Category Archives: Uncategorized

Activity of THC, CBD, and CBN on Human ACE2 and SARS-CoV1/2 Main Protease to Understand Antiviral Defense Mechanism

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“THC, CBD, and CBN were reported as promising candidates against SARS-CoV2 infection, but the mechanism of action of these three cannabinoids is not understood.

This study aims to determine the mechanism of action of THC, CBD, and CBN by selecting two essential targets that directly affect the coronavirus infections as viral main proteases and human angiotensin-converting enzyme2.

Tested THC and CBD presented a dual-action action against both selected targets. Only CBD acted as a potent viral main protease inhibitor at the IC50 value of 1.86 ± 0.04 µM and exhibited only moderate activity against human angiotensin-converting enzyme2 at the IC50 value of 14.65 ± 0.47 µM.

THC acted as a moderate inhibitor against both viral main protease and human angiotensin-converting enzymes2 at the IC50 value of 16.23 ± 1.71 µM and 11.47 ± 3.60 µM, respectively.

Here, we discuss cannabinoid-associated antiviral activity mechanisms based on in silico docking studies and in vitro receptor binding studies.”

https://pubmed.ncbi.nlm.nih.gov/34638139/

https://www.thieme-connect.de/products/ejournals/abstract/10.1055/a-1581-3707

Cannabidiol inhibits SARS-Cov-2 spike (S) protein-induced cytotoxicity and inflammation through a PPARγ-dependent TLR4/NLRP3/Caspase-1 signaling suppression in Caco-2 cell line

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Phytotherapy Research“Given the abundancy of angiotensin converting enzyme 2 (ACE-2) receptors density, beyond the lung, the intestine is considered as an alternative site of infection and replication for severe acute respiratory syndrome by coronavirus type 2 (SARS-CoV-2).

Cannabidiol (CBD) has recently been proposed in the management of coronavirus disease 2019 (COVID-19) respiratory symptoms because of its anti-inflammatory and immunomodulatory activity exerted in the lung.

In this study, we demonstrated the in vitro PPAR-γ-dependent efficacy of CBD (10-9 -10-7 M) in preventing epithelial damage and hyperinflammatory response triggered by SARS-CoV-2 spike protein (SP) in a Caco-2 cells. Immunoblot analysis revealed that CBD was able to reduce all the analyzed proinflammatory markers triggered by SP incubation, such as tool-like receptor 4 (TLR-4), ACE-2, family members of Ras homologues A-GTPase (RhoA-GTPase), inflammasome complex (NLRP3), and Caspase-1.

CBD caused a parallel inhibition of interleukin 1 beta (IL-1β), IL-6, tumor necrosis factor alpha (TNF-α), and IL-18 by enzyme-linked immunosorbent assay (ELISA) assay. By immunofluorescence analysis, we observed increased expression of tight-junction proteins and restoration of transepithelial electrical resistance (TEER) following CBD treatment, as well as the rescue of fluorescein isothiocyanate (FITC)-dextran permeability induced by SP.

Our data indicate, in conclusion, that CBD is a powerful inhibitor of SP protein enterotoxicity in vitro.”

https://pubmed.ncbi.nlm.nih.gov/34643000/

https://onlinelibrary.wiley.com/doi/10.1002/ptr.7302

Inducing Effects of Illegal Drugs to Improve Mental Health by Self-Regulation Therapy: A Pilot Study

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ijerph-logo“This study consists of a brief psychological intervention, which uses Self-Regulation Therapy (SRT, procedure based on suggestion and classical conditioning), to improve coping with stress and emotionality by reproducing the positive effects of illegal drugs: cannabis, cocaine, ecstasy.

Results: SRT was superior to non-intervention for the 4 coping strategies (η2 = 0.829, 0.453, 0.411 and 0.606) and for positive (η2 = 0.371) and negative emotionality (η2 = 0.419). An improvement in scores was evidenced in the follow-up scores compared to the pre-intervention measures.

Conclusions: This study shows for the first time that it is possible to use illegal drugs, considered harmful to public health, to improve young people’s coping capacity and emotionality by reproducing their positive effects with SRT.”

https://pubmed.ncbi.nlm.nih.gov/34639687/

https://www.mdpi.com/1660-4601/18/19/10387

Efficacy of Δ 9 -Tetrahydrocannabinol (THC) Alone or in Combination With a 1:1 Ratio of Cannabidiol (CBD) in Reversing the Spatial Learning Deficits in Old Mice

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Archive of "Frontiers in Aging Neuroscience".“Decline in cognitive performance, an aspect of the normal aging process, is influenced by the endocannabinoid system (ECS). Cannabinoid receptor 1 (CB1) signaling diminishes with advancing age in specific brain regions that regulate learning and memory and abolishing CB1 receptor signaling accelerates cognitive aging in mice.

We recently demonstrated that prolonged exposure to low dose (3 mg/kg/day) Δ9-tetrahydrocannabinol (THC) improved the cognitive performances in old mice on par with young untreated mice. Here we investigated the potential influence of cannabidiol (CBD) on this THC effect, because preclinical and clinical studies indicate that the combination of THC and CBD often exhibits an enhanced therapeutic effect compared to THC alone.

We first tested the effectiveness of a lower dose (1 mg/kg/day) THC, and then the efficacy of the combination of THC and CBD in 1:1 ratio, same as in the clinically approved medicine Sativex®. Our findings reveal that a 1 mg/kg/day THC dose still effectively improved spatial learning in aged mice. However, a 1:1 combination of THC and CBD failed to do so.

The presence of CBD induced temporal changes in THC metabolism ensuing in a transient elevation of blood THC levels. However, as CBD metabolizes, the inhibitory effect on THC metabolism was alleviated, causing a rapid clearance of THC. Thus, the beneficial effects of THC seemed to wane off more swiftly in the presence of CBD, due to these metabolic effects.

The findings indicate that THC-treatment alone is more efficient to improve spatial learning in aged mice than the 1:1 combination of THC and CBD.”

https://pubmed.ncbi.nlm.nih.gov/34526890/

“In conclusion, our observations indicate that 1 mg/kg/day THC dose is still effective in improving the spatial learning in aged mice. With regard to the efficacy, THC-alone has proved to be more efficient in improving spatial learning in aged mice than its 1:1 combination with CBD. However, the possibility of THC/CBD being efficient in other ratios or at the earliest time-points, like immediately after the treatment cease, cannot be negated. Possibly, reducing the dose of CBD may improve the efficacy of the THC/CBD combination.”

https://www.frontiersin.org/articles/10.3389/fnagi.2021.718850/full

Cannabidiol enhances verbal episodic memory in healthy young participants: A randomized clinical trial

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Journal of Psychiatric Research“Cannabis contains a multitude of different compounds. One of them, cannabidiol – a non-psychoactive substance – might counteract negative effects of Δ-9-Tetrahydrocannabinol on hippocampus-dependent memory impairment.

The aim of the present study was to investigate the effect of vaping cannabidiol on verbal episodic memory in healthy young subjects.

We used a double-blind, placebo-controlled, randomized crossover trial in 39 healthy young subjects. Participants received once a single dose of cannabidiol e-liquid (0.25 ml, 5% cannabidiol, 12.5 mg cannabidiol) and once placebo for vaping after learning 15 unrelated nouns. The primary outcome measure was the short delay verbal memory performance (number of correctly free recalled nouns) 20 min after learning. 34 participants (mean age: 22.26 [3.04]) completed all visits and entered analyses (17 received cannabidiol and 17 received placebo first).

Cannabidiol enhanced verbal episodic memory performance (placebo: 7.03 [2.34]; cannabidiol 7.71 [2.48]; adjusted group difference 0.68, 95% CI 0.01 to 1.35; R2β = .028, p = .048). Importantly, we did not detect medication effects on secondary outcome measures attention or working memory performance, suggesting that CBD has no negative impact on these basic cognitive functions.

The results are in line with the idea that vaping cannabidiol interacts with the central endocannabinoid system and is capable to modulate memory processes, a phenomenon with possible therapeutic potential. Further studies are needed to investigate optimal dose-response and time-response relationships.”

https://pubmed.ncbi.nlm.nih.gov/34536664/

“To conclude, while further research is needed to identify dose-response and time-response relationships, our results show that CBD can improve episodic memory, a drug effect with possible therapeutic potential.”

https://www.sciencedirect.com/science/article/pii/S002239562100546X?via%3Dihub

Cannabidiol Exposure During the Mouse Adolescent Period Is Without Harmful Behavioral Effects on Locomotor Activity, Anxiety, and Spatial Memory

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Archive of "Frontiers in Behavioral Neuroscience".“Cannabidiol (CBD) is a non-intoxicating phytocannabinoid whose purported therapeutic benefits and impression of a high safety profile has promoted its increasing popularity.

CBD’s popularity is also increasing among children and adolescents who are being administered CBD, off label, for the treatment of numerous symptoms associated with autism spectrum disorder, attention deficit hyperactivity disorder, anxiety, and depression. The relative recency of its use in the adolescent population has precluded investigation of its impact on the developing brain and the potential consequences that may present in adulthood. Therefore, there’s an urgency to identify whether prolonged adolescent CBD exposure has substantive impacts on the developing brain that impact behavioral and cognitive processes in adulthood.

Here, we tested the effect of twice-daily intraperitoneal administrations of CBD (20 mg/kg) in male and female C57BL/6J mice during the adolescent period of 25-45 days on weight gain, and assays for locomotor behavior, anxiety, and spatial memory. Prolonged adolescent CBD exposure had no detrimental effects on locomotor activity in the open field, anxiety behavior on the elevated plus maze, or spatial memory in the Barnes Maze compared to vehicle-treated mice. Interestingly, CBD-treated mice had a faster rate of learning in the Barnes Maze. However, CBD-treated females had reduced weight gain during the exposure period.

We conclude that prolonged adolescent CBD exposure in mice does not have substantive negative impacts on a range of behaviors in adulthood, may improve the rate of learning under certain conditions, and impacts weight gain in a sex-specific manner.”

https://pubmed.ncbi.nlm.nih.gov/34512286/

“Cannabidiol (CBD) is one of the most abundant cannabinoids naturally produced by the plant, Cannabis sativa, and the dominant phytocannabinoid produced by the hemp variety. We report that multiple daily doses of a moderate CBD dose throughout the adolescent developmental period does not negatively impact locomotor behavior, anxiety, and spatial learning in healthy C57BL/6J mice. Further, the faster acquisition rate of a spatial learning task may highlight CBD’s potential protective benefits against stressors.”

https://www.frontiersin.org/articles/10.3389/fnbeh.2021.711639/full

Targeting of Protein’s Messenger RNA for Viral Replication, Assembly and Release in SARS-CoV-2 Using Whole Genomic Data From South Africa: Therapeutic Potentials of Cannabis Sativa L

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frontiers in pharmacology – Retraction Watch“The possible evolutionary trend of COVID-19 in South Africa was investigated by comparing the genome of SARS-CoV-2 isolated from a patient in KwaZulu-Natal, South Africa with those isolated from China, Spain, Italy, and United States, as well as the genomes of Bat SARS CoV, Middle East Respiratory Syndrome Coronavirus (MERS-CoV), Mouse Hepatitis Virus (MHV), and Infectious Bronchitis Virus (IBV). Phylogenetic analysis revealed a strong homology (96%) between the genomes of SARS-CoV-2 isolated from KwaZulu-Natal, South Africa and those isolated from the study countries as well as those isolated from bat SARS CoV, MERS-CoV, MHV and IBV.

The ability of phytocannabinoids from Cannabis sativa infusion to interact with gene segments (mRNAs) coding for proteins implicated in viral replication, assembly and release were also investiagted using computational tools. Hot water infusion of C. sativa leaves was freeze-dried and subjected to Gas Chromatography-Mass Spectroscopy analysis which revealed the presence of tetrahydrocannabivarin, cannabispiran, cannabidiol tetrahydrocannabinol, cannabigerol, and cannabinol. Molecular docking analysis revealed strong binding affinities and interactions between the phytocannabinoids and codon mRNAs for ORF1ab, Surface glycoprotein, Envelope protein and Nucleocapsid phosphoprotein from SARS-CoV-2 whole genome which may be due to chemico-biological interactions as a result of nucleophilic/electrophilic attacks between viral nucleotides and cannabinoids.

These results depict the spread of SARS-CoV-2 is intercontinental and might have evolved from other coronaviruses. The results also portray the phytocannabinoids of C. sativa infusion as potential therapies against COVID-19 as depicted by their ability to molecularly interact with codon mRNAs of proteins implicated in the replication, translation, assembly, and release of SARS-CoV-2. However, further studies are needed to verify these activities in pre-clinical and clinical studies.”

https://pubmed.ncbi.nlm.nih.gov/34539415/

“Taken together, the results from this study indicates a homology between the genome of SARS-CoV-2 isolated from KwaZulu-Natal, South Africa and those isolated from Europe, Asia and North America, as well as those isolated from bat SARS COV, MERS-CoV, MHV and IBV. Thus, depicting the spread of the virus is intercontinental and might have evolved from other coronaviruses. The results also indicate the phytocannabinoids of C. sativa infusion as potential therapies against COVID-19 as depicted by their ability to molecularly interact with codon mRNAs of proteins implicated in the replication, translation, assembly, and release of SARS-CoV-2.”

https://www.frontiersin.org/articles/10.3389/fphar.2021.736511/full

Cannabinoid receptor 1 expression is higher in muscle of old vs. young males, and increases upon resistance exercise in older adults

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Scientific Reports“Aged skeletal muscle undergoes metabolic and structural alterations eventually resulting in a loss of muscle strength and mass, i.e. age-related sarcopenia. Therefore, novel targets for muscle growth purposes in elderly are needed.

Here, we explored the role of the cannabinoid system in muscle plasticity through the expression of muscle cannabinoid receptors (CBs) in young and old humans.

The CB1 expression was higher (+ 25%; p = 0.04) in muscle of old (≥ 65 years) vs. young adults (20-27 years), whereas CB2 was not differently expressed. Furthermore, resistance exercise tended to increase the CB1 (+ 11%; p = 0.055) and CB2 (+ 37%; p = 0.066) expression in muscle of older adults. Interestingly, increases in the expression of CB2 following resistance exercise positively correlated with changes in key mechanisms of muscle homeostasis, such as catabolism (FOXO3a) and regenerative capacity (Pax7, MyoD).

This study for the first time shows that CB1 is differentially expressed with aging and that changes in CB2 expression upon resistance exercise training correlate with changes in mediators that play a central role in muscle plasticity.

These data confirm earlier work in cells and mice showing that the cannabinoid system might orchestrate muscle growth, which is an incentive to further explore CB-based strategies that might counteract sarcopenia.”

https://pubmed.ncbi.nlm.nih.gov/34526596/

“In conclusion, cell culture and murine experiments suggested that CBs can be a promising target to treat cachexia and sarcopenia through modulation of the metabolism and muscle regenerative capacity. These data imply that CB modulation might be a promising tool to combat muscle degeneration. ”

https://www.nature.com/articles/s41598-021-97859-3

The Endocannabinoid System: A Potential Target for the Treatment of Various Diseases

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ijms-logo“The Endocannabinoid System (ECS) is primarily responsible for maintaining homeostasis, a balance in internal environment (temperature, mood, and immune system) and energy input and output in living, biological systems.

In addition to regulating physiological processes, the ECS directly influences anxiety, feeding behaviour/appetite, emotional behaviour, depression, nervous functions, neurogenesis, neuroprotection, reward, cognition, learning, memory, pain sensation, fertility, pregnancy, and pre-and post-natal development.

The ECS is also involved in several pathophysiological diseases such as cancer, cardiovascular diseases, and neurodegenerative diseases. In recent years, genetic and pharmacological manipulation of the ECS has gained significant interest in medicine, research, and drug discovery and development.

The distribution of the components of the ECS system throughout the body, and the physiological/pathophysiological role of the ECS-signalling pathways in many diseases, all offer promising opportunities for the development of novel cannabinergic, cannabimimetic, and cannabinoid-based therapeutic drugs that genetically or pharmacologically modulate the ECS via inhibition of metabolic pathways and/or agonism or antagonism of the receptors of the ECS. This modulation results in the differential expression/activity of the components of the ECS that may be beneficial in the treatment of a number of diseases.

This manuscript in-depth review will investigate the potential of the ECS in the treatment of various diseases, and to put forth the suggestion that many of these secondary metabolites of Cannabis sativa L. (hereafter referred to as “C. sativa L.” or “medical cannabis”), may also have potential as lead compounds in the development of cannabinoid-based pharmaceuticals for a variety of diseases.”

https://pubmed.ncbi.nlm.nih.gov/34502379/

https://www.mdpi.com/1422-0067/22/17/9472

“Cannabis sativa L. as a Natural Drug Meeting the Criteria of a Multitarget Approach to Treatment”

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7830475/

Cannabidiol reverses memory impairments and activates components of the Akt/GSK3β pathway in an experimental model of estrogen depletion

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Behavioural Brain Research“Clinical and preclinical evidence has indicated that estrogen depletion leads to memory impairments and increases the susceptibility to neural damage.

Here, we have sought to investigate the effects of Cannabidiol (CBD) a non-psychotomimetic compound from Cannabis sativa, on memory deficits induced by estrogen depletion in rats, and its underlying mechanisms.

Results revealed that ovariectomy impaired avoidance memory, and CBD was able to completely reverse estrogen depletion-induced memory impairment. Ovariectomy also reduced Akt/GSK3β pathway’s activation by decreasing the phosphorylation levels of Akt and GSK3β and Bcl2 levels, which were ameliorated by CBD.

The present results indicate that CBD leads to a functional recovery accompanied by the Akt/GSK3β survival pathway’s activation, supporting its potential as a treatment for estrogen decline-induced deterioration of neural functioning and maintenance.”

https://pubmed.ncbi.nlm.nih.gov/34450240/

“In the present study, we aimed to understand the possible neuroprotective effect of CBD against estrogen depletion-induced emotional memory deficits, using an animal model of ovariectomy-induced estrogen depletion. Once CBD and estradiol modulate a common pathway, we speculated whether CBD would be able to reverse the deleterious effect of estradiol decline observed in menopause. Results revealed that ovariectomy impaired avoidance memory, and CBD was able to completely reverse estrogen depletion-induced memory impairment.”

https://www.sciencedirect.com/science/article/abs/pii/S0166432821004435?via%3Dihub