Chemical structure of 8-prenylnaringenin, a prenylated flavanone found in hops
Prenylated flavonoids or prenylflavonoids are a sub-class of flavonoids. They are widely distributed throughout the plant kingdom. Some are known to have phytoestrogenic or antioxidant[1] properties. They are given in the list of adaptogens in herbalism. Chemically they have a prenyl group attached to their flavonoid backbone. It is usually assumed that the addition of hydrophobic prenyl groups facilitate attachment to cell membranes. Prenylation may increase the potential activity of its original flavonoid.[2]
6-Prenylnaringenin, 6-geranylnaringenin, 8-prenylnaringenin and isoxanthohumol can be found in hops and beer.[5][6] Of the prenylflavonoids, 8-prenylnaringenin is the most potent phytoestrogen known.
6,8-Diprenyleriodictyol, dorsmanin C and dorsmanin F can be found in Dorstenia mannii.[1]
Epimedium wushanense contains a number of flavanoids. 37 compounds were characterized from the underground and aerial parts of the plant. Among them, 28 compounds were prenylflavonoids. The predominant prenylated flavonoid, epimedin C,[8] ranged from 1.4 to 5.1% in aerial parts and 1.0 to 2.8% in underground parts.[9]
A number of bio-active chemicals have been reported from Millettia pachycarpa including several prenylflavonoids.[13][14] Several chemical analyses have yielded a number of novel prenylated isoflavones including erysenegalensein E, euchrenone b10, isoerysenegalensein E, 6,8-diprenylorobol, furowanin A and B, millewanins-F, G and H, warangalone, and auriculasin from the leaves.[15][16]
↑Tanaka, Mitsuharu; Tahara, Satoshi (1997). "Fad-dependent epoxidase as a key enzyme in fungal metabolism of prenylated flavonoids". Phytochemistry46 (3): 433–9. doi:10.1016/S0031-9422(97)00322-1.
↑Miranda, C.L.; Stevens, J.F.; Helmrich, A.; Henderson, M.C.; Rodriguez, R.J.; Yang, Y.-H.; Deinzer, M.L.; Barnes, D.W. et al. (1999). "Antiproliferative and cytotoxic effects of prenylated flavonoids from hops (Humulus lupulus) in human cancer cell lines". Food and Chemical Toxicology37 (4): 271–85. doi:10.1016/S0278-6915(99)00019-8. PMID10418944.
↑Stevens, Jan F; Page, Jonathan E (2004). "Xanthohumol and related prenylflavonoids from hops and beer: To your good health!". Phytochemistry65 (10): 1317–30. doi:10.1016/j.phytochem.2004.04.025. PMID15231405.
↑Dhooghe, Liene; Naessens, Tania; Heyerick, Arne; De Keukeleire, Denis; Vlietinck, Arnold J.; Pieters, Luc; Apers, Sandra (2010). "Quantification of xanthohumol, isoxanthohumol, 8-prenylnaringenin, and 6-prenylnaringenin in hop extracts and derived capsules using secondary standards". Talanta83 (2): 448–56. doi:10.1016/j.talanta.2010.09.041. PMID21111159.
↑Li, Hui-Fang; Guan, Xiang-yu; Ye, Min; Xiang, Cheng; Lin, Chang-hu; Sun, Chao; Guo, De-an (2011). "Qualitative and quantitative analyses of Epimedium wushanense by high-performance liquid chromatography coupled with diode array detection and electrospray ionization tandem mass spectrometry". Journal of Separation Science34 (12): 1437–46. doi:10.1002/jssc.201000899. PMID21560245.
↑Jayasinghe, U.L.B.; Samarakoon, T.B.; Kumarihamy, B.M.M.; Hara, N.; Fujimoto, Y. (2008). "Four new prenylated flavonoids and xanthones from the root bark of Artocarpus nobilis". Fitoterapia79 (1): 37–41. doi:10.1016/j.fitote.2007.07.014. PMID17855020.
↑Barrett, M. L.; Scutt, A. M.; Evans, F. J. (1986). "Cannflavin A and B, prenylated flavones from Cannabis sativa L". Experientia42 (4): 452–453. doi:10.1007/BF02118655. PMID3754224.
↑Singhal, Ashok K.; Sharma, Ram P.; Thyagarajan, Gopalakrishna; Herz, Werner; Govindan, Serengolam V. (1980). "New prenylated isoflavones and a prenylated dihydroflavonol from Millettia pachycarpa". Phytochemistry19 (5): 929–34. doi:10.1016/0031-9422(80)85140-5.
↑Ye, Haoyu; Chen, Lijuan; Li, Yanfang; Peng, Aihua; Fu, Afu; Song, Hang; Tang, Minghai; Luo, Houding et al. (2008). "Preparative isolation and purification of three rotenoids and one isoflavone from the seeds of Millettia pachycarpa Benth by high-speed counter-current chromatography". Journal of Chromatography A1178 (1–2): 101–7. doi:10.1016/j.chroma.2007.11.060. PMID18082754.
↑Okamoto, Yoshinori; Suzuki, Atsushi; Ueda, Koji; Ito, Chihiro; Itoigawa, Masataka; Furukawa, Hiroshi; Nishihara, Tsutomu; Kojima, Nakao (2006). "Anti-Estrogenic Activity of Prenylated Isoflavones from Millettia pachycarpa: Implications for Pharmacophores and Unique Mechanisms". Journal of Health Science52 (2): 186–91. doi:10.1248/jhs.52.186.