Growing evidence shows cannabinoids alter immune function by changing the expression of microRNAs, short RNA molecules that regulate gene activity in immune cells.
Immunology researchers, people interested in how cannabis affects the immune system, those following cannabinoid therapeutic development
MicroRNA changes drive many of the immune effects of cannabinoids
What the researchers found
Cannabinoid exposure changes the expression of specific microRNAs in various immune cell types, and these miRNA changes appear to drive many of the observed anti-inflammatory and immunomodulatory effects of cannabinoids acting through CB1 and CB2 receptors.
Why it matters
Understanding the molecular mechanisms behind cannabinoid immune effects could lead to more targeted anti-inflammatory therapies that harness specific pathways without the psychoactive effects of whole-plant cannabis.
The numbers in context
CB1 and CB2 receptors expressed in central and peripheral tissues; miRNAs are short non-coding single-stranded RNA molecules
How the study worked
Review article summarizing studies from the past decade on miRNA expression changes following cannabinoid receptor modulation in immune system components.
What this study cannot tell us
Most studies used isolated cell systems or animal models. The clinical relevance of miRNA changes from typical cannabis exposure levels in humans is uncertain. Different cannabinoids may affect different miRNA profiles.
How to read the evidence
Review of primarily preclinical studies on molecular mechanisms
When this study was published
Published in 2021. MicroRNA research in cannabinoid immunology is a rapidly evolving field.
The bigger picture
The miRNA connection provides a molecular explanation for how cannabinoids can have such wide-ranging effects on the immune system, potentially opening new therapeutic avenues for autoimmune and inflammatory conditions.
Questions still open
- Could specific miRNA targets be used to develop anti-inflammatory drugs inspired by cannabinoid pathways? Do different cannabinoids (THC vs CBD) produce distinct miRNA signatures?
Common questions
How do cannabinoids affect the immune system?
What are microRNAs?
Read the original research
Cannabinoid-induced changes in the immune system: The role of microRNAs.
International immunopharmacology, 98, 107832
Citation
Bhatt, Hirva K; Song, Dana; Musgrave, Gyen; Rao, P S S. (2021). Cannabinoid-induced changes in the immune system: The role of microRNAs.. International immunopharmacology, 98, 107832. https://doi.org/10.1016/j.intimp.2021.107832
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