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Effects of Caffeic Acid Methyl Ester from Mentha arvensis Linne var. piperascens on Function of E6 Oncoprotein of HPV 16  

Baek, Tae-Woong (Laboratory of Cell Biology, Korea Research Institute of Bioscience and Biotechnology)
Lee , Kyung-Ae (Laboratory of Cell Biology, Korea Research Institute of Bioscience and Biotechnology)
Ahn , Min-Jung (Laboratory of Cell Biology, Korea Research Institute of Bioscience and Biotechnology)
Joo, Hae-Hyung (Laboratory of Cell Biology, Korea Research Institute of Bioscience and Biotechnology)
Oh , Hyun-Cheol (Laboratory of Cell Biology, Korea Research Institute of Bioscience and Biotechnology)
Ahn , Jong-Seok (Laboratory of Cell Biology, Korea Research Institute of Bioscience and Biotechnology)
Cho , Yong-Kweon (Department of Healthscience and Biochemistry, Changwon National University)
Myung , Pyung-Keun (Department of Pharmacy, College of Pharmacy Chungnam National University)
Yoon, Do-Young (Laboratory of Cell Biology, Korea Research Institute of Bioscience and Biotechnology)
Publication Information
YAKHAK HOEJI / v.48, no.6, 2004 , pp. 328-334 More about this Journal
Abstract
Cervical cancer is one of the leading causes of female death. Viral oncoproteins E6 and E7 are selectively retained and expressed in carcinoma cells infected with HPV (Human pa pilloma virus) type 16 and cooperated in immotalization and transformation of primary keratinocyte. E6 and E7 oncoproteins interfere the functions of tumor suppressor proteins p53 and retinoblasoma protein (pRb), respectively. Among a lots of natural products, Mentha arvensis Linne var.piperascens have inhibitory effects on bindings between E6 oncoprotein and tumor suppressor p53, E3 ubiqutin- protein ligase (E6AP). HPV oncoprotein inhibitors from Mentha piperita L. were isolated by solvent partition and column chromatography (Silica gel, RP-18) and inhibitory compounds were finally purified by HPLC using an ELISA screening system based on binding between E6 and E6AP. The aim of this study is to identify the structure of inhibitory compounds and to investigate whether these compounds have inhibitory effects on functions of E6 oncoprotein. We investigated whether caffeic acid methyl ester (CAM) extracted from Mentha piperita L. could inhibit the function of E6 oncoprotein. CAM inhibited the in vitro binding of E6 and E6AP which are essential for the binding and degradation of the tumor suppressor p53 and also inhibited the proliferation of human cervical cancer cell lines (SiHa and CaSKi) in a dose response manner. These results suggest that CAM inhibited the function of E6 oncoprotein, suggesting that it can be used as a potential drug for the treatment of cervical cancers infected with HPV.
Keywords
Human papilloma virus (HPV); Mentha arvensis Linne var.piperascens; E6AP; E6 AND Caffeic acid methyl ester;
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