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发现人红白血病细胞株ＴＦ－１可在人重组白细胞介素－９（ＩＬ－９）刺激下长期生长达５个月，ＩＬＬ－９可抑制ＴＦ－１细胞的ＤＮＡ片段化，抗ＧＭ－ＣＳＦ抗体可抑制ＩＬ－９刺激的ＴＦ－１细胞增殖，从而提供了ＩＬ－９的一个新生物学效应。
It was found that human erythroleukemia cell line TF-1 can grow for 5 months under the stimulation of human recombinant interleukin-9 (IL-9). ILL-9 can inhibit the DNA fragmentation of TF-1 cells, Antibodies can inhibit IL-9-stimulated proliferation of TF-1 cells, thereby providing a new biological effect of IL-9.