to investigate the possible aversive stimulus properties of peripherally administered interleukin 1 ( il-1 ) , rats received two pairings of ingestion of a saccharin solution with various doses of recombinant rat interleukin 1 in a conditioned taste aversion paradigm , using 20 mg/kg lipopolysaccharide endotoxin as a positive control .
C0023810
lipopolysaccharide
C0014264
endotoxin