Grabstein K, Eisenman J, Mochizuki D, Shanebeck K, Conlon P, Hopp T, March C, Gillis S
J Exp Med. 1986 Jun 1;163(6):1405-14. doi: 10.1084/jem.163.6.1405.
Murine B cell stimulating factor 1 (BSF-1) was purified to homogeneity from supernatants of a stimulated thymoma cell line. A protein of 18.4 kD with a unique N-terminal amino acid sequence was identified. BSF-1 had a sp act of at least 3.28 X 10(8) U/mg. In addition to its B cell-stimulatory activity, BSF-1 also stimulated the proliferation of several IL-2- and IL-3-dependent cell lines. We conclude that BSF-1 is both a growth factor and a differentiation factor. Finally, these results also suggest additional biologic properties of BSF-1 on lineages besides B lymphocytes.
从小鼠胸腺瘤细胞系的培养上清液中纯化出了具有同质性的小鼠B细胞刺激因子1(BSF-1)。鉴定出一种分子量为18.4 kD、具有独特N端氨基酸序列的蛋白质。BSF-1的比活性至少为3.28×10⁸ U/mg。除了其B细胞刺激活性外,BSF-1还能刺激几种依赖白细胞介素-2和白细胞介素-3的细胞系的增殖。我们得出结论,BSF-1既是一种生长因子也是一种分化因子。最后,这些结果还表明BSF-1除了对B淋巴细胞系外,对其他细胞系也具有额外的生物学特性。