PMID- 15738623 OWN - NLM STAT- MEDLINE DCOM- 20050712 LR - 20190724 IS - 0031-6903 (Print) IS - 0031-6903 (Linking) VI - 125 IP - 3 DP - 2005 Mar TI - [Chemical study of citrus plants in the search for cancer chemopreventive agents]. PG - 231-54 AB - The constituents of Citrus plants were investigated to develop useful agents that are effective in cancer chemoprevention. We examined the roots and bark of the roots of various Citrus plants, resulting in the isolation of many novel compounds. Their structures were determined using spectroscopic methods, especially 2D-NMR spectra. The following new compounds of constituents were found: dimeric coumarins, dimeric acridone alkaloids, and acridone-coumarin dimers. Auraptene and nobiletin are known as useful constituents of the peel of Citrus plants for cancer chemoprevention. However, we found that 3,5,6,7,8,3',4'-heptamethoxyflavone (HPT) has both antitumor promotion and initiation activities and is more effective than auraptene and nobiletin. We synthesized pentaallyl quercetin (QPA), a useful antitumor compound that has the additional effects of a P-glycoprotein (P-gp) inhibitor. The inhibitory effects of QPA on P-gp were more effective than those of the typical P-gp inhibitors cyclosporin A and verapamil. Both HPT and QPA have antitumor promotion activity and are potential candidates for effective multidrug resistance agents in cancer chemotherapy. FAU - Ju-Ichi, Motoharu AU - Ju-Ichi M AD - School of Pharmaceutical Sciences, Mukogawa Women's University, Nishinomiya 663-8179, Japan. mjuichi@mwu.mukogawa-u.ac.jp LA - jpn PT - Journal Article PT - Review PL - Japan TA - Yakugaku Zasshi JT - Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan JID - 0413613 RN - 0 (ATP Binding Cassette Transporter, Subfamily B, Member 1) RN - 0 (Acridines) RN - 0 (Acridones) RN - 0 (Antineoplastic Agents) RN - 0 (Coumarins) RN - 0 (Flavonoids) RN - 1178-24-1 (3,3',4',5,6,7,8-heptamethoxyflavone) RN - 6BK306GUQA (acridone) RN - 9IKM0I5T1E (Quercetin) RN - F79I1ZEL2E (aurapten) SB - IM MH - ATP Binding Cassette Transporter, Subfamily B, Member 1/antagonists & inhibitors MH - Acridines/*isolation & purification/pharmacology MH - Acridones MH - Animals MH - Antineoplastic Agents/*isolation & purification/pharmacology MH - Citrus/*chemistry MH - Coumarins/*isolation & purification/pharmacology MH - Flavonoids/*isolation & purification/pharmacology MH - Humans MH - Nuclear Magnetic Resonance, Biomolecular/methods MH - Quercetin/chemical synthesis/pharmacology MH - Structure-Activity Relationship RF - 62 EDAT- 2005/03/02 09:00 MHDA- 2005/07/13 09:00 CRDT- 2005/03/02 09:00 PHST- 2005/03/02 09:00 [pubmed] PHST- 2005/07/13 09:00 [medline] PHST- 2005/03/02 09:00 [entrez] AID - JST.JSTAGE/yakushi/125.231 [pii] AID - 10.1248/yakushi.125.231 [doi] PST - ppublish SO - Yakugaku Zasshi. 2005 Mar;125(3):231-54. doi: 10.1248/yakushi.125.231.