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International Journal of Medicinal Mushrooms

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ISSN Druckformat: 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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Bioactivity-Guided Isolation of Acetylcholinesterase Inhibitor from Ganoderma mediosinense (Agaricomycetes)

Volumen 21, Ausgabe 8, 2019, pp. 755-763
DOI: 10.1615/IntJMedMushrooms.2019031508
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ABSTRAKT

The involvement of high acetylcholinesterase (AChE) activity and oxidative stress in the brain is well documented in the progression of dementia. Thus, finding a drug with both AChE-inhibitory and antioxidant activities could be beneficial in treating dementia. We previously reported the AChE-inhibitory and antioxidant-mediated antiamnestic effects of a hydromethanol extract from Ganoderma mediosinense (HME), which we evaluated using in vitro and in vivo models. Mycochemical screening of HME showed the presence of phenols. Building on those findings, this study was designed to isolate the compound responsible for the AChE-inhibitory and antioxidant activities of G. mediosinense. The HME was fractionated sequentially with solvents−namely, hexane, chloroform, and ethyl acetate. The prepared fractions were evaluated by using Ellman and DPPH-inhibitory assays in vitro. Among the fractions, the ethyl acetate fraction showed appreciable AChE-inhibitory (half-maximal inhibitory concentration [IC50] 0.81 ± 0.04 mg/mL) and DPPH scavenging (IC50 2.04 ± 0.77 μg/mL) activities; therefore it was subjected to flash chromatography, which separated 9 subfractions. Subfraction 7 showed marked activity in inhibiting AChE (IC50 0.10 ± 0.02 mg/mL) and free radicals (IC50 1.22 ± 0.04 μg/mL). Purification of subfraction 7 yielded a white compound, AK1. This was characterized as gallic acid by using Fourier-transform infrared, nuclear magnetic resonance, and mass spectral studies. This study shows that gallic acid, a well-recognized phenolic acid, is responsible for the AChE-inhibitory and DPPH scavenging activities of G. mediosinense.

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REFERENZIERT VON
  1. Pruthi Simran, Kaur Karanpreet, Singh Varinder, Shri Richa, Improvement of cognitive function in mice by Citrus reticulata var. kinnow via modulation of central cholinergic system and oxidative stress, Metabolic Brain Disease, 36, 5, 2021. Crossref

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