[Research on antiproliferative effect of flavones isolated from Laggera pterodonta].
OBJECTIVE
To research the cytotoxicity and in vitro antiproliferative effect of the six flavone compounds extracted from Laggera pterodonta.


METHODS
The cytotoxicity on the normal cells and antiproliferative effect on tumor cells were tested by MTT assay, and then the preliminary structure-activity relationship was analysed. The phase distribution of the cell cycle and apoptosis rate were analyzed by flow cytometry.


RESULTS
The results of MTT assay showed 5,7,3',4'-tetramethoxy-3-hydroxyflavone and chrysosplenetin B inhibited growth of A549 and Hela cells significantly with a dose dependent mode, while exhibited low cytotoxicity to the two normal cells, Vero and EVC304. Both compounds contain ortho-phenolic methoxyl moietys in their structures. Flow cytometry analysis revealed that Hela cells treated with increasing quantities of chrysosplenetin B increased the percentage of cells in the G2/M phase, and Hela and A549 cells treated with increasing quantites of the 5,7,3',4'-tetramethoxy-3-hydroxyflavone and chrysosplenetin B increased the apoptosis rates.


CONCLUSIONS
The 5,7,3',4'-tetramethoxy-3-hydroxyflavone and chrysosplenetin B extracted from L. pterodonta showed high antiproliferative effect on cancer cells with low cytotoxicity on normal cells, and took the effects on A549 and Hela cells through the hold-up of the G2/M phase of the cell cycle and induction of the apoptosis.
Department of Anatomy, Medical college, Jinan University, Guangzhou 510632, China. dodoccs@sohu.com
Changshu
C
Cao
Bailian
B
Liu
Weizhai
W
Shen
Hui
H
Wang
Yaolan
Y
Li
D000818:Animals; D019659:Asteraceae / Q000737:chemistry*; D002460:Cell Line; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D002522:Chlorocebus aethiops; D047309:Flavones / Q000737:chemistry / Q000494:pharmacology*; D005419:Flavonoids / Q000494:pharmacology; D005434:Flow Cytometry; D006367:HeLa Cells; D006801:Humans; D014709:Vero Cells
D047309:Flavones; D005419:Flavonoids; C072749:chrysosplenetin B; C041477:3-hydroxyflavone