PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 19121393-2 2009 Here we assessed, by means of rat-liver perfusion, the direct influence of physiological (10 ng/ml) and supraphysiological (50 or 100 ng/ml) concentrations of leptin on the suppressive effect of insulin on the glucose production and glycogenolysis stimulated by 8-bromoadenosine-3":5"-monophosphate (8-Br-cAMP). 5"-monophosphate 282-298 leptin Rattus norvegicus 159-165