Reishi stops Nf-kappa B AND Nf-kappaB causes RH => means Reishi could stop RH
Reishi looks to stop Nf-Kappa B... here are some studies
Ganoderma lucidum inhibits proliferation of human breast cancer cells by down-regulation of estrogen receptor and NF-κB signaling
http://partnecglobal.eurasiansupply.com/ds/rd/rdgl/ijo_29_3_695_PDF.pdf
Ganoderma lucidum ethanol extract inhibits the inflammatory response by suppressing the NF-κB and toll-like receptor pathways in lipopolysaccharide-stimulated BV2 microglial cells
http://www.spandidos-publications.com/etm/5/3/957?text=fulltext
NF-Kappa B - is a cause for Rheumatoid Arthritis. Reishi is shown to stop Nf-KappaB from being produced.
Inhibition of NF-kappaB signaling by fenofibrate, a peroxisome proliferator-activated receptor-alpha ligand, presents a therapeutic strategy for rheumatoid arthritis.
http://europepmc.org/abstract/MED/15971419
IL-17 induces production of IL-6 and IL-8 in rheumatoid arthritis synovial fibroblasts via NF-κB- and PI3-kinase/Akt-dependent pathways
http://www.biomedcentral.com/content/pdf/ar1038.pdf
AP-1 and NF-kappaB regulation in rheumatoid arthritis and murine collagen-induced arthritis.
http://www.ncbi.nlm.nih.gov/pubmed/9892501
NF-κB inhibitor targeted to activated endothelium demonstrates a critical role of endothelial NF-κB in immune-mediated diseases
http://www.pnas.org/content/early/2013/09/20/1218219110.full.pdf
The roles of the classical and alternative nuclear factor-κB pathways: potential implications for autoimmunity and rheumatoid arthritis
http://www.biomedcentral.com/content/pdf/ar2457.pdf
More studies I found :
Reishi
General - Reishi and Rheumatoid Arthritis
http://www.taodewan.com/Nutrition/Lingzhi.html
Ganoderma lucidum polysaccharide peptide reduced the production of proinflammatory cytokines in activated rheumatoid synovial fibroblast.
http://www.ncbi.nlm.nih.gov/pubmed/17219061
Safety and efficacy of Ganoderma lucidum (lingzhi) and San Miao San supplementation in patients with rheumatoid arthritis: a double-blind, randomized, placebo-controlled pilot trial.
http://www.ncbi.nlm.nih.gov/pubmed/17907228 - not sure about this study...
Immunomodulatory effects of lingzhi and san-miao-san supplementation on patients with rheumatoid arthritis.
http://www.ncbi.nlm.nih.gov/pubmed/16873089
Safety and efficacy of Ganoderma lucidum (lingzhi) and San Miao San supplementation in patients with rheumatoid arthritis: a double-blind, randomized, placebo-controlled pilot trial
http://www.ncbi.nlm.nih.gov/pubmed/17907228
Cordyceps - might be good for RH as well
Cordycepin inhibits IL-1beta-induced MMP-1 and MMP-3 expression in rheumatoid arthritis synovial fibroblasts.
http://www.ncbi.nlm.nih.gov/pubmed/19056796
Mushrooms in general helping
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3217690/
Phellinus baumii
http://www.ncbi.nlm.nih.gov/pubmed/23463332
Anti-inflammatory diseases
http://www.ncbi.nlm.nih.gov/pubmed/19459738
Clinical Trial - Andosan