Tohyama N, Karasuyama H, Tada T
Department of Immunology, Faculty of Medicine, University of Tokyo, Japan.
J Exp Med. 1990 Feb 1;171(2):389-400. doi: 10.1084/jem.171.2.389.
We introduced an IL-6 cDNA expression vector into a murine B cell line, the growth of which definitely required the presence of exogenous IL-6. The transfected cells secreted substantial amounts of IL-6, to which they themselves responded by proliferating without further requirement of exogenous IL-6. The proliferation was a direct function of cell density and was inhibitable by antibodies to IL-6, indicating the autocrine nature of the growth. The IL-6 cDNA-transfected cells displayed greatly enhanced tumorigenicity when inoculated into syngeneic and nude mice. Our data suggest that an IL-6 autocrine self stimulation confers on B cells a selective growth advantage and results in the induction of progression of the malignant state of B cells.
我们将白细胞介素-6(IL-6)的互补DNA(cDNA)表达载体导入一种小鼠B细胞系,该细胞系的生长绝对需要外源性IL-6的存在。转染后的细胞分泌大量IL-6,它们自身对其作出反应,通过增殖而不再需要外源性IL-6。这种增殖是细胞密度的直接函数,并且可被抗IL-6抗体抑制,表明这种生长具有自分泌性质。当将IL-6 cDNA转染的细胞接种到同基因和裸鼠体内时,它们表现出大大增强的致瘤性。我们的数据表明,IL-6自分泌自我刺激赋予B细胞选择性生长优势,并导致B细胞恶性状态进展的诱导。