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Xanthohumol (XN), the principal flavonoid of the hop plant (Humulus lupulus L.) and a constituent of beer, has been suggested to have potential cancer chemopreventive activities. We have observed that most cancer chemopreventive agents show antiangiogenic properties in vitro and in vivo, a concept we termed "angioprevention." Here we show for the first time(More)
Inflammation is deeply entangled with redox modulation. Triggering of PRRs on inflammatory cells induces ROS generation. As a consequence, activated cells mount antioxidant responses to counteract the possible harmful effects of oxidation. Therefore, when repair is completed, homeostasis is restored. Here, we describe some recent results showing that an(More)
Limited amounts of reactive oxygen species are necessary for cell survival and signaling, but their excess causes oxidative stress. H(2)O(2) and other reactive oxygen species are formed as byproducts of several metabolic pathways, possibly including oxidative protein folding in the endoplasmic reticulum. B- to plasma-cell differentiation is characterized by(More)
Although the vast majority of patients with acute lymphocytic leukemia (ALL) attain remission with modern therapies, relapsed leukemia will continue to be a common malignancy both in childhood and in adults, until new treatments are available. Therapeutic options for advanced B-cell acute lymphocytic leukemia are still limited and acquired drug resistance(More)
Artesunate (ART) is a semi-synthetic derivative of the sesquiterpene artemisinin used for the second line therapy of malaria infections with Plasmodium falciparum. ART also inhibits growth of many transformed cell lines. In the present investigation, we show that ART inhibited the growth of normal human umbilical endothelial cells and of KS-IMM cells that(More)
Dissemination of metastatic cells probably occurs long before diagnosis of the primary tumor. Metastasis during early phases of carcinogenesis in high risk patients is therefore a potential prevention target. The plant polyphenol Curcumin has been proposed for dietary prevention of cancer. We therefore examined its effects on the human breast cancer cell(More)
PURPOSE Green tea consumption has been linked to a reduced occurrence of some tumor types. Current data indicate that the principal mediator of this chemopreventive effect is epigallocatechin-3-gallate (EGCG), the most abundant polyphenol found in dried tea leaves. Here, we examined the effects of this compound on the two key cell populations typically(More)
Several reports have attributed to green tea chemopreventive and therapeutic properties. Epidemiological studies have linked the regular use of green tea to a reduced incidence of breast and colon carcinomas. Tea contains several antioxidants, including polyphenols of the catechin (green tea) and theaflavin (black tea) groups. Green tea derivatives have(More)
Several cancer chemopreventive agents have been demonstrated to exert antiangiogenic effects. Blocking tumor angiogenesis, a process critical for tumor mass expansion and metastasis, represents an intriguing approach not only to cancer therapy, but also to cancer chemoprevention. We found that angiogenesis is a common and key target of many chemopreventive(More)
Lipoic acid (LA) is a sulfated antioxidant produced physiologically as a coenzyme of the pyruvate dehydrogenase complex; it is currently used for treatment of non-insulin-dependent diabetes to favor the cellular uptake of glucose. We have previously described the angiopreventive potential of molecules sharing common features with LA: N-acetyl cysteine,(More)