The Antimicrobial Activity of Cannabinoids

antibiotics-logo“A post-antibiotic world is fast becoming a reality, given the rapid emergence of pathogens that are resistant to current drugs. Therefore, there is an urgent need to discover new classes of potent antimicrobial agents with novel modes of action.

Cannabis sativa is an herbaceous plant that has been used for millennia for medicinal and recreational purposes. Its bioactivity is largely due to a class of compounds known as cannabinoids.

Recently, these natural products and their analogs have been screened for their antimicrobial properties, in the quest to discover new anti-infective agents. This paper seeks to review the research to date on cannabinoids in this context, including an analysis of structure-activity relationships. It is hoped that it will stimulate further interest in this important issue.”

https://pubmed.ncbi.nlm.nih.gov/32668669/

https://www.mdpi.com/2079-6382/9/7/406

Cannabinoids-Promising Antimicrobial Drugs or Intoxicants with Benefits?

antibiotics-logo“Novel antimicrobial drugs are urgently needed to counteract the increasing occurrence ofbacterial resistance.

Extracts of Cannabis sativa have been used for the treatment of several diseases since ancient times. However, its phytocannabinoid constituents are predominantly associated with psychotropic effects and medical applications far beyond the treatment of infections.

It has been demonstrated that several cannabinoids show potent antimicrobial activity against primarily Grampositive bacteria including methicillin-resistant Staphylococcus aureus (MRSA).

As first in vivo efficacy has been demonstrated recently, it is time to discuss whether cannabinoids are promising antimicrobial drug candidates or overhyped intoxicants with benefits.”

https://pubmed.ncbi.nlm.nih.gov/32498408/

https://www.mdpi.com/2079-6382/9/6/297

Long Term Delta-9-tetrahydrocannabinol Administration Inhibits Proinflammatory Responses in Minor Salivary Glands of Chronically Simian Immunodeficieny Virus Infected Rhesus Macaques

 viruses-logo“HIV/SIV-associated oral mucosal disease/dysfunction (HAOMD) (gingivitis/periodontitis/salivary adenitis) represents a major comorbidity affecting HIV patients on anti-retroviral therapy.

Using a systems biology approach, we investigated molecular changes (mRNA/microRNA) underlying HAOMD and its modulation by phytocannabinoids (delta-9-tetrahydrocannabinol (∆9-THC)) in uninfected (n = 5) and SIV-infected rhesus macaques untreated (VEH-untreated/SIV; n = 7) or treated with vehicle (VEH/SIV; n = 3) or ∆9-THC (THC/SIV; n = 3).

Relative to controls, fewer mRNAs were upregulated in THC/SIV compared to VEH-untreated/SIV macaques. Gene enrichment analysis showed differential enrichment of biological functions involved in anti-viral defense, Type-I interferon, Toll-like receptor, RIG-1 and IL1R signaling in VEH-untreated/SIV macaques. We focused on the anti-ER-stress anterior gradient-2 (AGR2), epithelial barrier protecting and anti-dysbiotic WAP Four-Disulfide Core Domain-2 (WFDC2) and glucocorticoid-induced anti-inflammatory TSC22D3 (TSC22-domain family member-3) that were significantly downregulated in oropharyngeal mucosa (OPM) of VEH-untreated/SIV macaques.

All three proteins localized to minor salivary gland acini and secretory ducts and showed enhanced and reduced expression in OPM of THC/SIV and VEH/SIV macaques, respectively. Additionally, inflammation associated miR-21, miR-142-3p and miR-29b showed significantly higher expression in OPM of VEH-untreated/SIV macaques. TSC22D3 was validated as a target of miR-29b.

These preliminary translational findings suggest that phytocannabinoids may safely and effectively reduce oral inflammatory responses in HIV/SIV and other (autoimmune) diseases.”

https://pubmed.ncbi.nlm.nih.gov/32630206/

https://www.mdpi.com/1999-4915/12/7/713

Receptor Mechanisms Mediating the Anti-Neuroinflammatory Effects of Endocannabinoid System Modulation in a Rat Model of Migraine

European Jnl of Neuroscience – Applications sur Google Play

“Calcitonin gene-related peptide (CGRP), substance-P and dural mast cells are main contributors in neurogenic inflammation underlying migraine pathophysiology.

Modulation of endocannabinoid system attenuates migraine pain, but its mechanisms of action remains unclear.

We investigated receptor mechanisms mediating anti-neuroinflammatory effects of endocannabinoid system modulation in in-vivo migraine model and ex-vivo hemiskull preparations in rats.

Selective ligands targeting CB1 and CB2 receptors may provide novel and effective treatment strategies against migraine.”

https://pubmed.ncbi.nlm.nih.gov/32639078/

https://onlinelibrary.wiley.com/doi/abs/10.1111/ejn.14897

Phytocannabinoids: Origins and Biosynthesis

 Cell Press Internship (part 1) – lionfishexplorer“Phytocannabinoids are bioactive natural products found in some flowering plants, liverworts, and fungi that can be beneficial for the treatment of human ailments such as pain, anxiety, and cachexia. Targeted biosynthesis of cannabinoids with desirable properties requires identification of the underlying genes and their expression in a suitable heterologous host. We provide an overview of the structural classification of phytocannabinoids based on their decorated resorcinol core and the bioactivities of naturally occurring cannabinoids, and we review current knowledge of phytocannabinoid biosynthesis in Cannabis, Rhododendron, and Radula species. We also highlight the potential in planta roles of phytocannabinoids and the opportunity for synthetic biology approaches based on combinatorial biochemistry and protein engineering to produce cannabinoid derivatives with improved properties.”

https://pubmed.ncbi.nlm.nih.gov/32646718/

https://linkinghub.elsevier.com/retrieve/pii/S1360138520301874

Impact of Cannabis-Based Medicine on Alzheimer’s Disease by Focusing on the Amyloid β- Modifications: A Systematic Study

 “Deposition of amyloid-beta (Aβ) peptide in the brain is the leading source of the onset and progression of Alzheimer’s disease (AD). Recent studies have suggested that anti-amyloidogenic agents may be a suitable therapeutic strategy for AD.

Aim: The current review was proposed to address the beneficial effects of cannabis-based drugs for the treatment of AD, focusing primarily on Aβ modifications.

Result: A total of 17 studies were identified based on the inclusion criteria; however, nine studies qualified for this systematic review. The maximum and minimum cannabis dosages, mostly CBD and THC in animal studies, were 0.75 and 50 mg/kg, respectively. Cannabis (CBD and THC) was injected for 10 to 21 days. The findings of the 9 articles indicated that cannabis-based drugs might modulate Aβ modifications in several AD models.

Conclusion: Our findings establish that cannabis-based drugs inhibited the progression of AD by modulating Aβ modifications.”

https://pubmed.ncbi.nlm.nih.gov/32640965/

https://www.eurekaselect.com/183559/article

Evaluation of the Potential Use of Cannabidiol in the Treatment of Cocaine Use Disorder: A Systematic Review

 Pharmacology Biochemistry and BehaviorCannabinoids may have an important therapeutic potential for the treatment of dependence on crack cocaine.

Cannabidiol (CBD), in particular, has anxiolytic, antipsychotic and anticonvulsant properties and plays a role in regulating motivation circuitry and controlling sleep disorders. Several studies were performed evaluating CBD in experimental models for cocaine.

This systematic review aims evaluate the potential use of CBD in the treatment of cocaine use disorder.

Major findings: Fifty-one studies were analyzed, and 14 were selected. No studies conducted with humans were found; only one clinical trial was ongoing. The results were grouped into the following categories: cocaine self-administration, brain-stimulation reward, conditioned place preference, neuronal proliferation, anxiety, hepatic protection, anticonvulsant effect and locomotor sensitization response Only four studies had a low risk of bias. CBD promotes reduction on cocaine self-administration. Also, it interferes in cocaine induce brain reward stimulation and dopamine release. CBD promotes alteration in contextual memory associated with cocaine and in the neuroadaptations, hepatotoxicity and seizures induced by cocaine.

Conclusion: The evidence indicates that CBD is a promising adjunct therapy for the treatment of cocaine dependence due to its effect on: cocaine reward effects, cocaine consumption, behavioral responses, anxiety, neuronal proliferation, hepatic protection and safety. Moreover, clinical trials are strongly required to determine whether the findings in animal models occur in humans diagnosed for cocaine or crack cocaine use disorder.”

https://pubmed.ncbi.nlm.nih.gov/32645315/

“CBD is a promising adjunct therapy for the treatment of cocaine dependence. CBD promotes reduction on cocaine self-administration.”

https://www.sciencedirect.com/science/article/pii/S0091305720300307?via%3Dihub

Anticancer Effect of New Cannabinoids Derived From Tetrahydrocannabinolic Acid on PANC-1 and AsPC-1 Human Pancreas Tumor Cells

View details for Journal of Pancreatic Cancer cover image

“New tetrahydrocannabinolic acid (THCA) derivatives ALAM027 and ALAM108 were proposed for the treatment of the pancreatic cancer disease.

Methods: The in vitro effect of new cannabinoids ALAM027 and ALAM108 was tested against PANC-1 and AsPC-1 cell lines by CellTiter Glo assay. Pancreatic cancer xenograft model was used for the in vivo anticancer activity study of these compounds on PANC-1 cells.

Results: The in vitro study of new cannabinoids showed greater activity of ALAM108 than ALAM027 both for PANC-1 and AsPC-1 cells. The in vivo study of new cannabinoids on PANC-1 cells showed that their oral administration was effective in reducing tumor volume and tumor weight, and did not lead to any discomfort and weight loss of mice.

Conclusion: The cannabinoids ALAM108 and ALAM027 inhibited the tumor growing 1.6-2 times in mice with human PANC-1 cells.”

https://pubmed.ncbi.nlm.nih.gov/32642629/

“The in vitro study of new cannabinoids showed greater activity of ALAM108 than of ALAM027 both for PANC-1 and AsPC-1 pancreas tumor cells. The in vivo study of these cannabinoids on PANC-1 cells showed that their oral administration decreased the tumor size 1.6–2 times and did not lead to any discomfort, psychotic effects, and weight loss of mice. Further study of these compounds will allow to determine the mechanism of their action on cancer cells and may open the way to new therapeutic drugs based on THCA.”

https://www.liebertpub.com/doi/10.1089/pancan.2020.0003

FIG. 1.

Cannabinoids and Cannabinoid Receptors: The Story So Far

 iScience journal (@iScience_CP) | Twitter“Like most modern molecular biology and natural product chemistry, understanding cannabinoid pharmacology centers around molecular interactions, in this case, between the cannabinoids and their putative targets, the G-protein coupled receptors (GPCRs) cannabinoid receptor 1 (CB1) and cannabinoid receptor 2 (CB2). Understanding the complex structure and interplay between the partners in this molecular dance is required to understand the mechanism of action of synthetic, endogenous, and phytochemical cannabinoids. This review, with 91 references, surveys our understanding of the structural biology of the cannabinoids and their target receptors including both a critical comparison of the extant crystal structures and the computationally derived homology models, as well as an in-depth discussion about the binding modes of the major cannabinoids. The aim is to assist in situating structural biochemists, synthetic chemists, and molecular biologists who are new to the field of cannabis research.”

https://pubmed.ncbi.nlm.nih.gov/32629422/

https://www.cell.com/iscience/pdf/S2589-0042(20)30488-0.pdf?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS2589004220304880%3Fshowall%3Dtrue

Cannabinoids in Multiple Sclerosis: A Neurophysiological Analysis

Publication cover image “Objectives: To investigate the action of cannabinoids on spasticity and pain in secondary progressive multiple sclerosis, by means of neurophysiological indexes.

Conclusions: The THC-CBD spray improved spasticity and pain in secondary progressive MS patients. The spray prolonged CSP duration, which appears a promising tool for assessing and monitoring the analgesic effects of THC-CBD in MS.”

https://pubmed.ncbi.nlm.nih.gov/32632918/

https://onlinelibrary.wiley.com/doi/abs/10.1111/ane.13313