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International Journal of Medicinal Mushrooms

Published 12 issues per year

ISSN Print: 1521-9437

ISSN Online: 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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Characterization of Cross-Flow Ultrafiltration Fractions from Maitake Medicinal Mushroom, Grifoia frondosa (Agaricomycetes), Reveals Distinct Cytotoxicity in Tumor Cells

Volume 18, Issue 8, 2016, pp. 671-680
DOI: 10.1615/IntJMedMushrooms.v18.i8.30
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ABSTRACT

β-glucans from Basidiomycetes like Grifola frondosa (the maitake mushroom) are well known for their health benefits. Polysaccharide preparations from medicinal mushrooms such as G. frondosa have been successfully tested in a vast number of studies. Many mushroom extracts have been developed and today are merchandized for use medicinally and commercially. Studies could show that, in particular, chemical structural features such as the molecular size of β-glucans significantly influence their bioactivity. Thus it is highly important to explore the composition and structural properties of β-glucans extracted from medicinal mushrooms and their effects on human tumor cell viability. Our study focuses on the molecular weight cutoff distribution of β-glucans in hot water−based extracts from maitake mushrooms. Cross-flow ultrafiltration was applied to obtain 5 fractions of different molecular size. β-glucan content was quantified using an enzyme-based test kit, specialized to 1,3-1,6-β-glucans. Here we show that only small amounts of β-glucans with a high molecular weight (>100 kDa) could be detected from an aqueous extract of G. frondosa. The main compounds encompass substances with a low molecular weight (<5 kDa), composing about 35% of the whole extract. In addition, tumor cell viability studies demonstrate significant cytotoxic potential in 2 different solid cancer cell types for the fraction with a high molecular weight (>100 kDa) and for 1 fraction with a low molecular weight (5−10 kDa). In summary, our experiments prove that cross-flow ultrafiltration serves as a quick and easy method for dividing crude aqueous mushroom extracts into different molecular-weight fractions that inhibit tumor cell viability in vitro.

CITED BY
  1. Sari Miriam, Prange Alexander, Lelley Jan I., Hambitzer Reinhard, Screening of beta-glucan contents in commercially cultivated and wild growing mushrooms, Food Chemistry, 216, 2017. Crossref

  2. Zhao Mingzhi, Hao Bingbing, Li Honghao, Cai Man, Xie Jingjing, Liu Hongyu, Tan Minjia, Zhai Linhui, Yu Qun, Peptidyl‐Lys metalloendopeptidase (Lys‐N) purified from dry fruit of Grifola frondosa demonstrates “mirror”digestion property with lysyl endopeptidase (Lys‐C) , Rapid Communications in Mass Spectrometry, 34, 2, 2020. Crossref

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