An avocado constituent, persenone A, suppresses expression of inducible forms of nitric oxide synthase and cyclooxygenase in macrophages, and hydrogen peroxide generation in mouse skin.
We investigated the suppressive effects of an avocado constituent, persenone A, on lipopolysaccharide- and interferon-y-induced inducible nitric oxide synthase (iNOS) and cyclooxygenase (COX-2) in a mouse macrophage cell line RAW 264.7. Persenone A at concentration of 20 microM almost completely suppressed both iNOS and COX-2 protein expression. In mouse skin, double treatments with persenone A (810 nmol) significantly suppressed double 12-O-tetradecanoylphorbol-13-acetate (TPA, 8.1 nmol) application-induced hydrogen peroxide (H2O2) generation. Treatment with persenone A before the second TPA treatment was sufficient to inhibit H2O2 generation, while the first treatment was not. This study thus suggests that persenone A is a possible agent to prevent inflammation-associated diseases including cancer.
Kim
O K
OK
Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Japan.
Murakami
A
A
Takahashi
D
D
Nakamura
Y
Y
Torikai
K
K
Kim
H W
HW
Ohigashi
H
H
D000818:Animals; D015153:Blotting, Western; D002273:Carcinogens / Q000633:toxicity; D004790:Enzyme Induction; D004952:Esters / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D005233:Fatty Alcohols / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D005260:Female; D020868:Gene Silencing / Q000187:drug effects; D006861:Hydrogen Peroxide / Q000378:metabolism*; D019770:Lauraceae / Q000737:chemistry*; D008264:Macrophages / Q000187:drug effects* / Q000201:enzymology; D051379:Mice; D008813:Mice, Inbred ICR; D019001:Nitric Oxide Synthase / Q000235:genetics / Q000378:metabolism*; D052247:Nitric Oxide Synthase Type II; D011451:Prostaglandin-Endoperoxide Synthases / Q000235:genetics / Q000378:metabolism*; D012867:Skin / Q000187:drug effects* / Q000378:metabolism; D013755:Tetradecanoylphorbol Acetate / Q000633:toxicity
D002273:Carcinogens; D004952:Esters; D005233:Fatty Alcohols; C412488:persenone A; D006861:Hydrogen Peroxide; D019001:Nitric Oxide Synthase; D052247:Nitric Oxide Synthase Type II; C496317:Nos2 protein, mouse; D011451:Prostaglandin-Endoperoxide Synthases; D013755:Tetradecanoylphorbol Acetate