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Abstract Title:

Cannabidiol (CBD) induces functional Tregs in response to low-level T cell activation.

Abstract Source:

Cell Immunol. 2016 Nov 9. Epub 2016 Aug 9. PMID: 27865421

Abstract Author(s):

Saphala Dhital, John V Stokes, Nogi Park, Keun Seok Seo, Barbara L F Kaplan

Article Affiliation:

Saphala Dhital

Abstract:

Many effects of the non-psychoactive cannabinoid, cannabidiol (CBD), have been described in immune responses induced by strong immunological stimuli. It has also been shown that CBD enhances IL-2 production in response to low-level T cell stimulation. Since IL-2, in combination with TGF-β1, are critical for Treg induction, we hypothesized that CBD would induce CD4(+)CD25(+)FOXP3(+) Tregs in response to low-level stimulation. Low-level T cell stimulation conditions were established based on minimal CD25 expression in CD4(+) cells using suboptimal PMA/Io (4nM/0.05μM, S/o), ultrasuboptimal PMA/Io (1nM/0.0125μM, Us/o) or soluble anti-CD3/28 (400-800ng each, s3/28). CBD increased CD25(+)FOXP3(+) cells from CD4(+), CD4(+)CD25(+), and CD4(+)CD25(-) T cells, as well as in CD4(+) T cells derived from FOXP3-GFP mice. Most importantly, the Us/o+CBD-induced CD4(+)CD25(+) Tregs robustly suppressed responder T cell proliferation, demonstrating that the mechanism by which CBD is immunosuppressive under low-level T cell stimulation involves induction of functional Tregs.

Study Type : In Vitro Study
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