Abstract:
:Caffeic acid esters, one of the components of propolis, are known to show a variety of biological effects such as anti-tumor, anti-oxidant, and anti-inflammatory activities. Although, the anti-inflammatory activities of caffeic acid esters have been studied by analyzing their structure, the detailed mechanisms of their activities remain unclear. Thus, in this study, we examined the function of the ester functional group and the alkyl side chain (alcoholic part) and transformed caffeic acid to several derivatives. The inhibitory effect of these derivatives on NO production in murine macrophage RAW264.7 cells was dependent on the length and size of the alkyl moiety, and undecyl caffeate was the most potent inhibitor of NO production. In addition, individual experiments using undecanol, caffeic acid, undecanol plus caffeic acid, and undecyl caffeate showed that the connection between caffeic acid and the alkyl chain is critical for activity. Amide and ketone derivatives showed that not only the ester functional group but also the amide and ketone functional groups exhibit an inhibitory effect on NO production.
journal_name
Bioorg Med Chemjournal_title
Bioorganic & medicinal chemistryauthors
Uwai K,Osanai Y,Imaizumi T,Kanno S,Takeshita M,Ishikawa Mdoi
10.1016/j.bmc.2008.07.006subject
Has Abstractpub_date
2008-08-15 00:00:00pages
7795-803issue
16eissn
0968-0896issn
1464-3391pii
S0968-0896(08)00603-2journal_volume
16pub_type
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