il-1-induced il-1 production was unlikely to be caused by endotoxin contamination of tissue culture media or il-1 preparations , because the lipopolysaccharide ( lps ) antagonist polymyxin b ( 10 micrograms/ml ) blocked lps-induced il-1 production by ec but did not affect il-1 release in response to ril-1-beta ( 100 ng/ml ) .
C0086418
ril-1
C0021753
ril-1-beta