Background: SR141716 has been shown to significantly inhibit food intake and reduce body weight by antagonizing CB(1) receptors. The gut hormones peptide YY(3-36) (PYY(3-36)) and oxyntomodulin (OXM) inhibit food intake through Y(2) and Glucagon-Like-Peptide (GLP)-1 receptors respectively.
Objective: To determine the effects of co-administration of SR141716 with either PYY(3-36) or OXM in mice on food intake.
Methods: Mice (n = 14 per group) were fasted for 16 h prior to study days and given two intraperitoneal injections: study 1, vehicle-saline, SR141716-saline, vehicle-PYY3-36 or SR141716-PYY3-36; study 2: vehicle-saline, SR141716-saline, vehicle-OXM or SR141716-OXM. Food was returned and measured following injections.
Results: Co-administration of SR141716-PYY(3-36) or SR141716-OXM showed greater inhibition in food intake when compared with administration of SR141716, PYY(3-36) or OXM alone.
Conclusion: Our data show that SR141716 in combination with PYY(3-36) or OXM reduces food intake additively in mice.
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