mast细胞作为预制和免疫可诱导TNF-alpha/cachectin的来源
1Department of Pathology, Beth Israel Hospital, Boston, Massachusetts 02215.
Nature
|July 19, 1990
概括
鼠标肥肉细胞组成性地产生和释放瘤缩因子-α (TNF-α). 依赖IgE的激活增强了这种释放,识别了巨细胞作为TNF-alpha参与宿主防御和过敏疾病的关键来源.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 细胞因子研究 细胞因子研究
背景情况:
- 瘤坏死因子-α (TNF-α) 是一种关键的细胞因子,参与炎症,免疫和新陈代谢.
- 虽然巨细胞是已知的生产者,但其他细胞类型,包括巨细胞,也可能产生TNF-alpha.
- 以前的研究表明,巨细胞可能含有类似TNF-alpha的产物.
研究的目的:
- 为了研究TNF-α生物活性的存在和调节,在小鼠的巨细胞.
- 为了确定巨细胞在激活时是否释放TNF-α.
- 确定巨细胞作为TNF-alpha的重要来源.
主要方法:
- 对TNF-alpha生物活性在居住和培养的小鼠腹性巨细胞中的分析.
- 巨细胞的IgE依赖激活.
- 测量TNF-α信使RNA (mRNA) 和激活后的生物活性水平.
主要成果:
- 居民小鼠腹性巨细胞构成性含有大量的TNF-α生物活性.
- 培养的不成熟巨细胞显示TNF-α含量可变.
- 依赖IgE的激活导致细胞外TNF-alpha释放,并增加TNF-alphamRNA和生物活性.
结论:
- 鼠标的巨细胞是预制和可诱导TNF-alpha的重要来源.
- 乳腺细胞衍生的TNF-α释放可能在宿主防御机制中发挥作用.
- 巨细胞TNF-alpha有助于过敏疾病的病理生理学和其他TNF-alpha介导的过程.
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