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Journal of Environmental Pathology, Toxicology and Oncology

Publicado 4 números por año

ISSN Imprimir: 0731-8898

ISSN En Línea: 2162-6537

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 2.4 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 2.8 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.5 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00049 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.59 SJR: 0.429 SNIP: 0.507 CiteScore™:: 3.9 H-Index: 49

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Effects of Turmeric on the Activities of Benzo (a) pyrene-Induced Cytochrome P-450 Isozymes

Volumen 20, Edición 1, 2001, 6 pages
DOI: 10.1615/JEnvironPatholToxicolOncol.v20.i1.100
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SINOPSIS

Turmeric and/or its main coloring component, curcumin (diferuloylmethane), have been shown to inhibit benzo(a) pyrene [B(a)P]-induced forestomach papillomas in mice. However, the mechanisms of turmeric-mediated chemoprevention are not well understood.To study the mechanisms of turmeric-mediated chemoprevention, we investigated the effects of turmeric feeding on the activities of isozymes of cytochrome P-450 (CYP450)—namely, ethoxyresorufin O-deethylase (EROD, CYP1A1) and methoxyresorufin O-demethylase (MROD, CYP1A2)—which are predominantly involved in the metabolism of B(a)P. We determined the activities of EROD and MROD by monitoring the formation of resorufin from respective substrates in the presence of microsomal proteins obtained from tissues of control, 1% turmeric, 1 mg B(a)P, and 1% turmeric + 1 mg B(a)P-fed Swiss mice. The results indicate that the administration of turmeric through diet significantly inhibited the activities of both EROD and MROD in forestomach (target organ), liver, and lung. In vitro studies employing curcumin, demethoxycurcumin, and bis-demethoxycurcumin suggest that curcumins are the inhibitors in turmeric. Inhibition of B(a)P metabolizing phase I enzymes (EROD, MROD) may be at least in part one of the possible modes of chemopreventive action of turmeric/curcumin.

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