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Medical Cannabis to Prevent/Treat COVID-19? High-CBD Sativa Extracts Modulate ACE2 Expression

cannabisnews by cannabisnews
June 7, 2021
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Medical Cannabis to Prevent/Treat COVID-19? High-CBD Sativa Extracts Modulate ACE2 Expression
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‘The Aging-US authors developed over 800 new C. sativa cultivars and hypothesized that high-CBD C. sativa extracts may be used to down-regulate ACE2 expression in target COVID-19 tissues.’

Aging-US published “In search of preventive strategies: novel high-CBD Cannabis sativa extracts modulate ACE2 expression in COVID-19 gateway tissues” which reported that Cannabis sativa, especially those high in the anti-inflammatory cannabinoid cannabidiol, has been found to alter gene expression and inflammation and harbor anti-cancer and anti-inflammatory properties.

Working under a Health Canada research license, the Aging-US authors developed over 800 new C. sativa cultivars and hypothesized that high-CBD C. sativa extracts may be used to down-regulate ACE2 expression in target COVID-19 tissues.

Using artificial 3D human models of oral, airway, and intestinal tissues, they identified 13 high-CBD C. sativa extracts that decrease ACE2 protein levels.

Some C. sativa extracts down-regulate serine protease TMPRSS2, another critical protein required for SARS-CoV-2 entry into host cells.

Cannabis sativa Extracts Modulate ACE2 Expression

Effects of novel C. sativa extracts on the levels of TMPRSS2 in the EpiAirway-FT (A) and EpiAirway (B) tissue models upon induction of inflammation by treatment with TNFα/IFNγ. Three tissue samples were used per treatment group. Protein extracts were prepared from each sample, and equal amounts of each sample in each group were pooled together. Each bar is an average (with SD) from three technical repeat measurements. * – p<0.05, Student’s t-test. Credit: © 2020 Wang et al.

While their most effective extracts require further large-scale validation, their study is important for future analyses of the effects of medical cannabis on COVID-19. The extracts of their most successful novel high-CBD C. sativa lines, pending further investigation, may become a useful and safe addition to the prevention/treatment of COVID-19 as an adjunct therapy.

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Dr. Olga Kovalchuk and Dr. Igor Kovalchuk said, “There is a global pandemic of the COVID-19 disease, which is caused by the zoonotic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).”

Similar to other respiratory pathogens, SARS-CoV-2 is transmitted through respiratory droplets from coughing and sneezing. However, aerosol transmission and close-contact transmission cannot be ruled out as means of disease spread.

An in-depth analysis of The Cancer Genome Atlas and Functional Annotation of The Mammalian Genome Cap Analysis of Gene Expression datasets revealed that ACE2 is expressed in oral mucosa and enriched in the epithelial cells of the tongue.

High levels of ACE2 expression in oral epithelial tissues suggests that the oral cavity could be highly susceptible to SARS-CoV-2 infection and thus an important target for prevention strategies.

Similarly, numerous studies have reported high levels of ACE2 in the lower respiratory tract; higher levels of ACE2 expression, such as those seen in smokers and patients with chronic obstructive pulmonary disease, are associated with higher COVID-19 predisposition and enhanced disease severity.

Using artificial 3D human tissue models, the authors show that high-CBD C. sativa extracts may down-regulate ACE2 expression in target COVID-19 tissues, suggesting an importance of these extracts in COVID-19 prevention.

The Kovalchuk/Kovalchuk Research Team concluded in their Aging-US Research Output, “While our most efficacious extracts require further validation through large-scale analyses, our study is important for future analyses of the effects of medical cannabis on COVID-19. Given the current dire and rapidly developing epidemiological situation, every possible therapeutic opportunity needs to be considered and researched.”

Reference: “In search of preventive strategies: novel high-CBD Cannabis sativa extracts modulate ACE2 expression in COVID-19 gateway tissues” by Bo Wang, Anna Kovalchuk, Dongping Li, Rocio Rodriguez-Juarez, Yaroslav Ilnytskyy, Igor Kovalchuk and Olga Kovalchuk, 22 November 2020, Aging-US.
DOI: 10.18632/aging.202225





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