Naturally occurring chlorophyll derivatives inhibit aflatoxin B1-DNA adduct formation in hepatoma cells

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Taipei Medical University Institutional Repository > 營養學院 > 保健營養學系暨研究所 > 期刊論文 > Item 987654321/1285

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題名:	Naturally occurring chlorophyll derivatives inhibit aflatoxin B1-DNA adduct formation in hepatoma cells
作者:	胡雪萍;陳玉華 Hsu CY;Chen HH;Chao PY;Chen CM;Shieh LL;Hu SP
貢獻者:	保健營養學系
日期:	2008
上傳時間:	2009-08-16 21:46:01 (UTC+8)
摘要:	The inhibitory effects of four chlorophyll derivatives (chlorophyllide [Chlide] a and b and pheophorbide [Pho] a and b) on aflatoxin B1 (AFB1)-DNA adduct formation, and on the modulation of hepatic glutathione S-transferase (GST) were evaluated in murine hepatoma (Hepa-1) cells. Enzyme-linked immunosorbent assay showed that pretreatment with Chlide or Pho significantly reduced the formation of AFB1-DNA adducts, and that Pho was the most potent inhibitor. However, wash-out prior to adding AFB1 totally eliminated inhibition by Childe and partially eliminated inhibition by Pho, indicating that the inhibitory effect of Chlide, and to some extent Pho, was mediated through direct trapping of AFB1. Furthermore, spectrophotometric analysis showed that Pho treatment could increase GST activity in Hepa-1 cells. These observations indicate that the chlorophyll derivatives studied may attenuate AFB1-induced DNA damage in the Hepa-1 cell by direct trapping of AFB1. Pho provided additional protection not only by direct trapping, but also by increasing GST activity against hepatic AFB1 metabolites
關聯:	Mutation Res-Gen Tox En.(657):98-104.
資料類型:	article
顯示於類別:	[保健營養學系暨研究所] 期刊論文

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