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International Journal of Medicinal Mushrooms

年間 12 号発行

ISSN 印刷: 1521-9437

ISSN オンライン: 1940-4344

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: 1.2 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: 1.4 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: 0.3 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: 0.00066 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: 0.34 SJR: 0.274 SNIP: 0.41 CiteScore™:: 2.8 H-Index: 37

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Antioxidant and Gene Protective Effects of Medicinal Mushrooms Inonotus obliquus (Pers.:Fr.) Pilat and Phellinus robustus (P. Karst.) Bourd. et Galz.

巻 7, 発行 3, 2005, 388 pages
DOI: 10.1615/IntJMedMushrooms.v7.i3.370
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要約

Fungal melanin pigments were shown to display high antioxidant activity. This work was designed to isolate melanin pigments from Inonotus obliquus and Phellinus robustus to study their antioxidant and gene protective properties during metabolic activation of aromatic amines by the peroxidase pathway of oxidation.
Investigation of the element composition of exo-and endomelanins of Inonotus obliquus and Phellinus robustus showed that these species distinguish one from another insignificantly. However, it has been demonstrated that the content of carboxyl groups in endomelanins of both investigated species was two times higher in comparison with exomelanins. IR- spectra of exo- and endomelanins of I. obliquus and Ph. Robustus were also similar. The molecular weight of exo- and endomelanines from I. obliquus was 35−60 kDa, and from Ph. Robustus 40−60 kDa.
The obtained data indicate that the alkaline fraction of exo- and endomelanins of I. obliquus had a molecular mass of 55−60 kDa, Ph. Robustus 65−70 kDa, the alcohol fraction of I. obliquus 25−30 kDa, and Ph. robustus 40−45 kDa. The melanins of both species also contained a small quantity of substances with the molecular mass of 100−120 kDa.
Melanins isolated from both mushrooms and applied at a concentration above 20 μg/mL inhibited the reaction of peroxidase-mediated oxidation of o-dianisidine (DA). It was demonstrated that the ability of melanin isolated from Ph. Robustus to inhibit peroxidase-mediated free radical oxidation of DA was considerably lower than that of the pigment from I. obliquus. The highest degrees of inhibition of peroxidase-mediated DA oxidation with melanins isolated from Ph. Robustus (75 μg/mL) and I. obliquus (75 μg/mL) mushrooms were 75% and 80%, respectively. Our data showed that melanin isolated from I. obliquus inhibited peroxidase-mediated oxidation of DA more efficiently than it prevented damage to DNA induced by oxidation products. In contrast, melanin from Ph. Robustus applied at a lower concentration inhibited the formation of DNA/DNA crosslinks more readily than it prevented DA oxidation. Such properties of melanins can be used in developing new anticarcinoganic drugs.

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