WASHINGTON, June 10 /PRNewswire-FirstCall/ -- Amylin Pharmaceuticals, Inc. (Nasdaq: AMLN - News) today announced study results showing that co-administration of two neurohormones known to have a role in body weight control, amylin (produced by beta cells in the pancreas) and leptin (produced by fat cells), resulted in sustained, fat-specific weight loss in a leptin-resistant animal model of obesity.