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Journal of Environmental Pathology, Toxicology and Oncology

Erscheint 4 Ausgaben pro Jahr

ISSN Druckformat: 0731-8898

ISSN Online: 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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Effect of Caffeine on the Genotoxic Effects of Gamma Radiation and 4-NQO in Diploid Yeast

Volumen 20, Ausgabe 1, 2001, 8 pages
DOI: 10.1615/JEnvironPatholToxicolOncol.v20.i1.70
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ABSTRAKT

Caffeine is an environmental agent to which people are commonly exposed through medicines, drinks, food items, etc. It has been shown to be mutagenic in a number of test systems. In addition, it has also been shown to modify the mutagenic response of ionizing radiation, UV, and several chemical mutagens in a number of test systems.We have studied the effect of caffeine on gamma radiation and 4-Nitroquinoline 1-oxide (4-NQO)-induced gene conversion in the yeast Saccharomyces cerevisiae D7. Stationary phase cells were either exposed to 100-600 Gy of 60Co gamma radiation or treated with 0.15-0.3 μM 4-NQO (30°C, 1 hour), after which they were plated on synthetic complete or minimal media with or without caffeine. Caffeine concentrations ranged from 5 to 15 mM. The results indicated that caffeine at 5 and 10 mM decreased gamma radiation-induced gene conversion frequencies significantly at 400 and 600 Gy. At 600 Gy, the decrease was about 30% and 50% with caffeine concentrations of 5 and 10 mM, respectively. In contrast, caffeine was found to increase the induced gene conversion frequency when cells treated with 0.15, 0.225, and 0.3 μM 4-NQO were plated on media containing caffeine. The increase with 5, 10, and 15 mM caffeine was approximately 1.5, 2, and 2.5, respectively, times the value of 4-NQO alone. The results indicate that the posttreatment repair processes following gamma irradiation or 4-NQO treatment are modified via different pathways.

REFERENZIERT VON
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  2. Hatzi Vasiliki I., Karakosta Maria, Barszczewska Katarzyna, Karachristou Ioanna, Pantelias Gabriel, Terzoudi Georgia I., Low concentrations of caffeine induce asymmetric cell division as observed in vitro by means of the CBMN-assay and iFISH, Mutation Research/Genetic Toxicology and Environmental Mutagenesis, 793, 2015. Crossref

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