the secretions of interleukin 1 ( il-1 ) , tumour necrosis factor alpha ( tnf ) , and prostaglandin e2 ( pge2 ) of low-dose e. coli lipopolysaccharide ( lps ) -stimulated human monocytes ( m phi ) were investigated in an endotoxin ( et ) -free milieu ( less than 1.6 pg lps/ml ) .
C0014264
endotoxin
C0023810
lps