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Abstract Title:

Suppressive effects of cannabidiol on antigen-specific antibody production and functional activity of splenocytes in ovalbumin-sensitized BALB/c mice.

Abstract Source:

Int Immunopharmacol. 2007 Jun ;7(6):773-80. Epub 2007 Feb 15. PMID: 17466911

Abstract Author(s):

Tong-Rong Jan, Shu-Ting Su, Hsin-Ying Wu, Mei-Hsiu Liao

Article Affiliation:

Tong-Rong Jan

Abstract:

Cannabidiol (CBD) and cannabis-based medicines are potential therapeutic agents. Because the immune system has been widely demonstrated to be affected by psychoactive cannabinoids, such as Delta(9)-tetrahydrocannabinol, the objective of the present studies is to investigate the immunomodulatory effect of CBD, the major non-psychoactive cannabinoid in marijuana. BALB/c mice were intraperitoneally administered with a single dose of CBD (5-20 mg/kg) prior to ovalbumin (OVA) sensitization, and the serum production of antigen-specific antibodies was measured 7 days post OVA sensitization. The serum level of OVA-specific IgM was significantly attenuated by a high dose of CBD (20 mg/kg), and OVA-specific IgG(1) and IgG(2a) by all 3 doses of CBD. Concordantly, splenocytes of mice administered with CBD (5 or 20 mg/kg) produced less IL-2, IL-4 and IFN-gamma than those of vehicle-treated controls, upon ex vivo stimulation with phorbol ester plus calcium ionophore. Likewise, T-cell mitogen (concanavalin A)-induced proliferation of splenocytes was also markedly suppressed in mice administered with CBD. Furthermore, the observed ex vivo effects of CBD on cytokine production and T-cell proliferation were confirmed in splenocytes directly exposed to CBD (1-8 microM) in vitro, indicating a direct effect by CBD. Taken together, the results demonstrated that CBD markedly suppressed antigen-specific antibody production in OVA-sensitized mice, and suggest that CBD-mediated suppression of humoral immunity could be mediated by the impaired functions of splenocytes.

Study Type : Animal Study

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