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Published in: Journal of Natural Medicines 4/2016

01-10-2016 | Original Paper

Antioxidative activities of 62 wild mushrooms from Nepal and the phenolic profile of some selected species

Authors: Sonam Tamrakar, Hai Bang Tran, Marina Nishida, Satoru Kaifuchi, Hiroto Suhara, Katsumi Doi, Katsuya Fukami, Gopal Prasad Parajuli, Kuniyoshi Shimizu

Published in: Journal of Natural Medicines | Issue 4/2016

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Abstract

Mushrooms have garnered immense popularity for their nutritional as well as medicinal values. The therapeutic potential of mushrooms in Nepal, a country well known for its biodiversity and natural medicinal resources, remains largely unstudied. Therefore, this study attempts to unveil the antioxidative properties of Nepalese wild mushrooms. Sixty-two wild mushroom samples were collected from several forests in different parts of Nepal. Ethanol and water extracts of the dried samples were tested for their antioxidative activities using total phenolic content (TPC), oxygen radical absorbance capacity (ORAC) assay, 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), and reducing power (RP) assays. Ethanol extracts of samples belonging to the order Hymenochaetales showed significantly high activity in all the assays. Inonotus clemensiae had an exceptionally high TPC of 643.2 mg gallic acid equivalent (GAE)/g extract and also exhibited the lowest EC50 values in DPPH (0.081 mg/mL), ABTS (0.409 mg/mL), and EC0.5 value in reducing power (RP; 0.031 mg/mL) assays. High-performance liquid chromatography (HPLC) analysis of the top ten samples with the highest TPC was done to identify the phenolic compounds in the extracts, followed by liquid chromatography–mass spectrometry (LC–MS) analysis for some unknown compounds. These findings highlight the very strong antioxidative activity of Nepalese mushrooms, and paves the way for further research to explore their economic potential.
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Metadata
Title
Antioxidative activities of 62 wild mushrooms from Nepal and the phenolic profile of some selected species
Authors
Sonam Tamrakar
Hai Bang Tran
Marina Nishida
Satoru Kaifuchi
Hiroto Suhara
Katsumi Doi
Katsuya Fukami
Gopal Prasad Parajuli
Kuniyoshi Shimizu
Publication date
01-10-2016
Publisher
Springer Japan
Published in
Journal of Natural Medicines / Issue 4/2016
Print ISSN: 1340-3443
Electronic ISSN: 1861-0293
DOI
https://doi.org/10.1007/s11418-016-1013-1

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