Abstract
Casuarinin, a hydrolyzable tannin isolated from the bark of Terminalia arjuna L. (Combretaceae), was investigated for its antiproliferative activity in human breast
adenocarcinoma MCF-7 cells. The results showed that casuarinin inhibited the proliferation
of MCF-7 by blocking cell cycle progression in the G0/G1 phase and inducing apoptosis.
An enzyme-linked immunosorbent assay showed that casuarinin increased the expression
of p21/WAF1 concomitantly as the MCF-7 cells underwent G0/G1 arrest. An enhancement
in Fas/APO-1 and its two forms of ligands, membrane-bound Fas ligand (mFasL) and soluble
Fas ligand (sFasL), might be responsible for the apoptotic effect induced by casuarinin.
Our study reports here for the first time that the induction of p21/WAF1 and the activity
of Fas/Fas ligand apoptotic system may participate in the antiproliferative activity
of casuarinin in MCF-7 cells.
Key words
Terminalia arjuna
- Combretaceae - casuarinin - p53 - p21/WAF1 - Fas/APO-1 - Fas ligand - apoptosis
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Professor Chun-Ching Lin
Graduate Institute of Natural Products
College of Pharmacy
Kaohsiung Medical University
100 Shih-Chuan 1st Road
Kaohsiung 807
Taiwan
R.O.C.
Phone: +886-7-3121101 ext. 2122
Fax: +886-7-3135215
Email: aalin@ms24.hinet.net