Biomedical research: Propolis Essay

Propolis is the focus of a large number of research projects.21 Some preliminary research findings (published in the biomedical literature), unneurotic with their limitations, are described below. Readers are reminded that the following information represents preliminary research and does not constitute medical advice. Readers are directed to their local physician or healthcare provider for medical advice.As an antimicrobialeditPreliminary scientific studies show some types of propolis have in vitro antibacterial22 and antifungal23 activity (with active constituents including flavonoids like galangin24 and hydroxycinnamic acids like caffeic acid25). In the absence of any in vivo or clinical studies however, it is not clear if this antimicrobial activity has any therapeutic relevance.As an emollientPreliminary in vivo studies with rats suggest propolis may be effective in treating the inflammatory component of skin burns.2627 Also, a clinical trial has shown Brazilian propolis skin c ream to be superior to silver sulfadiazine for the sermon of partial thickness burn wounds.28 Recent studies have raised concerns about the efficacy of silver sulfadiazine however, with suggestions it may actually mark off wound healing. Further clinical research is needed.As an immunomodulatorPropolis has been reported to exhibit both immunosuppressive and immunostimulant effects.2930 Further research is needed to establish if there is a practical application for these seemingly opposing pharmacological effects.As a treatment for allergiesThough claims have been made for the use of propolis in treating allergies, propolis can itself driving force severe allergic reactions if the user is sensitive to bees or bee products.31As an oral hygiene productPropolis has been the subject of recent dentistry research, and there is some in vivo and clinical evidence that propolis might protect against dental caries and other forms of oral disease, due to its antimicrobial properties.32333435 Propolis is also being investigated for its efficacy in the treatment of canker sores36 and in reducing the inflammation associated with canal debridement and endodontic procedures.As an antioxidantOne in vivo study has shown that propolis reduced the chances of cataracts in rat pups.38 Again however, in the absence of any clinical studies, it is not clear if this activity has any therapeutic relevance.In cancer treatment and cancer preventionIn in vitro tests, propolis induces cell cycle arrest, apoptosis and reduces expression of growth and transcription factors, including NF-B. Notably, caffeic acid phenethyl ester down-regulates the mdr-1 gene, considered responsible for the resistance of cancer cells to chemotherapeutic agents.39 In in vivo studies with mice, propolis inhibits 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone-induced tumorigenesis.40 Again however, in the absence of any clinical studies, it is not clear if this activity has any therapeutic relevance.