- Brown oyster mushroom
- Hao gu
For Patients & Caregivers
Oyster mushroom has not been shown to treat cancer in humans.
Oyster mushroom is an edible fungus. It is used in traditional medicine to treat infections, diabetes, cancer, and to lower cholesterol. Laboratory experiments and studies done in mice have shown that oyster mushrooms have antitumor, antifungal, and cholesterol lowering properties. A study done in children with upper respiratory tract infections showed that oyster mushroom has anti-allergic effects.
Oyster mushrooms increased survival in tumor-bearing mice but no such studies have been done in humans.
One laboratory study showed that Oyster mushroom has antifungal activity.
Studies done in mice have shown that Oyster mushroom lowers hyperlipidemia. But a clinical trial did not find such benefits in HIV patients who had high cholesterol induced by antiretroviral treatment.
Experiments done in mice indicate that Oyster mushroom has hypoglycemic effects but no such studies have been done in humans.
For Healthcare Professionals
Oyster mushroom is an edible fungus found widely in North America and Europe. It is used in traditional medicine to treat infections, hyperlipidemia, diabetes, and cancer.
In vitro experiments and studies done in mice have shown that oyster mushroom has antitumor (1)(7)(8)(9)(12)(13), immunomodulatory (10)(11), antifungal (2), lipid lowering, and hypoglycemic (3)(6) properties. Beneficial effects are due to the polysaccharides, lectins, and peptides present in oyster mushrooms.
In a study of HIV patients with antiretroviral treatment-induced hypercholesterolemia, oyster mushroom was not effective in lowering non-HDL cholesterol (5). However, pleuran, a beta-glucan isolated from oyster mushroom, demonstrated anti-allergic effects in children with respiratory tract infections (17).
Pleurostrin, a peptide derived from the fruiting bodies of oyster mushroom, exhibited antifungal properties (2). Mevinolin, another compound, decreased cholesterol biosynthesis by inhibiting HMG CoA reductase, which is the rate limiting enzyme in cholesterol biosynthesis (3). Ostreolysin, a cytolytic protein isolated from oyster mushroom, caused bradycardia, myocardial ischemia and ventricular extrasystoles following intravenous injection in mice (14).
A lectin isolated from the fruiting bodies of oyster mushroom demonstrated antitumor activity in mice bearing sarcoma and hepatoma (1). Another study found that the development of precancerous aberrant crypt foci (ACF) was significantly reduced in mice that were fed a diet containing 10% pleuran, a beta-glucan isolated from oyster mushroom (4). RNase Po1, a guanylic acid-specific ribonuclease (a RNase T1 family RNase) from oyster mushroom has been shown to induce apoptosis in tumor cells (18).