recently , it has been shown that the cytokines interleukin-1 ( il-1 ) , tumor necrosis factor alpha ( tnf alpha ) , and tnf beta [ also called lymphotoxin ( lt ) ] produced by immune cells all stimulate osteoclast activity , whereas the lymphokine interferon-gamma ( ifn gamma ) inhibits osteoclast activity stimulated by these agents .
C0024320
lymphotoxin
C0024297
lymphokine