Grape polyphenols and propolis mixture inhibits inflammatory mediator release from human leukocytes and reduces clinical scores in experimental arthritis

• Published in: Phytomedicine (Stuttgart) Vol. 21; no. 3; pp. 290 - 297
• Main Authors: Mossalayi, M.D., Rambert, J., Renouf, E., Micouleau, M., Mérillon, J.M.
• Format: Journal Article
• Language: English
• Published: Germany Elsevier GmbH 15.02.2014; Urban & Fischer Verlag
• Subjects: Animals; Anthocyanins; Anti-Inflammatory Agents - pharmacology; Anti-Inflammatory Agents - therapeutic use; Apitherapy; Arthritis; Arthritis, Experimental - drug therapy; Arthritis, Experimental - metabolism; Cachexia - drug therapy; Care and treatment; Drug Therapy, Combination; Female; Fruit; Grape polyphenols; Health aspects; Humans; Inflammation; Inflammation - drug therapy; Inflammation - metabolism; Inflammation Mediators - metabolism; Interferon-gamma - metabolism; Leukocytes - metabolism; Macrophage; Monokines - metabolism; Phytotherapy; Plant Extracts - pharmacology; Plant Extracts - therapeutic use; Polyphenols; Polyphenols - pharmacology; Polyphenols - therapeutic use; Propolis; Propolis - pharmacology; Propolis - therapeutic use; Rats; Rats, Inbred Strains; Rheumatoid arthritis; Transcriptome; Vitaceae; Vitis - chemistry; France; Anthocyanins; Inflammation; Propolis; Rheumatoid arthritis; Grape polyphenols; Macrophage
• ISSN: 0944-7113; 1618-095X
• DOI: 10.1016/j.phymed.2013.08.015

Polyphenols from red fruits and bee-derived propolis (PR) are bioactive natural products in various in vitro and in vivo models. The present study shows that hematotoxicity-free doses of grape polyphenols (GPE) and PR differentially decreased the secretion of pro-inflammatory cytokines from activated human peripheral blood leucocytes. While GPE inhibited the monocytes/macrophage response, propolis decreased both monokines and interferon γ (IFNγ) production. When used together, their distinct effects lead to the attenuation of all inflammatory mediators, as supported by a significant modulation of the transcriptomic profile of pro-inflammatory genes in human leukocytes. To enforce in vitro data, GPE+PR were tested for their ability to improve clinical scores and cachexia in chronic rat adjuvant-induced arthritis (AA). Extracts significantly reduced arthritis scores and cachexia, and this effect was more significant in animals receiving continuous low doses compared to those receiving five different high doses. Animals treated daily had significantly better clinical scores than corticoid-treated rats. Together, these findings indicate that the GPE+PR combination induces potent anti-inflammatory activity due to their complementary immune cell modulation.