Wang J M, Walter S, Mantovani A
Istituto di Ricerche Farmacologiche, Mario Negri, Milan, Italy.
Immunology. 1990 Nov;71(3):364-7.
The present study was designed to re-evaluate the chemotactic activity of recombinant tumour necrosis factor (TNF) and lymphotoxin (LT). TNF and LT induced migration of human monocytes across polycarbonate filter in a 90-min assay. Preincubation with FMLP rendered monocytes unresponsive to subsequent exposure to the same chemoattractant. FMLP-desensitized monocytes retained full responsiveness when exposed to TNF as chemotactic stimulus. The converse was observed when monocytes were deactivated specifically to TNF. FMLP receptor antagonists did not interfere with TNF chemotaxis. A monoclonal anti-TNF antibody inhibited the chemotactic activity of recombinant TNF. These results indicate that, under the experimental conditions utilized here, TNF elicits chemotaxis of human monocytes.
本研究旨在重新评估重组肿瘤坏死因子(TNF)和淋巴毒素(LT)的趋化活性。在一项90分钟的试验中,TNF和LT诱导人单核细胞穿过聚碳酸酯滤膜迁移。用甲酰甲硫氨酰-亮氨酰-苯丙氨酸(FMLP)预孵育使单核细胞对随后暴露于相同趋化因子无反应。当暴露于TNF作为趋化刺激时,FMLP脱敏的单核细胞保持完全反应性。当单核细胞被特异性地对TNF失活时,观察到相反的情况。FMLP受体拮抗剂不干扰TNF趋化作用。一种单克隆抗TNF抗体抑制重组TNF的趋化活性。这些结果表明,在此处使用的实验条件下,TNF引发人单核细胞的趋化作用。