Cannabidiol Lowers Incidence of Diabetes in Non-Obese Diabetic Mice

Autoimmunity. 2006 Mar;39(2):143-51. doi: 10.1080/08916930500356674.

Abstract

Cannabidinoids are components of the Cannabis sativa (marijuana) plant that have been shown capable of suppressing inflammation and various aspects of cell-mediated immunity. Cannabidiol (CBD), a non-psychoactive cannabidinoid has been previously shown by us to suppress cell-mediated autoimmune joint destruction in an animal model of rheumatoid arthritis. We now report that CBD treatment significantly reduces the incidence of diabetes in NOD mice from an incidence of 86% in non-treated control mice to an incidence of 30% in CBD-treated mice. CBD treatment also resulted in the significant reduction of plasma levels of the pro-inflammatory cytokines, IFN-gamma and TNF-alpha. Th1-associated cytokine production of in vitro activated T-cells and peritoneal macrophages was also significantly reduced in CBD-treated mice, whereas production of the Th2-associated cytokines, IL-4 and IL-10, was increased when compared to untreated control mice. Histological examination of the pancreatic islets of CBD-treated mice revealed significantly reduced insulitis. Our results indicate that CBD can inhibit and delay destructive insulitis and inflammatory Th1-associated cytokine production in NOD mice resulting in a decreased incidence of diabetes possibly through an immunomodulatory mechanism shifting the immune response from Th1 to Th2 dominance.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cannabidiol / pharmacology*
  • Cytokines / biosynthesis
  • Diabetes Mellitus, Type 1 / immunology
  • Diabetes Mellitus, Type 1 / pathology
  • Diabetes Mellitus, Type 1 / prevention & control*
  • Female
  • Immunosuppressive Agents / pharmacology
  • Interferon-gamma / blood
  • Islets of Langerhans / drug effects
  • Islets of Langerhans / immunology
  • Islets of Langerhans / pathology
  • Macrophages, Peritoneal / drug effects
  • Macrophages, Peritoneal / immunology
  • Mice
  • Mice, Inbred NOD
  • Th1 Cells / drug effects
  • Th1 Cells / immunology
  • Th2 Cells / drug effects
  • Th2 Cells / immunology
  • Tumor Necrosis Factor-alpha / biosynthesis

Substances

  • Cytokines
  • Immunosuppressive Agents
  • Tumor Necrosis Factor-alpha
  • Cannabidiol
  • Interferon-gamma