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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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Induction of Apoptosis in Thymocytes by Hippophae rhamnoides: Implications in Radioprotection

Volumen 23, Edición 2, 2004, 16 pages
DOI: 10.1615/JEnvPathToxOncol.v23.i2.50
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SINOPSIS

Hippophae rhamnoides (RH-3), which has been recently reported to elicit dose-dependent pro- and antioxidant properties in vitro, induced apoptosis in murine thymocytes. In a concentration-dependent manner, RH-3 induced apoptosis in thymocytes in ex vivo conditions. The maximum effect was observed with 100 μg/mL of RH-3. Beyond this dose, the induction of apoptosis was inhibited, as seen on the ladder formation. However, apoptotic body formation, another indicator of apoptosis, was not manifested when various doses of RH-3 (20—200 μg/mL) were administered. RH-3 (>100 μg/mL) compacted chromatin in the form of densely stained masses, and subsequent treatment with proteinase-K loosened them and developed a halo around each mass. RH-3 treatment of cells that had already undergone apoptosis induced chromatin compaction, which made the ladder invisible. During in vivo experiments in mice, the radioprotective dose of RH-3 (30 mg/kg b.w.) induced significant DNA fragmentation in thymocytes studied spectrofluorimetrically. RH-3 treatment before irradiation in vivo enhanced radiation-induced apoptosis. These results were confirmed by hypodiploid population studied flow-cytometrically and also by ladder formation. RH-3 treatment was prooxidative in nature because it depleted thiols and enhanced lipids peroxidation after 8 hours of treatment. The paradox between the prooxidant and the antioxidant effects of RH-3 in the context of its overall radioprotective efficacy has been explained.

CITADO POR
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