New York Presbyterian
Hospital and the Weill Medical College
Worldwide clinical trials
have chiseled out a definite place for curcumin
(turmeric) in oncology. Among them are New York Presbyterian
Hospital and the Weill Medical College, which reported that curcumin,
a curcuminoid found in turmeric, directly inhibited the COX-2 enzyme (Zhang
et al. 1999). So excited are various oncologists regarding curcumin that
curcumin
has been classed as a potential third generation cancer chemopreventive
agent.
Gastrointestinal
Cancer Research Laboratory/ Charles A. Sammons Cancer Center and Baylor
Research Institute, Baylor University Medical Center, Dallas, Texas.
Various pre clinical cell
culture and animal studies suggest that curcumin
has potential as an antiproliferative, anti-invasive, and antiangiogenic
agent; as a mediator of chemoresistance and radioresistance;
as
a chemopreventive agent; and as a therapeutic agent. The spice once relegated
to the kitchen shelf, has moved into the clinic and may prove to be "Curecumin".
University
of Texas M. D. Anderson Cancer Center, Houston, TX, USA
Curcumin (diferuloylmethane)
is a polyphenol derived from the plant Curcuma
longa, commonly called turmeric. Extensive research over the
last 50 years has indicated this polyphenol
can
both prevent and treat cancer.
National Research
Laboratory of Molecular Carcinogenesis and Chemoprevention, College of
Pharmacy, Seoul National University, South Korea
Chemoprevention, which is
referred to as the use of nontoxic natural or synthetic chemicals to intervene
in multistage carcinogenesis, has emerged as a promising and pragmatic
medical approach to reduce the risk of cancer. Numerous components of edible
plants, collectively termed "phytochemicals" have been reported to possess
substantial chemopreventive properties. Curcumin, a yellow coloring ingredient
derived from Curcuma longa L. (Zingiberaceae), is one of the most extensively
investigated and well-defined chemopreventive phytochemicals. Curcumin
has been shown to protect against skin, oral, intestinal, and colon carcinogenesis
and also to suppress angiogenesis and metastasis in a variety animal tumor
models. It also inhibits the proliferation of cancer cells by
arresting them in the various phases of the cell cycle and by inducing
apoptosis. Moreover, curcumin has a capability to inhibit carcinogen bioactivation
via suppression of specific cytochrome P450 isozymes, as well as to induce
the activity or expression of phase II carcinogen detoxifying enzymes.
Laboratoire
de Biologie Moléculaire et Cellulaire du Cancer, Hôpital Kirchberg,
Luxembourg,
Chemoprevention is a promising
anti-cancer approach with reduced secondary effects in comparison to classical
chemotherapy. Curcumin, one of the most studied
chemopreventive agents, is a natural compound extracted from Curcuma longa
L. that allows suppression, retardation or inversion of carcinogenesis.
Curcumin is also described as an anti-tumoral, anti-oxidant and anti-inflammatory
agent capable of inducing apoptosis in numerous cellular systems. In this
review, we describe both properties and mode of action of curcumin on carcinogenesis,
gene expression mechanisms and drug metabolism.
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