Menon A K, Holowka D, Baird B
J Cell Biol. 1984 Feb;98(2):577-83. doi: 10.1083/jcb.98.2.577.
We examined the distribution of small oligomers of IgE bound to rat basophilic leukemia cells using fluorescence microscopy. The oligomers were seen to cluster into visible patches on the cell surface at 4 degrees C; at higher temperatures internalization also was observed. In contrast, cells labeled with IgE monomers remained predominantly ring-stained. Evidence is provided that the observed clustering of IgE oligomers is a cell-induced phenomenon, and the possible significance of this clustering is discussed in the context of the oligomer-triggered degranulation of rat basophilic leukemia cells.
我们使用荧光显微镜检查了与大鼠嗜碱性白血病细胞结合的IgE小寡聚物的分布情况。在4摄氏度时,可见寡聚物在细胞表面聚集成可见的斑块;在较高温度下,还观察到内化现象。相比之下,用IgE单体标记的细胞主要保持环状染色。有证据表明,观察到的IgE寡聚物聚集是一种细胞诱导现象,并在寡聚物触发大鼠嗜碱性白血病细胞脱颗粒的背景下讨论了这种聚集的可能意义。