Oral administration of submerged cultivated Grifola frondosa enhances phagocytic activity in normal mice.
Grifola frondosa fruiting body (Maitake) has been used as a dietary supplement due to its antitumour and immunomodulatory properties. The aim of this study was to evaluate the immunomodulatory effects of orally administered submerged cultivated G. frondosa mixture, including both mycelium and culture broth, in a healthy murine model. Composition analyses showed that submerged cultivated G. frondosa mixture contained only 32.48% carbohydrate, which was less than half of fruiting bodies. The content of adenosine, a potential immunomodulatory agent in medicinal mushrooms, was 2.8 mg g(-1). After feeding 8-week-old female BALB/cByJ mice with AIN-93G diet containing 0% (C), 1% (G1), 3% (G3) or 5% (G5) (wt/wt) G. frondosa mixture for 31 days, neither body weight nor the outward appearance of organs showed any significant difference among different diet groups. Splenocyte subpopulation, mitogen-activated cytokine release and splenic NK activity were not affected by G. frondosa administration, either. On the other hand, the phagocytic activity was enhanced in leucocytes of groups G3 and G5, without exerting detectable levels of serum proinflammatory cytokines. These results suggested that oral administration of submerged cultivated G. frondosa mixture may enhance host innate immunity against foreign pathogens without eliciting adverse inflammatory response.
Wang
Lisu
L
Department of Environmental and Occupational Health, Medical College, Cheng-Kung University, Tainan 701, Taiwan.
Ha
Choi-Lan
CL
Cheng
Tso-Lin
TL
Cheng
Su-Yun
SY
Lian
Tzi-Wei
TW
Wu
Ming-Jiuan
MJ
D000241:Adenosine / Q000302:isolation & purification; D000284:Administration, Oral; D000818:Animals; D001835:Body Weight / Q000187:drug effects; D002241:Carbohydrates / Q000302:isolation & purification; D016207:Cytokines / Q000187:drug effects / Q000378:metabolism; D004032:Diet; D019587:Dietary Supplements; D005260:Female; D005285:Fermentation; D048691:Grifola / Q000737:chemistry*; D007113:Immunity, Innate / Q000187:drug effects*; D007962:Leukocytes / Q000187:drug effects* / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D025282:Mycelium / Q000737:chemistry; D010587:Phagocytosis / Q000187:drug effects*; D013154:Spleen / Q000166:cytology / Q000187:drug effects
D002241:Carbohydrates; D016207:Cytokines; D000241:Adenosine