Nevertheless, the exact mechanisms of these varieties in leptins effect are still unknown and because the effects of leptin can clearly vary between different types of cancer, different cancer cells, or even at different stages of progression of a given cancer cell type, an important goal to be achieved will be the development of targeted leptin receptor agonists and antagonists aimed at a specific function of leptin and/or a specific marker in a given cancer cell type. Here, LEPR is linked to cancer.