文摘
Mushrooms have a long history of dietary benefits in Asia due to their health-promoting effects. Phellinus baumii, a wild mushroom, has been reported to have anti-platelet, anti-inflammatory, anti-obesity and free radical scavenging activities. However, its anti-rheumatoid arthritis (RA) property remains poorly understood. Hence, we investigated the protective effect of Phellinus baumii ethyl acetate extract (PBEAE) against bovine collagen type II induced arthritis (CIA) in DBA/1 mice. PBEAE (50 and 150?mg/kg) reduced the CIA score and leukocyte count in draining lymph nodes (DLNs) and inflamed joints. PBEAE also attenuated the expressions of CD3+ (T cells), CD19+ (B cells), CD4+ (T-helper), CD8+ (T-cytotoxic), MHC class II/CD11c+ (antigen-presenting cells), double positives (B220+/CD23+ and CD3+/CD69+: early lymphocyte activation markers) and CD4+/CD25+ (activated T-helper) leukocyte subpopulations in DLNs. Likewise, CD3+ and Gr-1+CD11b+ (neutrophil) counts in inflamed joints were also decreased. Furthermore, PBEAE reduced the serum levels of anti-collagen type immunoglobulin G, tumor necrosis factor-α and interleukin (IL)-1β and IL-6. Taken together, PBEAE impaired cellular recruitment to the inflamed joint and alleviated CIA, and thus could be considered as a potential agent against rheumatoid arthritis