blood mononuclear cells from patients with rheumatoid arthritis produce the lymphokine , leukocyte inhibitory factor ( lif ) in response to collagens in vitro , and blood monocytes release prostaglandins ( pge2 ) and a factor , mononuclear cell factor ( mcf ) which stimulates collagenase and pge2 production by cultured synovial cells .
C0033554
prostaglandins
C0012472
pge2