects.

Recent studies have indicated that glial cells play critical role in mediating pain processing through multiple pathway, including excitatory and inhibitory neurotransmission in different levels of the nervous system.

Furthermore, the glial cells are found to express cannabinoid receptors.

This review summarized the recent studies about the cannabinoid system in glial cells, which may provide some insight for the studying of pain.”

https://www.ncbi.nlm.nih.gov/pubmed/30084280

https://www.tandfonline.com/doi/abs/10.1080/00207454.2018.1503178