Leptin for Obesity: Previous Failures, Promising Future

The history of obesity research has been highlighted by the discovery of leptin, a hormone crucial for regulating energy balance. Initially identified in 1950 in mice prone to obesity and diabetes, leptin continues to play a crucial role in our understanding of the physiology of obesity. Recombinant leptin showed promise in reducing weight in leptin-deficient mice and humans, but its effectiveness was limited by leptin resistance in diet-induced obesity. Combination therapies with amylin showed enhanced weight loss, but challenges with antibody development arose. Recent studies have explored combining leptin with glucagon-like peptide-1 receptor agonists, showing potential for reducing food intake and body weight by targeting specific neurons in the hypothalamus.