Saturday, September 29, 2007

Propolis Component Demonstrates Anti-Allergic Effect

Evaluation of Anti-Allergic Properties of Caffeic Acid Phenethyl Ester in a Murine Model of Systemic Anaphylaxis
Toxicology and Applied Pharmacology, August 17, 2007

Abstract: Caffeic acid phenethyl ester (CAPE) is an active component of honeybee propolis extracts. It has several positive effects, including anti-inflammatory, anti-oxidation, anti-cancer, anti-bacterial, anti-viral, anti-fungal, and immunomodulatory effects. In particular, the suppressive effect of NF-κB may disrupt a component of allergic induction.

The principal objective of this experimental study was to evaluate the effects of CAPE on the active systemic anaphylaxis induced by ovalbumin (OVA) challenge in mice.

…After challenges, all of the sham-treated mice developed anaphylactic symptoms, increased plasma levels of histamine and OVA-specific IgE, marked vascular leakage, NF-κB activation, platelet-activating factor (PAF) production, and histological changes including pulmonary edema and hemorrhage in the renal medullae within 20 min.

By way of contrast, a reduction in the plasma levels of histamine and OVA-specific IgE and an inhibition of NF-κB activation and PAF release were observed in the CAPE-treated mice. In addition, a significant prevention of hemoconcentration and OVA-induced pathological changes were noted.

These results indicate that CAPE demonstrates an anti-allergic effect, which may be the result of its protective effects against IgE-mediated allergy.

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