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The effects of Ganoderma lucidum polysaccharides on the activity of microglia in rat primary glia stimulated with lipopolysaccharides and the expression of TNF-a mRNA and iNOS mRNA
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF NEUROMEDICINE
- Issue:
- 4
- DOI:
- 10.3760/cma.j.issn.1671-8925.2006.04.002
- Key Word:
- 小胶质细胞;脂多糖;灵孢多糖;肿瘤坏死因子a;一氧化氮合酶
Abstract： 目的观察灵孢多糖对脂多糖诱导的小胶质细胞激活的影响及对TNF-amRNA和iNOSmRNA表达的影响.方法建立中脑原代小胶质细胞的培养,用灵孢多糖预处理30min,再加入脂多糖处理24 h,通过免疫组化检测OX-42的阳性细胞数及RT-PCR检测TNF-amRNA和iNOSmRNA的表达.结果激活的小胶质细胞体积增大,细胞数量增多,TNF-amRNA和iNOSmRNA表达增高,但经较大剂量灵孢多糖(100μg/mL,300μg/mL)预处理后,小胶质细胞的激活被抑制,且总的细胞数量显著减少(P＜0.01),TNF-a mRNA和iNOS mRNA表达量也降低(P＜0.01).结论灵孢多糖可以减少TNF-amRNA和iNOSmRNA的表达,可能是由于灵孢多糖的预处理阻断了由脂多糖诱导的小胶质细胞的激活,提示灵孢多糖可能对中脑多巴胺能神经元具有保护作用.
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