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Biol Pharm Bull. 2017;40(2):161-168. doi: 10.1248/bpb.b16-00644.

Inhibition of Neutrophil Adhesion and Antimicrobial Activity by Diluted Hydrosol Prepared from Rosa damascena.

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Teikyo University Institute of Medical Mycology.

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Hydrosol prepared from the flowers of Rosa damascena (rose water) has been traditionally used for various health-related issues, including skin troubles such as erythema, itchiness, swelling. For the care of these skin troubles caused by microbial infection, both antimicrobial and antiinflammatory effects are required. Here, we investigated the effects of rose water on the growth of Candida albicans and methicillin-resistant Staphylococcus aureus (MRSA), which cause skin infections, and on the function of neutrophils, which play a major role in the regulation of inflammatory reactions. To assess its modulatory effects on neutrophils, the effects of rose water against neutrophil adhesion response were evaluated. Rose water inhibited mycelial growth of C. albicans at a concentration of ca. 2.2%, and reduced viability of MRSA within 1 h. Rose water suppressed neutrophil activation induced by lipopolysaccharide (LPS), tumor necrosis factor alpha (TNF-α), and N-formyl-Met-Leu-Phe (fMLP) at 5-15%. It also reduced the LPS- and TNF-α-induced cell surface expression of the adhesion-related molecule, cluster of differentiation (CD) 11b, but did not affect the migratory capacity of neutrophils with or without chemoattractant. These results suggest that rose water may reduce the pathogenicity of microbes, and attenuate neutrophil stimulation, which is involved in inflammatory responses. These findings suggest that rose water has a potential effect to inhibit skin inflammation caused by microbes.

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