Antioxidant activity, cytotoxicity, and DNA information of Glossogyne tenuifolia.
This study investigates the antioxidant activity and cytotoxicity of Glossogyne tenuifolia extract on various cancer cell lines. The 5.8s DNA of G. tenuifolia was isolated, and the species of this plant was confirmed by NCBI's DNA database. G. tenuifolia was then extracted with ethanol and separated into several fractions using the partition procedure with water, n-butanol, and ethyl acetate (EA). Among these, the EA fraction most significantly affected the activity of DPPH(*) and superoxide anion scavenging. Additionally, only the EA fraction exhibited cytotoxicity on breast cancer cells (MCF-7 and MDA-MB-231) and liver cancer cells (Hep G2 and Hep 3B). Next, the EA fraction was further separated by column chromatography, and 15 fractions were obtained. Three effective components were isolated and identified separately from the active fractions: oleanolic acid (OA) from fraction 6, luteolin from fractions 8-10, and luteolin-7-glucoside from fraction 12. The test of these three compounds on scavenging activity of DPPH(*) and superoxide anion indicates that luteolin had the highest antioxidant activity, whereas the effect of OA was negligible. Additionally, a synergistic effect between luteolin and luteolin-7-glucoside was observed. Kick-out experiments showed that the activities were vanished or decreased. Especially on MDA-MB-231 and MCF-7 cells, the cytotoxicity completely disappeared when luteolin was eliminated from fractions 8-10. These findings demonstrate that luteolin plays a crucial role in the inhibition of the growth of hepatoma cancer cell lines. Fraction 3, which did not contain luteolin, luteolin-7-glucoside, and oleanolic acid, had cytotoxicity on MDA-MB-231, MCF-7, Hep G2, Hep 3B, and A549, which implies that this fraction contained some other effective ingredients and requires further study. The investigation is currently underway in our laboratory.
Hsu
Hsia-Fen
HF
Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung, Taiwan.
Houng
Jer-Yiing
JY
Chang
Chao-Lin
CL
Wu
Chin-Chung
CC
Chang
Fang-Rong
FR
Wu
Yang-Chang
YC
D000970:Antineoplastic Agents / Q000032:analysis; D000975:Antioxidants / Q000032:analysis*; D019659:Asteraceae / Q000737:chemistry* / Q000235:genetics*; D001483:Base Sequence; D016923:Cell Death / Q000187:drug effects*; D002455:Cell Division / Q000187:drug effects; D045744:Cell Line, Tumor; D018744:DNA, Plant / Q000737:chemistry / Q000302:isolation & purification; D016166:Free Radical Scavengers / Q000032:analysis; D006801:Humans; D008969:Molecular Sequence Data; D009369:Neoplasms / Q000473:pathology; D010636:Phenols / Q000032:analysis; D010936:Plant Extracts / Q000494:pharmacology*; D012340:RNA, Ribosomal, 5.8S / Q000235:genetics
D000970:Antineoplastic Agents; D000975:Antioxidants; D018744:DNA, Plant; D016166:Free Radical Scavengers; D010636:Phenols; D010936:Plant Extracts; D012340:RNA, Ribosomal, 5.8S