title: Inhibitory effects of persimmon (Diospyros kaki) extract and related polyphenol compounds on growth of human lymphoid leukemia cells.
abstract: We have investigated the effects of persimmon (Diospyros kaki) extract (PS) and related polyphenol compounds such as catechin (C), epicatechin (EC), epicatechingallate (ECG), epigallocatechin (EGC), and epigallocatechingallate (EGCG) on the growth of human lymphoid leukemia Molt 4B cells. We found that PS, ECG, EGC, and EGCG strongly inhibited the growth of the cells in a dose-dependent manner, while C and EC inhibited the growth of the cells only moderately. Ornithine decarboxylase (ODC), a rate-limiting enzyme of polyamine biosynthesis, was inhibited by 10-20% by these polyphenol compounds. The morphology of the Molt 4B cells indicated severe damage 3 days after treatment with PS, ECG, EGC, and EGCG. Irregular shape of the cells and DNA fragmentation were observed in PS, ECG, EGC, or EGCG-treated cells. These results suggest that PS, ECG, EGC, and EGCG induce apoptosis (programmed cell death) of Molt 4B cells.
authors.affiliation: Faculty of Bioresources, Mie University, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Achiwa
authors.forename: H
authors.initials: H
authors.lastname: Hibasami
authors.forename: H
authors.initials: H
authors.lastname: Katsuzaki
authors.forename: K
authors.initials: K
authors.lastname: Imai
authors.forename: T
authors.initials: T
authors.lastname: Komiya
mesh_terms: D000970:Antineoplastic Agents / Q000737:chemistry / Q000494:pharmacology; D017209:Apoptosis / Q000187:drug effects; D002392:Catechin / Q000031:analogs & derivatives / Q000494:pharmacology; D002455:Cell Division / Q000187:drug effects; D053938:DNA Fragmentation / Q000187:drug effects; D005419:Flavonoids; D005638:Fruit / Q000737:chemistry*; D006801:Humans; D007945:Leukemia, Lymphoid / Q000188:drug therapy* / Q000473:pathology; D008856:Microscopy, Fluorescence; D009955:Ornithine Decarboxylase / Q000187:drug effects / Q000378:metabolism; D010636:Phenols / Q000737:chemistry / Q000494:pharmacology*; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D011108:Polymers / Q000737:chemistry / Q000494:pharmacology*; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D005419:Flavonoids; D010636:Phenols; D010936:Plant Extracts; D011108:Polymers; D002392:Catechin; C045651:epigallocatechin gallate; D009955:Ornithine Decarboxylase