safrole/kansè

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Safrole-DNA adducts in tissues from esophageal cancer patients: clues to areca-related esophageal carcinogenesis.

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Epidemiological studies have demonstrated that areca quid chewing can be an independent risk factor for developing esophageal cancer. However, no studies are available to elucidate the mechanisms of how areca induces carcinogenesis in the esophagus. Since the areca nut in Taiwan contains a high

Safrole induces apoptosis in human oral cancer HSC-3 cells.

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Phytochemicals have been used as potential chemopreventive or chemotherapeutic agents. However, there are data suggesting a mutagenic effect of some phytochemicals. We hypothesized that safrole would have anticancer effects on human oral squamous cell carcinoma HSC-3 cells. Safrole decreased the

Safrole-like DNA adducts in oral tissue from oral cancer patients with a betel quid chewing history.

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Betel quid (BQ) chewing has been associated with an increased risk of oral squamous cell carcinoma (OSCC) and oral submucous fibrosis (OSF). Piper betel inflorescence, which contains 15 mg/g safrole, is a unique ingredient of BQ in Taiwan. Chewing such prepared BQ may contribute to safrole exposure

Safrole induces cell death in human tongue squamous cancer SCC-4 cells through mitochondria-dependent caspase activation cascade apoptotic signaling pathways.

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Safrole is one of important food-borne phytotoxin that exhibits in many natural products such as oil of sassafras and spices such as anise, basil, nutmeg, and pepper. This study was performed to elucidate safrole-induced apoptosis in human tongue squamous carcinoma SCC-4 cells. The effect of safrole

Evidence that 4-allyl-o-quinones spontaneously rearrange to their more electrophilic quinone methides: potential bioactivation mechanism for the hepatocarcinogen safrole.

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Several naturally occurring aromatic ethers, of which safrole [1-allyl-3,4-(methylenedioxy)-benzene] is one example, are hepatocarcinogens. One bioactivation pathway previously proposed for safrole involves hydroxylation of the benzyl carbon, conjugation with sulfate, and then alkylation of DNA with

The metabolic activation and nucleic acid adducts of naturally-occurring carcinogens: recent results with ethyl carbamate and the spice flavors safrole and estragole.

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A small (approximately 30) but varied group of organic and inorganic compounds appear to be carcinogenic in both humans and experimental animals. A much larger number and wider variety of chemical carcinogens, primarily synthetic organic compounds, are known for experimental animals. These agents

Neoplastic response of mouse tissues during perinatal age periods and its significance in chemical carcinogenesis.

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A series of studies pertaining to perinatal carcinogenesis have been reviewed. Their main objective was development and definition of a sensitivity biologic model for carcinogenicity screening. Data were summarized on factors modifying the carcinogenic response of various tissues following

Safrole-DNA adducts in human peripheral blood--an association with areca quid chewing and CYP2E1 polymorphisms.

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It has been recently demonstrated that safrole (4-allyl-1,2-methylenedioxybenzene)-DNA adducts are present in oral cancer tissue from patients who have chewed areca quid (AQ) containing high concentration of safrole. In this study, the presence of safrole-DNA adducts in peripheral white blood cells

Safrole suppresses murine myelomonocytic leukemia WEHI-3 cells in vivo, and stimulates macrophage phagocytosis and natural killer cell cytotoxicity in leukemic mice.

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Many anticancer drugs are obtained from phytochemicals and natural products. However, some phytochemicals have mutagenic effects. Safrole, a component of Piper betle inflorescence, has been reported to be a carcinogen. We have previously reported that safrole induced apoptosis in human oral cancer

Anti-hepatoma effect of safrole from Cinnamomum longepaniculatum leaf essential oil in vitro.

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The aim of this study was to study the anti-hepatoma effect of safrole and elucidate its molecular mechanism, the human hepatoma BEL-7402 cells were incubated with various concentrations (40, 80, 160, 320 and 640 μg/ml) of safrole and the cell proliferation and apoptosis were evaluated. The results

Structure-activity studies of the carcinogenicities in the mouse and rat of some naturally occurring and synthetic alkenylbenzene derivatives related to safrole and estragole.

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Twenty-three naturally occurring and synthetic alkenylbenzene derivatives structurally related to the hepatocarcinogen safrole (1-allyl-3,4-methylenedioxybenzene) were assayed for their hepatocarcinogenicity in mice. Some of these compounds (safrole, estragole, eugenol, anethole, methyleugenol,

Safrole induces G0/G1 phase arrest via inhibition of cyclin E and provokes apoptosis through endoplasmic reticulum stress and mitochondrion-dependent pathways in human leukemia HL-60 cells.

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Safrole, a component of Piper betle inflorescence, is a carcinogen which has been demonstrated to induce apoptosis on human oral cancer HSC-3 cells in vitro and to inhibit HSC-3 cells in xenograft tumor cells in vivo. In our previous study, safrole promoted phagocytosis by macrophages and natural

Extraction and separation of volatile and fixed oils from seeds of Myristica fragrans by supercritical CO₂: chemical composition and cytotoxic activity on Caco-2 cancer cells.

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Isolation of volatile and fixed oils from nutmeg have been obtained by supercritical fractioned extraction with carbon dioxide. Extraction experiments were carried out at pressures of 90 and 250 bar and temperature of 40 °C. The extraction step performed at 90 bar produced a volatile fraction mainly

Sulfotransferase 1A1 and glutathione S-transferase P1 genetic polymorphisms modulate the levels of urinary 8-hydroxy-2'-deoxyguanosine in betel quid chewers.

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Betel quid chewing has been associated with several human cancers. However, the role of betel quid in carcinogenesis remains uncertain. Piper betel contains high concentrations of safrole (an inducer of DNA oxidative damage). Safrole may be metabolized by hepatic sulfotransferase 1A1 (SULT1A1), or

Carcinogenicity testing of some constituents of black pepper (Piper nigrum).

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In mice, injection of safrole, tannic acid or methylcholanthrene (MCA) during the preweaning period induced tumors in different organs. Safrole and tannic acid (constituents of black pepper) were weak carcinogens when compared with MCA which was used as a carcinogenic control substance. Force

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