High-CBD cannabis extract suppressed human immune cell activity in the lab
A CBD-rich cannabis extract inhibited human T cell proliferation and function without killing the cells, working through CB2 and TRPV1 receptors.
Quick Facts
What This Study Found
A cannabis extract with 14% CBD and 0.2% THC inhibited T lymphocyte proliferation in a dose-dependent manner without causing cell death. The extract suppressed T cell activation markers (CD25), degranulation, and production of IL-2 and IFN-gamma. Effects were mediated through CB2 and TRPV1 receptors and AP-1/NFAT transcription pathways.
Key Numbers
14% CBD, 0.2% THC concentration in the extract. Effects were dose-dependent and reversible with CB2 antagonist (SR144528) and TRPV1 antagonist (A78416B).
How They Did This
In vitro study using primary human lymphocytes and Jurkat reporter cell lines. Tested a high-CBD, low-THC cannabis extract against pure CBD, measuring proliferation, activation markers, cytokine production, and receptor involvement.
Why This Research Matters
Understanding how cannabis extracts modulate the immune system could inform therapeutic approaches for autoimmune and inflammatory conditions.
The Bigger Picture
The finding that the extract's immunosuppressive effects were mostly attributable to CBD suggests CBD-dominant preparations could have therapeutic potential for conditions involving overactive T cell responses.
What This Study Doesn't Tell Us
In vitro study using isolated cells. Immune system behavior in living organisms involves complex interactions not captured in cell culture. Effective concentrations may not be achievable in the body.
Questions This Raises
- ?Would these immunosuppressive effects translate to reduced inflammation in living organisms?
- ?Could CBD-rich extracts serve as adjunct therapy for autoimmune conditions?
Trust & Context
- Key Stat:
- Immunosuppressive effects mostly due to CBD, mediated by CB2 and TRPV1
- Evidence Grade:
- Well-designed in vitro study with mechanism identification, but no in vivo confirmation.
- Study Age:
- Published in 2022.
- Original Title:
- Immunosuppressive activity of non-psychoactive Cannabis sativa L. extract on the function of human T lymphocytes.
- Published In:
- International immunopharmacology, 103, 108448 (2022)
- Authors:
- Devi, Seema, Zimmermann-Klemd, Amy M, Fiebich, Bernd L, Heinrich, Michael, Gründemann, Carsten, Steinberger, Peter, Kowarschik, Stefanie, Huber, Roman
- Database ID:
- RTHC-03803
Evidence Hierarchy
Tests effects in animals (usually mice or rats), not humans.
What do these levels mean? →Frequently Asked Questions
Did the cannabis extract damage the immune cells?
No. The extract inhibited T cell proliferation and function without causing apoptosis (cell death), necrosis, or DNA damage. The cells were suppressed but not harmed.
Was the effect from CBD or other compounds in the extract?
Comparison with pure CBD suggested the immunosuppressive effect was mostly due to CBD, though other compounds in the full extract may contribute.
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Cite This Study
https://rethinkthc.com/research/RTHC-03803APA
Devi, Seema; Zimmermann-Klemd, Amy M; Fiebich, Bernd L; Heinrich, Michael; Gründemann, Carsten; Steinberger, Peter; Kowarschik, Stefanie; Huber, Roman. (2022). Immunosuppressive activity of non-psychoactive Cannabis sativa L. extract on the function of human T lymphocytes.. International immunopharmacology, 103, 108448. https://doi.org/10.1016/j.intimp.2021.108448
MLA
Devi, Seema, et al. "Immunosuppressive activity of non-psychoactive Cannabis sativa L. extract on the function of human T lymphocytes.." International immunopharmacology, 2022. https://doi.org/10.1016/j.intimp.2021.108448
RethinkTHC
RethinkTHC Research Database. "Immunosuppressive activity of non-psychoactive Cannabis sati..." RTHC-03803. Retrieved from https://rethinkthc.com/research/devi-2022-immunosuppressive-activity-of-nonpsychoactive
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.