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Amauroderma rugosum , commonly known as “Jiǎzī” in China, is a wild mushroom traditionally used by the Chinese to reduce inflammation, to treat diuretic and upset stomach, and to prevent cancer. It is also used by the indigenous communities in Malaysia to prevent epileptic episodes and incessant crying by babies. The aim of this study was to compare the wild and domesticated basidiocarps of  A .  rugosum  for antioxidant and  in vitro  anti-inflammatory effects in LPS-stimulated RAW264.7 cells. The wild basidiocarps of  A .  rugosum  were collected from the Belum Forest, Perak, Malaysia and the domesticated basidiocarps of  A .  rugosum  were cultivated in the mushroom house located in the University of Malaya, Kuala Lumpur, Malaysia. Both the wild and domesticated basidiocarps were subjected to ethanolic extraction and the extracts were tested for antioxidant and anti-inflammatory activities. In this study, the crude ethanolic extract of wild (WB) and domesticated (DB) basidiocarps of  A .  rugosum  had comparable total phenolic content and DPPH scavenging activity. However, WB (EC 50  = 222.90 μg/mL) displayed a better ABTS cation radical scavenging activity than DB (EC 50  = 469.60 μg/mL). Both WB and DB were able to scavenge nitric oxide (NO) radical and suppress the NO production in LPS-stimulated RAW264.7 cells and this effect was mediated through the down-regulation of inducible nitric oxide synthase (iNOS) gene. In addition, both WB and DB caused down-regulation of the inflammatory gene TNF-α and the up-regulation of the anti-inflammatory gene IL-10. There was no inhibitory effect of WB and DB on nuclear translocation of NF-κB p65. In conclusion, the wild and domesticated basidiocarps of  A .  rugosum  possessed antioxidant and  in vitro  anti-inflammatory properties. WB and DB inhibited downstream inflammatory mediators (TNF-α and NO) and induced anti-inflammatory cytokine IL-10 production. No inhibitory effects shown on upstream nuclear translocation of NF-κB p65. WB and DB exhibited antioxidant activity and attenuation of proinflammatory mediators and therefore,  A .  rugosum  may serve as a potential therapeutic agent in the management of inflammation.

plos one

Attenuation of Inflammatory Mediators (TNF-α and Nitric Oxide) and Up-Regulation of IL-10 by Wild and Domesticated Basidiocarps of Amauroderma rugosum (Blume &amp; T. Nees) Torrend in LPS-Stimulated RAW264.7 Cells