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Medicines (Basel). 2018 Aug 10;5(3). pii: E87. doi: 10.3390/medicines5030087.

Anticancer Effects of Green Tea and the Underlying Molecular Mechanisms in Bladder Cancer.

Author information

1
Department of Urology, Nagasaki University Graduate School of Biomedical Sciences, 852-8501 Nagasaki, Japan. int.doc.miya@m3.dion.ne.jp.
2
Department of Urology, Nagasaki University Graduate School of Biomedical Sciences, 852-8501 Nagasaki, Japan. tomozo1228@hotmail.com.
3
Department of Urology, Nagasaki University Graduate School of Biomedical Sciences, 852-8501 Nagasaki, Japan. k-araki205@cameo.plala.or.jp.
4
Department of Urology, Nagasaki University Graduate School of Biomedical Sciences, 852-8501 Nagasaki, Japan. yn1238056@yahoo.co.jp.
5
Department of Urology, Nagasaki University Graduate School of Biomedical Sciences, 852-8501 Nagasaki, Japan. gaasara3@gmail.com.
6
Department of Urology, Nagasaki University Graduate School of Biomedical Sciences, 852-8501 Nagasaki, Japan. ohba-k@nagasaki-u.ac.jp.
7
Department of Urology, Nagasaki University Graduate School of Biomedical Sciences, 852-8501 Nagasaki, Japan. hsakai@nagasaki-u.ac.jp.

Abstract

Green tea and green tea polyphenols (GTPs) are reported to inhibit carcinogenesis and malignant behavior in several diseases. Various in vivo and in vitro studies have shown that GTPs suppress the incidence and development of bladder cancer. However, at present, opinions concerning the anticancer effects and preventive role of green tea are conflicting. In addition, the detailed molecular mechanisms underlying the anticancer effects of green tea in bladder cancer remain unclear, as these effects are regulated by several cancer-related factors. A detailed understanding of the pathological roles and regulatory mechanisms at the molecular level is necessary for advancing treatment strategies based on green tea consumption for patients with bladder cancer. In this review, we discuss the anticancer effects of GTPs on the basis of data presented in in vitro studies in bladder cancer cell lines and in vivo studies using animal models, as well as new treatment strategies for patients with bladder cancer, based on green tea consumption. Finally, on the basis of the accumulated data and the main findings, we discuss the potential usefulness of green tea as an antibladder cancer agent and the future direction of green tea-based treatment strategies for these patients.

KEYWORDS:

animal model; bladder cancer; epidemiology; green tea; treatment

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