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Suppressive Effect of Fruiting Bodies of Medicinal Mushrooms on Demyelination and Motor Dysfunction in a Cuprizone-Induced Multiple Sclerosis Mouse Model.

Epidemiologic studies have shown a high prevalence of multiple sclerosis (MS) in Europe and North America, and a low prevalence in East Asia. Mushrooms contain various biological response modifiers (BRMs) and are widely used in traditional Chinese medicine in East Asian countries. To investigate whether mushrooms have potential beneficial effects on MS, we administered mushrooms to cuprizone (bis-cyclohexanone-oxalyldihydrazone, CPZ)-induced MS model mice. This model is used to study the processes of demyelination in the CNS. The CPZ-induced demyelination is involved in the apoptotic death of mature oligodendrocytes, neuroinflammation, and motor dysfunction. Mice were fed a powdered diet containing 5% each mushroom and CPZ diet for 5 weeks, which coincides with peak demyelination. We measured the body weight of the mice, evaluated their motor function using a rotarod, and quantified the myelin levels using Black-Gold II staining. Ganoderma lucidum and Hericium erinaceus treatments showed recovery from weight loss. Pleurotus eryngii, G. lucidum, and Flammulina velutipes treatments significantly improved CPZ-induced motor dysfunction. P. eryngii, G. lucidum, F. velutipes, and H. erinaceus treatments effectively suppressed CPZ-induced demyelination. The four medicinal mushrooms may be promising BRMs for prevention and alleviation of the symptoms of MS.