[Ganoderma polysaccharides antagonize prostaglandin E2-induced suppression of murine splenocyte IFN-gamma and TNF-alpha mRNA expression].
OBJECTIVE
To determine if Ganoderma polysaccharides can antagonize prostaglandin E2 (PGE2)-induced suppression of murine splenocyte interferongamma (IFN-gamma) and tumor necrosis factor alpha (TNF-alpha) mRNA expression.


METHODS
Mixed lymphocyte culture reaction was used as the experimental model. The expressions levels of IFN-gamma and TNF-alpha mRNA were measured by semi-quantitative reverse transcriptase-polymerase chain reaction (RT-PCR).


RESULTS
After the cultures were treated with PGE2 for 4 h, IFN-gamma mRNA expression was reduced as compared with the control, which was especially obvious when PGE2 concentrations exceeded 10 micromol/L (P<0.01). Ganoderma polysaccharides above 100 mg/L showed partial antagonistic effect against the inhibition of IFN-gamma by PGE2 at the fixed concentration of 20 micromol/L. Further studies indicated that PGE2 (20 micromol/L) impaired the expression of TNF-alpha mRNA after an 8-hour incubation and Ganoderma polysaccharides above 100 mg/L could partially antagonize this effect.


CONCLUSIONS
Ganoderma polysaccharides can partially antagonize PGE2-induced suppression of murine splenocyte IFN-gamma and TNF-alpha mRNA expression.
Zhang
Qun
Q
Institute of Pharmaceutical Sciences, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China. zq1979@fimmu.com
Lei
Lin-sheng
LS
Zhu
Zheng-guang
ZG
Yu
Chuan-lin
CL
Wu
Shu-guang
SG
D000818:Animals; D002478:Cells, Cultured; D015232:Dinoprostone / Q000494:pharmacology*; D005260:Female; D015870:Gene Expression / Q000187:drug effects; D007371:Interferon-gamma / Q000235:genetics*; D008214:Lymphocytes / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D011134:Polysaccharides / Q000494:pharmacology*; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D020940:Reishi / Q000737:chemistry*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013154:Spleen / Q000166:cytology; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics*
D011134:Polysaccharides; D012333:RNA, Messenger; D014409:Tumor Necrosis Factor-alpha; D007371:Interferon-gamma; D015232:Dinoprostone