Chalcone tetramers, lophirachalcone and alatachalcone, from Lophira alata as possible anti-tumor promoters.
Two chalcone tetramers were isolated as inhibitors of Epstein-Barr virus (EBV)-activation induced by a tumor promoter, teleocidin B-4, from a medicinal plant in tropical west Africa, Lophira alata (Ochnaceae). One of them was identified as lophirachalcone. The other, named alatachalcone, was new, and the structure was determined by spectral properties. Both compounds also showed potent inhibitory activities against teleocidin B-4-induced inflammation on mouse ear. In an initiation-promotion experiment on mouse skin, alatachalcone (16 nmol) significantly inhibited tumor promotion caused by 12-O-tetradecanoylphorbol-13-acetate (TPA, 1.6 nmol).
Murakami
A
A
Department of Food Science and Technology, Faculty of Agriculture, Kyoto University, Japan.
Tanaka
S
S
Ohigashi
H
H
Hirota
M
M
Irie
R
R
Takeda
N
N
Tatematsu
A
A
Koshimizu
K
K
D015127:9,10-Dimethyl-1,2-benzanthracene; D000818:Animals; D016588:Anticarcinogenic Agents / Q000302:isolation & purification* / Q000627:therapeutic use; D000998:Antiviral Agents / Q000302:isolation & purification / Q000494:pharmacology; D002599:Chalcone / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use; D047188:Chalcones; D005260:Female; D004854:Herpesvirus 4, Human / Q000187:drug effects; D007249:Inflammation / Q000139:chemically induced / Q000188:drug therapy; D007509:Irritants; D008235:Lyngbya Toxins; D046911:Macromolecular Substances; D051379:Mice; D008813:Mice, Inbred ICR; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D010936:Plant Extracts / Q000302:isolation & purification* / Q000627:therapeutic use; D010946:Plants, Medicinal / Q000737:chemistry; D012878:Skin Neoplasms / Q000139:chemically induced / Q000517:prevention & control
D016588:Anticarcinogenic Agents; D000998:Antiviral Agents; D047188:Chalcones; D007509:Irritants; D008235:Lyngbya Toxins; D046911:Macromolecular Substances; D010636:Phenols; D010936:Plant Extracts; C075561:lophirachalcone; C075560:alatachalcone; C022176:teleocidins; D015127:9,10-Dimethyl-1,2-benzanthracene; D002599:Chalcone